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Sample records for condutos radiculares irradiados

  1. Apical microinfiltration evaluation of radicular channels irradiated with Er:YAG laser in vitro; Avaliacao da microinfiltracao apical de condutos radiculares irradiados in vitro com laser de Er:YAG

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    Sebrao, Catia Cilene Nass

    2003-07-01

    It was evaluated, in vitro, the adaptation of the filling material (Sealer 2S{sup R}) to the root channels dentine walls treated using the endodontic technique and prepared with the Er:YAG laser, by the technique of infiltration of methylene blue dye. Using scanning electronic microscopy, the morphologic alteration of the root channel dentine was observed for one sample per studied group. Also, an evaluation of the temperature increase in the external surface of the root during the irradiations was performed for two samples per group. For each group of samples, with eleven roots each, two sub-groups had been considered: the dry, irradiated after completely dry with absorbent cones of paper, and the humid, where a cone of absorbent paper was applied for two seconds in the root canal, leaving them lightly humidified. Considering the used energies for the irradiations, the groups are: G1, control (without irradiation), G2-dry (100 mJ-10 Hz), G2-humid (100 mJ-10 Hz), G3-dry (140 mJ-6 Hz), G3-humid (140 mJ-6 Hz), G4-dry (180 mJ-6 Hz), and G4-humid (180 mJ-6 Hz). The results had shown that apical microinfiltration did not exhibit significant difference among groups. The highest increase in temperature was observed for the dry groups, with the maximum variation of temperature of 6.5 deg C. Under the scanning electronic microscopy analysis, the humid groups had presented cleaner surfaces than the dry groups. The G4-humid group presented extensive regions of fusion and resolidification of the dentine. (author)

  2. Assessment of the bacteria reduction in the infected root canal irradiated with diode laser; Avaliacao da reducao bacteriana em conduto radicular infectado e irradiado com laser de diodo. Estudo in vitro

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    Radaelli, Claudia Amaral Rabello de Mello

    2002-07-01

    High success rates are achieved in conventional endodontic treatment of vital pulp teeth. However, in cases of non-vital pulp, a decrease in the rate of success occurs due to difficulties in achieving a complete disinfection of the root canals system. Some bacteria, such as Enterococcus faecalis, are frequently found in cases of endodontic treatment failure due to their high resistance to the conventional endodontic treatment. The aim of this study was to evaluate the efficiency of a high power diode laser irradiation in bacterial reduction of contaminated canals associated with dressing compose by calcium hydroxide paste propylene glycol and camphorated paramonochlorophenol. Eighty-two root canals were infected in vitro with Enterococcus faecalis in a concentration of 1x10{sup 8} CFU/ml. Specimens were high intensity irradiated with a diode laser model Opus 10, at a wavelength of 830 nm. Two different parameters were employed in continuous mode: 3 W and 2,5 W with a 360 {mu}m optical fiber at an angle of approximately 5 degrees respect to the dentine surface during 5 seconds, in 4 applications, with 20 seconds intervals among them. After these proceedings specimens were vortexed in peptone water and dilutions performed. Aliquots of the dilution were plated on m-Enterococcus agar, incubated, and the Colonies Forming Units (CFU) of ali groups was counted. The results showed a significant reduction of bacteria on ali groups after laser irradiation. A high reduction rate was achieved: 98.5% immediately after the laser irradiation; 48 hours after, the reduction was of 96,73% and, finally, a 100% reduction was achieved through the combination of laser irradiation and a long lasting dressing of calcium hydroxide paste, propylene glycol and camphorated paramonochlorophenol. High rates of bacteria reduction were achieved using the parameter of 3 W in continuous mode with the power of 2,9473 KW/cm{sup 2}. The temperature was monitored with a K-pipe thermocouple placed at the periapical point which width measured 1 mm, approximately. The maximum temperature variation was 7.45 deg C. Under electron microscope scanning, the control groups showed areas with smear layer covering the dentinal walls. The laser irradiated groups showed a smooth, uniform, clean appearance, with small areas of closed dentinal tubules without cracking alternately with areas of exposed open dentinal tubules. Some parts showed fusion of the dentinal mass (groups irradiated with 3 W). In groups where calcium hydroxide was associated with laser irradiation remains were found over the irradiated surface and, in many parts, the dentinal tubules could not be observed. The use of high intensity diode laser at 830 nm proved to be efficient and able to promote reduction in the Enterococcus faecalis population in the infected root canals. (author)

  3. Alimentos irradiados

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    Sendra, E.

    2001-01-01

    Full Text Available Not available

    La industria alimentaria y las administraciones públicas realizan grandes esfuerzos para mejorar el mantenimiento de las condiciones higiénicas y evitar la contaminación de alimentos. Pese a estos esfuerzos siguen produciéndose un gran numero de procesos patológicos relacionados con los alimentos. Las buenas prácticas higiénicas pueden reducir el nivel de contaminación, pero algunos microorganismos patógenos resulta imposible eliminarlos, especialmente de aquellos alimentos que se comercializan crudos y con procesado mínimo. La irradiación se presenta como un método de descontaminación posible para este grupo de alimentos, especialmente válido como método de descontaminación final. Dosis de irradiación inferiores a 10 kGy (dependiendo del alimento y condiciones son efectivas para eliminar posibles patógenos no esporulados, inactivar parásitos, tratar especias, condimentos y otros ingredientes secos, fruta fresca y productos de cuarta gama (vegetales frescos, limpios y envasados, listos para consumo. Respecto a la seguridad de los alimentos irradiados, está plenamente demostrado que no provoca la aparición de compuestos especiales y provoca una ligera reducción en el contenido de algunas vitaminas, que es equiparable a la producida por otros tratamientos tecnológicos. Se ha visto también que microorganismos que han sido sometidos a radiaciones y han sobrevivido a ellas se muestran más sensibles a las condiciones ambientales de estrés que aquellos que nunca han sido irradiados. Pese a que los organismos internacionales FAO y OMS presentan la irradiación como un método seguro, eficaz, limpio con el medio ambiente y energéticamente eficiente, los consumidores siguen estando desinformados y mostrándose reticentes a su utilización. En la actualidad se están llevando a cabo muchos sondeos, de los que se deriva que una correcta in formación al consumidor es el único método válido para conseguir la

  4. O conduto valvulado bovino contegra, um biomaterial para o tratamento cirúrgico de cardiopatias congênitas

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    Shi-Min Yuan

    Full Text Available O Contegra, um enxerto de veia jugular bovina, tem sido amplamente utilizado como biomaterial de preferência no tratamento cirúrgico das cardiopatias congênitas, especialmente como um conduto para a reconstrução da via de saída ventricular direita. Este artigo tem como objetivo fazer uma revisão abrangente sobre os desfechos clínicos do Contegra. Foram recuperados, coletados e analisados, relatos de Contegra publicados desde 2002. Havia 1.718 Contegra, aplicados em 1.705 pacientes. Os tamanhos dos condutos foram de 8-22 mm. As idades dos pacientes foram de recém-nascidos até 74,5 anos, com prevalência de pacientes pediátricos. O diagnóstico primário foi cardiopatia congênita em todos os casos, sendo os três diagnósticos principais: tetralogia de Fallot, tronco arterioso e atresia pulmonar, que representaram 25,6%, 16,7% e 13,1%, respectivamente. O Contegra foi utilizado como enxerto tubular na posição pulmonar em 1635 (95,9% pacientes, como remendo monocúspide em 12 (0,7%, como enxerto na posição da valva pulmonar ou monocúspide em 40 (2,3%, e, como conduto artéria pulmonar-veia cava inferior na operação de Fontan, em 18 (1,1% pacientes, respectivamente. O reimplante de conduto foi realizado em 141 (8,3% pacientes, 33,8 ± 37 (8,6-106,8 meses após a inserção do conduto inicial. A plástica do conduto foi necessária em seis (0,4% e a reintervenção em 83 (4,9% dos pacientes. As indicações do reimplante do conduto incluíram estenose importante da anastomose distal, pseudoaneurisma da anastomose proximal e regurgitação importante do conduto. Quanto ao bom desempenho, disponibilidade e longevidade, o Contegra é um biomaterial adequado para a reconstrução da via de saída ventricular direita e como remendo para reparo de comunicação interventricular, mas não é apto para a operação de Fontan.

  5. Reconstrução da aorta com conduto de pericárdio bovino corrugado

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    Claudio A. Salles

    1998-04-01

    Full Text Available No período de outubro de 1989 a maio de 1997, 40 pacientes portadores de dissecção aórtica, aneurisma da aorta, coarctação da aorta ou doença oclusiva aorto-ilíaca foram submetidos a reconstrução da aorta utilizando-se conduto de pericárdio bovino corrugado processado em glutaraldeído. A reconstrução total da aorta ascendente com substituição da valva aórtica e reimplante das artérias coronárias foi realizada em 9 pacientes, a simples substituição da aorta ascendente em 6, aorta torácica descendente em 2, arco aórtico em 1, aorta toracoabdominal em 1 e a aorta abdominal foi reconstruída em 21, incluindo pacientes submetidos a reconstrução aorto-ilíaca ou aorto-femoral. A mortalidade hospitalar foi de 8 (20% pacientes e as causas de óbito foram baixo débito cardíaco, recidiva da dissecção aórtica, falência de múltiplos órgãos e sangramento. O seguimento total foi de 128,4 pacientes-anos, com um seguimento médio de 4 anos por paciente. Complicações tardias relacionadas ao conduto vascular foram observadas em 4 pacientes, incluindo obstrução de um dos ramos do tubo bifurcado utilizado para reconstrução aorto-femoral e infecção em 3, resultando em degeneração secundária do conduto e formação de pseudo-aneurisma. Os 4 pacientes foram submetidos a reoperações, correspondendo a uma incidência de 3,1% ± 1,6% por paciente/ano. Ocorreram 5 óbitos tardios e as causas foram morte súbita, doença coronariana, pneumonia, septicemia e complicações metabólicas resultantes de diabetes e insuficiência renal crônica, correspondendo a uma incidência de 3,9% ± 1,7% por paciente/ano. A sobrevida atuarial em 9 anos foi 61,5% ± 9,2%, incluindo a mortalidade cirúrgica e a sobrevida atuarial livre de degeneração tissular estrutural primária do conduto biológico foi de 100%. O corrugamento do pericárdio, resultante da incorporação do princípio crimping utilizado nas próteses vasculares sint

  6. Giant radicular cyst of the maxilla

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    Deshmukh, Jeevanand; Shrivastava, Ratika; Bharath, Kashetty Panchakshari; Mallikarjuna, Rachappa

    2014-01-01

    Radicular cysts are inflammatory odontogenic cysts of tooth bearing areas of the jaws. Most of these lesions involve the apex of offending tooth and appear as well-defined radiolucencies. Owing to its clinical characteristics similar to other more commonly occurring lesions in the oral cavity, differential diagnosis should include dentigerous cyst, ameloblastoma, odontogenic keratocyst, periapical cementoma and Pindborg tumour. The present case report documents a massive radicular cyst crossing the midline of the palate. Based on clinical, radiographical and histopathological findings, the present case was diagnosed as an infected radicular cyst. The clinical characteristics of this cyst could be considered as an interesting and unusual due to its giant nature. The lesion was surgically enucleated along with the extraction of the associated tooth; preservation of all other teeth and vital structures, without any postoperative complications and satisfactory healing, was achieved. PMID:24792022

  7. Immunoexpression of vascular endothelial growth factor in periapical granulomas, radicular cysts, and residual radicular cysts.

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    Nonaka, Cassiano Francisco Weege; Maia, Alexandre Pinto; Nascimento, George João Ferreira do; de Almeida Freitas, Roseana; Batista de Souza, Lélia; Galvão, Hébel Cavalcanti

    2008-12-01

    Our aim was to assess and compare the immunoexpression of vascular endothelial growth factor (VEGF) in periapical granulomas (PGs), radicular cysts (RCs), and residual radicular cysts (RRCs), relating it to the angiogenic index and the intensity of the inflammatory infiltrate. Twenty PGs, 20 RCs, and 10 RRCs were evaluated by immunohistochemistry using anti-VEGF antibody. Angiogenic index was determined by microvessel count (MVC) using anti-von Willebrand factor antibody. The PGs and RCs showed higher expression of VEGF than the RRCs. Lesions presenting few inflammatory infiltrate revealed the lowest immunoexpression of VEGF (P .05). VEGF is present in periapical inflammatory lesions but at a lower level in RRCs. The expression of this proangiogenic factor is closely related to the intensity of the inflammatory infiltrate in these lesions.

  8. Radicular cyst of maxillary primary tooth: Report of two cases

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    Vinod Vijay Chander

    2014-01-01

    Full Text Available Radicular cyst is one of the most common odontogenic cysts of the jaws, but those arising from primary teeth are very rare. This article reports two such rare cases incidentally affecting deciduous maxillary teeth.

  9. Mixed periapical lesion: an atypical radicular cyst with extensive calcifications.

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    Ramos-Perez, Flávia Maria de Moraes; Pontual, Andréa dos Anjos; França, Talita Ribeiro Tenório de; Pontual, Maria Luiza dos Anjos; Beltrão, Ricardo Villar; Perez, Danyel Elias da Cruz

    2014-01-01

    The radicular cyst is an inflammatory odontogenic cyst of endodontic origin. Radiographically, the lesion appears as a periapical radiolucent image. This report describes a very rare case of a mixed periapical radiographic image diagnosed as a radicular cyst. A 37-year-old female patient presented a mixed, well-circumscribed image located in the periapical region of the left maxillary central incisor, which presented unsatisfactory endodontic treatment. Microscopic examination revealed a cavity lined by non-keratinized squamous epithelium and extensive calcifications in the cystic lumen and lining epithelium. Diagnosis of radicular cyst with extensive calcifications was established. Endodontic retreatment was performed and no radiographic signs of recurrence were observed 18 months after treatment. Although very rare, a radicular cyst should be considered in the differential diagnosis of a mixed periapical image associated to teeth with pulp necrosis.

  10. Carcinoma espinocelular do conduto auditivo externo: estudo por tomografia computadorizada de seis casos Squamous cell carcinoma of the external auditory canal: computed tomography findings in six cases

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    Fábio Mota Gonzalez

    2005-06-01

    Full Text Available OBJETIVO: Analisar a importância da avaliação tomográfica da extensão profunda dos carcinomas espinocelulares do conduto auditivo externo. MATERIAIS E MÉTODOS: Foram realizados exames tomográficos com cortes axiais e coronais com janelas para partes moles e óssea em seis pacientes com carcinoma espinocelular do conduto auditivo externo, com idade variando entre 55 e 71 anos, internados no Hospital Heliópolis, no período entre maio de 1995 e dezembro de 2003. RESULTADOS: Dos seis pacientes, todos apresentavam aumento de partes moles no conduto auditivo externo, cinco (83,3% tinham erosão óssea e invasão da orelha média, quatro (66,7% possuíam comprometimento da mastóide e da glândula parótida, três (50% apresentavam invasão da articulação temporomandibular, dois (33,3% tinham invasão da fossa média, do canal carotídeo e linfonodomegalia júgulo-carotídea alta ipisilateral. CONCLUSÃO: A avaliação da extensão tumoral profunda fornecida pela tomografia computadorizada é importante no estadiamento clínico, possibilitando um planejamento terapêutico mais eficaz.OBJECTIVE: To evaluate the role of computed tomography in the assessment of deep extension of squamous cell carcinoma of the external auditory canal. MATERIALS AND METHODS: In the period between May 1995 and December 2003 six patients with squamous cell carcinoma of the external auditory canal were submitted to computed tomography scan at "Hospital Heliópolis", São Paulo, SP, Brazil, including axial and coronal slices with soft tissue and bone algorithms. RESULTS: Thickening of the soft tissue of the external auditory canal was seen in all patients, bone erosion and invasion of the middle ear in five (83.3%, invasion of the mastoid and parotid gland in four (66.7%, invasion of the temporomandibular joint in three (50%, and invasion of the middle cranial fossa, carotid canal and cervical lymph node enlargement in two (33.3% patients. CONCLUSION: Assessment of

  11. Salivary flow and corono-radicular caries in elderly patients

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    Campodónico Reategui, Carlos; Chein Villacampa, Sylvia; Benavente Lipa, Lourdes; Delgadillo Avila, Juana; Alvarez Paucar, Maria Angelica; Espinoza Escajadillo, Sofia; Vidal Goñi, Raúl; Ventocilla Huasupoma, Maria; Evaristo Chiyong, Teresa

    2014-01-01

    The aim of this study was to determine the correlation between hypo-salivation and corono-radicular caries in older adult patients, which analyzed the physicochemical properties of saliva (flow, pH), the frequency and location of the corono-radicular caries. Was selected a sample of 45 persons, adult patients over 60 years and another 18 to 26 years (control group), from service centers, hospitals and universities. The technique of collection of saliva, consisted of making chewing a piece of ...

  12. Role of tumour necrosis factor in pathogenesis of radicular cyst

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    Qureshi, W.U.R.; Idris, M.; Khan, S.A.

    2011-01-01

    Background: The radicular cyst is very common odontogenic cyst of the jaws, which is usually associated with a tooth with necrotic pulp. The cyst formation requires proliferation of the epithelial rest cells of Malassez present in the periodontal ligament. Proliferation of epithelial rest cells of Malassez is an essential event in the Pathogenesis of radicular cyst. The wall of the cyst contains epithelial cells, macrophages, fibroblasts and other cells. TNF is one of inflammatory mediators, which is produced by macrophages and monocytes. This study was carried out to investigate the role of tumour necrosis factor in the pathogenesis of radicular cyst, which is by far the commonest cystic lesion of the jaws. Methods: Explants from 20 radicular cysts were cultured in vitro to grow the epithelial cells. However, the cultures were rapidly contaminated with fibroblasts and it was impossible to grow the epithelial cells separately. Therefore, the proliferative effect of Tumour Necrosis Factor (TNF) was studied on mammalian epithelial cells. Results: TNF at low concentration had a proliferative effect on the epithelial cells, which may play some role in pathogenesis of radicular cyst. Conclusion: TNF stimulated the epithelial cell proliferation in low concentration and inhibit the proliferation in higher concentrations. These two effects may have some implications in the pathogenesis of radicular cyst. (author)

  13. Bilateral radicular cyst in mandible: an unusual case report.

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    Bava, Fareed Ahmed; Umar, Dilshad; Bahseer, Bahija; Baroudi, Kusai

    2015-02-01

    A radicular cyst is one of the furthermost everyday odontogenic cysts of the anterior maxilla, not regularly comprehended in youth. They are found mostly at the apices of the tooth (periapical cyst), lateral surface of the roots (lateral radicular cyst) and remains in the jaw after removal of the offending tooth (residual cyst). The radicular cyst has been catalogued as an inflammatory cyst, as an outcome to pulpal necrosis succeeding caries, with a linked periapical inflammatory reaction. They advance sluggishly and asymptomatic lest infected. Because of this they can extent to big dimensions. Many times it is perplexing to segregate radicular cysts from the obligatory pre-existing chronic periapical periodontitis lesions radiographically. Here, we present a rare case with bilateral radicular cyst in relation to first molar of the mandible in a 19-year-old. Orthopantomograph showed a large unilocular radiolucency with a well-defined border in the periapical region of the first molar on the left side extending from the root of the second premolar to the mesial root of the second molar. Correspondingly another well-defined unilocular radiolucency with a well-defined border was seen on the right side of the mandible. Several treatment possibilities are presented for a radicular cyst such as surgical endodontic treatment, extraction of the transgressing tooth, enucleation with primary closure, and marsupialization trailed by enucleation. The patient management comprised surgical enucleation of cystic sac followed by rehabilitation of the same area.

  14. Using Periapical Radiography to Differentiate Periapical Granuloma and Radicular Cysts

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    Farhadi

    2016-06-01

    Full Text Available Background The distinction between radicular cysts and apical granulomas is important in treatment decision. Objectives The current study aimed to differentiate these two lesions based on radiography images. Patients and Methods The material consisted of 138 radiographs obtained using Kodak E -speed, in patients aged 29 to 47, divided into two groups: 109 granulomas and 29 radicular cysts. Size of radiography images was measured; the tooth then was extracted and examined in pathologist lab. The results were analyzed by SPSS.15 and ROC curve was created to find cut-off point to differentiate periapical granuloma and radicular cysts. Results Average size of radiography in periapical granuloma was 7.4 mm and for a radicular cyst was 11.1 mm. Cut-off point was 8.2 mm and the area under curve (AUC was 0.63. Also, the tests were 83% sensitive and 79% specific. Conclusions Based on 8.2 mm cut-off point could differentiate 83% periapical granulomas and 79% radicular cysts from radiography images.

  15. Role of matrix metalloproteinases in radicular cysts and periapical granulomas.

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    D'addazio, G; Artese, L; Piccirilli, M; Perfetti, G

    2014-01-01

    The aim of the present study was to evaluate the expression and distribution of different classes of matrix metalloproteinases (MMPs) in radicular cysts and periapical granulomas. Twenty consecutive specimens of radicular cysts and 20 of periapical granulomas were selected. Expression of MMP-2, -9, -8, -13, -3 was immunohistochemically evaluated. The intensity of expression of the MMPs was evaluated using a semi-quantitative analysis: low = +; intermediate = ++; high = +++. Positive expression of MMPs was present with different distribution. MMP-9 expressed differently in the lesions. Indeed, in periapical granulomas low expression was found in endothelial cells and fibroblasts, whilst high intensities were only detected in inflammatory cells. On the contrary, in radicular cysts the high intensities were mainly present in keratinocytes and fibroblasts. MMP-8 was mainly expressed in inflammatory cells of periapical granulomas. MMP-2 and -3 presented a low intensity of expression in both groups. MMP-13 showed a variable pattern of distribution in the different cell types of the two different lesions. The present investigation supports the role of MMPs in the inflammatory process leading to the development of radicular cysts and periapical granulomas. The results of the present study suggested that the increased enlargement of radicular cysts, compared to periapical granulomas, might be related to a higher expression of MMP-9. On the other hands, the higher intensity of expression of MMP-8 in periapical granulomas could be related to an active inflammatory process. MMP-8 could play an important role in the inflammation processes during the development of periapical lesions.

  16. Manejo de conductos radiculares con curvatura marcada

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    Jorge Mario Nuñez Duran

    2013-10-01

    Full Text Available Las variaciones anatómicas en dientes con conductos que poseen dilaceraciones hacen del tratamiento de endodonciaun reto o una complicación relativa, en donde el clínico debe desarrollar toda su habilidad y el uso de instrumentosespeciales que faciliten u optimicen la terapia de conductos radiculares. La toma de radiografías previas con diferentesangulaciones y el estudio minucioso de ellas, darán una ayuda fundamental para conocer más detalladamente estacomplicación anatómica, que en algunos casos es muy frecuente. El uso de instrumental más flexible y resistentepermite llegar con mayor precisión y seguridad a la parte apical sin que se corra el riesgo de fracturar los instrumentos,limpiándolos y modelándolos en toda su extensión para poder obturarlos de una manera correcta.El uso de limas de menor calibre, precurvadas, permite acceder a la porción dilacerada de la raíz. Este es un métodoeficaz para prevenir la perdida de longitud de trabajo y evitar así las perforaciones de las raíces durante la preparación.Dentro de los errores más comunes durante la instrumentación de los conductos está la perdida de longitud detrabajo, junto con la transportación del foramen apical, ya sea de manera externa o interna. En el presente artículose menciona el uso de nuevas y mejores técnicas usadas para poder evitar este tipo de errores y se muestra un casoclínico del manejo de un molar superior con una curvatura de 40 grados que fue preparado y obturado exitosamentecon el sistema Protaper (Dentsply- maillefer.

  17. Quistes radiculares. Posibilidad de tratamiento endodóncico

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    Canalda Sahli, Carlos; Canalda Piera, Carlos

    1981-01-01

    Las principales complicaciones apicales y periapicales de la gan­grena pulpar, son la periodontitis apical crónica y el quiste radicular. Representan el 90 por ciento del total de lesiones apicales (BHASKAR). El 10 por ciento restante, corresponde a lesiones mucho menos habi­tuales: cementoma, absceso alveolar, quiste residual, tumor de células gigantes, etc. El tratamiento del granuloma y del quiste radicular ha evolucio­nado en el tiempo en un sentido más conservador. La existencia de una l...

  18. An unusual case report of bilateral mandibular radicular cysts

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    Niyanta S Joshi

    2011-01-01

    Full Text Available A radicular cyst is one of the most common odontogenic cysts of anterior maxilla, not commonly seen in adolescence. Here, we present a rare, atypical case, of bilateral radicular cysts of the mandibular posterior region in a 13-year-old girl. The patient management comprised surgical enucleation of cystic sac under general anesthesia followed by rehabilitation of the same area. The purpose of this article is to lay emphasis on the pedodontist′s role in early diagnosis and treatment of such lesions.

  19. EXTENSIVE RADICULAR CYST OF THE MANDIBLE: A RARE CASE REPORT

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    Gokul VENKATESHWAR

    2013-03-01

    Full Text Available The radicular cyst is the most common inflammatory odontogenic cystic lesion of the jaws. It usually originates as a sequel to a periapical inflammatory process, following chemical, physical or bacterial injury. Due to its chronic etiology, the cyst usually appears towards the later stage of life. It has a male sex predilection, with the maxillary anterior region as the most common site of involvement. This article reports a rare case of a large radicular cyst in the mandible, its management and follow up along one year.

  20. Activación del topacio natural irradiado por neutrones en el núcleo del reactor RP-10

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    Gómez, J.; Parreño, Fernando; Lázaro, Gerardo; Vela, Mariano

    2003-01-01

    Se obtuvieron cristales de topacio activados al ser irradiados con neutrones dentro del núcleo del reactor RP-10. La activación depende del flujo de neutrones, por ello se desarrolló portamuestras (canes de irradiación) para absorber que son los causantes de la activación

  1. Morphologic analysis, by means of scanning electron microscopy, of the effect of Er: YAG laser on root surfaces submitted to scaling and root planing Análise morfológica, através de microscopia eletrônica de varredura, da ação do laser de Er: YAG em superfícies radiculares submetidas à raspagem e aplainamento radicular

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    Letícia Helena Theodoro

    2002-12-01

    Full Text Available The purpose of this study was to morphologically evaluate, by means of scanning electron microscopy, the effects of Er:YAG laser on the treatment of root surfaces submitted to scaling and root planing with conventional periodontal instruments. Eighteen root surfaces (n = 18, which had been previously scaled and planed, were assigned to 3 groups (n = 6. The control Group (G1 received no further treatment; Group 2 (G2 was irradiated with Er:YAG laser (2.94 mum, with 47 mJ/10 Hz, in a focused mode with air/water spray during 15 s and with 0.57 J/cm² of fluency per pulse; Group 3 (G 3 was irradiated with Er:YAG laser (2.94 mum, with 83 mJ/10 Hz, in a focused mode with air/water spray during 15 s and with 1.03 J/cm² of fluency per pulse. We concluded that the parameters adopted for Group 3 removed the smear layer from the root surface, exposing the dentinal tubules. Although no fissures, cracks or carbonized areas were observed, an irregular surface was produced by Er:YAG laser irradiation. Thus, the biocompatibility of the irradiated root surface, within the periodontal healing process, must be assessed.O objetivo do presente estudo foi analisar morfologicamente, através de microscopia eletrônica de varredura, os efeitos do laser de Er:YAG no tratamento de superfícies radiculares submetidas à raspagem e aplainamento radicular com instrumentos manuais. Foram utilizados 18 espécimes (n = 18 de superfícies radiculares que após ser submetidos à raspagem e aplainamento radicular foram divididos em 3 grupos (n = 6. O grupo controle (G1 não sofreu nenhum tratamento; Grupo 2 (G2 foi irradiado com laser de Er:YAG (2,94 mim 47 mJ/10 Hz, focalizado,com refrigeração à água durante 15 s e fluência de pulso de 0,57 J/cm²; Grupo 3 (G3 foi irradiado com laser de Er:YAG (2,94 mim, 83 mJ/10 Hz, focalizado, com refrigeração à agua durante 15 s e fluência de pulso de 1,03 J/cm². Através da análise dos resultados podemos concluir que o laser de

  2. Do neurosurgeons subscribe to the guideline lumbosacral radicular syndrome?

    NARCIS (Netherlands)

    P.A.J. Luijsterburg (Pim); A.P. Verhagen (Arianne); S. Braak (Sigrid); C.J.J. Avezaat (Cees); B.W. Koes (Bart)

    2004-01-01

    textabstractBackground: This study presents a survey of the opinion of neurosurgeons on the multidisciplinary clinical guideline 'lumbosacral radicular syndrome'. The aim was to describe to what extent neurosurgeons in the Netherlands endorse the content of this guideline. The guideline was issued

  3. Reparacion espontánea de fractura radicular horizontal

    Directory of Open Access Journals (Sweden)

    Jorge Elias Dancur Turizo

    2013-10-01

    Full Text Available Resumen Se reporta un caso clínico de una fractura radicular horizontal en un central superior izquierdo, que reparó espontáneamente sin tratamiento dental alguno. La fractura se diagnosticó catorce años después de recibir el trauma, en un examen radiográfico rutinario de la consulta endodóntica, ya que el diente sin ninguna sintomatología presentaba al examen clínico cambio de color y al examen radiográfico se observaba zona radiolúcida en la zona apical, por lo que fue remitida del posgrado de ortodoncia al posgrado de endodoncia de la facultad de odontología de la Universidad de Cartagena. Al examen radiográfico realizado en el posgrado de endodoncia se observa línea de fractura radicular horizontal a nivel de la unión del tercio cervical con el tercio medio de la raíz y además se encuentra un defecto óseo al mismo nivel de la fractura radicular. Se realiza el tratamiento de conducto radicular sin complicación alguna. Este caso es sorprendente por realizarse una reparación espontánea sin tratamiento odontológico alguno y más aún sin emitirse un diagnóstico de fractura radicular con anterioridad. (DUAZARY 2010, 79 - 83AbstractIs reported a clinical case of a horizontal root fracture in a maxillary left central incisor that was spontaneously repaired without any dental treatment is reported. The root fracture was diagnosed in an x-ray endodontic examination routine fourteen years after receiving the trauma due to changes in the color of the tooth and asymptomatic, x-ray examination showed a radiolucent zone apically, reason why the patient was sent from orthodontic service to endodontic service at Dentistry School of Cartagena University. Radiographs examination showed a line of horizontal fracture between the union of the cervical third with the middle third and in addition there is a bone defect at the same level of the root fracture. Root canal treatment is done without any complication. This case is surprising

  4. Utilização de valvas homólogas e heterólogas em condutos extracardíacos The use of homograph and heterograph valves in extracardiac conduits

    Directory of Open Access Journals (Sweden)

    Rui Siqueira de Almeida

    1988-08-01

    Full Text Available O conceito do uso de um conduto extracardíaco para estabelecer uma via de saída, conectando o ventrículo direito com o tronco pulmonar, ou seus ramos, foi desenvolvido na década de 60. Entre 1971 e 1986, 335 pacientes receberam, no The Hospital for Sick Children, de Londres, condutos extracardíacos para o lado direito do coração; 176 destes foram homoenxertos aórticos, preservados em solução antibióticonutriente; 140 heteroenxertos (Hancock, Ross, Carpentier-Edwards, lonescu-Shiley e 19 tubos não valvulados. Estes condutos foram usados na correção de defeitos cardíacos complexos. A idade média foi de 6,34 anos e o peso médio, de 17,8 kg. O diâmetro interno dos condutos variou de 8 a 30 mm. A mortalidade hospitalar foi de 29,2% e o seguimento dos sobrevivente teve uma duração máxima de 14,3 anos, sendo que apenas 40% delas foram relacionadas ao conduto extracardíaco. A curva atuarial, livre de obstrução, dos condutos extracardíacos foi significativa, quando se analisaram os homoenxertos, face a cada grupo de heteroenxertos (p The concept of using extracardiac conduits, to establish an outflow tract between the right ventricle and the pulmonary artery was developed on the sixties. Between 1971 and 1986, 335 patients received extracardiac conduits for the right heart, at The Hospital for Sick Children, London; 176 were antibiotic preserved aortic homografts (Hancock, Ross, Carpentier-Edwards, lonescu-Shiley and 19 non-valved tubes. These conduits were used for the repair of complex congenital heart defects. The mean age of these groups was 6.34 ± 4.6 years and the mean weight 17.8 ± 10.8 kg. The internal diameter of the conduits varied from 8 to 30 mm. The hospital mortality was 29.2% and long-term follow-up of the survivals had a maximum period of 14,39 years. Sixty patients (17.9% were submited to 60 reoperations, being only 40% conduit related. The actuarial survival cun/e of freedom from obstruction was significant

  5. Eosinophilic granuloma in the anterior mandible mimicking radicular cyst

    International Nuclear Information System (INIS)

    Lee, Byung Do; Lee, Wan; Lee, Jun; Son, Hyun Jin

    2013-01-01

    Eosinophilic granuloma is a common expression of Langerhans cell histiocytosis and corresponds with typical bone lesions. The radiographic appearance of eosinophilic granuloma in the jaw is variable and not specific. It may resemble periodontitis, radicular cyst, or malignancies. The purpose of this report is to describe the characteristic radiographic features of eosinophilic granuloma of a 39-year-old male. The lesion in the anterior mandible was first diagnosed as radicular cyst because the radiographic findings were ovoid radiolucent lesion with well-defined border. However, careful interpretation revealed a non-corticated border and floating tooth appearance that were the characteristic radiographic features for the differential diagnosis. Early clinical signs of eosinophilic granuloma can occur in the jaw and a bony destructive lesion might be mistaken for periodontitis or an odontogenic cystic lesion; therefore, careful interpretation of radiographs should be emphasized.

  6. Eosinophilic granuloma in the anterior mandible mimicking radicular cyst

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Byung Do; Lee, Wan; Lee, Jun [College of Dentistry, Wonkwang University, Iksan (Korea, Republic of); Son, Hyun Jin [Dept. of Pathology, School of Medicine, Eulji University, Daejeon (Korea, Republic of)

    2013-06-15

    Eosinophilic granuloma is a common expression of Langerhans cell histiocytosis and corresponds with typical bone lesions. The radiographic appearance of eosinophilic granuloma in the jaw is variable and not specific. It may resemble periodontitis, radicular cyst, or malignancies. The purpose of this report is to describe the characteristic radiographic features of eosinophilic granuloma of a 39-year-old male. The lesion in the anterior mandible was first diagnosed as radicular cyst because the radiographic findings were ovoid radiolucent lesion with well-defined border. However, careful interpretation revealed a non-corticated border and floating tooth appearance that were the characteristic radiographic features for the differential diagnosis. Early clinical signs of eosinophilic granuloma can occur in the jaw and a bony destructive lesion might be mistaken for periodontitis or an odontogenic cystic lesion; therefore, careful interpretation of radiographs should be emphasized.

  7. Methylation pattern of IFNG in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Campos, Kelma; Gomes, Carolina Cavaliéri; de Fátima Correia-Silva, Jeane; Farias, Lucyana Conceição; Fonseca-Silva, Thiago; Bernardes, Vanessa Fátima; Pereira, Cláudia Maria; Gomez, Ricardo Santiago

    2013-04-01

    Interferon-γ plays an important role in the pathogenesis of periapical lesions, and the methylation of IFNG has been associated with transcriptional inactivation. The purpose of the present study was to investigate IFNG promoter methylation in association with gene transcription and protein levels in periapical granulomas and radicular cysts. Methylation-specific polymerase chain reaction was used to assess the DNA methylation pattern of the IFNG gene in 16 periapical granulomas and 13 radicular cyst samples. The transcription levels of IFNG mRNA were verified by quantitative real-time polymerase chain reaction, and protein expression was evaluated by immunohistochemistry. All the periapical lesion samples exhibited partial or total methylation of the IFNG gene. In addition, an increased methylation profile was found in radicular cysts compared with periapical granulomas. Increased IFNG mRNA expression was observed in the partially methylated periapical lesion samples relative to the samples that were completely methylated. The present study provides the first evidence of the possible impact of IFNG methylation on IFNG transcription in periapical lesions. Copyright © 2013 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  8. Interacciones radiculares en sistemas agroforestales: mecanismos y opciones de manejo

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    F. Casanova

    2007-01-01

    Full Text Available Los sistemas agroforestales (SAF son una forma de uso de la tierra en donde las leñosas interactúan con los cultivos y/o animales, con la finalidad de diversificar y optimizar la producción de manera sostenida. Sin embargo, estos sistemas tienen limitantes originados por una combinación inadecuada de las diferentes especies, lo que resulta en competencia entre ellas. Las características radiculares de las especies leñosas tienen un papel importante en el éxito de los SAF, ya que indican modificaciones que pudieran existir entre especies asociadas. Por tanto, el objetivo de esta revisión es analizar la importancia de las interacciones radiculares, los criterios para el manejo con base en las características morfológicas y patrones de crecimiento entre especies y su impacto en los SAF. La incorporación de especies arbóreas dentro de los cultivos requiere de objetivos claros; es decir, conocer el papel que desempeñarían dentro del sistema. No es redituable utilizar especies arbóreas que no poseen cierto valor o producto, ya que la competencia entre los árboles y los cultivos es solamente admisible si es compensada a través de porlas ventajas con relación a los aumentos en la productividad de sistema. Son deseables aquellas especies arbóreas cuyas raíces sean agresivas con relación a los sistemas radiculares del cultivo asociado, y que manifiesten un crecimiento lateral profundo y/o posean una alta plasticidad. Una opción para reducir la competencia radicular es la regulación del espaciamiento y/o distribución de las diversas especies asociadas, así como la aplicación de prácticas de manejo. Los patrones de la actividad radicular de las plantas difieren entre especies, su conocimiento puede ayudar a evitar competencia excesiva y pérdidas de nutrientes en SAF con la asignación óptima del espacio y recursos disponibles.

  9. O conduto valvulado bovino contegra, um biomaterial para o tratamento cirúrgico de cardiopatias congênitas The contegra valved bovine conduit: a biomaterial for the surgical treatment of congenital heart defects

    Directory of Open Access Journals (Sweden)

    Shi-Min Yuan

    2012-01-01

    Full Text Available O Contegra, um enxerto de veia jugular bovina, tem sido amplamente utilizado como biomaterial de preferência no tratamento cirúrgico das cardiopatias congênitas, especialmente como um conduto para a reconstrução da via de saída ventricular direita. Este artigo tem como objetivo fazer uma revisão abrangente sobre os desfechos clínicos do Contegra. Foram recuperados, coletados e analisados, relatos de Contegra publicados desde 2002. Havia 1.718 Contegra, aplicados em 1.705 pacientes. Os tamanhos dos condutos foram de 8-22 mm. As idades dos pacientes foram de recém-nascidos até 74,5 anos, com prevalência de pacientes pediátricos. O diagnóstico primário foi cardiopatia congênita em todos os casos, sendo os três diagnósticos principais: tetralogia de Fallot, tronco arterioso e atresia pulmonar, que representaram 25,6%, 16,7% e 13,1%, respectivamente. O Contegra foi utilizado como enxerto tubular na posição pulmonar em 1635 (95,9% pacientes, como remendo monocúspide em 12 (0,7%, como enxerto na posição da valva pulmonar ou monocúspide em 40 (2,3%, e, como conduto artéria pulmonar-veia cava inferior na operação de Fontan, em 18 (1,1% pacientes, respectivamente. O reimplante de conduto foi realizado em 141 (8,3% pacientes, 33,8 ± 37 (8,6-106,8 meses após a inserção do conduto inicial. A plástica do conduto foi necessária em seis (0,4% e a reintervenção em 83 (4,9% dos pacientes. As indicações do reimplante do conduto incluíram estenose importante da anastomose distal, pseudoaneurisma da anastomose proximal e regurgitação importante do conduto. Quanto ao bom desempenho, disponibilidade e longevidade, o Contegra é um biomaterial adequado para a reconstrução da via de saída ventricular direita e como remendo para reparo de comunicação interventricular, mas não é apto para a operação de Fontan.Contegra, a bovine jugular vein graft, has been widely used as a preferable biomaterial in the surgical treatment of

  10. O conduto valvulado bovino contegra, um biomaterial para o tratamento cirúrgico de cardiopatias congênitas The contegra valved bovine conduit: a biomaterial for the surgical treatment of congenital heart defects

    Directory of Open Access Journals (Sweden)

    Shi-Min Yuan

    2012-12-01

    Full Text Available O Contegra, um enxerto de veia jugular bovina, tem sido amplamente utilizado como biomaterial de preferência no tratamento cirúrgico das cardiopatias congênitas, especialmente como um conduto para a reconstrução da via de saída ventricular direita. Este artigo tem como objetivo fazer uma revisão abrangente sobre os desfechos clínicos do Contegra. Foram recuperados, coletados e analisados, relatos de Contegra publicados desde 2002. Havia 1.718 Contegra, aplicados em 1.705 pacientes. Os tamanhos dos condutos foram de 8-22 mm. As idades dos pacientes foram de recém-nascidos até 74,5 anos, com prevalência de pacientes pediátricos. O diagnóstico primário foi cardiopatia congênita em todos os casos, sendo os três diagnósticos principais: tetralogia de Fallot, tronco arterioso e atresia pulmonar, que representaram 25,6%, 16,7% e 13,1%, respectivamente. O Contegra foi utilizado como enxerto tubular na posição pulmonar em 1635 (95,9% pacientes, como remendo monocúspide em 12 (0,7%, como enxerto na posição da valva pulmonar ou monocúspide em 40 (2,3%, e, como conduto artéria pulmonar-veia cava inferior na operação de Fontan, em 18 (1,1% pacientes, respectivamente. O reimplante de conduto foi realizado em 141 (8,3% pacientes, 33,8 ± 37 (8,6-106,8 meses após a inserção do conduto inicial. A plástica do conduto foi necessária em seis (0,4% e a reintervenção em 83 (4,9% dos pacientes. As indicações do reimplante do conduto incluíram estenose importante da anastomose distal, pseudoaneurisma da anastomose proximal e regurgitação importante do conduto. Quanto ao bom desempenho, disponibilidade e longevidade, o Contegra é um biomaterial adequado para a reconstrução da via de saída ventricular direita e como remendo para reparo de comunicação interventricular, mas não é apto para a operação de Fontan.Contegra, a bovine jugular vein graft, has been widely used as a preferable biomaterial in the surgical treatment of

  11. Macrophage polarization differs between apical granulomas, radicular cysts, and dentigerous cysts.

    Science.gov (United States)

    Weber, Manuel; Schlittenbauer, Tilo; Moebius, Patrick; Büttner-Herold, Maike; Ries, Jutta; Preidl, Raimund; Geppert, Carol-Immanuel; Neukam, Friedrich W; Wehrhan, Falk

    2018-01-01

    Apical periodontitis can appear clinically as apical granulomas or radicular cysts. There is evidence that immunologic factors are involved in the pathogenesis of both pathologies. In contrast to radicular cysts, the dentigerous cysts have a developmental origin. Macrophage polarization (M1 vs M2) is a main regulator of tissue homeostasis and differentiation. There are no studies comparing macrophage polarization in apical granulomas, radicular cysts, and dentigerous cysts. Forty-one apical granulomas, 23 radicular cysts, and 23 dentigerous cysts were analyzed in this study. A tissue microarray (TMA) of the 87 consecutive specimens was created, and CD68-, CD11c-, CD163-, and MRC1-positive macrophages were detected by immunohistochemical methods. TMAs were digitized, and the expression of macrophage markers was quantitatively assessed. Radicular cysts are characterized by M1 polarization of macrophages while apical granulomas show a significantly higher degree of M2 polarization. Dentigerous cysts have a significantly lower M1 polarization than both analyzed periapical lesions (apical granulomas and radicular cysts) and accordingly, a significantly higher M2 polarization than radicular cysts. Macrophage cell density in dentigerous cysts is significantly lower than in the periapical lesions. The development of apical periodontitis towards apical granulomas or radicular cysts might be directed by macrophage polarization. Radicular cyst formation is associated with an increased M1 polarization of infiltrating macrophages. In contrast to radicular cysts, dentigerous cysts are characterized by a low macrophage infiltration and a high degree of M2 polarization, possibly reflecting their developmental rather than inflammatory origin. As M1 polarization of macrophages is triggered by bacterial antigens, these results underline the need for sufficient bacterial clearance during endodontic treatment to prevent a possible M1 macrophage-derived stimulus for radicular cyst

  12. Operação de Rastelli utilizando-se conduto valvulado de pericárdio bovino: experiência inicial Rastelli operation with bovine pericardium valved conduit: early experience

    Directory of Open Access Journals (Sweden)

    Carlos R Moraes

    1988-08-01

    Full Text Available O presente trabalho descreve a experiência inicial com a operação de Rastelli, utilizando-se um conduto valvulado de pericárdio bovino preservado em glutaraldeído. O enxerto consta de um conduto, que serve para reconstruir a via de saída do ventrículo direito e o tronco pulmonar, com uma válvula tricúspide suturada em seu interior sem anel de suporte, permitindo, assim, um mecanismo de fluxo unidirecional. De maio de 1986 a outubro de 1987, 5 crianças foram submetidas à operação de Rastelli empregando-se este tipo de conduto valvulado. Três eram do sexo feminino e 2, do masculino, variando a idade de 1 a 8 anos x 5. Três pacientes tinham transposição das grandes artérias, comunicação interventricular (CIV e estenose subpulmonar. Uma criança era portadora de atresia pulmonar com CIV e de um shunt prévio tipo Waterston e, finalmente, a outra tinha um tronco arterial comum tipo II. Dois doentes faleceram de causas não relacionadas ao tipo de conduto valvulado utilizado. O conduto valvulado de pericárdio bovino preservado em glutaraldeído mostrou excelente flexibilidade, facilitando o manuseio cirúrgico e permitindo perfeita adaptabilidade dentro do saco pericárdico. A ausência de anel de suporte tem a vantagem de eliminar qualquer gradiente e de abolir o turbilhonamento do sangue - causas reconhecidas de calcificação.The present report describes the initial experience with the Rastelli operation utilizing a composite graft of glutaraldehyde preserved bovine pericardium. The graft is made up of a tube which serves to reconstruct the outflow tract of the right ventricle and the pulmonary artery, and an inner tricuspid valve, without a supporting ring, which provides the tube with a one-way flow mechanism. From May, 1986 to October, 1987, five children were submitted to Rastelli operation utilizing this valved tube. Three were female and two male, ranging in age from 1 e to 8 years (mean 5 years. Three had transposition

  13. Alimentos irradiados

    OpenAIRE

    Sendra, E.; Capellas, M.; Guamis, B.

    2001-01-01

    Not available

    La industria alimentaria y las administraciones públicas realizan grandes esfuerzos para mejorar el mantenimiento de las condiciones higiénicas y evitar la contaminación de alimentos. Pese a estos esfuerzos siguen produciéndose un gran numero de procesos patológicos relacionados con los alimentos. Las buenas prácticas higiénicas pueden reducir el nivel de contaminación, pero algunos microorganismos patógenos resulta imposible eliminarlos, especialmente de aque...

  14. Radicular cyst associated with deciduous molar: A report of a case with an unusual radiographic presentation

    Directory of Open Access Journals (Sweden)

    Sulabha A Narsapur

    2012-01-01

    Full Text Available Radicular cysts arising from deciduous teeth are rare. This article presents a case report of a radicular cyst associated with a mandibular deciduous second molar and with unusual radiographic findings. The second premolar was displaced to the lower border of the mandible, below the first premolar. The management comprised enucleation of the cystic sac under local anesthesia.

  15. Piezosurgery versus conventional surgery in radicular cyst enucleation.

    Science.gov (United States)

    Kocyigit, Ismail Doruk; Atil, Fethi; Alp, Yunus Emre; Tekin, Umut; Tuz, Hakan H

    2012-11-01

    This study compared the use of piezosurgery and conventional surgery in radicular cyst enucleation. The study was conducted with 29 patients who were radiologically and cytologically prediagnosed with radicular cysts in the jaw region. Nineteen patients were treated using piezosurgery, and 10 were treated using conventional surgical procedures. Surgical procedures were evaluated according to the following criteria: hemorrhage, soft-tissue damage, manipulation complexity, major perforation areas on the enucleated cyst tissue, and approximate operation duration. Patients were monitored postoperatively and evaluated for hemorrhaging at 24, 48, and 72 hours following surgery. Follow-up was conducted to check for recurrences and ranged from 5 to 24 months. No complications were observed in any of the 20 patients treated using piezosurgery, although the duration of surgery was longer than expected. Of the 10 patients treated using conventional methods, hemorrhaging that affected the operation occurred in 3 cases, perforation of the cyst epithelium and difficulties in enucleation occurred in 5 cases, postoperative hemorrhage occurred in 2 cases, and recurrence was observed in 2 cases. Piezosurgery may be considered effective in procedures such as enucleation that require sensitive manipulation, despite the increase in the length of the overall surgical procedure. Given the results of the present study and the current lack of information in the literature regarding postoperative pain, infection, and long-term success rates associated with the use of piezosurgery in cyst enucleation, further study in this area is recommended.

  16. Statistical Evaluation of Chronic Apical Periodontitis and Radicular Cysts

    Directory of Open Access Journals (Sweden)

    Baghaei-Naeini F

    2000-05-01

    Full Text Available Up to now, no complete study was carried out about the prevalence and location of periapical granuloma and radicular cysts from the point of view of clinical symptoms (e.g. pain and swelling fistula in Iran. The data was collected from the files available in the Department of Pathology, faculty of Dentistry, Tehran University of Medical Sciences. With a consideration on different therapeutic methods. a proper method was selected. Radicular cyst occurred in 59.3 percent of 324 cases while 45.7 percent were granuloma. The most common incidence of these lesions was in the range of 24-25 years old. The most common location of lesions was the maxillary anterior. Sinus tracts occurred in 74 of all cases. 47.3 percent of these patients have been previously received root canal therapy. It is noticeable that 24 percent of all patients were treated endodontically before surgery. Higher incidence of granuloma occurred in small lesions while cysts were more common in large lesions. 232 of all cases showed one of the clinical symptoms, 16% pain, 35.8% swelling and 22.8% fistula. No symptoms were found in 92 cases.

  17. Immunohistochemical Analysis of Galectins-1, -3, and -7 in Periapical Granulomas, Radicular Cysts, and Residual Radicular Cysts.

    Science.gov (United States)

    Brito, Lívia Natália Sales; de Lemos Almeida, Maria Manuela Rodrigues; de Souza, Lélia Batista; Alves, Pollianna Muniz; Nonaka, Cassiano Francisco Weege; Godoy, Gustavo Pina

    2018-05-01

    Galectins play important roles in immunoinflammatory responses, but their participation in the development of periapical lesions remains unclear. This study aimed to evaluate the expressions of galectins-1, -3, and -7 in periapical lesions, correlating them with the intensity of the inflammatory infiltrate and the pattern of the cystic epithelium. Twenty periapical granulomas (PGs), 20 radicular cysts (RCs), and 20 residual radicular cysts (RRCs) were submitted to immunohistochemistry using anti-galectin-1, -3, and -7 antibodies. The percentage of immunopositive cells in epithelial and connective tissues was determined. In connective tissue, PGs exhibited higher cytoplasmic/membrane expression of galectins-1 and -7 than RCs and RRCs (P  .05). In the epithelial component, a higher nuclear expression of galectin-7 was detected in RRCs (P cysts with hyperplastic epithelium (P cysts (P < .05). Galectins-1 and -7 may play important roles in the pathogenesis of PGs, RCs, and RRCs. On the other hand, the present results suggest only a minor involvement of galectin-3 in the development of these lesions. Copyright © 2018 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  18. Comparison of digital radiometric features between radicular cysts and periapical granulomas

    International Nuclear Information System (INIS)

    Jin, Yeon Hwa; Lee, Keon Il

    1999-01-01

    The purpose of this study was to investigate whether a radiometric analysis of radicular cysts and periapical granulomas is useful in the differential diagnosis. In this experiment, twenty-nine periapical radiographs of the radicular cyst and those periapical granuloma were used. The periapical radiography was taken by intraoral paralleling device. The X-ray film was digitized and digitally filtered to reduce film-grain noise. We estimated density difference of the inner/outer area, roundness or circularity, bone profile or scan line of the margin and cumulative percentage frequency curve of radicular cyst and periapical granuloma.The obtained results were as follows ; 1. The differences in density between ROIs of inner and outer area of radicular cysts were smaller than those of periapical granulomas.2. The equivalent circular diameter was over 6.3 mm, there was significant difference between periapical cyst and periapical granuloma.3. In differential diagnosis of radicular cyst and periapical granuloma using bone profile, sensitivity, spicificity and accuracy were considerably high (0.83, 0.86, 0.86) respectively.4. Cumulative percentage frequency curve of the radicular cyst was closer to the pseudo-pixel value of 50 than average curve, whereas periapical granuloma was closer to that of 0. Hence we conclude that digital radiometric features might be useful in the differential diagnosis between radicular cyst and periapical granuloma.

  19. Comparison of digital radiometric features between radicular cysts and periapical granulomas

    Energy Technology Data Exchange (ETDEWEB)

    Jin, Yeon Hwa; Lee, Keon Il [Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Wankwang University, Yongin (Korea, Republic of)

    1999-02-15

    The purpose of this study was to investigate whether a radiometric analysis of radicular cysts and periapical granulomas is useful in the differential diagnosis. In this experiment, twenty-nine periapical radiographs of the radicular cyst and those periapical granuloma were used. The periapical radiography was taken by intraoral paralleling device. The X-ray film was digitized and digitally filtered to reduce film-grain noise. We estimated density difference of the inner/outer area, roundness or circularity, bone profile or scan line of the margin and cumulative percentage frequency curve of radicular cyst and periapical granuloma.The obtained results were as follows ; 1. The differences in density between ROIs of inner and outer area of radicular cysts were smaller than those of periapical granulomas.2. The equivalent circular diameter was over 6.3 mm, there was significant difference between periapical cyst and periapical granuloma.3. In differential diagnosis of radicular cyst and periapical granuloma using bone profile, sensitivity, spicificity and accuracy were considerably high (0.83, 0.86, 0.86) respectively.4. Cumulative percentage frequency curve of the radicular cyst was closer to the pseudo-pixel value of 50 than average curve, whereas periapical granuloma was closer to that of 0. Hence we conclude that digital radiometric features might be useful in the differential diagnosis between radicular cyst and periapical granuloma.

  20. Schulze and Brand type a-IV dens invaginatus with radicular cyst: A rare case report

    Directory of Open Access Journals (Sweden)

    Rachita Chengappa

    2015-01-01

    Full Text Available Though a clinical examination may reveal a deep fissure or pit on the surface of an anterior tooth, radiographic examination is a more accurate approach to diagnose an invagination. Dens invaginatus is one of the common dental deformities, but the defect involving the root and its association with radicular cyst is still very uncommon. The objective of this case presentation is to report a case of radicular dens in dente, which is a rare dental anomaly. This case report shows that dens invaginatus with an open apex and a radicular cyst can be treated successfully using currently available materials.

  1. Tactile allodynia in patients with lumbar radicular pain (sciatica).

    Science.gov (United States)

    Defrin, Ruth; Devor, Marshall; Brill, Silviu

    2014-12-01

    We report a novel symptom in many patients with low back pain (LBP) that sheds new light on the underlying pain mechanism. By means of quantitative sensory testing, we compared patients with radicular LBP (sciatica), axial LBP (LBP without radiation into the leg), and healthy controls, searching for cutaneous allodynia in response to weak tactile and cooling stimuli on the leg and low back. Most patients with radicular pain (~60%) reported static and dynamic tactile allodynia, as well as cooling allodynia, on the leg, often extending into the foot. Some also reported allodynia on the low back. In axial LBP, allodynia was almost exclusively on the back. The degree of dynamic tactile allodynia correlated with the degree of background pain. The presence of allodynia suggests that the peripheral nerve generators of background leg and back pain have also induced central sensitization. The distal (foot) location of the allodynia in patients who have it indicates that the nociceptive drive that maintains the central sensitization arises paraspinally (ectopically) in injured ventral ramus afferents; this is not an instance of somatic referred pain. The presence of central sensitization also provides the first cogent account of shooting pain in sciatica as a wave of activity sweeping vectorially across the width of the sensitized dorsal horn. Finally, the results endorse leg allodynia as a pain biomarker in animal research on LBP, which is commonly used but has not been previously validated. In addition to informing the underlying mechanism of LBP, bedside mapping of allodynia might have practical implications for prognosis and treatment. How can you tell whether pain radiating into the leg in a patient with sciatica is neuropathic, ie, due to nerve injury? Copyright © 2014 International Association for the Study of Pain. Published by Elsevier B.V. All rights reserved.

  2. Organogênese do caquizeiro a partir de segmentos radiculares

    Directory of Open Access Journals (Sweden)

    Carvalho Dayse Cristina de

    2004-01-01

    Full Text Available A produção de mudas de caquizeiro (Diospyros kaki pelo processo da enxertia sobre porta-enxertos provenientes de sementes, ocasiona problemas de desuniformidade vegetativa. O objetivo do trabalho foi contribuir para o desenvolvimento de um protocolo para a regeneração de brotações de caquizeiro do tipo café, a partir de raízes por organogênese indireta. Segmentos radiculares obtidos de embriões germinados in vitro foram isolados de sementes de frutos maduros em meio MSfraction one-halfNO3. As sementes receberam assepsia pela imersão em etanol 70% por um minuto, em solução de hipoclorito de sódio 2,5% por 20 minutos e quatro lavagens em água esterilizada. No primeiro experimento, os segmentos radiculares de 2cm foram isolados em meio de cultura MSfraction one-halfNO3 acrescido de 0,01mM de ácido indolacético e quatro tipos de citocininas nas concentrações 1 e 10mM: zeatina, 6-benzilaminopurina, 2-isopenteniladenina e thidiazuron. No segundo experimento, para o enraizamento das brotações, foram testados quatro períodos de permanência em meio com 10mM de ácido indolbutírico: 0, 5 10 e 15 dias. A maior regeneração de brotos (1,2 brotos por explante ocorreu na combinação 1mM de zeatina com 0,01mM de ácido indolacético. As brotações juvenis obtidas possuem potencial natural para o enraizamento, sendo necessário novos estudos para confirmar o efeito da aplicação de auxinas.

  3. Management of a large radicular cyst: A non-surgical endodontic approach

    Directory of Open Access Journals (Sweden)

    Shweta Dwivedi

    2014-01-01

    Full Text Available A radicular cyst arises from epithelial remnants stimulated to proliferate by an inflammatory process originating from pulpal necrosis of a non-vital tooth. Radiographically, the classical description of the lesion is a round or oval, well-circumscribed radiolucent image involving the apex of the tooth. A radicular cyst is usually sterile unless it is secondarily infected. This paper presents a case report of conservative non-surgical management of a radicular cyst associated with permanent maxillary right central incisor, right lateral incisor and right canine in a 24-year-old female patient. Root canal treatment was done together with cystic aspiration of the lesion. The lesion was periodically followed up and significant bone formation was seen at the periapical region of affected teeth and at the palate at about 9 months. Thus, nonsurgical healing of a large radicular cyst with palatal swelling provided favorable clinical and radiographic response.

  4. Conservative Approach in the Management of Radicular Cyst in a Child: Case Report

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    Narendra Varma Penumatsa

    2013-01-01

    Full Text Available Radicular cyst is the most common odontogenic cystic lesion of inflammatory origin. It is also known as periapical cyst, apical periodontal cyst, root end cyst, or dental cyst. It arises from epithelial residues in the periodontal ligament as a result of inflammation. The inflammation usually follows the death of dental pulp. This paper presents a case report of a patient with radicular cyst associated with a primary molar.

  5. Ameloblastomatous Change in Radicular Cyst of The Jaw in a Nigerian Population.

    Science.gov (United States)

    Omoregie, F O; Sede, M A; Ojo, A M

    2015-06-01

    To determine the incidence, age, gender, jaw-sites and subtypes of radicular cyst, and to determine the incidence of ameloblastomatous change in radicular cyst in a Nigerian population. A 10-year retrospective analysis of all diagnosed orofacial lesions in the Department of Oral Pathology and Medicine, University of Benin Teaching Hospital, Benin City, Nigeria. From the 785 diagnosed orofacial lesions within the study period; there were 54 (6.9%) cases of radicular cysts of the jaws. The peak age group was the 3(rd) decade (n=23, 42.6%) with a mean age of 31 ± 1.7 years. There were 29 (53.7%) males and 25 (46.3%) females, giving a ratio of 1.2:1. The mandible was the commonest jaw-site (n=32, 59.3%). There were 12 (22.2%) cases of periapical cyst which were significantly associated with anterior maxillary site (n=8, 14.8%) [p=0.001]. Seven (13.0%) cases of cystic ameloblastoma were diagnosed among the radicular cysts, with a predilection of the lesions for 3(rd) and 4(th) decades of life (n=6, 11.1%), and posterior mandible (n=5, 9.3%). This study showed a low incidence of radicular cyst of the jaw among orofacial lesions and a relatively higher incidence of ameloblastomatous change in radicular cyst compared to previous reports. Immuno-histochemical examination is recommended to differentiate radicular cyst with ameloblastomatous-like change from cystic ameloblastoma arising from radicular cyst.

  6. Cardiovascular and lifestyle risk factors in lumbar radicular pain or clinically defined sciatica: a systematic review

    Science.gov (United States)

    Karppinen, Jaro; Leino-Arjas, Päivi; Solovieva, Svetlana; Varonen, Helena; Kalso, Eija; Ukkola, Olavi; Viikari-Juntura, Eira

    2007-01-01

    Lumbar radicular pain is a fairly common health problem, yet its risk factors are far from clear. There are no published systematic reviews on associations between cardiovascular or lifestyle risk factors and lumbar radicular pain or sciatica. The aim of this systematic literature review was to assess associations between these risk factors and lumbar radicular pain or sciatica. We conducted a systematic search of the Medline database for all original articles on lumbar radicular pain or sciatica published until August 2006. Twenty-two papers from 19 studies were included in the review. Overweight or obesity was associated with sciatica in most of the case-control and cohort studies. Some studies showed an increased risk of lumbar radicular pain in smokers with a long smoking history or in those with high levels of physical activity. A few case-control studies showed an association between serum C-reactive protein and sciatica. No consistent associations were found for serum lipids levels or high blood pressure. In summary, the associations of overweight, long smoking history, high physical activity and a high serum C-reactive protein level with lumbar radicular pain or sciatica were substantiated by the present review. However, more prospective studies are needed in order to further clarify these associations and the mechanisms of action. PMID:17525856

  7. Radicular Cyst With Actinomycotic Infection in an Upper Anterior Tooth

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    Shuei-Kuen Tseng

    2009-10-01

    Full Text Available Actinomycosis is an infection caused by filamentous, branching, Gram-positive anaerobic bacteria. It rarely infects the jawbone. This case report describes a patient with a left maxillary central incisor with an apical lesion and actinomycotic infection. A 23-year-old male patient underwent conventional root canal treatment of tooth 21, in a local dental clinic for about 1 year. However, percussion pain and a sinus tract that originated from tooth 21 were still present after treatment. Nonsurgical root canal treatment of tooth 21 was performed again but failed to relieve the symptoms. Therefore, apicoectomy and retrograde filling of the apical root canal with mineral trioxide aggregate were carried out. Periradicular bony defect was grafted by biocompatible material, and postoperative antibiotics (250 mg amoxicillin were given three times daily for 5 days. Pathological examination of the removed periapical tissue showed a radicular cyst with actinomycosis. At the 9-month postoperative recall, the sinus tract had disappeared and radiographic examination showed healing of the apical lesion. Periradicular actinomycosis is one important reason for failure of nonsurgical endodontic treatment. Clinically, if the tooth shows a recurrent sinus tract and poor response to conventional root canal treatment combined with antibiotic control, apical actinomycotic infection should be highly suspected, and an alternative endodontic surgical approach is needed for successful treatment.

  8. Heparanase expression in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Elad, S; Sherman, Y; Palmon, A; Vlodavsky, I; Or, R

    2013-01-01

    Heparanase is an endo-β-D-glucuronidase enzyme which degrades heparan sulfate glycosaminoglycan side chains of proteoglycans in the extracellular matrix and in basement membranes. The aim of this study was to evaluate the expression of heparanase in periapical granulomas (PGs) and radicular cysts (RCs). Immunohistochemistry was used to assess heparanase expression in PGs and RCs. Parameters including stain intensity, location and cell type were used to characterize heparanase expression in the periapical lesions. Ordered categories (from weak to strong) were used to compare the level of heparanase staining in the PG and RC groups. Both epithelial cells and inflammatory cells were positive for heparanase. The relative staining of the epithelial cells was strong, whereas the relative staining of the inflammatory cells was weak. Significant differences in immunohistochemical staining of epithelial cells were observed between RCs and PGs (p = 0.002). The relative expression of heparanase in epithelial cells in RCs was strong. In PGs, lesions with few or no epithelial cells, heparanase was predominantly expressed weakly by inflammatory cells. PGs and RCs have the same infectious origin. Therefore, the different cellular sources of heparanase in these periapical lesions may imply that this enzyme has specific pathogenetic functions in RCs and PGs.

  9. Digital radiography density measurements in differentiation between periapical granulomas and radicular cysts.

    Science.gov (United States)

    Rózyło-Kalinowska, Ingrid

    2007-05-01

    The distinction between radicular cysts and apical granulomas is a matter of considerable importance in making a treatment decision. Because there are no clearly defined radiographic criteria, the distinction is made on the grounds of size. However, it has been suggested that cysts can be distinguished from granulomas on the basis of their radiometric density. The results of previous studies have proved conflicting. To determine possibilities of application of digital radiography density measurements in differentiation of periapical granulomas and radicular cysts of inflammatory origin. The material consisted of 355 digital periapical radiograms obtained using Digora, RVG and Dixi 2 digital radiography systems in patients aged 20 to 84, divided into two groups: 259 granulomas and 102 radicular cysts. By means of Digora 2.0 software there were measured maximum and minimum densities along a line, then there was calculated the difference between maximum and minimum density. The largest dimensions of the lesions were measured - perpendicular and parallel to the root canal axis. It was proved that to some extent it was possible to differentiate cystic granulomas and radicular cysts on the basis of the difference between maximum and minimum density in linear measurement - when the difference exceeded 85.6 the lesion was a cyst and when it was below 45.9 a granuloma was diagnosed. Combination of two criteria - the calculated difference between densities and the largest dimension of a lesion, increased diagnostic possibilities of radiological differentiation of granulomas and radicular cysts.

  10. Palatal radicular groove: Clinical implications of early diagnosis and surgical sealing

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    P Corrêa-Faria

    2011-01-01

    Full Text Available Palatal radicular groove is a discreet alteration in tooth morphology, characterized by an invagination that begins near the cingulum of the tooth and moves in an apical direction. Clinically, palatal radicular groove may be associated with periodontal and/or endodontic problems. This paper describes a clinical case of a young patient with palatal radicular groove with no signs of periodontal disease or endodontic impairment. An early diagnosis was made and treatment consisted of surgical sealing of the defect. After a 2-year period, reexaminations demonstrated adequate hygiene, maintenance of tooth vitality and periodontal health. The early diagnosis and sealing of the groove observed surgically made the root surface smooth, avoiding subgingival bacterial plaque buildup, and preventing possible periodontal and/or pulp impairment stemming from the defect.

  11. Modulación del sistema radicular en condiciones de estrés

    OpenAIRE

    Silva Navas, Javier

    2016-01-01

    Durante su evolución, las plantas han adquirido un desarrollo post-embrionario que juega un papel esencial en su adaptación al ambiente. Durante dicha adaptación, la modulación del crecimiento y desarrollo del sistema radicular juegan un papel clave en el éxito reproductivo, o en otras palabras, la productividad agrícola. Por lo tanto, la obtención de sistemas radiculares más eficientes, es considerada como una de las mejores opciones biotecnológicas para incrementar la producción agrícola. E...

  12. Immunoexpression of interleukin 17, transforming growth factor β1, and forkhead box P3 in periapical granulomas, radicular cysts, and residual radicular cysts.

    Science.gov (United States)

    Andrade, Ana Luiza Dias Leite de; Nonaka, Cassiano Francisco Weege; Gordón-Núñez, Manuel Antonio; Freitas, Roseana de Almeida; Galvão, Hébel Cavalcanti

    2013-08-01

    Different cell types and cytokines have been identified as contributors to the formation of periapical lesions. In this perspective, this study aimed to evaluate the immunoexpression of interleukin (IL)-17, transforming growth factor (TGF)-β1, and the forkhead box P3 (FoxP3) in periapical lesions, correlating them with the type of lesion, the intensity of the inflammatory infiltrate, and the thickness of the cystic epithelial lining. Twenty periapical granulomas (PGs), 20 radicular cysts (RCs), and 20 residual radicular cysts (RRCs) were submitted to immunohistochemical analysis using anti-IL-17, anti-TGF-β1, and anti-FoxP3 antibodies. In comparison with PGs and RCs, RRCs exhibited a lower immunoexpression of IL-17 and TGF-β1 (P = .021 and P periapical lesions. Copyright © 2013 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  13. Neurosurgeons' management of lumbosacral radicular syndrome evaluated against a clinical guideline

    NARCIS (Netherlands)

    P.A.J. Luijsterburg (Pim); A.P. Verhagen (Arianne); S. Braak (Sigrid); A. Oemraw (Anushka); C.J.J. Avezaat (Cees); B.W. Koes (Bart)

    2004-01-01

    textabstractTo establish to what extent neurosurgeons subscribe to the lumbosacral radicular syndrome (LRS) guideline, and to evaluate their current management of patients with LRS against the guideline. All active neurosurgeons in the Netherlands (n=92) were mailed a questionnaire about the

  14. Human radicular veins : regulation of venous reflux in the absence of valves

    NARCIS (Netherlands)

    van der Kuip, M; Hoogland, P V; Groen, R J

    1999-01-01

    In the literature it is generally assumed that venous reflux within the radicular veins is prevented by the presence of bicuspid valves and narrowing of the transdural part of these vessels. Recently, we performed a human cadaver study of the internal vertebral venous plexus. Surprisingly, a large

  15. A Randomized Controlled Trial Evaluating the Effects of Diosmin in the Treatment of Radicular Pain

    Directory of Open Access Journals (Sweden)

    Yinhe Wang

    2017-01-01

    Full Text Available Diosmin has been widely used to treat patients with vascular pain for its potent anti-inflammatory and analgesic effects. To evaluate the therapeutic effects of Diosmin in the treatment of radicular pain, we conducted an investigator-initiated, randomized, active-controlled noninferiority trial between January 1, 2009, and December 1, 2010. Diosmin (50 mg/kg/day was orally administered to treat the radicular pain in 150 patients for one month. Another 150 patients with the same symptom were given 20% 250 ml mannitol (1 g/kg/day for 7 days and dexamethasone (10 mg/day for 3 days intravenously guttae. Short-term relief and long-term relief were measured. Secondary outcomes include improvement in functional and psychological status, return to work, and reduction in anti-inflammatory analgesic drugs intake. Patients treated with oral Diosmin achieved reduction in radicular pain. The total satisfaction rate of Diosmin group was 84.7% [95% confidence interval (CI: 77.9%, 90.0%], and the complete satisfaction rate was 50.7% (95% CI: 42.4%, 58.9%. No statistically significant difference was found between the Diosmin group and the active-control group regarding patient satisfaction. No adverse effects were found during the study period. Our study suggests that clinical application of Diosmin with a dose of 50 mg/kg/day might reduce the radicular pain. This trial is registered with ISRCTN97157037.

  16. Reabsorción radicular inflamatoria en sujetos con tratamiento ortodóntico. Cartagena (Colombia

    Directory of Open Access Journals (Sweden)

    Farith González Martínez

    2012-01-01

    Full Text Available Objetivo: Determinar la ocurrencia de Reabsorción Radicular Inflamatoria en sujetos sometidos a movimiento dental con cuatro técnicas de ortodoncia. Materiales y métodos: Estudio de cohorte con seguimiento a un año, evaluando la reabsorción radicular inflamatoria con cuatro técnicas de ortodoncia, a partir de la escala de Levander and Malmgren. Las mediciones se realizaron en 176 dientes, usando tres radiografías periapicales por participante cada tres meses. Los datos fueron analizados a través de proporciones de incidencia. El Riesgo Relativo se utilizó para la asociación entre la presencia de reabsorción y la técnica de ortodoncia, con intervalos de confianza del 95 %. Para la significancia estadística se aplicaron los test de Kruskal Wallis, Mc-Nemar y Fischer. Se realizó un análisis multivariable por regresión logística. Resultados: La incidencia de Reabsorción Radicular fue del 68,2 %, presentándose a los nueve y doce meses. Se observaron cambios radiculares con grado 1 en 8,5 % de los dientes y grado 2 con 2,8 %, siendo laterales los de mayor proporción (6,3%. En los dientes sometidos a la técnica de Arco de canto se encontró un riesgo 3,3 veces mayor en comparación con las técnicas pre-ajustadas. Conclusiones: Existe Reabsorción Radicular en los dientes sometidos a movimiento dental durante el tratamiento de ortodoncia, sin embargo, estos cambios se consideran leves y dependen de la biomecánica utilizada en cada técnica.

  17. Alteração da temperatura radicular externa durante o preparo para contenção intra-radicular

    Directory of Open Access Journals (Sweden)

    FERREIRA Cláudio Maníglia

    1999-01-01

    Full Text Available O objetivo deste trabalho foi comparar in vitro a alteração de temperatura na superfície radicular externa durante o preparo para contenção intra-radicular utilizando 4 técnicas de remoção da guta-percha: condensadores aquecidos, brocas de Peeso, Gates-Glidden e Largo, em 40 dentes pré-molares inferiores (unirradiculares tratados endodonticamente. O experimento foi realizado em uma câmara com temperatura controlada em torno de 26°C. Para a remoção da guta-percha do interior dos canais, foram calculados dois terços do comprimento da raiz, deixando em torno de 4 mm de obturação apical. As medições da temperatura radicular externa foram realizadas com um termopar acoplado a um multímetro e efetuadas em 3 regiões: cervical (em torno de 3 mm abaixo da junção cemento-esmalte, média e apical. A análise de variância indicou diferenças significantes (p < 0,01 entre as regiões e as técnicas utilizadas. O teste complementar de Tukey indicou que os condensadores aquecidos produziram o maior aumento de temperatura dentre as técnicas, e a broca de Peeso dentre as brocas, seguida pela de Largo e de Gates-Glidden. Dentre as regiões, a apical apresentou a maior alteração de temperatura em todas as técnicas avaliadas.

  18. Early Postoperative Magnetic Resonance Imaging in Detecting Radicular Pain After Lumbar Decompression Surgery: Retrospective Study of the Relationship Between Dural Sac Cross-sectional Area and Postoperative Radicular Pain.

    Science.gov (United States)

    Futatsugi, Toshimasa; Takahashi, Jun; Oba, Hiroki; Ikegami, Shota; Mogami, Yuji; Shibata, Syunichi; Ohji, Yoshihito; Tanikawa, Hirotaka; Kato, Hiroyuki

    2017-07-01

    A retrospective analysis. To evaluate the association between early postoperative dural sac cross-sectional area (DCSA) and radicular pain. The correlation between postoperative magnetic resonance imaging (MRI) findings and postoperative neurological symptoms after lumbar decompression surgery is controversial. This study included 115 patients who underwent lumbar decompression surgery followed by MRI within 7 days postoperatively. There were 46 patients with early postoperative radicular pain, regardless of whether the pain was mild or similar to that before surgery. The intervertebral level with the smallest DCSA was identified on MRI and compared preoperatively and postoperatively. Risk factors for postoperative radicular pain were determined using univariate and multivariate analyses. Subanalysis according to absence/presence of a residual suction drain also was performed. Multivariate regression analysis showed that smaller postoperative DCSA was significantly associated with early postoperative radicular pain (per -10 mm; odds ratio, 1.26). The best cutoff value for radicular pain was early postoperative DCSA of 67.7 mm. Even with a cutoff value of surgery. The best cutoff value for postoperative radicular pain was 67.7 mm. Absence of a suction drain at the time of early postoperative MRI was related to smaller DCSA.

  19. Effects of neural mobilization on pain, straight leg raise test and disability in patients with radicular low back pain

    OpenAIRE

    Haris Čolaković; Dijana Avdić

    2013-01-01

    Introduction: Radicular low back pain is a disorder involving the dysfunction of the lumbosacral nerve roots. Clinical rehabilitation approaches for low back pain include kinesiotherapy, and physical therapyprocedures: ice , rest , heat, ultrasound, TENS, but evidences regarding their effectiveness are lacking. The purpose of this study was to determine if nerve mobilization brings better improvements in pain, SLR testand functional disability in patients with radicular low back pain compared...

  20. Immunoexpression of tryptase-positive mast cells in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Costa Neto, H; de Andrade, A L D L; Gordón-Núñez, M A; Freitas, R de A; Galvão, H C

    2015-08-01

    To evaluate and compare the immunoexpression of tryptase in samples of periapical granulomas (PGs) and radicular cysts (RCs) correlating it with the type of lesion, localization, intensity of the inflammatory infiltrate and thickness of the cystic epithelial lining, in order to gain insight into the phlogistic role of these cells in the lesions studied. Twenty-five PGs and twenty-five RCs obtained from human teeth without endodontic treatment were submitted to morphological and immunohistochemical analysis using anti-tryptase antibody. Mast cells were identified and counted in three regions: intra-epithelial, central/superficial and deep portions. The data were analysed using the Mann-Whitney U-test (P periapical lesions in a larger number in periapical granulomas than in radicular cysts, in both central/superficial and deep regions. © 2014 International Endodontic Journal. Published by John Wiley & Sons Ltd.

  1. A clinical report demonstrating the significance of distinguishing a nasopalatine duct cyst from a radicular cyst

    Science.gov (United States)

    Aparna, Manikkath; Chakravarthy, Arumugam; Acharya, Shashi Rashmi; Radhakrishnan, Raghu

    2014-01-01

    Endodontic diagnosis is challenging and depends on the organisation of information from the patient history, clinical examination and analysis of the pulp, radiographic and histopathological assessment. A 35-year-old man was endodontically treated for radiolucency in relation to the roots of maxillary central incisors as it was a provisionally diagnosed case of radicular cyst. Since the palatal swelling persisted, the lesion was re-evaluated using relevant diagnostic aids and a diagnosis of nasopalatine duct cyst (NPDC) was made, which was missed during the initial assessment. An erroneous interpretation of cystic radiolucency in relation to maxillary central incisors can often lead to inappropriate treatment planning. This case highlights the relevant aspects in the diagnosis of NPDC when it is mistaken for a radicular cyst and emphasises the need for thorough clinical examination and relevant investigations for periapical radiolucencies of questionable origin before initiating endodontic therapy. PMID:24642171

  2. Development of a patient-reported outcome instrument for patients with lumbar radicular pain

    OpenAIRE

    Ibsen, Charlotte; Schiøttz-Christensen, Berit; Handberg, Charlotte; Nielsen, Claus Vinther; Hørder, Mogens; Maribo, Thomas

    2017-01-01

    Background Low back pain (LBP) is the leading cause to years lived with disability. 10–20% of patients with LBP experience radicular pain (lumbar radiculopathy). Patient-reported outcomes (PROs) play an important role in advancing patient-centered health care. Although patient involvement is essential to develop valid patient-centred PRO instruments patients are not always involved. The International Classification of Functioning, Disability and Health (ICF) are proposed to facilitate consist...

  3. The effect of endodontic regeneration medicaments on mechanical properties of radicular dentin

    Science.gov (United States)

    Yassen, Ghaeth H.

    Endodontic regeneration treatment of necrotic immature teeth has gained popularity in recent years. The approach suggests a biological alternative to induce a continuous root development. In this project, three in vitro experiments were conducted to investigate the effect of three medicaments used in endodontic regeneration on mechanical properties and chemical structure of radicular dentin. In the first experiment, we investigated longitudinally the effect of medicaments on the indentation properties of the root canal surface of immature teeth using a novel BioDent reference point indenter. A significant difference in the majority of indentation parameters between all groups was found after one-week and one-month application of medicaments (p double antibiotic paste (DAP) > control > calcium hydroxide [Ca(OH)2]. The four-week exposure of dentin to TAP and DAP caused 43% and 31% increase in total indentation distance outcome, respectively. In the second experiment, we investigated longitudinally the effect of medicaments on the chemical structure of immature radicular dentin by measuring the phosphate/amide I ratios of dentin using Attenuated Total Reflection Fourier Transform Infrared Spectroscopy. Phosphate/amide I ratios were significantly different between the four groups after one week, two weeks and four week application of medicaments (p untreated dentin > DAP-treated dentin > TAP-treated dentin. In the third experiment, we investigated longitudinally the effect of medicaments on root fracture resistance and microhardness of radicular dentin. For the microhardness, the two-way interaction between group and time was significant (pmedicaments caused significant decrease in fracture resistance ranging between 19%-30% after three month application compared to one week application. The three medicaments used in endodontic regeneration caused significant change in the chemical integrity of the superficial radicular dentin and significantly affected the indentation

  4. Expression of interleukin-33 and its receptor ST2 in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Velickovic, Milena; Pejnovic, Nada; Petrovic, Renata; Mitrovic, Slobodanka; Jeftic, Ilija; Kanjevac, Tatjana; Lukic, Aleksandra

    2016-01-01

    Interleukin-33 (IL-33) is a recently identified cytokine belonging to the IL-1 family and ligand for the IL-1 receptor-related protein ST2. IL-33/ST2 signaling plays a critical role in allergy, autoimmunity, and chronic inflammatory disorders, but its role in the pathogenesis of periapical lesions is unknown. We aimed to investigate the expression patterns of IL-33 and ST2 in human periapical lesions. Periapical lesions (n = 36) and healthy periapical tissues (n = 10) were evaluated by immunohistochemistry using antibodies specific for human IL-33 and ST2. Lesion samples were further analyzed by double immunofluorescence to assess IL-33/ST2 co-expression. The numbers of IL-33- and ST2-positive fibroblasts were significantly higher in periapical lesions compared to healthy periapical tissues (both P 0.05). There were no significant differences in the numbers of IL-33- and ST2-positive fibroblasts and endothelial cells between periapical granulomas and radicular cysts (all P > 0.05). Similarly, numbers of ST2-positive mononuclear cells did not differ between periapical granulomas and radicular cysts (P > 0.05). The majority of epithelial cells in radicular cysts were IL-33 positive, while the small proportion of epithelial cells was ST2 positive. Double immunofluorescence analysis revealed IL-33/ST2 co-expression in fibroblasts and endothelial cells. IL-33 and ST2 are expressed in periapical granulomas and radicular cysts. Increased numbers of IL-33- and ST2-positive fibroblasts in periapical lesions when compared to healthy periapical tissues suggest that IL-33/ST2 signaling may be involved in periapical inflammation and tissue fibrosis. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  5. Quantitative analysis of the epithelial lining architecture in radicular cysts and odontogenic keratocysts

    Directory of Open Access Journals (Sweden)

    Landini Gabriel

    2006-02-01

    Full Text Available Abstract Background This paper describes a quantitative analysis of the cyst lining architecture in radicular cysts (of inflammatory aetiology and odontogenic keratocysts (thought to be developmental or neoplastic including its 2 counterparts: solitary and associated with the Basal Cell Naevus Syndrome (BCNS. Methods Epithelial linings from 150 images (from 9 radicular cysts, 13 solitary keratocysts and 8 BCNS keratocysts were segmented into theoretical cells using a semi-automated partition based on the intensity of the haematoxylin stain which defined exclusive areas relative to each detected nucleus. Various morphometrical parameters were extracted from these "cells" and epithelial layer membership was computed using a systematic clustering routine. Results Statistically significant differences were observed across the 3 cyst types both at the morphological and architectural levels of the lining. Case-wise discrimination between radicular cysts and keratocyst was highly accurate (with an error of just 3.3%. However, the odontogenic keratocyst subtypes could not be reliably separated into the original classes, achieving discrimination rates slightly above random allocations (60%. Conclusion The methodology presented is able to provide new measures of epithelial architecture and may help to characterise and compare tissue spatial organisation as well as provide useful procedures for automating certain aspects of histopathological diagnosis.

  6. Comparison of Morphine and Tramadol in Transforaminal Epidural Injections for Lumbar Radicular Pain

    Science.gov (United States)

    2013-01-01

    Background Transforaminal epidural steroid injections are known to reduce inflammation by inhibiting synthesis of various proinflammatory mediators and have been used increasingly. The anti-inflammatory properties of opioids are not as fully understood but apparently involve antagonism sensory neuron excitability and pro-inflammatory neuropeptide release. To date, no studies have addressed the efficacy of transforaminal epidural morphine in patients with radicular pain, and none have directly compared morphine with a tramadol for this indication. The aim of this study was to compare morphine and tramadol analgesia when administered via epidural injection to patients with lumbar radicular pain. Methods A total of 59 patients were randomly allocated to 1 of 2 treatment groups and followed for 3 months after procedure. Each patient was subjected to C-arm guided transforaminal epidural injection (TFEI) of an affected nerve root. As assigned, patients received either morphine sulfate (2.5 mg/2.5 ml) or tramadol (25 mg/0.5 ml) in combination with 0.2% ropivacaine (1 ml). Using numeric rating scale was subsequently rates at 2 weeks and 3 months following injection for comparison with baseline. Results Both groups had significantly lower mean pain scores at 2 weeks and at 3 months after treatment, but outcomes did not differ significantly between groups. Conclusions TFEI of an opioid plus local anesthetic proved effective in treating radicular pain. Although morphine surpassed tramadol in pain relief scores, the difference was not statistically significant. PMID:23862000

  7. Frequencies of different peripheral nervous system pathologies among Cases of Lumbar Radicular Pain using Electrodiagnostic Studies

    International Nuclear Information System (INIS)

    Ayaz, S.; Waheed, A.; Ali, L.

    2014-01-01

    Objective: to discover the spectrum of diagnoses on nerve conduction studies/ Electromyography in patients with lumbar radicular pain, test preponderance of the commonest pathology and correlate commonest pathology with age > 50 years, gender and unilateral involvement. Study design: A descriptive cross-sectional study of 539 patients. Place and Duration of the study: the department of Electrodiagnostic studies, Armed Forces Institute of Rehabilitation Medicine, Rawalpindi from January 2012 to December 2012. Material and methods: using non-probability consecutive sampling 539 patients referred with complaints of lumbar radicular pain were subjected to electrodiagnostic evaluation for presence of lumbosacral radiculopathy, polyneuropathy, sciatic nerve injury or a combination of these. The preponderance of commonest pathology was tested statistically. The frequencies were then related statistically to age > 50 years, gender and unilateral or bilateral involvement. Result: A total of 539 patients (age:18-85 years) were registered. 355 (66% ) were males and 261 (48.4%) patients were > 50 years. Nerve conduction studies/Electromyography findings were abnormal in 386 (77.6%) patients. The commonest diagnosis was lumbosacral radiculopathy in 65% followed by polyneuropathy with superimposed lumbosacral radiculopathy in 7%. The preponderance of lumbosacral radiculopathy was statistically found significant (p 50 years. Conclusion: Lumbosacral radiculopathy is highly expected to be found on nerve conduction studies /electromyography in patients who present with lumbar radicular pain. The lumbosacral radiculopathy is more common in individuals of age 50 years and above. (author)

  8. Distinct Th1, Th2 and Treg cytokines balance in chronic periapical granulomas and radicular cysts.

    Science.gov (United States)

    Teixeira-Salum, Tatiana Beber; Rodrigues, Denise Bertulucci Rocha; Gervásio, Aurélia M; Souza, Cássio J A; Rodrigues, Virmondes; Loyola, Adriano Motta

    2010-03-01

    Periapical lesions are a host response that involves immune reaction to prevent dissemination of bacteria from an infected root canal. The purpose of this study was to evaluate the levels of nitric oxide (NO), IL-4, TGF-beta, tumor necrosis factor-alpha (TNF-alpha), and interferon-gamma (IFN-gamma) in chronic periapical lesions and to determine their possible association with clinical and radiographic parameters. Seventeen human radicular cysts and 30 periapical granulomas were used in this study. Cytokines and NO were assessed by enzyme-linked immunosorbent assay and by the Griess reaction respectively confirmed by immunohistochemical. TNF-alpha and IFN-gamma were detected in 10% of granulomas and in 41.2% and 70% of radicular cysts. IL-4 was reactive in 24% of cysts, and TGF-beta was positive in all samples. Patients with tenderness showed significantly higher levels of IFN-gamma and IL-4 (P Periapical granulomas display a regulatory environment characterized by high TGF-beta and low inflammatory cytokine levels, while radicular cysts has mist Th1 and Th2 inflammatory reaction with the presence of IFN-gamma, TNF-alpha, and IL-4.

  9. Th1 and Th2-like protein balance in human inflammatory radicular cysts and periapical granulomas.

    Science.gov (United States)

    de Carvalho Fraga, Carlos Alberto; Alves, Lucas Rodrigues; de Sousa, Adriana Alkmim; de Jesus, Sabrina Ferreira; Vilela, Daniel Nogueira; Pereira, Camila Santos; Batista Domingos, Patrícia Luciana; Viana, Agostinho Gonçalves; Jham, Bruno Correia; Batista de Paula, Alfredo Maurício; Sena Guimarães, André Luiz

    2013-04-01

    Chronic dental periapical lesions result from chronic inflammation of periapical tissues caused by continuous antigenic stimulation from infected root canals. Recent findings have suggested that T helper (Th) 1 and Th2-like cytokines are important in the pathogenesis of chronic periapical inflammatory diseases. However, the mechanisms regulating these immunoinflammatory pathways have not been fully elucidated. Thus, the aim of this study was to evaluate interleukin (IL)-4, IL-12, and interferon γ (IFN-γ) protein levels in human radicular cysts and periapical granulomas. Archived samples of cysts (n = 52) and granulomas (n = 27) were sectioned and submitted to immunohistochemistry to evaluate the tissue expression of IL-4, IL-12, and IFN-γ. The data were analyzed using the Mann-Whitney U test (P cysts. IL-4 expression was stronger in periapical granulomas than in radicular cysts. IL-12 was not detected in any of the samples. Our study showed that IFN-γ protein levels are increased in radicular cysts, whereas IL-4 expression is stronger in samples of periapical granulomas. Further studies are necessary to elucidate the signaling pathways mediated by these cytokines and to facilitate the development of more effective periapical disease management strategies. Copyright © 2013 American Association of Endodontists. All rights reserved.

  10. CT-guided periradicular therapy in cervical and lumbar radicular syndromes

    International Nuclear Information System (INIS)

    Nian Dingfang; Zhou Jun; Li Wenhua; Cao Qingxuan; Xia Baosu; Apitzsch, D.E.

    2007-01-01

    Objective: To evaluate the effectiveness of CT-guided periradicular therapy (PRT) in cervical and lumber radicular syndromes. Methods: Seventy two cases of cervical and lumbar radicular syndromes were treated by CT-guided PRT. During PRT, 10-20 mg of Triamhexal and 3-4 ml of Carbostesin 0.25%(Bupivacainhydrochlorid) were injected into the space around the corresponding spinal root, once a week, all together six times as a course. Results: Four hundreds and forty six PRT procedures were carried out in 72 patients having a successful puncture and a satisfying spread of Triamhexal and Carbostesin around the spinal nerve root space for every time. After 6 to 24 months follow up, 62 patients showed a significant pain reduction or complete disappearance. Moderate improvement was not noted in 6 and no improvement in 4. The effective rate was 94.4% without any correlative complication. Conclusions: CT-guided PRT is an effective, easy and safe procedure to treat patients with refractory cervical or lumbar radicular pain syndromes. (authors)

  11. Microstructural and rheological properties of irradiated rice Propriedades microestrutural e reológica de arroz irradiado

    Directory of Open Access Journals (Sweden)

    Ívina Catarina de Oliveira Guimarães

    2013-06-01

    Full Text Available The culinary quality of rice directly results in its market value and consumer acceptance. Thus, the present study evaluated the effect of gamma irradiation on the properties of the polished white rice starch, as well as their characteristic pulp. Doses of 6.5 kGy and 7.5 kGy did not alter the microstructure of rice starch granules, but interfered with rheological properties when compared to the control treatment, resulting in a reduction of the maximum and final viscosity and retrogradation. Since the microstructural and rheological properties within the values associated with rice quality, it was inferred that gamma irradiation did not alter the decisive characteristics for the acceptability of this cereal.A qualidade culinária do arroz resulta diretamente em seu valor de mercado e aceitação do consumidor. Assim, no presente estudo, avaliou-se o efeito da irradiação gama sobre as propriedades do amido do arroz branco polido, bem como na sua característica de pasta. Doses de 6,5 kGy e 7,5 kGy não alteraram a microestrutura dos grânulos de amido de arroz, mas interferiram nas propriedades reológicas quando comparado ao tratamento controle, resultando na redução da viscosidade máxima e final; e retrogradação. Esse resultado pode estar correlacionado à presença de radicais livres no arroz branco polido recém-irradiado, os quais se estabilizaram ao passar quatro meses. Desde que as propriedades microestruturais e reológicas se encontrem dentro dos valores associados à qualidade do arroz, a irradiação gama não altera as características determinantes para a aceitação do cereal.

  12. Técnica para correção de truncus arteriosus tipos I e II sem condutos extracardíacos Technique for correction of truncus arteriosus type I and II without extracardiac conduits

    Directory of Open Access Journals (Sweden)

    Miguel Barbero-Marcial

    1989-04-01

    Full Text Available Uma nova técnica para correção cirúrgica do truncus arteriosus (TA sem o uso de conduto extracardíaco foi realizada em 7 pacientes, senão 6 do tipo I, e do tipo II em 1 paciente; a idade variou de 2 a 9 meses. O tronco comum foi septado com retalho, dividindo-o em uma posição aórtica e outra pulmonar; a comunicação interventricular (CIV foi fechada através de ventriculotomia; anastomose direta entre as artérias pulmonares e o ventrículo direito foi realizada, sendo a parede anterior construída com retalho de pericárdio bovino com válvula monocúspide. Houve apenas 1 óbito no pós-operatório. Nos 6 pacientes restantes, a relação entre as pressões sistólicas ventrículo direito/ventrículo esquerdo (VD/VE foi menor que 0,51 em 5 pacientes; em 1 paciente, essa relação foi de 0,60, associada a CIV residual. Todos os pacientes encontram-se em classe funcional I (NYHA, em um período de 1 a 14 meses de pós-operatório. Baseados nestes resultados, propomos esta técnica para pacientes com TA tipo I ou II, no primeiro ano de vida.A new corrective surgery for truncus arteriosus (TA without the use of extracardiac conduit was employed in 7 patients with truncus (TA type I in 6 cases and type II in 1 case, aged from two to nine months. The common TA was septated with a patch into aortic and pulmonary segments and the ventricular septal defect was closed through ventriculotomy; a direct anastomosis between the pulmonary arteries and the right ventricle was performed, the anterior wall of this, being contructed with a patch with a monocusp valve. There was one imediate postoperative death. In the surviving six patients the RV/LV postoperative peak systolic was less than 0.51 in five and 0.60 in one with residual VSD; all are in functional class I, in postoperative period between one and fourteen months. Based in these results we propose this technique for patients with type I or II, in the first year of life.

  13. Economic optimization method to design telescope irrigation of multiples outlets Otimização econômica de condutos telescópicos com múltiplas saídas

    Directory of Open Access Journals (Sweden)

    Marinaldo F. Pinto

    2012-08-01

    Full Text Available In this study is presented an economic optimization method to design telescope irrigation laterals (multidiameter with regular spaced outlets. The proposed analytical hydraulic solution was validated by means of a pipeline composed of three different diameters. The minimum acquisition cost of the telescope pipeline was determined by an ideal arrangement of lengths and respective diameters for each one of the three segments. The mathematical optimization method based on the Lagrange multipliers provides a strategy for finding the maximum or minimum of a function subject to certain constraints. In this case, the objective function describes the acquisition cost of pipes, and the constraints are determined from hydraulic parameters as length of irrigation laterals and total head loss permitted. The developed analytical solution provides the ideal combination of each pipe segment length and respective diameter, resulting in a decreased of the acquisition cost.O presente trabalho teve como objetivo desenvolver um procedimento de cálculo para otimização econômica, aplicado ao dimensionamento de linhas laterais de irrigação telescópicas com múltiplas saídas. A metodologia proposta pode ser empregada para a associação de condutos em série, sendo válida para o dimensionamento de trechos de tubulação com três diferentes diâmetros. Determinando-se a combinação ideal de comprimentos e respectivos diâmetros de cada trecho, obtém-se o resultado de mínimo custo na aquisição de tubulação. Para tal, utilizou-se a técnica dos multiplicadores de Lagrange, submetendo a função de custo às restrições do sistema, cujas variáveis de decisão são o comprimento da tubulação e a perda de carga total ao longo do percurso de escoamento. A técnica dos multiplicadores de Lagrange mostrou-se adequada para a otimização econômica do sistema em questão, quando comparada ao método-padrão de minimização de custos via função objetivo e

  14. Clinicopathological analysis of 232 radicular cysts of the jawbone in a population of southern Taiwanese patients

    Directory of Open Access Journals (Sweden)

    Jeng-Huey Chen

    2018-04-01

    Full Text Available This retrospective study aimed to evaluate the clinicopathological features of 232 cases of radicular cyst (January 2001–December 2016 submitted for histopathological examination to Department of Oral Pathology by endodontists in our institution. Demographic data including age, gender, affected site, involved tooth, and histopathological features, were reviewed. The study population comprised 133 females (57.3% and 99 males (42.7%, with a mean age of 40.5 years and an age range of 13–78 years. Two-hundred and one cysts occurred in the maxilla (86.7% and 31 in the mandible (13.3%. Most cases involved the anterior teeth of the maxilla (67.2%. The most frequently-involved tooth was the maxillary lateral incisor (50.5%. In most cases (228 cases; 98.3%, the cyst was lined with nonkeratinized stratified squamous epithelium, with two cases containing epithelial lining of the mucoepidermoid epithelium (0.9% and respiratory epithelium (0.9%, respectively. One case (0.4% revealed epithelial dysplasia of the epithelial lining. Hyaline body was seen in two cases (0.9%, and Rushton body was noted in seven cases (3.0%. Odontogenic epithelial rest was noted in one case (0.4%. Cholesterol clefts (54 cases; 23.3%, foamy histiocytes (72 cases; 31.0%, hemosiderins (57 cases; 24.6%, dystrophic calcifications (94 cases; 40.5%, foreign bodies (44 cases; 19.0%, and bacterial colonies (22 cases; 9.5% were also observed. Fifty-three cases (22.8% showed a mixed acute and chronic inflammatory infiltrate, whereas chronic inflammatory infiltrate only was noted in 179 cases (77.2%. In summary, the current findings provide a valuable source for clinicopathological reference concerning radicular cysts of the jawbone. Keywords: Periapical cyst, Radicular cyst, Taiwan

  15. A study on radicular cysts of primary teeth mimicking dentigerous cysts

    International Nuclear Information System (INIS)

    Cho, Bong Hae; Nah, Kyung Soo

    1994-01-01

    20 radicular cysts of primary teeth mimicking dentigerous cyst were reviewed. The following results were obtained. 1. The patients' age ranged from 7 to 14 years. Males(60%) were more involved than females (40%). 2. The mandible (85%) was affected more frequently than the maxilla (15%). The mandibular deciduous molar area (80%) was the most frequently involved. 3. The diameter of the cyst varied from 10 to 30 mm. 55% of permanent successors showed underdeveloped roots less than one-third. 4. The etiologic factors were pulp-treated teeth (65%), severe caries (20%), trauma (10%), deep amalgam filling (5%).

  16. Ultrasound Guided Nerve Root Injection in Patients with Cervical Spondylytic Radicular Pain

    Directory of Open Access Journals (Sweden)

    LT Choong

    2009-05-01

    Full Text Available Selective cervical nerve root injection using a mixture of corticosteroid and lignocaine is a treatment option for managing cervical radiculopathic pain. The procedure is usually performed under image guided fluoroscopy or Computerized Tomograhy. Ultrasound-guided cervical nerve root block does not expose the patients and personnel to radiation. During injection, the fluid is mostly visualized in a real-time fashion. This retrospective study reviewed the effectiveness of ultrasound in guiding cervical peri-radicular injection for pain relief in patients with recalcitrant cervical radiculopathy. There were no complications reported in this series.

  17. Lumbar spinal imaging in radicular pain and related conditions. Understanding diagnostic images in a clinical context

    International Nuclear Information System (INIS)

    Wilmink, Jan T.

    2010-01-01

    There is general agreement that lumbosacral nerve root compression is a prime factor in the pathogenesis of sciatica and neurogenic claudication, although humoral and vascular factors certainly play a role as well. This book focuses on imaging of the various ways in which nerve root compression can come about, and assessing which anatomic features are reliably associated with the occurrence of radicular pain, as opposed to morphologic findings which are probably coincidental. After a discussion of the nature of radicular pain and related symptoms, spinal imaging techniques and options are reviewed, with emphasis on the role of MR myelography in assessing the condition of the intradural nerve roots. A chapter on normal topographic, sectional, and functional (dynamic) radiologic anatomy is followed by a presentation on pathologic anatomy, addressing the various mechanisms of nerve root compression. In the chapter on pre- and postoperative imaging, features which may help to predict the evolution of the symptoms are discussed, with an eye to selecting candidates for surgical treatment. This is followed by a discussion of the role and limitations of imaging studies in various adverse postoperative conditions. In illustrations involving patient studies, imaging features are linked where possible to the clinical symptoms and history of the individuals involved. (orig.)

  18. Lumbar spinal imaging in radicular pain and related conditions. Understanding diagnostic images in a clinical context

    Energy Technology Data Exchange (ETDEWEB)

    Wilmink, Jan T. [University Hospital Maastricht (Netherlands). Dept. Radiology

    2010-07-01

    There is general agreement that lumbosacral nerve root compression is a prime factor in the pathogenesis of sciatica and neurogenic claudication, although humoral and vascular factors certainly play a role as well. This book focuses on imaging of the various ways in which nerve root compression can come about, and assessing which anatomic features are reliably associated with the occurrence of radicular pain, as opposed to morphologic findings which are probably coincidental. After a discussion of the nature of radicular pain and related symptoms, spinal imaging techniques and options are reviewed, with emphasis on the role of MR myelography in assessing the condition of the intradural nerve roots. A chapter on normal topographic, sectional, and functional (dynamic) radiologic anatomy is followed by a presentation on pathologic anatomy, addressing the various mechanisms of nerve root compression. In the chapter on pre- and postoperative imaging, features which may help to predict the evolution of the symptoms are discussed, with an eye to selecting candidates for surgical treatment. This is followed by a discussion of the role and limitations of imaging studies in various adverse postoperative conditions. In illustrations involving patient studies, imaging features are linked where possible to the clinical symptoms and history of the individuals involved. (orig.)

  19. The use of lumbar epidural injection of platelet lysate for treatment of radicular pain.

    Science.gov (United States)

    Centeno, Christopher; Markle, Jason; Dodson, Ehren; Stemper, Ian; Hyzy, Matthew; Williams, Christopher; Freeman, Michael

    2017-11-25

    Epidural steroid injections (ESI) are the most common pain management procedure performed in the US, however evidence of efficacy is limited. In addition, there is early evidence that the high dose of corticosteroids used can have systemic side effects. We describe the results of a case series evaluating the use of platelet lysate (PL) epidural injections for the treatment of lumbar radicular pain as an alternative to corticosteroids. Registry data was obtained for patients (N = 470) treated with PL epidural injections presenting with symptoms of lumbar radicular pain and MRI findings that were consistent with symptoms. Collected outcomes included numeric pain score (NPS), functional rating index (FRI), and a modified single assessment numeric evaluation (SANE) rating. Patients treated with PL epidurals reported significantly lower (p < .0001) NPS and FRI change scores at all time points compared to baseline. Post-treatment FRI change score means exceeded the minimal clinically important difference beyond 1 month. Average modified SANE ratings showed 49.7% improvement at 24 months post-treatment. Twenty-nine (6.3%) patients reported mild adverse events related to treatment. Patients treated with PL epidurals reported significant improvements in pain, exceeded the minimal clinically important difference (MCID) for FRI, and reported subjective improvement through 2-year follow-up. PL may be a promising substitute for corticosteroid.

  20. Value of TENS for relief of chronic low back pain with or without radicular pain.

    Science.gov (United States)

    Buchmuller, A; Navez, M; Milletre-Bernardin, M; Pouplin, S; Presles, E; Lantéri-Minet, M; Tardy, B; Laurent, B; Camdessanché, J P

    2012-05-01

    To evaluate the efficacy of transcutaneous electrical neurostimulation (TENS) in patients with chronic low back pain (LBP). Prospective, randomized, multicentre, single-blind study. Twenty-one French pain centres. Two hundred thirty-six consecutive adult patients consulting for chronic LBP, with or without radicular pain (mean age ± standard deviation: 53 ± 13 years; range: 28-86 years). Patients were randomly assigned to receive either active (n = 117) or sham (n = 119) TENS in four 1-h daily treatment sessions for 3 months. The primary outcome measured was improvement of functional status at 6 weeks (Roland-Morris Disability Questionnaire). Secondary outcome measures were improvement of functional status at 3 months, pain relief (weekly visual analogue scale assessments), positive functional repercussions of pain levels on quality of life, a diminution of the use of analgesic and anti-inflammatory medication, satisfaction with the overall treatment strategy and compliance. Functional status did not differ between the groups, whether at 6 weeks or 3 months (p = 0.351 at 6 weeks). A significant improvement between the first and last visual analogue scale assessments was observed in patients with either lumbar pain alone or lumbar and radicular pain treated with active TENS. Other outcome measures did not differ significantly between the two groups. There was no functional benefit of TENS in the treatment of patients with chronic LBP. © 2011 European Federation of International Association for the Study of Pain Chapters.

  1. Alterações químicas e nutricionais do grão-de-bico (Cicer arietinum L.) cru irradiado e submetido à cocção

    OpenAIRE

    Ferreira,Andréa Cristina Penati; Brazaca,Solange Guidolin Canniatti; Arthur,Valter

    2006-01-01

    O presente trabalho teve por objetivos analisar, em grãos não submetidos à irradiação, a composição centesimal e mineral, para verificar as alterações provocadas pela cocção. Em grãos crus e cozidos, não irradiados (controle) e irradiados (doses de 2, 4, 6, 8 e 10 kGy), foram realizadas também as análises de: disponibilidade de ferro in vitro, digestibilidade da proteína in vitro e perfil de aminoácidos. Os resultados das análises dos minerais demonstraram que ocorreu diminuição significativa...

  2. Morphological alterations on human radicular dentin after exposure to different fruit juice drinks = Alterações morfológicas na dentina radicular após exposição a diferentes sucos de fruta

    Directory of Open Access Journals (Sweden)

    Zandim, Daniela Leal

    2011-01-01

    Conclusão: Com base na metodologia utilizada, pode-se concluir que os diferentes sucos de fruta não promoveram alterações significativas na morfologia da dentina radicular apesar da realização subsequente de procedimentos de escovação

  3. Sistema radicular e produtividade de soqueiras de cana-de-açúcar sob diferentes quantidades de palhada

    Directory of Open Access Journals (Sweden)

    Gisele Silva de Aquino

    2015-12-01

    Full Text Available Resumo: O objetivo deste trabalho foi avaliar o efeito de diferentes quantidades de palhada sobre o sistema radicular e a produtividade da cana-de-açúcar (Saccharum officinarum, de primeira e segunda soqueiras, em Latossolo Vermelho eutroférrico. Seis tratamentos foram avaliados : 0, 5 (25%, 10 (50%, 15 (75% e 20 Mg ha-1 (100% de palhada e cana-queimada, na primeira e segunda soqueiras. Utilizou-se a cana-de-açúcar 'SP80-1816'. Avaliou-se a massa de raízes a 0,45 e 0,75 m de distância da linha de plantio, até 0,60 m de profundidade. Na primeira soqueira, os tratamentos com 50, 75 e 100% de palhada proporcionaram maior massa radicular até 0,20 m de profundidade, em comparação aos tratamentos cana-queimada, 0 e 5 Mg ha-1 (25% de palhada. Os tratamentos com 50 e 75% de palhada proporcionaram produtividades 43% maiores do que a da cana-queimada (110 Mg ha-1. O tratamento com 10 Mg ha-1 (50% foi suficiente para proporcionar aumento da massa radicular e da produtividade da cana-de-açúcar. O sistema radicular e a produtividade da cana-de-açúcar são favorecidos pela mudança do sistema de colheita de cana-queimada para o de cana sob palhada.

  4. Ação do laser de Nd:YAG intracanal sobre endotoxinas na dentina radicular

    OpenAIRE

    Jose Ricardo de Freitas Archilla

    2007-01-01

    As endotoxinas são responsáveis por importantes reações sistêmicas e locais, podendo comprometer o sucesso do tratamento endodôntico. O hidróxido de cálcio, mesmo com limitações, mostra-se como opção única efetiva entre as soluções irrigadoras e as medicações intracanal na redução das endotoxinas nos túbulos dentinários. O experimento realizado avaliou a eficiência do laser de Nd:YAG frente à uma endotoxina inoculada no canal radicular pela utilização de duas cinemáticas de irradiação. Após u...

  5. Development of a patient-reported outcome instrument for patients with lumbar radicular pain

    DEFF Research Database (Denmark)

    Ibsen, Charlotte; Schiøttz-Christensen, Berit; Nielsen, Claus Vinther

    Background: Low back pain (LBP) is the leading contributor to years lived with disability. It is a complex biopsychosocial phenomenon where complete differential diagnosis and assessment is difficult and needs to be comprehensive. Therefore a biopsychosocial approach is recommended. Substantial...... pain. Methods: The development of the PRO will be based on ICF Comprehensive Core Set for Low Back Pain and Rehabilitation Set and existing items from the The Patient-Reported Outcomes Measurement Information System (PROMIS®). The development process will be divided into five steps: 1. Linking PROMIS....... Conclusion(s) : A PRO instrument is developed to systematise and qualify the description on functioning among patients with lumbar radicular pain. The development process is in progress and next step is to engage patients and clinicians in the development process.  Implications : With development of this PRO...

  6. Radicular lower extremity pain as the first symptom of primary hyperparathyroidism

    Energy Technology Data Exchange (ETDEWEB)

    Mustonen, Antti O.T.; Kiuru, Martti J.; Koskinen, Seppo K. [Toolo Trauma Center, Helsinki University Central Hospital, Topeliuksenkatu 5, 00029, Helsinki (Finland); Stahls, Anders; Bohling, Tom [Department of Pathology, Haartman Institute, University of Helsinki, 00014, Helsinki (Finland); Kivioja, Aarne [Department of Orthopedics and Traumatology, Helsinki University Central Hospital, 00029, Helsinki (Finland)

    2004-08-01

    Clinical symptoms of hyperparathyroidism are generally nausea, vomiting, fatigue, constipation, and hypotonicity of the muscles and ligaments; bone pain and tenderness are also seen but are more common in secondary hyperparathyroidism. We report a histologically confirmed case of a 28-year-old man whose sole symptom of primary hyperparathyroidism was lower extremity radicular pain due to a vertebral brown tumor. Magnetic resonance imaging demonstrated brown tumor to be hyperintense on T2-weighted and slightly hypointense on T1-weighted sequences; it showed intense contrast enhancement with gadolinium. Because brown tumors usually contain hemosiderin a short T2 should have been expected, but this was not seen in our case. Healing resulted in decreasing contrast enhancement on T1-weighted sequences and increasingly short T2. To our knowledge, this is the first report of a lumbar vertebral brown tumor associated with primary hyperparathyroidism. (orig.)

  7. Surgical management with intentional replantation on a tooth with palato-radicular groove

    Directory of Open Access Journals (Sweden)

    Jorge Forero-López

    2015-05-01

    Full Text Available A palato-radicular groove (PRG is a developmental anomaly primarily found in the maxillary lateral incisors. It is a potential communication path between the root canal and the periodontium that decreases the survival prognosis of the affected tooth, therefore compromising the stability of the dental structure in the oral cavity. The aim of this case report is to present an original technique where a PRG was treated by means of intracanal disinfection, PRG sealing with glass ionomer, replantation with intentional horizontal 180 degree rotation of the tooth, and an aesthetic veneer placed to provide adequate tooth morphology. The clinical and biological benefits of this novel technique are presented and discussed.

  8. Radicular lower extremity pain as the first symptom of primary hyperparathyroidism

    International Nuclear Information System (INIS)

    Mustonen, Antti O.T.; Kiuru, Martti J.; Koskinen, Seppo K.; Stahls, Anders; Bohling, Tom; Kivioja, Aarne

    2004-01-01

    Clinical symptoms of hyperparathyroidism are generally nausea, vomiting, fatigue, constipation, and hypotonicity of the muscles and ligaments; bone pain and tenderness are also seen but are more common in secondary hyperparathyroidism. We report a histologically confirmed case of a 28-year-old man whose sole symptom of primary hyperparathyroidism was lower extremity radicular pain due to a vertebral brown tumor. Magnetic resonance imaging demonstrated brown tumor to be hyperintense on T2-weighted and slightly hypointense on T1-weighted sequences; it showed intense contrast enhancement with gadolinium. Because brown tumors usually contain hemosiderin a short T2 should have been expected, but this was not seen in our case. Healing resulted in decreasing contrast enhancement on T1-weighted sequences and increasingly short T2. To our knowledge, this is the first report of a lumbar vertebral brown tumor associated with primary hyperparathyroidism. (orig.)

  9. Estudio comparativo de la cavidad de acceso radicular en conductos curvos con limas de níquel-titanio y taladros de acero inoxidable

    OpenAIRE

    Oncins Rodríguez, J.; Pumarola Suñé, José; Canalda Sahli, Carlos

    2005-01-01

    El propósito de este estudio fue comparar la cantidad de dentina radicular removida y evaluar el mantenimiento de la forma del conducto tras la instrumentación de los dos tercios coronarios radiculares, utilizando instrumentos de acero inoxidable (taladros de Gates Glidden) y de níqueltitanio (limas GT Flare y limas Orifice Shaper). Un total de 42 dientes humanos extraídos con conductos radiculares curvos fueron divididos en tres grupos. Los conductos se instrumentaron mecánicamente usando ta...

  10. Análise comparativa da distribuição de tensões em incisivo central superior, restaurado com diferentes sistemas de pinos intra-radiculares

    OpenAIRE

    Oliveira, Luana Cristina Araújo de [UNESP

    2002-01-01

    Neste trabalho é proposto analisar a distribuição de tensões produzidas na dentina radicular do incisivo central superior restaurado com diferentes sistemas de pinos intra-radiculares, através dos Métodos de Fotoelasticidade e Elementos Finitos. Esta análise foi realizada para os seguintes sistemas de pinos intra-radiculares: fibra de carbono, fibra de vidro, zircônio, aço inoxidável, titânio e metálico fundido (Liga de Cu-Al), o dente hígido foi utilizado como controle. Em ambos método foi c...

  11. Micro-CT evaluation of root and canal morphology of mandibular first premolars with radicular grooves

    Energy Technology Data Exchange (ETDEWEB)

    Boschetti, Emanuele; Mazzi-Chaves, Jardel Francisco; Versiani, Marco Aurélio; Pécora, Jesus Djalma; Saquy, Paulo Cesar; Sousa Neto, Manoel Damião de, E-mail: sousanet@forp.usp.br [Universidade de São Paulo (USP), Ribeirao Preto, SP (Brazil). Departamento de Odontologia Restauradora; Silva-Sousa, Yara Terezinha Correa; Leoni, Graziela Bianchi [Universidade de Ribeirão Preto (UNAERP), Ribeirão Preto, SP (Brazil). Departmento de Endodontia

    2017-09-15

    The aim of this study was to evaluate morphological features of 70 single-rooted mandibular first premolars with radicular grooves (RG) using micro-CT technology. Teeth were scanned and evaluated regarding the morphology of the roots and root canals as well as length, depth and percentage frequency location of the RG. Volume, surface area and Structure Model Index (SMI) of the canals were measured for the full root length. Two-dimensional parameters and frequency of canal orifices were evaluated at 1, 2, and 3 mm levels from the apical foramen. The number of accessory canals, the dentin thickness, and cross-sectional appearance of the canal at different root levels were also recorded. Expression of deep grooves was observed in 21.42% of the sample. Mean lengths of root and RG were 13.43 mm and 8.5 mm, respectively, while depth of the RG ranged from 0.75 to 1.13 mm. Mean canal volume, surface area and SMI were 10.78 mm{sup 3}, 58.51 mm{sup 2}, and 2.84, respectively. Apical delta was present in 4.35% of the sample and accessory canals were observed mostly at the middle and apical thirds. Two-dimensional parameters indicated an oval-shaped cross-sectional appearance of the root canal with a high percentage frequency of canal divisions (87.15%). Canal configuration type V (58.57%) was the most prevalent. C-shaped configuration was observed in 13 premolars (18.57%), whereas dentin thickness ranged from 1.0 to 1.31 mm. Radicular grooves in mandibular first premolars was associated with the occurrence of several anatomical complexities, including C-shaped canals and divisions of the main root canal. (author)

  12. Characterization of Coronal Pulp Cells and Radicular Pulp Cells in Human Teeth.

    Science.gov (United States)

    Honda, Masaki; Sato, Momoko; Toriumi, Taku

    2017-09-01

    Dental pulp has garnered much attention as an easily accessible postnatal tissue source of high-quality mesenchymal stem cells (MSCs). Since the discovery of dental pulp stem cells (DPSCs) in permanent third molars, stem cells from human exfoliated deciduous teeth and from supernumerary teeth (mesiodentes) have been identified as a population distinct from DPSCs. Dental pulp is divided into 2 parts based on the developing stage: the coronal pulp and the radicular pulp. Root formation begins after the crown part is completed. We performed a sequential study to examine the differences between the characteristics of coronal pulp cells (CPCs) and radicular pulp cells (RPCs) from permanent teeth, mesiodentes, and deciduous teeth. Interestingly, although we have not obtained any data on the difference between CPCs and RPCs in permanent teeth, there are some differences between the characteristics of CPCs and RPCs from mesiodentes and deciduous teeth. The MSC characteristics differed between the RPCs and CPCs, and the reprogramming efficiency for the generation of induced pluripotent stem cells was greater in RPCs than in CPCs from deciduous teeth. The proportion of CD105 + cells in CPCs versus that in RPCs varied in mesiodentes but not in permanent teeth. The results indicate that the proportion of CD105 + cells is an effective means of characterizing dental pulp cells in mesiodentes. Taken together, the stem cells in deciduous and supernumerary teeth share many characteristics, such as a high proliferation rate and an immunophenotype similar to that of DPSCs. Thus, mesiodentes accidentally encountered on radiographs by the general dental practitioner might be useful for stem cell therapy. Copyright © 2017 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  13. Micro-CT evaluation of root and canal morphology of mandibular first premolars with radicular grooves

    International Nuclear Information System (INIS)

    Boschetti, Emanuele; Mazzi-Chaves, Jardel Francisco; Versiani, Marco Aurélio; Pécora, Jesus Djalma; Saquy, Paulo Cesar; Sousa Neto, Manoel Damião de; Silva-Sousa, Yara Terezinha Correa; Leoni, Graziela Bianchi

    2017-01-01

    The aim of this study was to evaluate morphological features of 70 single-rooted mandibular first premolars with radicular grooves (RG) using micro-CT technology. Teeth were scanned and evaluated regarding the morphology of the roots and root canals as well as length, depth and percentage frequency location of the RG. Volume, surface area and Structure Model Index (SMI) of the canals were measured for the full root length. Two-dimensional parameters and frequency of canal orifices were evaluated at 1, 2, and 3 mm levels from the apical foramen. The number of accessory canals, the dentin thickness, and cross-sectional appearance of the canal at different root levels were also recorded. Expression of deep grooves was observed in 21.42% of the sample. Mean lengths of root and RG were 13.43 mm and 8.5 mm, respectively, while depth of the RG ranged from 0.75 to 1.13 mm. Mean canal volume, surface area and SMI were 10.78 mm 3 , 58.51 mm 2 , and 2.84, respectively. Apical delta was present in 4.35% of the sample and accessory canals were observed mostly at the middle and apical thirds. Two-dimensional parameters indicated an oval-shaped cross-sectional appearance of the root canal with a high percentage frequency of canal divisions (87.15%). Canal configuration type V (58.57%) was the most prevalent. C-shaped configuration was observed in 13 premolars (18.57%), whereas dentin thickness ranged from 1.0 to 1.31 mm. Radicular grooves in mandibular first premolars was associated with the occurrence of several anatomical complexities, including C-shaped canals and divisions of the main root canal. (author)

  14. Cirurgia coronária com condutos arteriais múltiplos sem circulação extracorpórea Off-pump coronary artery bypass with multiple arterial conduits

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    Daniel Navia

    2005-03-01

    circulação extracorpórea utilizando condutos arteriais para a doença de múltiplos vasos é factível com baixa morbimortalidade em 30 dias.OBJECTIVE: To analyze intra-hospital results in patients undergoing elective off-pump total arterial revascularization and identify morbidity and mortality predictors using this surgical strategy. METHOD: From May 1999 to February 2004, 203 myocardial revascularization procedures with total arterial revascularization without cardiopulmonary bypass (off-pump were carried out in patients with multivessel disease (three vessels 81.7 %, one vessel disease was excluded. We report pre-surgical variables and co-morbidities: average age 63.9 ± 9.13 years, men 182 (89.5%, hypertension 132 (65%, smokers 125 (61%, hypercholesterolemia 152 (74.8%, previous myocardial infarction (> 30 days 73 (35%, moderate to severe ventricular dysfunction 31 (15%, redo five (2.5%. Total arterial revascularization included T-grafts and sequential grafts with left internal mammary (100%, right internal mammary (56.6% and radial (63% arteries. The total number of distal anastomosis was 576 (mean of three grafts/patient, all carried out with external mechanical stabilizers. There were no proximal aortic anastomoses. Conversion to on-pump surgery occurred in three (1.5% patients; 90% of the patients was extubated in the operating room. The multiple logistic regression test was used for statistical analysis. RESULTS: The postoperative incidence of atrial fibrillation was 12.8% (26, oligoanuric renal failure 3% (six, dialysis 0.49% (one, postoperative myocardial infarction 1.47% (three, low cardiac output 4% (eight, Redo for bleeding 1.47% (three, mediastinitis 1.47% (three, stroke 1.47% (three. Intra-hospital mortality was 2.45% (five. The only independent 30 day morbidity predictor was age (p=0.033; OR 1.04; IC 95%: 1-1.08. CONCLUSION: Off-pump myocardial revascularization with arterial conduits for multiple vessel disease is feasible with a low 30-day morbidity

  15. Arquitetura e dimensão do sistema radicular de sete porta-enxertos de videira no Norte do Estado do Paraná

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    Bordin Ivan

    2003-01-01

    Full Text Available Foi estudada a estrutura do sistema radicular de sete porta-enxertos de videira das cultivares IAC 572, Kobber 5BB, Rupestris du Lot, IAC 313, IAC 766, Ripária do Traviú e 420 A, com cinco anos de idade. As raízes foram expostas por escavação e avaliadas pelo programa SIARCS 3.0. Foi utilizado um diagrama de arquitetura radicular, atribuindo-se notas à conformação do sistema radicular. O 'IAC 572' apresentou a maior extensão de raízes e o '420 A', a menor. Os porta-enxertos não apresentaram diferença quanto à arquitetura do sistema radicular. Os mais vigorosos apresentaram maior proporção de raízes enoveladas.

  16. A Double-Blind, Placebo-Controlled, Parallel-Group Pilot Study of Milnacipran for Chronic Radicular Pain (Sciatica) Associated With Lumbosacral Disc Disease

    OpenAIRE

    Marks, David M.; Pae, Chi-Un; Patkar, Ashwin A.

    2014-01-01

    Objective: The current study investigates whether milnacipran, an equipotent serotonin-norepinephrine reuptake inhibitor, is effective in reducing chronic radicular pain in patients (N = 11) with lumbosacral disc disease.

  17. Evaluación tomográfica y radiográfica de la obturación radicular tridimensional de conductos radiculares únicos tratados con tres técnicas de obturación radicular: Estudio in Vitro

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    Mónica Alexandra Pavón Granja

    2016-09-01

    Full Text Available El principal reto durante la terapia endodóntica es la obturación radicular, considerada como fase crítica ya que de esta va a depender el éxito o el fracaso. Por varios años se ha investigado tanto materiales como técnicas que permitan el sellado hermético tridimensional del sistema de conductos radiculares, biocompatibilidad que permita la adecuada reparación de los tejidos periapicales y que la obturación se mantenga con el tiempo proporcionando salud. Objetivo: Evaluar la adaptación tridimensional de tres técnicas de obturación radicular definitiva a nivel del tercio apical de conductos radiculares únicos. Materiales y métodos: Estudio de tipo experimental y aleatorizado, la muestra fue de 42 raíces de dientes uniradiculares divididos en 3 grupos de estudio (n=14, previamente se realizó un registro radiográfico periapical digital de toda la muestra posteriormente fueron instrumentados con técnica hibrida, desinfectados con NaOCl al 5,25% + activación ultrasónica y EDTA al 17%, GA fue sometido a técnica de obturación lateral en frío, GB aplicado técnica de obturación termomecánica McSpadden y GC se obturó con técnica termoplastificada (BeFill-VDW. Resultados: Los grupos C y B observados a través de tomografía computarizada presentaron mejores resultados de obturación radicular que el grupo A que no presentó un buen sellado apical, sin embargo, en el grupo C se observó mejores resultados que en A y B Conclusiones: Las técnicas de obturación radicular definitivas con la técnica termoplastificada mostraron ser ideales para proporcionar un sellado apical hermético durante el tratamiento endodóntico en la fase de obturación

  18. The association between Modic changes and pain during 1-year follow-up in patients with lumbar radicular pain

    International Nuclear Information System (INIS)

    Schistad, Elina Iordanova; Roee, Cecilie; Espeland, Ansgar; Rygh, Lars Joergen; Gjerstad, Johannes

    2014-01-01

    To examine whether Modic changes influence pain during a 1-year follow-up in patients with lumbar radicular pain. A total of 243 patients with lumbar radicular pain due to disc herniation were recruited from two hospitals in Norway and followed up at 6 weeks, 6 months, and 12 months. On baseline lumbar magnetic resonance images, two observers independently evaluated Modic changes (types I-III; craniocaudal size 0-3). Outcomes were sensory pain (McGill Pain Questionnaire), back and leg pain (visual analogue scale, VAS). Association between Modic type and outcomes was explored with a mixed model and then by two-way analysis of variance (ANOVA) at each time point with Modic and treatment groups (surgical, n = 126; nonsurgical, n = 117) as fixed factors, adjusted for disc degeneration, age, sex, smoking, and duration of radicular pain. Modic size was also analyzed using ANOVA. Pain scores had decreased significantly at 1-year follow-up. Modic type was significantly related to McGill sensory scores (mixed model: p = 0.014-0.026; ANOVA: p = 0.007 at 6 weeks), but not to VAS back pain or VAS leg pain scores. At 6 weeks, the mean McGill sensory score was higher in Modic I than in Modic II-III patients (p = 0.003) and in patients without Modic changes (p = 0.018). Modic size L1-S1 was not associated with pain outcomes. Patients with lumbar radicular pain have a substantial pain reduction during 1-year follow-up, but Modic type I changes may imply a slower initial decrease in sensory pain. (orig.)

  19. The association between Modic changes and pain during 1-year follow-up in patients with lumbar radicular pain

    Energy Technology Data Exchange (ETDEWEB)

    Schistad, Elina Iordanova; Roee, Cecilie [Oslo University Hospital, Department of Physical Medicine and Rehabilitation, Ullevaal, Nydalen, Postbox 4956, Oslo (Norway); University of Oslo, Faculty of Medicine, Oslo (Norway); Espeland, Ansgar [Haukeland University Hospital, Department of Radiology, Bergen (Norway); University of Bergen, Section for Radiology, Department of Clinical Medicine, Bergen (Norway); Rygh, Lars Joergen [Haukeland University Hospital, Department of Anesthesiology, Bergen (Norway); Gjerstad, Johannes [National Institute of Occupational Health, Oslo (Norway); University of Oslo, Department of Molecular Biosciences, Oslo (Norway)

    2014-09-15

    To examine whether Modic changes influence pain during a 1-year follow-up in patients with lumbar radicular pain. A total of 243 patients with lumbar radicular pain due to disc herniation were recruited from two hospitals in Norway and followed up at 6 weeks, 6 months, and 12 months. On baseline lumbar magnetic resonance images, two observers independently evaluated Modic changes (types I-III; craniocaudal size 0-3). Outcomes were sensory pain (McGill Pain Questionnaire), back and leg pain (visual analogue scale, VAS). Association between Modic type and outcomes was explored with a mixed model and then by two-way analysis of variance (ANOVA) at each time point with Modic and treatment groups (surgical, n = 126; nonsurgical, n = 117) as fixed factors, adjusted for disc degeneration, age, sex, smoking, and duration of radicular pain. Modic size was also analyzed using ANOVA. Pain scores had decreased significantly at 1-year follow-up. Modic type was significantly related to McGill sensory scores (mixed model: p = 0.014-0.026; ANOVA: p = 0.007 at 6 weeks), but not to VAS back pain or VAS leg pain scores. At 6 weeks, the mean McGill sensory score was higher in Modic I than in Modic II-III patients (p = 0.003) and in patients without Modic changes (p = 0.018). Modic size L1-S1 was not associated with pain outcomes. Patients with lumbar radicular pain have a substantial pain reduction during 1-year follow-up, but Modic type I changes may imply a slower initial decrease in sensory pain. (orig.)

  20. Analysis of mandibular second molars with fused roots and shallow radicular grooves by using micro-computed tomography.

    Science.gov (United States)

    Amoroso-Silva, Pablo; De Moraes, Ivaldo Gomes; Marceliano-Alves, Marilia; Bramante, Clovis Monteiro; Zapata, Ronald Ordinola; Hungaro Duarte, Marco Antonio

    2018-01-01

    This study aimed to describe the morphological and morphometric aspects of fused mandibular second molars with radicular shallow grooves using micro-computed tomography (CT). Eighty-eight mandibular second molars with fused roots were scanned in a micro-CT scanner at a voxel size of 19.6 μm. After reconstruction, only molars without C-shaped roots and presenting shallow radicular grooves were selected. 30 molars were chosen for further analysis. Canal cross-sections were classified according to Fan's modified classification (C1, C2, C3, and C4) and morphometric parameters at the apical region, examination of accessory foramina and tridimensional configuration were evaluated. Three-dimensional reconstructions indicated a higher prevalence of merging type ( n = 22). According to Fan's modified classification, the C4 configuration was predominant in the 3 apical mm. Roundness median values revealed a more round-shaped canals at 3 mm (0.72) than at 2 (0.63) and 1 (0.61) mm from the apex. High values of major and minor diameters were observed in the canals of these evaluated sections. In addition, few accessory apical foramina were observed at 1 and 2 mm from the apex. The average distance between last accessory foramina and the anatomic apex was 1.17 mm. A less complex internal anatomy is found when a mandibular second molar presents fused roots with shallow radicular grooves. The merging type canal was frequently observed. Moreover, the C4 configuration was predominant at a point 3 mm from the apex and presented rounded canals, large apical diameters, and few accessory foramina. The cervical and middle thirds presented C3 and C1 canal configurations most frequently. A minor morphological complexity is found when fused mandibular second molars present shallow radicular grooves.

  1. Caries Radicular en el Adulto Mayor. Revisión Narrativa de Literatura

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    Alberto Carlos Cruz-Gonzáles

    2015-07-01

    Full Text Available La caries radicular (CR se define como una lesión progresiva, crónica, con tejido reblandecido y originada en las raíces dentales expuestas al medio oral. Los adultos mayores son más susceptibles a presentar esta patología que otros grupos etarios, dada su mayor prevalencia de recesiones gingivales. El objetivo del presente artículo es realizar una revisión narrativa de la literatura sobre la caries radicular en el adulto mayor, con el fin de presentar una puesta al día que sirva de guía a los odontólogos para la toma de decisiones clínicas sobre su manejo. Se realizó una búsqueda de artículos en inglés y español, mediante los términos MESH Root Caries (AND Elderly en las bases de datos Pubmed, ScienceDirect, Google Scholar y Scielo, sin restricción para año de publicación. Se incluyeron artículos de investigación en seres humanos y revisiones sistemáticas sobre el tema. Inicialmente se obtuvieron 127 publicaciones de las que se descartaron 13 documentos, luego de la lectura de los resúmenes. Se encontró una alta prevalencia de CR en Colombia y en América Latina (27.6% y 23.71% respectivamente. Entre los factores de riesgo asociados, se reportaron la conservación de un mayor número de dientes en edades avanzadas, la recesión gingival, el acúmulo de biofilm, el uso de prótesis, la ingesta frecuente de azúcares refinados y las alteraciones físicas y cognoscitivas. Se encontró, igualmente, que la localización, el color, la textura superficial y la profundidad de la cavidad son factores determinantes del diagnóstico y el tratamiento de la CR y que la determinación del enfoque terapéutico parte de la clasificación del paciente en un nivel de riesgo.

  2. Cognitive Impairment in Patients with Chronic Neuropathic or Radicular Pain: An Interaction of Pain and Age

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    Orla Moriarty

    2017-06-01

    Full Text Available A growing body of empirical research has confirmed an association between chronic pain and cognitive dysfunction. The aim of the present study was to determine whether cognitive function is affected in patients with a diagnosis of chronic neuropathic or radicular pain relative to healthy control participants matched by age, gender, and years of education. We also examined the interaction of pain with age in terms of cognitive performance. Some limitations of previous clinical research investigating the effects of chronic pain on cognitive function include differences in the pain and cognitive scale materials used, and the heterogeneity of patient participants, both in terms of their demographics and pathological conditions. To address these potential confounds, we have used a relatively homogenous patient group and included both experimental and statistical controls. We have also specifically investigated the interaction effect of pain and age on cognitive performance. Patients (n = 38 and controls (n = 38 were administered a battery of cognitive tests measuring IQ, spatial and verbal memory, attention, and executive function. Educational level, depressive symptoms, and state anxiety were assessed as were medication usage, caffeine, and nicotine consumption to control for possible confounding effects. Both the level of depressive symptoms and the state anxiety score were higher in chronic pain patients than in matched control participants. Chronic pain patients had a lower estimated IQ than controls, and showed impairments on measures of spatial and verbal memory. Attentional responding was altered in the patient group, possibly indicative of impaired inhibitory control. There were significant interactions between chronic pain condition and age on a number of cognitive outcome variables, such that older patients with chronic pain were more impaired than both age-matched controls and younger patients with chronic pain. Chronic pain did not appear

  3. Conservative treatment in patients with an acute lumbosacral radicular syndrome: design of a randomised clinical trial [ISRCTN68857256

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    Peul Wilco C

    2004-11-01

    Full Text Available Abstract Background The objective is to present the design of randomised clinical trial (RCT on the effectiveness of physical therapy added to general practitioners management compared to general practitioners management only in patients with an acute lumbosacral radicular syndrome (also called sciatica. Methods/Design Patients in general practice diagnosed with an acute (less than 6 weeks lumbosacral radicular syndrome and an age above 18 years are eligible for participation. The general practitioners treatment follows their clinical guideline. The physical therapy treatment will consist of patient education and exercise therapy. The primary outcome measure is patients reported global perceived effect. Secondary outcome measures are severity of complaints, functional status, health status, fear of movement, medical consumption, sickness absence, costs and treatment preference. The follow-up is 52 weeks. Discussion Treatment by general practitioners and physical therapists in this study will be transparent and not a complete "black box". The results of this trial will contribute to the decision of the general practitioner regarding referral to physical therapy in patients with an acute lumbosacral radicular syndrome.

  4. The Inflammatory Radicular Cysts Have Higher Concentration of TNF-α in Comparison to Odontogenic Keratocysts (Odontogenic Tumour

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    Vladimir Jurisic

    2007-01-01

    Full Text Available TNF-α is a pleiotropic cytokine that is considered as a primary modifier of inflammatory and immune reaction in response to various inflammatory diseases and tumour. We investigated levels of TNF-α in 43 radicular cysts and 15 odontogenic keratocysts, obtained from patients undergoing surgery, under local anaesthesia, and after aspiration of cystic fluid from non-ruptured cysts. TNF-α is elevated in both cysts’ fluid, but higher values were found in radicular cysts in comparison to keratocysts. The significantly higher concentration of TNF-α was associated with smaller radicular cysts, higher protein concentration, higher presence of inflammatory cells in peri cystic tissues, and the degree of vascularisation and cysts wall thickness (Mann-Whitney U-test, p<0.05. No correlation was found based on these parameters in odontogenic keratocyst, but all cysts have detectable concentrations of TNF-α. We here for the first time present that a difference in the concentration of TNF-α exists between these two cystic types.

  5. Effect of different irrigation protocols on the radicular dentin interface and bond strength with a metacrylate-based endodontic sealer.

    Science.gov (United States)

    Gonçalves, Lisandro; Silva-Sousa, Yara Teresinha Correa; Raucci Neto, Walter; Teixeira, Cleonice Silveira; Sousa-Neto, Manoel Damião; Alfredo, Edson

    2014-06-01

    This study assessed the influence of different endodontic chemical substances on the adhesion of the Epiphany SE/Resilon system (with and without resinous solvent) to radicular dentin walls, using the push-out test and scanning electron microscopy (SEM). Forty-eight root canals of human canines were prepared biomechanically with ProTaper rotary files (crown-down technique) and the radicular dentin was treated with either 17% EDTA, 2% chlorhexidine gel (CHX) or 2.5% NaOCl (control). The root canals were filled with Resilon cones and Epiphany SE sealer with and without resinous solvent. Six groups of eight canals each had their roots sectioned transversally to obtain 1-mm thick slices. Data were subjected to statistical analysis by ANOVA and Tukey's tests. The specimens treated with 17% EDTA (1.59 ± 0.91) presented higher bond strength (P Treatment of root canal walls with 17% EDTA, and addition of a resinous solvent to Epiphany SE produced the highest adhesion to radicular dentin. © 2014 Wiley Periodicals, Inc.

  6. Management of radicular cysts using platelet-rich fibrin and bioactive glass: a report of two cases.

    Science.gov (United States)

    Zhao, Jiing-Huei; Tsai, Chung-Hung; Chang, Yu-Chao

    2014-07-01

    Platelet-rich fibrin (PRF) created by Choukroun's protocol concentrates most platelets and leukocytes from a blood harvest into a single autologous fibrin biomaterial. However, no current data is available concerning the use of PRF for the treatment of periapical lesions. Two cases of radicular cysts were reported using an interdisciplinary approach, including regular endodontic therapy followed by surgical management with PRF and bioactive glass. Two cases of radicular cysts presented as an incidental radiographic finding, appearing as an apical radiolucency with well-circumscribed sclerotic borders. After regular endodontic retreatment, cystic lining/granulation tissues were enucleated and the periradicular bony defect was grafted using PRF and bioactive glass. Then, PRF was applied to serve as a membrane over the grafted defects. Recall periapical radiographs of Case 1 and cone beam computer tomography of Case 2 showed satisfactory healing of the periapical pathosis. In Case 2, the bony defect appeared completely healed at 4 months surgical reentry and the new bone was clinically very dense and mature. The results of these case reports show that the combination of PRF and bioactive glass is an effective modality of regenerative treatment for radicular cysts. Copyright © 2012. Published by Elsevier B.V.

  7. Management of radicular cysts using platelet-rich fibrin and bioactive glass: A report of two cases

    Directory of Open Access Journals (Sweden)

    Jiing-Huei Zhao

    2014-07-01

    Full Text Available Platelet-rich fibrin (PRF created by Choukroun’s protocol concentrates most platelets and leukocytes from a blood harvest into a single autologous fibrin biomaterial. However, no current data is available concerning the use of PRF for the treatment of periapical lesions. Two cases of radicular cysts were reported using an interdisciplinary approach, including regular endodontic therapy followed by surgical management with PRF and bioactive glass. Two cases of radicular cysts presented as an incidental radiographic finding, appearing as an apical radiolucency with well-circumscribed sclerotic borders. After regular endodontic retreatment, cystic lining/granulation tissues were enucleated and the periradicular bony defect was grafted using PRF and bioactive glass. Then, PRF was applied to serve as a membrane over the grafted defects. Recall periapical radiographs of Case 1 and cone beam computer tomography of Case 2 showed satisfactory healing of the periapical pathosis. In Case 2, the bony defect appeared completely healed at 4 months surgical reentry and the new bone was clinically very dense and mature. The results of these case reports show that the combination of PRF and bioactive glass is an effective modality of regenerative treatment for radicular cysts.

  8. Raillietia caprae (Acari: Raillietidae and Psoroptes ovis (Acari: Psoroptidae in the ears of goats in the state of Rio de Janeiro, Southeast Brazil Raillietia caprae (Acari: Raillietidae e Psoroptes ovis (Acari: Psoroptidae nos condutos auditivos de caprinos no Estado do Rio de Janeiro, Brasil

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    João Luiz H. Faccini

    2008-03-01

    Full Text Available Ear cannals of 145 domestic goats including the breeds Saanen, Toggenburg, Anglobian, Alpine, Moxoto (native and crossbred goats from 10 smallholder farms were examined by flushing for the presence of ear mites. Prevalence of Raillietia caprae Quintero, Bassols and Acevedo, 1980 was much more higher than Psoroptes ovis (Hering, 1838 in the studied area, respectively 62% ( 90/145 and 4% ( 6/145. The youngest animal parasitized was eight months old and the oldest was 10 years old. Subclinical otitis is a common feature of infestation by both species but increase of wax and the presence of pus were detected in the flushed material in approximately 10% of the goats examined.Os condutos auditivos de 145 caprinos das raças Saanen, Toggenburg, Anglobian, Alpine, Moxoto (native e mestiços provenientes de 10 pequenos criadores foram examinados pela técnica de lavagem para diagnosticar a infestação por ácaros. A prevalência de Raillietia caprae Quintero, Bassols and Acevedo, 1980 foi muito mais alta do que Psoroptes ovis (Hering, 1838 - 62% (90/145 e 4% (6/145, respectivamente. O animal parasitado mais jovem tinha oito meses de idade e o mais velho 10 anos. Otite subclínica é comum nas infestações por ambas espécies mas aumento de cerume e presença de pus foram diagnosticados no material da lavagem em aproximadamente 10% dos caprinos examinados.

  9. Radiofrequency for the Treatment of Lumbar Radicular Pain: Impact on Surgical Indications.

    Science.gov (United States)

    Trinidad, José Manuel; Carnota, Ana Isabel; Failde, Inmaculada; Torres, Luis Miguel

    2015-01-01

    Study Design. Quasiexperimental study. Objective. To investigate whether radiofrequency treatment can preclude the need for spinal surgery in both the short term and long term. Background. Radiofrequency is commonly used to treat lumbosacral radicular pain. Only few studies have evaluated its effects on surgical indications. Methods. We conducted a quasiexperimental study of 43 patients who had been scheduled for spinal surgery. Radiofrequency was indicated for 25 patients. The primary endpoint was the decision of the patient to reject spinal surgery 1 month and 1 year after treatment (pulsed radiofrequency of dorsal root ganglion, 76%; conventional radiofrequency of the medial branch, 12%; combined technique, 12%). The primary endpoint was the decision of the patient to reject spinal surgery 1 month and 1 year after treatment. In addition, we also evaluated adverse effects, ODI, NRS. Results. We observed after treatment with radiofrequency 80% of patients rejected spinal surgery in the short term and 76% in the long term. We conclude that radiofrequency is a useful treatment strategy that can achieve very similar outcomes to spinal surgery. Patients also reported a very high level of satisfaction (84% satisfied/very satisfied). We also found that optimization of the electrical parameters of the radiofrequency improved the outcome of this technique.

  10. Radiofrequency for the Treatment of Lumbar Radicular Pain: Impact on Surgical Indications

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    José Manuel Trinidad

    2015-01-01

    Full Text Available Study Design. Quasiexperimental study. Objective. To investigate whether radiofrequency treatment can preclude the need for spinal surgery in both the short term and long term. Background. Radiofrequency is commonly used to treat lumbosacral radicular pain. Only few studies have evaluated its effects on surgical indications. Methods. We conducted a quasiexperimental study of 43 patients who had been scheduled for spinal surgery. Radiofrequency was indicated for 25 patients. The primary endpoint was the decision of the patient to reject spinal surgery 1 month and 1 year after treatment (pulsed radiofrequency of dorsal root ganglion, 76%; conventional radiofrequency of the medial branch, 12%; combined technique, 12%. The primary endpoint was the decision of the patient to reject spinal surgery 1 month and 1 year after treatment. In addition, we also evaluated adverse effects, ODI, NRS. Results. We observed after treatment with radiofrequency 80% of patients rejected spinal surgery in the short term and 76% in the long term. We conclude that radiofrequency is a useful treatment strategy that can achieve very similar outcomes to spinal surgery. Patients also reported a very high level of satisfaction (84% satisfied/very satisfied. We also found that optimization of the electrical parameters of the radiofrequency improved the outcome of this technique.

  11. Comparison of the efficacy of transforaminal and interlaminar radicular block techniques for treating lumbar disk hernia

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    Rodrigo Rezende

    2015-04-01

    Full Text Available OBJECTIVE: To compare the interlaminar and transforaminal block techniques with regard to the state of pain and presence or absence of complications.METHOD: This was a randomized double-blind prospective study of descriptive and comparative nature, on 40 patients of both sexes who presented lumbar sciatic pain due to central-lateral or foraminal disk hernias. The patients had failed to respond to 20 physiotherapy sessions, but did not present instability, as diagnosed in dynamic radiographic examinations. The type of block to be used was determined by means of a draw: transforaminal (group 1; 20 patients or interlaminar (group 2; 20 patients.RESULTS: Forty patients were evaluated (17 males, with a mean age of 49 years. There was a significant improvement in the state of pain in all patients who underwent radicular block using both techniques, although the transforaminal technique presented better results than the interlaminar technique.CONCLUSION: Both techniques were effective for pain relief and presented low complication rates, but the transforaminal technique was more effective than the interlaminar technique.

  12. Effectiveness of Slump Neural Mobilization Technique for the management of chronic radicular low back pain

    International Nuclear Information System (INIS)

    Ali, M.; Rehman, S.S.U.; Ahmad, S.; Farooq, M.N.

    2015-01-01

    Objective: To determine the effectiveness of slump neural mobilization technique compared with lumber stabilization exercise (LSE) and shortwave diathermy (SWD) in the physical therapy management of chronic radicular low back pain (CRLBP). Methodology: A sample of 40 patients with CRLBP was selected and randomly placed into two groups A and B. 22 patients were treated with slump neural mobilization technique (SNMT), lumbar stabilization exercise (LSE) and Short wave diathermy (SWD), while 18 patient of group B were treated with LSE and SWD. All the patients were assessed by four point pain scale and Oswestry disability index (ODI) at the baseline and at the completion of three weeks at 5 days per week and 30 minutes single session per day. The data was collected on specially designed Performa and was analyzed by SPSS and paired t test was applied to determine the probability value at 95 % level of significance. Results: Both groups demonstrated significant improvement in pain score and ODI score, although improvement was more significant in group A (p<0.001 for both pain and ODI score) as compared to group B (p=0.003 for pain score and 0.163 for ODI score).table-I-III) Conclusion: It is concluded that SNMTalong LSE and SWD improves pain and function more as compared with LSE and SWD alone during the physical therapy management of CRLBP. (author)

  13. [The expression and significance of RORγT in periapical granulomas and radicular cysts].

    Science.gov (United States)

    Lang, Xiao-ying; Li, Song

    2014-08-01

    To identify retinoic acid-related orphan nuclear receptor-γT (RORγT), the specific markers of T helper 17 (Th17) cells by immunohistochemical analysis to confirm the presence of Th17 cells in periapical lesions. Eighteen radicular cysts (RCs) and 22 periapical granulomas (PGs) were collected in the Department of Oral Pathology after periapical surgery as the experimental samples. Five alveolar bone samples were obtained from a group of impacted third molars recommended for extraction as the control samples. The protein expression of RORγT was measured by immunohistochemical analysis for all samples. In addition, the protein expression of IL-17 was measured at the same time. Statistical analysis was performed using SPSS 17.0 software package to evaluate the differences of expression of RORγT and IL-17 according to type of lesion (PG vs. RC vs. control group) and intensity of the inflammatory infiltration (mild vs. moderate vs. severe vs. control group). RORγT+ cells were detected in all periapical lesions tissues, and the expression of RORγT was significantly higher in periapical lesions than in normal tissues which had no expression of RORγT (Pperiapical lesions in comparison with normal control subjects, indicating that Th17 cells are more likely to exist in periapical lesions.

  14. T lymphocyte activation and cytokine expression in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Ihan Hren, N; Ihan, A

    2009-02-01

    Radicular cysts (RCs) are periapical lesions resulting in jaw bone destruction. The inflammatory dental periapical granuloma (PG) is considered to be the origin of RC formation; however the mechanism of RC development remains unclear. Cell suspension from the surgically extirpated tissue of 27 RCs and 25 PGs was obtained. Bacteriological analysis of the PG tissue samples was performed in order to define two major groups of PG according to the prevailing causative bacterial infection: the streptococcal PG (PG-S, n=10) and the anaerobe PG (PG-A, n=9) group. The inflammatory response of tissue infiltrating lymphocytes was assessed by following T lymphocyte activation (HLA-DR expression) as well as interferon gamma (IFN-gamma) and interleukin 4 (IL-4) production which were evaluated by the flow cytometry. In comparison to RC both types of PG contained a higher proportion of activated T cells (HLA-DR) and lower proportion of IL-4 producing cells. PG-A tissue contained increased percentage of CD3 cells and increased percentage of T helper 1 (Th1) cells in comparison with PG-S. In RC the IFN-gamma production is higher than in streptococcal PG-S but similar as in PG-A. Tissue infiltration by Th2 cells and IL-4 production is likely to play an etiopathogenic role in RC formation.

  15. Study of the relationship between mononuclear inflammatory infiltrate and Ki-67 and basement membrane and extracellular matrix protein expression in radicular cysts.

    Science.gov (United States)

    Mourão, R V C; Júnior, E C Pinheiro; Barros Silva, P G; Turatti, E; Mota, M R L; Alves, A P N N

    2016-05-01

    To evaluate the relationship between mononuclear inflammatory infiltrate and the expression of a proliferative immunomarker (Ki-67) as well as to evaluate basement membrane and extracellular matrix proteins (laminin and collagen type IV) in radicular cysts and dentigerous cysts (DC). Immunohistochemical analyses were performed in heavily inflamed radicular cysts (HIRC), slightly inflamed radicular cysts (SIRC) and DC (n = 20) using Ki-67 (Dako(®) , 1 : 50), anticollagen type IV (DBS(®) , 1 : 40) and antilaminin (DBS(®) , 1 : 20). The data were analysed using anova/Tukey's test (Ki-67) and Kruskal-Wallis/Dunn's test (collagen type IV and laminin) (P collagen type IV in the basement membrane of the SIRC group was significantly more continuous (P = 0.0475) than in the HIRC group. DC had significantly less collagen type IV in extracellular matrix immunoexpression than HIRC and SIRC (P = 0.0246). Laminin was absent in the basement membrane in the SIRC and DC groups, and the extracellular matrix of the HIRC was weak and punctate. The presence of inflammatory factors in the radicular cyst wall modified the expression of proliferation factors in the epithelial lining and the expression of collagen type IV and laminin in the basement membrane, but did not modify extracellular matrix behaviour in radicular cysts. © 2015 International Endodontic Journal. Published by John Wiley & Sons Ltd.

  16. Do L5 and s1 nerve root compressions produce radicular pain in a dermatomal pattern?

    Science.gov (United States)

    Taylor, Christopher S; Coxon, Andrew J; Watson, Paul C; Greenough, Charles G

    2013-05-20

    Observational case series. To compare the pattern of distribution of radicular pain with published dermatome charts. Dermatomal charts vary and previous studies have demonstrated significant individual subject variation. Patients with radiologically and surgically proven nerve root compression (NRC) caused by prolapsed intervertebral disc completed computerized diagrams of the distribution of pain and pins and needles. Ninety-eight patients had L5 compressions and 83 had S1 compressions. The distribution of pain and pins and needles did not correspond well with dermatomal patterns. Of those patients with L5 NRC, only 22 (22.4%) recorded any hits on the L5 dermatome on the front, and only 60 (61.2%) on the back with only 13 (13.3%) on both. Only 1 (1.0%) patient placed more than 50% of their hits within the L5 dermatome. Of those patients with S1 NRC, only 3 (3.6%) recorded any hits on the S1 dermatome on the front, and only 64 (77.1%) on the back with only 15 (18.1%) on both. No patients placed more than 50% of their hits within the S1 dermatome. Regarding pins and needles, 27 (29.7%) patients with L5 NRC recorded hits on the front alone, 27 (29.7%) on the back alone, and 14 (15.4%) on both. Nineteen (20.9%) recorded more than 50% of hits within the L5 dermatome. Three (3.6%) patients with S1 NRC recorded hits on the front alone, 44 (53.0%) on the back alone, and 18 (21.7%) on both. Twelve (14.5%) recorded more than 50% of hits within the S1 dermatome. Patient report is an unreliable method of identifying the anatomical source of pain or paresthesia caused by nerve root compression. 4.

  17. Immunohistochemical analysis of FoxP3+ cells in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Peixoto, Raniel Fernandes; Pereira, Joabe dos Santos; Nonaka, Cassiano Francisco Weege; Silveira, Ericka Janine Dantas da; Miguel, Márcia Cristina da Costa

    2012-09-01

    To compare the number of FoxP3(+) cells between periapical granulomas (PGs) and radicular cysts (RCs), and to correlate this number with the intensity of the inflammatory infiltrate in these lesions and with epithelial thickness of RCs. Thirty PGs and 30 RCs were submitted to immunohistochemical analysis using an anti-FoxP3 polyclonal antibody. FoxP3(+) cells were counted under a light microscope (×400 magnification) in five fields and the mean value was calculated for each specimen. Statistical tests were used to evaluate differences in the number of FoxP3(+) cells according to type of lesion (PG vs. RC), intensity of the inflammatory infiltrate (grade I/II vs. grade III), and epithelial thickness of RCs (atrophic vs. hyperplastic). FoxP3(+) cells were detected in most PGs (93.3%) and RCs (93.3%). The median number of FoxP3(+) cells was 2.40 in PGs and 1.00 in RCs, with this difference being statistically significant (P=0.005). No significant differences in the number of FoxP3(+) cells were observed in terms of the intensity of the inflammatory infiltrate (P=0.465) or epithelial thickness of RCs (P=0.737). The present results suggest a greater participation of regulatory T cells in the modulation of the inflammatory response in PGs. In addition, the presence of a less effective regulatory environment in RCs, together with the high levels of inflammatory mediators as reported in the literature, may contribute to the greater growth potential of these lesions. Copyright © 2012 Elsevier Ltd. All rights reserved.

  18. Outcome analysis of two different injection solutions for epidural injection in radicular lumbar backache syndromes

    International Nuclear Information System (INIS)

    Saqib, M.; Mukhtar, M.; Bhatti, S.N; Afridi, E.A.K.; Khan, R.

    2017-01-01

    Background: Backache is a significant source of disability and suffering in our society. The treatment modalities need continued enhancement in order to achieve the desired goals of lowering morbidity and financial losses while improving the response of the patient. Methods: This prospective comparative study was conducted at the department of Orthopaedics and Spine Surgery, Khyber Teaching Hospital Peshawar from July 2013 to June 2015. Two interventional groups were designated; Group 1 was comprised of 54 patients who were injected with epidural bupivacaine plus methylprednisolone while Group 2 included 55 patients who were injected with bupivacaine only. Outcome was assessed using the visual analogue scale and Oswestry disability index (ODI). Results: Fifty-five female and 54 male patients with mean age 49.37 years+-10.46 SD, Mean symptoms duration was 15.01 months+-9.32 SD. Common presenting symptoms were backache (77.1 percent), lower limbs pain (66.1 percent), dermatomal paresthesias (54.1 percent) and neurogenic claudication in 57.8 percent patients. The mean visual analogue score (VAS) after injection was 3.18+-1.29 while mean ODI after injection was 23.615. There was a statistically significant reduction in VAS scores (2-sided p=0.003, OR =4.03, 95 percent CI: 1.535-10.60) following the injection. Conclusion: An epidural spinal injection is a viable option for achieving relief of pain and improves functioning in individuals with radicular backache. However, further research is advised in order to clarify the role of ESI for long-term relief. (author)

  19. Fractura patológica de la mandíbula asociada a quiste radicular: Reporte de 3 casos clínicos Mandibular pathologic fracture associated with radicular cyst: Report of three clinical cases

    Directory of Open Access Journals (Sweden)

    J. Bouguila

    2008-08-01

    Full Text Available Introducción. El quiste radicular es el quiste más común de los maxilares. Su tamaño puede variar desde una lesión que abarca el proceso alveolar hasta uno extenso que oblitera el espacio antral maxilar o causa una fractura patológica mandibular. Reporte de casos. Se reportan tres casos con fractura patológica mandibular asociados a quiste radicular ocurridos después de trauma facial. El diagnóstico fue sugerido por un estudio clínico, radiografía panorámica y confirmado por el estudio histopatológico de la pieza operatoria. El tratamiento consistió en enucleación quística seguido por inmovilización de fragmentos con osteosíntesis o bloqueo intermaxilar. El resultado clínico y radiológico a corto plazo fue favorable. Discusión. Se discuten aspectos propios de la patología y su terapia. Conclusión. El éxito del tratamiento depende de una adecuada terapia en que sus principios más importantes son la remoción de la lesión mediante enucleación y una fijación estable.Introduction. Radicular cyst is the most common cyst of the oral cavity. It may range in size from a small periapical lesion to one that can obliterate the antral space or cause mandibular fracture. Case reports. We report three cases of radicular cyst complicated by mandibular fracture that occurred after maxillofacial trauma. The diagnosis was strongly suggested by panoramic radiography and confirmed by pathology examination of the operative specimen. Treatment consisted in cyst enucleation followed by immobilization of fragments by osteosynthesis or maxillomandibular fixation. The clinical and radiologic outcome was favorable. Discussion. The particularities and treatment are discussed. Conclusion. Treatment success is dependent on adequate therapy, the principles of which are removing the lesion and providing stable fixation.

  20. Atitudes e conhecimento dos consumidores sobre os alimentos irradiados: um inquérito conduzido em Natal, Brasil / Consumer attitudes and knowledge about irradiated foods: a survey conducted in Natal, Brazil

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    André Luiz Barbosa de Lima

    2014-05-01

    Full Text Available O objetivo deste estudo é avaliar as atitudes e o conhecimento dos consumidores sobre os alimentos irradiados. A amostra do estudo correspondeu a 65,52% de mulheres e a média de idade foi 41,82 (D.P.: 14,33 anos. Apenas 66,9% dos consumidores entrevistados consultam a lista de ingredientes no rótulo dos alimentos embalados, e 13,4% destes disseram ter detectado a frase “ALIMENTO TRATADO POR PROCESSO DE IRRADIAÇÃO”. Além disso, 86,6% consideravam que a irradiação torna o alimento inseguro e, portanto, 94,9% destes não consumiriam estes alimentos, assim como 29,6% daqueles que consideraram o contrário. As mulheres apresentaram escore de atitude menos favorável que os homens em relação aos alimentos irradiados. A televisão foi considerada o meio de comunicação mais eficiente para informar sobre os alimentos irradiados. Concluímos que os consumidores do município do Natal carecem de informações sobre a irradiação de alimentos e a aceitação destes produtos depende da forma como são aplicadas as políticas de segurança alimentar e de educação sanitária, inclusive através do uso de fontes de disseminação da informação em massa. As informações contidas nos rótulos de alimentos irradiados são controversas, apesar de serem instrumentos suficientes de detecção de alimentos irradiados por parte destes consumidores. --------------------------------------------------------------------------- The aim of this study is to assess the attitudes and knowledge of consumers about irradiated foods. The study sample corresponded to 65.52% women and the mean age was 41.82 (SD: 14.33 years. Only 66.9% of respondents consumers consult the list of ingredients on the label of packaged foods, and 13.4% of them said they had detected the phrase “FOOD TREATED BY IRRADIATION PROCESS.” Furthermore, 86.6% considered that irradiation becomes unsafe food and thus 94.9% of those not consume these foods, as well as 29.6% of those who

  1. Effects of neural mobilization on pain, straight leg raise test and disability in patients with radicular low back pain

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    Haris Čolaković

    2013-09-01

    Full Text Available Introduction: Radicular low back pain is a disorder involving the dysfunction of the lumbosacral nerve roots. Clinical rehabilitation approaches for low back pain include kinesiotherapy, and physical therapyprocedures: ice , rest , heat, ultrasound, TENS, but evidences regarding their effectiveness are lacking. The purpose of this study was to determine if nerve mobilization brings better improvements in pain, SLR testand functional disability in patients with radicular low back pain compared to standard physical therapy.Methods: The study was conducted on a 60 patients with Radicular low back pain, treated in Regional medical center "Dr Safet Mujić", Mostar, during the period from 01.04.2010 untill 31.04.2011. Patientswere divided into two groups. First group (n=30 received a 4-week rehabilitation program including neural mobilization and lumbar stabilization program. Second group (n=30 received a 4-week rehabilitation program including active range of motion (ROM exercises and lumbar stabilization program.Results: At the beginning, the two groups were not signifi cantly different in terms of score or SLR. After therapy there was statistically signifi cant improvement between groups in both VAS scores[Group A: 1.16±1.5; Group B: 2.25±2.2] and SLR [Group A: 80.9±17.4; Group B: 65.9±16.4]. ]. After the treatment, in group A, 46.6% (14 participants had been rated with 4, but in Group B: 33.3% (10 participants had been rated with 3.Conclusions: Patients treated with neural mobilization and lumbar stabilization showed better VAS scores and Straight Leg Test scores compared to patients treated with active range of motion exercises and lumbar stabilization. Further research to investigate their long term effi cacy is warranted, with emphasis on greater number of participants.

  2. Nuevos métodos de desinfección y limpieza del sistema de conductos radiculares

    OpenAIRE

    Castelo Baz, Pablo

    2012-01-01

    La desinfección y limpieza del sistema de conductos radiculares, es considerada una parte esencial en la preparación químico-mecánica del mismo, cuyo fin es poder conseguir el éxito en endodoncia. El fin de esta tesis doctoral es demostrar la utilidad clínica de dos de estos nuevos mecanismos, la irrigación ultrasónica continua por un lado y el láser de diodo por el otro.

  3. Estudo clínico da eficácia do bloqueio anestésico radicular transforaminal no tratamento da radiculopatia lombar Estudio clínico de la eficacia del bloqueo anestésico radicular transforaminal en el tratamiento de la radiculopatía lumbar Clinical study on the efficacy of transforaminal radicular block in lumbar radiculopathy treatment

    Directory of Open Access Journals (Sweden)

    Fabiano Fonseca Rodrigues de Souza

    2011-01-01

    Full Text Available OBJETIVO: O objetivo deste estudo é avaliar a eficácia da injeção transforaminal nos pacientes com dor radicular devido à hérnia de disco ou estenose foraminal lombar por meio de estudo prospectivo randomizado. MÉTODOS: Foram avaliados 61 pacientes com quadro de radiculopatia nos membros inferiores. Esses pacientes foram divididos em dois grupos escolhidos aleatoriamente. Desses, 32 foram submetidos à injeção de corticosteroides e 29 foram submetidos à injeção salina. O período de acompanhamento foi de 12 meses. Para avaliar os resultados aplicamos a Escala Analógica Visual de Dor (EAV e o Índice Oswestry (ODI. RESULTADOS: Houve melhora significativa da intensidade de dor (p OBJETIVO: El presente estudio tuvo como objetivo evaluar la eficacia de la inyección transforaminal en pacientes con dolor radicular, debido a la hernia discal lumbar o estenosis foraminal, mediante un estudio prospectivo y aleatorizado. MÉTODOS: Se analizó un total de 61 pacientes con cuadro de radiculopatía en miembros inferiores. Estos pacientes fueron divididos en dos grupos seleccionados al azar. De ellos, 31 fueron sometidos a inyecciones de corticoides y a 29 se les aplicaron inyecciones de suero fisiológico. El período de seguimiento fue de 12 meses. Para evaluar los resultados se les aplicó la Escala Visual Analógica del dolor (EAV y el Índice de Oswestry (ODI, sigla en inglés. RESULTADOS: Hubo una mejora significativa en la intensidad del dolor (p OBJECTIVE: To assess the efficacy of corticosteroid injections in patients with sciatica due to lumbar disc herniation or lumbar foraminal stenosis by a prospective randomized study. METHODS: There were analyzed 61 patients with sciatica due to lumbar disc degeneration. These patients were divided into two groups randomly chosen to radicular blocks with saline solution or corticosteroids. Thirty-one of these patients were submitted to corticosteroids radicular block and 29 patients were submitted

  4. ANALISIS DE LOS MECANISMOS INVOLUCRADOS EN LA LOCALIZACION ASIMETRICA DE TPRP1 Y ATPRP3 EN EL PELO RADICULAR DE ARABIDOPSIS THALIANA

    OpenAIRE

    RODRIGUEZ FURLAN, CECILIA

    2012-01-01

    Las proteínas ricas en prolinas (PRPs) son proteínas estructurales involucradas en el ensamblaje de la pared celular. En Arabidopsis dos miembros de esta familia de genes, ATPRP1 y ATPRP3, se expresan específicamente en células de pelo radicular. Los pelos radiculares elongan mediante crecimiento por el ápice a partir de células epidermales especializadas denominadas tricoblastos. El crecimiento por el ápice involucra la secreción polarizada de los materiales necesarios para formar la memb...

  5. Anatomia radicular de milho em solo compactado Anatomy of maize roots in compacted soil

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    Anderson Cristian Bergamin

    2010-03-01

    Full Text Available O objetivo deste trabalho foi avaliar a relação entre a estrutura anatômica das raízes de milho e os atributos físicos de solo submetido a diferentes graus de compactação. O estudo foi realizado em campo, no Município de Dourados, MS, em Latossolo Vermelho distroférrico, textura muito argilosa. O delineamento experimental foi o de blocos ao acaso, com cinco repetições. O solo utilizado apresentava histórico de oito anos com plantio direto. A compactação adicional do solo foi realizada por meio de tráfego com trator, com uma (PDc1, duas (PDc2, quatro (PDc4 e seis passadas (PDc6 sucessivas, sobre toda a área da parcela. Houve aumento na razão entre o córtex e o cilindro vascular da raiz com o aumento na compactação do solo. Essa razão correlacionou-se negativamente com a macroporosidade e positivamente com a densidade do solo e com a resistência do solo à penetração. O grau de compactação afeta a anatomia radicular do milho, e a resistência do solo à penetração é o indicador físico que melhor expressa esse efeito.The objective of this work was to evaluate the relationship between maize root anatomy and physical attributes of soil subjected to levels of compaction. The experiment was carried out in field conditions, in Dourados, Mato Grosso do Sul state, Brazil, in a clayed Latossolo Vermelho (Rhodic Acrustox. A randomized complete block design was used, with five replicates. The soil was cultivated for eight years under no-tillage. The additional compaction of the soil was done by tractor traffic in one (PDc1, two (PDc2, four (PDc4 and six successive passes (PDc6, in the entire area of the experimental plots. Ratio between the cortex and vascular cylinder of the root increased with soil compaction. This ratio was negatively correlated to macroporosity, and positively to soil density and soil penetration resistance. Soil compaction level affects the anatomy of maize roots, and its penetration resistance is the best

  6. Genetic predictors of recovery in low back and lumbar radicular pain.

    Science.gov (United States)

    Bjorland, Siri; Røe, Cecilie; Moen, Aurora; Schistad, Elina; Mahmood, Aqsa; Gjerstad, Johannes

    2017-08-01

    Previous data suggest that persistent back pain may be associated with genetic variability. In this study, we assessed the correlation between 8 genetic polymorphisms (VDR, COL11, MMP1, MMP9, IL-1α, IL-1RN, OPRM1, COMT) and pain recovery in patients with low back pain (LBP) and lumbar radicular pain (LRP). In total, 296 patients with LBP or LRP were followed for 5 years. The patients underwent standardized clinical examination and completed pain and function questionnaires. Univariate linear regression associations with P values pain intensity at baseline, age, sex, smoking, body mass index, and LBP or LRP. Pain intensity at 5-year follow-up was associated with VDR rs731236 (B = -0.5, 95% confidence interval [CI] -0.9 to -0.1, P = 0.017), MMP9 rs17576 (B = 0.5, 95% CI 0.1-0.9, P = 0.022), and OPRM1 rs1799971 (B = -0.8, 95% CI -1.4 to -0.2, P = 0.006) in the univariate analyses. MMP9 rs17576 and OPRM1 rs1799971 remained significant (B = 0.4, 95% CI 0.05-0.8, P = 0.026 and B = -0.8, 95% CI -1.3 to -0.2, P = 0.007) in the multivariable model. Thus, the data demonstrated that the rare allele of MMP9 rs17576 was associated with poor pain recovery, whereas the rare allele of OPRM1 rs1799971 was associated with better pain recovery at 5-year follow-up in the LBP and LRP patients. In particular, the present study suggested that the OPRM1 rs179971 A>G in men was associated with better long-term pain recovery. In men, the OPRM1 rs1799971 explained 4.7% of the variance of pain intensity. We conclude that the MMP9 rs17576 and OPRM1 rs1799971 genotypes may affect 5-year recovery in patients with LBP and LRP.

  7. Assessment of radicular dentin permeability after irradiation with CO2 laser and endodontic irrigation treatments with thermal imaging

    Science.gov (United States)

    Cho, Heajin; Lee, Robert C.; Chan, Kenneth H.; Fried, Daniel

    2017-02-01

    Previous studies have demonstrated that the permeability changes due to the surface modification of dentin can be quantified via thermal imaging during dehydration. The CO2 laser has been shown to remove the smear layer and disinfect root canals. Moreover, thermal modification via CO2 laser irradiation can be used to convert dentin into a highly mineralized enamel-like mineral. The purpose of this study is to evaluate the radicular dentin surface modification after CO2 laser irradiation by measuring the permeability with thermal imaging. Human molar specimens (n=12) were sectioned into 4 axial walls of the pulp chamber and treated with either 10% NaClO for 1 minute, 5% EDTA for 1 minute, CO2 laser or none. The CO2 laser was operated at 9.4 μm with a pulse duration of 26 μs, pulse repetition rate of 300 Hz and a fluence of 13 J/cm2. The samples were dehydrated using an air spray for 60 seconds and imaged using a thermal camera. The resulting surface morphological changes were assessed using 3D digital microscopy. The images from digital microscopy confirmed melting of the mineral phase of dentin. The area enclosed by the time-temperature curve during dehydration, ▵Q, measured with thermal imaging increased significantly with treatments with EDTA and the CO2 laser (Ptreatment increases permeability of radicular dentin.

  8. Lodo de esgoto e sistema radicular da pupunheira Sewage sludge doses and the root system of peach palm

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    Fernando Vinicio Armas Vega

    2005-04-01

    Full Text Available Os efeitos do lodo de esgoto sobre o sistema radicular da pupunheira foram estudados em experimento em campo, em blocos casualizados, instalado em Ubatuba (SP, em julho 2001, na densidade de 5.000 plantas ha-1. As doses de lodo de esgoto fresco (79,7 % de umidade utilizadas foram de 0, 38, 76 e 152 t ha-1, equivalentes a 0, 100, 200 e 400 kg ha-1 de N. Os tratamentos foram aplicados no sulco de plantio, adicionando-se 15 g por planta de KCl como fonte de K. A análise do sistema radicular foi efetuada doze meses após, por meio de trado e de trincheiras e com o auxílio de fotos digitais. Detectou-se que o sistema radicular de pupunheiras com um ano de campo estava concentrado nas camadas superficiais (acima de 75 % nos primeiros 20 cm, assim como em distâncias de até 0,5 m da base da planta. O lodo de esgoto modificou positivamente a densidade do solo, alterando também favoravelmente a densidade das raízes. Houve aumento na biomassa radicular proporcional às doses de lodo de esgoto, existindo uma relação direta daquela com a fitomassa aérea. Doses de lodo equivalentes a 200 e 400 kg de N contribuíram para aprofundar o sistema radicular e proporcionaram maior quantidade relativa de raízes finas.The effects of sewage sludge doses on the root system of peach palm were studied in a field experiment, in randomized complete blocks, carried out in Ubatuba, state of São Paulo, Brazil. The trial was set up in July 2001, with a density of 5,000 plants ha-1. The sewage sludge doses (79.7 % water content were 0, 38, 76, and 152 t ha-1, which were equivalent to doses of 0, 100, 200, and 400 kg ha-1 of N. The treatments were applied in the planting furrow, and every plant was provided with K by a dose of 15 g potassium chloride. The root system was analyzed one year after planting using soil auger and digging of trenches and with the help of digital images. It was concluded that the root system of one-year old peach palm was concentrated in the

  9. Concordant pressure paresthesia during interlaminar lumbar epidural steroid injections correlates with pain relief in patients with unilateral radicular pain.

    Science.gov (United States)

    Candido, Kenneth D; Rana, Maunak V; Sauer, Ruben; Chupatanakul, Lalida; Tharian, Antony; Vasic, Vladimir; Knezevic, Nebojsa Nick

    2013-01-01

    Transforaminal and interlaminar epidural steroid injections are commonly used interventional pain management procedures in the treatment of radicular low back pain. Even though several studies have shown that transforaminal injections provide enhanced short-term outcomes in patients with radicular and low back pain, they have also been associated with a higher incidence of unintentional intravascular injection and often dire consequences than have interlaminar injections. We compared 2 different approaches, midline and lateral parasagittal, of lumbar interlaminar epidural steroid injection (LESI) in patients with unilateral lumbosacral radiculopathic pain. We also tested the role of concordant pressure paresthesia occurring during LESI as a prognostic factor in determining the efficacy of LESI. Prospective, randomized, blinded study. Pain management center, part of a teaching-community hospital in a major metropolitan US city. After Institutional Review Board approval, 106 patients undergoing LESI for radicular low back pain were randomly assigned to one of 2 groups (53 patients each) based on approach: midline interlaminar (MIL) and lateral parasagittal interlaminar (PIL). Patients were asked to grade any pressure paresthesia as occurring ipsilaterally or contralaterally to their "usual and customary pain," or in a distribution atypical of their daily pain. Other variables such as: the Oswestry Disability Index questionnaire, pain scores at rest and during movement, use of pain medications, etc. were recorded 20 minutes before the procedure, and on days 1, 7, 14, 21, 28, 60, 120, 180 and 365 after the injection. Results of this study showed statistically and clinically significant pain relief in patients undergoing LESI by both the MIL and PIL approaches. Patients receiving LESI using the lateral parasagittal approach had statistically and clinically longer pain relief then patients receiving LESI via a midline approach. They also had slightly better quality of

  10. Criticality Studies in a Pilot Plant for Processing MTR-Type Irradiated Fuels; Estudios de Criticidad de una Planta Piloto para el Tratamiento de Combustibles Irradiados Tipo ' MTR '

    Energy Technology Data Exchange (ETDEWEB)

    Pereira Sanchez, G.; Uriarte Hueda, A. [Junta de Energia Nuclear, Division de Materiales Madrid (Spain)

    1966-05-15

    A number of theoretical studies on nuclear safety have been carried out in a pilot plant being constructed at the Junta de Energia Nuclear in Madrid for processing irradiated fuels from the MTR-type experimental reactor JEN-1. The study was carried out working with aqueous and organic solutions at two levels of {sup 235}U enrichment - 20% and 93%. The paper is divided into two main parts: the first deals with the individual items of equipment, and the interactions between these are studied in the second part. The calculations in this second part have been made using three different methods to make it more certain that the system as a whole can never be critical. The first method employed is based on the solid angle concept and makes it possible to fix the maximum {sup 235}U concentrations within the system. The second method, based on the albedo, supplies the value of the multiplication factor K of the whole assembly as a function of the concentration of {sup 235}U. In the last part, the distribution of the equipment is compared with other similar systems and experimental tests from other sources. Finally, the paper specifies the conditions for working the installation which ensure that a nuclear accident can never occur. (author) [Spanish] Se ha efectuado una serie de estudios teoricos sobre la seguridad nuclear de una planta piloto, que se encuentra en construccion en la Junta de Energfa Nuclear situada en Madrid, para el tratamiento de combustibles irradiados procedentes del reactor experimental JEN-1 del tipo MTR. El estudio se ha realizado utilizando disoluciones, tanto acuosas como organicas, con dos grados de enriquecimiento, 20% y 93% en {sup 235}U. Este trabajo comprende dos partes principales: en la primera se han considerado las distintas unidades del equipo individualmente y en la segunda se han estudiado las interacciones entre ellas. El calculo de esta segunda parte se ha hecho por tres metodos diferentes para tener una mayor seguridad de que el

  11. Comparison of TNF-α and TGF-β1 level in radicular cyst and odontogenic keratocyst fluid and its association with histopathological findings

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    Safoura Seifi

    2013-09-01

    Full Text Available Background: TNF-α is a multifunctional proinflammatory cytokine and TGF-β1 is a secretory protein controlling epithelial proliferation and differentiation. Keratocyst presents an aggressive behavior and a growth mechanism different from that of radicular cyst. Aim: In this line, the present study aimed at evaluating TNF-α and TGF-β1 level and its association with histopathological findings in the two odontogenic lesions of different origins. Materials and Methods: In this case-control study, aspirated fluid of 15 cases of radicular cyst and 15 cases of keratocyst were investigated using ELISA method. The grade of inflammation and the mean number of blood vessels in three microscopic fields were provided with a magnification of 40 times on microscope slides. T-test, x2, Mann Whitney, and Pearson correlation tests were used for the comparison of TNF-α and TGF-β1 levels in the mentioned lesions and the association between cytokine levels and grade of inflammation and angiogenesis.Results: TNF-α and TGF-β1 were observed in aspirated fluid of all radicular cysts and keratocysts. Levels of TNF-α and TGF-β1 were found to be 6.72 ± 2.985 and 5.882 ± 2.985 respectively in radicular cyst fluid and 24.759 ± 94.849 and 63.38 ± 30.069 in keratocyst fluid however, no statistically significant difference was observed in terms of TNF-α (P=0.450 increasing trend in TNF-α level in radicular cyst and keratocyst was accompanied by increased inflammation and angiogenesis (P<0.001 and P=0.001. Conclusion: TNF-α and TGF-β1 are involved in the pathogenesis of radicular cyst and keratocyst. TGF-β1 level was higher in radicular cyst when compared with keratocyst however, TNF-α level was similar in the two lesions. A positive correlation was found between TNF-α level and grade of inflammation and angiogenesis.

  12. Efeito do tratamento do canal radicular com EDTA na retenção de pinos de fibra de vidro

    OpenAIRE

    Luis Alfonso Arana Gordillo

    2010-01-01

    A proposição deste estudo foi analisar o efeito do tratamento da dentina radicular com EDTA na retenção de pinos de fibra de vidro utilizando dois tipos diferentes de cimentos resinosos. Foram utilizados 40 dentes humanos pré-molares hígidos. Após a extração os dentes foram armazenados em água até seu uso. Em seguida, os dentes foram tratados endodonticamente com técnica step back para ser obturados por condensação lateral com cones de guta percha e cimento endodôntico AH Plus. Após a obturaç...

  13. Short-term outcome of fluoroscopic-guided steroid injection therapy of lumber facet cyst-induced radicular pain

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Mi Ri; Kwon, Jong Won; Lee, Jong Seo; Kim, Eu Sang [Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul (Korea, Republic of)

    2015-04-15

    To determine the short-term effect of fluoroscopic-guided steroid injection therapy of lumbar facet cyst-induced radicular pain. Seventeen patients with radiculopathy due to lumbar synovial cysts, who were treated with fluoroscopically guided injection, were retrospectively evaluated. All plain radiographic images and MR images before the therapy were reviewed. Five patients underwent only the facet joint injection, whereas twelve patients underwent the facet joint injection with perineural injection therapy. The clinical course of pain was evaluated on the first follow-up after therapy. Effective pain relief was achieved in 11 (64.7%) of the 17 patients. Among 12 patients who underwent facet joint injection with perineural injection, 9 patients (75%) had an effective pain relief. Of 5 patients, 2 (40%) patients only took the facet joint injection and had an effective pain relief. Fluoroscopic-guided steroid injection therapy shows a good short-term effect in patients with symptomatic lumbar facet joint synovial cysts.

  14. ALELOPATIA DE Arctium minus BERNH (ASTERACEAE NA GERMINAÇÃO E CRESCIMENTO RADICULAR DE SORGO E PEPINO

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    Valdenir José Belinelo

    2008-01-01

    Full Text Available The objectives of this work were identified and characterize the allelopatic activity of extracts obtained from Arctium minus (Hill Bernh (Asteraceae. The fitotoxic activity of organic extracts (1 e 100 mg.L-1 and aqueous extract (5,00 e 0,05% m/v on the germination and radicular growth of the monocotyledon Sorghum bicolor L. (sorghum, and the dicotyledon Cucumis sativus L. (cucumber were evaluated. The results showed the presence of allelopatic activity variable in according to the extract concentration and with the target plant. The intensity of induced inhibitory effect was higher for the ethanolic extract in concentration of 100 mg.L-1 for Sorghum bicolor L. The results also indicates the existence of the potential use of Arctium minus (Hill Bernh ethanolic extract as a natural herbicide and open perspectives for the research of the constituent(s with higher allelopatic activity.

  15. Pain patterns and descriptions in patients with radicular pain: Does the pain necessarily follow a specific dermatome?

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    Hurwitz Eric L

    2009-09-01

    Full Text Available Abstract Background It is commonly stated that nerve root pain should be expected to follow a specific dermatome and that this information is useful to make the diagnosis of radiculopathy. There is little evidence in the literature that confirms or denies this statement. The purpose of this study is to describe and discuss the diagnostic utility of the distribution of pain in patients with cervical and lumbar radicular pain. Methods Pain drawings and descriptions were assessed in consecutive patients diagnosed with cervical or lumbar nerve root pain. These findings were compared with accepted dermatome maps to determine whether they tended to follow along the involved nerve root's dermatome. Results Two hundred twenty-six nerve roots in 169 patients were assessed. Overall, pain related to cervical nerve roots was non-dermatomal in over two-thirds (69.7% of cases. In the lumbar spine, the pain was non-dermatomal in just under two-thirds (64.1% of cases. The majority of nerve root levels involved non-dermatomal pain patterns except C4 (60.0% dermatomal and S1 (64.9% dermatomal. The sensitivity (SE and specificity (SP for dermatomal pattern of pain are low for all nerve root levels with the exception of the C4 level (Se 0.60, Sp 0.72 and S1 level (Se 0.65, Sp 0.80, although in the case of the C4 level, the number of subjects was small (n = 5. Conclusion In most cases nerve root pain should not be expected to follow along a specific dermatome, and a dermatomal distribution of pain is not a useful historical factor in the diagnosis of radicular pain. The possible exception to this is the S1 nerve root, in which the pain does commonly follow the S1 dermatome.

  16. Nonsurgical endodontic therapy along with minimal invasive treatment utilizing Bhasker's hypothesis for the management of infected radicular cystic lesion: A rare case report

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    Sanjeev Kumar Salaria

    2016-01-01

    Full Text Available Radicular cyst (RC is the most common odontogenic cyst of inflammatory origin affecting the jaws; involves the roots of the carious or traumatic non-vital tooth. Different therapeutic modalities, such as nonsurgical endodontic therapy or surgical enucleation with primary closure, decompression etc., were proposed for the management of such lesions. Presenting a case of a 28-year-old otherwise healthy male patient who reported with pain and swelling with respect to tooth #41, 31. Diagnosis of infected RC at a rare location was established on the basis of clinical, radiographical and fine needle aspiration cytological examination. Looking after the clinical characteristics, origin, extension, size of cystic lesion and patient cooperation; nonsurgical endodontic therapy utilizing Bhasker's hypothesis was opted. One year post-operative result suggested that nonsurgical endodontic therapy along with minimally invasive treatment utilizing Bhasker's hypothesis is an effective tool to transform infected radicular cystic lesion to healthy periapical periodontal tissue.

  17. Densidade do solo, atributos químicos e sistema radicular do milho afetados pelo pastejo e manejo do solo

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    V. R. Silva

    2000-03-01

    Full Text Available A integração lavoura-pecuária é uma alternativa de renda dos produtores no sul do Brasil. Entretanto, o pisoteio animal e, ou, o preparo de solo podem compactá-lo, prejudicando o crescimento radicular e a produtividade das plantas. Estudaram-se os efeitos do pisoteio animal em regime de pastejo contínuo durante o inverno/primavera e do impacto do plantio direto e do preparo convencional de solo no estado de compactação, atributos químicos e distribuição radicular. Em Podzólico Vermelho-Amarelo de textura superficial franca, foi implantada uma pastagem de estação fria composta por aveia (Avena strigosa Schreb e azevém (Lolium multiflorum L.. A carga animal variou conforme o crescimento da pastagem. Em dezembro de 1996, foi implantada a cultura do milho (Zea mays L. para a produção de silagem, usando os seguintes tratamentos: plantio direto na área não pastejada, plantio direto após o pastejo, preparo convencional de solo na área não pastejada e preparo convencional de solo após pastejo. As avaliações apresentadas neste estudo são referentes ao terceiro ano de cultivo, no qual houve um período de pastejo de 107 dias. Aos 45 dias da emergência do milho, foram abertas trincheiras (100 x 40 cm para visualizar a distribuição do sistema radicular e coletar amostras de solo, a cada 5 cm, para caracterização química e determinação da densidade do solo e de raízes. Ao longo do perfil (0-40 cm, o desenho da distribuição de raízes indicou maior quantidade de raízes no preparo convencional de solo, concordando com os resultados de densidade de raízes. O pisoteio animal não teve efeito sobre as características físicas, possivelmente pelo fato de o resíduo da pastagem permanecer próximo a 1,0 Mg ha-1 de matéria seca. A densidade do solo no plantio direto, na camada de 5-10 cm, foi de 1,41 Mg m-3, tanto na área pastejada como na não pastejada. No preparo convencional de solo, esses valores foram de 1,15 Mg m-3

  18. Ativação da proteína TGFbetaI latente em pulmão irradiado in vivo Latent TGFbeta1 activation in the lung irradiated in vivo

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    MARCOS DUARTE MATTOS

    2002-12-01

    Full Text Available OBJETIVO: Investigar no pulmão, por imunohistoquímica, a localização das proteínas TGFbeta1 latente e TGFbeta1 ativa, se ocorre ativação radioinduzida da proteína TGFbeta1 latente e a distribuição das fibras colágenas em diversos períodos de tempo após irradiação. MÉTODOS: 32 camundongos isogênicos (C57BL foram divididos em dois grupos: GI (não irradiado com 12 animais e GII (irradiado com 20 animais. Os animais do GII receberam radiação gama (telecobaltoterapia, 60Co, com rendimento de 0,97Gy/min, dose única de 7Gy em corpo inteiro. Os camundongos dos grupos I e II foram sacrificados por estiramento cervical nos períodos de 1, 14, 30 e 90 dias após irradiação. RESULTADOS: Os pulmões irradiados apresentaram: 1 congestão vascular e espessamento dos septos alveolares aos 30 dias e mais intensamente aos 90 dias depois da irradiação; 2 aumento significante da deposição de colágeno em todos os períodos de tempo após irradiação; 3 fraca ativação da proteína TGFbeta1 latente em um dia e intensa aos 14 dias depois da irradiação em brônquios e alvéolos. Nossos resultados sugerem que células dos brônquios e alvéolos podem participar do complexo mecanismo de fibrose pulmonar radioinduzida atuando como fontes da proteína TGFbeta1 ativa.PURPOSE: assess the latent and active TGFb1 localization in the lung, whether or not radiation induces latent TGFbeta1 activation, and the distribution of collagen fibers in the irradiated lung. METHODS: Thirty two C57BL mice were randomly assigned in two groups: GI (non irradiated animals and GII (irradiated animals. The mice from GII received a single whole ¾ body radiation dose of 7Gy, using a 60Co source at a dose rate of 0.97 Gy/min. They were sacrificed by cervical dislocation at 1, 14, 30 and 90 days after radiation. RESULTS: The irradiated lungs showed: 1 vascular congestion and thickness of the alveolar septa 30 days and more intense 90 days after irradiation; 2

  19. Expressão da proteína tgfbeta1 em coração irradiado in vivo In vivo evaluation of expression of TGFbeta1 in the irradiated heart

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    Renato José Affonso Júnior

    2004-04-01

    Full Text Available OBJETIVO: Avaliar, no coração, por imuno-histoquímica, a localização das proteínas TGFbeta1 latente e TGFbeta1 ativa, se ocorre ativação radioinduzida da proteína TGFbeta1 latente, e a distribuição das fibras colágenas em diversos períodos de tempo após irradiação. MATERIAIS E MÉTODOS: Trinta e dois camundongos isogênicos (C57BL foram divididos em dois grupos: GI (não irradiado, com 12 animais, e GII (irradiado, com 20 animais. Os animais do GII receberam radiação gama (telecobaltoterapia, 60Co, com rendimento de 0,97 Gy/min., dose única de 7 Gy em corpo inteiro. Os camundongos dos grupos I e II foram sacrificados por estiramento cervical nos períodos de 1, 14, 30 e 90 dias após irradiação. RESULTADOS: Os corações irradiados apresentaram: 1 alterações nucleares e diminuição das estriações das células musculares cardíacas; 2 aumento significante da deposição de fibras colágenas aos 90 dias depois da irradiação; 3 ativação da proteína TGFbeta1 latente em cardiomiócitos e células do conjuntivo depois da irradiação. CONCLUSÃO: Nossos resultados mostram a importância da proteína TGFbeta1 no processo de fibrose cardíaca radioinduzida e sugerem que células do parênquima (cardiomiócitos e do conjuntivo podem participar deste mecanismo atuando como fontes da proteína TGFbeta1 ativa.OBJECTIVE: To assess the latent and active TGFbeta1 localization in the heart, to evaluate whether or not radiation induces latent TGFbeta1 activation, and to study the distribution of collagen fibers in the irradiated heart. MATERIALS AND METHODS: Thirty-two C57BL mice were randomly assigned in two groups: GI (non irradiated animals and GII (irradiated animals. The mice from GII received a single whole-body radiation dose of 7Gy, using a 60Co source at a dose rate of 0.97 Gy/min. The animals were sacrificed by cervical dislocation at 1, 14, 30 and 90 days after irradiation. RESULTS: The irradiated hearts showed: 1

  20. Assessing the effectiveness of ‘pulse radiofrequency treatment of dorsal root ganglion’ in patients with chronic lumbar radicular pain: study protocol for a randomized control trial

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    Shanthanna Harsha

    2012-04-01

    Full Text Available Abstract Background Chronic lumbar radicular pain can be described as neuropathic pain along the distribution of a particular nerve root. The dorsal root ganglion has been implicated in its pathogenesis by giving rise to abnormal impulse generation as a result of irritation, direct compression and sensitization. Chronic lumbar radicular pain is commonly treated with medications, physiotherapy and epidural steroid injections. Epidural steroid injections are associated with several common and rarer side effects such as spinal cord infarction and death. It is essential and advantageous to look for alternate interventions which could be effective with fewer side effects. Pulse radio frequency is a relatively new technique and is less destructive then conventional radiofrequency. Safety and effectiveness of pulse radio frequency in neuropathic pain has been demonstrated in animal and humans studies. Although its effects on dorsal root ganglion have been studied in animals there is only one randomized control trial in literature demonstrating its effectiveness in cervical radicular pain and none in lumbar radicular pain. Our primary objective is to study the feasibility of a larger trial in terms of recruitment and methodology. Secondary objectives are to compare the treatment effects and side effects. Methods/designs This is a single-center, parallel, placebo-controlled, triple-blinded (patients, care-givers, and outcome assessors, randomized control trial. Participants will have a history of chronic lumbar radicular pain for at least 4 months in duration. Once randomized, all patients will have an intervention involving fluoroscopy guided needle placement to appropriate dorsal root ganglion. After test stimulation in both groups; the study group will have a pulse radio frequency treatment at 42°C for 120 s to the dorsal root ganglion, with the control group having only low intensity test stimulation for the same duration. Primary outcome is to

  1. Bioinformatics, interaction network analysis, and neural networks to characterize gene expression of radicular cyst and periapical granuloma.

    Science.gov (United States)

    Poswar, Fabiano de Oliveira; Farias, Lucyana Conceição; Fraga, Carlos Alberto de Carvalho; Bambirra, Wilson; Brito-Júnior, Manoel; Sousa-Neto, Manoel Damião; Santos, Sérgio Henrique Souza; de Paula, Alfredo Maurício Batista; D'Angelo, Marcos Flávio Silveira Vasconcelos; Guimarães, André Luiz Sena

    2015-06-01

    Bioinformatics has emerged as an important tool to analyze the large amount of data generated by research in different diseases. In this study, gene expression for radicular cysts (RCs) and periapical granulomas (PGs) was characterized based on a leader gene approach. A validated bioinformatics algorithm was applied to identify leader genes for RCs and PGs. Genes related to RCs and PGs were first identified in PubMed, GenBank, GeneAtlas, and GeneCards databases. The Web-available STRING software (The European Molecular Biology Laboratory [EMBL], Heidelberg, Baden-Württemberg, Germany) was used in order to build the interaction map among the identified genes by a significance score named weighted number of links. Based on the weighted number of links, genes were clustered using k-means. The genes in the highest cluster were considered leader genes. Multilayer perceptron neural network analysis was used as a complementary supplement for gene classification. For RCs, the suggested leader genes were TP53 and EP300, whereas PGs were associated with IL2RG, CCL2, CCL4, CCL5, CCR1, CCR3, and CCR5 genes. Our data revealed different gene expression for RCs and PGs, suggesting that not only the inflammatory nature but also other biological processes might differentiate RCs and PGs. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  2. Higher expression of galectin-3 and galectin-9 in periapical granulomas than in radicular cysts and an increased toll-like receptor-2 and toll-like receptor-4 expression are associated with reactivation of periapical inflammation.

    Science.gov (United States)

    de Oliveira, Rita de Cássia Medeiros; Beghini, Marcela; Borges, Cláudia Renata Bibiano; Alves, Polyanna Miranda; de Araújo, Marcelo Sivieri; Pereira, Sanívia Aparecida de Lima; Rodrigues, Virmondes; Rodrigues, Denise Bertulucci Rocha

    2014-02-01

    Cysts and periapical granulomas are inflammatory reactions that develop in response to periapical infection by microbial species in dental root canal. It is known that toll-like receptors (TLRs) are pathogen recognition molecules and that galectins are lectins that can be associated with the inflammatory process, stimulating or inhibiting the immune system. The objective of this study was to evaluate the in situ expression of TLRs and galectins in radicular cysts and periapical granulomas. We analyzed 62 cases (30 radicular cysts, 27 periapical granulomas, and 5 control cases). Indirect immunohistochemistry was used to evaluate the expression of TLRs (TRL-2 and TLR-4) and galectins (Gal-3 and Gal-9). The expression of Gal-3 and Gal-9 was significantly higher in periapical granulomas and radicular cysts than in the control group. Similarly, both Gal-3 and Gal-9 were expressed significantly more in periapical granulomas than in radicular cysts. The expression of TLR-2 was significantly higher in periapical granulomas and radicular cysts than in the control group, and it was also significantly higher in radicular cysts with sinus tract than in the cases without sinus tract. Furthermore, the expression of TLR-4 was significantly higher in the cases of periapical granulomas with sinus tract than in the cases without sinus tract. Gal-3/Gal-9 and TLR-2/TLR-4 expression in the periapical granulomas and radicular cysts is associated with reactive periapical inflammation. Pathobiology of periapical disease is a very complex interplay of many bioactive molecules involved in immunoinflammatory responses. Up-regulation of these bioactive molecules might be an important modulator of inflammatory periapical lesions. Copyright © 2014 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  3. Accuracy of Clinical Tests in Detecting Disk Herniation and Nerve Root Compression in Subjects With Lumbar Radicular Symptoms.

    Science.gov (United States)

    Ekedahl, Harald; Jönsson, Bo; Annertz, Mårten; Frobell, Richard B

    2018-04-01

    To investigate the accuracy of 3 commonly used neurodynamic tests (slump test, straight-leg raise [SLR] test, femoral neurodynamic test) and 2 clinical assessments to determine radiculopathy (radiculopathy I, 1 neurologic sign; radiculopathy II, 2 neurologic signs corresponding to 1 specific nerve root) in detecting magnetic resonance imaging (MRI) findings (extrusion, subarticular nerve root compression, and foraminal nerve root compression). Validity study. Secondary care. We included subjects (N=99; mean age, 58y; 54% women) referred for epidural steroid injection because of lumbar radicular symptoms who had positive clinical and MRI findings. Positive clinical findings included the slump test (n=67), SLR test (n=50), femoral neurodynamic test (n=7), radiculopathy I (n=70), and radiculopathy II (n=33). Positive MRI findings included extrusion (n=27), subarticular nerve compression (n=14), and foraminal nerve compression (n=25). Not applicable. Accuracy of clinical tests in detecting MRI findings was evaluated using sensitivity, specificity, and receiver operating characteristics analysis with area under the curve (AUC). The slump test had the highest sensitivity in detecting extrusion (.78) and subarticular nerve compression (1.00), but the respective specificity was low (.36 and .38). Radiculopathy I was most sensitive in detecting foraminal nerve compression (.80) but with low specificity (.34). Only 1 assessment had a concurrent high sensitivity and specificity (ie, radiculopathy II) in detecting subarticular nerve compression (.71 and .73, respectively). The AUC for all tests in detecting extrusion, subarticular nerve compression, and foraminal nerve compression showed ranges of .48 to .60, .63 to .82, and .33 to .57, respectively. In general, the investigated neurodynamic tests or assessments for radiculopathy lacked diagnostic accuracy. The slump test was the most sensitive test, while radiculopathy II was the most specific test. Most interestingly, no

  4. Expression of Ki-67 in odontogenic cysts: A comparative study between odontogenic keratocysts, radicular cysts and dentigerous cysts.

    Science.gov (United States)

    Modi, Tapan G; Chalishazar, Monali; Kumar, Malay

    2018-01-01

    Odontogenic cysts are the most common cysts of the jaws and are formed from the remnants of the odontogenic apparatus. Among these odontogenic cysts, radicular cysts (RCs) (about 60% of all diagnosed jaw cysts), dentigerous cysts (DCs) (16.6% of all jaw cysts) and odontogenic keratocysts (OKCs) (11.2% of all developmental odontogenic cysts) are the most common. The behavior of any lesion is generally reflected by its growth potential. Growth potential is determined by measuring the cell proliferative activity. The cell proliferative activity is measured by various methods among which immunohistochemistry (IHC) is the commonly used technique. Most of the IHC studies on cell proliferation have been based on antibodies such as Ki-67 and proliferating cell nuclear antigen. In the present study, the total sample size comprised of 45 cases of odontogenic cysts, with 15 cases each of OKC, RC and DC. Here, an attempt is made to study immunohistochemical (streptavidin-biotin detection system HRP-DAB) method to assess the expression of Ki-67 in different layers of the epithelial lining of OKCs, RCs and DCs. Ki-67 positive cells were highest in epithelium of OKC as compared to DC and RC. The increased Ki-67 labeling index and its expression in suprabasal cell layers of epithelial lining in OKC and its correlation with suprabasal cell layers of epithelial lining in DC and RC could contribute toward its clinically aggressive behavior. OKC is of more significance to the oral pathologist and oral surgeon because of its specific histopathological features, high recurrence rate and aggressive behavior.

  5. Uso de estimulantes de crescimento radicular associado a doses de fósforo na cultura do feijoeiro

    Directory of Open Access Journals (Sweden)

    José Iran Cardoso da Silva

    2010-08-01

    Full Text Available O trabalho teve como objetivo avaliar o efeito da aplicação do Stimulate e Forth Seed associados a cinco doses de fósforo(P no desenvolvimento do sistema radicular e parte aérea de plantas de feijão. O experimento foi desenvolvido em condições de casa de vegetação nas dependências do Departamento de Recursos Naturais – Ciência do Solo, da Faculdade de Ciências Agronômicas (FCA, UNESP, Campus de Botucatu, SP. O solo usado foi um Latossolo Vermelho Escuro de textura média. As unidades experimentais foram vasos contendo 8 dm3 de solo mantendo-se a umidade correspondente a 60% do Volume Total de Poros (VTP ocupados por água. Utilizou-se a cultivar de feijão IAC-Carioca, em um delineamento experimental inteiramente casualizado, sendo os tratamentos constituídos de dois produtos (Stimulate e Forth Seed nas respectivas doses 5 e 3 mL Kg-1 de sementes e uma testemunha sem biofertilizante, e 5 doses de P (0, 16, 32, 64 e 128 mg dm-3, com três repetições. Foi avaliada, também, a qualidade fisiológica das sementes usadas no experimento por meio de: a primeira contagem do teste padrão de germinação; b emergência; c vigor, mediante a contagem de emergência; d velocidade de emergência e determinação do crescimento das plântulas. O uso de Stimulate e Forth Seed agregados a doses de P causou redução no peso seco final das plantas.

  6. A posterior approach to cervical nerve root block and pulsed radiofrequency treatment for cervical radicular pain: a retrospective study.

    Science.gov (United States)

    Xiao, Lizu; Li, Jie; Li, Disen; Yan, Dong; Yang, Jun; Wang, Daniel; Cheng, Jianguo

    2015-09-01

    Catastrophic complications have been reported for selective cervical nerve root block (SCNRB) or pulsed radiofrequency (PRF) via an anterolateral transforaminal approach. A posterior approach to these procedures under computed tomography guidance has been reported. Here, we report the clinical outcomes of 42 patients with chronic cervical radicular pain (CCRP) treated with a combination of SCNRB and PRF through a posterior approach under fluoroscopy guidance. We retrospectively reviewed the clinical outcomes of 42 consecutive patients with CCRP who received a combination of SCNRB and PRF through a posterior approach under fluoroscopy guidance. The thresholds of electrical stimulation and imaging of the nerve roots after contrast injection were used to evaluate the accuracy of needle placement. The numeric rating scale was used to measure the pain and numbness levels as primary clinical outcomes, which were evaluate in scheduled follow-up visits of up to 3 months. A total of 53 procedures were performed on 42 patients at the levels of C5-C8. All patients reported concordant paresthesia in response to electrical stimulation. The average sensory and motor thresholds of stimulation were 0.28 ± 0.14 and 0.36 ± 0.14 V, respectively. Injection of nonionic contrast resulted in excellent spread along the target nerve root in large majority of the procedures. The numeric rating scale scores for both pain and numbness improved significantly at 1 day, 1 week, and 1 and 3 months after the treatment. No serious adverse effects were observed in any of the patients. The posterior approach to combined SCNRB and PRF under fluoroscopy guidance appears to be safe and efficacious in the management of CCRP. Copyright © 2015 Elsevier Inc. All rights reserved.

  7. Analysis of CD57+ natural killer cells and CD8+ T lymphocytes in periapical granulomas and radicular cysts.

    Science.gov (United States)

    Silva, Luiz Arthur Barbosa da; Sá, Maria Alice Ramalho; Melo, Rafaela Albuquerque; Pereira, Joabe Dos Santos; Silveira, Éricka Janine Dantas da; Miguel, Márcia Cristina da Costa

    2017-12-18

    The aim of this study was to compare the number of CD57+ natural killer (NK) cells and CD8+ T lymphocytes between periapical granulomas (PGs) and radicular cysts (RCs). Twenty-fives cases of PGs and 25 of RCs were submitted to histological analysis and immunohistochemistry using anti-CD57 and anti-CD8 biomarkers. Positive cells were counted in 10 fields (400× magnification) and the median value was calculated for each case. Statistical tests were used to evaluate differences in the number of CD57+ NK cells and CD8+ T lymphocytes according to type of lesion, intensity of the infiltrate and thickness of the lining epithelium. The number of CD57+ NK cells and CD8+ T lymphocytes was higher in PGs than in RCs (p = 0.129 and p = 0.541, respectively). Comparison of the number of CD57+ NK cells in atrophic and hyperplastic epithelium revealed a larger number of cells in the atrophic epithelium (p = 0.042). A larger number of CD57+ NK cells and CD8+ T lymphocytes were observed in grade III infiltrates compared to grade I/II (p = 0.145 and p = 0.725, respectively). CD8+ T lymphocytes were more prevalent than CD57+ NK cells in most cases when PGs and RCs were analyzed separately or in combination (p < 0.0001). CD57+ NK cells and CD8+ T lymphocytes play a key role in antiviral defense and the presence of these cells supports evidence suggesting the participation of these microorganisms in the pathogenesis of PGs and RCs. The response mediated by CD8+ T lymphocytes was more frequent, indicating greater participation of the adaptive immunity in these chronic lesions.

  8. Analysis of CD57+ natural killer cells and CD8+ T lymphocytes in periapical granulomas and radicular cysts

    Directory of Open Access Journals (Sweden)

    Luiz Arthur Barbosa da Silva

    2017-12-01

    Full Text Available Abstract: The aim of this study was to compare the number of CD57+ natural killer (NK cells and CD8+ T lymphocytes between periapical granulomas (PGs and radicular cysts (RCs. Twenty-fives cases of PGs and 25 of RCs were submitted to histological analysis and immunohistochemistry using anti-CD57 and anti-CD8 biomarkers. Positive cells were counted in 10 fields (400× magnification and the median value was calculated for each case. Statistical tests were used to evaluate differences in the number of CD57+ NK cells and CD8+ T lymphocytes according to type of lesion, intensity of the infiltrate and thickness of the lining epithelium. The number of CD57+ NK cells and CD8+ T lymphocytes was higher in PGs than in RCs (p = 0.129 and p = 0.541, respectively. Comparison of the number of CD57+ NK cells in atrophic and hyperplastic epithelium revealed a larger number of cells in the atrophic epithelium (p = 0.042. A larger number of CD57+ NK cells and CD8+ T lymphocytes were observed in grade III infiltrates compared to grade I/II (p = 0.145 and p = 0.725, respectively. CD8+ T lymphocytes were more prevalent than CD57+ NK cells in most cases when PGs and RCs were analyzed separately or in combination (p < 0.0001. CD57+ NK cells and CD8+ T lymphocytes play a key role in antiviral defense and the presence of these cells supports evidence suggesting the participation of these microorganisms in the pathogenesis of PGs and RCs. The response mediated by CD8+ T lymphocytes was more frequent, indicating greater participation of the adaptive immunity in these chronic lesions.

  9. Quinta parte. Pudriciones Fungosas Radiculares del Fríjol en Valle de Medellín Colombia

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    Cárdona Álvarez Canúto

    1954-11-01

    Full Text Available En esta parte se hace el resumen del estudio que se realizo sobre las pudriciones fungosas radiculares del fríjol en el valle de Medellín, a continuación se enumeran las conclusiones a las que se llegaron: 1A partir de 1948 se hizo un estudio de determinación de los hongos que causan pudriciones de la raíz del fríjol. Dicho estudio se efectuó en Medellín e incluyó organismos de la región y de otros lugares, como Andes, Armero y Palmira. Se usaron organismos que se encontraron asociados con pudriciones de la raíz del fríjol, vigna, remolacha y soya. 2Lo organismos aislados se obtuvieron directamente de las raíces afectadas y no de otra fuente como el suelo o la semilla. 3Concomitante con la obtención de los cultivos de los organismos, se hizo un estudio abarcando apreciación de distribución de los hongos en los plantíos y pérdidas en rendimiento, causadas por los agentes, expresadas en peso de semilla. Se obtuvieron porcentajes naturales de infección variando entre 68.55 y 100% y reducción en el rendimiento hasta del 93%. 4Se hizo una descripción de síntomas y de signos para cada especie patógena encontrada durante este trabajo. Asimismo se estudió la clasificación taxonómica de cada organismo en particular.

  10. [Assessment of rehabilitation progress in patients with cervical radicular pain syndrome after application of high intensity laser therapy - HILT and Saunders traction device].

    Science.gov (United States)

    Haładaj, Robert; Pingot, Julia; Pingot, Mariusz

    2015-07-01

    Osteoarthritis of the spine is a major global health problem, it is an epidemic of our times. It affects all parts of the spine, but the hardest to treat is its cervical region. The cervical spine is most mobile, delicate and sensitive to any load. It requires special care in conservative treatment. To date the selection of effective therapeutic approaches has been controversial. The aim of the study was to assess the progress of rehabilitation in patients with cervical radicular pain syndrome after using two different methods of treatment: HILT and spinal axial traction with the use of Saunders device. The randomized study included 150 patients (81 women and 69 men, aged 24-67 years, mean age 45.5) divided into two groups of 75 patients each with characteristic symptoms of radicular pain. The measurement of the range of cervical spine movement of the cervical spine, visual analog scale for pain - VAS and a NDI questionnaire (Neck Disability Index - Polish version) - an indicator of functional disorders - were used to evaluate the effectiveness of the two different therapies. The results obtained by Saunders method remained significantly higher than those obtained when HILT laser therapy was used for most of the examined parameters. A thorough analysis of the results showed greater analgesic efficacy, improved global mobility and reduced functional impairment in patients treated with Saunders method. Both therapeutic methods manifest analgesic effect and a positive impact on the improvement of range of cervical spine movement in patients with radicular pain in this spine region. HILT laser therapy and Saunders traction device reduce neck disability index in the treated patients. © 2015 MEDPRESS.

  11. A STUDY OF ROOT CANAL MORPHOLOGY OF Cebus apella TEETH ESTUDO ANATÔMICO DO CANAL RADICULAR DE DENTES DE Cebus apella

    OpenAIRE

    Priscilla Rocha Afonso; Leila Marques Araújo; Rafael Rodrigues Lima; Suely Maria Lamarão

    2008-01-01

    Realizou-se um estudo anatômico em dentes do Cebus apella, para análise da anatomia interna do canal radicular dessa espécie, normatizando seu uso como modelo experimental. Utilizaram-se doze animais adultos. Após a remoção do tecido orgânico, os dentes foram removidos, seccionados e fotografados, sendo analisados com um estereomicroscópio. Os resultados mostraram que os dentes apresentaram características semelhantes às dos seres humanos, mas com algumas peculiaridades, tais como: a anatomia...

  12. Desenvolvimento radicular do algodoeiro em resposta à localização do fertilizante Cotton root development as affected by fertilizer placement

    Directory of Open Access Journals (Sweden)

    Fábio Suano de Souza

    2007-04-01

    Full Text Available A utilização de adubos pode-se tornar prejudicial caso o fertilizante não seja localizado adequadamente. No presente trabalho foram estudados o crescimento radicular do algodoeiro (Gossypium hirsutum, o crescimento inicial e a nutrição da planta, considerando o local de aplicação do fertilizante. O estudo foi realizado em vasos com parede de vidro. O fertilizante foi colocado a 5,0 cm abaixo e 0,0, 2,5, 5,0 e 10,0 cm ao lado das sementes. O crescimento radicular foi avaliado a cada três dias e, aos 21 dias após a emergência, as plantas foram coletadas, sendo avaliada a produção de matéria seca e a absorção de macronutrientes. A aplicação de fertilizante proporcionou crescimento inicial mais vigoroso do sistema radicular mesmo em solo previamente corrigido e adubado, o que é importante no estabelecimento da cultura. Somente houve bom crescimento inicial do sistema radicular e da parte aérea do algodoeiro quando o fertilizante foi aplicado de 5,0 a 10,0 cm ao lado e 5,0 cm abaixo das sementes.Unless fertilizer is properly placed in the soil it can be harmful. This experiment was conducted to study cotton (Gossypium hirsutum root growth and initial plant development and nutrition as affected by fertilizer placement. Cotton plants were grown in pots with a glass wall. The fertilizer was applied 5.0 cm under the seed row and 0, 2.5, 5.0 and 10.0 cm beside the seed row. Root growth was evaluated every 3 days, and 21 days after emergence the plants were harvested. Dry matter production and macronutrient absorption were evaluated. Even in previously limed and fertilized soil, localized fertilizer application reinforced the initial growth of cotton roots, which is very important for a good crop establishment in the field. Normal root growth and adequate initial plant development was only observed when the fertilizer was placed 5.0 cm below and from 5.0 to 10.0 cm distance from the seed row.

  13. Efecto del follaje de Tagetes minuta sobre la nodulación radicular de Meloidogyne incognita en Capsicum annuum, en invernadero

    OpenAIRE

    Murga-Gutiérrez, Santos Nélida; Alvarado-Ibáñez, Juan Carlos; Vera-Obando, Nora Yessenia

    2012-01-01

    Se investigó el efecto del follaje del "huacatay" Tagetes minuta sobre la nodulación radicular producida por el nematodo Meloidogyne incognita que parasita el "pimiento páprika" Capsicum annuum cultivado en invernadero, con la finalidad de obtener una alternativa de control de este nematodo. Se utilizaron tres grupos experimentales y un testigo, con 12 macetas cada uno, las cuales contenían suelo y arena estériles (1:1). A este substrato se adicionó el follaje de T. minuta al 20, 35 y 50% (v/...

  14. Sistema radicular de porta-enxertos micropropagados de macieira colonizados com fungos micorrízicos arbusculares Root architecture of apple rootstocks inoculated with arbuscular mycorrhizal fungi

    Directory of Open Access Journals (Sweden)

    Lucir Maria Locatelli

    2002-09-01

    Full Text Available A arquitetura do sistema radicular tem implicações na capacidade da planta de obter nutrientes e água do solo; aspecto, este, não muito considerado nos estudos de desenvolvimento vegetal. O objetivo deste trabalho foi avaliar o comportamento do sistema radicular de dois porta-enxertos micropropagados de macieira (Malus spp., em razão da associação micorrízica. Foram utilizados um porta-enxerto vigoroso e com grande capacidade de enraizamento (Marubakaido e outro ananicante e com sistema radicular pouco desenvolvido (M.9. As plantas oriundas de micropropagação foram transferidas para substrato à base de solo, a fim de serem enraizadas ex vitro. Antes ou após o enraizamento, inoculou-se uma mistura de três isolados de fungos micorrízicos arbusculares ou um filtrado com a biota não-micorrízica do inoculante. Aos 51 e 81 dias, avaliaram-se o número e o comprimento de eixos radiculares e das raízes de ordem 1, 2, 3 e 4. A inoculação micorrízica antes do enraizamento aumentou o número e o comprimento de raízes do porta-enxerto Marubakaido, porém, o portaenxerto M.9 teve o número e o comprimento de raízes diminuído quando a inoculação micorrízica ocorreu antes da fase de enraizamento.Root architecture is scarcely considered in plant physiology studies, despite its great importance to plant growth and development. In order to evaluate the behavior of the root systems of two varieties of apple (Malus spp. rootstock when subjected to mycorrhizal association. Two apple rootstocks were tested: Marubakaido, which is vigorous and roots easily, and M.9, which is dwarfing and poorly rooted. The micropropagated plantlets were transferred to a soil-based substrate and received AMF inoculum, or its non-mycorrhizal biota, before and after a 21-day rooting and weaning period. After 51 and 81 days, the number and length of root axes and of first-, second-, third- and fourth- order roots were evaluated. AMF inoculation before weaning and

  15. Análise topográfi ca, diametral e quantitativa de túbulos dentinários em canais radiculares de dentes

    OpenAIRE

    Siviero, Mariana; Aivazoglou, Marcos U.; Camargo, Samira E. A.; Camargo, Carlos Henrique R.; Valera, Márcia C.

    2010-01-01

    O objetivo deste estudo foi avaliar o número e o diâmetro de túbulos dentinários em canais radiculares, nos diferentes terços, em dentes humanos, visando auxiliar estudos na área da permeabilidade dentinária. Para tal, foram utilizados 24 dentes humanos prémolares hígidos, divididos em 4 grupos de acordo com faixas etárias - G1: 10-15; G2: 16-30; G3: 31-45: G4: 46-80 anos de idade. Os dentes tiveram suas coroas removidas, se...

  16. Biomassa radicular e reservas orgânicas em coastcross consorciada ou não com Arachis pintoi, com e sem nitrogênio, sob pastejo

    OpenAIRE

    Ribeiro, Ossival Lolato; Cecato, Ulysses; Rodrigues, Augusto Manoel; Faveri, Juliana Cantos; Jobim, Clóves Cabreira; Lugão, Simony Marta Bernardo

    2011-01-01

    p. 318-328 Objetivou-se neste trabalho avaliar a concentração de carboidrato não-estrutural e biomassa radicular em pastagens de grama Coastcross + Arachis pintoi; Coastcross + Arachis pintoi com 100kg/ha de nitrogênio (N); Coastcross + Arachis pintoi com 200kg/ha de N; e Coastcross com 200kg/ha de N, nos períodos de verão, outono e inverno. Utilizou-se delineamento experimental em blocos ao acaso com os tratamentos em esquema de parcelas subdivididas, com dua...

  17. "Estudo comparativo da resistência à infiltração que diferentes materiais resinosos utilizados na cimentação de retentores intra-radiculares oferecem à passagem de fluidos que atravessam a dentina"

    OpenAIRE

    Marcio Katsuyoshi Mukai

    2005-01-01

    O Objetivo deste estudo é avaliar in vitro, a resistência que diferentes materiais resinosos têm a passagem de fluidos que atravessam a dentina na ausência de cemento radicular. Foram utilizados 60 dentes humanos cedidos pelo banco de dentes da FOUSP. Os dentes foram submetidos a tratamento endodôntico segundo a técnica de Paiva e Antoniazzi e armazenados a uma temperatura de 37°C em umidade 100% por 24 horas para o preparo do retentor intra -radicular respeitando o limite apical de 4 mm. Os ...

  18. Expressão do gene ASYMMETRIC LEAVES1 (AS1) em explantes radiculares de Passiflora edulis Sims e organogênese in vitro em Passiflora setacea D.C. (Passifloraceae)

    OpenAIRE

    Vieira, Lorena Melo

    2011-01-01

    O presente estudo teve como objetivos caracterizar a expressão do gene ASYMMETRIC LEAVES1 (AS1), via hibridização in situ, durante a regeneração in vitro de segmentos radiculares de Passiflora edulis Sims, espécie comercialmente cultivada, e estabelecer um protocolo reproduzível via organogênese in vitro em Passiflora setacea, espécie silvestre. Explantes radiculares de P. edulis foram cultivados em meio MS, para indução de organogênese de ramos, suplementado com 2,35 μM de BA. Para dete...

  19. Immunohistochemical expression of vascular endothelial growth factor in keratocystic odontogenic tumor, dentigerous cyst, and radicular cyst: A comparative study.

    Science.gov (United States)

    Khajuria, Nidhi; Metgud, Rashmi; Naik, Smitha; Lerra, Sahul; Tiwari, Priya; Mamta; Katakwar, Payal; Tak, Anirudh

    2016-01-01

    Cyst and tumors arise from tissue remains of odontogenesis, these interactions have been considered to play an important role in the tumorigenesis of odontogenic lesions. The connective tissue stroma has an essential role in the preservation of epithelial tissues and minor alterations in the epithelium are followed by corresponding changes in the stroma, such as angiogenesis. Vascular endothelial growth factor (VEGF) is considered the first factor which maintains its position as the most critical driver of vascular formation and is required to initiate the formation of immature vessels, with this aim, present study was executed to evaluate VEGF expression in kertocystic odontogenic tumor, dentigerous cyst and radicular cyst (RC). A retrospective study was carried out comprising a total of 31 cases; 13 cases of keratocystic odontogenic tumor (KCOT), nine cases of dentigerous cyst (DC) and nine cases of RC. The sections were stained immunohistochemically with VEGF antibody and were evaluated for the presence and intensity of the immuno reactive cells. Statistical analysis was carried out using Chi-square test to inter-compare the VEGF expression between KCOT, DC, and RC. VEGF expression in the epithelium and connective tissue was significantly higher in KCOT compared to dentigerous and RC. One case of KCOT with carcinomatous change also revealed positive results for the VEGF expression in the dysplastic epithelium, tumor islands, and connective tissue. The significant difference was observed on inter-comparison of the VEGF expression in the connective tissue of KCOT and DC, whereas no significant difference was observed in the VEGF expression in the connective tissue of KCOT and DC. The present study data supports the literature finding that angiogenesis can be important in the progression and enlargement of odontogenic cysts similarly to what occurs in neoplastic conditions and further it can be concluded that the higher positivity for VEGF of KCOT could help to

  20. Cobertura radicular mediante la utilización de un injerto subepitelial de tejido conectivo combinado con un colgajo pediculado avanzado coronalmente

    Directory of Open Access Journals (Sweden)

    Antonio Díaz Caballero

    2010-01-01

    Full Text Available Las recesiones gingivales son un hallazgo clínico muy frecuente que ocasionan problemas estéticos, hipersensibilidad dentaria y dificultad para llevar a cabo una correcta higiene oral en los pacientes. Uno de los objetivos de la terapia periodontal es corregir quirúrgicamente las recesiones; se han descrito una variedad de enfoques quirúrgicos como métodos efectivos para cubrir las superficies radiculares expuestas, siendo el injerto libre de tejido conectivo una de las técnicas que hoy en día ofrece un buen porcentaje de éxito y predecibilidad. Se presenta el caso de un paciente con retracción del margen gingival en el maxilar superior derecho; se describe el procedimiento quirúrgico usando una técnica bilaminar empleando un injerto subepitelial de tejido conectivo bajo un colgajo de espesor parcial posicionado coronalmente, y se obtienen buenos resultados estéticos y cobertura radicular.

  1. Sistema radicular do fórmio, sisal e bambu imperial Root systems of new zealand flax, sisal, and imperial bamboo

    Directory of Open Access Journals (Sweden)

    Júlio César Medina

    1963-01-01

    Full Text Available Os autores apresentam e discutem os resultados de estudos preliminares sôbre o sistema radicular do fórmio (Phormium tenax Forster, sisal (Agave sisalana Perrine e bambu .imperial (Bambusa vulgaris Schrad. var. vittata A. ,& C, Riv.. Concluem, que o sistema radicular do fórmio é relativamente raso, o do sisal bastante superficial é o do bambu imperial se limitada às primeiras carnadas do solo.Results of preliminary studies on root-systems of New Zealand flax (Phormium tenax Forster, sisal (Agave sisalana Perrine, and imperial bamboo (Bambusa vulgaris Schrad. var. vittata A. & C. Riv. plants by the method of soil block, are apresented and discussed by the authors. According to local soil conditions, it is concluded that the root-system of New Zealand flax is relatively superficial, with the main concentration of roots in the 12 in. soil top layer. In sisal, the root-systems of the three plants investigated were found to occur in the soil surface layer, with more of 90% of the roots in the top 6 in. Finally, in the imperial bamboo clump atudied, the main concentration of roots was found in the layer 6-12 in. deep.

  2. Disponibilidade de cálcio do leite de búfala irradiado por raios gama
    Calcium availability of buffalo milk irradiated by gamma rays

    Directory of Open Access Journals (Sweden)

    R. C. DALLA DEA

    2010-11-01

    Full Text Available

    O leite de búfala é composto por elevados teores de nutrientes, sendo importante, principalmente, como matéria-prima para elaboração de produtos lácteos e fonte de proteínas e cálcio. O presente trabalho teve por objetivo estudar o efeito dos raios gama na disponibilidade de cálcio no leite de búfala. O leite integral foi irradiado nas doses 0,25; 0,50; 0,75 e 1,0 kGy e também foi avaliado o controle, que não foi submetido ao processo de irradiação. Foram avaliadas composição centesimal e teor de cálcio total no primeiro dia para caracterização do leite utilizado. As análises de diálise de cálcio in vitro ocorreram no primeiro, terceiro, sexto e nono dias de armazenamento a 4ºC. Como resultados para a composição centesimal foram obtidos valores de 4,85% de proteína, 7,00% de gordura, 0,79% cinza e 4,45% carboidratos. O teor de cálcio foi 212,43mg/100mL. A irradiação do leite não alterou a disponibilidade de cálcio.

  3. Hereditariedade e suscetibilidade à reabsorção radicular em Ortodontia não se fundamentam: erros metodológicos e interpretativos repetidamente publicados podem gerar falsas verdades. Análise crítica do trabalho de Al-Qawasmi et al.² sobre a predisposição genética à reabsorção radicular de natureza ortodôntica Heredity and susceptibility to radicular resorption in Odontology do not base: methodological and interpretative repeatedly published mistakes can generate false truths. Critical analysis of Al-Qawasmi work about genetics predisposition to radicular reabsorption of orthodontic kind

    Directory of Open Access Journals (Sweden)

    Alberto Consolaro

    2004-05-01

    Full Text Available O trabalho de Al-Qawasmi et al.², publicado em agosto de 2003 no periódico Journal of Dental Research, procurou estabelecer um gene candidato para a hereditariedade e predisposição genética nas reabsorções dentárias em Ortodontia, mas apresentou e repetiu algumas limitações metodológicas e equívocos na interpretação de seu trabalho anterior de março de 2003¹. Nas conclusões afirmam explicitamente que os achados são preliminares e sugestivos, necessitando de confirmação por meio de estudos adicionais. Os resultados são correlacionados fundamentando-se em dados de outros autores sobre síndromes ósseas associadas a reabsorções por substituição, cervicais externas e não com as reabsorções radiculares externas apicais induzidas ortodonticamente. O gene da reabsorção radicular externa apical relacionada a tratamentos ortodônticos não foi determinado e muito menos a sua natureza hereditária. Nem tampouco, a suscetibilidade à reabsorção radicular em Ortodontia foi detectada ou provada. O trabalho analisado e os demais relacionados com o mesmo tema não conseguiram comprovar suas hipóteses porque ignoram que o primeiro passo para a reabsorção radicular externa é a destruição da camada cementoblástica e isto apenas ocorre a partir da ação de fatores locais. Analisando criticamente estes trabalhos podemos afirmar que procurar o gene da reabsorção radicular e da suscetibilidade a partir de pesquisas em mediadores e células clásticas demonstra a falta de um conhecimento completo e amplo da etiopatogenia deste importante fenômeno biológico, imprescindível para o estabelecimento da premissa dos trabalhos.The study of Al-Qawasmi et al.² published in August 2003 on Journal of Dental Research, aimed to establish a candidate gene for heritability and genetic predisposition to external root resorption in orthodontic patients. This paper, however, presents and repeated some methodological faults and equivocated

  4. Analysis of the Volatile Constituents of Irradiated Apple Juice; Analyse des Constituants Volatils des Jus de Pommes Irradies; Mezhdunarodnyj proekt po oblucheniyu fruktov i fruktovykh sokov; Analisis de los Componentes Volatiles de los Zumos de Manzana Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Dubois, P.; Zenz, H.; Stehlik, G.; Kaindl, K. [Agence Europeenne pour l' Energie Nucleaire, Seibersdorf (Austria)

    1966-11-15

    Degree-Sign C (Head Space Technique de Weurman). Les identifications ont ete faites par comparaison des volumes de retention avec ceux de substances pures, et a l'aide de reactifs chimiques permettant d'eliminer certains constituants de la vapeur. Pour simplifier les analyses, les premiers essais ont porte sur des concentres de jus de pommes ne contenant plus de substances volatiles avant irradiation. Par irradiation, cinq aldehydes prennent naissance dans les jus de pommes: acetaldehyde, isobutyraldehyde, butyraldehyde, isovaleraldehyde et capronaldehyde; mais trois seulement dans les jus concentres; acetaldehyde, isobutyraldehyde et isovaleraldehyde. De plus, la 2-butanone apparait dans les jus concentres, mais le pic qui lui correspond sur les chroma- togrammes est entierement masque par celui de l'ethanol dans le cas des jus non concentres. Par ailleurs on a mis en evidence les formations de furane et de deux composes qui n'apparaissent qu'a l'etat de traces et qui n'ont pas pu etre identifies a ce jour. Des resultats analogues ont ete obtenus par pasteurisation, telle qu'elle est realisee par embouteillage a chaud. (author) [Spanish] Los estudios organolepticos y los ensayos de inocuidad que se realizan dentro del marco del proyecto internacional de investigaciones sobre la conservacion de frutas y zumos de fruta por irradiacion (Seibersdorf) hacen indispensable el analisis de las sustancias aromaticas de los zumos irradiados y no irradiados. Las sustancias volatiles de los zumos de manzana irradiados han sido analizados por cromatografia en fase gaseosa, inyectando directamente los vapores que emiten a la temperatura ambiente y a 60 Degree-Sign C (tecnica 'Head Space' , de Weurman). Las identificaciones se han efectuado comparando los volumenes de retencion con los de sustancias puras y eliminando ciertos constituyentes del vapor con reactivos quimicos. Para simplificar los analisis, los primeros ensayos se han efectuado con concentrados de zumos de manzana que no

  5. Distribuição espacial do sistema radicular do cafeeiro fertirrigado por gotejamento em Campinas Root distribution of fertirrigated coffee trees in Campinas, State of São Paulo, Brazil

    Directory of Open Access Journals (Sweden)

    Carlos Vinícius Garcia Barreto

    2006-01-01

    Full Text Available Este estudo teve como objetivo avaliar o efeito da fertirrigação por gotejamento, utilizando-se emissores com diferentes espaçamentos (0,50 ou 0,80 m e profundidades de instalação (superficial, 0,10 e 0,20 m, na distribuição espacial do sistema radicular do cafeeiro. Observaram-se no cafeeiro irrigado e adubado de forma convencional diferentes condições de desenvolvimento radicular, variando conforme os tratamentos impostos. Para as plantas irrigadas por tubogotejadores com emissores espaçados a cada 0,50 m, a profundidade radicular efetiva foi menor (média de 0,63 m do que a observada para as plantas irrigadas por emissores posicionados a cada 0,80 m (média de 0,70 m. No manejo nutricional por fertirrigação observou-se menor desigualdade na profundidade radicular efetiva entre os tratamentos, bem como, em um aumento médio de 51,1% de densidade de raízes. Houve tendência de manutenção do volume radicular na região próxima aos emissores, enquanto nos pontos mais distantes do desenvolvimento do bulbo úmido, o crescimento radicular foi de 77%. A irrigação das plantas por tubogotejadores enterrados a 0,10 m de profundidade proporcionou maior desenvolvimento radicular em resposta à fertirrigação.This study aimed to evaluate the effect of the drip fertirrigation system, by using emitters with different arranging of spaces (0.50 or 0.80 m and depths of installation (superficial, 0.10 or 0.20 m on the ground, over the root spatial distribution of coffee tree. The coffee tree conventionally irrigated and fertilized presented different conditions of root development, varying according to the treatment imposed. For plants irrigated by emitters spaced every 0.50 m, the effective root depth was smaller (mean of 0.63 m than that observed for plants irrigated by emitters spaced every 0.80 m (mean of 0.70 m. The fertirrigation nutritional management allowed an uniform effective root depth among the treatments, as well as an increase

  6. A STUDY OF ROOT CANAL MORPHOLOGY OF Cebus apella TEETH ESTUDO ANATÔMICO DO CANAL RADICULAR DE DENTES DE Cebus apella

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    Priscilla Rocha Afonso

    2008-12-01

    Full Text Available Realizou-se um estudo anatômico em dentes do Cebus apella, para análise da anatomia interna do canal radicular dessa espécie, normatizando seu uso como modelo experimental. Utilizaram-se doze animais adultos. Após a remoção do tecido orgânico, os dentes foram removidos, seccionados e fotografados, sendo analisados com um estereomicroscópio. Os resultados mostraram que os dentes apresentaram características semelhantes às dos seres humanos, mas com algumas peculiaridades, tais como: a anatomia do canal radicular variou de oval para circular; nos caninos inferiores, os canais são semelhantes a um rim, o que reflete o contorno externo da raiz; nos molares superiores, os canais mesiobucal e distobucal são ovais, seguindo o contorno geral do dente. Os autores concluem que esta espécie pode ser utilizada como modelo em pesquisas odontológicas, principalmente em estudos do tratamento do sistema de canal radicular.

    PALAVRAS-CHAVES: Anatomia, dentes, Cebus apella. An anatomic study of Cebus apella root teeth was performed to analyze the internal anatomy of permanent dentition, normalizing its use as experimental model endodontic research. Twelve adult animals were used in this study. After the removal of the organic tissue, the all teeth were removed, sectioned, analyzed and photographed with a stereomicroscope. The results showed that the anatomy of root canal of this species are similar to human dental anatomy, considering the shape, pathway and number of canals, but with some peculiarities, such as: the root canal anatomy varied from oval to circular; in the lower canines, the canals are resembled a kidney, reflecting the outside contour of the root; in the upper molars, the mesiobuccal and distobuccal canals are oval, following the general contour of the tooth. The authors conclude that this primate can be applied as models for study of root canal treatment in human beings, in special the upper central and lateral incisors

  7. Radicular compression syndrome in the lumbar region resulting from synovial cyst of the small zygapophysical joints. A case report; Lumbales Wurzelkompressionssyndrom bei Synovialzyste des kleinen Wirbelgelenkes

    Energy Technology Data Exchange (ETDEWEB)

    Stimmer, H. [Inst. fuer Roentgendiagnostik, Klinikum rechts der Isar, Technische Univ. Muenchen (Germany); Allgayer, B. [Inst. fuer Roentgendiagnostik, Klinikum rechts der Isar, Technische Univ. Muenchen (Germany)

    1994-12-01

    The formation of a synovial cyst in the small zygapophysial joints is a possibility to be considered in all patients presenting with vague lumbar pains or radicular syndrome, particularly in individuals of advanced age with a prolonged history of disorders classifiable with the so-called ``facet syndrome`` or degenerative changes to the vertebral column. Both computerized tomography and nmr imaging permit a reliable diagnostic differentiation on the basis of the criteria defined above. (orig./MG) [Deutsch] Die Synovialzyste des kleinen Wirbelgelenkes ist als Differentialdiagnose sowohl unspezifischer lumbaler Beschwerden als auch radikulaerer Syndrome zu beruecksichtigen, dies insbesondere bei aelteren Patienten mit laenger bestehenden Beschwerden im Sinne eines sogen. Facettensyndromes und degenerativen Wirbelsaeulenveraenderungen. Computertomographie und Kernspintomographie erlauben unter Beruecksichtigung der beschriebenen Kriterien eine sichere diagnostische Zuordnung. (orig./MG)

  8. Efeito antibacteriano do preparo biomecÃnico e de uma pasta à base de hidrÃxido de cÃlcio sobre bactÃrias presentes em canais radiculares de dentes decÃduos necrosados apÃs trauma

    OpenAIRE

    Denise Lins de Sousa

    2008-01-01

    Um dos principais objetivos do tratamento endodÃntico dos canais radiculares de dentes com polpa necrÃtica consiste em eliminar os microorganismos localizados no sistema de canais radiculares. Dessa forma, esta dissertaÃÃo, constituÃda por um artigo, propÃe-se a avaliar o efeito antibacteriano do preparo quÃmico-mecÃnico e de uma pasta à base de hidrÃxido de cÃlcio sobre bactÃrias presentes em canais radiculares de dentes decÃduos necrosados apÃs trauma bem como verificar a presenÃa dos micro...

  9. Legislation and Identification of Irradiated Foodstuffs; Reglementation et Identification des Denrees Irradiees; Zakonodatel'stvo po obluchennym pishchevym produktam i metody ikh identifikatsii; Legislacion y'Identificacion de los Alimentos Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Lafontaine, A. [Institut d' Hygiene et d' Epidemiologie, Ministere de la Sante Publique, Bruxelles (Belgium)

    1966-11-15

    .Un inventaire des methodes qu'on peut envisager montre la multiplicite des modes d'approche de la question: mesure de l'etat paramagnetique de l'atome, electrophorese, mesure du potentiel d'oxydoreduction, polarographie, spectrophotometrie, chromatographie, colorimetrie, examen microscopique des tissus, modifications immunologiques, microbiologie, modification du materiel d'emballage et modification des caracteres organoleptiques. Jusqu'a present, la spectrophotometrie, la chromatographie, l'electrophorese, les modifications du potentiel d'oxydo-reduction et le dosage de certains produits d'oxydation paraissent les plus prometteurs. Des recherches importantes restent necessaires; elles doivent tenir compte de divers imperatifs: - la methode doit etre aussi specifique que possible, qualitative et, si possible, quantitative; - les resultats doivent provenir d'essais menes parallelement sur des produits irradies, sur des produits non traites et sur des produits conserves par d'autres procedes; - les essais doivent etre etendus dans le temps au moins aussi longtemps que dure la conservation habituelle des denrees avant leur consommation pour se rendre compte si les modifications eventuellement observees se maintiennent, s'accentuent ou disparaissent; - enfin, la methode doit etre aussi universelle que possible, compte tenu de la gamme de denrees pouvant etre irradiees, des modes d'irradiation et des doses utilisees. (author) [Spanish] Las investigaciones sobre irradiacion de alimentos, que al principio tenian un interes puramente militar, han llegado a interesar al sector civil; pronto se procedera a la comercializacion de esos productos irradiados: el principal elemento del conjunto de argumentos aducidos en pro o en contra de tal procedimiento debe ser la proteccion de la salud del consumidor. En vista de las incognitas que impiden formular un juicio definitivo sobre el problema considerado en su totalidad. Belgica ha preferido adoptar el principio de la prohibicion, sin

  10. ACÚMULO DE MASSA SECA E DINÂMICA DO SISTEMA RADICULAR DO ESTILOSANTE MINEIRÃO SUBMETIDO A DUAS INTENSIDADES DE DESFOLHAÇÃO

    Directory of Open Access Journals (Sweden)

    Allan Kardec Braga Ramos

    2006-10-01

    Full Text Available Este trabalho objetivou avaliar os efeitos de duas intensidades de desfolhação (15 e 30 cm sobre a produção de MS, resíduo, área foliar residual (AFR, capacidade de rebrota no escuro (CRE e dinâmica do sistema radicular do estilosante Mineirão (Stylosanthes guianensis cv.Mineirão. As desfolhações foram realizadas de outubro de 2000 a setembro de 2001. O intervalo de cortes foi de 64+ 7 e 82 + 4 dias nas épocas chuvosa e seca do ano, respectivamente. Após análises estatísticas, as médias foram comparadas pelo teste de Tukey (10%. O acúmulo de MS foi afetado pela interação altura x época de desfolhação. No corte a 15 cm, o acúmulo de folhas não diferiu de novembro a abril, mas declinou de 1.700 kg/ha no mês de abril para 317kg/ha no mês de setembro. No resíduo, houve aumento da MS total e da AFR até fevereiro, em ambas as alturas de corte. A densidade das raízes finas (< 2 mm de diâmetro diminuiu na época seca. A CRE foi menor no mês de fevereiro. O corte na altura de 15 cm proporcionou maiores produções de MS de folhas sem afetar o resíduo e o sistema radicular das plantas do estilosantes Mineirão. PALAVRAS-CHAVE: Área foliar, forragem, resíduo, raízes, Stylosanthes guianensis.

  11. Diagnostic utility of selective nerve root blocks in the diagnosis of lumbosacral radicular pain: systematic review and update of current evidence.

    Science.gov (United States)

    Datta, Sukdeb; Manchikanti, Laxmaiah; Falco, Frank J E; Calodney, Aaron K; Atluri, Sairam; Benyamin, Ramsin M; Buenaventura, Ricardo M; Cohen, Steven P

    2013-04-01

      Lumbosacral selective nerve root blocks and/ or transforaminal epidural injections are used for diagnosis and treatment of different disorders causing low back and lower extremity pain. A clear consensus on the use of selective nerve root injections as a diagnostic tool does not currently exist. Additionally, the validity of this procedure as a diagnostic tool is not clear. To evaluate and update the accuracy of selective nerve root injections in diagnosing lumbar spinal disorders. A systematic review of selective nerve root blocks for the diagnosis of low back and lower extremity pain. Methodological quality assessment of included studies was performed using the Quality Appraisal of Reliability Studies (QAREL) checklist. Only diagnostic accuracy studies meeting at least 50% of the designated inclusion criteria were utilized for analysis. Studies scoring less than 50% are presented descriptively and analyzed critically. The level of evidence was classified as good, fair, or limited or poor based on the quality of evidence grading scale developed by the United States Preventive Services Task Force (USPSTF). Data sources included relevant literature identified through searches of PubMed and EMBASE from 1966 to September 2012, and manual searches of the bibliographies of known primary and review articles. In this review, we evaluated studies in which controlled local anesthetic blocks were performed using at least 50% pain relief as the reference standard. There is limited evidence for the accuracy of selective nerve root injections as a diagnostic tool for lumbosacral disorders. There is limited evidence for their use in the preoperative evaluation of patients with negative or inconclusive imaging studies. The limitations of this systematic review include a paucity of literature, variations in technique, and variable criterion standards for the diagnosis of lumbar radicular pain. There is limited evidence for selective nerve root injections as a diagnostic tool in

  12. Produção e caracterização radicular de alfafa (Medicago sativa L. Em função da calagem e gessagem

    Directory of Open Access Journals (Sweden)

    Fábio Yomei Tanamati

    2013-09-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE MicrosoftInternetExplorer4 A alfafa é uma forrageira leguminosa, herbácea perene de clima temperado bastante utilizada na criação de bovinos, equinos e caprinos e exigente em termos de fertilidade do solo. Diante disso objetivou-se quantificar o acúmulo de biomassas verde e seca e caracterizar e quantificar o sistema radicular da alfafa quando submetidas a diferentes níveis de saturação por bases do solo tendo como fonte o calcário e o gesso, para isso realizou-se um experimento a campo com delineamento experimental de blocos ao acaso com parcelas subdivididas, com quatro tratamentos e quatro repetições. Considerou-se as parcelas os tratamentos que foram calculados para atingir a saturação por bases do solo a V=80%, sendo T1- 80% gesso, T2- 80% calcário, T3- 40% calcário + 40% gesso e T4- 80% calcário + 80% gesso, e as subparcelas, três épocas de amostragem, com intervalos de 30 dias. A partir dos resultados concluiu-se que a gessagem e a calagem devem ser analisadas segundo caráter econômico, já que maiores doses não implicam em maiores acúmulos de biomassas verde e seca, que a calagem e a gessagem no solo interferem no crescimento e morfologia radicular da alfafa, a qual apresenta crescimento secundário normal.

  13. Effect of surface treatments on the flexural properties and adhesion of glass fiber-reinforced composite post to self-adhesive luting agent and radicular dentin.

    Science.gov (United States)

    Elnaghy, Amr M; Elsaka, Shaymaa E

    2016-01-01

    This study evaluated the effect of different surface treatments on the flexural properties and adhesion of glass fiber post to self-adhesive luting agent and radicular dentin. Seventy-five single-rooted human teeth were prepared to receive a glass fiber post (Reblida). The posts were divided into five groups according to the surface treatment: Gr C (control; no treatment), Gr S (silanization for 60 s), Gr AP (airborne-particle abrasion), Gr HF (etching with 9 % hydrofluoric acid for 1 min), and Gr M10 (etching with CH2Cl2 for 10 min). Dual-cure self-adhesive luting agent (Rely X Unicem) was applied to each group for testing the adhesion using micropush-out test. Failure types were examined with stereomicroscope and surface morphology of the posts was characterized using a scanning electron microscopy (SEM). Flexural properties of posts were assessed using a three-point bending test. Data were analyzed using ANOVA and Tukey's HSD test. Statistical significance was set at the 0.05 probability level. Groups treated with M10 showed significantly higher bond strength than those obtained with other surface treatments (P C > S > AP > HF. Most failure modes were adhesive type of failures between dentin and luting agent (48.2%). SEM analysis revealed that the fiber post surfaces were modified after surface treatments. The surface treatments did not compromise the flexural properties of fiber posts. Application of M10 to the fiber post surfaces enhanced the adhesion to self-adhesive luting agent and radicular dentin.

  14. Análise da presença do canal cavo-inter-radicular em molares: estudo in vitro = ‘In vitro’ analysis of acessory foramina in molar teeth

    Directory of Open Access Journals (Sweden)

    Cunha, Fernanda Silveira da

    2005-01-01

    Full Text Available Evidências significativas sugerem a inter-relação existente entre a região de furca de dentes multirradiculados com o desenvolvimento de lesões endo-periodontais, principalmente, quando da presença do canal cavo-inter-radicular. Com o objetivo de compreender os mecanismos envolvidos na etiopatogenia de tais doenças periodontais, assim como propiciar o diagnóstico e o tratamento precoces, buscou-se melhor caracterizar essa região dando ênfase à morfologia do assoalho da câmara pulpar. Para este estudo foram selecionados 42 molares humanos extraídos, sendo 21 superiores e 21 inferiores. Após realizadas as aberturas coronárias e localizadas as entradas dos canais radiculares, os dentes tiveram parte das porções coronária e radicular cortada perpendicularmente ao longo do seu eixo, com o auxílio de disco de carburundum. Depois de uma criteriosa limpeza dos espécimes, esses foram secos em câmara de ponto crítico, sendo, a seguir, preparados para análise em microscópio eletrônico de varredura (Philips®, modelo XL30, Holanda. Os dados foram analisados através do Teste U de Mann- Whitney e do teste Qui-quadrado. Com base nos resultados obtidos e de acordo com a literatura pertinente, pôde-se verificar que: 1. o diâmetro e o número de túbulos dentinários encontrados por mm2 assim como a presença de foraminas no assoalho da câmara pulpar sugerem a permeabilidade dessa região; 2. o diâmetro maior de algumas foraminas identifica a presença do canal cavo-inter-radicular

  15. Comparison of Radicular Peroxide Leakage from four Commonly used Bleaching agents following Intracoronal Bleaching in Endodontically treated teeth - An In Vitro Study.

    Science.gov (United States)

    Madhu, Ks; Hegde, Swaroop; Mathew, Sylvia; Lata, DA; Bhandi, Shilpa H; N, Shruthi

    2013-08-01

    Non vital bleaching is simple, conservative procedure for esthetic correction of discolored endodontically treated teeth. The aim of this study was to determine and compare the amount of peroxide leakage from four different bleaching agents i.e superoxol, sodium perborate, combination of superoxol & sodium perborate and carbamide peroxide during intracoronal bleaching, as the safe and effective bleaching is the need of the hour. 50 extracted maxillary centrals were selected for the study. Following standardized protocol access, cleaning and shaping by step back technique and obturation was done using guttapercha and AH plus sealer. Access was sealed with Cavit G and outer root surface was coated with wax and nail varnish. The teeth were separated into crown and root and the root portion was placed in plastic tube containing distilled water for 7days.After incubation, 3mm of gutta-percha was removed below CEJ and 2mm glass ionomer cement base was placed. Grouped into five categories based on the bleaching agent placed in pulp chamber as -group1 (control)-distilled water, group 2-sodium perborate with distilled water , group 3- 30% hydrogen peroxide ,group 4-mixture of sodium perborate and 30% hydrogen peroxide and group 5-10% carbamide peroxide gel. Peroxide leakage was measured after 24hrs using ferrothiocyanate method and optical density using spectrophotometer. Statistical analysis of the data was conducted using ANOVA and multiple comparisons within the groups was done using BONFERRONI method (Post-Hoc tests). The results showed highest peroxide penetration from 30% hydrogen peroxide followed by mixture of sodium perborate with 30% hydrogen peroxide, mixture of sodium perborate with distilled water and least penetration from 10% carbamide peroxide gel. The results were statistically significant. Radicular peroxide leakage in 10% carbamide peroxide was significantly lower than the other tested bleaching agents making it a very safe alternative for intracoronal

  16. Enucleación de quiste periapical simultáneo a la obturación del sistema de conductos radiculares

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    Lida Velazque

    Full Text Available Introducción: los quistes periapicales representan el tipo más frecuente dentro de los quistes odontogénicos. Su origen está relacionado con una necrosis pulpar y un consecuente estímulo de los restos epiteliales del ligamento periodontal (Malassez. Objetivo: describir un caso clínico de enucleación de quiste periapical simultáneo a la obturación del sistema de conductos radiculares. Presentación del caso: paciente de sexo femenino, 67 años de edad, sin alteraciones sistémicas; buscó atención odontológica por presentar dolor dental y acúmulo de alimentos en la región de molares inferiores del lado izquierdo. Al examen clínico se observó caries extensa en el segundo molar inferior izquierdo con compromiso de furca, ausencia de aumento de volumen vestibular, sin fistula; en la radiografía periapical se evidenció lesión cariosa extensa recidivante en el segundo molar inferior izquierdo, y primer molar inferior izquierdo con tratamiento endodóntico y presencia de área radiolúcida de contornos bien definidos en la región periapical compatible con quiste periapical. El tratamiento estuvo a cargo de un equipo multidisciplinario por lo que se decidió realizar exodoncia del segundo molar inferior izquierdo y cirugía paraendodóntica con enucleación quirúrgica simultánea a la obturación del sistema de conductos radiculares primer molar inferior izquierdo; el examen histopatológico de la muestra extraída comprobó tratarse de un quiste periapical. Se realizó seguimiento radiográfico dos años después y mostró un completo reparo óseo del área afectada. Conclusiones: se concluye que el tratamiento descrito constituye una alternativa válida para la resolución de casos donde la endodoncia convencional es limitada para mantener la función y estética de una pieza dentaria.

  17. Efeitos de sistemas de cultivo na densidade e macroporosidade do solo e no desenvolvimento radicular do milho em latossolo roxo Effects of tillage systems on bulk density, aeration porosity and root development of corn in a typic haplorthox soil

    Directory of Open Access Journals (Sweden)

    Paulo César Corsini

    1999-02-01

    Full Text Available Neste trabalho foram estudados os efeitos imediato e residual de dois sistemas de preparo na densidade e macroporosidade do solo e no desenvolvimento radicular do milho (Zea mays L., em camadas estruturalmente estabilizadas de um Latossolo Roxo, mantido por longo período sob plantio direto de milho. Os efeitos imediatos das operações envolvendo a subsolagem e a aração e gradagem aumentaram, em menos de um ano agrícola, a macroporosidade da camada superficial desse solo bem como o potencial de desenvolvimento radicular. Nesses tratamentos e nos três primeiros anos agrícolas, a adoção contínua do sistema de plantio direto diminuiu a porosidade de aeração do solo e o potencial de desenvolvimento radicular do milho. Os benefícios da manutenção desse sistema conservacionista nos valores de macroporosidade e densidade na camada superficial do solo iniciaram-se no quarto ano agrícola. A partir daí aumentaram, atingindo no oitavo ano agrícola consecutivo valores semelhantes aos imediatamente obtidos após as operações mecânicas realizadas na instalação do experimento. As relações entre desenvolvimento radicular, densidade e macroporosidade do solo foram estabelecidas por equações bem como por classes de desenvolvimento radicular.The objective of this study was to evaluate the immediate and the residual effects of soil preparation on bulk density, aeration porosity and root development relationships in stabilized structural layers of a typic Haplorthox soil due to long-term no-tillage system of corn (Zea mays L..The immediate effects of soil preparation to planting involving subsoiling, plowing, and disking improved soil macroporosity and root development for a short period of time. In these treatments and on the first three consecutive years, the adoption of continuous no-tillage management decreased soil macroporosity and root development. The long-term benefits of continuous no-tillage on soil macroporosity initiated at the

  18. A Comparative Analysis of Cytokeratin 18 and 19 Expressions in Odontogenic Keratocyst, Dentigerous Cyst and Radicular Cyst with a Review of Literature

    Science.gov (United States)

    Shah, Vandana Sandip; Ghanchi, Mohsin Jiva; Gosavi, Sandesh Sachchidanand; Srivastava, Himanshu Mahesh; Pachore, Nivedita Javahir

    2016-01-01

    Introduction Odontogenic cysts viz Odontogenic Keratocyst (OKC), Dentigerous Cyst (DC) and Radicular Cyst (RC) occur commonly in the oral and maxillofacial region. Cytokeratin (CK) expression studies have been done to evaluate diagnostic accuracy, role in pathogenesis, elucidate behaviour and role in treatment protocols. However, variations have been reported in the expression of CK patterns in these odontogenic cysts, which could be due to the lack of standardization of laboratory techniques. The present study has tried to shed light on CK 18 and 19 expression in odontogenic cysts and offer the brief review of previous studies on these CK. Aim The aim of the present study was to evaluate the intensity and expression patterns of CK 18 and 19 in OKCs, DCs and RCs. Materials and Methods A total of 60 cases, 20 each of OKC, DC and RC were confirmed histologically and evaluated for immunohistochemical expression pattern and intensity of CK 18 and 19. Results A focal and variable expression of CK 18 was observed in 25% of OKCs, 15% of DCs and 10% of RCs. CK 19 was expressed in 75% of OKCs and 100% in DCs as well as RCs. Conclusion The intensity and expression of Cytokeratin 19 was more in all three cysts compared to Cytokeratin 18. PMID:27630961

  19. Sistema radicular de plantas cítricas e atributos físicos do solo em um Latossolo argiloso submetido à escarificação

    Directory of Open Access Journals (Sweden)

    Bordin Ivan

    2005-01-01

    Full Text Available O trabalho teve como objetivo avaliar a influência da escarificação sobre atributos físicos do solo e sobre a distribuição do sistema radicular do limão ?Cravo? (Citrus limonia Osb sob copa de laranja ?Pêra? (Citrus sinensis L. Osb. Foram abertas quatro trincheiras para cada tratamento (entrelinha escarificada e entrelinha não escarificada avaliando-se distribuição das raízes na linha e entrelinha até a profundidade de 1,0 m pelo Sistema Integrado de Análise de Raízes e Cobertura do Solo (SIARCS 3.0. A porosidade total e a densidade do solo foram avaliadas em três profundidades (0,000-0,125; 0,125-0,250 e 0,25-0,375 m em três posições: linha, centro da entrelinha e limite da copa na entrelinha. Três anos depois da escarificação não se detectou alteração para a densidade e a porosidade total do solo nas entrelinhas do pomar e a quantidade de raízes, independentemente da profundidade e posição em relação à planta.

  20. Atributos do solo e biomassa radicular após quatro anos de semeadura direta de forrageiras de estação fria em campo natural dessecado com herbicidas

    Directory of Open Access Journals (Sweden)

    E. Pérez Gomar

    2002-03-01

    Full Text Available Os campos naturais, desenvolvidos sobre solos arenosos da região norte do Uruguai, são compostos por espécies forrageiras, sobretudo de gramíneas de produção estacional, com baixa produtividade no inverno. O objetivo deste estudo foi avaliar o efeito da dessecação do campo natural no estabelecimento de espécies de estação fria em atributos do solo e biomassa radicular. O estudo, iniciado em 1994, utilizou delineamento experimental de blocos ao acaso com parcelas subsubdivididas, com três repetições. Nas parcelas principais, em 1994, foram aplicados os tratamentos com herbicidas (paraquat 0,60gha-1i.a., glifosate 0,36gha-1i.a. e glifosate 1,44gha-1i.a. e testemunha sem herbicida em campo natural para a semeadura de pastagens de inverno. Nessas parcelas, a pastagem de inverno foi aveia preta (avena strigosa L., triticale (X Triticosecale Wittmack e azevém (Lolium multiflorum L.. As subparcelas foram formadas pela reaplicação ou não dos herbicidas em 1995 e as subsubparcelas foram formadas pela reaplicação ou não dos herbicidas em 1996. As amostras de solo para determinar a biomassa radicular, a densidade do solo, o carbono (C orgânico do solo, bases trocáveis, Al trocável e o pH do solo foram extraídas separadamente, em três subamostras, usando cilindro metálico de 7,65cm de diâmetro e 40cm de comprimento. Os monolitos extraídos foram estratificados até 30cm de profundidade nas camadas de 0-5, 5-10, 10-15, 15-20 e 20-30cm. A biomassa radicular foi maior na testemunha do que a média dos tratamentos com herbicidas somente na camada de 0-5cm, e, entre os tratamentos com herbicidas, a biomassa radicular foi maior com paraquat do que com o glifosate. A reaplicação de herbicidas, em 1995 e 1996, também ocasionou redução da biomassa radicular. Houve alta correlação positiva de C orgânico com a biomassa radicular. A redução de C orgânico para o tratamento mais agressivo de controle químico (glifosate 1,44gi

  1. Sistema radicular de plantas de cobertura sob compactação do solo Root system of cover crops under soil compaction

    Directory of Open Access Journals (Sweden)

    Wainer G. Gonçalves

    2006-04-01

    Full Text Available Com o objetivo de avaliar a capacidade de crescimento de raízes em camadas de solo compactadas, quatro espécies de plantas de cobertura (amaranto, milheto ADR 500, capim pé-de-galinha e kenaf foram cultivadas em anéis de PVC, com níveis de compactação em subsuperfície (densidade do solo: 1,18; 1,34; 1,51 e 1,60 Mg m-3, sendo o experimento conduzido em casa de vegetação, utilizando-se de um Latossolo Vermelho distroférrico. A camada compactada em subsuperfície foi restritiva ao crescimento de raízes das espécies estudadas, ocasionando a concentração de raízes na camada superficial. O milheto ADR 500 e o amaranto foram as espécies que se destacaram na produção de massa seca da parte aérea e conseguiram desenvolver-se nas camadas compactadas e abaixo delas. O milheto ADR500 apresentou maior densidade de comprimento radicular em todas as camadas. O capim pé-de-galinha e o amaranto tiveram comportamento semelhante quanto à densidade de comprimento radicular. O capim pé-de-galinha e o kenaf apresentaram menor massa seca de raízes em relação às demais espécies. O kenaf apresentou menores valores de massa seca da parte aérea, mas não foi afetado pela presença de camadas compactadas.With the objective of evaluate the root growth capacity in the compacted soil layer, four vegetal species of the cover crops (amaranth, pearl millet ADR500, finger millet and kenaf were cultivated in columns of PVC with increasing levels of subsurface compaction (soil bulk densities: 1.18; 1.34; 1.51 and 1.60 Mg m-3. The experiment was carried out in a greenhouse conditions, using a Dusky Red Latosol. The subsurface compacted layer was restrictive to the roots growth of the studied species, causing the root concentrating to the surface. Pearl millet ADR500 and the amaranth were the species that had detached in the production of dry matter weight and developed itself in the compacted layers and below of them. Pearl of millet ADR500 presented the

  2. Sustained Local Release of Methylprednisolone From a Thiol-Acrylate Poly(Ethylene Glycol) Hydrogel for Treating Chronic Compressive Radicular Pain.

    Science.gov (United States)

    Slotkin, Jonathan R; Ness, Jennifer K; Snyder, Kristin M; Skiles, Amanda A; Woodard, Eric J; OʼShea, Timothy; Layer, Rick T; Aimetti, Alex A; Toms, Steven A; Langer, Robert; Tapinos, Nikos

    2016-04-01

    A preclinical animal model of chronic ligation of the sciatic nerve was used to compare the effectiveness of a slow-release hydrogel carrying methylprednisolone to methylprednisolone injection alone, which simulates the current standard of care for chronic compressive radiculopathy (CR). To extend the short-term benefits of steroid injections by using a nonswelling, biodegradable hydrogel as carrier to locally release methylprednisolone in a regulated and sustained way at the site of nerve compression. CR affects millions worldwide annually, and is a cause of costly disability with significant societal impact. Currently, a leading nonsurgical therapy involves epidural injection of steroids to temporarily alleviate the pain associated with CR. However, an effective way to extend the short-term effect of steroid treatment to address the chronic component of CR does not exist. We induced chronic compression injury of the sciatic nerves of rats by permanent ligation. Forty-eight hours later we injected our methylprednisolone infused hydrogel and assessed the effectiveness of our treatment for 4 weeks. We quantified mechanical hyperalgesia using a Dynamic Plantar Aesthesiometer (Ugo Basile, Stoelting Co., IL, USA), whereas gait analysis was conducted using the Catwalk automated gait analysis platform (Noldus, Leesburg, VA, USA). Macrophage staining was performed with immunohistochemistry and quantification of monocyte chemoattractant protein-1 in sciatic nerve lysates was performed with multiplex immunoassay using a SECTOR Imager 2400A (Meso Scale Discovery, Rockville, MA, USA). We demonstrate that using the hydrogel to deliver methylprednisolone results in significant (P pain in an animal model of chronic CR. Our steroid-infused hydrogel could be an effective extender of the short-term benefits of epidural steroid injections for patients with chronic compression-induced radicular pain. N/A.

  3. [Immunoexpression and clinical significance of interleukin-21 and receptor activator of nuclear factor κB ligand in human periapical granulomas and radicular cysts].

    Science.gov (United States)

    Hu, Juhua; Li, Qian; Wang, Yanqing; Li, Song

    2015-06-01

    This study aimed to detect the immunoexpression of interleukin-21 (IL-21) and receptor activator. of nuclear factor KB ligand (RANKL) in periapical granulomas (PGs) and radicular cysts (RCs). The interaction of IL-21 with RANKL and its role in periapical pathogenesis were also speculated. A total of 32 PGs and 23 RCs were selected as experimental samples. Lesion size and occurrence of tenderness were recorded. Up to 10 healthy gingival tissues were collected as normal control samples. All tissues were subjected to immunohistocheincal analysis with anti-human IL-21 and RANKL polyclonal antibodies. The correlations of IL-21 with RANKL, lesion size, and the occurrence of tenderness of the PGs and RCs were evaluated. IL-21-positive cells were detected in all periapical lesion tissues but not in normal tissues. In the cyst group and granuloma group, the corresponding expression levels of IL-21 were 59.92±6.57 and 36.80± 6.81, whereas those of RANKL were 68.81±18.59 and 36.12±14.87, respectively. Moreover, t-test revealed a significantly higher expression of IL-21 and RANKL in RCs than in PGs (P<0.05). IL-21 and RANKL were positively correlated in both PGs and RCs (P<0.05). Furthermore, IL-21 was correlated with lesion size (P<0.05). This study demonstrated that IL-21 is potentially involved in the pathogenesis of apical periodontitis lesions. A role in the exacerbation of chronic inflammation, as well as in bone resorption, is suspected. Further studies are required to elucidate the specific functions of IL-21 in periradicular inflammatory processes.

  4. Alterações químicas e nutricionais do grão-de-bico (Cicer arietinum L. cru irradiado e submetido à cocção Nutritional and chemical alteration of raw, irradiated and cooked chickpea (Cicer arietinum L.

    Directory of Open Access Journals (Sweden)

    Andréa Cristina Penati Ferreira

    2006-03-01

    Full Text Available O presente trabalho teve por objetivos analisar, em grãos não submetidos à irradiação, a composição centesimal e mineral, para verificar as alterações provocadas pela cocção. Em grãos crus e cozidos, não irradiados (controle e irradiados (doses de 2, 4, 6, 8 e 10 kGy, foram realizadas também as análises de: disponibilidade de ferro in vitro, digestibilidade da proteína in vitro e perfil de aminoácidos. Os resultados das análises dos minerais demonstraram que ocorreu diminuição significativa (pThe work objective was analyzing, in chickpea seeds not irradiated, the centesimal and mineral composition to verifying the alterations on the nutritional characteristics caused by the cooking process. Also were carried out analysis of the iron availability in vitro, protein digestibility in vitro and the profile of amino acids in the raw and cooked in the control and irradiated seeds (doses of 2, 4, 6, 8 and 10 kGy. The results of the mineral analysis showed that only phosphorus decrease significantly (p<0.05 with cooking process. At the centesimal composition, ash and carbohydrates available decreased significantly (p<0,05. In the control and in the doses of 4 and 6 kGy the cooking hasn't influenced the digestibility of the protein, but the treatments that received radiation doses of 2, 8 and 10 kGy were influenced. The cooked chickpea has shown better digestibility in higher doses of radiation although the treatments have shown low digestibility. The raw chickpea presented a better dialysis of iron in the control and in the doses 2 and 4 kGy and the cooked chickpea presented improvement according to the increase of radiation doses. In relation to essential amino acids, chickpea has presented an adequate nutritional value, except for methionine.

  5. Arquitetura do sistema radicular do porta-enxerto de videira 'IAC 766' na época de transplante do viveiro para o campo Root architecture of IAC 766 grapevine rootstock in the transplanting from the nursery to the field

    Directory of Open Access Journals (Sweden)

    Ricardo Sfeir de Aguiar

    2006-12-01

    Full Text Available Na propagação de porta-enxertos de videira por estaquia em recipientes para posterior transplante ao campo, é importante evitar danos ao sistema radicular. O objetivo do trabalho foi determinar, por meio da avaliação da arquitetura do sistema radicular, a melhor fase de desenvolvimento da muda para o transplante, ao campo, do porta-enxerto de videira 'IAC 766' Campinas, em Marialva - PR. As plantas foram avaliadas aos 60; 90; 120; 150 e 180 dias após a estaquia lenhosa em substratos contidos em sacos plásticos de 20cm de largura por 30cm de altura. As raízes foram expostas e fotografadas, avaliando-se comprimento e área do sistema radicular pelo programa SIARCS 3.0. Foi utilizado também um diagrama de arquitetura radicular, atribuindo-se notas à conformação do sistema radicular e foi contado o número de raízes enoveladas. O delineamento experimental utilizado foi o de blocos inteiramente ao acaso, com cinco tratamentos e cinco repetições, com 10 plantas por parcela. Os dados foram submetidos à análise de regressão polinomial. Todas as características, com exceção das notas da arquitetura do sistema radicular, ajustaram-se ao modelo de regressão linear crescente. A melhor fase para o transplante da muda do porta-enxerto 'IAC 766' para o campo é aos 90 dias após a estaquia.In grapevine propagation with cuttings in containers it is important to avoid damages to root system during transplanting to the field. The aim of this research was to determine, by means of root system evaluation, the best period to transplant 'IAC 766' (Campinas rootstock. The trial was set up in July 2004 in Marialva County (PR. The plants were evaluated 60, 90, 120, 150 and 180 days after the establishment of woody cutting in plastic bags of 20cm wide and 30cm high. The roots were exposed and pictures were taken in lateral and top positions and were evaluated by SIARCS 3.0 software, with determination of the area and the length of the root system

  6. Avaliação microbiológica e sensorial da vida-útil de cortes de peito de frango irradiados Microbiological and sensory evaluation of the shelf-life of irradiated chicken breast meat

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    L. Miyagusku

    2003-12-01

    Full Text Available Caixas de papelão contendo cortes de peito de frango sem pele e sem ossos, previamente acondicionadas em bandejas de polietileno expandido, com aproximadamente 200 gramas por bandeja e recobertas por filme de polietileno, foram submetidas à irradiação com 60Co, utilizando-se equipamento Nordion JS 7500. As amostras foram expostas a doses de 1,5; 3,0 e 7,0kGy, sendo irradiadas na modalidade estática a 0º e 180º em relação ao feixe de irradiação. Para avaliar a homogeneidade das doses de irradiação um conjunto de 18 dosímetros de alanina+parafina por tratamento foi colocado dentro das caixas com as amostras. Outro conjunto de dosímetros foi irradiado na faixa de 1 a 10kGy para elaboração da curva de resposta . Após a irradiação, os peitos de frango foram armazenados a 5±1ºC durante 39 dias, sendo submetidos a análises microbiológicas (contagem total de bactérias aeróbias psicrotróficas, bactérias aeróbias mesófilas, bolores e leveduras, Pseudomonas spp, enterobacteriáceas totais, bactérias lácticas e NMP de E.coli em 10 períodos diferentes ao longo do armazenamento. Os resultados obtidos revelaram um comportamento linear dos dosímetros de alanina+parafina na faixa de 1 a 10kGy de irradiação. Com base nas avaliações microbiológicas as amostras controle tiveram vida-útil de 5 dias, observando-se um ganho na vida-útil de 1,75; 4,40 e 7,0 vezes para as amostras irradiadas com 1,5; 3,0 e 7,0kGy, respectivamente. Constatou-se uma alteração crescente do odor de queimado à medida que se aumentavam as doses de irradiação, indicando a dose de 3kGy como a mais recomendável para se garantir um produto com maior vida-útil e sem alterações sensoriais perceptíveis.Kraft paper boxes containing 10 expanded polystyrene trays with 200g skinless deboned chicken breast each were irradiated with 60Co source of a Nordion JS7500 irradiator. The trays were previously wrapped with polyethylene film. The samples were

  7. Effect of lincomycin treatment of root surface in dental replantation: a study in rats = Efeito da lincomicina como tratamento da superfície radicular no reimplante de dentes: estudo em ratos

    Directory of Open Access Journals (Sweden)

    Silva, Daniela Nascimento

    2009-01-01

    Full Text Available Objetivo: Estudos sobre antibióticos usados topicamente na superfície radicular de dentes avulsionados buscam avaliar suas propriedades anti-reabsortivas que favoreçam o reparo do ligamento periodontal e o restabelecimento da articulação dentoalveolar. Neste mesmo propósito, esta pesquisa avaliou o efeito da lincomicina na superfície radicular, antes do reimplante. Metodologia: Dez ratos foram distribuídos em dois grupos de 05 animais (I – controle e II – experimental. O incisivo superior direito dos animais foi extraído e estocado em leite por 30 min. Em seguida, no grupo I, os dentes foram irrigados com soro fisiológico e reimplantados; no grupo II, os incisivos foram imersos em lincomicina por 5 min, antes do reimplante. Os animais foram eutanasiados no 21º dia pós-operatório e a hemimaxila direita submetida a cortes histológicos, corados em HE, para avaliação microscópica. Resultados: No grupo I, o ligamento periodontal apresentou-se disperso, com infiltrado linfoplasmocitário moderado a intenso e a articulação dentoalveolar não foi restabelecida; no grupo II, notou-se completo reparo do ligamento, poucas células inflamatórias e pequenas áreas de reabsorção inflamatória e anquilose. Conclusões: o uso tópico da lincomicina no tratamento da superfície radicular promoveu o reparo do ligamento periodontal, reduziu o processo inflamatório, mas ainda foram observadas áreas de reabsorção inflamatória e anquilose

  8. \\"Avaliação da desinfecção da dentina radicular em profundidade provocada pela irradiação do laser de diodo de alta potência\\"

    OpenAIRE

    Eliana Barbosa de Souza

    2007-01-01

    A presença de microrganismos no interior do sistema de canais radiculares é a principal causa do fracasso na terapia endodôntica. A importância da sanificação durante o preparo do canal fica clara, portanto. Dentre os microrganismos isolados nos casos de insucesso o Enterococcus faecalis é comumente encontrado. O E. faecalis é um microrganismo resistente à terapia endodôntica, à medicação intracanal de hidróxido de cálcio e sua presença contribui para o insucesso em Endodontia. A radiação las...

  9. Detecção de fraturas radiculares em imagens de tomografia computadorizada de feixe cônico utilizando diferentes parâmetros de exposição e materiais intracanais

    OpenAIRE

    Pinto, Martina Gerlane de Oliveira

    2015-01-01

    O objetivo deste estudo foi avaliar a detecção de fraturas radiculares (FRs) em imagens de Tomografia Computadorizada de Feixe Cônico (TCFC) utilizando diferentes parâmetros de exposição e analisar a influência da guta- percha, do núcleo metálico fundido e do pino de fibra de vidro no diagnóstico das FRs, assim como a formação de artefatos em TCFC. Cento e sessenta dentes foram selecionados e divididos em quatro grupos de acordo com o material de preenchimento (sem guta-percha, com guta-perch...

  10. Remoção da smear layer dos canais radiculares em função das técnicas de instrumentação e irrigação endodônticas = Remoción del barrillo dentinario en los conductos radiculares en función de las técnicas de instrumentación e irrigación endodóncicas

    OpenAIRE

    Coelho da Silva, Fausto Miguel Tadeu

    2012-01-01

    1 - Introducción El concepto de tratamiento endodóncico se basa en la instrumentación, limpieza, desinfección y obturación de los conductos radiculares. Con el fin de mejorar estos aspectos, algunos investigadores crearon nuevos planteamientos, técnicas e instrumentos, logrando un gran progreso para la Endodoncia. Ésta, como toda ciencia, tuvo una gran evolución en el siglo pasado y consiguió tener un elevado grado de desarrollo, no solo en sus bases biológicas sino también en el desarro...

  11. Bioatividade de ácidos húmicos: efeitos sobre o desenvolvimento radicular e sobre a bomba de prótons da membrana plasmática

    Directory of Open Access Journals (Sweden)

    Façanha Arnoldo Rocha

    2002-01-01

    Full Text Available A bioatividade de ácidos húmicos (AH isolados de lodo da estação de tratamento de esgoto (AHL e de vermicomposto (AHV foi avaliada pela ação dessas substâncias sobre o transporte de prótons através da membrana plasmática de células de raízes de café e milho e sua relação com o desenvolvimento dessas espécies. Houve estímulo da área superficial radicular em ambas as espécies cultivadas com ambos AH, mostrando uma concentração ótima em torno de 40 mg L-1. Nessa condição, os tratamentos com AHL e AHV estimularam a H+-ATPase de membrana plasmática em plântulas de café e milho. Os AHL foram mais efetivos na promoção desses efeitos do que os AHV. A modificação do perfil cromatográfico dos AH em solução antes e após o cultivo das plântulas revelou que a interação planta-AH promoveu uma redistribuição das massas moleculares dessas substâncias, sugerindo uma dinâmica de mobilização de subunidades funcionais dos AH por exsudatos das raízes. A análise estrutural dos AH detectou a presença de grupamentos de auxina. A análise comparativa da ação desses dois AH sobre as espécies representantes de plantas monocotiledôneas (milho e dicotiledôneas (café apontam para a ativação da H+-ATPase de plasmalema como possível marcador metabólico de bioatividade dos ácidos húmicos.

  12. Endodontic-periodontal management of two rooted maxillary lateral incisor associated with complex radicular lingual groove by using spiral computed tomography as a diagnostic aid: a case report.

    Science.gov (United States)

    Gandhi, A; Kathuria, A; Gandhi, T

    2011-06-01

    To present the successful endodontic and periodontal management of a two rooted maxillary lateral incisor tooth with a complex radicular lingual groove and severe periodontal destruction using spiral computed tomography as a diagnostic aid. A 30-year-old male patient presented with a chief complaint of mobility and discharge of pus in an upper front tooth. Clinical examination revealed a sinus tract on the labial gingival surface and a 10-mm-deep periodontal pocket associated with maxillary left lateral incisor tooth. On the lingual side, a groove emerging from cingulum, continuing mesioapically down the lingual aspect of tooth was found. Intraoral periapical radiographs demonstrated a lateral periodontal defect around the mesial aspect and a diffuse radiolucency at the apex of maxillary left lateral incisor tooth. The sinus tract was traced with gutta-percha to the maxillary left lateral incisor that showed an accessory root surrounded by a large radiolucent area. A spiral computed tomographic scan for better understanding of the complicated root canal morphology of the tooth was performed. Based on the clinical, radiographic and spiral computed tomographic findings, a diagnosis of an endo-perio lesion in tooth 22 was made. Management consisted of conventional root canal treatment, radiculoplasty, root resection of accessory root and surgical curettage of the periodontal defect. Follow-up with radiographic examination at 3 months and 1 year was performed. At 1-year recall, the patient was asymptomatic, there was no evidence of the sinus tract and a 3-mm nonbleeding pocket was present in relation to tooth 22. Progression of hard tissue healing was observed in the periapical radiograph taken 1 year postoperatively. The key to achieving favourable results in this particular type of developmental anomaly is accurate diagnosis and treatment planning. The health of the periapical osseous tissues appears to be the provital factor for tooth retention. A favourable outcome

  13. Densidade do sistema radicular da bananeira 'Pacovan' sob irrigação por aspersão Root system density of 'Pacovan' banana plant under sprinkler irrigation

    Directory of Open Access Journals (Sweden)

    Raimundo Lacerda Filho

    2004-12-01

    Full Text Available O presente trabalho foi realizado no município de Governador Dix-Sept Rosado, microrregião Açu-Apodi, no Estado do Rio Grande do Norte, tendo como objetivo verificar os efeitos do sistema de irrigação por aspersão na densidade do sistema radicular da bananeira 'Pacovan'. O delineamento experimental utilizado foi o de blocos casualizados, em esquema de parcelas subdivididas, com cinco repetições. Os tratamentos foram duas amostragens por planta, realizadas do lado contrário ao da emissão da inflorescência, formando um ângulo de 45º. Em cada amostragem, foram realizadas quatro retiradas do material de solo a distâncias de 20 cm, sendo a primeira a 30 cm e a última a 90 cm do pseudocaule. A análise dos dados demonstrou que ocorreu redução linear no peso fresco e na densidade de comprimento de raízes da bananeira em função da profundidade do solo. Em relação à distância do pseudocaule da bananeira, tanto o peso fresco quanto a densidade de comprimento de raízes não mostraram resultados significativos.The present work was conducted at Governador Dix-Sept Rosado County, microregion Açu-Apodi, in the state of Rio Grande do Norte and its objective was to study the effects of sprinkler irrigation system on the density of the root system of 'Pacovan' banana plants. The experiment followed a completely randomized block design, in a split-plot scheme, with five replications. The treatments were two sampling groups, taken per plant, and in the opposite side of the inflorescence emission, forming between them an angle of 45°. In each sampling group, four samples containing soil material were collected at intervals of 20 cm, so the first was distant 30 cm and the last 90 cm from the pseudostem. Data analysis showed that occurred a linear reduction in root fresh weight and in lenght of roots density, in replications to soil depth. For the distance from the plant pseudostem there were no significant differences between samples, both

  14. Controle biológico da podridão radicular (Pythium aphanidermatum e promoção de crescimento por Pseudomonas chlororaphis 63-28 e Bacillus subtilis GB03 em alface hidropônica

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    Élida Barbosa Corrêa

    2010-12-01

    Full Text Available Podridões radiculares causadas por espécies de Pythium são um importante problema em cultivos hidropônicos. Sintomas de subdesenvolvimento são observados nas plantas parasitadas pelo patógeno, sendo muitas vezes não diagnosticados pelo produtor. O objetivo do trabalho foi avaliar o controle biológico da podridão radicular causada por Pythium aphanidermatum e a promoção de crescimento por Pseudomonas chlororaphis 63-28 e Bacillus subtilis GB03, reconhecidos agentes de controle biológico de doenças de plantas. A inoculação das plantas com P. aphanidermatum ocasionou o subdesenvolvimento, sendo essa diminuição de 20%. A adição dos agentes de biocontrole na solução nutritiva teve um efeito positivo no aumento da massa (6% a 13%, no número de folhas (4% a 7% e no teor de clorofila (3% das plantas de alface. Entretanto, maiores estudos devem ser realizados para melhorar a capacidade de controle da doença e de promoção de crescimento pelos agentes de biocontrole estudados no cultivo de alface hidropônica.

  15. INTERAÇÃO DO CALCÁRIO E DO SILICATO DE CÁLCIO E MAGNÉSIO COM GESSO AGRÍCOLA NO DESENVOLVIMENTO RADICULAR DE Panicum maximum JACQ. CV. CAPIM MOMBAÇA

    Directory of Open Access Journals (Sweden)

    Vinícius Faúla Aguiar

    2017-01-01

    Full Text Available O objetivo do trabalho é avaliar o efeito das correções do solo efetuadas com calcário e silicato de cálcio e magnésio no desenvolvimento radicular de Panicum maximum Jacq. Cultivar capim Mombaça. Foi adotado delineamento experimental em blocos ao acaso, em esquema fatorial 2x5, sendo estudado em quatro blocos o efeito de duas fontes de corretivo e cinco métodos de aplicação, além da testemunha. Nas análises onde foi observada significância estatística, realizou-se teste de Tukey a 5,0% de probabilidade. A unidade experimental é constituída por colunas de tubos de PVC de 15 centímetros de diâmetro por 60 cm de altura, dividida em seis anéis de 10 centímetros, totalizando 44 unidades. Depois de secas em estufa com circulação forçada de ar a 65 ºC até atingir peso constante as raízes foram pesadas em balança de precisão. O T2 resultou em maior incremento de massa seca. O crescimento radicular na faixa de 0 a 20 cm se mostrou superior às faixas de 20 a 40 e 40 a 60 cm.

  16. Calagem na nutrição de cálcio e no desenvolvimento do sistema radicular da goiabeira Effect of the liming on the nutrition and the development of the guava root system

    Directory of Open Access Journals (Sweden)

    Renato de Mello Prado

    2004-10-01

    Full Text Available A aplicação de calcário em solos ácidos promove maior desenvolvimento do sistema radicular das plantas e consequentemente, melhora a absorção de água e nutrientes. O objetivo deste trabalho foi avaliar os efeitos da aplicação de calcário no solo, no desenvolvimento do sistema radicular e na nutrição de cálcio de goiabeiras cultivadas em um Latossolo Vermelho distrófico ácido. Analisaram-se amostras de solo coletadas em quatro pontos eqüidistantes, a 75 cm do tronco, nas camadas de 0-20 e 20-40 cm de profundidade, de parcelas que receberam 0, 3,7 e 7,4 t ha-1 de calcário. O calcário foi aplicado em pré-plantio, incorporado com arado de aivecas e grade aradora, na camada de 0-30 cm de profundidade. Durante o segundo e o terceiro ano de cultivo da goiabeira, avaliaram-se os efeitos da calagem nas propriedades químicas do solo. Aos 42 meses após a incorporação do calcário (terceiro ano de cultivo da goiabeira, realizou-se a amostragem das raízes com trado cilíndrico serrilhado para a avaliação da matéria seca e do teor de cálcio radicular e e também realizou-se a amostragem de folhas. A calagem promoveu a correção da acidez do solo, aumentando a saturação por bases, com conseqüente incremento da disponibilidade e absorção de cálcio pela planta, proporcionando maior desenvolvimento do sistema radicular da goiabeira. Concentrações de cálcio próximas de 30 mmol c dm-3 no solo e teor desse nutriente de 7,5 g kg-1 nas raízes, estiveram associados ao maior crescimento radicular da goiabeira.The application of lime in acid soils improves the plant root system and, consequently, enhances water and nutrients absorption by the plants. The objective of this work was to evaluate the effects of lime application on the development of root system and calcium nutrition of guava plants cultivated in an acid distrofic Red Latosol (Typic Hapludox. Soil samples were collected in four equidistant points, at 75 cm of the trunk

  17. Densidade radicular de progênies de pupunheira em função de adubação NPK Root density of pejibaye progenies as a function of NPK fertilization

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    Marilene L. A. Bovi

    1999-11-01

    Full Text Available O uso eficiente de fertilizantes requer o conhecimento de seus efeitos tanto na biomassa aérea quanto na radicular, permitindo que se identifique uma adubação adequada do ponto de vista de uma melhor partição entre ambas. A massa de raízes secas por volume de solo vem sendo utilizada, principalmente em espécies perenes, como subsídio para estimativas de biomassa radicular. Com esse objetivo, foram estudados os efeitos da adubação NPK na densidade radicular de três progênies de pupunheira (Bactris gasipaes Kunth, cultivadas em um Aluvial álico (corrigido por meio de calagem em Ubatuba, SP (clima "Cfa", durante o ano de 1993. O delineamento foi um fatorial fracionado, composto por quatro doses crescentes de nitrogênio (0 a 400 kg/ha/ano de N, fósforo (0 a 200 kg/ha/ano de P2O5 e potássio (0 a 200 kg/ha/ano de K2O, em experimento integrado (progênies e adubação. As amostras foram coletadas por ocasião da primeira colheita de palmito (outubro de 1993, quando as plantas (cultivadas no espaçamento de 2 x 1 m tinham cerca de dois anos de campo. Utilizou-se o método do trado, coletando-se, por parcela experimental, duas amostras na linha e duas na entrelinha. Houve diferenças entre genótipos (GE, com as progênies 2 e 3 apresentando, em média, maior densidade radicular que a progênie 1 (5,15 e 6,20 contra 2,61 g/dm³, respectivamente. A interação GE x PO (posição da amostra foi significativa, sendo que para as progênies 1 e 2 a maior densidade radicular foi obtida na linha (3,30 e 6,60 g/dm³ na linha, contra 1,92 e 4,70 g/dm³ na entrelinha, respectivamente, enquanto para a 3 a ordem foi inversa (5,57 g/dm³ na linha e 6,84 g/dm³ na entrelinha. Doses crescentes de potássio (K apresentaram efeitos lineares positivos e significativos (R² =0,93 a 0,97 na densidade radicular das três progênies, com acréscimos entre dose mínima e máxima variando de 18 a 28%. Não houve efeito significativo isolado de P, enquanto doses

  18. Sincronização do ciclo celular em meristema radicular de baru (Dipteryx alata Vog. Sinchronization of cell cycle in root meristem of baru (Dipteryx alata Vog.

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    Giovana Augusta Torres

    2003-04-01

    Full Text Available Uma das dificuldades de se conduzir estudos citogenéticos em espécies vegetais nativas do cerrado é a ocorrência de baixos índices metafásicos no meristema radicular. O incremento dos índices mitótico e metafásico em células de pontas de raiz tem sido obtido em várias espécies com a sincronização do ciclo celular por meio de hidroxiuréia (HU. Neste trabalho foram determinadas as condições ótimas para a sincronização eficiente do ciclo em células meristemáticas de raízes de baru (Dipteryx alata Vog.. Foram testadas quatro concentrações de HU (0,00; 1,25; 2,50; 5,00 e 10,00 mM, três tempos de exposição das raízes (10, 15 e 20 h e dois tempos de recuperação do ciclo (5 e 10 h. As melhores respostas foram obtidas com exposição das raízes, de cerca de 1 cm, à solução de HU 3,5 mM, por 20 horas, com posterior recuperação do ciclo em água destilada por 5 horas. O índice de 45% de células em divisão representou um incremento de cerca de 5 vezes em relação à testemunha, ao passo que para células em metáfases, o índice de 22,6% foi cerca de 10 vezes superior. Portanto, o uso dessa estratégia mostrou-se bastante eficiente para a obtenção de grande quantidade de cromossomos para análise citogenética do baru.A major difficulty in cytogenetic studies of plant species from "cerrado" is the low metaphasic index in root tip cells. Cell cycle synchronization, by using hydroxyurea (HU, has been successfully used in order to obtain high mitotic and metaphasic index in several species. The goal of this work was to optimize conditions for efficient synchronization of Dipteryx alata root tip meristematic cells. Different levels of hydroxyurea (0, 1.25, 2.50, 5.00, and 10.00 mM, periods of treatment (10, 15, and 20 h and periods of cell cycle recovery (5 and 10 h were tested. Best results were achieved by treating 10-mm long roots with 3.5 mM hydroxyurea, for 20 h and incubating for 5 h in distilled water. The

  19. Doses de boro e crescimento radicular e da parte aérea de cultivares de arroz de terras altas Influence of boron addition on growth of roots and shoot of upland rice crops

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    Juliano Corulli Corrêa

    2006-12-01

    Full Text Available O crescimento radicular é favorecido em condições adequadas de disponibilidade de boro no solo e, por isto, a aplicação da dose correta desse micronutriente é de grande importância, para que não ocorra prejuízo no desenvolvimento e na produtividade da cultura de arroz de terras altas, de acordo com a variedade e tipo de solo. O presente trabalho teve como objetivo avaliar a influência das doses de boro no crescimento radicular e da parte aérea, em três cultivares de arroz de terras altas. O experimento foi realizado em casa de vegetação, em vaso com capacidade de 10 L, que continha 8 dm³ de solo Latossolo Vermelho distrófico, sendo o delineamento experimental inteiramente casualizado, em esquema fatorial 3 x 3, com quatro repetições. Os tratamentos consistiram de três cultivares (Caiapó, Primavera e Maravilha e três doses de boro (0, 3 e 6 mg dm-3, usando, como fonte, o bórax. A dose de 6 mg dm-3 foi prejudicial tanto à produção de matéria seca da parte aérea como de raiz para o arroz de terras altas. Além de apresentar maior capacidade de absorção de boro, o cultivar Maravilha apresentou-se mais tolerante à elevação da disponibilidade de B no solo, não ocorrendo alterações de comprimento, diâmetro e superfície radicular.Appropriate boron (B availability in soils favors root growth, and a sufficient supply of this micronutrient is very important for adequate rice development and yield in upland fields, depending on the cultivars and soil type. This study aimed at evaluating the influence of B addition on growth of roots and shoot of three upland rice cultivars. The experiment was carried out in a greenhouse, in 10 L pots containing 8 kg of an Hapludox; the experiment was in a completely random 3 x 3 factorial design, with four replications. The treatments consisted of three rice cultivars (Caiapó, Primavera, and Maravilha and three B rates (0, 3 and 6 mg dm-3, as borax. The B rate of 6 mg dm-3 boron was

  20. Citrus asymmetric somatic hybrids produced via fusion of gamma-irradiated and iodoacetamide-treated protoplasts Híbridos somáticos assimétricos de citros produzidos pela fusão de protoplastos irradiados e tratados com iodoacetamida

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    Claudine Maria de Bona

    2009-05-01

    Full Text Available The objective of this study was to produce citrus somatic asymmetric hybrids by fusing gamma-irradiated protoplasts with iodoacetamide-treated protoplasts. Protoplasts were isolated from embryogenic suspension cells of grapefruit (Citrus paradisi Macfad. cultivars Ruby Red and Flame, sweet oranges (C. sinensis Osbeck 'Itaboraí', 'Natal', Valencia', and 'Succari', from 'Satsuma' (C. unshiu Marcow. and 'Changsha' mandarin (C. reticulata Blanco and 'Murcott' tangor (C. reticulata x C. sinensis. Donor protoplasts were exposed to gamma rays and receptor protoplasts were treated with 3 mmol L-1 iodoacetamide (IOA, and then they were fused for asymmetric hybridization. Asymmetric embryos were germinated, and the resulting shoots were either grafted onto sour orange, rough lemon or 'Swingle' (C. paradisi x Poncirus trifoliata x 'Sunki' mandarin rootstock seedlings, or rooted after dipping their bases in indol-butyric acid (IBA solution. The products were later acclimatized to greenhouse conditions. Ploidy was analyzed by flow cytometry, and hybridity was confirmed by amplified fragment length polymorphism (AFLP analysis of plantlet DNAsamples. The best treatment was the donor-recipient fusion combination of 80 Gy-irradiated 'Ruby Red' protoplasts with 20 min IOA-treated 'Succari' protoplasts. Tetraploid and aneuploid plants were produced. Rooting recalcitrance was solved by dipping shoots' stems in 3,000 mg L-1 IBA solution for 10 min.O objetivo deste trabalho foi produzir híbridos somáticos assimétricos de citros pela fusão de protoplastos irradiados com raios gama e protoplastos tratados com iodoacetamida. Protoplastos foram isolados de suspensões celulares embriogênicas de pomelo (Citrus paradisi Macfad., cultivares Ruby Red e Flame, de laranja doce (C. sinensis Osbeck 'Itaboraí', 'Natal', Valencia' e 'Succari', de tangerinas 'Satsuma' (C. unshiu Marcow. e 'Changsha' (C. reticulata Blanco e de tangor 'Murcott' (C. reticulata x C. sinensis

  1. BACTERIAL DETERIORANTS IN CHICKEN BREAST FILLET PACKAGED IN AIR, VACUUM AND IRRADIATED: BACTERIOLOGICAL GROWTH PARAMETERS AND SHELF-LIFE BACTÉRIAS DETERIORANTES EM FILÉS DE FRANGO EMBALADOS EM AR, VÁCUO E IRRADIADOS: PARÂMETROS BACTERIOLÓGICOS DE DESENVOLVIMENTO E PRAZO COMERCIAL

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    Samira Pirola Santos Mantilla

    2009-10-01

    frango resfriado, avaliando-se os parâmetros de desenvolvimento de bactérias deteriorantes e a variação do pH das amostras. A embalagem a vácuo aumentou o prazo de validade comercial, quando comparada à embalagem em 100% ar, tanto nos filés não irradiados, como nos irradiados a 3 kGy. A irradiação das amostras, nas duas doses utilizadas, aumentou, consideravelmente, a validade comercial desse alimento. As bactérias láticas foram os micro-organismos que mais se desenvolveram nas amostras irradiadas, confirmando, assim, uma maior radiorresistência, quando comparada com os outros micro-organismos estudados, enquanto as enterobactérias demonstraram maior sensibilidade ao tratamento com radiação ionizante. A embalagem a vácuo, combinada com a tecnologia de irradiação, pode ser utilizada para melhorar a segurança de filés de peito de frango resfriados e para estender seu prazo de validade comercial.

    PALAVRAS-CHAVE: Deterioração; carne de frango; embalagem a vácuo; radiação de carne; radiação gama.

  2. Evaluation of three rootstocks root system for acid lime ‘tahiti’ at Piauí state/ Sistema radicular de três porta-enxertos para lima ácida ‘tahiti’ no estado do Piauí

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    Adeodato Ari Cavalcante Salviano

    2007-10-01

    Full Text Available The objective of this work was to evaluate the development of the root system of three rootstocks for ‘Tahiti’acid lime [Citrus latifolia (Yu.Tanaka Tanaka]: Rangpur lime (C. limonia Osbeck; Swingle citrumelo [Poncirus trifoliata (L. Raf. x C. paradisi Macf.]; Flying Dragon trifoliate (P. trifoliata (L. Raf.var. (FD – in the soil and environment conditions of the county of José de Freitas, Piauí, located on 04º 52' latitude S and 42º 42' longitude W and 110 m of altitude, in Aw climate. It was used the trench method. A wooden frame divided into 0.1 x 0.2 m parts was fixed in the soil profile and a digital photograph was taken from each part. These photographs were analyzed by software SIARCS 3.0 for sizing of the root system and the data gotten, submitted to the analysis of variance with Tukey test at the level of 5% of probability. The experimental design was entirely randomized, with three treatments (rootstocks and four replications (trenches. The root systems of the rootstocks had 90% of concentration until the depth of 0,4 m, and it was observed that 60% of the roots were concentrated in the first 0,2 m. The root system of the Rangpur lime demonstrated to be superior, in lenght (cm.200 cm-² to the Flying Dragon trifoliate and Swingle citrumelo root systems.O objetivo deste trabalho foi avaliar o desenvolvimento radicular de três porta-enxertos para lima ácida ‘Tahiti’ [Citrus latifolia (Yu.Tanaka Tanaka]: limão Cravo (C. limonia Osbeck; citrumelo Swingle [Poncirus trifoliata (L. Raf. x C. paradisi Macf.]; trifoliata Flying Dragon (P. trifoliata (L. Raf.var. (FD, no município de José de Freitas, Piauí, localizado a 04º 52’ latitude S e 42º 42’ longitude W, e altitude de 110m, onde predomina clima Aw. Foram abertas trincheiras com quatro repetições, para colocação de quadro-gabarito de madeira, com divisórias de 0,1 m na profundidade por 0,2 m na largura, perfazendo cinco camadas na profundidade e seis posi

  3. Crescimento radicular e aéreo de cultivares de arroz de terras altas em função da calagem Root and shoot growth of upland rice cultivars as affected by lime application

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    Carlos Alexandre Costa Crusciol

    2012-01-01

    Full Text Available O presente trabalho teve como objetivo avaliar o crescimento radicular e da parte aérea, além da eficiência de absorção de nutrientes pelas cultivares de arroz Caiapó e Maravilha, em função da calagem. O experimento foi desenvolvido em casa de vegetação, sendo os tratamentos constituídos pelas cultivares Caiapó e Maravilha combinadas com os índices de saturação por bases (V% de 10, 40 e 70. O delineamento experimental utilizado foi inteiramente casualizado, com quatro repetições. Foram avaliados o número de perfilhos, comprimento radicular, matéria seca de raízes, folhas e colmos, o teor foliar e a eficiência de absorção dos macronutrientes. De forma geral, observou-se que a cultivar moderna superou a tradicional em matéria seca de raízes, comprimento radicular, número de colmos, matéria seca de colmos e da parte aérea, além de acumular mais nutrientes a cultivar tradicional, mesmo nas condições de maior acidez. No entanto, os teores de nutrientes foram maiores na cultivar Caiapó. A cultivar Maravilha possui maior crescimento radicular e da parte aérea, nos diversos níveis de acidez, enquanto a Caiapó tem maior eficiência de absorção dos nutrientes do solo. A V% de 40 é a mais efetiva para ambas as cultivares.This work aimed to evaluate root growth, shoot development and nutrient absorption efficiency by rice cultivars Caiapó and Maravilha as affected by lime application. The experiment was carried out in a greenhouse, with treatments set up by Caiapó and Maravilha cultivars in combination with the base saturation (V% of 10%, 40% and 70%. The experiment was in a randomized complete block design, with four replications. The number of tillers, root length, root dry matter, leaves and stems, leaf content and macronutrients absorption efficiency were evaluated. Comparing cultivars, Maravilha cultivar presented higher root dry weight, root length, number of stems, dry matter of stems and shoot than Caiap

  4. Avaliação da reação periodontal na técnica de colagem extra-alveolar de fraturas radiculares verticais simuladas: estudo histológico

    OpenAIRE

    González Hernández, Pedro Antonio [UNESP

    2005-01-01

    Este estudo teve como objetivo verificar a resposta histológica que ocorre no periodonto de inserção após o reimplante de dentes que foram tratados através da técnica de colagem radicular extra-alveolar. Foram selecionados 16 primeiros pré-molares maxilares e mandibulares de cães (s.r.d), divididos em dois grupos de observação: 21 dias e 90 dias. Sob anestesia geral, os dentes foram extraídos utilizando a técnica primeira de exodontia. Com auxílio de um disco de diamante de dupla face foi rea...

  5. Distribuição radicular de cultivares de aspargo em áreas irrigadas de Petrolina - PE Root distribution of asparagus cultivars in irrigated areas of Petrolina, Brazil

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    Luís Henrique Bassoi

    2001-03-01

    Full Text Available A distribuição radicular de duas cultivares de aspargo (New Jersey 220 e UC 157 F1, irrigadas por aspersão convencional, foi avaliada durante o ano de 1997 em solos de textura arenosa, em plantio experimental e comercial, respectivamente, nos Projetos de Irrigação de Bebedouro e Senador Nilo Coelho, em Petrolina (PE. O objetivo foi obter informações do sistema radicular do aspargo, empregando-se os métodos do monolito e do perfil de solo auxiliado pela análise de imagens digitais, para o manejo de solo e água nesse cultivo. Na área experimental, a maior parte da matéria seca, área e comprimento de raízes no perfil de solo e densidade de comprimento radicular foram encontradas até a profundidade de 0,4 m nas duas cultivares, enquanto que na comercial a maior parte da área e comprimento de raízes no perfil do solo estendeu-se até a profundidade de 0,6 m (cv. New Jersey 220. Nesses dois plantios, as raízes das cultivares atingiram a profundidade de 1 m. Na área experimental, a massa seca, a área e o comprimento no perfil de solo, e a densidade de comprimento radicular nas cultivares concentraram-se até a distância de 0,6 m à linha de plantas. No intervalo de diâmetro (d de raízes 2In 1997 the root distribution of two asparagus cultivars (New Jersey 220 and UC 157 F1 irrigated by sprinkler was evaluated in coarse textured soils in experimental and commercial areas at Petrolina county, in the semi-arid region of northeastern Brazil, to obtain useful information for soil and water management. Both the monolith and the soil profile aided by digital image analysis methods were used to evaluate it. In the experimental area, a greater concentration of root dry weight, root area and length in the soil profile and root length density were found up to 04 m depth for both cultivars, while in commercial area the root area and length of cv. New Jersey 220 were concentrated until 0,6 m depth. Roots reached 1 m depth in both areas. In

  6. Nuclear magnetic resonance therapy in lumbar disc herniation with lumbar radicular syndrome: effects of the intervention on pain intensity, health-related quality of life, disease-related disability, consumption of pain medication, duration of sick leave and MRI analysis.

    Science.gov (United States)

    Salfinger, H; Salomonowitz, G; Friedrich, K M; Hahne, J; Holzapfel, J; Friedrich, M

    2015-06-01

    The objective was to assess the effects of therapeutic nuclear magnetic resonance (tNMR) as a conservative treatment for lumbar radicular syndrome (LRS) in patients with lumbar disc herniation. The prospective, randomised, double-blind, placebo-controlled trial included 94 patients, aged 20-60 years (44.79 ± 8.83), with LRS caused by lumbar disc herniation confirmed by MRI scans and with clinical signs of a radicular lesion without indication for surgical intervention. Treatment group (TG) and control group (CG) received standard non-surgical therapy. Additionally, the TG had seven sessions with the tNMR device with a magnetic flux density of 2.3 mT and a frequency of 85 kHz; the CG received 7 sham treatments. Outcome parameters were the treatment effect on pain intensity (Visual Analogue Scale-VAS), health-related quality of life (36-item Short Form Health Survey-SF-36), disease-related disability (Roland Morris Disability Questionnaire-RMDQ), pain medication intake, duration of sick leave and morphological changes assessed by MRI scan analysis. VAS scores improved significantly in both groups (p Patients in the TG recorded significantly fewer days of sick leave in month 3 after treatment (p = 0.026). MRI scan summary scores improved significantly in both groups (L4/5 p treatment of lumbar disc herniation with LRS. The application of tNMR did not meet MCID criteria. It rendered few statistically significant differences between patient groups. The overall results of this trial make a clinical implementation of tNMR in the treatment of lumbar disc herniation with LRS appear premature. Further research is needed to better understand the mode of action of tNMR on compressed neural tissue and to elucidate the issue of the cost/benefit ratio.

  7. Evolução da anatomia radicular do milho 'Saracura' em ciclos de seleção sucessivos Evolution of the root anatomy of 'Saracura' maize in successive selection cycles

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    Fabricio José Pereira

    2008-12-01

    Full Text Available Este trabalho teve como objetivo verificar as modificações nas características anatômicas radiculares relacionadas à hipoxia, durante 18 ciclos de seleção da variedade de milho (Zea mays BRS 4154 Saracura, adaptada a áreas sujeitas a alagamento. A variedade BR 107 e o híbrido simples BRS 1010, suscetíveis ao alagamento, foram utilizados como controle. As diferentes cultivares foram submetidas a alagamentos intermitentes, a cada dois dias, durante dois meses. As amostras radiculares foram preparadas e analisadas em microscopiaóptica. Em relação ao grupo controle e aos ciclos anteriores de seleção, a BRS 4154 teve aumento na formação de aerênquima, diminuição do córtex, diminuição do diâmetro dos vasos, diminuição da camada subepidérmica, aumento na espessura do floema e epiderme. Os sucessivos ciclos de seleção melhoraram as características do milho 'Saracura' e sua tolerância a ambientes alagados.This work aimed to verify the modifications in the root anatomical characteristics related to hypoxia, along 18 selection cycles of the maize (Zea mays cultivar BRS 4154 Saracura, adapted to areas subject to flooding. Cultivars not tolerant to fooding, BR 107 and the simple hybrid BRS 1010, were used as controls. The different cultivars were subjected to intermittent soil waterlogging every two days for two months. The root samples were prepared and analyzed through light microscopy. Compared to the controls group and to early selection cycles, BRS 4154 had increased development of aerenchyma, decreased cortex thickness, decreased metaxylem diameter, decreased subepidermal layer, and increased epidermis and phloem thickness. The successive selection cycles improved 'Saracura' maize characteristics and its tolerance to flooding environments.

  8. Crescimento radicular e nutrição da soja cultivada no sistema plantio direto em resposta ao calcário e gesso na superfície

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    E. F. Caires

    2001-12-01

    Full Text Available A deficiência de cálcio e a toxidez de alumínio têm sido os fatores de acidez mais limitantes ao crescimento de raízes. Com o objetivo de avaliar o crescimento radicular e a absorção de nutrientes pela soja, cv. EMBRAPA 58, e seus reflexos sobre a produção de grãos, considerando as doses de calcário e gesso na superfície, em sistema plantio direto, foi realizado um experimento em um Latossolo Vermelho distrófico textura média, em Ponta Grossa (PR. O delineamento experimental empregado foi o de blocos ao acaso em parcela subdividida, com três repetições. Foram utilizadas quatro doses de calcário dolomítico, com 84% de PRNT: 0, 2, 4 e 6 t ha-1, e quatro doses de gesso agrícola: 0, 4, 8 e 12 t ha-1. A calagem foi realizada em julho e a aplicação de gesso em novembro de 1993. O crescimento radicular da soja não foi afetado pelas condições de acidez, em solo com 15, 12 e 8 mmol c dm-3 de Ca trocável e 28, 32 e 40% de saturação por Al, respectivamente, nas profundidades de 0-10, 10-20 e 20-40 cm. Houve aumento da absorção, pela cultura da soja, de todos os macronutrientes com a calagem, e de Ca e S com a aplicação de gesso. Somente a calagem aumentou a produção de soja, em decorrência de maior disponibilidade e absorção de Mg e de redução dos teores foliares de Zn e Mn.

  9. Distribuição de massa molecular de ácidos húmicos e promoção do crescimento radicular Molecular weight distribution of humic acids and root growth promotion

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    Natália de Oliveira Aguiar

    2009-12-01

    Full Text Available Os ácidos húmicos (AH estimulam diretamente vários processos fisiológicos que promovem o crescimento vegetal, especialmente do sistema radicular. O conhecimento da natureza química e do papel de AH na expressão de efeitos biofertilizantes e bioestimulantes é fundamental para o desenvolvimento de insumos biológicos à base de ácidos húmicos. O objetivo deste trabalho foi avaliar uma possível relação entre a distribuição de massa molecular aparente de AH isolados de vermicomposto e a magnitude de resposta na promoção do crescimento radicular. Para isso, foram obtidas subfrações (SF dos AH por meio de cromatografia preparativa por exclusão de tamanho em gel de Sephadex G-50 (CGE. O processo preparativo foi validado pelo uso da cromatografia líquida de alta performance por exclusão de tamanho (HPSEC. As cinco frações obtidas foram testadas em diferentes concentrações (0; 0,0001; 0,001; 0,003; 0,005; e 0,01 mol L-1 de C quanto à sua capacidade de estimular o crescimento radicular de plantas de Arabidopsis thaliana (ecótipo col. 4. Para plantas de milho (Zea mays hyb. UENF 506-6 foi utilizada a dose de 0,002 mol L-1 de C. O modelo quadrático descreveu a indução do crescimento radicular de Arabidopsis e a dose de AH, sendo 0,00511 mol L-1 de C o ponto de inflexão médio. Na concentração ótima, foi observada correlação inversa e significativa entre distribuição de massa molecular e indução do número de raízes laterais em Arabidopsis. No entanto, outros atributos, como área e comprimento radicular, não sofreram influência da massa molecular aparente. Em plântulas de milho, foi observado aumento no número de sítios de mitose e raízes laterais tanto no tratamento com AH como com suas subfrações. A atividade da H+-ATPase de membrana plasmática foi significativamente alterada pelo AH, porém não ocorreu o mesmo com todas as subfrações. A atividade de estimulação do crescimento radicular parece estar

  10. Review of the United States Army Wholesomeness of Irradiated Food Program (1955-1966); Apercu du Programme d'Etudes de l'Armee des Etats Unis sur la Comestibilite des Produits Alimentaires Irradies (1955-1966); Obzor programmy Amerikanskoj armii po voprosu sokhraneniya vkusovykh i pitatel'nykh'kachestv obluchennykh pishchevykh produktov (1955-1966); Programa del Ejercito de Los Estados Unidos Relativo a la Comestibilidad de los Alimentos Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Raica, N. Jr. [United States Army Medical Research And Nutrition Laboratory, Fitzsimons General Hospital, Denver, CO (United States); Howie, D. L. [United States Army Medical Research and Development Command, Office of the Surgeon General, Washington, DC (United States)

    1966-11-15

    se exponen algunos datos relativos a la cuestion de la comestibilidad de los alimentos irradiados (seguridad desde el punto de vista de la toxicidad, de la nutricion y en parte, de la microbiologia). Concluidos ya los prolongados estudios sobre el consumo de esos alimentos por animales, se ha demostrado que los alimentos irradiados son tan comestibles y, en general, tan aceptables como los tratados por procedimientos clasicos. Los datos se han obtenido gracias a la colaboracion de mas de 30 laboratorios de instituciones docentes, empresas comerciales y organismos oficiales, y comprenden los resultados de estudios sobre el consumo de 21 productos alimenticios irradiados (carne; prescado, frutas y verduras) por mas de 15 000 ratones, 5000 ratas de la misma progenie, 300 perros y 37-monos. En general, los alimentos utilizados para esos estudios recibieron dosis de 2,79 a 5, 58 Mrad obtenidas por medio de combustible agotado, cobalto-60 o fuentes de.electrones de 10 MeV; antes de darlos a los animales se almacenaron durante ues meses; como minimo, a la- temperatura ambiente. Los alimentos no irradiados utilizados como testigo se mantuvieron congelados hasta el momento de su consumo. Durante dos anos se administraron dietas con el 35% (en peso seco) de alimentos irradiados, a dos especies diferentes. Se estudio el crecimiento, la reproduccion, la lactacion, la hematologia, la longevidad, la histopatologfa y la carcinogenesis. Para examinar mas a fondo este ultimo punto, durante dos anos se administraron a ratones dietas con el 100% de alimentos irradiados. Tambien se estudio la radiactividad inducida, la estabilidad y suficiencia de las sustancias nutritivas, la concentracion de enzimas en los tejidos, la digestibilidad, la riqueza en vitamina K y las alteraciones quimicas. Durante periodos de dos semanas se administraron a seres humanos 54 alimentos irradiados diferentes (9,3 krad - 3,7 Mrad) en dietas cuyos componentes portadores de calorias estaban irradiados en la

  11. Retention of radicular posts varying the application technique of the adhesive system and luting agent Retenção de pinos radiculares variando-se a técnica de aplicação do sistema adesivo e do agente cimentante

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    Tabajara Sabbag Fonseca

    2006-12-01

    Full Text Available This study evaluated in vitro the retention of intracanal cast posts cemented with dual-cure resin varying the application method of the primer/adhesive solution and luting agent in the prosthetic space prepared to receive the posts. Sixty endodontically treated maxillary canines had their crowns discarded, and their roots were embedded in acrylic resin. The prosthetic spaces were prepared with Largo burs mounted on a low-speed handpiece coupled to a parallelometer in order to maintain length and diameter of intraradicular posts constant and to guarantee that the preparations were parallel after casting. Two groups (n = 30 were randomly formed according to the device used to apply the adhesive system: microbrush or standard bristle brush (control. Each group was divided into 3 subgroups (n = 10 according to the technique used to place the luting agent into the root canal: using only a lentulo spiral before setting the post, applying it onto the post surface, or combining both methods. After 72 hours, the tensile force required to dislodge each post was determined by a universal testing machine (Instron 4444 set at a speed of 1 mm/min. The results indicated that the use of the microbrush yielded higher bond strength values (0.1740 ± 0.04 kN than those recorded for the bristle brush tip (0.1369 ± 0.04 kN, p O objetivo deste trabalho foi avaliar in vitro a retenção de pinos intra-radiculares variando-se a técnica de aplicação do agente adesivo e do cimento resinoso dual no espaço protético preparado para a recepção do pino. Sessenta caninos superiores tratados endodonticamente tiveram as coroas descartadas e as raízes incluídas em resina acrílica. Os espaços protéticos foram preparados com broca de Largo acionada por micromotor acoplado a um paralelômetro, a fim de manter constantes o comprimento e diâmetro dos pinos intra-radiculares e o paralelismo dos preparos após a fundição. Os pinos foram divididos aleatoriamente em 2

  12. Crescimento radicular de soja em razão da sucessão de cultivos e da compactação do solo Soybean root growth as affected by previous crop and soil compaction

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    Rosemeire Helena da Silva

    2002-06-01

    Full Text Available O objetivo do experimento foi avaliar o crescimento radicular e produção de matéria seca da parte aérea da soja (Glycine max (L. Merrill cultivada após diversas espécies vegetais, em solo com diferentes níveis de compactação. O trabalho foi realizado em vasos contendo amostras de um Latossolo Vermelho, textura franco arenosa, com camada de 3,5 cm (profundidade de 15 a 18,5 cm compactada até as densidades 1,12, 1,36 e 1,60 Mg m-3, onde cultivaram-se anteriormente aveia-preta, guandu, milheto, mucuna-preta, soja, sorgo granífero e tremoço-azul, e um tratamento sem planta (pousio. Essas espécies se desenvolveram por 37 a 39 dias, foram cortadas ao nível do solo, picadas em partes de aproximadamente 3 cm e deixadas sobre a superfície do vaso por 40 dias. Após esse período, cultivou-se a soja até 28 dias após a emergência, quando, então, as plantas foram colhidas. Foram avaliados produção de matéria seca da parte aérea e de raízes, e comprimento e diâmetro radicular da soja. O cultivo anterior com aveia-preta, guandu e milheto favoreceu o crescimento radicular da soja abaixo de camadas compactadas do solo. Independentemente do nível de compactação, o cultivo anterior com qualquer das espécies estudadas beneficiou a produção de matéria seca da parte aérea da soja.This study aimed at evaluating root growth and shoot dry matter production of soybean (Glycine max (L. Merrill cropped after different vegetal species, in a soil with different compaction levels. The experiment was conducted in pots containing a Dark-Red Latosol (Acrortox, loamy sand, and the pots had a layer 3.5 cm (15 to 18.5 cm thick and 15 cm deep compacted to 1.12, 1.36 and 1.60 Mg m-3. Before soybean, the pots were cropped with black oat, pigeon pea, pearl millet, black mucuna, soybean, grain sorghum and lupin, plus a treatment without plants. These species were grown for 37 to 39 days, when they were cut at soil level, prick in particles of

  13. Aplicação superficial de diferentes fontes de corretivos no crescimento radicular e produtividade da aveia preta Surface application by different lime source in root growth and yield of black oat

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    Juliano Corulli Corrêa

    2008-08-01

    Full Text Available Em solos ácidos, a prática da calagem superficial favorece o crescimento radicular, principalmente na superfície do solo, bem como a produtividade das culturas em condições normais de precipitação pluviométrica. Entretanto, pouco se sabe sobre a adoção desta prática e suas eventuais ações, no solo e nas plantas, em relação a outras fontes de corretivos. O objetivo do trabalho foi avaliar o efeito da aplicação superficial de diferentes corretivos nos atributos químicos do solo, no crescimento radicular, da parte aérea e na produtividade da aveia preta. O trabalho foi desenvolvido em campo sobre Latossolo Vermelho distrófico, durante o ano agrícola de 2004, dois anos após a aplicação superficial dos corretivos, no sistema plantio direto. Os tratamentos constituíram da aplicação superficial de calcário dolomítico, escoria de aciaria - E, lama cal - Lcal, lodo de esgoto centrifugado - LC e sem aplicação de corretivo, em delineamento em blocos casualizados com quatro repetições. A aplicação superficial de calcário, escória de aciaria, lama cal, lodo de esgoto centrifugado permitiu o aumento nos valores de pH, no teor de Ca, na maior disponibilidade de P e na redução dos teores de Al no solo. O crescimento do sistema radicular, o desenvolvimento da parte aérea e a produtividade da aveia preta foram incrementados com a aplicação superficial dos corretivos de acidez no sistema plantio direto.Surface lime application to an acid soil under no-till system and normal rainfall conditions increases yield and crop root growth near the soil surface, but the effects of lime sources like flue dust, sewage sludge and aqueous lime have not been fully investigated . The experiment aimed to evaluate the effects of surface application of different lime sources on soil chemical attributes of a clayey, dystrophic Oxisol and black oat root growth and yield under a no-till system. Evaluations were conducted two years after the

  14. Comparação entre os volumes pulmonares irradiados com técnica bidimensional e tridimensional conformada na radioterapia de pacientes com tumores de pulmão localmente avançados Comparison between irradiated lung volumes with two-dimensional and three-dimensional conformal radiotherapy techniques for locally advanced lung cancer

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    Heloisa de Andrade Carvalho

    2009-10-01

    Full Text Available OBJETIVO: Comparar e quantificar os volumes pulmonares irradiados utilizando planejamentos bidimensional (2D e tridimensional (3D conformado na radioterapia de tumores de pulmão. MATERIAIS E MÉTODOS: Em 27 pacientes portadores de câncer de pulmão foi feito planejamento 3D e outro correspondente em 2D. As doses prescritas variaram de 45 a 66 Gy. Foram avaliadas as doses no volume alvo planejado (PTV, volume tumoral macroscópico (GTV e pulmões (volume de pulmão que recebe 20 Gy ou 30 Gy - V20 e V30, respectivamente, e dose média. Os órgãos de risco adjacentes (medula espinhal, esôfago e coração receberam doses abaixo dos limites de tolerância. RESULTADOS: O GTV variou de 10,5 a 1.290,0 cm³ (média de 189,65 cm³. Nos planejamentos 2D foi utilizado, em média, um total de 59,33 campos, e nos planejamentos 3D, 75,65 campos. Em todas as situações analisadas houve significante (p OBJECTIVE: To compare and quantify irradiated lung volumes using two-dimensional (2D and three-dimensional (3D conformal planning for radiotherapy in the treatment of lung cancer. MATERIALS AND METHODS: 2D and 3D conformal radiotherapy plannings were performed for 27 patients with lung cancer. Prescribed doses ranged from 45 to 66 Gy. The analysis covered the doses to planning target volume (PTV, gross tumor volume (GTV and lungs (lung volume receiving 20 Gy or 30 Gy - V20 and V30, respectively, and mean dose. The doses to adjacent organs at risk (spinal cord, esophagus and heart were maintained below the tolerance limits. RESULTS: GTV ranged from 10.5 to 1,290.0 cm³ (mean, 189.65 cm³. On average, a total of 59.33 fields were utilized in the 2D planning and 75.65 fields in the 3D planning. Lung volumes were significantly preserved (P < 0.05 with the 3D conformal planning in all the evaluated cases, with about 15% decrease in the irradiated lung volumes. Lungs without tumor were most benefited from this technique. CONCLUSION: 3D radiotherapy allowed a better

  15. Efecto del follaje de Tagetes minutasobre la nodulación radicular de Meloidogyne incognitaen Capsicum annuum, en invernadero Effect of the foliage of Tagetes minutaon Meloidogyne incognitaroot-galling on Capsicum annuumin a greenhouse

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    Santos Nélida Murga-Gutiérrez

    2013-06-01

    Full Text Available Se investigó el efecto del follaje del “huacatay” Tagetes minutasobre la nodulación radicular producida por el nematodo Meloidogyne incognitaque parasita el “pimiento páprika” Capsicum annuumcultivado en invernadero, con la finalidad de obtener una alternativa de control de este nematodo. Se utilizaron tres grupos experimentales y un testigo, con 12 macetas cada uno, las cuales contenían suelo y arena estériles (1:1. A este substrato se adicionó el follaje de T. minutaal 20, 35 y 50% (v/v según grupo experimental, y el testigo no recibió esta enmienda. En cada maceta se sembró una plántula de C. annuum, y a la semana postsiembra se inoculó 5000 huevos de M. incognita.A las ocho semanas, se evaluaron los nódulos en sus raíces. Todas las plantas presentaron nódulos; aunque, en aquellas de los grupos experimentales el número de éstos fue menor que en las plantas testigo, con diferencia estadística significativa (p 0,05. Se concluye que el follaje de T. minutaadicionado como enmienda orgánica al 20, 35 y 50% al suelo de cultivo de plantas de C. annuum limita la nodulación radicular ocasionada por M. incognita. Lo cual sugiere su uso potencial en el control de este nematodo.The effect of the foliage of Tagetes minuta"huacatay" on Meloidogyne incognitaroot-galling on Capsicum annuum"paprika pepper" cultured in a greenhouse was researched, to obtain a control strategy for this nema-tode. Three experimental groups and one control with 12 pots each were used, which contained sterilized soil and sand (1:1. To this substrate was added cut foliage of T. minutaat 20, 35 and 50% (v/v according to the experimental group, and the control group remained without this amendment. In each pot a seedling of C. annuum was sown, and one week post-seeding was inoculated with 5000 eggs of M. incognita. Eight weeks later the root galling was evaluated. All the plants had root galling; although the number of galls in plants of the experimental

  16. Lime and gypsum to improve root depth of orange crop in an Ultisol of the Coastal Tablelands Calcário e gesso no aprofundamento radicular da laranjeira em um Argissolo dos Tabuleiros Costeiros

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    Lafayette F. Sobral

    2009-12-01

    Full Text Available Coastal Tableland is a landscape unit in the North East of Brazil in which the main soils are Ultisols. In these soils, a compacted layer denominated "cohesive horizon" occurs and root growth is limited by it. An experiment with five treatments and six replications was set up in order to study how liming and gypsum could improve root depth of orange (Citrus sinensis L. Osbeck crop in an Ultisol in which a compacted layer was found at 0.3 m. Treatments were: A - No liming and no gypsum; B - Liming to achieve 60% base saturation; C - B + 1 t of gypsum ha-1 ; D - B + 2 t of gypsum ha-1 and E - B + 3 t of gypsum ha-1. Gypsum increased calcium and sulfate in the cohesive horizon. Surface application of lime and gypsum did not cause changes in soil density and total porosity in the cohesive horizon. An improvement of root length was observed at the cohesive horizon.Os tabuleiros costeiros são uma unidade de paisagem em que um dos principais solos são os Argissolos, nos quais, uma camada compactada, denominada "horizonte coeso" ocorre e o crescimento radicular é por ela limitado. Um experimento com cinco tratamentos e seis repetições foi implantado para se estudar os efeitos da calagem e do gesso no aprofundamento radicular da laranjeira (Citrus sinensis L. Osbeck em um Argissolo onde o horizonte coeso está a 0,3 m de profundidade. Os tratamentos foram: A - Sem gesso e sem calagem; B - Calagem para atingir 60% de saturação por bases; C - B + 1 t ha-1 de gesso ; D - B + 2 t ha-1 de gesso; e E - B + 3 t ha-1 de gesso. A calagem e o gesso aumentaram significativamente os teores de sulfato e de calcio no solo até a profundidade de 0,40 m. A aplicação a lanço de calcário e gesso não causaram modificações na densidade do solo e na porosidade total da camada compactada "horizonte coeso". Foi observado um aumento do comprimento das raízes da laranjeira na camada compactada.

  17. Efecto del volumen radicular sobre el crecimiento de Acacia dealbata Link. en vivero y en terreno en el secano de la Región del Biobío, Chile

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    Iván Quiroz

    2014-02-01

    Full Text Available Entre las especies arbóreas cultivadas en Chile, Acacia dealbata Link. se destaca por su rápido crecimiento y supervivencia en climas con marcado déficit hídrico y suelos altamente degradados. Aun cuando proporciona múltiples productos y servicios, la mayor parte de la investigación se ha centrado caracterizar su capacidad invasora, y poco se conoce respecto a su crecimiento durante los primeros años en terreno, escaseando antecedentes respecto efecto de la modificación de las prácticas silvícolas durante la producción y establecimiento de plantas. Por ello, este estudio analiza el efecto de la modificación del volumen radicular sobre el crecimiento durante la viverización, y la supervivencia y crecimiento culminadas la primera y segunda temporada en terreno. Finalizada la viverización resultó significativo el efecto del volumen radicular sobre el DAC y la altura total (P<0,05, los mayores valores se obtuvieron en plantas producidas con volumen de 100 cm³. Los volúmenes más altos presentaron los mayores índices de esbeltez y de Dickson (P<0.05, mientras que los mejores índices tallo/raíz se observaron con los volúmenes de 56 y 24 cm³ (P<0,05. Culminadas la primera y segunda temporada de crecimiento el efecto del volumen sobre la supervivencia resultó no significativo. Luego de la segunda temporada, se destacó el mayor incremento corriente anual en DAC del tratamiento de 24 cm³ (5,53 ± 1,63 mm. Luego de ambas temporadas se destacó una tendencia a la igualación en altura entre los tratamientos de 100, 80 y 24 cm³, el mayor crecimiento absoluto y relativo se observó en el tratamiento de 24 cm³.

  18. Estudo comparativo da reabsorção radicular apical em pacientes bruxônomos e pacientes sem sinais clínicos de desgaste dentário Comparative study of apical root resorption in patients whith bruxism and without clinical signs of dental wearing

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    Rebeca Odebrech

    2004-05-01

    Full Text Available A reabsorção radicular, assim como o bruxismo, são temas amplamente abordados na literatura, contudo, a associação dos mesmos ainda permanece pouco documentada. Desse modo, esta pesquisa objetiva comparar pacientes portadores de bruxismo e pacientes sem sinais clínicos de desgaste dentário em relação à quantidade de reabsorção radicular apical nos incisivos superiores. Para tanto foram avaliados clínica e radiograficamente 64 pacientes, perfazendo um total de 256 incisivos acompanhados. Os resultados demonstram que há uma correlação positiva entre bruxismo e reabsorção radicular.Root resorption and bruxism are largely study in literature. However their association still remains few documented. The aim of this study is compare the quantity of apical root resorption in upper permanent incisors in patients with bruxism and without clinical signs of dental wearing. 64 patients (256 incisors were evaluated clinical and radiografically. The results shows the correlation between bruxism and root resorption.

  19. Estudo da reabsorção radicular apical após o uso de aparelho extrabucal no tratamento da má oclusão do tipo Classe II, 1ª divisão dentária Study of apical root resorption after occipital headgear wear on the treatment of dental Class II, division 1 malocclusion

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    Vânia Célia Vieira de Siqueira

    2009-04-01

    Full Text Available OBJETIVO: o presente estudo verificou o efeito do uso do aparelho extrabucal (AEB sobre a intensidade da reabsorção radicular apical nos primeiros molares permanentes superiores submetidos à ação do aparelho. MÉTODOS: foram avaliadas as radiografias periapicais da região dos primeiros molares permanentes superiores, bilateralmente, de 19 jovens leucodermas, do gênero feminino, com idades entre 8 e 10 anos, com má oclusão do tipo Classe II, 1ª divisão dentária, pré e pós-tratamento com AEB de tração alta. As 76 radiografias foram divididas em dois grupos, de acordo com o grau de formação radicular. O grupo A consistiu de 18 radiografias com formação radicular incompleta, com exceção da raiz palatina, ao início do tratamento e 18 ao final. O grupo B consistiu de 20 radiografias com formação radicular completa ao início do tratamento e 20 ao final. Mensurou-se os comprimentos radiculares utilizando um paquímetro digital e submeteu-se as medidas obtidas ao teste de erro do método e à análise estatística (teste t de Student para verificar as diferenças no comprimento radicular antes e após o tratamento com o AEB. RESULTADOS: no grupo A ocorreu um aumento significativo dos comprimentos radiculares, enquanto no grupo B as diferenças dos comprimentos radiculares não foram significativas. As medidas pós-tratamento no grupo A não diferiram das medidas pré-tratamento no grupo B, ou seja, os dentes com formação radicular incompleta ao início do tratamento apresentaram crescimento radicular normal durante o tratamento ativo. CONCLUSÃO: concluiu-se que o uso do AEB não influenciou negativamente na formação radicular e não provocou reabsorção apical nos molares submetidos à ação do aparelho, sugerindo que o AEB não apresentou riscos à estrutura e formação radicular quando corretamente indicado e aplicado.AIM: The aim of this study was to verify the effect of occipital headgear wear on the intensity of

  20. Blood cell attachment to root surfaces treated with EDTA gel Adesão de células sangüíneas a superfícies radiculares tratadas com gel de EDTA

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    Fábio Renato Manzolli Leite

    2005-06-01

    Full Text Available Root debridement generates a smear layer which contains microorganisms and toxins that could interfere in periodontal healing. For this reason, different substances have been used to remove it and to expose collagen fibers at the tooth surface. Blood element adhesion to demineralized roots and clot stabilization by collagen fibers are extremely important for the success of periodontal surgery. The aim of this study was to evaluate the different patterns of blood element adsorption and adhesion to root surfaces only irrigated with distilled water and after application of a manipulated or an industrialized EDTA gel. Thirty samples were planed, equally divided into three groups and treated with distilled water (control, a manipulated EDTA gel or an industrialized one. Immediately after, samples were exposed to fresh blood and prepared for scanning electron microscopy. Untreated planed dentin presented the best results with blood cells entrapped in a thick web of fibrin. In the manipulated EDTA group, the web of fibrin was thick with sparse blood elements. The worst result was seen with the industrialized EDTA group, in which no blood elements could be seen. Statistical difference was obtained between control and industrialized EDTA groups. Surfaces only irrigated presented the most organized fibrin network and cell entrapment.A raspagem gera "smear layer", a qual contém microrganismos e toxinas que podem interferir no reparo periodontal. Por esse motivo, diferentes substâncias têm sido empregadas para remover esta camada e expor fibras colágenas da superfície dental. A adesão de elementos sangüíneos a superfícies radiculares desmineralizadas e a estabilização do colágeno pelas fibras colágenas são de extrema importância no sucesso da cirurgia periodontal. O objetivo deste estudo foi avaliar os diferentes padrões de adsorção e adesão de elementos sangüíneos a superfícies radiculares apenas irrigadas com água destilada e ap

  1. Produção e desenvolvimento radicular de plantas de café 'Conilon' propagadas por sementes e por estacas Yield and root development of 'Conilon' coffee plants propagated by cuttings and seeds

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    Fábio Luiz Partelli

    2006-06-01

    Full Text Available O objetivo deste trabalho foi avaliar a produção e o desenvolvimento radicular e da parte aérea de plantas de café 'Conilon', provenientes de sementes e de estacas, no Município de Vila Valério, ES. Foi utilizado o delineamento experimental em blocos ao acaso com dois tratamentos (mudas provenientes de sementes e de estacas e 12 repetições com cinco plantas úteis por parcela. As avaliações da parte aérea foram realizadas a partir de sete meses do plantio. Foram realizadas seis desbrotas e cinco colheitas. A avaliação do sistema radicular foi realizada aos 52 meses depois do plantio em quatro profundidades (0-10, 10-20, 20-40 e 40-60 cm. Foram quantificados o diâmetro, o comprimento e a área superficial de raízes. As plantas propagadas por estaca emitiram maior número de ramos plagiotrópicos, durante os sete primeiros meses de idade, e menor número de brotos ortotrópicos durante todo o experimento. Não houve diferenças no comprimento e na área superficial de raízes finas, entre plantas propagadas por sementes e por estacas. Houve maior concentração de raízes finas nas camadas superficiais do solo. A produtividade das plantas propagadas por estacas é maior do que a das plantas propagadas por sementes.The objective of this work was to evaluate the production and root and shoot development of plants of 'Conilon' coffee, grown from seeds and branches, in Vila Valério, ES, Brazil. The experiment was performed in randomized complete block design, with two treatments (seedlings originated from seeds and branches, and 12 replicates with five plants per plot. Shoot growth evaluation was performed seven months after planting. Six pruning of the orthotropic branches and five yields were evaluated. The evaluation of the root system was done 52 months after planting in four depths (0-10, 10-20, 20-40 and 40-60 cm. Diameter, length and superficial area of roots were quantified. Plants grown from cuttings produced more plagiotropic

  2. A scanning electron microscopic evaluation of different root canal irrigation regimens Avaliação por microscopia eletrônica de varredura de diferentes regimes irrigantes no canal radicular

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    Chaves Medici Mônika

    2006-09-01

    Full Text Available The purpose of this study was to assess the effectiveness of endodontic irrigants in removing the smear layer from instrumented root canal walls using Scanning Electron Microscopy (SEM. The endodontic irrigants used were: 1% sodium hypochlorite (NaOCl; 1% NaOCl mixed to 17% EDTAC; 2% chlorhexidine gel; and Ricinus communis gel. Photomicrographs of the middle and apical thirds were evaluated with the aid of the Fotoscore - v. 2.0 software. The results indicated that the mixture of sodium hypochlorite and EDTAC completely removed the smear layer from dentinal walls. The other endodontic irrigants were not as efficient in cleansing the root canals.A proposta deste estudo foi avaliar, por meio de microscopia eletrônica de varredura (MEV, a efetividade dos irrigantes endodônticos na remoção da "smear layer" das paredes dos canais radiculares instrumentados. Os irrigantes endodônticos utilizados foram: solução de hipoclorito de sódio a 1%; solução de hipoclorito de sódio a 1% misturado ao EDTAC a 17%, gel de clorexidina a 2% e gel de Ricinus communis. Fotomicrografias dos terços médio e apical foram avaliadas com o auxílio do software Fotoscore - versão 2.0. Os resultados indicaram que a mistura da solução de hipoclorito de sódio e EDTAC removeu eficientemente a "smear layer" das paredes dentinárias. Os demais irrigantes endodônticos não foram tão eficientes na limpeza dos canais.

  3. Upregulation of the sodium channel NaVβ4 subunit and its contributions to mechanical hypersensitivity and neuronal hyperexcitability in a rat model of radicular pain induced by local DRG inflammation

    Science.gov (United States)

    Xie, Wenrui; Tan, Zhi-Yong; Barbosa, Cindy; Strong, Judith A.; Cummins, Theodore R.; Zhang, Jun-Ming

    2016-01-01

    High frequency spontaneous firing in myelinated sensory neurons plays a key role in initiating pain behaviors in several different models, including the radicular pain model in which the rat lumbar dorsal root ganglia (DRG) are locally inflamed. The sodium channel isoform NaV1.6 contributes to pain behaviors and spontaneous activity in this model. Among all the isoforms in adult DRG, NaV1.6 is the main carrier of TTX-sensitive resurgent Na currents that allow high-frequency firing. Resurgent currents flow after a depolarization or action potential, as a blocking particle exits the pore. In most neurons the regulatory β4 subunit is potentially the endogenous blocker. We used in vivo siRNA mediated knockdown of NaVβ4 to examine its role in the DRG inflammation model. NaVβ4 but not control siRNA almost completely blocked mechanical hypersensitivity induced by DRG inflammation. Microelectrode recordings in isolated whole DRGs showed that NaVβ4 siRNA blocked the inflammation-induced increase in spontaneous activity of Aβ neurons, and reduced repetitive firing and other measures of excitability. NaVβ4 was preferentially expressed in larger diameter cells; DRG inflammation increased its expression and this was reversed by NaVβ4 siRNA, based on immunohistochemistry and Western blotting. NaVβ4 siRNA also reduced immunohistochemical NaV1.6 expression. Patch clamp recordings of TTX-sensitive Na currents in acutely cultured medium diameter DRG neurons showed that DRG inflammation increased transient and especially resurgent current; effects blocked by NaVβ4 siRNA. NaVβ4 may represent a more specific target for pain conditions that depend on myelinated neurons expressing NaV1.6. PMID:26785322

  4. CRESCIMENTO RADICULAR E NUTRIÇÃO DA CEVADA EM FUNÇÃO DA CALAGEM E APLICAÇÃO DE GESSO BARLEY NUTRITION AND ROOT GROWTH AS AFFECTED BY LIME AND GYPSUM APPLICATIONS

    Directory of Open Access Journals (Sweden)

    EDUARDO FÁVERO CAIRES

    2001-01-01

    Full Text Available A calagem superficial ou incorporada e a aplicação de gesso no solo levam a modificações químicas no perfil que podem influenciar o crescimento de raízes das culturas anuais. O crescimento radicular e a nutrição da cevada, cv. BR 2 (sensível ao Al, foram estudados em função da aplicação de calcário dolomítico (sem calcário e 4,5 t.ha-1 de calcário na superfície ou incorporado e doses de gesso (0, 3, 6 e 9 t.ha-1, em LATOSSOLO VERMELHO Distrófico textura argilosa, em Ponta Grossa (PR. O delineamento experimental adotado foi o de blocos ao acaso em esquema de parcela subdividida, com três repetições. Os tratamentos de calagem (parcelas e as doses de gesso (subparcelas foram aplicados na instalação do sistema plantio direto, em 1998. Avaliaram-se as alterações nos atributos químicos do solo e no crescimento de raízes de cevada no inverno de 1999, após o cultivo de soja. A calagem, na superfície ou incorporada e a aplicação de gesso não influenciaram significativamente o crescimento radicular da cevada, embora o gesso tenha proporcionado melhor distribuição relativa de raízes em profundidade, principalmente quando associado à calagem. Em condições de déficit hídrico severo, não houve limitação no crescimento radicular da cevada, em profundidade, para o teor de Ca trocável de 6 mmol c.dm-3 e a saturação por Al de 35%. A incorporação de calcário melhorou a nutrição de N e K da cevada, mas a produção não foi influenciada pela correção da acidez do solo por meio da calagem na superfície ou com incorporação, certamente devido à prolongada estiagem no período de florescimento da cultura, o que limitou a produção de grãos. A aplicação de gesso melhorou a absorção de N, P, K, Ca e S pela cevada, em condições de deficiência hídrica, proporcionando acréscimos na produção de grãos, em decorrência do aumento de Ca trocável, da relação Ca/Mg e do S-SO4(2- disponível no solo

  5. Biomassa radicular, densidade do solo e análise química do solo de um povoamento de Pinus sp. / Root biomass, soil density and soil chemical analysis in a Pinus sp. plantition

    Directory of Open Access Journals (Sweden)

    Gerson Luiz Selle

    2010-04-01

    Full Text Available O sistema radicular é responsável direto pelo crescimento e sustentação das plantas, em especial das espécies florestais. As raízes finas (menor 2 mm, por sua vez, são as principais responsáveis pela absorção dos nutrientes necessários para o desenvolvimento e crescimento da planta. O gênero Pinus tem crescido em importância nos últimos anos em função de sua adaptabilidade a condições adversas do local, bem como sua grande versatilidade no que diz respeito à comercialização de sua madeira e demais produtos. O presente estudo teve como objetivo quantificar a biomassa de raízes finas e analisar alguns parâmetros edáficos em um povoamento de Pinus sp. plantado em Santa Maria (RS. A biomassa radicular e a densidade do solo foram avaliadas em seis profundidades de solo (0-10, 10-20, 20-30, 30-40, 40-50 e 50-60 cm e três posições: na linha de plantio; na entre linha de plantio; entre quatro plantas, em um povoamento de Pinus sp., com idade de sete anos, localizado em uma área pertencente à Universidade Federal de Santa Maria. A densidade do solo não apresentou diferença significativa ao longo do perfil do solo, não tendo, portanto, influência sobre os resultados de biomassa nas diferentes profundidades. A biomassa radicular encontrada no povoamento foi de 1606,3 kg ha-1 sendo que, 40,6% estavam nos primeiros dez centímetros do solo, diminuindo como o aumento da profundidade. Essa mesma tendência foi registrada para o teor de matéria orgânica, saturação por bases, bem como a quantidade de nutrientes, fatores estes que apresentaram estreita correlação com a quantidade de biomassa. Teor de alumínio e soma de bases aumentaram conforme o aumento da profundidade, mas apresentaram também uma estreita correlação com a biomassa. Os diferentes locais de coleta não diferiram estatisticamente entre si. AbstractThe root system is directly responsible for the growth and support of the plants, especially for the forests

  6. Lead phytotoxicity on germination and early growth of lettuce as a function of root anatomy and cell cycle = Fitotoxicidade do chumbo na germinação e crescimento inicial de alface em função da anatomia radicular e ciclo celular

    Directory of Open Access Journals (Sweden)

    Marcio Paulo Pereira

    2013-04-01

    Full Text Available This work aimed to evaluate the phytotoxicity of five lead concentrations on germination, root anatomy and cell cycle of lettuce. Lettuce cypselae were placed in Petri dishes covered with filter paper and 2.5 mL of solution containing 0.0, 0.5, 1.0, 2.0 and 5.0 mM of Pb(NO32. Dishes were maintained in growth chamber B.O.D. type at 25ºC and photoperiod of 12 h, the following variables were evaluated: germination percentage, early growth, root anatomy, mitotic index and the rate of chromosomal abnormalities on root apical meristem. The seed germination and seedlings early growth were bothreduced proportionally to the increase in lead concentrations. The root anatomy showed decreases in apoplastic barriers andmodifications on the xylem related to the increase of hydraulic conductivity in the presence of lead. There were reductions inthe mitotic index and na increase in chromosomal abnormalities under the different lead concentrations. Therefore, the lettuceroot system were more affected by lead concentrations and the phytotoxicity symptoms are related to the reductions on mitoticindex on root apical meristem and anatomical modifications related to higher lead translocation to plant shoots.Objetivou-se com esse trabalho avaliar a fitotoxicidade de cinco concentrações de chumbo na germinação,anatomia radicular, e divisão celular de alface. Cipselas de alface foram colocadas em placas de Petri com papel de filtro e2,5 mL de solução contendo 0,0; 0,5; 1,0; 2,0 e 5,0 mM de Pb(NO32. As placas permaneceram em câmara do tipo B.O.D. a25°C com fotoperíodo de 12 h, sendo avaliadas as seguintes variáveis: germinação, crescimento inicial, anatomia radicular,índice mitótico e frequência de anormalidades cromossômicas no meristema apical radicular. O delineamento estatístico foiinteiramente casualizado com cinco tratamentos e quatro repetições. Os dados foram submetidos à análise de variância eregressão. A germinação das sementes e o

  7. Predisposição genética, hereditariedade e reabsorções radiculares em Ortodontia: cuidados com interpretações precipitadas: uma análise crítica do trabalho de Al-Qawasmi et al Genetics predisposition, heredity and radicular resorption, in Orthodontics: cares with precipitated interpretations and a critical analysis of Al-Qawasmi´s work

    Directory of Open Access Journals (Sweden)

    Alberto Consolaro

    2004-05-01

    Full Text Available O trabalho de Al-Qawasmi et al.¹, publicado em março de 2003 pelo American Journal of Orthodontics and Dentofacial Orthopedics, procurou estabelecer uma predisposição genética para justificar as reabsorções dentárias em Ortodontia, mas apresentou algumas limitações metodológicas e equívocos na interpretação de seus resultados. A análise criteriosa deste artigo ressalta que, na maioria, estas limitações foram mencionadas e reconhecidas pelos autores na discussão do trabalho, mas o seu resumo e título foram muito taxativos e conclusivos. A linguagem de estudos genéticos nem sempre é familiar a todos os clínicos e isto também requer uma análise esclarecedora à luz de uma visão mais aplicada ao cotidiano ortodôntico. Referenciar ou citar este trabalho de Al-Qawasmi et al.¹, para afirmar de forma taxativa que se demonstrou a natureza hereditária das reabsorções dentárias em Ortodontia, pode denotar falta de conhecimento sobre o assunto ou uma leitura ou compreensão apenas do seu título. Ou ainda, a citação deste trabalho como prova definitiva de associação entre hereditariedade e reabsorções dentárias em Ortodontia pode traduzir também o desejo de excluir da prática clínica a responsabilidade de planejar de forma individualizada e detalhada cada tratamento com base no conhecimento das possibilidades e limitações técnicas oferecidas pela ciência ortodôntica, bem como nas suas bases biológicas, por exemplo, valorizando a morfologia radicular e da crista óssea alveolar e o papel dos cementoblastos na proteção da superfície radicular.The study published in the American Journal of Orthodontics and Dentofacial Orthopedics last March by Al-Qawasmi et al. tried to implicate dental resorption during orthodontic treatment to genetic predisposition. The methodology used, however, presents limitations and interpretative mistakes of the results. When analyzing the article sensibly, one is able to find that

  8. Root distribution of irrigated grapevine rootstocks in a coarse texture soil of the São Francisco Valley, Brazil Distribuição radicular de porta-enxertos de videiras irrigadas em um solo de textura arenosa do Vale do São Francisco

    Directory of Open Access Journals (Sweden)

    LUÍS HENRIQUE BASSOI

    2002-04-01

    Full Text Available An experiment was carried out to determine the root distribution of four grapevine rootstocks (Salt Creek, Dogridge, Courdec 1613, IAC 572 in a coarse texture soil of a commercial growing area in Petrolina County, São Francisco Valley, Brazil. Rootstocks were grafted to a seedless table grape cv. Festival, and irrigated by microsprinkler. Roots were quantified by the trench wall method aided by digital image analysis. Results indicated that roots reached 1 m depth, but few differences among rootstocks were found. All of them presented at least 90 % of the roots distributed until 0.6 m depth, with a greater root presence in the first 0.4 m. The upper 0.6 m can be taken into account as the effective rooting depth for soil and water management.Um experimento foi conduzido para se determinar a distribuição radicular de quatro porta-enxertos (Salt Creek, Dogridge, Courdec 1613, IAC 572 em um solo de textura arenosa, em um plantio comercial em Petrolina - PE, no Vale do São Francisco. Os porta-enxertos foram enxertados com a cv. de uva de mesa sem sementes Festival, e irrigados por microaspersão. As raízes foram quantificadas pelo método da parede da trincheira auxiliado pela análise de imagem digital. Os resultados indicaram que as raízes atingiram 1 m de profundidade, mas poucas diferenças entre os porta-enxertos foram observadas. Cerca de 90% do sistema radicular de todos os porta-enxertos estavam distribuídos até 0,6 m de profundidade, mas houve uma grande presença de raízes até 0,4 m. A camada superficial de solo de 0,6 m pode ser considerada como a profundidade efetiva do sistema radicular para fins de manejo de solo e água.

  9. Prevalência de cárie radicular e condição periodontal em uma população idosa institucionalizada de Piracicaba - SP Prevalence of root caries and periodontal conditions in an elderly institutionalized population from Piracicaba - SP

    Directory of Open Access Journals (Sweden)

    Marcelo de Castro MENEGHIM

    2002-03-01

    Full Text Available A evolução dos procedimentos preventivos e curativos em Odontologia, verificados nas duas últimas décadas, levou a uma maior longevidade dos elementos dentários, acarretando com isso, uma maior demanda por tratamento periodontal e, em especial, cárie radicular no paciente idoso. O presente estudo teve como objetivo verificar as condições periodontais e lesões radiculares, de uma amostra de população institucionalizada do município de Piracicaba - SP. Nesse estudo, foram examinados 151 idosos com idade entre 54 e 93 anos. Os sextantes foram examinados e classificados do ponto de vista de saúde periodontal, necessidade de tratamento periodontal, presença de retração gengival e lesões radiculares, utilizando-se como critérios os indicadores da OMS (1999. Comparando-se duas faixas etárias: de pacientes com idade entre 50 e 75 anos e pacientes com idade acima de 75 anos, constatou-se que há um aumento na prevalência de lesões de cárie e outras afecções radiculares, como erosão e abrasão, indicando aumento na susceptibilidade a tais lesões com o passar da idade.Preventive and invasive dental procedures have improved in the last two decades, leading to a greater longevity of teeth. As a result, teeth are more susceptible to periodontal diseases and, consequently, to root caries. The purpose of this study was to verify the prevalence of both periodontal diseases and root caries in an institutionalized population from Piracicaba - SP, Brazil. In this study, 151 subjects, aging 54 to 93 years, were examined. The sample was divided into two groups: a group of subjects aging 50 to 75 years and a group of subjects over 75 years old. The sextants were examined and classified as to periodontal health, periodontal treatment needs, prevalence of gingival recession and root lesions. In conclusion, a high prevalence of root caries was verified. That indicates an increase in the susceptibility to these lesions, which is associated with

  10. Eatability of the irradiated food; Comestibilidad de los alimentos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Luna C, P C

    1992-05-15

    A food is eatable and innocuous when it has an acceptable nutritional quality, it is toxicological and microbiologically safe for the human consumption. Not one preservation treatment allows to assure this in absolute form. As it happens with other conservation methods, the irradiation produce biological, chemical and physical changes in the treated food. For to check if such changes could cause damages to the health of the consumer, its have been carried out extensive studies to evaluate the inoculate of the irradiated foods. Analyzing diverse toxicity studies to prove the eatability of the irradiated foods, in this work those are presented but important in chronological order. In summary, until today it exists a great heap of tests that they demonstrate without place to doubts that the foods irradiated with a dose up to 10 KGy its are capable for the human consumption, for what can to be concluded that a safety margin exists to consume foods irradiated. (Author)

  11. Management of spent fuel; Gestion del combustible irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Estrampes Blanch, J.

    2015-07-01

    The management of irradiated fuel has become one of the materials that more time and resources deals within their responsibilities that also cover other areas such as the design of the new cycles, supply of fresh fuel, tracking operation cycles and strategies of power changes. (Author)

  12. Ionic conductivity in irradiated KCL; Conductiviad ionica de KCL irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Vignolo Rubio, J

    1979-07-01

    The ionic conductivity of X and gamma irradiated KCL single crystals has been studied between room temperature and 600 degree centigree. the radiation induced damage resulting in a decrease of the conductivity heals by thermal annealing in two steps which are at about 350 and 550 degree centigree respectively. It has been found that the radiation induced colour centres are not involved in the observed decrease of the ionic conductivity. However. It has been observed that the effects of quenching and plastic deformation on the conductivity of the samples are very similar to the effect induced by irradiation. It is suggested that, samples radiation induced dislocation loops might cause the ionic conductivity decrease observed in irradiated samples. (Author)

  13. Retrospective dosimetry in irradiated foods; Dosimetria retrospectiva en alimentos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Calderon, T [Universidad Autonoma de Madrid, Facultad de Ciencias, Dpto. Quimica Agricola, Geologia, Geoquimica, Cantoblanco, Madrid (Spain)

    1999-07-01

    The main objective of this communication is to show the potentiality of certain minerals which accompany the foods (grasses, spices and seasonings) as potential dosemeters and its possible application in the absorbed dose calculations by the same in its hygienic sanitary treatment. (Author)

  14. Atributos químicos do solo, crescimento radicular e produtividade do arroz de acordo com a aplicação de escórias Soil chemical attributes, root growth and rice yield according to slag application

    Directory of Open Access Journals (Sweden)

    Juliana Garcia Carvalho-Pupatto

    2004-12-01

    Full Text Available Resíduos industriais são fontes alternativas de nutrientes para as plantas e sua utilização decorre da necessidade de diminuir o acúmulo dos resíduos nos centros de produção. O objetivo deste trabalho foi avaliar o efeito de escórias de siderurgia nos atributos químicos do solo, no desenvolvimento e na produtividade de grãos do arroz de terras altas irrigado por aspersão. O delineamento experimental foi em blocos casualizados, com três tratamentos constituídos de duas escórias, alto-forno (196 g kg-1 de Si e aciaria (56 g kg-1 de Si, e a testemunha sem aplicação, com oito repetições. As escórias podem ser usadas como corretivo de acidez do solo e como fonte de silício. As alterações nos atributos químicos do solo estão relacionadas com a composição química das escórias. A escória de alto-forno proporcionou maior crescimento radicular em profundidade e melhor distribuição no perfil do solo e, conseqüentemente, maior produção de massa de matéria seca da parte aérea e produtividade de grãos de arroz.Use of industrial residues as alternative sources of nutrients to the plants is due to the necessity of reducing their accumulation in the production sites. The objective of this work was to evaluate the effect of metallurgy slag in soil chemical attributes, in development and in grain yield of upland rice sprinkler irrigated. The experiment was carried out in a randomized block design, with three treatments constituted by two scums, blast furnace (196 g kg-1 of Si and steel slag (56 g kg-1 of Si, and a control without application, with eight replications. The scums can be used as corrective of soil acidity and silicon source. Alterations in the soil chemical attributes are related to the chemical composition of the scums. Blast furnace slag resulted in higher root growth in depth and better distribution in the profile soil provides higher shoot dry matter yield and grain yield.

  15. Influência da estrutura do solo na distribuição e na morfologia do sistema radicular do milho sob três métodos de preparo

    Directory of Open Access Journals (Sweden)

    W. M. P. Mello Ivo

    1999-03-01

    Full Text Available O estudo da distribuição de raízes no solo é um método adequado para se detectarem as condições adversas ou não ao seu desenvolvimento, bem como para avaliar o efeito das alterações introduzidas por sistemas de preparo do solo. Sendo assim, o objetivo deste trabalho foi avaliar o efeito de métodos de preparo sobre determinadas características do solo e, por conseguinte, sobre o desenvolvimento do sistema radicular do milho. Para tal, foi utilizado um experimento de campo, instalado em um solo Podzólico Vermelho-Escuro com cinco anos de utilização por preparo convencional, reduzido e semeadura direta, na sucessão aveia + trevo/milho. Para observar as modificações estruturais do solo, usou-se o método do perfil cultural adaptado, acompanhado por determinações de densidade do solo, porosidade total, macro e microporosidade e resistência ao penetrômetro. Os métodos da parede do perfil e do monolito (prancha com pregos foram utilizados para determinar a distribuição e morfologia das raízes. Nos mapas estruturais descritos, observou-se que os modos de organização provocados pelos tratamentos explicaram parcialmente a presença das raízes no perfil. As plantas submetidas à semeadura direta, quando comparadas às do preparo convencional, tiveram o crescimento inicial das raízes diferindo do padrão diagonal normal e, ao final do ciclo, apresentaram raízes com maior raio médio nas profundidades de 10-15 e 25-35 cm e mostraram a densidade de comprimento (cm cm-3 maior na camada superficial (0-5 cm e menor na camada de 10-15 cm. Os sistemas de preparo não afetaram a massa seca de raízes e o rendimento dos grãos de milho.

  16. Sistema radicular dos citros em Neossolo Quartzarênico dos Tabuleiros Costeiros sob irrigação e sequeiro Citrus root system in Coastal Tablelands on Typic Quartzipsamment under irrigation and rainfed conditions

    Directory of Open Access Journals (Sweden)

    Laercio Duarte Souza

    2007-10-01

    Full Text Available O objetivo deste trabalho foi avaliar o sistema radicular da laranjeira 'Pêra' Citrus sinensis (L. Osb., enxertada em limoeiro 'Rugoso' Citrus jambhiri Lush., plantada no espaçamento 6x4 m, sob sistema irrigado com microaspersores e sob sequeiro. O solo da área experimental, localizada em Itapicuru, BA, é um Neossolo Quartzarênico, com horizonte subsuperficial coeso. O delineamento experimental foi o inteiramente casualizado, e foram avaliadas cinco plantas em cada sistema. Amostras de raiz foram coletadas a cada 0,5 m de distância do caule, em seis profundidades, em quatro locais, na linha de plantas e seis nas entrelinhas. A distribuição das raízes foi avaliada em três classes de diâmetro (1 mm. A comparação entre os locais, em relação à planta, nos sistemas irrigado e sequeiro, tanto na linha de plantas quanto na entrelinha, apresentou diferenças na distribuição de raízes apenas à profundidade de 0-0,20 m. As 36 combinações dos três diâmetros de raiz e das seis profundidades, entre os sistemas irrigado e sequeiro, mostraram diferenças na distribuição de raízes apenas no diâmetro 0,5 e The aim of this work was to evaluate the root system of 'Pera' orange tree Citrus sinensis (L. Osb. grafted on 'Rugoso' lemon tree Citrus jambhiri Lush., cultivated with spacing within and between rows of 4 and 6 m, respectively, under rainfed conditions and under irrigation. The experimental area was established in Itapicuru, BA, Brazil, in a Typic Quartzipsamment soil with a subsuperficial cohesive layer. The experimental was a completely randomized design with five plants evaluated at each system. Root samples were collected in six positions between rows and four positions within rows, spaced of 0.5 m from tree's stem. At each position, the roots were sampled in six depths. Root distribution was evaluated using three ranges of root diameters (1 mm. Comparing the positions from the plants, within and between rows in both systems

  17. Desenvolvimento Vegetativo e morfologia radicular de citrange carrizo afetado por ácido indolbutírico e micorrizas arbusculares Vegetative development and root morphology of carrizo citrange affected by indolebutyric acid and arbuscular mycorrhizal fungi

    Directory of Open Access Journals (Sweden)

    Paulo Vitor Dutra de Souza

    2000-04-01

    Full Text Available Este estudo foi realizado na localidade de Alcanar (Tarragona, Espanha e objetivou avaliar o efeito de cinco concentrações do ácido indolbutírico (AIB (0,0; 0,5; 1,0; 1,5; 2,0 g/L e da inoculação com micorrizas arbusculares (MA (Glomus intraradices Schenck & Smith sobre o desenvolvimento vegetativo, conteúdo foliar de P e K e morfologia radicular de plântulas de citrange Carrizo (Citrus sinensis (L. X Poncirus trifoliata (L. Raf.. Utilizou-se o delineamento experimental de blocos completos casualisados em esquema fatorial, com 4 repetições e 10 plantas por parcela. A aplicação de AIB não alterou o desenvolvimento vegetativo das plântulas cultivadas em ausência de MA, apesar de haver incrementado a quantidade de P e K e a espessura dos feixes vasculares. As MA incrementaram o conteúdo de P foliar. Encontrou-se uma interação positiva entre o AIB e as MA, pois as plântulas micorrizadas apresentaram um incremento no desenvolvimento vegetativo, nos conteúdos foliares de P e K e na espessura dos feixes vasculares com o aumento das concentrações de AIB.This study was carried out in Alcanar (Tarragona - Spain to evaluate the effect of five indolebutyric acid (IBA concentrations (0.0; 0.5; 1.0; 1.5; 2.0 g/L and inoculation with arbuscular mycorrhizae fungi (AMF (Glomus intraradices Schenck & Smith on Carrizo citrange (Citrus sinensis (L. x Poncirus trifoliata (L. Raf. vegetative development, P and K foliar contents and root morphology. The experimental design was in a Completly Randomized Block Design with 10 seedlings per plot and 4 replicates. The IBA concentrations had no effect on vegetative development of nonmycorrhizal seedlings, althougt it had increased P and K foliar contents and primary xylem tickness. AMF increased P foliar content. IBA x AMF interaction was observed, increasing IBA concentrations on mycorrhizal seedlings resulted in increased in vegetative development, P and K foliar contents and primary xylem thickness.

  18. Effect of biomechanical preparation and calcium hydroxide pastes on the antisepsis of root canal systems in dogs Ação do preparo biomecânico e de pastas à base de hidróxido de cálcio na anti-sepsia do sistema de canais radiculares de cães

    Directory of Open Access Journals (Sweden)

    Janir Alves Soares

    2005-03-01

    Full Text Available In the endodontic treatment of root canals with necrotic pulps associated with periapical radiolucent areas, one of the main objectives of treatment consists in eliminating the microorganisms spread throughout the ramifications of the root canal system. The scope of this study was to evaluate the antiseptic efficacy of biomechanical preparation and two calcium hydroxide-based pastes, in dogs' teeth with experimentally induced chronic periapical lesions. After initial microbiological sampling, instrumentation of the root canals was undertaken using the conventional technique, using K type files used in conjunction with a solution of 5.25% sodium hypochlorite. After ninety-six hours, further microbiological sampling was undertaken and Calen/CPMC or Calasept pastes were applied for 15 and 30 days. Ninety six hours after the removal of the medication, the third microbiological sampling was undertaken and finally histomicrobiological analysis followed using Brown & Brenn staining. The results were analyzed using the Kruskall-Wallis test, with a level of significance established at 5% (p0.05, characterized by an elevated incidence of cocci, bacilli and filaments, predominantly gram-positive, in root canals, secondary canals and accessories, apical cementoplasts and dentinal tubules, but with a low incidence of microorganisms in areas of cementum resorption and the periapical lesion. The biomechanical preparation and intracanal dressing based on calcium hydroxide were important in the antisepsis of the root canal; however, both procedures did not produce significant changes in the microbiological aspects of the root canal system.No tratamento endodôntico dos canais radiculares com polpa necrótica associados à áreas radiolúcidas periapicais, um dos principais objetivos consiste em eliminar os microrganismos situados em todo o sistema de ramificações. Por conseguinte, o objetivo deste estudo foi avaliar a eficácia anti-séptica do preparo

  19. Location and angulation of curvatures of mesiobucal canals of mandibular molars debrided by three endodontic techniques Posição e angulação de curvaturas radiculares em canais mesiobucais de molares inferiores preparados por três técnicas endodônticas

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    Isa Geralda Teixeira Constante

    2007-03-01

    Full Text Available The aim of this study was to assess the correlation between the degree of angulation and the position of root curvatures and their influence on the comparative results between the performances of the Progressive, Staged and Serial Preparation Techniques. The mesiobucal canals of 70 extracted mandibular molars were filled with a radiological contrast of 100% Barium sulphate and radiographed with a direct digital radiographic system, in an apparatus that guarantees that the samples remain in the same spatial position at all times. The images were then analyzed in the Coreldraw 10 program (MicroSafe, RJ, Brasil in accordance with two criteria: the methods of Berbert, Nishiyama¹ (1994 and Schneider11 (1971 to determine the position and the angle of the root curvatures, respectively. Initially, the possibility of correlation between these two variables was studied. The teeth were then selected according to angulation (greater than 25 degrees and position of root curvatures (cervical, median and apical in order to perform the endodontic techniques. After preparation, the samples were radiographed again and the images were superimposed in order to compare the pre- and post-operative areas. The difference between them showed the percentage of widening for each technique. The results showed that there was no correlation between the angulations and the root curvature positions, and that the different positions did not interfere in the performance of the techniques. The Progressive Preparation technique produced the highest widening values for all the groups, irrespective of the root curvature position.O objetivo deste trabalho foi verificar a correlação entre o grau de angulação e a posição das curvaturas radiculares, e a sua influência nos resultados comparativos entre os desempenhos das técnicas do Preparo Progressivo, Escalonada e Seriada. Os canais mésio-vestibulares de 70 dentes molares inferiores extraídos foram preenchidos com um

  20. Análise radiográfica computadorizada da reabsorção radicular apical após a utilização de duas mecânicas ortodônticas Computer-assisted radiographic evaluation of apical root resorption following orthodontic treatment with two different fixed appliance techniques

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    Eduardo César Almada Santos

    2007-02-01

    Full Text Available OBJETIVO: a reabsorção radicular apical é uma condição comumente observada durante e após o tratamento ortodôntico e fatores como tipo de aparelhagem ortodôntica utilizada, magnitude das forças aplicadas e duração do tratamento podem estar relacionados ao processo de arredondamento do ápice radicular. Buscou-se avaliar, por meio de imagens radiográficas computadorizadas, a quantidade de reabsorção no ápice radicular, quando da utilização de duas diferentes técnicas de mecânica ortodôntica fixa: Edgewise com acessórios padrão e Edgewise com acessórios totalmente programados. METODOLOGIA: a amostra constituiu-se de 20 pacientes tratados pelo mesmo profissional na Clínica de Ortodontia da Faculdade de Odontologia de Araçatuba - UNESP. Os pacientes foram divididos em dois grupos: grupo 1 (Tratados com Edgewise com acessórios padrão e fios de aço e grupo 2 (Tratados com Edgewise com acessórios totalmente programados e fios de níquel-titânio. A avaliação radiográfica digital foi realizada por um único operador por meio de exposições radiográficas digitais feitas no início do tratamento ortodôntico, após retração de caninos e final de tratamento, utilizando o sistema de escores proposto por Levander e Malmgren (1988. RESULTADOS E CONCLUSÕES: a análise dos escores permitiu concluir que o tratamento ortodôntico empregando a técnica Edgewise com acessórios totalmente programados e fios de níquel-titânio apresentou menores graus de reabsorção radicular apical, em comparação à técnica Edgewise com acessórios padrão e fios de aço. Observou-se que, independentemente da técnica empregada, o tratamento ortodôntico como um todo apresentou um grau moderado de reabsorção radicular apical.AIM: external apical root resorption is frequently observed during and after orthodontic treatment and can be related to factors such as mechanical factors, magnitude of forces and treatment time with fixed appliances

  1. Formação e estabilização de agregados pelo sistema radicular de braquiária em um Nitossolo Vermelho Formation and stabilization of aggregates by the grass root system in an Oxisol

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    Eliane Duarte Brandão

    2012-07-01

    Full Text Available As gramíneas atuam de maneira direta na formação e na estabilização de agregados do solo, devido à maior densidade de raízes e à liberação de exsudatos orgânicos no solo. O objetivo do trabalho foi avaliar os efeitos do sistema radicular da Brachiaria ruziziensis Germain et Evrard na formação e na estabilização de agregados de um Nitossolo Vermelho. O experimento foi conduzido em abrigo telado, utilizando-se solo coletado na camada de 0-20cm de profundidade. O solo foi destorroado manualmente e passado em peneira de 2,00mm de abertura de malha e, posteriormente, separadas por classes de diâmetro de agregados de 2,00-1,00, 1,00-0,50 e 0,50-0,25mm com auxílio de peneiras de malhas específicas. O delineamento utilizado foi o inteiramente casualizado, em esquema fatorial 3x2x2x4, correspondendo a três classes de diâmetro de agregados (2,00-1,00, 1,00-0,50 e 0,50-0,25mm, duas condições de cultivo (com e sem gramínea, dois conteúdos de umidade (100% e 60% de água disponível e quatro épocas de avaliação (90, 180, 270 e 360 dias após o plantio da gramínea, com quatro repetições. As amostras de agregados foram acondicionadas em vasos de polietileno com capacidade para 10kg. O conteúdo de umidade foi equilibrado através de irrigações a cada dois dias. As amostragens foram realizadas a cada três meses, determinando-se o diâmetro médio ponderado de agregados secos ao ar (DMPAs, o diâmetro médio ponderado de agregado estáveis em água (DMPAu e o índice de estabilidade dos agregados (IEA = DMPAu/DMPAs. Verificaram-se maiores valores de DMPAu e de IEA para o tratamento com gramínea, indicando que o sistema radicular da Brachiaria ruziziensis favoreceu maior formação e estabilização dos agregados no solo.Grasses take direct action in the formation and stabilization of soil aggregates due to the density of roots and the release of organic exudates in soil. The objective of this study was to evaluate the effects of

  2. [Discarthrosis with hyperalgic lumbar multileveled radicular syndrome].

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    Sardaru, D; Tiţu, Gabriela; Pendefunda, L

    2012-01-01

    The problems at the level of intervertebral discs are producing dysfunctions and important functional regression at the level of lumbar column, at a stage at which the patient could remain blocked in an anterior or lateral flexion position or producing an antalgic position of scoliosis that could incapacitate the patient to perform activities of daily living. The medical rehabilitation, in such cases, must seek not only the relief of local pain through different methods of obtaining it, but also the functional reeducation of the intervertebral articulations through specific analytical mobilization in order to achieve the biomechanical harmonization of the rachis. We report the case study of a 66 year-old patient who presented to our clinic for medical consult and physical therapy when he was diagnosed with discharthrosis, hyperalgic lumbar multileveled radiculopathy at L4-L5 and L5-S1. The lumbar x-ray showed osteophytes, disc narrowing at the level of L5-S1 and inter-apophysis arthrosis. The clinical examination revealed difficulty walking with pain in the right sacroiliac articulations and right sciatic emergence with plantar paraesthesia. The patient developed pain induced scoliosis on the right side that restricted the lumbar range of motion and prevented the right flexion blocking him into an left flexion, any attempt of straightening inducing pain. The condition was treated using specific analytical lumbar mobilization for the realignment of the vertebrae complex. In this case study, we found that functional reeducation in cases of pain induced deviations of the rachis of the column should be centered on the harmonization of inadequate pressure and position of the complex intervertebral articulations.

  3. Estudo do sistema radicular do arroz

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    Emílio B. Germek

    1950-03-01

    Full Text Available The development of the root system on five varieties of rice grown under upland conditions, has been studied. It has been found, with the rice varieties used and under the conditions tested, that 66 percent of the roots occured within 5 centimeters and 95 percent within 15 centimeters of the surface of the ground. A few roots were found to reach a depth of 1 meter, and occasionally to a depth of 1.35 meter. The Iguape-catete variety of rice showed a tendency to develop a somewhat deeper root system than the other varieties studied. Recognition of the fact that development of the roots of the rice plant is largely within the plowed layer of soil, suggests that deep plowing prior to planting with frequent and shallow cultivation following planting, to eliminate weed competition, would be desirable.

  4. Issuing of Regulations on the Clearance of Irradiated Food Products on the Basis of Foreign Petitions; Promulgation d'un Reglement Regissant l'Autorisation de Commercialiser des Denrees Alimentaires Irradiees, sur la Base de Demandes Fondees sur des Donnees Elaborees a l'Etranger; Protsedura polucheniya razreshenij na prodazhu obluchennykh pishchevykh produktov na baze inostrannykh khodatajstv; Autorizacion del Consumo de Productos Alimenticios Irradiados, Sobre la Base de Investigaciones Realizadas en el Extranjero

    Energy Technology Data Exchange (ETDEWEB)

    Foa, E.; Eisenberg, E.; Kahan, R. S.; Lapidot, M. [Soreq Nuclear Research Centre, Yavne (Israel)

    1966-11-15

    , la promulgation de dispositions nouvelles. La plupart des dispositions legislatives applicables a l'heure actuelle prevoient que la comestibilite des aliments irradies doit etre demontree de facon incontestable avant que les autorites puissent permettre l'irradiation et la consommation de ces denrees. Toutefois, une telle demonstration depasse les moyens des petits pays et des pays en voie de developpement, alors que ce sont eux, precisement, qui pourraient tirer les plus grands avantages de l'application des methodes d'irradiation a l'echelle industrielle, puisqu'elle leur permettrait d'augmenter l'approvisionnement de leur marche interieur en produits locaux et d'accroitre leurs possibilites d'exportation. A titre {sup d}'essai, on a presente le 24 fevrier 1966 au Ministere israelien de la sante une requete demandant d'autoriser la consommation humaine de pommes de terre a chair blanche prealablement irradiees pour arreter leur germination. La demande ne se fondait pas sur des etudes faites en Israeel mais sur des recherches publiees a l'etranger; on precisait que les criteres de comestibilite approuves par les gouvernements d'autres Etats devraient etre admis par les autorites israeliennes comme suffisants. Une autre demande analogue relative aux oignons irradies sera presentee sous peu. Si cette procedure reussit, elle pourrait etre adoptee par d'autres pays, ce qui faciliterait sans doute la conclusion d'accords commerciaux internationaux. Elle devrait contribuer a une generalisation rapide de l'irradiation pour la conservation des aliments dans les regions ou ce procede peut presenter un interet economique. (author) [Spanish] Desde principios de 1965 Israel viene interesandose por los problemas juridicos que plantea la autorizacion del consumo de alimentos irradiados y por la instalacion de una planta de irradiacion de alimentos. Entre las cuestiones estudiadas han sido de particular importancia la supervision y control de la irradiacion y la distribucion de

  5. Morphometrical analysis of cleaning capacity using nickel-titanium rotary instrumentation associated with irrigating solutions in mesio-distal flattened root canals Análise morfológica da capacidade de limpeza promovida pela instrumentação rotatória, associada à soluções irrigantes, com limas de níquel-titânio em canais radiculares com achatamento mesio-distal

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    Melissa Andréia Marchesan

    2003-03-01

    Full Text Available Variations in the internal anatomy of root canals may interfere with the success of root canal because tissue remnants may remain in the isthmus, re-entrances and ramifications of flattened root canals making instrumentation more difficult. Successful root canal treatment depends fundamentally on shaping, cleaning, disinfection and obturation. This study verified the quality of cleaning of ProFile .04 rotary technique associated with different irrigating solutions: 0.5% sodium hypochlorite, calcium hydroxide + Tergentol and 2% chlorhexidine in canals with mesio-distal flattening. Twelve human mandibular central incisors were randomly divided into 3 groups and instrumented up to ProFile 0.4 #35 file after cervical preparation, and processed histologically. After optical microscopic evaluation, statistical analysis showed that the percentage of cleaning of the three irrigating solutions was statistically different. Two-by-two comparisons classified the irrigating solutions in increasing order of cleaning: calcium hydroxide + Tergentol As variações da anatomia interna de cada canal radicular podem interferir no sucesso da terapêutica endodôntica devido ao fato de que em canais radiculares achatados, pode persistir remanescentes teciduais em istmos, reentrâncias e ramificações dificultando a execução das técnicas de instrumentação. O sucesso do tratamento dos canais radiculares depende fundamentalmente do preparo da forma, limpeza, desinfecção e obturação. Poucos trabalhos avaliaram a limpeza dos canais radiculares após a instrumentação rotatória. O presente trabalho verificou a qualidade de limpeza dos canais radiculares, por meio da microscopia óptica, promovida pela técnica de instrumentação rotatória associada ao hipoclorito de sódio 0,5%, HCT20 e clorexidina, em canais achatados no sentido mésio-distal. Doze incisivos centrais inferiores humanos foram divididos aleatoriamente em três grupos para que fossem

  6. Crescimento radicular de plântulas de milho afetado pela resistência do solo à penetração Root growth of corn seedlings as affected by soil resistance to penetration

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    Ciro Antonio Rosolem

    1999-05-01

    Full Text Available A resistência do solo à penetração é relacionada com a textura, compactação e umidade do solo. No presente trabalho se estudou o efeito da interação desses fatores sobre o crescimento de raízes de milho. Materiais de solo com 22, 30, 34, 41 e 48% de argila foram acondicionados em tubos de PVC de 10 cm com 4,3 cm de diâmetro interno, nas densidades globais de 1,07, 1,18, 1,36 e 1,53 g cm-3, em três tensões de água: -0,034, -0,106 e -0,640 MPa. Plântulas de milho foram cultivadas nos tubos por 48 horas. Quando a densidade do solo é baixa, a textura tem papel preponderante no crescimento radicular. Esse efeito é menor à medida que aumenta a densidade global. O aumento da resistência do solo à penetração causa diminuição no comprimento e número de raízes seminais adventícias; a raiz seminal primária mostra menor capacidade de penetração do que as raízes seminais adventícias. Resistências do solo à penetração da ordem de 1,3 MPa reduzem à metade o crescimento das raízes seminais adventícias do milho.The soil resistance to penetration is affected by soil texture, compaction and moisture content. In this paper, the effects of the interaction of these factors on corn root growth was studied. Soil materials with 22, 30, 34, 41 and 48% of clay were packed in PVC tubes 10 cm high, with 4.3 cm of internal diameter to reach bulk densities of 1.07, 1.18, 1.36 and 1.53 g cm-3. Water was added to reach water potentials of -0.034, -0.106 and -0.640 MPa. Corn seedlings were grown in the tubes for 48 hours. When the soil bulk density was low, root growth was affected mainly by soil texture. As soil bulk density increased, there was a decrease in the effect of soil texture on root growth. The increase in soil strength caused a decrease in root length and in the number of seminal adventitious roots. The primary roots showed a lower penetration ability when compared to seminal adventitious roots. A soil resitance of 1.3 MPa

  7. Colonização radicular de plantas cultivadas por Ralstonia solanacearum biovares 1, 2 e 3 Root colonization of cultivated plants inoculated with Ralstonia solanacearum biovar 1, 2 and 3

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    José Magno Martins Bringel

    2001-09-01

    Full Text Available A murcha bacteriana causada por Ralstonia solanacearum é considerada a principal doença de origem bacteriana no mundo. Centenas de espécies de plantas pertencentes a mais de 50 famílias botânicas têm sido relatadas como hospedeiras. Foi avaliada, em condições de casa de vegetação, a colonização radicular de alface, arroz, cebolinha, ervilha, pepino e soja, por seis isolados de Ralstonia solanacearum (Rs, biovares 1, 2 e 3. Estirpes dos isolados de Rs com resistência múltipla aos antibióticos estreptomicina, rifampicina e cloranfenicol foram utilizadas. A colonização foi avaliada 45 dias após a inoculação, através do plaqueamento de suspensão de trituração em meio de cultura semi-seletivo. A ervilha comportou-se como hospedeira de todos os isolados mas, apenas um isolado da biovar 3 foi patogênico a esta espécie. A soja apresentou populações elevadas de quatro isolados distribuídos entre as três biovares e o pepino, de apenas dois isolados das biovares 1 e 3. Exceto para o isolado que foi patogênico à ervilha, as plantas não apresentaram sintomas da doença, comportando-se como hospedeiras não suscetível. O arroz apresentou populações muito baixas de todos os isolados. Alface e cebolinha não hospedaram nenhum dos isolados inoculados. Os resultados mostram a capacidade de Rs colonizar e sobreviver em diferentes espécies de plantas como rizobactérias.Bacterial wilt caused by Ralstonia solanacearum is considered the main plant disease of bacterial origin in the world, where hundreds of plant species in more than 50 botanical families are host plants. Root colonization of lettuce (Lactuca sativa, rice (Oryza sativa, spring onion (Allium fistulosum, pea (Pisum sativum, cucumber (Cucumis sativus, and soybean (Glycine max by six isolates of Ralstonia solanacearum (Rs biovars 1, 2 and 3 was evaluated under greenhouse conditions. Bacterial strains resistant to streptomycin, rifampicin and chloranfenicol were used

  8. Biological control of Phytophthora root rot of avocato with microorganisms grown in organic mulches Controle biológico da podridão radicular de Phytophthora no abacateiro utilizando substratos orgânicos colonizados

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    Jefferson L. da S. Costa

    2000-10-01

    Full Text Available Organic mulches colonized with microbial biocontrol agents, termed bioenhanced mulches, were tested for their ability to reduce Phytophthora root rot of avocado (Persea americana Mill.. Benomyl-resistant mutants of Gliocladium virens (KA 230-1 and Trichoderma harzianum (KA 159.2 isolated from suppressive soils and selected as efficient antagonists of P. cinnamomi were evaluated for their ability to colonize different mulches under controlled laboratory conditions. Sudangrass and a coarse yardwaste were found to be better substrates than a fine yardwaste, woodwaste or rice hulls for biocontrol agents propagules production. The most suitable conditions for colonization were an optimum temperature of 24°C, a moisture content of 20% for sudangrass and 30% for the coarse yardwaste, and a continuous light exposure during a 15-day incubation period. In the greenhouse, fresh sudangrass and a coarse yardwaste colonized with G. virens and used as a surface mulch proved to be the best combination for reducing the population of P. cinnamomi in 4-liter pots containing artificially-infested soil. Healthy avocado roots made up 31-37% of the roots in the G. virens-mulch combinations compared to 0% healthy in infested controls after two months.Compostos orgânicos colonizados com agentes de controle microbiológico, então denominados compostos bioativados, foram testados quanto a sua habilidadade controlar à podridão radicular de Phytophtora no abacateiro (Persea americana Mill. Mutantes de Gliocladium virens (KA 230-1 e Trichoderma harzianun (KA 159-2 resistentes a benomyl recuperados de solos supressivos e selecionados como eficientes antagonistas à P. cinnamoni foram avaliados quanto à sua capacidade de colonizar diversos compostos orgânicos em condições de laboratório. O Capim Sudão e um Composto de Jardim de alta granulação demonstraram quanto à sua capacidade de multiplicar propágulos de agentes de biocontrole, serem superiores à um

  9. Avaliação da suscetibilidade antimicrobiana de bactérias anaeróbias facultativas isoladas de canais radiculares de dentes com insucesso endodôntico frente aos antibióticos de uso sistêmico

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    Bárbara Trindade Di Santi

    Full Text Available ResumoIntroduçãoBactérias associadas ao insucesso do tratamento endodôntico são capazes de adquirir e expressar resistência aos agentes antimicrobianos comumente empregados para tratar infecções, o que torna necessário, em determinadas situações, a realização de testes laboratoriais para detectar a resistência ou a suscetibilidade antimicrobiana desses micro-organismos.Objetivoavaliar a suscetibilidade antimicrobiana das cepas de Enterococcus faecalis, Enterococcus faecium, Actinomyces viscosus e Staphylococcus aureus isoladas de canais radiculares de dentes com insucesso endodôntico.Material e métodoCepas clínicas de Enterococcus faecalis (n=3, Enterococcus faecium (n=3, Actinomyces viscosus (n=3 e Staphylococcus aureus (n=3, coletadas in vivo de canais radiculares com insucesso endodôntico, foram testadas quanto à suscetibilidade antimicrobiana por meio do método E-test em duplicata, utilizando os antibióticos: Amoxicilina (AC, Rifampicina (RI, Moxifloxacina (MX, Vancomicina (VA, Tetraciclina (TC, Ciprofloxacina (CI, Cloranfenicol (CL, Benzilpenicilina (PG, Amoxicilina + ácido clavulânico (XL, Doxiciclina (DC, Eritromicina (EM e Azitromicina (AZ.ResultadoTodas as cepas clínicas testadas foram suscetíveis aos antibióticos AC, XL, PG, DC, MX, TC e VA. Todos os isolados das espécies de S. aureus foram suscetíveis aos 12 antibióticos testados. As cepas de E. faecalis, E. faecium e A. viscosus mostraram padrão de suscetibilidade intermediário contra EM. Algumas cepas de E. faecalis e E. faecium foram resistentes a AZ e RI.ConclusãoAs cepas clínicas isoladas dos canais radiculares de dentes com insucesso endodôntico mostraram perfis diferentes de suscetibilidade antimicrobiana e nenhum isolado de E. faecalis e E. faeciumapresentou-se suscetível a AZ e EM.

  10. Avaliação da reabsorção radicular após a movimentação ortodôntica em dentes tratados endodonticamente = Evaluation of root resorption after orthodontic treatment in endodontically treated teeth

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    Kreia, Tatiana Banzatto

    2005-01-01

    Full Text Available O presente estudo teve como objetivo avaliar quantitativamente o grau de reabsorção radicular em dentes com tratamento endodôntico (Grupo 1 e dentes com vitalidade (Grupo 2, antes e após o tratamento ortodôntico. A amostra foi composta de 20 indivíduos, dos gêneros masculino e feminino. O critério de seleção foi a presença de um incisivo superior com tratamento endodôntico prévio ao tratamento ortodôntico e o seu correspondente homólogo, com vitalidade para controle e parâmetro de comparação. As medições foram realizadas em radiografias periapicais e modelos de estudo em gesso obtidos antes e após o tratamento ortodôntico corretivo, por um único operador, com um paquímetro digital e auxílio de uma lupa. Mediu-se na radiografia, o comprimento total (da borda incisal até o ápice radicular e a altura da coroa do dente tratado endodonticamente e do correspondente com vitalidade. Seguiu-se a medição da altura da coroa (da borda incisal até a margem gengival de ambos os dentes nos modelos em gesso e aplicou-se regra de três baseada no método de Huckaba (1964, para se obter o comprimento real dos dentes. Os resultados demonstraram que, apesar do grupo 1 ter apresentado um grau de reabsorção menor que o grupo 2 ao final do tratamento ortodôntico, essa diferença não foi estatisticamente significante (p = 0. 05. Concluiu-se que os dentes com tratamento endodôntico apresentaram menor grau de reabsorção radicular ao final do tratamento ortodôntico

  11. Humic substances isolated from residues of sugar cane industry as root growth promoter Substâncias húmicas isoladas de resíduos da indústria da cana-de-açúcar como promotoras de crescimento radicular

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    Jader Galba Busato

    2010-04-01

    Full Text Available Plant growth promoting substances are widely used in modern agriculture. Several products in the market are humic substances isolated from different sources. The filter cake, a residue of sugar production, is a rich and renewable source of organic matter and these characteristics place the filter cake as a possible source of plant growth promoting substances. Humic acids (HA from filter cake were characterized, and their effects as root growth promoters were evaluated. Chemical features of the HA were evaluated through elemental composition, acidic functional groups, E4/E6 ratio and infrared spectroscopy analyzes. The biological activity of the HA was assessed using root architecture parameters and the P-type H+-ATPase activity. The lateral root development was directly related to the stimulation of plasma membrane ATPase activity. The ability of HA to promote root development indicate that HA from filter cake can be used as environmental plant growth stimulators.Substâncias promotoras do crescimento vegetal são amplamente utilizadas na agricultura moderna. Existem vários produtos no mercado, muitos dos quais são substâncias húmicas isoladas de diferentes fontes. A torta de filtro, um resíduo da produção do açúcar, é uma fonte rica e renovável de matéria orgânica e essas características a tornam uma possível fonte de substâncias promotoras do crescimento vegetal. Ácidos húmicos (AH da torta de filtro foram caracterizados, e foi avaliado seu efeito como promotor de crescimento radicular. As características químicas dos AH foram avaliadas por meio da composição elementar, grupos funcionais ácidos, relação E4/E6 e espectroscopia de infravermelho. A atividade biológica dos AH foi acessada avaliando-se a arquitetura radicular e a atividade da H+-ATPase de membrana plasmática. O desenvolvimento de raízes laterais foi diretamente relacionado ao estímulo da atividade da H+-ATPase. A habilidade dos AH em promover o

  12. Radiographic prevalence of root canal ramifications in a sample of root canal treatments in a Brazilian Dental School Prevalência radiográfica de ramificações do canal radicular em uma amostra de tratamentos endodônticos em uma Faculdade de Odontologia Brasileira

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    Iadasa de Quadros

    2007-06-01

    Full Text Available The aim of this study was to radiographically investigate the presence of root canal ramifications found after endodontic treatment, and to determine any relationship between their presence and the type of the auxiliary chemical substance used. The study evaluated 1,470 endodontic treatments performed by final year undergraduate students at the Dental School of Piracicaba, State University of Campinas (UNICAMP, SP, Brazil, during the period from 1998 to 2000. The X-rays taken during treatment were evaluated in order to establish the presence of ramifications of the root canal system. The initial X-ray did not show the presence of any canal ramifications. After filling, X-rays showed only 3 ramification types: 3.06% of lateral canals, 2.99% of apical deltas, and 0.1% of interradicular canals. The maxillary premolars showed the highest number of lateral canals (n = 13, followed by mandibular premolars (n = 10 and maxillary incisors (n = 10. Apical deltas were mostly found in mandibular molars (n = 14, followed by maxillary incisors (n = 9. Only mandibular molars had interradicular canals. The detection of ramifications increased with the use of EDTA. However, no statistically significant relationship was found between the type of auxiliary chemical substance used and the number of root canal ramifications detected after root canal filling. It was concluded that the frequency of root canal ramifications found radiographically was low in treatments performed by undergraduate students.O objetivo deste estudo foi investigar radiograficamente a presença de ramificações do canal radicular encontrada depois do tratamento endodôntico, e determinar qualquer relação entre a presença destas e do tipo de substância química auxiliar usada. O estudo avaliou 1.470 tratamentos endodônticos executados pelos estudantes do último ano da Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas (UNICAMP, SP, Brasil, no período de 1998 a

  13. Colonização micorrízica e nodulação radicular em mudas de sabiá (Mimosa caesalpiniaefolia Benth. sob diferentes níveis de salinidade Mycorrhizal colonization and root nodulation in sabiá seedlings (Mimosa caesalpiniaefolia Benth. at different salinity levels

    Directory of Open Access Journals (Sweden)

    Rodrigo Castro Tavares

    2012-09-01

    Full Text Available O sabiá (Mimosa caesalpiniaefolia Benth. é uma espécie vegetal nativa do nordeste brasileiro e reúne algumas características fundamentais para compor programas de reabilitação de áreas salinizadas, principalmente quanto associado aos fungos micorrízicos arbusculares (FMAs e a bactérias fixadoras de nitrogênio (BFN. O objetivo do presente estudo foi avaliar a colonização micorrízica e a nodulação radicular de mudas de sabiá adubadas com composto orgânico e irrigadas com águas de diferentes condutividades elétricas. O experimento foi conduzido em casa de vegetação, com delineamento experimental inteiramente casualizado, em esquema fatorial com 2 (presença e ausência de fungos micorrízicos arbusculares x 2 (presença e ausência de composto orgânico x 5 níveis de condutividade elétrica da água de irrigação (0,7; 1,2; 2,2; 3,2 e 4,2 dS m-1, com 3 repetições. Os resultados obtidos indicam que: a salinidade reduziu a colonização micorrízica e a nodulação radicular das mudas de sabiá; a intensificação das condições de estresse salino aumentaram a dependência micorrízica das mudas de sabiá; a colonização das mudas de sabiá com os FMAs proporcionou aumentos na matéria seca dos nódulos radiculares da ordem de 1900%; as micorrizas arbusculares reduziram o pH após o cultivo do solo; e a adição de vermicomposto não promoveu efeito sobre a colonização micorrízica das mudas de sabiá, entretanto, aumentou a produção de matéria seca dos nódulos radiculares.The sabiá (Mimosa caesalpiniaefolia Benth. is a plant species native to the Brazilian northeast and brings together some fundamental features for use in rehabilitation programs of salinized areas, especially if associated with arbuscular mycorrhizal fungi (AMF and nitrogen-fixing bacteria (BFN. The aim of this study was to evaluate the mycorrhizal colonization and root nodulation of sabiá seedlings fertilized with organic compost and irrigated

  14. Avaliação da reabsorção radicular após a movimentação dentária induzida com forças contínua e contínua interrompida: análise histomorfométrica em ratos

    OpenAIRE

    Zamalloa, Yésselin Margot Miranda [UNESP

    2009-01-01

    Introdução: O propósito desta pesquisa foi avaliar a reabsorção radicular após o emprego de forças contínuas e forças contínuas interrompidas. Material e Métodos: Utilizou-se 60 ratos machos da raça Wistar divididos em dois grupos nos quais foram movimentados os primeiros molares superiores direitos com uma mola helicoidal de secção fechada de 3mm – Sentalloy- GAC, liberando 50cN de força. O Grupo I (GI) foi composto por 30 animais com Forças Contínuas (FC), Grupo II (GII), composto por 30 an...

  15. Efeito cariostático de restaurações adesivas em superfícies radiculares: estudo in vitro Caries inhibition around adhesive restorations in roots: in vitro study

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    Anderson Takeo HARA

    2000-06-01

    Full Text Available Materiais restauradores que liberam íons flúor e/ou promovem adesão à estrutura dental têm sido relacionados com a inibição do desenvolvimento de lesões de cárie adjacentes às restaurações. A hipótese testada neste estudo foi a de que o uso de resina composta/sistema adesivo tem efeito cariostático semelhante a um material adesivo que libera íons flúor - cimento de ionômero de vidro - sobre a superfície radicular adjacente às restaurações. Foram utilizadas 20 raízes de terceiros molares humanos extraídos, embutidas em resina de poliestireno e planificadas. Cavidades padronizadas foram preparadas e restauradas aleatoriamente com (a Chelon-Fil (Espe ou (b Z100/SingleBond (3M. Valores iniciais (KHNi de microdureza superficial Knoop da dentina foram obtidos a 100, 200 e 300 mim da margem oclusal das restaurações. Uma área de 2,0 mm ao redor da restauração foi delimitada e submetida à indução de cárie artificial. Obtiveram-se, então, os valores finais (KHNf de microdureza, nas mesmas condições e localizações da leitura inicial. As diferenças entre KHNi e KHNf foram consideradas para a análise estatística. As medianas de KHNi - KHNf nas distâncias de 100, 200 e 300 mim foram para (a: -3,8; -0,3; -1,0; e para (b: 3,3; 2,5; 1,7. O teste de Kruskal-Wallis não evidenciou diferença significativa entre as distâncias dentro de cada grupo. Às distâncias de 200 e 300 mim, não houve diferença significativa entre os materiais avaliados. À distância de 100 mim, (a diferiu significativamente de (b (p Dental materials that release fluoride have been shown to be effective in caries inhibition around restorations. Adhesive materials would also be effective in caries inhibition by sealing and protecting cavity margins from acidic demineralization. This in vitro study tested the hypothesis that composite restorations with a dentin adhesive system have a caries preventive effect similar to that of an adhesive material

  16. Nuclear Materials Management in a Recovery Facility for Unirradiated Enriched Uranium; Gestion des Matieres Nucleaires dans une Installation de Recuperation d'Uranium Enrichi Non Irradie; Administrativno-khozyajstvennyj uchet yadernykh materialov na ustanovke po regeneratsii neobluchennogo obogashchennogo urana; Administracion de Materiales Nucleares en una Planta de Recuperacion para Uranio Enriquecido No Irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Jasny, G. R. [Union Carbide Corporation, Oak Ridge, TN (United States)

    1966-02-15

    poussee du personnel charge des operations. Le transfert des informations au service de comptabilite des matieres nucleaires est assure au moyen d'un systeme de fiches qui accompagnent les matieres: chaque lot est identifie par une fiche individuelle et la livraison du lot est signalee par transfert de la fiche au service de comptabilite des matieres nucleaires{sup .} La plupart des operations comptables sont executees sur des appareils electroniques de traitement de l'information; outre les dossiers et calculs necessaires pour l'etablissement des bilans matieres, on enregistre regulierement des donnees sur la retention et la concentration afin de faciliter la detection des anomalies dans les bilans entree/sortie ou dans les inventaires. L'analyse statistique est largement utilisee pour verifier les mesures et reduire au minimum le nombre d'analyses chimiques. Toutefois, l'application des statistiques n'a pas donne de bons resultats pour l'evaluation des erreurs d'inventaire. Le memoire etudie de maniere detaillee les methodes de controle des matieres indiquees plus haut et certains des problemesiqu'elles posent. (author) [Spanish] Desde hace mas de veinte anos, la planta Y-12 de la Comision de Energia Atomica, situada en Oak Ridge, Tennessee, viene tratando y recuperando diversas formas de uranio enriquecido no irradiado. El proceso de recuperacion consiste en un tren semicontinuo de operaciones unitarias: disolucion, combustion, evaporacion, extraccion, desnitrificacion e hidrofluoracion. El equipo de tratamiento y almacena - miento es de dimensiones restringidas para evitar la criticidad y tiene una capacidad combinada de varios centenares de kg de uranio enriquecido al mes. El material sometido a las operaciones de recuperacion proviene tanto de la planta como de otras instalaciones que la CEA posee en los Estados Unidos. Este material incluye practicamente todos los tipos de residuos de uranio enriquecido sin irradiar. El control fisico se ejerce satisfactoriamente

  17. Physical and Chemical Analysis of the Germinating and Nutritional Properties of Irradiated Wheat; Analyse Physico-Chimique des Caracteristiques Germinatives et Nutritives du Ble Irradie; Fizicheskie i khimicheskie analizy svojstv rosta i pitatel'nykh kachestv obluchennoj pshenitsy; Analisis Fisicoquimico de Trigo Irradiado: Estudio de sus Caracteristicas Germinativas y Nutricionales

    Energy Technology Data Exchange (ETDEWEB)

    Pahissa Campa, J.; Gabarain, R. V.A.; De Pahissa, M. H.H. [Comision Nacional de Energia Atomica (Argentina); Bassa, L. [Junta Nacional de Granos, Buenos Aires (Argentina)

    1966-11-15

    transcurridos diversos lapsos. Se apreciaron distintas variaciones en los valores analiticos determinados, variaciones que dependian de la dosis. En cuanto a la textura, olor, color y sabor del pan, se observaron diferencias sumamente marcadas respecto al testigo, para las dosis mas elevadas. Para evaluar el valor alimenticio del grano irradiado, se emplearon ratas a las cuales se les incluyo en la dieta dicho material. La incorporacion se realizo inmediatamente despues de la irradiacion, y con posterioridad a lapsos variables. Se controlo la evolucion de los animales y fundamentalmente el cuadro hematico y medula osea. (author) [Russian] Pshenicu obluchali razlichnymi dozami s cel'ju opredelit' himicheskoe i fizicheskoe vlijanie obluchenija na celoe zerno (ego povedenie kak semeni) i muku (pishhevaja cennost'). V opyte ispol'zovali raznovidnost' pshenicy Surena M. A. G., kul'tiviruemoj v Argentine, ona byla postavlena Nacional'noj organizaciej po pshenice. Byl primenen pribor kanadskaja gamma-kamera 220 s istochnikom kobal't-60 moshhnost'ju 13 000 kjuri, sposobnym davat' dozu priblizitel'no 1 mrad/chas. Pshenicu obluchali dozami 10, 15, 20, 50,100,150, 200,-300, 500,1000, 1500 i 2000 kilorad. Byli opredeleny sledujushhie analiticheskie velichiny: a) po celomu zernu - ves 1 gektolitra, vlazhnost', procent proteina (soderzhanie azota h 13,5), cifra Zeleny, soderzhanie zoly, sposobnost' k prorastaniju (2 i 3 dnja); b) po muke - vlazhnost', procent proteina (soderzhanie azota h 13,5), cifra Zeleny, soderzhanie zoly, alkogol'naja kislotnost', soderzhanie solodovogo sahara, soderzhanie zhidkoj klejkoviny, soderzhanie suhoj klejkoviny, farintrafi- cheskie velichiny (pogloshhenie vody, vremja razvitija, stepen' poristosti, shhup dlja izmerenija vlazhnosti Brabendera), al'veograficheskie velichiny (soprotivlenie testa raskatyvaniju, rastjagivanie, stepen' i skorost' deformacii, sootnoshenie soprotivlenija na raskatyvanie'i raskatyvanija), velichiny rasshirenija (rabota, trebuemaja dlja

  18. Delayed tooth replantation after root surface treatment with sodium hypochlorite and sodium fluoride: histomorphometric analysis in rats Reimplante dentário tardio após o tratamento da superfície radicular com hipoclorito de sódio e fluoreto de sódio: análise histomorfométrica em ratos

    Directory of Open Access Journals (Sweden)

    André Dotto Sottovia

    2006-04-01

    Full Text Available In cases of delayed tooth replantation, non-vital periodontal ligament remnants have been removed with sodium hypochlorite in an attempt to control root resorption. Nevertheless, reports of its irritating potential in contact with the alveolar connective tissue have been described. Therefore, this study evaluated the healing process on delayed replantation of rat teeth, after periodontal ligament removal by different treatment modalities. Twenty-four rats, assigned to 3 groups (n=8, had their upper right incisor extracted and left on the workbench for desiccation during 60 min. Afterwards, the teeth in group I were immersed in saline for 2 min. In group II, root surfaces were scrubbed with gauze soaked in saline for 2 min; and in group III, scrubbing was done with gauze soaked in 1% sodium hypochlorite solution. Thereafter, root surfaces were etched with 37% phosphoric acid and immersed in 2% acidulate-phosphate sodium fluoride solution, at pH 5.5. Root canals were filled with a calcium hydroxide-based paste and the teeth were replanted. The animals were sacrificed 60 days postoperatively and the pieces containing the replanted teeth were processed and paraffin- embedded. Semi-serial transversally sections were obtained from the middle third of the root and stained with hematoxylin and eosin for histomorphometric analysis. Data were analyzed statistically using Kruskal-Wallis and Dunn's tests. The results showed that root structure and cementum extension were more affected by resorption in group III (pEm reimplante dentário tardio, o ligamento periodontal desvitalizado tem sido removido empregando-se o hipoclorito de sódio, buscando o controle da reabsorção radicular. Relatos de efeito irritante no tecido conjuntivo alveolar após o seu uso, têm sido descritos. Isso justificou a realização deste trabalho buscando minimizar esse inconveniente. Para isso 24 ratos, divididos em 3 grupos de 8 animais, tiveram o incisivo superior direito extra

  19. Evaluación de la capacidad estacional de utilizar eventos de precipitación en tres especies de arbustos nativos de Chile con distintos sistemas radiculares Assessment of the seasonal ability to use precipitation events in three native Chilean shrubs species with different root systems

    Directory of Open Access Journals (Sweden)

    RAUL TORRES

    2002-12-01

    Full Text Available Se evaluó la capacidad estacional de utilizar un evento de precipitación en tres especies arbustivas con diferentes sistemas radiculares (dimórficos: Balbisia peduncularis, Senna cumingii; profundo: Haplopappus parvifolius en la Quebrada El Romeral, norte-centro de Chile. El sitio posee un clima tipo mediterráneo árido con influencia de neblinas costeras y una precipitación promedio anual de 78 mm en los últimos 30 años. La utilización de precipitación artificial (i.e., 25 mm en otoño, invierno y primavera por parte de las plantas se estimó por la composición de isótopos de hidrógeno (delta²H en el agua del xilema y los potenciales hídricos de pre-alba (psipa antes y después del riego. Los resultados indican que las tres especies utilizan una mezcla de dos fuentes de agua (agua superficial proveniente de las precipitaciones, y en mayor proporción, agua subterránea. A excepción de invierno, sólo las especies de sistemas radiculares dimórficos son capaces de reducir su déficit hídrico después de la aplicación de la precipitación artificial. La reducción en las precipitaciones observada en los últimos 100 años afectaría diferencialmente la productividad de las especies con sistema radicular dimórfico, y en especial al arbusto forrajero Balbisia peduncularis.Seasonal ability to use precipitation by three shrub species with different root systems (dimorphic: Balbisia peduncularis and Senna cummingii; deep: Haplopappus parvifolius was evaluated in Quebrada El Romeral, north-central Chile. The site has an arid Mediterranean climate with coastal fog influence and an annual mean precipitation of 78 mm during the last 30 years. The use of artificial rain (i.e., 25 mm in fall, winter and spring by plants was estimated by the hydrogen isotope composition (delta²H in the xylem water and the pre-dawn water potentials (psipa before and after watering. The results show that the three species use a mixture of two water sources

  20. Source-sink manipulations in Coffea arabica L. and its effect on growth of shoots and root system Manipulação da relação fonte-dreno em Coffea arabica L. e seu efeito no crescimento da parte aérea e do sistema radicular

    Directory of Open Access Journals (Sweden)

    José Donizeti Alves

    2011-10-01

    Full Text Available This paper investigated changes in growth and carbohydrate content of shoots and root systems in response to source-sink manipulation in field-grown coffee trees. The source-sink manipulations were carried out using manual de-fruiting. Two plots of trees were established: in one group, the fruit was left on the tree, while in the second group all fruits were removed manually. Similar results were obtained for coffee trees with and without fruit in terms of height, stem and skirt diameter and branch lengths. A biochemical evaluation of the roots showed that no differences were found between the levels of carbohydrates. In the leaves, levels of soluble sugars and reducing sugars were higher in plants with fruit. The starch concentration in leaves and roots did not vary between the plots. Root length density did not vary between plants with and without fruit in the 0 - 0.4 m soil layer. However, plants without fruit had a higher root length density than plants with a full fruit load. These results contrast with results published by others on source-sink relationships of coffee plants. The joint data analysis shows that young trees, with a moderate fruit load, and with good nutritional and health status, produce carbohydrates in sufficient quantities to maintain vegetative and reproductive growth, without harming root system growth.Foram investigadas as alterações no crescimento e nos teores de carboidratos da parte aérea e sistema radicular em resposta à manipulação fonte-dreno em cafeeiros cultivados em condições de campo. Essas manipulações foram realizadas mediante desfrutificação manual. Dois grupos de plantas foram estabelecidos: em um grupo, a produção de frutos foi mantida, enquanto no segundo grupo, todos os frutos foram retirados manualmente. Cafeeiros, com e sem frutos apresentaram resultados semelhantes em termos de altura, diâmetro do caule e saia e comprimentos de ramos. Nas avaliações bioquímicas nas raízes n

  1. Distribuição do sistema radicular de citros em uma toposseqüência de solos de tabuleiro costeiro do Estado da Bahia Citrus root system distribution in a coastal table land soil toposequence of the state of Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Luciano da Silva Souza

    2008-04-01

    Full Text Available O aprofundamento do sistema radicular dos citros é importante para aumentar a produtividade e a longevidade dessa cultura, principalmente em solos que apresentam horizontes coesos subsuperficiais. Assim, o objetivo deste trabalho foi avaliar a distribuição das raízes da laranjeira 'Hamlin' enxertada em limoeiro 'Cravo', com 15 anos de idade, em uma toposseqüência de tabuleiro de Sapeaçu-BA, composta por Latossolo Amarelo argissólico (LAx e Argissolo Amarelo (PAx, ambos coesos, e Argissolo Acinzentado (PAC, não coeso. Em 2001, retiraram-se amostras de raízes em uma planta no LAx e no PAx e em duas no PAC, em quatro horizontes, em quatro pontos na linha e em cinco na entrelinha, distanciados por 0,50 m, usando-se um cilindro de aço de 1,20 m de comprimento e 0,085 m de diâmetro. As raízes foram digitalizadas em escaner e processadas no aplicativo GSRoot. As raízes da laranjeira 'Hamlin' enxertada em limoeiro 'Cravo' apresentaram grande sensibilidade à coesão, sendo a densidade de raízes 3,4 a 4,1 vezes maior no solo PAC, não coeso. A densidade das raízes encontradas nos horizontes superficiais do LAx e do PAx foi próxima daquela do horizonte mais profundo do PAC. A profundidade efetiva do sistema radicular, até onde se encontraram 80 % das raízes, foi maior no PAC não coeso, e a distância efetiva do sistema radicular, até onde se encontraram 80 % das raízes a partir do tronco, foi maior no PAx coeso, que foi o solo que apresentou a menor profundidade efetiva das raízes. Nos três solos, houve predominância de raízes com diâmetros 2 mm.The deepening of citrus root system is important to increase crop productivity and longevity, especially in soils with subsurface cohesive horizons. The objective of this study was to evaluate the root distribution of 'Hamlim' sweet orange grafted onto Rangpur lime. The 15 year-old plants were located in a coastal plain soil toposequence in Sapeaçu county, Bahia, Brazil. The soils were

  2. Aporte de carbono solúvel pelo sistema radicular de arroz e sua influência nos teores de substâncias húmicas de um Latossolo Vermelho-Amarelo Input of dissolved carbon and its influence on humic substances content in an Oxisol

    Directory of Open Access Journals (Sweden)

    Erika Polverari Farias

    2005-12-01

    Full Text Available O objetivo deste trabalho foi quantificar a contribuição da deposição de C-orgânico solúvel pelo sistema radicular de arroz e a evolução de CO2, durante 64 dias de incubação, em amostras de um Latossolo Vermelho-Amarelo com adição de glicose e de raízes de arroz coletadas em diversos estádios de crescimento da planta (aos 40, 60, 80, 100, 120 e 140 dias da semeadura. Foi realizado o fracionamento da matéria orgânica humificada para avaliar o efeito da adição de sistema radicular na composição do húmus do solo. A rizodeposição de C-orgânico via exsudatos e, ou, decomposição de tecidos mortos mostrou-se correlacionada com o estádio de desenvolvimento da cultura. A rizodeposição total foi estimada em valores ao redor de 90 g m-2 de C por ciclo da planta. A adição de C via raízes às amostras de solo promoveu intensa mineralização da matéria orgânica preexistente no solo, principalmente nos primeiros dias de incubação, e aumentou o teor de C na fração ácidos fúlvicos do húmus, no final do experimento.The aim of this study was to quantify the contribution of soluble organic-C deposition by rice root system and the CO2 evolution during 64 days in an Oxisol samples treated with glucose, and rice roots collected at different plant growth stages (40, 60, 80, 100, 120 and 140 days after sowing. Thereafter, organic matter was fractionated to evaluate the effect of the addition of a root system on the soil humus composition. It was possible to observe the intense rhizodeposition of organic C by exudation or by decomposition of dead tissues. Organic C deposition via rhizodeposition was correlated with the plant development stages. Total rhizodeposition was estimated to be around 90 g m-2 C per plant cycle. The addition of organic C into soil samples via roots promoted intense mineralization of the native soil organic matter, particularly in the beginning of the incubation period, and eventually enhanced the fulvic

  3. Effectiveness of EDTA and EDTA-T brushingm on the removal of root surface smear layer Efeito do EDTA e EDTA-T aplicado de forma ativa na remoção de "smear layer" de superfícies radiculares

    Directory of Open Access Journals (Sweden)

    José Eduardo Cezar Sampaio

    2003-12-01

    Full Text Available The purpose of this study was to compare the removal of root surface smear layer following active application of EDTA gel and EDTA-T (texapon gel in different concentrations (5%, 10%, 15%, 20% and 24%, using scanning electron microscopy. A total of 220 dentin blocks obtained from the root surfaces of extracted teeth were divided into 3 groups: Group I - (control application of saline solution (n = 20; Group II - EDTA gel (pH 7.0 was applied in the following concentrations: 5%, 10%, 15%, 20% and 24% (n = 100; Group III - EDTA-T gel (pH 7.0 applied in the same concentrations described above (n = 100. The photomicrographs were evaluated by one calibrated examiner using a smear layer removal index and following statistical analysis (Kruskal-Wallis test. The results demonstrated that the specimens treated with EDTA and EDTA-T gel presented a better smear layer removal than the control group (p 0.05. Within the limits of this study, it can be concluded that all treatment modalities effectively removed the smear layer from the root surface. The addition of texapon into the EDTA gel formulation did not increase its effectiveness.O objetivo do presente estudo foi comparar, através de microscopia eletrônica de varredura, o efeito da aplicação de gel de EDTA e de EDTA-T (texapon em diferentes concentrações (5%, 10%, 15%, 20% e 24% na remoção de "smear layer" de superfícies radiculares previamente raspadas com instrumentos manuais. Duzentos e vinte espécimes de superfícies radiculares submetidas à raspagem foram divididos em 3 grupos. Grupo I - (controle solução salina (n = 20; Grupo II - gel de EDTA (pH 7,0 nas concentrações de 5%, 10%, 15%, 20% e 24% (n = 100; Grupo III - gel de EDTA-T (pH 7,0 nas concentrações acima descritas (n = 100. As fotomicrografias obtidas foram avaliadas por um examinador calibrado através da aplicação de um índice de remoção de "smear layer", e os dados foram analisados através de análise estat

  4. Efficacy of conventional and digital radiographic imaging methods for diagnosis of simulated external root resorption Eficácia dos métodos radiográficos convencional e digital no diagnóstico de reabsorções radiculares simuladas

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    Vânia Portela Ditzel Westphalen

    2004-06-01

    Full Text Available This in vitro study evaluated and compared the efficacy of conventional (Kodak F-speed (Insight, Kodak and a digital (DRS Gnatus System, Gnatus radiographic imaging for diagnosis of simulated external root resorption cavities. Human mandibles containing teeth were covered with bovine muscle slices in order to simulate the soft tissues. Nine teeth out of each group of teeth were investigated. Initially, three periapical radiographs of each tooth were taken using a tube shift technique with mesial and distal angulations in both methods. All teeth were subsequently extracted and had 0.7 and 1.0-mm deep cavities prepared on their buccal, mesial and distal surfaces at the cervical, middle and apical thirds. Steel cylinder burs (DORMER® - HSS with 0.7 and 1.0-mm diameter were used. Each tooth was replaced on its socket and new radiographs were taken. Three examiners, an endodontist (1, a radiologist (2 and a general dentist (3, evaluated the images. Results were compared by z-test and showed a higher number of cavities detected by the digital method compared to the conventional, regardless of the deepness of the cavity. In decreasing order, examiners 2, 3 and 1 exhibited different potentials of detection of cavities with the conventional method. Examiners 1 and 3 exhibited superior potential than examiner 2 for detection of cavities of different sizes with the digital method.O presente estudo visou avaliar e comparar, in vitro, a eficácia dos métodos radiográficos convencional (filmes de grupos de sensibilidade E/F Kodak Insight e digital (Sistema Gnatus DRS, no diagnóstico de cavidades simulando reabsorções radiculares externas, em dentes contidos em mandíbulas humanas secas com músculo bovino simulando o tecido mole. As variáveis consideradas foram: tamanhos das cavidades e examinadores envolvidos. Foram utilizadas nove unidades de cada grupo dentário, incisivos (central e lateral, caninos, pré-molares e molares, sem lesões periapicais

  5. Effect of rotary instrumentation and of the association of calcium hydroxide and chlorhexidine on the antisepsis of the root canal system in dogs Efeito da instrumentação automatizada e da associação hidróxido de cálcio e clorexidina na anti-sepsia de canais radiculares de cães

    Directory of Open Access Journals (Sweden)

    Janir Alves Soares

    2006-04-01

    Full Text Available This study aimed at evaluating the antisepsis of the root canal system (RCS and periapical region (PR provided by rotary instrumentation associated with chlorhexidine + calcium hydroxide as intracanal medicament. Chronic periapical lesions were induced in 26 pre-molar roots in two dogs. After microbiological sampling, automatic instrumentation using the Profile system and irrigation with 5.25% sodium hypochlorite solution, with a final rinse of 14.3% EDTA followed by profuse irrigation with physiological saline were carried out in 18 root canals. After drying the canals, a paste based on calcium hydroxide associated with a 2% chlorhexidine digluconate solution was placed inside them. After 21 days, the medication was removed, leaving the root canals empty and coronally sealed. After 96 hours, a final microbiological sample was obtained, followed by histomicrobiological processing by the Brown & Brenn method. Eight untreated root canals represented the control group (C-G. Based on the Mann-Whitney test at a confidence level of 5% (p Este estudo objetivou avaliar a anti-sepsia do sistema de canais radiculares (SCR e da região periapical (RP proporcionada pela instrumentação automatizada associada a medicação intracanal à base de hidróxido de cálcio + clorexidina. Lesões periapicais crônicas foram induzidas em 26 raízes de pré-molares de dois cães. Após amostragem microbiológica, procedeu-se à instrumentação automatizada de 18 canais radiculares (CR utilizando-se o sistema Profile e a solução de hipoclorito de sódio a 5,25%, com irrigação final com EDTA a 14,3%, seguida de irrigação profusa com soro fisiológico. Após se secarem os canais, foi colocada em seu interior uma pasta à base de hidróxido de cálcio P.A. associada à solução de digluconato de clorexidina a 2%. Transcorridos 21 dias, removeu-se a medicação, deixando-se os CR vazios e selados coronariamente. Após 96 horas, obteve-se a amostra microbiol

  6. Study of the areas and thicknesses of mesiobucal root canals prepared by three endodontic techniques Estudo das áreas e espessuras de canais radiculares mésio-vestibulares preparados por três técnicas endodônticas

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    Isa Geralda Teixeira Constante

    2007-06-01

    , Escalonada e Seriada. Foram selecionados 45 molares inferiores humanos extraídos, com curvaturas radiculares superiores a 25°, que foram divididos em três grupos para cada técnica estudada e subdivididos em três subgrupos de acordo com a posição da curvatura ao longo da raiz: cervical, mediana ou apical. Após cirurgia de acesso e odontometria, os canais foram preenchidos com contraste radiológico de sulfato de Bário a 100% e os dentes então foram radiografados por um sistema de radiografia digital direta, utilizando-se um aparato capaz de manter as amostras na mesma posição espacial nas diferentes tomadas radiográficas. Após a realização das técnicas endodônticas supracitadas, os dentes foram novamente preenchidos com o sulfato de Bário e radiografados nas mesmas condições anteriores. As imagens digitais pré e pós-operatórias foram então analisadas em dois programas computadorizados, o AutoCAD 2004 e o CorelDraw 10, para verificar, respectivamente, as áreas e as alterações horizontais ocorridas nas paredes internas e externas dos canais radiculares. Apesar de não ter havido diferenças significantes entre as técnicas na análise estatística, em uma análise descritiva a técnica do Preparo Progressivo mostrou-se mais regular, uniforme e eficaz.

  7. Intensidade de colonização do córtex radicular e sua relação com a absorção de fósforo pelo capim-pensacola Intensity of root cortex colonization and its relation with phosphorus uptake by pensacola grass

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    Danilo dos Santos Rheinheimer

    1995-01-01

    Full Text Available Em plantas micorrizadas, após a colonização do córtex radicular, as hifas fúngicas extendem-se no solo absorvendo uma maior quantidade de nutrientes, especialmente o fósforo. Este trabalho tem por objetivo avaliar a relação entre porcentagem e intensidade de colonização do córtex radicular com a absorção de fósforo. Usou-se os resultados de três experimentos desenvolvidos no Departamento de Solos da Universidade Federal de Santa Maria, no período de 1989 a 1992. No primeiro, usou-se cinco níveis de calagem representados por valores de pH (4,6; 5,0; 5,5; 6, 1 e 6,6 e duas doses de P2O5 (0 e 20mg/kg; no segundo, os mesmos valores de pH e quatro doses de P2O5 (0, 20, 50 e 70mg/kg e no terceiro, dois valores de pH (4,6 e 6,1 e três doses de P2O5, (50, 150 e 250mg/kg. Em todos os experimentos usaram-se três níveis de micorrização (solo fumigado, solo fumigado + esporos de fungos micorrízicos arbusculares (fMA nativos e solo natural e pensacola como planta hospedeira. Avaliou-se o fósforo absorvido pela parte aérea, a porcentagem e intensidade de colonização. Na avaliação da intensidade levou-se em consideração a presença de hifas internas e arbúsculos, atribuindo-se notas de 1 a 5. O córtex apresentou-se densamente colonizado pelas estruturas fúngicas em condições de solo ácido e com baixa disponibilidade de fósforo, coincidindo com as maiores absorções de fósforo. Em todos os experimentos e tratamentos a intensidade mostrou-se ser um parâmetro confiável na predição de absorção de fósforo pela pensacola.Plants colonized by mycorrhizal fungi are able to uptake more nutrients, especially phosphorus, than those without colonization due to the increase in the uptake área. The objective of this study was to evaluate the rate and the intensity of mycorrhizal colonization in Paspalum notatum roots and their correlation with P uptake. The data were obtained from three different experiment carried out in a

  8. Influência das concavidades radiculares nas perdas clínicas de inserção, detectadas no exame clínico periodontal inicial The influence of root concavities on clinical attachment loss diagnosed at the initial evaluation of periodontal patients

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    Francisco Emilio PUSTIGLIONI

    1999-12-01

    Full Text Available O propósito deste estudo foi estabelecer a influência das concavidades radiculares na perda clínica de inserção (PCI diagnosticada no exame clínico periodontal inicial. Os dados de PCI foram obtidos dos primeiros e segundos pré-molares, caninos, incisivos laterais e centrais superiores e inferiores, de 163 pacientes. Os dados foram coletados das fichas periodontais dos pacientes que procuraram a Clínica do curso de Pós-Graduação em Periodontia da FOUSP. Foi realizada sondagem em todos os dentes para que se obtivesse as seguintes medidas: distância da linha esmalte cemento à margem gengival, profundidade clínica de sondagem (PCS nos sítios distovestibular (DV, centrovestibular (CV, mesiovestibular (MV, distolingual (DL, centrolingual (CL e mesiolingual (ML. Os dados foram incluídos no estudo quando pelo menos um dos sítios apresentasse PCI ³ 4 mm. Após a análise estatística (Friedman ANOVA test CV e CL mostraram valores de PCI estatisticamente menores para todos os dentes superiores e inferiores. Clinicamente CV mostrou os menores valores de perda clínica de inserção entre todos os dentes analisados, seguido de CL. Embora, baseados em nossos resultados, não exista correlação estatística entre PCI e a presença de concavidades radiculares, não podemos subestimar as últimas no exame clínico inicial, diagnóstico, prognóstico, planejamento cirúrgico e na fase de controle e manutenção do tratamento periodontal.The purpose of this study was to establish the influence of root concavities on clinical attachment loss (CAL that was diagnosed at the initial evaluation of periodontal patients. CAL data were analyzed in the following teeth of 163 patients: upper and lower second and first bicuspids, cuspids, lateral and central incisors. Data were retrieved from the initial dental chart of patients seeking treatment at the Periodontics Graduate Clinic, School of Dentistry, University of São Paulo. Probing was accomplished

  9. Effect of trickle irrigation on root development of the wet bulb and 'pera' orange tree yield in the state of São Paulo, Brazil Efeito da irrigação loclizada no desenvolvimento radicular no bulbo úmido e produção da laranjeira-pera no estado de São Paulo, Brasil

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    Regina C. de M Pires

    2011-12-01

    Full Text Available The aim of this study was to evaluate the effect of different microirrigation designs on root system distribution in wet bulb region, orange orchard yield and quality of orange fruits. The experiment was installed as random blocks with five treatments and four replicates in an orchard of 'Pêra' orange trees grafted on 'Cleopatra' mandarin rootstock. The treatments consisted of: one drip line (T1, two drip lines (T2, four drip lines (T3 per planting row, microsprinkler irrigation (T4 and without irrigation (T5. Irrigation treatments favored yield and ºBrix. The treatment with a single drip line (T1 showed the greatest quantity of roots in relation to the treatments T2 and T3.O objetivo do presente trabalho foi avaliar o efeito de diferentes configurações da irrigação localizada na distribuição do sistema radicular na região do bulbo úmido, na produção e na qualidade dos frutos de laranjeira. O experimento foi instalado em blocos ao acaso, com cinco tratamentos e quatro repetições, em pomar de plantas adultas de laranjeira-Pera enxertada em tangerina-Cleópatra. Os tratamentos consistiram em parcelas com uma linha de tubogotejador (T1, duas linhas de tubogotejadores (T2, quatro linhas de tubogotejadores (T3 por linha de plantio, microaspersão (T4 e sem irrigação (T5. Os tratamentos irrigados favoreceram a produção e o teor de ºBrix. Observou-se maior concentração de raízes na região do bulbo úmido no T1 em relação ao T2 e ao T3.

  10. Distribuição do sistema radicular da bananeira 'Prata-Anã' em duas freqüências de fertirrigação com uréia Distribution of the 'Prata Anã' root system in two urea fertirrigation frequencies

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    Ana Lúcia Borges

    2008-03-01

    Full Text Available O conhecimento da distribuição das raízes da bananeira subsidia informações para orientar a melhor localização de água e fertilizantes, resultando em incremento da produtividade do pomar. Em Latossolo Amarelo distrófico argissólico, em sistema de fileiras duplas (4 x 2 x 2 m, avaliou-se a distribuição do sistema radicular da bananeira 'Prata-Anã', antes da colheita do 2º ciclo, em duas freqüências de fertirrigação com uréia (400 kg de N/ha/ano, a cada 3 dias (F1 e a cada 15 dias (F2. As raízes foram coletadas em diferentes profundidades e distâncias, utilizando tubo metálico, sendo separadas do solo e quantificadas pelo programa GS Root. A maior freqüência de aplicação de N e de água (3 dias favoreceu a densidade de raízes, em comparação com a menor freqüência (15 dias. A maior concentração de raízes ocorreu nas camadas superficiais, até 0,30 m, e entre a planta e o microaspersor. Predominaram raízes de diâmetro entre 0,2 e >1,5 mm, tanto nas camadas superficiais (0 a 0,20 m de profundidade quanto entre a planta e o microaspersor.The knowledge of the distribution of roots in bananas generates information that guide the location of water and fertilizers, resulting an increase in crop yield in banana plantations. The 'Prata Anã' banana root distribution system, in loam clay sandy Yellow Latosol, before harvest of the second cycle, was evaluated in two urea fertirrigation frequencies (400 kg of N/ha/year every 3 days (F1 and 15 days (F2. Root samples were collected in different distances and depths with a metallic tube, separated from the soil and quantified using the GSRoot software. Higher urea fertirrigation frequency (3 days favored root density, in relation to the 15 days frequency. The amount of roots in the superficial layers (up to 0.30 m was greater, decreasing with the depth, as well as for the plant in the direction of the micro sprinkler, and less in the opposite direction. Roots of diameter

  11. Effects of the copper vapour laser radiation in the root canal wall dentine: in vitro experiment using scanning electron microscopy and stereoscopy; Efeitos da radiacao laser de vapor de cobre na parede de dentina de canais radiculares: estudo in vitro por meio de microscopia eletronica de varredura e microscopio estereoscopico

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    Silveira, Maria Claudia Garcia da

    2001-07-01

    Ten human uniradicular teeth had their crown removed along the cement-enamel junction and right away a proper chemical-surgical preparation of the radicular canals was done; the roots were longitudinally sectioned in order to allow the irradiation of the surfaces of the root canals wall dentine. The hemi-roots were separated in two groups: group I (control), with four hemi-roots, not irradiated; and group II, with 16 hemi-roots, subdivided in four sub-groups submitted to the following exposition time: 0,02 s; 0,05 s; 0,1 s and 0,5 s. A copper vapour laser was used with a 510,6 nm wavelength, total average power of 11 W in green and yellow emissions; average power of 6,5 W in green emission; pulse repetition rate of 16.000 Hz and pulse duration of 30 ns. The pulse energy (green line) is 0,4 mJ and the peak power 13,5 W. The laser cavity is unstable type (R{sub 1}=3.900 mm and R{sub 2}-250 mm). The focusing have focal length lens f{sub 1}=250 mm and f{sub 2}=150 mm. The beam quality is of the M{sup 2}=5. The results obtained by scanning electron microscopy analysis showed the appearance of a cavity in the region of the laser beam incidence in the edges of this cavity, dentin was melt and resolidified presenting also cracks due to heat diffusion. Based on these results, we concluded that the size of the cavity formed in the dentin is directly proportional to the rate of exposure and, the more laser emission in the same area, more damage in the root canals wall dentin occurs. More studies need to be done with different exposition's time in order to obtain a safety protocol that does not cause injury in dental and support tissue. (author)

  12. Crescimento, morfologia radicular e liberação de compostos orgânicos por plântulas de soja em função da atividade de alumínio na solução do solo de campo natural Growth, root morphology and organic compounds released by soybean seedlings as a function of aluminum activity in a field soil solution

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    Antonio Nolla

    2007-02-01

    Full Text Available A toxicidade do alumínio em solos é considerada uma das maiores limitações para a produção das culturas. No entanto, algumas plantas são capazes de tolerar altas concentrações de alumínio por sua complexação com ácidos orgânicos exsudados pelas raízes. No intuito de estudar os efeitos concomitantes de faixas pH e de alumínio no desenvolvimento radicular de plântulas de soja, desenvolveu-se um trabalho na solução de um Argissolo Vermelho distrófico típico de campo natural. Cultivou-se, em câmara de crescimento, plântulas pré-germinadas de soja durante três dias dentro de tubos de ensaio aerados contendo 40ml da solução do solo (4,2µmol de Al L-1, submetidos a quatro concentrações de alumínio (0,0; 0,3; 0,6 e 1,2µmol L-1 e três níveis de pH (4,0; 5,0 e 6,0. O crescimento radicular e da parte aérea da soja foi menor em condições mais ácidas (pH 4,0. Em condições de acidez intermediária (pH H2O 5,0, o crescimento radicular foi menos afetado pelas espécies rizotóxicas de alumínio, mesmo quando submetidas a elevadas concentrações de alumínio na solução do solo.Aluminum toxicity in soils is considered one of the major limitations to crop production. However, some plants are able to tolerate high aluminum concentrations due to its complexation with root organic acids exudates. The simultaneous effect of pH ranges and aluminum concentration in soil solution on soybean seedlings root development was studied in a Rhodic Paleudult soil solution under natural grasses vegetation. Soybean seedlings were grown in growth chamber for three days in aerated test tubes containing 40ml soil solution (4.2µmol Al L-1, submmited to four aluminum concentrations (0.0, 0.3, 0.6 and 1.2mmol L-1 and three pH levels (4.0, 5.0 and 6.0. Root and aerial growth decreased under more acidic conditions (pH 4.0. Root growth was less affected by rhyzotoxic aluminum species at pH 5.0, even when submitted to high concentration of

  13. In vivo evaluation of the sealing ability of two endodontic sealers in root canals exposed to the oral environment for 45 and 90 days Avaliação, in vivo, da capacidade de selamento de dois cimentos endodônticos em canais radiculares expostos ao meio bucal por 45 e 90 dias

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    Patrícia Maria Poli Kopper

    2006-01-01

    Full Text Available This in vivo study evaluated the sealing ability of a resin-based sealer (AH Plus and a zinc oxide-eugenol sealer (Endofill in dogs' teeth, exposed to the oral environment for 45 and 90 days. Forty eight lower incisors from 8 dogs were endodonticaly treated. A stratified randomization determined the sealer use in each root canal. All canals were filled using the lateral condensation technique. The excess filling material at the cervical portion of the root canal was sectioned, leaving a 10-mm obturation length inside the canal. Teeth were provisionally sealed with glass ionomer cement for 24 h and the canals were exposed to the oral environment for either 45 or 90 days. Therefore, the experimental groups were as follows: A45- AH Plus for 45 days; A90- AH Plus for 90 days; E45- Endofill for 45 days; and E90- Endofill for 90 days (n=12. After the experimental period, the dogs were killed and the lower jaw was removed. The incisors were extracted and the roots were covered with two coats of nail varnish. The teeth were immersed in India ink for 96 h and submitted to diaphanization. Dye leakage (in mm was measured using stereomicroscopy (10x magnification. The results were statistically analyzed using two-way ANOVA and Tukey test for multiple comparisons (á = 0.05. Group E90 (2.03±0.94 showed significantly higher mean leakage value than all other groups (pEste estudo in vivo avaliou a capacidade de selamento de um cimento endodôntico resinoso (AH Plus e um a base de óxido de zinco eugenol (Endofill, em dentes de cães, expostos ao meio bucal, por 45 e 90 dias. Foi realizado o tratamento endodôntico de 48 incisivos inferiores de 8 cães. Uma randomização estratificada determinou o tipo de cimento a ser usado em cada canal que foram tratados pela técnica de condensação lateral. Após a obturação, o excesso de material obturador, na porção cervical do canal radicular foi seccionado, restando o comprimento de 10 mm no interior do canal

  14. Squamous cell carcinoma of the external auditory canal: computed tomography findings in six cases; Carcinoma espinocelular do conduto auditivo externo: estudo por tomografia computadorizada de seis casos

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    Gonzalez, Fabio Mota; Paes Junior, Ademar Jose de Oliveira; Tornin, Olger de Souza [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Servico de Diagnostico por Imagem]. E-mail: fmg961@yahoo.com.br; Souza, Ricardo Pires de [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Programa de Residencia Medica em Radiologia e Diagnostico por Imagem

    2005-05-15

    Objective: to evaluate the role of computed tomography in the assessment of deep extension of squamous cell carcinoma of the external auditory canal. Materials and methods: in the period between May 1995 and December 2003 six patients with squamous cell carcinoma of the external auditory canal were submitted to computed tomography scan at 'Hospital Heliopolis', Sao Paulo, SP, Brazil, including axial and coronal slices with soft tissue and bone algorithms. Results: thickening of the soft tissue of the external auditory canal was seen in all patients, bone erosion and invasion of the middle ear in five (83.3%), invasion of the mastoid and parotid gland in four (66.7%), invasion of the temporomandibular joint in three (50%), and invasion of the middle cranial fossa, carotid canal and cervical lymph node enlargement in two (33.3%) patients. Conclusion: assessment of deep extension of squamous cell carcinoma of the external auditory canal using computed tomography is useful for clinical staging of the disease allowing better therapeutic planning for these patients. (author)

  15. Correção endovascular de persistência do conduto arterioso em paciente adulto Endovascular approach for persistent ductus arteriosus closure in adult patient

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    José Carlos Dorsa Vieira Pontes

    2010-03-01

    Full Text Available O tratamento da Persistência do Canal Arterial (PCA, em adultos, ainda é controverso. A utilização de próteses auto-expansíveis tem-se mostrado como uma alternativa eficaz ao tratamento cirúrgico. Apresentamos um caso de uma paciente de 45 anos submetida ao tratamento endovascular com o uso de stent auto-expansível.The treatment for closure of persistent ductus arteriosus (PDA in adults still controversial. The endovascular approach has been shown as an effective alternative to surgical treatment. We report a case of 45 years old pacient submitted to endovascular approach for PDA closure.

  16. [Developmental radicular groove as a cause of endodontic failure].

    Science.gov (United States)

    Fabra Campos, H; Millet Part, J

    1989-01-01

    A clinical case of apical injury on an upper lateral incisor with endodontical and surgical failures in its treatment is presented. Extraction of the incisor and its study at the stereoscopic microscope showed the existence of a developmental groove running from the cingulum to the end of the root, establishing a communication between the crevice and the apical part of the tooth. Bacterial infection through the groove could provide an explanation for treatment failure.

  17. Asymmetry of the multifidus muscle in lumbar radicular nerve compression

    International Nuclear Information System (INIS)

    Farshad, Mazda; Gerber, Christian; Farshad-Amacker, Nadja A.; Dietrich, Tobias J.; Laufer-Molnar, Viviane; Min, Kan

    2014-01-01

    The multifidus muscle is the only paraspinal lumbar muscle that is innervated by a single nerve root. This study aimes to evaluate if the asymmetry of the multifidus muscle is related to the severity of compression of the nerve root or the duration of radiculopathy. MRI scans of 79 patients with symptomatic single level, unilateral, lumbar radiculopathy were reviewed for this retrospective case series with a nested case-control study. The cross-sectional area (CSA) of the multifidus muscle and the perpendicular distance of the multifidus to the lamina (MLD) were measured bilaterally by two radiologists and set into relation to the severity of nerve compression, duration of radiculopathy and probability of an indication for surgical decompression. In 67 recessal and 12 foraminal symptomatic nerve root compressions, neither the MLD ratio (severe 1.19 ± 0.55 vs less severe nerve compression: 1.12 ± 0.30, p = 0.664) nor the CSA ratio (severe 1 ± 0.16 vs less severe 0.98 ± 0.13, p = 0.577) nor the duration of symptoms significantly correlated with the degree of nerve compression. MR measurements of multifidus were not different in patients with (n = 20) and those without (n = 59) clinical muscle weakness in the extremity caused by nerve root compression. A MLD >1.5 was, however, associated with the probability of an indication for surgical decompression (OR 3, specificity 92 %, PPV 73 %). Asymmetry of the multifidus muscle correlates with neither the severity nor the duration of nerve root compression in the lumbar spine. Severe asymmetry with substantial multifidus atrophy seems associated with the probability of an indication of surgical decompression. (orig.)

  18. Asymmetry of the multifidus muscle in lumbar radicular nerve compression

    Energy Technology Data Exchange (ETDEWEB)

    Farshad, Mazda; Gerber, Christian; Farshad-Amacker, Nadja A.; Dietrich, Tobias J.; Laufer-Molnar, Viviane; Min, Kan [Balgrist University Hospital, University of Zuerich, Zuerich (Switzerland)

    2014-01-15

    The multifidus muscle is the only paraspinal lumbar muscle that is innervated by a single nerve root. This study aimes to evaluate if the asymmetry of the multifidus muscle is related to the severity of compression of the nerve root or the duration of radiculopathy. MRI scans of 79 patients with symptomatic single level, unilateral, lumbar radiculopathy were reviewed for this retrospective case series with a nested case-control study. The cross-sectional area (CSA) of the multifidus muscle and the perpendicular distance of the multifidus to the lamina (MLD) were measured bilaterally by two radiologists and set into relation to the severity of nerve compression, duration of radiculopathy and probability of an indication for surgical decompression. In 67 recessal and 12 foraminal symptomatic nerve root compressions, neither the MLD ratio (severe 1.19 ± 0.55 vs less severe nerve compression: 1.12 ± 0.30, p = 0.664) nor the CSA ratio (severe 1 ± 0.16 vs less severe 0.98 ± 0.13, p = 0.577) nor the duration of symptoms significantly correlated with the degree of nerve compression. MR measurements of multifidus were not different in patients with (n = 20) and those without (n = 59) clinical muscle weakness in the extremity caused by nerve root compression. A MLD >1.5 was, however, associated with the probability of an indication for surgical decompression (OR 3, specificity 92 %, PPV 73 %). Asymmetry of the multifidus muscle correlates with neither the severity nor the duration of nerve root compression in the lumbar spine. Severe asymmetry with substantial multifidus atrophy seems associated with the probability of an indication of surgical decompression. (orig.)

  19. Cervical radicular block using the CT-guided posterolateral approach

    International Nuclear Information System (INIS)

    Marchegiani, Silvio; Secchi, Adrian; Marangoni, Alberto; Surur, Alberto

    2005-01-01

    Objective: This presentation's goal is to define the indications of the procedure, to describe a new way to access to the foramen, and to evaluate the results. Material and method: Between November 2000 and October 2004, we performed 12 blockades of cervical nerves roots in 11 patients (5 female and 6 males, aged from 37 to 62 years old) with cervical pain without resolution under conventional treatment. The cause of the symptoms included: 7 patients with cervical disc protrusion and 4 patients with cervical degenerative processes diagnosed by previous Magnetic Resonance Imaging (MRI) studies. The levels of the procedure were: 1 in C3, on the right side (8.3%); 2 in C5, on the left side (16.6%); 6 in C6 (5 on the right side and 1 on the left), (50%); and 3 in C7 (25%), under CT guidance alone, with a posterior-lateral access. Results: The first clinical control after 1 hour showed a complete pain remission in all the 11 patients (100%). The second control (15 days after) showed 9 patients (81.9%) without pain, one patient (9,1%) with partial pain relief without medication, and one patient (9,1%) with pain relapse. Finally, in the third control (3 months later) based on ten patients (one of them was not yet on the period of the third control), 7 of them (70%), continued without pain, one patient (10%) showed a partial resolution of the pain without medication, one patient (10%) presented a partial resolution with medication, and one patient (10%), continued with pain and was treated surgically. There was no complication of the procedure in our patients. Conclusion: The cervical nerves root blockade with steroids and anesthetic under CT guidance, with posterolateral access is a safe, minimally invasive procedure, with no complications, that provides a quick solution to the cervical pain. Therefore, this procedure must be considered as a preliminary step before other aggressive treatments such as surgical therapy in a medical decision context. (author)

  20. INFLUÊNCIA DA DENSIDADE DE INÓCULO DE Fusarium solani f.sp. phaseoli NA SEVERIDADE DA PODRIDÃO RADICULAR SECA DO FEIJOEIRO EFFECT OF Fusarium solani f.sp. phaseoli INOCULUM DENSITY ON DRY ROOT ROT SEVERITY IN THE COMMON BEAN

    Directory of Open Access Journals (Sweden)

    Gesimária Ribeiro Costa

    2007-09-01

    Full Text Available

    Foram testadas quatro densidades de inóculo de Fusarium solani, em gramas por litro de solo (1,0; 2,0; 4,0 e 8,0 e um tratamento testemunha, em solo tipo Latossolo Vermelho-Escuro, cultivado e não cultivado, com o objetivo de determinar a densidade mínima de inóculo no solo necessária para a ocorrência de podridão radicular seca do feijoeiro. Como variáveis respostas foram avaliadas: número de microorganismos totais do solo, número de propágulos de F. solani, atividade microbiológica total do solo e severidade da doença em plântulas. Os resultados indicaram que a densidade de inóculo do fungo variou com o tipo de solo. Para um solo não cultivado a densidade necessária para causar a doença esteve acima de 5.127 propágulos por grama de solo, enquanto para o solo cultivado a densidade de inóculo para causar doença foi de 3.701 propágulos por grama de solo. Os índices de doença em plântulas cultivadas sob o solo cultivado foram duas vezes superiores ao índice de doença de plântulas sob o solo não cultivado. A atividade microbiológica total nos solos, determinada pela desidrogenase de fluorescina diacetato, não se correlacionou com a população dos microorganismos, indicando que a simples presença desses não implica em que estejam ativos.

    PALAVRAS-CHAVE: Solo supressivo; solo conducivo; Phaseolus vulgaris.

    Four densities of Fusarium solani inoculum (1, 2, 4 and 8 g/L of soil were tested for determining the minimum inoculum density for the occurrence of bean dry root rot, in two soil types. The response variables evaluated were the total number of microorganisms in the soil, the number of F. solani f. sp. phaseoli propagules, total soil microbial activity and seedling disease severity

  1. "In vitro" evaluation of the apical sealing of root canals obturated with different techniques Avaliação "in vitro" do selamento apical dos canais radiculares em função de diferentes técnicas de obturação

    Directory of Open Access Journals (Sweden)

    Viviane Haiub Brosco

    2003-09-01

    Full Text Available The purpose of this study was to compare the apical sealing of root canals obturated with different techniques. One hundred-six human mandibular incisors were submitted to instrumentation by means of the step-back technique. After instrumentation, one hundred teeth received an impermeable coating on the external surfaces of the crown and root (except for the area nearby the apical foramen. Afterwards, they were divided in five groups containing twenty elements each, according to the obturation technique employed: 1. lateral condensation with Kerr file; 2. continuous wave of condensation technique with System B; 3. thermoplasticized injectable gutta-percha technique with the Ultrafil system; 4. mechanically thermoplasticized gutta-percha with the JS Quick-Fill system and 5. thermoplasticized gutta-percha associated to a master cone with the Microseal system. The six remaining teeth were employed as negative and positive controls. After obturation, the access cavities were sealed and the teeth were immersed in aqueous 2% methylene blue dye for 72 hours at 37ºC. After that, the teeth were longitudinally sectioned and the apical microleakage was evaluated in a stereomicroscope. The Microseal system presented the best apical sealing ability, followed by System B, JS Quick-Fill, Ultrafil and the lateral condensation technique. The statistical analysis of the results demonstrated that: 1. the Microseal system presented an apical sealing similar to System B and better than the other groups; 2. System B presented better apical sealing than the lateral condensation technique, being similar to the other groups; and 3. the lateral condensation, Ultrafil and JS Quick-Fill groups demonstrated similar sealing ability.Este estudo teve como objetivo avaliar o selamento apical de canais radiculares obturados por diferentes técnicas. Cento e seis incisivos inferiores humanos tiveram seus canais instrumentados através da técnica escalonada regressiva. Após a

  2. Estímulo do comportamento fotoautotrófico durante o enraizamento in vitro de Annona glabra L., I. desenvolvimento do sistema radicular e da parte aérea Stimulus of the photoautotrophic behavior during the in vitro rooting of Annona glabra L., I. development of root system and shoot

    Directory of Open Access Journals (Sweden)

    José Raniere Ferreira de Santana

    2008-02-01

    Full Text Available Conduziu-se este trabalho, com o objetivo de induzir a estímulo do comportamento fotoautotrófico durante o enraizamento in vitro em brotações de Annona glabra L. Brotações oriundas de cultivo em tubos fechados com tampa e película de PVC (cultivo sem aeração, com tampa sem a película de PVC e tampão de algodão (cultivo com aeração foram inoculadas em meio WPM suplementado com 4,9 µ M de AIB e 164,4mM de carvão ativado na presença (58,42mM ou ausência de sacarose. Durante o enraizamento, foram mantidas as mesmas condições de vedação dos tubos de ensaio em que as brotações foram induzidas. Após a inoculação, os tubos contendo os explantes foram mantidos em sala de crescimento sob radiação fotossintética ativa de 45-56 µ mol.m-2.s-1 a 25±3ºC. Os resultados mostraram que o enraizamento das brotações de A. glabra não dependeu do suprimento de sacarose no meio de cultura, em tubos fechados com o tampão de algodão ou tampa plástica sem PVC. A aeração dos tubos de ensaio trouxe incrementos de significativos (até 250% na matéria seca radicular. A indução de raízes secundárias (laterais em A. glabra só ocorreu em culturas com aeração, independentemente da presença ou ausência de sacarose no meio de cultura. Com os resultado desse experimento, conclui-se que o estímulo do comportamento fotoautotrófico em A.glabra pode ser obtido com sucesso durante a fase de enraizamento in vitro.The objective of the present work was to evaluate whether Annona glabra L. shoots are able to acquire the photoautotrophic behavior during the in vitro rooting. In vitro A. glabra shoots originated from cultures in vessels sealed with cap and PVC film (culture without aeration, cap without PVC film or cotton tampon (cultures with aeration, were inoculated in WPM medium supplemented with 4.9 µ M IBA and 164,4mM activated charcoal in the presence (58.42mM or absence of sucrose. During rooting, the same conditions in which shoots

  3. Acceptance of irradiated food: an education issue; Aceitacao de alimentos irradiados: uma questao de educacao

    Energy Technology Data Exchange (ETDEWEB)

    Modanez, Leila

    2012-07-01

    The commercial use of irradiated food technology in Brazil has a slow growing due to misinterpretation by most Brazilian consumers, who have been mislead by wrong ideas about the meaning of what is nuclear energy. Researches indicate that consumers have difficult in accepting such a technology due to the confusion between the terms irradiation and radioactivity, which are often related to health risks. When properly informed about the process, its purpose and the benefits offered by food irradiation technology, most consumers react positively. Therefore, this work aims to: first, to evaluate the acceptance of irradiated foods by Brazilian consumers; second, to verify the teaching at school about the food irradiation process; third, to analyze the Brazilian school curriculum from elementary school to high school, regarding nuclear energy applications; then, to compare the content taught in Brazil with the content covered in other surveyed countries, such as France, United States, and China. The methodology of this study consisted of a systematic survey of the specific literature, and a questionnaire to verify the acceptance of irradiated food by Brazilian consumers. According to the researched bibliography, it was clear the recommendation of an early school education about the usage of nuclear energy, more specifically, food irradiation. Such a recommendation is due to the fact that the consulted costumers, in Brazil and other countries mentioned in this work, do not clearly understand the full benefits of irradiated food. Hence, education is fundamental for the acceptance of new technologies by consumers, as it is the case with irradiated food. (author)

  4. Health Care Service for Irradiated and Contaminated Individuals; Servicio medico especializado. Asistencia a irradiados y contaminados

    Energy Technology Data Exchange (ETDEWEB)

    Herranz Crespo, R.

    2007-07-01

    Since the Radiopathology Centre, CRP, of Madrid's Hospital General Universitario Gregorio Maranon, HGUGM, began operating as a Health Care Service for Irradiated and Contaminated Individuals, it has gained experience over 22 years of official activity, since its recognition in 1985. This experience is described by the author along with the availability of resources and the reasonable use of these resources for a radiological emergency situations. A proper assessment of the Physical and Biological dosimetry can lead to confirmation of the dose supposedly received by the individual referred because of suspected overexposure. The CRPs Biological Dosimetry procedure is described, with its indications and means of evaluation, which has led to dose-effect curves and basal studies in different populations for subsequent practical application. The typification of radiological emergencies and the data to be collected in the event that casualties are referred to the CRP have led to proposals for action guidelines that aim to simplify the applicable procedures, including eventual prophylaxis with Iodine and the appropriate use of chelating agents. Finally, the resources and portfolio of services that ensure the operability of the CRP are described, together with identification of the procedures of communication with the CRP. (Author)

  5. Thermoluminescence in alkali halides irradiated at 80K; Termoluminiscencia en haluros alcalinos irradiados a 80K

    Energy Technology Data Exchange (ETDEWEB)

    Jimenez de Castro, M

    1978-07-01

    The thermoluminescence, the thermally stimulated currents and the thermal stability of the F centres induced in pure NaCl and KC1 crystals by X irradiation at 80K have been studied in detail, In the range between 80 and 300K. The thermoluminescent processes induced by illumination at 80K with F light in samples previously irradiated at room temperature has also been studied. It has been clearly observed the existence of thermoluminescent processes due to electrons and holes thermally released from traps, in which the F centres are not involved. The existence of hole-F centre recombination has not been observed. There are several thermoluminescent processes in both materials which are scribed to the recombination of F centres with mobile interstitial halogen atoms thermally released from traps, which are likely monovalent impurities in this temperature interval. The light emitting stage in these processes is originated by the formation of self trapped excitons. (Author) 66 refs.

  6. Comet assay in the detection of irradiated garlic; Teste do cometa na deteccao de alho irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Villavicencio, Anna Lucia C.H.; Marin-Huachaca, Nelida Simona; Romanelli, Maria Fernanda [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)]. E-mail: villavic@net.ipen.br; Delincee, Henry [Federal Research Centre for Nutrition - BFE, Karlsruhe (Germany)]. E-mail: henry.delincee@bfe.uni-karlsruhe.de

    2002-07-01

    The increased claim for fresh produce has forced a consensus between nations to pay more attention to the phytosanitary regulations. Inhibition of sprouting of bulbs and tubers by applying ionising radiation is authorised by the National Food Codes in Brazil. The availability of methods for detection of irradiated food will contribute to increase consumers' confidence. A quick and simple screening test to indicate whether a food product has been irradiated or not was utilised in this study. The DNA comet assay was applied to verify whether garlic imported from China had been irradiated or not. This test has already been adopted as a European Standard (EN 13784), for detection of irradiated food. Non-irradiated control samples of garlic and garlic treated with maleic hydrazide were compared with garlic samples irradiated in our department. The unirradiated samples exhibited only limited DNA migration. If samples were irradiated, an increased DNA fragmentation was observed which permitted the discrimination between non-irradiated and irradiated samples. Since the garlic samples from China showed only very limited DNA fragmentation, they were deemed non-irradiated. Thus, this simple screening test was shown to be successful for identification of an irradiation treatment. (author)

  7. System of leak inspection of irradiated fuel; Sistema de inspeccion de fuga de combustible irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Delfin L, A.; Castaneda J, G.; Mazon R, R.; Aguilar H, F. [ININ, 52750 La Marquesa, Estado de Mexico (Mexico)]. e-mail: rmr@nuclear.inin.mx

    2007-07-01

    The International Atomic Energy Agency (IAEA) through the project RLA/04/18 Irradiated Fuel Management in Research reactors, recommended among other that the participant countries (Brazil, Argentina, Chile, Peru and Mexico), develop the sipping tool to generate registrations of the state that keep the irradiated fuels in the facilities of each country. The TRIGA Mark lll Reactor (RTMIII) Department, generated a project that it is based on the dimensions of the used fuel by the RTMIII, for design and to build an inspection system of irradiated fuel well known as SIPPING. This technique, provides a high grade of accuracy in the detection of gassy fission products or liquids that escape from the enveloping of fuels that have flaws or flights. The operation process of the SIPPING is carried out generating the migration of fission products through the creation of a pressure differential gas or vacuum to identify fuel assemblies failed by means of the detection of the xenon and/or krypton presence. The SIPPING system, is a device in revolver form with 4 tangential nozzles, which will discharge the fluid between the external surface of the enveloping of the fuel and the interior surface of the encircling one; the device was designed with independent pieces, with threaded joining and with stamps to impede flights of the fluid toward the exterior of the system. The System homogenizes and it distributes the fluid pressure so that the 4 nozzles work to equality of conditions, for what the device was designed in 3 pieces, an internal that is denominated revolver, one external that calls cover, and a joining called mamelon that will unite with the main encircling of the system. The detection of fission products in failed fuels, its require that inside the encircling one where the irradiated fuel element is introduced, be generated a pressure differential of gas or vacuum, and that it allows the samples extraction of water. For what generated a top for the encircling with the previous end that acts automatically by pneumatic mediums and it fixes the fuel element in their superior part. (Author)

  8. Agricultural yields of irradiated sewage sludge; Rendimiento agricola de barros cloacales irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Magnavacca, Cecilia; Miranda, E; Sanchez, M [Comision Nacional de Energia Atomica, Ezeiza (Argentina). Centro Atomico Ezeiza

    1999-07-01

    Lettuce, radish and ryegrass have been used to study the nitrogen fertilization of soil by sewage sludge. The results show that the irradiated sludge improve by 15 - 30 % the production yield, compared to the non-irradiated sludge. (author)

  9. Transport safety of irradiated fuel; Seguridad en el transporte de combustible irradiado.

    Energy Technology Data Exchange (ETDEWEB)

    Rosa Giménez, R. de la

    2016-07-01

    The complication of the transport of spent fuel is significant not only because of the danger of the transported good itself but also for the size of the package. The number of this kind of expeditions are supposed to increase considerably in the coming years, for that reason is necessary for specialized companies such as ETSA be prepared. To this end, ETSA has already implemented most of the measures necessary to ensure safety - security of transport, not only during its execution but throughout the preparation.

  10. Educative campaign about information on irradiated foods; Campana educativa sobre informacion de alimentos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Luna C, P C

    1991-07-15

    The irradiation of foods is accepted by international agencies (FAO, OMS) like a healthy and effective technology at the moment the irradiated foods are marketed easily in many countries, however in other countries exist several factors that affect the practical application of this process. In this work is planned about an educational campaign about the irradiation process directed to the consumers. (Author)

  11. Comparison of the Economic Aspects of the Treatment and Storage of Fission Products from Installations Processing Irradiated Natural Uranium; Aspects Economiques Compares du Traitement et du Stockage des Produits de Fission Issus des Usines de Traitement de l'Uranium Naturel Irradie; Sravnitel'nye ehkonomicheskie aspekty obrabotki i khraneniya produktov deleniya, poluchaemykh na zavodakh po pererabotke obluchennogo prirodnogo urana; Aspectos Economicos Comparados del Tratamiento y del Almacenamiento de los Productos de Fision que Salen de las Plantas de Tratamiento de Uranio Natural Irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Thiriet, L.; Lesur, P.; Giraud, R. [Commissariat a l' Energie Atomique, Paris (France); Wanlin, J. [Societe Saint-Gobain Techniques Nouvelles, Paris (France)

    1966-02-15

    reservoirs pouvant etre construits, et on determine la taille et la cadence optimales de leur mise en service, compte tenu des caracteristiques des produits de fission a stocker et pour diverses capacites de l'usine de traitement de l'uranium naturel irradie. Ils montrent que, si le cout de stockage depend des hypotheses faites sur la duree de vie des installations, le taux d'interet, les frais d'exploitation, le choix de la politique optimale par contre (tailles et cadences de mise en service) est independant de ces hypotheses et n'est lie qu'a la loi de variation du cout des reservoirs selon leur taille. On obtient ainsi le cout optimise de stockage indefini de ces effluents. Dans une troisieme partie, les auteurs comparent a cette solution du stockage indefini d'autres politiques possibles de gestion des produits de fission: vitrification et separation du Cs et du Sr. Ils situent economiquement ces diverses alternatives et esquissent des solutions possibles a long terme. (author) [Spanish] Despues de recordar las principales practicas administrativas que suelen aplicarse a los productos de fision, los autores exponen sucintamente las caracteristicas tecnicas esenciales de las instalaciones de almacenamiento en acero inoxidable (en medio acido) utilizadas en Francia y analizan la estructura de sus costos. Muestran hasta que punto esos costos dependen de la radiactividad de las soluciones almacenadas y del calor que desprenden. En la segunda parte de la memoria se examina el costo del almacenamiento segun las dimensiones de los depositos que pueden construirse, se determinan las dimensiones optimas de estos depositos y se indica el ritmo mas conveniente para su puesta en servicio teniendo en cuenta las caracteristicas de los productos de fision que es preciso almacenar y las diversas capacidades de las plantas de tratamiento de uranio natural irradiado. Se demuestra que si bien el costo del almacenamiento depende de algunas hipotesis (duracion de la vida util de las

  12. Histomicrobiologic aspects of the root canal system and periapical lesions in dogs' teeth after rotary instrumentation and intracanal dressing with Ca(OH2 pastes Aspectos histomicrobiológicos do sistema de canais radiculares e das lesões periapicais em dentes de cães após instrumentação automatizada e medicação intracanal com pastas de Ca(OH2

    Directory of Open Access Journals (Sweden)

    Janir Alves Soares

    2006-10-01

    Full Text Available OBJECTIVE: The purpose of this study was to evaluate the distribution of microorganisms in the root canal system (RCS and periapical lesions of dogs' teeth after rotary instrumentation and placement of different calcium hydroxide [Ca(OH2]-based intracanal dressings. MATERIALS AND METHODS: Chronic periapical lesions were experimentally induced in 80 premolar roots of four dogs. Instrumentation was undertaken using the ProFile rotary system and irrigation with 5.25% sodium hypochlorite. The following Ca(OH2-based pastes were applied for 21 days: group 1 - Calen (n=18; group 2 - Calen+CPMC (n=20; group 3 - Ca(OH2 p.a. + anaesthetic solution (n=16 and group 4 - Ca(OH2 p.a.+ 2% chlorhexidine digluconate (n=18. Eight root canals without endodontic treatment constituted the control group. Histological sections were obtained and stained with Brown & Brenn staining technique to evaluate the presence of microorganisms in the main root canal, ramifications of the apical delta and secondary canals, apical cementoplasts, dentinal tubules, areas of cemental resorption and periapical lesions. The results were analyzed statistically by the Mann-Whitney U test (p0.05. The percentage of RCS sites containing microorganisms in groups 1, 2, 3, 4 and control were: 67.6%, 62.5%, 78.2%, 62.0% and 87.6%, respectively. CONCLUSION: In conclusion, the histomicrobiological analysis showed that the rotary instrumentation and the different calcium hydroxide pastes employed did not effectively eliminate the infection from the RCS and periapical lesions. However, several bacteria seen in the histological sections were probably dead or were inactivated by the biomechanical preparation and calcium hydroxide-based intracanal dressing.OBJETIVO: Neste estudo avaliou-se a distribuição dos microrganismos no sistema de canais radiculares (SCR e região periapical (RP de cães após instrumentação automatizada e utilização de pastas à base de hidróxido de cálcio CaO(H2

  13. Diversity and efficiency of bradyrhizobium strains isolated from soil samples collected from around sesbania virgata roots using cowpea as trap species Diversidade e eficiência simbiótica de estirpes de bradyrhizobium capturadas próximo ao sistema radicular de sesbania virgata usando caupi como planta-isca

    Directory of Open Access Journals (Sweden)

    Ligiane Aparecida Florentino

    2010-08-01

    Full Text Available The genetic diversity of ten Bradyrhizobium strains was evaluated for tolerance to high temperatures, to different salinity levels and for the efficiency of symbiosis with cowpea plants (Vigna unguiculata (L. Walp.. Eight of these strains were isolated from nodules that appeared on cowpea after inoculation with suspensions of soil sampled from around the root system of Sesbania virgata (wand riverhemp in ecosystems of South Minas Gerais. The other two strains used in our analyses as references, were from the Amazon and are currently recommended as cowpea inoculants. Genetic diversity was analyzed by amplifying repetitive DNA elements with the BOX primer, revealing high genetic diversity with each strain presenting a unique band profile. Leonard jar assays showed that the strains UFLA 03-30 and UFLA 03-38 had the highest N2-fixing potentials in symbiosis with cowpea. These strains had more shoot and nodule dry matter, more shoot N accumulation, and a higher relative efficiency than the strains recommended as inoculants. All strains grew in media of pH levels ranging from 4.0 to 9.0. The strains with the highest N2-fixing efficiencies in symbiosis with cowpea were also tolerant to the greatest number of antibiotics. However, these strains also had the lowest tolerance to high salt concentrations. All strains, with the exceptions of UFLA 03-84 and UFLA 03-37, tolerated temperatures of up to 40 ºC. The genetic and phenotypic characteristics of the eight strains isolated from soils of the same region were highly variable, as well as their symbiotic efficiencies, despite their common origin. This variability highlights the importance of including these tests in the selection of cowpea inoculant strains.Dez estirpes de rizóbios, sendo oito isoladas de amostras de solos coletadas próximo ao sistema radicular de Sesbania virgata, no Sul de Minas Gerais, e duas recomendadas como inoculante para o caupi (Vigna unguiculata (L. Walp. usadas como refer

  14. Efeito de herbicidas residuais, aplicados por vários anos consecutivos, na distribuição do sistema radicular da laranjeira Natal (Citrus sinensis.(L. osbeck Effects of residual herbicides, applyed for several years son the root system distribution of 'Natal' orange (Citrus sinensis L. osbeck

    Directory of Open Access Journals (Sweden)

    R Victória Filho

    1985-12-01

    detectaram diferenças estatisticamente significativas nas quantidades de radicelas entre as parcelas dos vários tratamentos com herbicidas, excluindo-se desta forma, qualquer efeito negativo de tais produtos químicos sobre o sistema radicular das laranjeiras.This experiment was carried out at the orchard of Faculdade de Ciências Agrárias e Veterinárias - Campus de Jaboticabal - UNESP, with the objective to verify the influence of the continuous use of several residual herbicides on radicals distribution of 'Natal' orange (Citrus sinensis (L. Osbeck grafted on 'Cravo' lemon (Citrus Limonia Osbeck ; they were planted on january, 1970, in a soil classified as Orthox with 1,6% of organic matter. The test had a randomized blocks experimental design in a 11 3x2x2 factorial design with three eplications. Treatments with their respe ctive doses (kg a.i/ha were: fluometuron at 4. 2; simazine at 4.8; atrazine at 4.8; bromacil at 3.2; bromacil (40% + diuron (40% at 4.8; bromacil(53.3%+ diuron (26.7% at 4.8; terb acil at 3.2; oxadiazon at 1.5; dichlobe - nil at 3.0 and 6.0, and a control with cleaning. The study of radi cels was done by the "anger method" by taking soil samples containing radicels at the distances of 80, 160 and 240 cm from the trunk at layer s of 0-15 cm and 15-30 cm of depth and in two disti nct diret ions (between lines and between plants. Results showed that radicels are superficially located, being 70% of them in the layer of 0-15 cm of soil depth and the total amount of them in the layer of 030 cm of depth. About 75% of the radicels are located till a distance of 160 cm from the trunk. In the upper soil layer (0 - 15-ccm, the amount of radicels markedly decreases as increases the distance from the trunk. In the layer of 15-30 cm, there occurred an horizontal and more uniform distribution of radicels when compared with the 0-15 cm layer. No diffe rences were found for the radicels amount among the different treat ments showing that these herbicides have no

  15. National Seminar. Acceptation and Commerce of Irradiated Foods. Memories; Seminario Nacional. Aceptacion y Comercio de Alimentos Irradiados. Memorias

    Energy Technology Data Exchange (ETDEWEB)

    Pan-American Health Organization

    1998-12-31

    The foods availability is a worldwide problem at present, it looks two paradoxical aspects at first appearance. The malnutrition grade and the great losses by rottenness after the harvest time. An alternative to reduce these losses is the use of modern technologies such as food irradiation, which is a recognized process as like as secure and efficient how a conservation process by the FAO, the WHO and the Codex Alimentarius Commission. At present this process is accepted in 40 countries. Since 1986 the National Institute of Nuclear Research in Mexico offers irradiation services to the dried foods enterprises. This work contains magistral conferences dictated by international experts, reflecting the situation of this technology at the present time, the consumer position about the acceptance of irradiated foods, as well as regulations and standards applied in different continents. In the process part there are the installations would be required and the control to carry out. (Author)

  16. Color formation on irradiated polystyrene by electrons beam; Formacao de cor no poliestireno irradiado com feixes de eletrons

    Energy Technology Data Exchange (ETDEWEB)

    Nardi, Daniela T.; Guedes, Selma M.L. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)]. E-mail: smguedes@ipen.br

    2005-07-01

    The color formation on national and commercial polystyrene (PS) irradiated by electrons beam was investigated in function of dose (0-150 kGy), post-irradiation time (0-31 days) and heating by colorimetry (CIELab), electron spectroscopy resonance (RPE) and photoacoustic infrared spectroscopy (FTIR-PAS). Visually or by colorimetric parameters the radiation became the PS yellow and dark which intensified by increase the dose and disappeared after the post-irradiation time. Variations of green/red colors were insignificant. After post irradiation time of 30 days (150 kGy) or the heating (150 kGy) both yellow color and darkening decreased significantly showing the unstable color centers formation during the irradiation. The RPE spectra indicated that the radicals can be responsible by the formation of these color centers but there can not be responsible s by stable color centers. The FTIR-PAS spectra did not show the presence of different functional groups after irradiation. The PS studied can be radiosterilized (25 kGy) without significant colorimetric changes because it is radioresistant. (author)

  17. Phase transformations in lithium aluminates irradiated with neutrons; Transformaciones de fase en aluminatos de litio irradiados con neutrones

    Energy Technology Data Exchange (ETDEWEB)

    Carrera, L.M.; Delfin L, A.; Urena N, F.; Basurto, R. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico); Bosch, P. [UAM-I, 09340 Mexico D.F. (Mexico)

    2003-07-01

    The lithium aluminate like candidate to be used in the coverings producers of tritium in the fusion nuclear reactors, presents high resistance to the corrosion to the one to be stuck to structural materials as special steels. However, the crystallographic changes that take place in the cover that is continually subjected to irradiation with neutrons, can alter its resistance to the corrosion. In this work the changes of crystalline structure are shown that they present two types of nano structures of lithium aluminates, subjected to an average total dose 7.81 x 10{sup 8} Gy in the fixed irradiation system of capsules of the one TRIGA Mark lll nuclear reactor of the Nuclear Center of Mexico. The studied nano structures presented only phase transformations without formation of amorphous material. (Author)

  18. EPR dosimetry in tooth enamel by x radiation; Dosimetria EPR en esmalte dental irradiado con rayos X

    Energy Technology Data Exchange (ETDEWEB)

    Dubner, Diana; Perez, Maria del Rosario; Gisone, P. [Autoridad Regulatoria Nuclear, Buenos Aires (Argentina)] E-mail: ddubner@cae.arn.gov.ar; Fainstein, C.; Winkler, E. [Comision Nacional de Energia Atomica (CNEA), San Carlos de Bariloche (Argentina). Centro Atomico Bariloche]|[Universidad Nacional de Cuyo, Mendoza (Argentina). Inst. Balseiro; Saravi, Margarita [Comision Nacional de Energia Atomica (CNEA) (Argentina). Centro Atomico Ezeiza; Davila, Francisco [Ateneo Argentino de Odontologia, Buenos Aires (Argentina)

    2001-07-01

    Tooth enamel, extracted from molars, was irradiated with 66 keV X-rays, with doses up to 1 Gy. The preparation of the powder samples is described, as well as the protocol for the acquisition and processing of the spectra. The radiation induced paramagnetism is measured, at room temperature, by ESR spectroscopy. The ESR spectra is well described considering two paramagnetic species, with magnetic moments (in units of Bohr magnetrons) g=2,0041, and g1=2,0018, g2=1,9972. The ESR data (peak-to-peak amplitude per mg, hpp/mg, vs dose D), for doses 0 Gy

  19. Separation of Protactinium from Neutron Irradiated Thorium Oxide; Separacion de Protactinio de Oxido de Torio Irradiado con Neutrones

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez, G; Gutierrez, L; Ropero, M

    1983-07-01

    The chemical separation of thorium and protactinium can be carried out by leaching most of the last one, about 95%, with aqueous HF from neutron irradiated thorium oxide. This leaching reaction la highly favored by the transformation reaction of the ThO{sub 2} material into ThF{sub 4}. For both reactions, leaching and transformation, the reagents concentration, agitation speed and temperature influences were studied and the activation energies were found. (Author) 18 refs.

  20. National Seminar. Acceptation and Commerce of Irradiated Foods. Memories; Seminario Nacional. Aceptacion y Comercio de Alimentos Irradiados. Memorias

    Energy Technology Data Exchange (ETDEWEB)

    Pan-American Health Organization

    1999-12-31

    The foods availability is a worldwide problem at present, it looks two paradoxical aspects at first appearance. The malnutrition grade and the great losses by rottenness after the harvest time. An alternative to reduce these losses is the use of modern technologies such as food irradiation, which is a recognized process as like as secure and efficient how a conservation process by the FAO, the WHO and the Codex Alimentarius Commission. At present this process is accepted in 40 countries. Since 1986 the National Institute of Nuclear Research in Mexico offers irradiation services to the dried foods enterprises. This work contains magistral conferences dictated by international experts, reflecting the situation of this technology at the present time, the consumer position about the acceptance of irradiated foods, as well as regulations and standards applied in different continents. In the process part there are the installations would be required and the control to carry out. (Author)

  1. Quality control in the commerce of irradiated foods; Control de calidad en el comercio de alimentos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Bustos R, M.E. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2000-07-01

    In spite of an irradiated food is innocuous for health and that the irradiation process offers great advantages as conservation and hygiene method and it has been recognised by the Agriculture and Health International organizations and although the adequate equipment exists to make this treatment in the majority of countries, an international trade of irradiated foods has not been established and it is that it has to be required that the quality control of the treatment should be regulated by the corresponding authorities and it also should be harmonized with other countries for the commercial interchange. Owing to up to present an identification method of irradiated foods which is validated, the unique quality control for irradiated foods is realized in the irradiation plant, measuring the absorbed dose in products, using dosimetric systems justly calibrated and standardized to be used the adequate for the type of product and dose level which is wanted to be measured for foods mainly for quarantine treatment which is very important to determine that any part of the irradiation system has reached the minimum dose to obtain the technical effect which is desired and that it does not exceed the maximum dose for that the product quality not to be altered. (Author)

  2. Physico-chemical evaluation of radiation effects on apple juice; Avaliacao fisico-quimica do suco de maca irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Blumer, Lucimara; Domarco, Rachel E.; Spoto, Maria H.F.; Walder, Julio M.M.; Matraia, Clarice [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil)

    1997-12-01

    Gala and Fuji varieties apple`s juice were clarified with enzyme and irradiated aiming to extend the shelf-life without conservants and chemical additives. The juices were analysed for soluble solids, titrable acidity, pH and color. Results showed effect of storage periods in soluble solids, pH and color. The variety and storage period modified the titrable acidity. The pH was altered by irradiation dose and the storage period. (author). 9 refs., 6 figs.

  3. DRENAGEM SUPERFICIAL DE SOLOS ARGILOSOS DO NORTE DO PARANÁ

    Directory of Open Access Journals (Sweden)

    Rogério Teixeira de Faria

    1999-08-01

    Full Text Available RESUMO Foi avaliado o desempenho de práticas de drenagem superficial e cobertura morta em uma área de várzea do norte do Paraná. Antes e após o cultivo do arroz, foram comparadas as taxas de drenagem em tratamentos com e sem drenos torpedo e determinadas a vazão e a obstrução dos condutos. Sob o cultivo do feijoeiro, foram avaliados os efeitos dos drenos torpedo e de "camas" na drenagem e de cobertura morta (palha de arroz na retenção de água do solo. Os resultados indicaram que os drenos torpedo foram mais eficientes se construídos com solo menos úmido, porém sua longevidade foi menor que um ano. Sob o feijoeiro, os drenos torpedo e cobertura morta mantiveram o lençol freático mais profundo e o solo com menor tensão de umidade, mas esses efeitos ocorreram abaixo da zona radicular (15 cm, resultando em baixa produtividade.

  4. Development of a patient-reported outcome instrument for patients with lumbar radicular pain

    DEFF Research Database (Denmark)

    Ibsen, Charlotte; Schiøttz-Christensen, Berit; Handberg, Charlotte

    and ICF Rehabilitation Set. Items in the ICF-PRO are developed within methods and terminology of The Patient-Reported Outcomes Measurement Information System (PROMIS®). The development process contains five phases (figure 1). Results This poster presents preliminary results from phase 1-3. 89...... the focus group identified three themes: 'Simplicity', 'Application' and 'Individuality' representing elements of most importance for the patients toward a patient centered consultation (figure 2). Conclusions We found that ‘Simplicity’, ‘Application’ and ‘Individuality’ was essential to patients to lead...

  5. Treatment of combined endodontic: periodontic lesion by sealing of palato-radicular groove using biodentine

    OpenAIRE

    Naik, Mayuri; de Ataide, Ida de Noronha; Fernandes, Marina; Lambor, Rajan

    2014-01-01

    Introduction: Palatoradicular groove is a developmental anomaly which is predominantly found in maxillary lateral incisors. It provides a susceptible alcove for the progression of localised periodontal inflammation which can further cause pulpal involvement. This case report describes the successful treatment of a large periodontic - endodontic lesion usingnon surgical endodontic therapy and biodentine for the sealing of the palatoradicular groove.

  6. Treatment of combined endodontic: periodontic lesion by sealing of palato-radicular groove using biodentine.

    Science.gov (United States)

    Naik, Mayuri; de Ataide, Ida de Noronha; Fernandes, Marina; Lambor, Rajan

    2014-11-01

    Palatoradicular groove is a developmental anomaly which is predominantly found in maxillary lateral incisors. It provides a susceptible alcove for the progression of localised periodontal inflammation which can further cause pulpal involvement. This case report describes the successful treatment of a large periodontic - endodontic lesion usingnon surgical endodontic therapy and biodentine for the sealing of the palatoradicular groove.

  7. Materiales de obturación radicular utilizados en dientes deciduos

    Directory of Open Access Journals (Sweden)

    Trejo-A

    2014-01-01

    Full Text Available La caries y traumatismos son las principales causas de urgencias en odontología pediátrica. Estas afecciones pueden llegar a ejercer un daño irreversible en el tejido pulpar comprometiendo la permanencia de los órganos dentarios afectados. Para limitar el daño pulpar y evitar la extracción de piezas temporales se han diseñado distintas técnicas que van desde recubrimientos pulpares hasta un tratamiento más radical como la pulpectomía. Ésta última consiste en la extirpación del tejido pulpar, la limpieza y desinfección del sistema de conductos y la obturación de los mismos. Diversos autores han descrito las características ideales que debe presentar un material obturador de conductos de la dentición temporal, en los que se incluyen actividad bactericida y bacteriostática, adecuado sellado tridimensional, biocompatibilidad y reabsorción del material a una velocidad similar que las raíces. Desde hace largo tiempo se han desarrollado diversos materiales para cumplir con las exigencias que demanda la técnica. Dentro de los primeros materiales surgidos con éste propósito se encuentran el Óxido de Zinc con Eugenol, Hidróxido de Calcio y materiales a base de yodoformo, con el tiempo surgieron combinaciones de estos materiales para aumentar las ventajas y disminuir las desventajas. De éstos, las pastas yodoformadas con Hidróxido de Calcio son los que han tenido mayor aceptación.

  8. Can intra-radicular cleaning protocols increase the retention of fiberglass posts? A systematic review

    Directory of Open Access Journals (Sweden)

    Lilian Vieira OLIVEIRA

    2018-03-01

    Full Text Available Abstract The presence of residues within the root canal after post-space preparation can influence the bond strength between resin cement and root dentin when using fiberglass posts (FGPs. Currently, there is no consensus in the literature regarding what is the best solution for the removal of debris after post-space preparation. This systematic review involved “in vitro” studies to investigate if cleaning methods of the root canal after post-space preparation can increase the retention of FGPs evaluated by the push-out test. Searches were carried out in PubMed (MEDLINE and Scopus databases up to July2017. English language studies published from 2007 to July 2017 were selected. 475 studies were found, and 9 were included in this review. Information from the 9 studies were collected regarding the number of samples, storage method after extraction, root canal preparation, method of post-space preparation, endodontic sealer, resin cement, cleaning methods after post-space and presence of irrigant activation. Five studies presented the best results for the association of sodium hypochlorite (NaOCl and ethylenediamine tetra-acetic acid (EDTA, while in the other 4 studies, the solutions that showed improved retention of FGPs were photon-induced photoacoustic streaming (PIPS, Qmix, Sikko and EDTA. The results showed heterogeneity in all comparisons due to a high variety of information about cleaning methods, different concentrations, application time, type of adhesive system and resin cements used. In conclusion, this review suggests that the use of NaOCl/EDTA results in the retention of FGPs and may thus be recommended as a post-space cleaning method influencing the luting procedure.

  9. Radicular dysfunction due to spinal deformities in Marfan syndrome at older age: three case reports.

    NARCIS (Netherlands)

    Voermans, N.C.; Hosman, A.J.F.; Alfen, N. van; Bartels, R.H.M.A.; Kleuver, M. de; Akker, J.W. op den; Engelen, B.G.M. van

    2010-01-01

    Marfan syndrome is a inherited connective tissue disorder due to mutations in fibrillin-1. It presents with cardiovascular, ocular, skeletal, pulmonary and dural signs and symptoms. Some of the symptoms of later onset are those associated with scoliosis and dural ectasia. This is the enlargement of

  10. COMPARISON OF THE EFFECTIVENESS OF RADICULAR BLOCKING TECHNIQUES IN THE TREATMENT OF LUMBAR DISK HERNIA

    Directory of Open Access Journals (Sweden)

    Igor de Barcellos Zanon

    2015-12-01

    Full Text Available Objective : Compare the interlaminar blocking technique with the transforaminal blocking, with regard to pain and the presence or absence of complications. Methods : Prospective, descriptive and comparative, double-blind, randomized study, with 40 patients of both sex suffering from sciatic pain due to central-lateral or foraminal disc herniation, who did not respond to 20 physiotherapy sessions and had no instability diagnosed on examination of dynamic radiography. The type of blocking, transforaminal or interlaminar, to be performed was determined by draw. Results : We evaluated 40 patients, 17 males, mean age 49 years, average VAS pre-blocking of 8.85, average values in transforaminal technique in 24 hours, 7, 21, and 90 days of 0.71, 1.04, 2.33 and 3.84, respectively; the average VAS post-blocking for interlaminar technique was 0.89, 1.52, 3.63 and 4.88. The techniques differ only in the post-blocking period of 21 days and overall post-blocking, with significance of p=0.022 and p=0.027, respectively. Conclusion : Both techniques are effective in relieving pain and present low complication rate, and the transforaminal technique proved to be the most effective.

  11. Fenotipado radicular para la resistencia a la sequía en Solanum spp

    OpenAIRE

    ATUCHA ZAMKOVA, ANASTASIA-AINHOA

    2015-01-01

    [ES] La sequía es un gran problema para la agricultura, ya que destruye o merma considerablemente las cosechas. Por eso la mejora genética de las plantas para la tolerancia a sequía es una necesidad acuciante. Para mejorar las plantas genéticamente, es necesario tener herramientas de fenotipado adecuadas para poder identificar las plantas con las características deseadas. La berenjena cultivada es una planta que es bastante tolerante a la sequía, y posee una gran variedad de especies relac...

  12. Effects of different peracetic acid formulations on post space radicular dentin.

    Science.gov (United States)

    Belizário, Lauriê Garcia; Kuga, Milton Carlos; Castro-Núñez, Gabriela Mariana; Escalante-Otárola, Wilfredo Gustavo; Só, Marcus Vinicius Reis; Pereira, Jefferson Ricardo

    2018-01-05

    The optimal irrigating solution with antimicrobial and dentin cleansing properties for post space preparation for fiber posts is unclear. Peracetic acid is one option but is available in various chemical formulations that require evaluation. The purpose of this in vitro study was to evaluate dentin surface cleanliness based on the presence of a smear layer and the number of open dentin tubules. It also investigates the chemical composition of residues after canal irrigation with a 1% peracetic acid solution (PA) at low or high concentration of hydrogen peroxide during the preparation of intracanal fiber posts. After filling the root canals of 40 mandibular incisors, a rotary instrument was used for intracanal preparation to place fiber posts. The teeth were divided into 4 groups (n=10) according to the post space irrigation protocol as follows: CG (control): distilled water; NA (NaOCl): 2.5% sodium hypochlorite; LH: PA with low concentration of hydrogen peroxide; and HH: PA with high concentrations of hydrogen peroxide. After irrigation, the teeth were sectioned, and the intracanal dentin surface was subjected to analysis using energy dispersive spectroscopy to evaluate chemical composition and to scanning electron microscopy (×500) to evaluate the presence of the smear layer. The number of open dentin tubules was measured by scanning electron microscopy analysis (×2000) using photo-editing software. ANOVA and the Tukey test (α=.05) were used to evaluate the data, except for the presence of a smear layer, for which the Kruskal-Wallis and Dunn tests were used (α=.05). The highest concentrations of oxygen in the dentin residues were detected in LH and HH (P.05). NA had a higher concentration of chlorine (P.05), except for HH, which also had a larger number of open dentin tubules than CG and NA (P<.05). PA 1% with a low concentration of hydrogen peroxide yielded a lower amount of smear layer and a larger number of open dentin tubules in the dentin of the post space when compared with PA 1% with a high concentration of hydrogen peroxide, despite maintaining a similar oxygen concentration in these dentin residues. Copyright © 2017 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.

  13. Capping of the radicular exposed surface (part II). Surgical and not surgical treatment

    OpenAIRE

    Grados Pomarino, Sixto; Estrada, Andrew Alejandro; Maetahara Rubio, Denis Miguel; Guzmán Vera, Yanina Sara; Tello Barbarán, Javier

    2014-01-01

    The gingival recession treatment can be made surgical1y with a high predictability of success due to the great advance during the last ones of the mucogingival surgical techniques. The use of connective grafts in coverage of recessions has obtained high rates of success reason why these procedures are common within the modern periodontal surgical practice. Knowing that all patients do not accept the surgical treatment, many investigators have come studying the possibility of treating non-surg...

  14. Soil Fertility and Radicular System Depth of Sand Coastal Plain Forest

    Science.gov (United States)

    Casagrande, José Carlos; Akemi Sato, Claudia; Reis-Duarte, Rose Mary; Soares, Marcio Roberto; Sérgio Galvão Bueno, Mário

    2010-05-01

    The sand coastal plain vegetation (Restinga Forest) is a type of ecosystem associated with the Atlantic Forest constituted of mosaics, which occur in areas of great ecological diversity. This vegetation is currently assigned as edaphic communities. In this study we present data on soil fertility in different vegetation physiognomies to discuss on abiotic factors related to Restinga Forest stability and recovery potential. This work was carried out in several points of Restinga Forest in the litoral coast of the state of São Paulo, namely: State Park of the Serra do Mar, Picinguaba, in the city of Ubatuba (23°20' e 23°22' S / 44°48' e 44°52' W); State Park of Anchieta Island, in the city of Ubatuba (45°02' e 45°05' W / 23°31' e 23° 45' S); Restinga Forest in the residential joint ownership Riviera of São Lourenço, in the city of Bertioga (46°08' W e 23°51' S); Ecological Station Juréia-Itatins, Ecological Station of Chauas , in the city of Iguape (24°45' S e 47°33' W) and State Park of Cardoso Island, Pereirinha Restinga Forest, in the city of Cananéia (25°03'05" e 25°18'18" S / 47°53'48" e 48° 05'42" W), Brazil. Sampling was carried out as follows in every area above mentioned. One sample was made of 15 subsamples of each area collected in each depth (one in 0 - 5, 5 - 10, 10 - 15, 15 - 20, and another in 0 - 20, 20 - 40, 40 and 60 cm). Soil characteristics analyzed were pH, P, Na, K, Ca, Mg, S, H + Al, Al, B, Cu, Fe, Mn, Zn contents and base saturation, cation exchange capacity and aluminum saturation. All areas investigated showed very low contents of phosphorous, calcium and magnesium. The base saturation, less than 10, was low due to low amounts of Na, K, Ca and Mg, indicating low nutritional reserve into the soil. The nutritional reserve is present primarily in a depth of 15 cm, although mainly in the vegetable biomass. The level of calcium and magnesium were mainly low in the subsurface soil layer, associate with high concentration of aluminum, representing important limiting factor to the root system development in depth (≤ 15 cm). The aluminum saturation values to Restinga Forest reach 80% in depth and calcium varying from 1 to 2 mmolc dm-3. On this view, important questions on Restinga Forest development appears, mainly about species tolerance to aluminum in the soil and about the possibility of initial vegetative improvement as a function of soil fertility increasing, specially because low calcium and high Al decrease the root system development. Comparing the aluminum levels in the root and leaves to Psidium cattleyanum Sabine and Gomidesia Fenzliana O. Berg, the values were very superior in the leaves, indicating that aluminum is not maintained in the root system, being translocated to leaves.

  15. Peripical ostheitis and radicular cites. A proposal of a radio semiological terminology

    Energy Technology Data Exchange (ETDEWEB)

    Palermo, M; Accarino, B; Del Vecchio, E

    1985-01-01

    Radiographical diagnosis and radio-semeiological signs of odontogenical phlogosis of the jaws give us the starting point for some considerations on actual difficulties to utilize an appropriate radiological terminology. The A.A. conclude that is necessary an efficent classification of appropriate radio-semeiological terms.

  16. Dispersion of near-infrared laser energy through radicular dentine when using plain or conical tips.

    Science.gov (United States)

    Teo, Christine Yi Jia; George, Roy; Walsh, Laurence J

    2018-02-01

    The aim of this study was to investigate the influence of tip design on patterns of laser energy dispersion through the dentine of tooth roots when using near-infrared diode lasers. Diode laser emissions of 810 or 940 nm were used in combination with optical fiber tips with either conventional plain ends or conical ends, to irradiate tooth roots of oval or round cross-sectional shapes. The lasers were operated in continuous wave mode at 0.5 W for 5 s with the distal end of the fiber tip placed in the apical or coronal third of the root canal at preset positions. Laser light exiting through the roots and apical foramen was imaged, and the extent of lateral spread calculated. There was a significant difference in infrared light exiting the root canal apex between plain and conical fiber tips for both laser wavelengths, with more forward transmission of laser energy through the apex for plain tips. For both laser wavelengths, there were no significant differences in emission patterns when the variable of canal shape was used and all other variables were kept the same (plain vs conical tip, tip position). To ensure optimal treatment effect and to prevent the risks of inadvertent laser effects on the adjacent periapical tissues, it is important to have a good understanding of laser transmission characteristics of the root canal and root dentine. Importantly, it is also essential to understand transmission characteristics of plain and conical fibers tips.

  17. The use of lumbar epidural injection of platelet lysate for treatment of radicular pain

    NARCIS (Netherlands)

    Centeno, Christopher; Markle, Jason; Dodson, Ehren; Stemper, Ian; Hyzy, Matthew; Williams, Christopher; Freeman, Michael

    2017-01-01

    BACKGROUND: Epidural steroid injections (ESI) are the most common pain management procedure performed in the US, however evidence of efficacy is limited. In addition, there is early evidence that the high dose of corticosteroids used can have systemic side effects. We describe the results of a case

  18. Abordagem clínica a canais radiculares calcificados e/ou atresiados

    OpenAIRE

    Veloso, Ana Catarina Rodrigues

    2017-01-01

    A Endodontia, ramo da Medicina Dentária, tem o objetivo de tratar patologias pulpares, permitindo assim, que as estruturas dentárias sejam mantidas em função na cavidade oral. O sucesso do tratamento depende de uma correta conformação, desinfeção e obturação canalar. Estes procedimentos podem estar comprometidos quando no canal existem calcificações, ou estes se encontram atresiados, impedindo o livre acesso apical. Localizar e manipular canais calcificados é um desafio pois a ...

  19. The complex radicular groove: interdisciplinary management with mineral trioxide aggregate and bone substitute.

    Science.gov (United States)

    Narmatha, V J; Thakur, Sophia; Shetty, Sheetal; Bali, Praveen Kumar

    2014-11-01

    This article is a case report of the successful interdisciplinary management of a maxillary lateral incisor with a deep palatogingival groove. The tooth presented with severe periodontal destruction owing to the deep extension of the groove up to the root apex. The groove was meticulously diagnosed and treated by endodontic and subsequent periodontal surgery leading to complete resolution of the pathological process.

  20. EFEITO DA ÉPOCA DE PODA DO SISTEMA RADICULAR NO CRESCIMENTO DE MUDAS DE ALGAROBEIRA

    Directory of Open Access Journals (Sweden)

    Georgiana L. F. M. Souza

    2006-01-01

    Full Text Available The aim of the present work was to evaluate the effect of different pruning time of Prosopis juliflora (Sw DC root system on seedlings growth. The experiment was carried out in the nursery of ESAM, Mossoró-RN. The prunings were carried out at 30, 40, 50, 60 and 70 days after germination. The completely randomized block experimental design was used, with four replications and eight plants per plot. Evaluations for shoot height, stem diameter, shoot height/stem diameter ratio, shoot dry matter weight, total dry matter weight and roots percentage were done. Statistical difference was observed only for root percentages, and the best means were obtained for prunings carried out at 50, 60, and 70 days after germination.

  1. An Unusual Site of Adenomatoid Odontogenic Tumor Presenting as Periapical (Radicular Cyst: A Rare Case Report

    Directory of Open Access Journals (Sweden)

    C Anand Kumar

    2010-01-01

    Here we are presenting a rare case report of an unusual site of extrafollicular adenomatoid odontogenic tumor in the mandible w.r.t 32, 33, 34 and 35 mimicking periapical disease clinical and radiographically. However, diagnosis of adenomatoid odontogenic tumor should be considered when the clinician is presented with a corticated radiolucency in the anterior lower jaw, especially in teens and young adults.

  2. Apical microinfiltration evaluation of radicular channels irradiated with Er:YAG laser in vitro

    International Nuclear Information System (INIS)

    Sebrao, Catia Cilene Nass

    2003-01-01

    It was evaluated, in vitro, the adaptation of the filling material (Sealer 2S R ) to the root channels dentine walls treated using the endodontic technique and prepared with the Er:YAG laser, by the technique of infiltration of methylene blue dye. Using scanning electronic microscopy, the morphologic alteration of the root channel dentine was observed for one sample per studied group. Also, an evaluation of the temperature increase in the external surface of the root during the irradiations was performed for two samples per group. For each group of samples, with eleven roots each, two sub-groups had been considered: the dry, irradiated after completely dry with absorbent cones of paper, and the humid, where a cone of absorbent paper was applied for two seconds in the root canal, leaving them lightly humidified. Considering the used energies for the irradiations, the groups are: G1, control (without irradiation), G2-dry (100 mJ-10 Hz), G2-humid (100 mJ-10 Hz), G3-dry (140 mJ-6 Hz), G3-humid (140 mJ-6 Hz), G4-dry (180 mJ-6 Hz), and G4-humid (180 mJ-6 Hz). The results had shown that apical microinfiltration did not exhibit significant difference among groups. The highest increase in temperature was observed for the dry groups, with the maximum variation of temperature of 6.5 deg C. Under the scanning electronic microscopy analysis, the humid groups had presented cleaner surfaces than the dry groups. The G4-humid group presented extensive regions of fusion and resolidification of the dentine. (author)

  3. Corono-radicular biological restoration of maxillary central incisors by direct method.

    Science.gov (United States)

    Aggarwal, Sonia; Sahoo, Sujit Ranjan; Pandharkar, Kartik

    2014-11-01

    This case report refers to the esthetic and functional restorations of extensively damaged maxillary central incisors with dental caries in a 32-year-old woman, with the use of posts and crowns made from natural extracted teeth. Proper restoration of such teeth with the use of natural teeth fragments are known as "biological restoration." Biological restorations can be done by using the fragments of the patients own tooth and if that is not available, tooth fragment can be obtained from an extracted tooth. These biological posts and crowns present a low cost option and an alternative technique for the morphofunctional recovery of extensively damaged teeth. There are limitations with the use of natural extracted teeth (homogenous bonding) for restoration such as the difficulty of finding teeth with a similar color and shape as that of the destroyed element, or patient may refuse to accept a tooth fragment from another patient, which prevents execution of the restoration.

  4. Developmental Changes In Pain And Spinal Immune Gene Expression After Radicular Trauma In The Rat

    Directory of Open Access Journals (Sweden)

    Gordon Alfred Barr

    2016-12-01

    Full Text Available Neuropathic pain is an example of chronic pain that develops after nerve injury and is less frequent in infants and children than in adults. Likewise, in animal models of neuropathic pain, allodynia and hyperalgesia are non-existent or attenuated in the infant, with a switch during development by which acute nerve injury transitions to chronic pain. Concomitant with the delay in neuropathic pain, there is a parallel delay in the ability of nerve injury to activate the immune system. Models of neuropathic pain in the infant have used various ligation methods and find that neuropathic pain does not occur under after postnatal day 21-28 (PN21-PN28, linked to activation of immune processes and developmental regulation of anti-inflammatory cytokines. We applied a model of neuropathic pain in the adult using a transient compression of the cervical nerve or nerve root in infant rats (injured at 10, 14, 21 or 28 days of age to define transition periods during which injury results in no change in thermal and mechanical pain sensitivity or in short term changes in pain. There was little to no hyperalgesia when the injury was imposed at PN10, but significant thermal hyperalgesia and mechanical allodynia one day after compression injury when performed at PN14, 21 or 28. Thermal withdrawal latencies return to near baseline by 7 days post-surgery (PS7 when the injuries were at PN14, and lasted up to 14 days when imposed at PN28. There was mechanical allodynia following nerve injury at 7 or 14 days after injury at PN14. Measurements of mRNA from spinal cord at 1, 7 and 14 days post-injury at PN14, 21, and 28 showed that both the magnitude and duration of elevated immune markers and chemokines/cytokines were greater in the older animals, corresponding to the development of hyperalgesia. Thus we confirm the late onset of neuropathic pain but found no evidence of emergent hyperalgesia if the injury was before PN21/28. This may be due to the use of a transient, and not sustained, compression compared to that of ligation models.

  5. Evaluation of two protocols for low-level laser application in patients submitted to orthodontic treatment

    Directory of Open Access Journals (Sweden)

    Mariana Marquezan

    2013-02-01

    ção e a data de eutanásia (3º ou 8º dia de experimento. Ao final dos períodos experimentais, foram realizadas mensurações da movimentação dentária, análise qualitativa das reações celulares e teciduais do periodonto e contagem de vasos sanguíneos no ligamento periodontal. RESULTADOS: a quantidade de movimentação não diferiu entre os grupos num mesmo tempo experimental (p < 0,05. A análise qualitativa revelou maior atividade absortiva nos grupos irradiados ao final de 7 dias, especialmente quando as irradiações foram diárias. Nos grupos irradiados diariamente, a contagem de vasos foi aumentada em relação aos animais isentos de dispositivo ortodôntico e de aplicações de LBP (p < 0,05. CONCLUSÃO: apesar de verificada angiogênese em certos grupos irradiados, os protocolos de irradiação testados não foram capazes de acelerar a movimentação dentária, e foi possível verificarem-se absorções radiculares.

  6. Availability of iron in grains common beans (Phaseolus vulgaris l.) irradiated;Disponibilidade de ferro em graos de feijao comum (Phaseolus vulgaris L.) irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Brigide, Priscila

    2002-07-01

    Common bean is the legume more consuming in Brazil, however, the average income of the farming in Brazil is low must the infestation of the grains, to fight these losses the irradiation process is an alternative healthful if compared the chemical handling. The objective of this research was evaluate the iron availability in irradiated raw and cooked beans (doses of 0, 2, 6 and 10 kGy). It was carried through the centesimal composition, anti nutritional factors (tannins and phytate) and iron dialyses for the method 'in vitro'. Cooking diminished the mainly components of the composition with exception of available carbohydrates, the protein content of 27.4 and 23.9; fat 1.2 and 1.1; fibre 23.7 and 18.6, carbohydrates 43.3 and 52.5; respectively for raw grains and cooked. It also had reduction in the amount of tannin which if correlated reversely with the applied doses, with exception of the dose of 2 kGy, varying of 1.56 (10 kGy) to 2.49 (2 kGy) to the for raw grains and traces (10 kGy) to 0.103 (2 kGy ) for grains cooked. The phytate varied of 4.63 (2 kGy) to 8.28 (0 kGy) and 5.29 (6 kGy) to the 9.55 (0 kGy), respectively for raw grains and cooked. In relation to the dialysed iron, the content varied of 1.16 (0 kGy) to 2.39 (6 kGy) and 5.33 (0 kGy) to the 8.02 (6 kGy), respectively for raw grains and cooked The dose of 6 kGy showed positive effect availability such as raw as cooked grain, it being recommended for the utilization. (author)

  7. Analysis of peanuts and soya irradiated: is it possible to identify them?; Amendoim e soja irradiados: e possivel identifica-los?

    Energy Technology Data Exchange (ETDEWEB)

    Leal, Alexandre S. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil)]. E-mail: asleal@cdtn.br; Vieira, Ionara F.R.; Tambourgi, Elias B. [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Quimica]. E-mail: elias@desq.feq.unicamp.br; ionarafernanda@terra.com.br; Krambrock, Klaus [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Fisica]. E-mail: klaus@fisica.ufmg.br; Prado, Guilherme [ Fundacao Ezequiel Dias (FUNED), Belo Horizonte, MG (Brazil). Div. de Vigilancia Sanitaria]. E-mail: gui@funed.mg.gov.br

    2005-07-01

    In this work we present the results of the electronic paramagnetic resonance (EPR) analysis of peanuts and soya treated by gamma-irradiation. The dose employed varying from 1 to 30 kGy. The results obtained confirm that the EPR method is efficient to detect if the products were irradiated. In general, the EPR signal intensity increases according to the dose until saturation is reached making it possible to determine the dose level. (author)

  8. Color formation on irradiated polymethyl methacrylate by electrons beam; Formacao de cor no polimetil metacrilato (PMMA) irradiado com feixes de eletrons

    Energy Technology Data Exchange (ETDEWEB)

    Nardi, Daniela T.; Guedes, Selma M.L. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)]. E-mail: smguedes@ipen.br

    2005-07-01

    The color formation on national and commercial polymethyl methacrylate (PMMA) irradiated by electrons beam was investigated in function of dose (0-150 kGy), post-irradiation time (0-31 days) and heating (110 deg C/1 h) by colorimetry (CIELab), electron spectroscopy resonance (RPE) and photoacoustic infrared spectroscopy (FTIRPAS). The irradiation promoted the formation of unstable color centers responsible by changing of colorimetric and optical properties. Visually or by colorimetric parameters the radiation became the PMMAS yellow and darkening which intensified by increase the dose and disappeared after the post-irradiation time. The yellow color disappeared and darkening increased when the irradiated PMMA (150 kGy) was heated. It was impossible to see the green and red colors however the colorimetric parameters showed a little decreasing of the Da value in function of the increased dose and a little increasing in function of post-irradiation time. The FTIR-PAS spectra did not show the presence of different functional groups after irradiation however the correlation among the Db values and RPE spectra suggested that the radicals could be responsible by unstable and yellow color centers. The radiosterilized PMMA (25 kGy) showed significant colorimetric changes that decreased but continued visible yet after 31 days. (author)

  9. Chemical variations observed in irradiated, treated with IPC and control potato tubers; Variaciones quimica observadas en tuberculos de patata irradiados, tratados con IPC y testigo

    Energy Technology Data Exchange (ETDEWEB)

    Mazon Matanzo, M P; Fernandez Gonzalez, J

    1976-07-01

    The content in soluble sugars, ascorbic acid and phenolic acids of potato tubers preserved by irradiation and IPC, during storage period of five months are studied. In the irradiated tubers, soluble sugars increased immediately after the irradiation, in relation to the control tubers reaching inferior values to those reached by the control tubers, at the end of the storage period. The content in ascorbic acid is generally kept higher in the irradiated and IPC treated tubers than in the control tubers and the content in phenolic acids increased in the irradiated and IPC treated tubers by immediate effect of this treatment. (Author) 39 refs.

  10. Detection and thermoluminescence of coriander (Coriandrum sativum L.) irradiated with {sup 60}Co; Deteccion y termoluminiscencia del cilantro (Coriandrum sativum L.) irradiado con {sup 60}Co

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz G, B. [Departamento de Agricultura y Ganaderia, Universidad de Sonora, 083190 Hermosillo, Sonora (Mexico); Cruz Z, E. [Unidad de Irradiacion y Seguridad Radiologica, Instituto de Ciencias Nucleares, UNAM, A. P. 70-543, 04510 Mexico D. F. (Mexico); Barboza F, M. [Centro de Investigacion en Fisica, Universidad de Sonora, A. P. 5-088, 083190 Hermosillo, Sonora (Mexico)

    2009-10-15

    The fresh and dried coriander (Coriandrum sativum L.) is a spice of high commercial value as food for consumption in Mexico. Their hygienic quality is often poor due to some factors: contaminants present in irrigation water and the cultivation atmosphere, harvesting and post harvest handling, mainly. The process by radiation is an alternative to achieve the sterilization to adequate dose for the hygienic quality for its consumption. However, irradiation also involves food detection exposed to radiation. This paper presents detected results on the dried coriander that was obtained from fresh samples and thermoluminescent properties such as glow curves structure from low doses (0.5 Gy) to high (15 kGy), the dose response, thermoluminescent signal decay, in order to determine the loss of stability during the storage of the poly mineral fraction. We obtained the inorganic fraction separation of the organic part of particle sizes of 10 {mu}m by the Zimmerman method. The samples were exposed at two dose ranges; 0.5-400 Gy and 0.5-15 kGy of gamma radiation with {sup 60}Co. The limit of thermoluminescent detection of the irradiated coriander samples was from 1 Gy. The glow curves were at a broad band of 35-400 C, with a maximum thermoluminescence around 182-196 C, and run at 164 C for high doses of 15 kGy. The range of linear response to dose was 4-25 Gy, whereas higher doses than the kGy order the response increase with the dose. The thermoluminescent properties of the coriander poly mineral fraction, show it can be used to identify irradiated food at gamma doses relatively low and even in doses of commercial interest due to the high stability of thermoluminescent signals. (Author)

  11. Characterization and heading of irradiated fuels and their chemical analogs; Caracterizacion y lixiviacion de combustibles nucleares irradiados y de sus analogos quimicos

    Energy Technology Data Exchange (ETDEWEB)

    Serrano, J A [Ciemat.Madrid (Spain)

    2000-07-01

    This work presents results of leaching experiments under deionized water and under synthetic granite at room temperature in air using spent fuel (UO{sub 2} and MOX LWR fuels) and the chemical analogues, natural UO{sub 2} and SIMFUEL. The experimental conditions and procedure for irradiated and non-irradiated materials were kept similar as much as possible. Also dissolution behaviour studies of preoxidised LWR UO{sub 2} and MOX spent fuel up to different on the oxidation degree. For both fuel types, UO{sub 2} and MOX, the fission products considered showed a fractional release normalised to uranium higher than 1, due to either the larger inventory at preferential leaching zones, such as, grain boundaries or to the inherent higher solubility of some of these elements. In contrast to fission products, the fractional release of PU from the UO{sub 2} fuel was not affected by the oxidation level. Finally a thermodynamic study of the experimental leaching results obtained in this work was performed. (Author)

  12. 2. National Seminar on Acceptance and Trade of Irradiated Foods. Proceedings; 2. Seminario Nacional Aceptacion y Comercio de Alimentos Irradiados. Memorias

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-31

    This proceedings is a compilation of 18 papers presented at the National Seminar on Acceptance and Trade of Irradiated Food, held in Toluca, Mexico, 27-29 October 1997. It generally deals with international and national legal, technological, health and commercial aspects of food irradiation. Public confidence and consumer acceptance of irradiated food stuff is also the subject of the seminar

  13. Implantation of individual temporary warehouse (ATI) CN irradiated fuel Asco; Implantacion del Almacen Temporal Individualizado (ATI) de combustible irradiado de CN Asco

    Energy Technology Data Exchange (ETDEWEB)

    Estrampes, J.

    2014-07-01

    The operation of the two units of Asco NPP produces the filling of the available positions of the Spent Fuel. Nowadays, the situation in terms of occupation is about 90% then the ATI becomes more than necessary to continue the operation of the next cycles white the Centralized Storage (State level being not available. This article describes the process since the design to construction of the ATI at Asco Nuclear Power Plant and describes the most important criteria to classify the fuel and the inserts as approved contents in order to be loaded into the storage containers prior to be sent to the future ATC. (Author)

  14. Hazard analysis and critical control point to irradiated food in Brazil; Analise de perigos e pontos criticos de controle para alimentos irradiados no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Boaratti, Maria de Fatima Guerra

    2004-07-01

    Food borne diseases, in particular gastro-intestinal infections, represent a very large group of pathologies with a strong negative impact on the health of the population because of their widespread nature. Little consideration is given to such conditions due to the fact that their symptoms are often moderate and self-limiting. This has led to a general underestimation of their importance, and consequently to incorrect practices during the preparation and preservation of food, resulting in the frequent occurrence of outbreaks involving groups of varying numbers of consumers. Despite substantial efforts in the avoidance of contamination, an upward trend in the number of outbreaks of food borne illnesses caused by non-spore forming pathogenic bacteria are reported in many countries. Good hygienic practices can reduce the level of contamination but the most important pathogens cannot presently be eliminated from most farms, nor is it possible to eliminate them by primary processing, particularly from those foods which are sold raw. Several decontamination methods exist but the most versatile treatment among them is the ionizing radiation procedure. HACCP (Hazard Analysis and Critical Control Point) is a management system in which food safety is addressed through the analysis and control of biological, chemical, and physical hazards from raw material production, procurement and handling, to manufacturing, distribution and consumption of the finished product. For successful implementation of a HACCP plan, management must be strongly committed to the HACCP concept. A firm commitment to HACCP by top management provides company employees with a sense of the importance of producing safe food. At the same time, it has to be always emphasized that, like other intervention strategies, irradiation must be applied as part of a total sanitation program. The benefits of irradiation should never be considered as an excuse for poor quality or for poor handling and storage conditions, i.e.. as a substitute for good manufacturing practices. By adopting an HACCP based approach to food safety management, it can be clearly demonstrated that the application of a technology like food irradiation is essential for ensuring the safety of raw food stuffs. Such an intervention should be considered as a CCP (Critical Control Point) in the food chain. Therefore, the potential benefit of irradiation, which is endorsed by national and international bodies surely merits serious consideration by public health authorities, industry and consumer groups worldwide. For such, a system of HACCP and the irradiation is primordial so that the alimentary .safety is maintained processes if they are applied correctly. (author)

  15. 2. National Seminar on Acceptance and Trade of Irradiated Foods. Proceedings; 2. Seminario Nacional Aceptacion y Comercio de Alimentos Irradiados. Memorias

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-12-31

    This proceedings is a compilation of 18 papers presented at the National Seminar on Acceptance and Trade of Irradiated Food, held in Toluca, Mexico, 27-29 October 1997. It generally deals with international and national legal, technological, health and commercial aspects of food irradiation. Public confidence and consumer acceptance of irradiated food stuff is also the subject of the seminar

  16. Differential calorimeter and temperature controller for stored energy measurements in irradiated alkali halides; Calorimetro diferencial y controlador de temperatura para medidas de energia almacenada en haluros alcalinos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Delgado Martinez, L

    1977-07-01

    The design and performance of a simple temperature-controlled differential calorimeter are presented. This system allows to measure radiation-induced stored energy in insulators, above room temperature with a differential thermal analysis method. With platelets of KC1 single crystals, the base lines obtained for T{sub 2} T{sub 1} (with T{sub 2}: irradiated sample temperature and T{sub 1}: reference sample temperature) show a smooth drift less of 0,2 degree centigree in the interval from 25 to 400 degree centigree. The discrepancy between two consecutive base lines is less than {+-} 0,02 degree centigree which implies a calorimeter sensitivity of about {+-}0,004 cal/g. This sensitivity allows to measure stored energy release in samples with a color center concentration low enough to be directly measured with a spectrophotometer so that a search for correlations among the features of the stored energy spectrum and the color center annealing can be made. (Author) 13 refs.

  17. Research into aroma changes in irradiated foodstuffs. I.- Studies on Fish; Investigacion de Alteraciones de Aroma en alimentos irradiados. I Estudio sobre Pescado

    Energy Technology Data Exchange (ETDEWEB)

    Barreiro Pinero, R; Gasco Sanchez, L; Valverde Garcia, F

    1972-07-01

    Radiolytic formation of volatile compounds have been investigated in fillets of hake, codfish and bonito gamma-irradiated at a dose range of 0.1-5 Mrads. Analytical methods have been developed by gas chromatography of functional group derivatives: carbonyls as 2,4,-dinitrophenyl hydrazones, primary and secondary amines as N-alkyl benzamides, and thiols as 2,4-dinitrophenyl alkyl thioethers. The main results are as follows: increasing with the integral dose of the whole carbonyls, the most significant components being acetaldehyde, propional dehyde and formaldehyde; no significant variations with the integral dose od the traces of ammonia, methylamine, trimethylamine, ethylamine, diethylamine, propylamine, butylamine and pentylamine found in unirradiated samples; and radiolytic formation of methanethiol and dimethyl disulfide. (Author) 98 refs.

  18. Evolution of biochemical parameters in irradiated fishes: Serum proteins and intestinal nucleic acids; Evolucion de parametros bioquimicos en peces irradiados: Proteinas en suero y acidos nucleicos en intestino

    Energy Technology Data Exchange (ETDEWEB)

    Garces, F; Andres, P; Davila, C A

    1976-07-01

    In sublethal gamma-irradiated C. auratus, a sudden decrease of total serum protein concentration and a preferential descent of the low molecular weight gamma-globulin fraction have been observed. These effects are transient and after different latent periods dependent on doses, normal values are recovered, A temporal failure of a vascular permeability regulation system is probably implied. The DMA depolymerization. observed in the intestine indicates the action of radio-induced DNA degradation mechanisms since this effect is independent on doses. (Author) 29 refs.

  19. Flow cytometric analysis of p21 protein expression on irradiated human lymphocytes; Analise por citometria de fluxo da expressao da proteina p21 em linfocitos humanos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Santos, N.F.G.; Amaral, A., E-mail: neyliane@gmail.com [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Departamento de Energia Nuclear. Laboratorio de Modelagem e Biodosimetria Aplicada; Freitas-Silva, R. [Universidade Federal de Pernambuco (UFPE), Garanhuns, PE (Brazil). Departamento de Ciencias Naturais e Exatas; Pereira, V.R.A. [Fundacao Oswaldo Cruz (FIOCRUZ), Recife, PE (Brazil). Centro de Pesquisas Aggeu Magalhaes. Departamento de Imunologia. Lab. de Imunoparasitologia; Tasat, D.R. [Universidad Nacional de General San Martin, Buenos Aires (Argentina). Escuela de Ciencia y Tecnologia. Laboratorio de Biologia Celular del Pulmon

    2013-08-15

    Cell cycle blockage in G1 is a mechanism p21 protein-regulated and coupled to DNA damage response to permit genetic content analysis, damage repair and cell death. Analysis of proteins that participates of this response has progressed with new analytic tools, and data contributes to comprehension of radioinduced molecular events as well as to new approaches on practices that employ ionizing radiation. On this perspective, the aim of this research was to evaluate, by flow cytometry, p21 expression on irradiated human lymphocytes, maintained under different experimental conditions. Peripheral blood samples from 10 healthy subjects were irradiated with doses of 0 (non-irradiated), 1, 2 and 4 Gy. Lymphocytes were processed to analysis on ex vivo (no cultured) condition and after 24; 48 and 72 hours culture, with and without phytohemagglutinin stimulation. p21 protein expression levels were measured by flow cytometry, as percentage values. Results indicate that flow cytometric assay allows detection of changes on p21 expression, since it was detected significant increase on phytohemagglutinin-stimulated samples, for all times, against basal expression (ex vivo). However, it was not observed significant alterations on p21 protein radioinduced levels, for all doses, times and culture conditions analyzed. These results not indicate so p21 protein as bioindicator of ionizing radiation exposure. Nevertheless, data confirmation may to require analysis of a more numerous population. (author)

  20. Biochemical and immunological alterations of {sup 60} Co irradiated Bothrops jararacussu venom; Alteracoes bioquimicas e imunologicas do veneno de Bothrops jararacussu irradiado com {sup 60} Co

    Energy Technology Data Exchange (ETDEWEB)

    Spencer, Patrick J.

    1995-12-31

    Proteins irradiation leads to structural alterations resulting in activity and function loss. This process has been useful to detoxify animal venoms and toxins, resulting in low toxicity products which increased immunogenicity. The Bothrops jararacussu venom behaves as a weak immunogen and its lethal activity in not neutralized by either autologous, heterologous or bothropic polyvalent antisera. This venom is markedly myotoxic and and the commercial bothropic antiserum does not neutralize this activity, because of this low immunogenicity of the myotoxins. This present work was done in order to evaluate the possibility of irradiating Bothrops jararacussu, intending to increase the immunogenicity of the myotoxic components, leading to productions of myotoxins neutralizing antibodies. Bothrops jararacussu venom samples were irradiated with 500, 1000 and 2000 Gy of {sup 60} Co gamma rays. A 2.3 folds decrease of toxicity was observed for the 1000 Gy irradiated samples while the 2000 Gy irradiated sample was at least 3.7 folds attenuated. On the other hand, the 500 Gy did not promote any detoxification. Electrophoresis and HPLC data indicate that the irradiation lead to the formation of high molecular weight products (aggregates). The proteolytic and phospholipasic activities decreased in a dose dependent manner, the phospholipases being more resistant than the proteases. Both the animals (rabbit) immunized with either native or 2000 Gy irradiated venom produced native venom binding antibodies, a slightly higher titer being obtained in the serum of the rabbit immunized with the irradiated samples. Western blot data indicate that the anti-irradiated venom Ig Gs recognised a greater amount of either autologous or heterologous venom bands, both sera behaving as genus specific. The anti-native serum did not neutralize the myotoxic activity of native venom, while the anti-irradiated one was able to neutralize this activity. (author). 56 refs., 7 figs.

  1. Gamma ray irradiated goat milk: comparative sensorial analysis with pasteurized goat milk; Leite de cabra irradiado com raios gama: analise sensorial comparativa com o leite de cabra pasteurizado

    Energy Technology Data Exchange (ETDEWEB)

    Gurgel, Maria Sylvia de C.C. do Amaral; Domarco, Rachel E.; Spoto, Marta H.F. [Centro de Energia Nuclear na Agricultura (CENA), Piracicaba, SP (Brazil). Lab. de Irradiacao de Alimentos

    2002-07-01

    Goat milk consumption has increased in the last years, due to its better digestibility and for constituting a good alternative to cow milk for intolerant people. Brazil has over 10 millions goats, mainly in the Northeast area. Considering that it is very important to increase the shelf-life for this product, this work was done to test the gamma-radiation as a preservation method, evaluating acceptability by sensorial analysis compared with pasteurized milk. The goat milk was bought in the Animal Production Department/ESALQ/USP, Piracicaba, and irradiated with 3,5 kGy in the Food Irradiation Laboratory/CENA/USP, using a cobalt-60 irradiator, type Gammabeam-650, from Nordion, Canada. After irradiation, the samples were maintained under refrigeration at 5 deg C and submitted to sensorial analysis at 1{sup st}, 7{sup th} and 15{sup th} days by 30 untrained tasters. The results indicated, by Tukey test, a significant preference for the pasteurized milk in comparison to the irradiated one, because a hard caprine flavor was developed by the irradiation. (author)

  2. Chemometric techniques on evaluation of the flavor of irradiated orange juice concentrate; Tecnicas quimiometricas na avaliacao do sabor de aroma do suco de laranja concentrado e irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Spoto, Marta Helena Fillet

    1994-12-31

    The effects of storage temperature and time on can orange juice concentrated were studied for samples irradiated at 2.5, 5.0 and 7.5 kGy doses from a gamma-ray source as well as for untreated samples. All samples were stored at 0{sup 0} C, 5{sup 0} C and 25{sup 0} C for periods of 1, 30, 60 and 90 days. The concentrated orange juice was subjected to sensorial evaluations and gas chromatographic analysis. The free profile technique was applied using eight trained panel applying the Quantitative Descriptive Analyses, using a 10 cm unstructured category scale for each attribute. Samples stored for more than one day showed a diminution in the orange attribute rating and correspondent increases in ratings for the bitterness, medicinal and cooked attributes. Storage at 0{sup 0} C and 5{sup 0} C showed smaller effects on the sweetness ratings as well as on the oily, acidic and medicinal flavor characteristics. In most cases increased radiation levels were accompanied by lower intensity of orange attribute values and higher intensity of bitter, medicinal and cooked attributes. Forty three chemical compounds were characterized. Mircene, octanal, {delta}-3-carene, limonene, citronelal, and neral were highly correlated and statistically significant correlation coefficients. All these components showed low, but 95% confidence significant level correlations with the orange attribute. On the other hand the correlated group of hexanal, octanol, oxidation products, terpinene-4-ol, cis-carveol, nerol, carvona, geraniol, perilyl alcohol and cariophilene substances can be associated the bitter, medicinal and cooked attributes of the irradiated orange juice concentrate. (author). 83 refs., 7 figs., 12 tabs.

  3. CRESCIMENTO RADICULAR DE MUDAS DE COUVE-FLOR PRODUZIDAS EM DIFERENTES SUBSTRATOS DE PRODUÇÃO AGROECOLOGICA

    Directory of Open Access Journals (Sweden)

    Julio Cesar Gradice Saluci

    2017-05-01

    Full Text Available Este trabalho teve como objetivo avaliar o desempenho de mudas de couve flor, semeadas em diferentes substratos: e concentrações  orgânicas formuladas a partir de matéria prima disponível na região. O estudo foi desenhado no delineamento inteiramente casualizado com sete repetições considerando uma planta por repetição, em esquema fatorial 4x4, quatro substratos e quatro concentrações os tratamentos foram quatro tipos de substratos sendo um comercial comumente utilizado para produção de mudas de hortaliças e três orgânicos de produção agroecológica, ambos produzidos no setor de agroecologia do ifes-campus de alegre, sendo: S1- Composto orgânico produzido pelo processo de compostagem de restos de poda de jardim e esterco bovina fresco, de acordo com a metodologia de (SOUZA et al., 2013; S2- Vermicomposto produzido com o composto orgânico no qual foi inserido minhocas Eisenia foetida para realizar o processo de vermicompostagem e S3 - Composto orgânico  com cinzas de madeira + restos de poda de jardins + esterco bovino, compostado em sistemas de pilhas. As concentrações foram 25, 50, 75 e 100% de substrato completados com volumoso de terra de barranco característica de horizonte c, completados em volumes. Os substratos  orgânicos apresentaram bons desenvolvimento de raiz para as mudas de couve flor.

  4. Morphological alterations of radicular dentine pretreated with different irrigating solutions and irradiated with 980-nm diode laser.

    Science.gov (United States)

    Alfredo, Edson; Souza-Gabriel, Aline E; Silva, Silvio Rocha C; Sousa-Neto, Manoel D; Brugnera-Junior, Aldo; Silva-Sousa, Yara T C

    2009-01-01

    The topographical features of intraradicular dentine pretreated with sodium hypochlorite (NaOCl) or ethylenediamine tetraacetic acid (EDTA) followed by diode laser irradiation have not yet been determined. To evaluate the alterations of dentine irradiated with 980-nm diode laser at different parameters after the surface treatment with NaOCl and EDTA. Roots of 60 canines were biomechanically prepared and irrigated with NaOCl or EDTA. Groups were divided according to the laser parameters: 1.5 W/CW; 1.5 W/100 Hz; 3.0 W/CW; 3.0 W/100 Hz and no irradiation (control). The roots were splited longitudinally and analyzed by scanning electron microscopy (SEM) in a quali-quatitative way. The scores were submitted to two-way Kruskal-Wallis and Dunn's tests. The statistical analysis demonstrated that the specimens treated only with NaOCl or EDTA (control groups) were statistically different (P laser-irradiated specimens, regardless of the parameter setting. The specimens treated with NaOCl showed a laser-modified surface with smear layer, fissures, and no visible tubules. Those treated with EDTA and irradiated by laser presented absence of smear layer, tubules partially exposed and melting areas. The tested parameters of 980-nm diode laser promoted similar alterations on dentine morphology, dependent to the type of surface pretreatment. Copyright 2008 Wiley-Liss, Inc.

  5. Síndrome de compressão radicular por protusão do ligamento amarelo

    Directory of Open Access Journals (Sweden)

    Orlando Sattamini-Duarte

    1953-06-01

    Full Text Available O autor apresenta um caso de protrusão de ligamento amarelo, ao nível de L4, que se mostrava espessado. O paciente exibia sintomatologia clínica idêntica à da hérnia discal, com déficit motor e perturbações sensitivas localizadas. A hemilaminectomia curou o doente de suas manifestações dolorosas e sensitivas; hipotonia muscular muito diminuída quatro meses após a operação.

  6. [Clinical experience in osteoplastic material Allomatrix-implant and fibrin rich platelets use in surgical treatment of jaw radicular cysts].

    Science.gov (United States)

    Kuz'minykh, I A

    2009-01-01

    Bones forming optimizators applying in surgical dentistry is an important element of jaw destructive processes successful treatment. Today use of osteoplastic materials on the collagen basis is widely spread. One of this challenge solution is FRP and Allomatrix-implant material applying to jaws during surgery operations. We described clinical investigation phase: the estimation of postoperative and remote results of treatment was carried out.

  7. Genotoxicity test of Maytenus rigida and Aristolochia birostris in the radicular meristem of the onion, Allium cepa

    Directory of Open Access Journals (Sweden)

    Sandra S. Mendes

    2011-09-01

    Full Text Available Medicinal plants are an important source of treatment for many ailments, although little is known of the potential genotoxic effects of most species. In the present study, two species from diverse and medicinally important genera - Maytenus rigida Mart., Celastraceae, and Aristolochia birostris Ducht, Aristolochiaceae - were analyzed to identify potentially significant secondary metabolites and the possible effects of their aqueous and alcoholic extracts on cell division in the onion root stem (genotoxicity test. The phytochemical testing revealed the presence of a number of potentially important secondary compounds in both species, including phenols, flavonoids, triterpenoids, steroids, and saponins. In the genotoxicity tests, no chromosomal abnormalities of any kind were observed in either species. In the case of M. rigida, a significant increase in mitotic activity was observed at the highest concentration. No significant tendency was recorded in A. birostris, although a considerable increase in the prophase was observed at all concentrations of the alcoholic extract. The triterpenoid content of both species may be especially important from a medicinal viewpoint, although recent findings on the carcinogenic potential of Aristolochia extracts demands caution in the interpretation of the results, and the need for further research.

  8. Genotoxicity test of Maytenus rigida and Aristolochia birostris in the radicular meristem of the onion, Allium cepa

    Directory of Open Access Journals (Sweden)

    Sandra S. Mendes

    2012-02-01

    Full Text Available Medicinal plants are an important source of treatment for many ailments, although little is known of the potential genotoxic effects of most species. In the present study, two species from diverse and medicinally important genera - Maytenus rigida Mart., Celastraceae, and Aristolochia birostris Ducht, Aristolochiaceae - were analyzed to identify potentially significant secondary metabolites and the possible effects of their aqueous and alcoholic extracts on cell division in the onion root stem (genotoxicity test. The phytochemical testing revealed the presence of a number of potentially important secondary compounds in both species, including phenols, flavonoids, triterpenoids, steroids, and saponins. In the genotoxicity tests, no chromosomal abnormalities of any kind were observed in either species. In the case of M. rigida, a significant increase in mitotic activity was observed at the highest concentration. No significant tendency was recorded in A. birostris, although a considerable increase in the prophase was observed at all concentrations of the alcoholic extract. The triterpenoid content of both species may be especially important from a medicinal viewpoint, although recent findings on the carcinogenic potential of Aristolochia extracts demands caution in the interpretation of the results, and the need for further research.

  9. T-helper cell type 17/regulatory T-cell immunoregulatory balance in human radicular cysts and periapical granulomas.

    Science.gov (United States)

    Marçal, Juliana R B; Samuel, Renata O; Fernandes, Danielle; de Araujo, Marcelo S; Napimoga, Marcelo H; Pereira, Sanivia A L; Clemente-Napimoga, Juliana T; Alves, Polyanna M; Mattar, Rinaldo; Rodrigues, Virmondes; Rodrigues, Denise B R

    2010-06-01

    Cysts and granulomas are chronic periapical lesions mediated by a set of inflammatory mediators that develop to contain a periapical infection. This study analyzed the nature of the inflammatory infiltrate, presence of mast cells, and in situ expression of cytokines (interleukin [IL]-17 and transforming growth factor [TGF]-beta), chemokines (macrophage inflammatory protein [MIP]-1beta and monocyte chemotactic protein [MCP]-1), and nuclear transcription factor (FoxP3) in human periapical granulomas and cysts compared with a control group. Fifty-five lesions (25 periapical cysts, 25 periapical granulomas, and 5 controls) were analyzed. The type of inflammatory infiltrate was evaluated by hematoxylin-eosin staining, and the presence of mast cells was analyzed by toluidine blue staining. Indirect immunohistochemistry was used to evaluate the expression of cytokines, chemokines, and FoxP3. The inflammatory infiltrate mainly consisted of mononuclear cells. In cysts, mononuclear infiltrates were significantly more frequent than mixed (polymorphonuclear/mononuclear) infiltrates (P = .04). Mixed inflammatory infiltrates were significantly more frequent in patients with sinus tract (P = .0001). The number of mast cells was significantly higher in granulomas than in cystic lesions (P = .02). A significant difference in the expression of IL-17 (P = .001) and TGF-beta (P = .003) was observed between cysts and granulomas and the control group. Significantly higher IL-17 levels were also observed in cases of patients with sinus tract (P = .03). We observed that chronic periapical lesions might experience a reagudization process that is correlated with an increased leukocyte infiltration, with the predominance of neutrophils attracted by a chemokine milieu, as well as the increased presence of IL-17. Copyright 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  10. Root activity evaluation in tree crops using isotopic techniques; Evaluacion de la actividad radicular de cultivos arboreos utilizando tecnicas isotopicas

    Energy Technology Data Exchange (ETDEWEB)

    Calvache, Marcelo [Comision Ecuatoriana de Energia Atomica, Quito (Ecuador)

    1992-12-31

    This paper discusses the methdology used to evalute root activity of the crops utilizing the technique of soil injection with solutions marked with isotopes. Some of the experimental data obtained with coffee, citrus and oil palm are also presented. Ovel all, these tree crops present a higher root activity in soil layers close to the surface (0-20 cm) and to a distance from the trunk which varies with age, season and variety. The most important conclusions are: 1. The isotope injection technique using {sup 3}2{sup P}, {sup 1}5{sup N}, or {sup 8}5{sup R}b, allow direct and reliable determination of root activity in these tree crops. 2. Root activity of three crops depends on age of the tree, variety, moisture content of the soil and soil type. 3. Soil moisture is the most influencial factor affecting root activity. This is turn depends on the irrigation method employed. 4. From the practical view point, the best distance from the trunk to apply fertilizer in the one wich has highest root activity closest to the soil surface.

  11. Cytotoxicity evaluation of Diethyltoluamide (DEET) in Perna perna (Linnaeus, 1758) mussels non-irradiated and irradiated with {sup 60}Co gamma radiation; Avaliacao da citotoxicidade do dietiltoluamida (DEET) em mexilhoes Perna perna (Linnaeus, 1758) irradiados e nao irradiados com radiacao gama de {sup 60}Co

    Energy Technology Data Exchange (ETDEWEB)

    Martini, Gisela de Assis

    2013-07-01

    Recent studies have identified the presence of several emerging pollutants in aquatic environments. The occurrence in different environmental matrices has been continuously reported, highlighting the need for toxicity studies. The DEET (N,N-diethyl-meta-toluamide) is the active ingredient used in most insect repellents, and is present in many commercially available formulations. Apart from chemical pollutants, aquatic organisms are subject to exposure of ionizing radiation from natural sources or in the vicinity of nuclear power plants. The present study evaluated the toxicity of DEET in organisms irradiated and non-irradiated with {sup 60}Co gamma radiation, and the effects that radiation causes in lysosomes of hemocytes of Perna perna mussel. For this purpose, assays were performed to identify the acute toxicity of DEET concentration and the dose of gamma radiation able to cause mortality. Subsequently, cytotoxicity assays were carried out to assess the stability of the lysosomal membrane in organisms exposed to ionizing radiation and DEET. According to the results obtained in acute toxicity tests, the concentration of DEET that causes mortality of 50% exposed organisms (LC50) is 114,27 mg L{sup -1}, and the radiation dose that causes mortality (LD50) is 1068 Gy. In the cytotoxicity assays, the concentration of the non-observed effect (NOEC) for irradiated and non-irradiated organisms 0.0001 mg L-1 and observed effect concentration (LOEC) at concentrations above this. The IC25 (72h) for non-irradiated organisms was 0.0003 mg L-1 and IC50 (72h) was 0.0008 mg L{sup -1} for irradiated and non-irradiated organisms. Despite of the concentrations of effect found in this study were higher than in the environment, both measurements are in the same order of magnitude and should be also take into account the possible synergistic effects of DEET with other contaminants in the aquatic environment. (author)

  12. Precisão e confiabilidade de um localizador apical na odontometria de molares inferiores: estudo in vitro = Accuracy and reliability of an apex locator for working length determination of lower molars: an in vitro study

    Directory of Open Access Journals (Sweden)

    Brito-Júnior, Manoel

    2007-01-01

    Full Text Available O presente estudo in vitro teve por objetivo avaliar a precisão e a confibialidade de um modelo de localizador apical eletrônico (LAE na obtenção do comprimento de trabalho (CT em molares inferiores. Após adequado acesso endodôntico e manobras iniciais de exploração em 20 dentes, mediu-se com uma lima K # 10 o comprimento dos condutos mésio-vestibular (MV e distal (D até o forame apical, subtraindo-se 1 mm (CT1, tendo como referências externas as cúspides mésio-vestibular e disto-vestibular, respectivamente. Os dentes foram fixados em recipientes plásticos contendo alginato procedendo-se as medidas eletrônicas com o LAE Novapex (Fórum,Israel. Limas K # 10 foram inseridas nos canais MV e D até que os instrumentos atingissem a marca 0 no visor do aparelho e posteriormente realizava-se o recuo até a marca 1, ajustando-se os cursores nas mesmas referências externas do CT1. As mensurações com o LAE foram realizadas em triplicata, adotando-se a média das medidas, por dois operadores calibrados, um estudante de gradução (CT2 e um especialista em endodontia (CT3. O coeficiente de correlação linear de Pearson revelou alta concorcândia inter–operadores e intraoperadores. Para comparação do CT1, CT2 e CT3 foi aplicado o Teste t de Student para amostras pareadas (p < 0,05, que não mostrou diferenças significativas entre todas as medidas odontométricas para os canais radiculares MV (p = 0,22 e D (p = 0,94. Portanto, o LAE testado mostrou-se preciso e confiável na determinação da odontometria de molares inferiores

  13. Physico chemical and microbiological changes in nopal (Opuntia spp.) irradiated with gamma rays of cobalt 60; Cambios fisicoquimicos y microbiologicos en nopal (Opuntia spp.) irradiado con rayos gamma de cobalto 60

    Energy Technology Data Exchange (ETDEWEB)

    Perez N, M

    2001-07-01

    The objective of this work is to study the physico-chemical and microbiological changes which take place in the nopal (Opuntia spp.) after they have been irradiated and stored at environment and refrigeration temperatures in order to determine the level of irradiation dose more adequate for getting them an increase in the storage life, as well as to determine the physico-chemical changes attributed to the irradiation doses used, comparing the obtained results with those ones of non-irradiated nopal samples, which are considered as control samples. The radiation source used was a GAMMABEAM-651 PT, property of the Nuclear Sciences Institute of UNAM. The nopals studied are of the variety (Milpa Alta, Opuntia ficus) which were cut and packed in polyethylene bags with and without nitrogen. In order to find the adequate dose level it was used a lot of 200 samples which were treated in sets of 10. They were irradiated in doses of 0.5 to 10 kGy at a dose reason of 3.7 kGy/h. The adequate doses for getting an increase in the storage life, where there was not darkness were of 1.5 and 2.0 kGy, allowed doses in the NOM-033-SSA1-1993, it was not found any change in acceptability by flavour, but so in the titled activity values and sugars. The lowest loss of weight was found in the 1.5 kGy dose without nitrogen and the highest in the 2.0 kGy with nitrogen dose. Likewise was determined that with the irradiation treatment in the recommended doses it is diminished the microorganisms growth, obtaining an improvement in the general appearance of the nopals during their storage period. (Author)

  14. Characterization program, management and isotopic inventory calculation, radiological and fuel thermal irradiated in nuclear power Cofrentes; Programa Caracterizacion Gestion y calculo del inventario isotopico, radiologico y termico del combustible irradiado en la Central Nuclear de Cofrentes

    Energy Technology Data Exchange (ETDEWEB)

    Albendea, M.; Diego, J. L. de; Urrea, M.

    2012-07-01

    Characterization is a very detailed and user-friendly program takes into account the history of irradiation individualized and real all the fuel, even taking into account the interim periods are periods of discharge and recharge cycles and which have not been used.

  15. Thermoluminescent dependence with the particle size of polyminerals in food irradiated of Mexican spices; Dependencia Tl con el tamano de particula de poliminerales en alimentos irradiados de especias Mexicanas

    Energy Technology Data Exchange (ETDEWEB)

    Teuffer Z, C. [FQ-UNAM, 04510 Mexico D.F. (Mexico); Cruz Z, E. [ICN-UNAM, A.P. 70-543, 04510 Mexico D.F. (Mexico); Calderon, T. [Depto. de Quimica Agricola-Geologia- Geoquimica, Universidad Autonoma de Madrid, 28049 (Spain); Chernov, V.; Barboza F, M. [CIF, UNISON, A.P. 5-88, Hermosillo, Sonora (Mexico)

    2004-07-01

    The influence of grain size on Tl was analysed in poly minerals extracted from Mexican spices as Origanum vulgare L. (oregano) y Capsicum annun (chile guajillo). The poly minerals size were selected by Zimmerman method up to 10 {mu}m and exposed to 0.5-10 kGy range from {sup 60}Co. The glow curves were centered at 166 C for Capsicum annun and at 126 C for Origanum vulgare l. In both cases was observed at 5 kGy a weak saturation for Tl response. This behaviour is attributed to feldspar and quartz are present in the samples and this results is in agreement with other european spices obtained. For >10 {mu}m particle size the Tl response increased respect to the doses, and it is possible that increase the organic impurities quantities are present in the samples and contributed to the Tl when the samples were thermally excited. The aim of this work is provide more ideas with regard to the behaviour of luminescence emission as dependent of the size particle in the irradiated spices. The methodology might useful for quality control also in radiation processing. (Author)

  16. Biodegradation polyurethane derived from vegetable oil irradiated with gamma rays 25 kGy and 100 kGy; Biodegradacao de poliuretano derivado de oleo vegetal irradiado com raios gama 25 kGy e 100 kGy

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Antonia M. dos, E-mail: amsantos@rc.unesp.br [Universidade Estadual Paulista - Unesp, Rio Claro, SP (Brazil); Claro Neto, Salvador [Universidade de Sao Paulo - USP, Campus de Sao Carlos, SP (Brazil); Azevedo, Elaine C. de [Universidade Federal do Parana, Campus de Curitiba, PR (Brazil)

    2011-07-01

    The environment requires polymers that can be degraded by the action of microorganisms. In this work was studied the biodegradation of polyurethane samples derived from vegetable oil (castor oil), which were irradiated with gamma rays 25 kGy and 100 kGy compared with the same polyurethane without being irradiated. Biodegradation of polyurethane was carried out in culture medium containing the fungus Aspergillus niger by 146 days and the result was evaluated using the technique of thermogravimetric analysis, where there was a change of behavior of the curves TGA / DTG occurred indicating that chemical modifications of molecules present in the structure of the polymer chain, thus confirming that the material has undergone the action of microorganisms. (author)

  17. Chemical and physical analysis on hard tissues after irradiation with short pulse Nd:YAG laser; Alteracoes quimicas e fisicas de tecidos duros irradiados por laser de neodimio chaveado

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Andrea Antunes

    2003-07-01

    This work reports on a study that was designed to investigate chemical, physical and morphological alterations in the dental enamel surface. The influence of application of laser in enamel surface by microscopic technical, X-ray fluorescence for chemical analysis, physical property as well as hardness and thermal analysis with Nd:YAG laser is also pointed out. A prototype of Nd:YAG (Q-switched) laser developed at the Center of Lasers and Applications - Institute of Energetic and Nuclear Research, aiming applications in the Medical Sciences that typical wavelength of 1.064 nm was used. The modifications in human dental enamel chemical composition for major and trace elements are here outlined. The accuracy of procedures was performed by analysis of natural hydroxyapatite as standard reference material. The identification and quantification of the chemical elements presented in the dental tissue samples were performed trough EDS, XRF and INAA. We determined the rate Calcium/Phosphorus (Ca/P) for different techniques. We performed an analysis in different regions of the surface and for different areas allowing a description of the chemical change in the total area of the specimen and the assessment of the compositional homogeneity of the each specimen. A comparison between XRF and INAA is presented. Based on morphological analysis of the irradiated surfaces with short pulse Nd:YAG laser we determined the area surrounded by the irradiation for the parameters for this thesis, and this technique allowed us to visualize the regions of fusion and re-solidification. The energy densities ranged from 10 J/cm{sup 2} to 40 J/cm{sup 2}, with pulse width of 6, 10 e 200 ns, and repetition rates of 5 and 7 Hz. In this thesis, FTIR-spectroscopy is used to analyze powder of mineralized tissue as well as enamel, dentine, root and cementum for human and bovine teeth after irradiation with short-pulse Nd:YAG laser. Characteristic spectra were obtained for the proteins components and mineral compound of dental tissue. We determined the rate between the area of the control and irradiated bands and the results pointed out an enlargement in the area below the curve of the distinct conditions of irradiation. We monitored the raise of temperature caused by irradiation using the T-thermocouple fixed on the pulpar chamber. The result obtained for the highest value of the energy density was inferior to 5 deg C, which indicates that its use is viable without damage on the dental pulp. Based on models already presented in the literature for the heat transfer we performed numeric simulations using the irradiation parameters from this thesis and we simulated the temperature variation in deepness and for different exposition time on the enamel and the dentine. (author)

  18. Development of high performance lubricant through the compatibility of polyalphaolefin, polyurea and irradiated polytetrafluoroethylene; Graxa de poliureia: estudo da compatibilidade da poliureia, polialfaolefina e politetrafluoretileno irradiado para melhoria da lubricidade e estabilidade

    Energy Technology Data Exchange (ETDEWEB)

    Ratao, Natalia Torres

    2013-07-01

    Lubricants are gaseous, liquid, semi solid or solid (powder) materials those form a film between two parties preventing friction. High performance lubricants are designed to work under severe conditions of temperature, pressure, and contamination. The most used are liquids (oils) and semi solids (greases). Greases are applied where oils can drain or in inaccessible places and are divided generally into two classes, soap and no soap. The most used non soap grease is polyurea, obtained by the reaction between amine and isocyanate, has highly thixotropic, high dielectric strength and excellent anticorrosive property, so it is widely used for lubrication of electric motors and shipbuilding machinery. For a grease with high performance, in this study was used a synthetic lubricant fluid, polyalphaolefin, and was also employed solid lubricant additive polytetrafluoroethylene (PTFE) due its lowest coefficient of friction, is found commercially irradiated in air to obtain smaller particles and to produce oxygenated terminal groups those are more compatible with the metal surface. The tests conducted were comparatively between pure polyurea grease and with PTFE additive. The characterizations were made by infrared spectroscopy and elemental analysis of C, N and H and Free NCO index, proving the formation of four carbons polyurea (tetraurea). The functional analysis of drop point and oil separation showed high stability and compatibility between the polymers increased when PTFE was added. The excellent resistance of pure tetraurea grease to wear and extreme pressure were demonstrated by four-ball and practical bearings tests, characterizing this grease as a high performance lubricant, when compared to most used greases in the market. (author)

  19. Radiosensitizing effect of nitric oxide in tumor cells and experimental tumors irradiated with gamma rays and proton beams; Efecto radiosensibilizador del oxido nitrico en celulas tumorales y en tumores experimentales irradiados con radiacion gamma y con haces de protones

    Energy Technology Data Exchange (ETDEWEB)

    Policastro, Lucia L; Duran, Hebe; Molinari, Beatriz L [Comision Nacional de Energia Atomica, General San Martin (Argentina). Dept. de Radiobiologia; Schuff, Juan A; Kreiner, Andres J; Burlon, Alejandro A; Debray, Mario E; Kesque, Jose M; Ozafran, Mabel J; Vazquez, Monica E [Comision Nacional de Energia Atomica, General San Martin (Argentina). Dept. de Fisica; Davidson, Jorge; Davidson, Miguel [Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Buenos Aires (Argentina); Somacal, Hector R; Valda, Alejandro A [Universidad Nacional de General San Martin , Villa Ballester (Argentina). Escuela de Ciencia y Tecnologia

    2003-07-01

    Nitric oxide (NO) has been reported to be a radiosensitizer of mammalian cells under hypoxic conditions. In a previous study, we demonstrated an enhancement in radiation response induced by NO in mouse tumor cells under aerobic conditions, with an increasing effect as a function of malignancy. The aim of the present study was to evaluate the effect of NO in tumor cells and in experimental tumors irradiated with {gamma} rays and proton beams. Irradiations were performed with a {sup 137}Cs {gamma} source and with proton beams generated by the TANDAR accelerator. Tumor cells were treated with the NO donor DETA-NO and the sensitizer enhancement ratio (SER) was calculated using the {alpha} parameter of the survival curve fitted to the linear-quadratic model. Tumor cells irradiated with protons were radio sensitized by DETA-NO only in the more malignant cells irradiated with low LET protons (2.69{+-}0.08 keV/{mu}m). For higher LET protons there were no radiosensitizing effect. For human tumor cells pre-treated with DETA-NO and irradiated with {gamma} rays, a significantly greater effect was demonstrated in the malignant cells (MCF-7) as compared with the near normal cells (HBL-100). Moreover, a significant decrease in tumor growth was demonstrated in mice pre-treated with the NO donor spermine and irradiated with {gamma} rays and low LET protons as compared with mice irradiated without pre-treatment with the NO donor. In conclusion, we demonstrated a differential effect of NO as a radiosensitizer of malignant cells, both with {gamma} rays and low LET protons. This selectivity, coupled to the in vivo inhibition of tumor growth, is of great interest for the potential use of NO releasing agents in radiotherapy. (author)

  20. Prevention and control of sequels in the mouth of patients treated with radiation therapy for head and neck tumors; Prevencao e controle das sequelas bucais em pacientes irradiados por tumores de cabeca e pescoco

    Energy Technology Data Exchange (ETDEWEB)

    Cardoso, Maria de Fatima Aparecida; Novikoff, Silviene; Tresso, Adriana; Segreto, Roberto Araujo [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Setor de Odontologia; Cervantes, Onivaldo [Universidade Federal de Sao Paulo (UNIFESP/EPM), SP (Brazil). Dept. de Medicina. Setor de Radioterapia

    2005-04-01

    Surgery and radiation therapy are de main treatments for head and neck cancer. The side effects of the interaction of ionizing radiation on the tissues include dermatitis, mucositis, xerostomia, candidiasis, dysgeusia, dysphagia, caries, trismus, osteoradionecrosis. Objective: To assess dental condition of the patients using a protocol which allows avoiding or reducing the effects of radiation in the tissues of the oral cavity. Materials And Methods: Dental follow-up was performed before, during and up to 180 days after radiation therapy in 12 patients submitted to surgery and radiation therapy or radiation therapy alone. Results: The proportion of effects such as dermatitis, mucositis, dysgeusia, and dysphagia increased from the second week of the treatment until the end of the administrations. There was a clear decrease at the end of the treatment which was close to baseline values after 180 days. The reduction of xerostomia was slower and less effective. No case of caries, trismus, and osteoradionecrosis were observed during the assessment period. Conclusion: Regular dental follow-up associated with preventive measures such as prophylactic management of dental and oral diseases, adequate hygiene, mouth-washing with bicarbonate water and chamomile tea, and topic fluorine application contributed to improve the recovery conditions of patients with cancer of head and neck submitted to radiation therapy. (author)

  1. Evaluation of irradiated essential oils to control of Sitophilus zeamais Mots. (Coleoptera: Curculionidae) and Blatella germanica (L.) (Dictyopera: Blattellidae); Avaliacao de produtos naturais irradiados para o controle de Sitophilus zeamais Mots. (Coleoptera: Curculionidae) e Blatella germanica (L.) (Dictyopera: Blattellidae)

    Energy Technology Data Exchange (ETDEWEB)

    Potenza, Marcos Roberto

    2004-07-01

    This work aimed to evaluate the effect of irradiated essential oils of Eucalyptus citriodora, Eucalyptus globulus, Pinus sp., Azadirachta indica, Cymbopogon nardus, Cupressus sempervirens, Cymbopogons citratus and Juniperus communis and aqueous, hexanic and ethanolic irradiated extracts of Solanum paniculatum, Dahlia pinnata, Lycopersicon esculentum, Nephrolepis pectinata, Ruta graveolens, Ficus elastica, Lavandula angustifolia, Rhododendron simsii, Agave angustifolia, Ocimum basilicum, Allamanda cathartica, Dieffenbachia brasiliensis, Pennisetum purpureum, Annona squamosa, Coffea arabica and Hibiscus rosa-sinensis, in order to identify new substances to integrated pest management (IPM) and to observe possible effects of gamma radiation about extracts and essential oils efficiency such as increase, reduction, activation and inactivation of the same to the pest control. It evaluated the effect of contact on Sitophilus zeamais and by ingestion in Blattella germanica. To irradiation was used an experimental irradiator of Cobalt-60, type Gammacell 220. The essential oils were submitted increasing doses of gamma radiation: 2.5; 5.0; 7.5 and 10.0 kGy. The bioassay with B. germanica demonstrated efficiency between 22.0 e 30.0% and between 30.0 and 42.0%, respectively, to irradiated essential oils of E. citriodora and E. globulus and they demonstrated too repellency to the nymphs. The gamma radiation used promoted changes in essential oils of E. citriodora e E. globulus that they began to show efficiency on B. germanica nymphs besides a significant reduction of repellency. Essential oils of Pinus sp., A. indica, C. sempervirens and J. communis did not display efficiency. The essential oils of C. nardus, and C. citratus had low efficiency. The gamma radiation increased the efficiency of ethanolic extract of D. Pinnata with dose of 7.5 kGy, showing 48.0% of efficiency on B. germanica nymphs. The gamma radiation showed adverse effect on the aqueous extract of R. Graveolens, decreasing its efficiency of 20.0% to 2.0% in doses of 2.5; 7.5 and 10.0 kGy and 4,0% In dose of 5.0 kGy. The bioassay with S. zeamais demonstrated that irradiated essential oils of E. citriodora, E. globulus e Pinus sp. with dose of 5.0 kGy presented 100.0; 92.0 and 100.0% of efficiency, respectively. The essential oil of A. indica in different doses of gamma radiation didn't display efficiency on S. zeamais adults. It was not found out gamma radiation effects on efficiency from essential oils of C. nardus, C. sempervirens, C. citratus and J. communis, besides the oil of C. nardus in doses of gamma radiation applied was highly efficient over than 90.0%. The gamma radiation increased the efficiency of ethanolic extract of L. esculentum getting 70.0% of efficiency with dose of 5.0 kGy on S. zeamais adults. The gamma radiation showed adverse effect on the aqueous extract of R. Graveolens, decreasing its efficiency of 20.0% to 12.0; 6.0 and 2.0% in doses of 5.0; 7.5 and 10.0 kGy, respectively. According to results we verified that the gamma radiation interfered on behavior of some essential oils to pest control and it can obtain increase, reduction, activation and inactivation from the same. (author)

  2. Thermoluminescence in HfO{sub 2}:Eu{sup 3+} powders irradiated in UV; Termoluminiscencia en polvos de HfO{sub 2}:Eu{sup 3+} irradiados en el UV

    Energy Technology Data Exchange (ETDEWEB)

    Ceron R, P. V. [Universidad de Guanajuato, Division de Ciencias e Ingenierias, Loma del Bosque No. 103, Col. Lomas del Campestre, 37150 Leon, Guanajuato (Mexico); Montes R, E.; Rivera M, T.; Diaz G, J. A. I.; Guzman M, J. [IPN, Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Unidad Legaria, Av. Legaria 694, Col. Irrigacion, 11500 Ciudad de Mexico (Mexico)

    2016-10-15

    Various inorganic compounds synthesized for photo luminescent applications have also presented a thermoluminescent (Tl) response, for example the metal oxides doped with rare earths. This property extends the use of these materials to the radiation dosimetry. For this reason, in this work the Tl response is presented in HfO{sub 2}:Eu{sup 3+} powders synthesized by the hydrothermal path, exposed to ultraviolet (UV) radiation of 254 nm. The kinetic parameters of its brightness curve were also calculated using the Chen expressions and the analysis method based on the shape of the curve. For the powders irradiated for 10 min the highest Tl response corresponds to the sample with 5% of the impurity, which is 6.5 times higher than the signal corresponding to the intrinsic sample. Its bright curve shows a main peak with a maximum in 148 degrees Celsius and a second order kinetics. Another test with the same material shows the Tl response against the exposure time, with a maximum in the 3 minutes. These calculations and tests constitute a first approach for the study of these powders as Tl dosimeter for UV radiation. (Author)

  3. Evaluation of irradiated essential oils to control of Sitophilus zeamais Mots. (Coleoptera: Curculionidae) and Blatella germanica (L.) (Dictyopera: Blattellidae); Avaliacao de produtos naturais irradiados para o controle de Sitophilus zeamais Mots. (Coleoptera: Curculionidae) e Blatella germanica (L.) (Dictyopera: Blattellidae)

    Energy Technology Data Exchange (ETDEWEB)

    Potenza, Marcos Roberto

    2004-07-01

    This work aimed to evaluate the effect of irradiated essential oils of Eucalyptus citriodora, Eucalyptus globulus, Pinus sp., Azadirachta indica, Cymbopogon nardus, Cupressus sempervirens, Cymbopogons citratus and Juniperus communis and aqueous, hexanic and ethanolic irradiated extracts of Solanum paniculatum, Dahlia pinnata, Lycopersicon esculentum, Nephrolepis pectinata, Ruta graveolens, Ficus elastica, Lavandula angustifolia, Rhododendron simsii, Agave angustifolia, Ocimum basilicum, Allamanda cathartica, Dieffenbachia brasiliensis, Pennisetum purpureum, Annona squamosa, Coffea arabica and Hibiscus rosa-sinensis, in order to identify new substances to integrated pest management (IPM) and to observe possible effects of gamma radiation about extracts and essential oils efficiency such as increase, reduction, activation and inactivation of the same to the pest control. It evaluated the effect of contact on Sitophilus zeamais and by ingestion in Blattella germanica. To irradiation was used an experimental irradiator of Cobalt-60, type Gammacell 220. The essential oils were submitted increasing doses of gamma radiation: 2.5; 5.0; 7.5 and 10.0 kGy. The bioassay with B. germanica demonstrated efficiency between 22.0 e 30.0% and between 30.0 and 42.0%, respectively, to irradiated essential oils of E. citriodora and E. globulus and they demonstrated too repellency to the nymphs. The gamma radiation used promoted changes in essential oils of E. citriodora e E. globulus that they began to show efficiency on B. germanica nymphs besides a significant reduction of repellency. Essential oils of Pinus sp., A. indica, C. sempervirens and J. communis did not display efficiency. The essential oils of C. nardus, and C. citratus had low efficiency. The gamma radiation increased the efficiency of ethanolic extract of D. Pinnata with dose of 7.5 kGy, showing 48.0% of efficiency on B. germanica nymphs. The gamma radiation showed adverse effect on the aqueous extract of R. Graveolens, decreasing its efficiency of 20.0% to 2.0% in doses of 2.5; 7.5 and 10.0 kGy and 4,0% In dose of 5.0 kGy. The bioassay with S. zeamais demonstrated that irradiated essential oils of E. citriodora, E. globulus e Pinus sp. with dose of 5.0 kGy presented 100.0; 92.0 and 100.0% of efficiency, respectively. The essential oil of A. indica in different doses of gamma radiation didn't display efficiency on S. zeamais adults. It was not found out gamma radiation effects on efficiency from essential oils of C. nardus, C. sempervirens, C. citratus and J. communis, besides the oil of C. nardus in doses of gamma radiation applied was highly efficient over than 90.0%. The gamma radiation increased the efficiency of ethanolic extract of L. esculentum getting 70.0% of efficiency with dose of 5.0 kGy on S. zeamais adults. The gamma radiation showed adverse effect on the aqueous extract of R. Graveolens, decreasing its efficiency of 20.0% to 12.0; 6.0 and 2.0% in doses of 5.0; 7.5 and 10.0 kGy, respectively. According to results we verified that the gamma radiation interfered on behavior of some essential oils to pest control and it can obtain increase, reduction, activation and inactivation from the same. (author)

  4. Calculation of source term in spent PWR fuel assemblies for dry storage and shipping cask design; Calculo de los terminos fuente de combustibles irradiados PWR para el diseno de contenedores de almacenamiento y transporte

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, J L; Lopez, J

    1986-07-01

    Using the ORIGEN-2 Coda, the decay heat and neutron and photon sources for an irradiated PWR fuel element have been calculated. Also, parametric studies on the behaviour of the magnitudes with the burn-up, linear heat power and irradiation and cooling times were performed. Finally, a comparison between our results and other design calculations shows a good agreement and confirms the validity of the used method. (Author) 6 refs.

  5. Ionizing radiation effect on teas of Camellia sinensis plant irradiated with different water activities; Efeito da radiacao ionizante em chas da planta Camellia sinensis irradiados com diferentes atividades de agua

    Energy Technology Data Exchange (ETDEWEB)

    Fanaro, Gustavo Bernardes

    2013-07-01

    Tea is the most consumed beverage in the world. Teas from Camellia sinensis plant have high levels of antioxidants, which mean that they may have several beneficial effects on health preservation. For centuries, mankind looks for ways to conserve better and for a longer time the food that they eat. The food irradiation process is a largely technique used worldwide, and is recommended by many health agencies and authorities of several countries. The radiation interacts with the material causing two kinds of effects, the direct and the indirect effect. In the direct effect the radiation interacts with the DNA molecule, breaking it, and then inactivates the cell. In the indirect effect, which represents 70% of the interaction, the radiation breaks the water molecule in a process denominated radiolysis, creating a number of free radicals that will interact with the cellular components, leading to the cell death. Therefore, the aim of this work is to study the effects of gamma radiation on two kinds of tea from Camellia sinensis plant irradiated with different water activities. The green tea and black tea samples had their Aw adjusted to three values (high Aw, medium Aw, and low Aw). The samples were irradiated in {sup 60}Co source at doses of 0, 1.0, 1.5, 2.0, 2.5, 5.0, 7.5, and 10.0 kGy. The analyses used were: microbiology by plate count, total phenolic compounds quantification, antioxidant activity by ORAC assay, and identification and quantification of main antioxidants in these beverages. It was noted that the greater the quantity of free water present in the medium, the lower was the dose to achieve microbiological control. The green tea showed to be a little more susceptible to irradiation by high Aw once there was more variation in the amount of flavonoids and phenolics than the black tea, decreasing the amount of these compounds in some doses, but increasing the amount in other ones. However in both teas, these changes can be considered insignificant, since there was no difference in antioxidant activity at doses up to 10 kGy. The dose of 5.0 kGy was the minimum dose that secured the microbiological control and had no changes on the parameters analyzed. (author)

  6. Irradiated vegetal extracts of mormodica charantia and cymbopogom nardus for the control of Blatella germanica; Extratos vegetais irradiados de mormodica charantia e cymbopogom nardus no controle de Blatella germanica

    Energy Technology Data Exchange (ETDEWEB)

    Nahme, Ligia Cardoso; Villavicencio, Anna Lucia C.H. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Centro de Tecnologia das Radiacoes. Lab. de Analise e Deteccao de Alimentos]. E-mail: lignah@hotmail.com; villavic@net.ipen.br; Potenza, Marcos Roberto Potenza [Instituto Biologico de Sao Paulo, SP (Brazil). Centro de Sanidade Vegetal. Lab. de Protecao e Clinica Vegetal

    2000-07-01

    Pertaining to one of the groups oldest of the world; the cockroach possess a great adaptive capacity and if they find gifts in diverse environments, being usually found in residences; independent if conserved well. Besides causing infestations, the cockroach cause serious riots and illnesses, therefore they act as vectors of pathogenic agents. Had to these events the interest to control these insects it magnified. One of the control forms oldest that come very being used; they are the vegetal extracts, in order to identify alternative products that substitute the conventional insecticides and that they do not cause problems to the environment. In the experiment cool parts of the plants had been used (leaves and flowers), that they had been triturated and homogenized in the ratio of 1:9 distilled water parts. The gotten mass was filtered in paper filter and solution gotten stored in freezer for posterior use. The radiated botanical species in the watery extract form had been Aloe arborescens, Delonix regia, Hemerocalis flaval, in the doses of 0 kGy, 2,5 kGy, 5 kGy and 10 kGy. The vegetal extract soon was supplied to the insects through the alimentary diet (feline ration), which was dived during one minute in the respective extract and supplied to the insects after the drying in ambient temperature. The used cockroach met in nymphs of and stadium of development and confined in plastic containers of 10 cm of re-covered diameter and 8 cm of height with teladas covers. The evaluations had elapsed during 7 days, where they had been gotten resulted with 12% of efficiency in the Aloe arborescens species and no result in Hemerocalis flaval.

  7. Mechanical and Radiological Characterization of Different parts of an Irradiation Coolant Channel Tube from Atucha I Nuclear Plant; Caracterizacion Mecanica y Radiologica de Partes de Canales Refrigerantes Irradiados Extraidos del Reactor de la Central Nuclear Atucha I

    Energy Technology Data Exchange (ETDEWEB)

    Piquin, Ruben [Instituto Balseiro, Universidad Nacional de Cuyo, Centro Atomico Bariloche, Universidad Nacional de Mar del Plata (Argentina)

    2001-07-01

    The widespread replacement of reactor internals has generated a substantial volume of active material. It is essential to work with these components at least in a partial way before the next planned stop, which will take place during the second semester of the year 2002. Due to the fact that the reactor internals pool and the storage pool for irradiated nuclear fuel have limited capacities, it has been proposed to compact an experimental shift of 50 irradiated coolant channels, that are currently placed in storage pools. Basically the processed waste will be put in baskets at the bottom pools.The alternative choice proposes to divide an irradiation coolant channel tube into different parts: stainless steel section, zircaloy-4 section and stainless steel section with hardened zones with cobalt alloys named Estelite-6. The person in charge has already planned the constructive and operative solutions but the mechanical characterization of the different parts of the channel tube is necessary in order to dimension the compaction tool needed for the semi-industrial installation.In the present special report, two well-differentiated actions will be described. The necessary compacted strength of the irradiation coolant channel tube will be estimated for the stainless steel section and the zircaloy-4 section starting from experiment with unirradiated material and considering effects of radiation damage and hydrides on the ductility.These results will be used to design the necessary compacted tools for the semi-industrial installation. The necessary equipment for the radiological characterization of the different material sections already specified will be described and the most important emitting particles of radiation that could be detected will be mentioned. Also the decontamination process to use including the radiological characterization of every stage of the process will be described in order to establish the decontamination factor. Finally the most important radioactive elements than will remain after the decontamination in the different sections of the channel tube will be estimated with the purpose of establishing the type of end waste.

  8. Determination of alpha-Tocopherol (vitamin E) in irradiated garlic by high performance liquid chromatography (HPLC); Determinacao de alpha-tocoferol em alho irradiado utilizando cromatografia liquida de alta frequencia (CLAE)

    Energy Technology Data Exchange (ETDEWEB)

    Rios, Magda Dias Goncalves; Penteado, Marilene de Vuono Camargo [Sao Paulo Univ., SP (Brazil). Faculdade de Ciencias Farmaceuticas. Dept. de Alimentos e Nutricao Experimental]. E-mail: riosmagda@hotmail.com

    2003-02-01

    The effects of {sup 60}Co ionizing radiations in doses of 0, 75, 100, 150, 200 and 250Gy on garlic, upon the {alpha}-tocopherol concentration were studied. The {alpha}-tocopherol contents were established by high performance liquid chromatography (HPLC), after direct hexane extraction from the garlic samples. The {alpha}-tocopherol was determined through normal phase column, and mobile phase was composed by hexane: iso-propyl alcohol (99:01 v/v), with 2mL/min flow rate and fluorescence detector. It is statistically shown that an irradiation dose of up to 150 Gy does not affect the garlic {alpha}-tocopherol content. (author)

  9. Bibliographic review of works accomplished about irradiated chicken, fish and fish products , spices and condiments; Levantamento bibliografico de trabalhos realizados sobre aves, peixes e produtos de peixe, especiarias e condimentos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Bernardes, B; Dias Filho, M

    1983-07-01

    Table of foods that can be irradiated and its respective nominal doses are shown. Bibliographic reviews of works performed about irradiated chicken, fish and fish products, spices and condiments are shown. The irradiation purpose in chicken were to increase the shelf-life and to eliminate the pathogenic microorganism in chicken stored below 10{sup 0} C; in fish and fish products the purposes were to control the insect infestation in dry-fish during the storage and the sell exposure to reduce the macrobian charge in packed and non packed fish and in fish products. To reduce pathogenic microorganism in packing and unpacking fish; in spices and condiments to control the insect infestation, to reduce the microbial contamination. (L.M.J.).

  10. Analysis of the frequency of unstable chromosome aberrations in human lymphocytes irradiated with {sup 60}Co; Analise da frequencia de alteracoes cromossomicas instaveis em linfocitos humanos irradiados com {sup 60}Co

    Energy Technology Data Exchange (ETDEWEB)

    Mendonca, Julyanne C.G.; Mendes, Mariana E.; Lima, Fabiana F., E-mail: july_cgm@hotmail.com, E-mail: mendes_sb@hotmail.com [Centro Regional de Ciencias Nucleares (CRCN-NE/CNEN-PE), Recife, PE (Brazil); Santos, Neide, E-mail: santos_neide@yahoo.com.br [Universidade Federal de Pernambuco (CCB/UFPE), Recife, PE (Brazil). Departamento de Genetica

    2013-07-01

    The aim of this study was to analyze the frequency of unstable chromosomal aberrations induced by gamma radiation from a {sup 60}Co source at two different doses. Samples were obtained from a healthy donor and exposed to {sup 60}Co source (Gammacel 220 ) located in the Department of Nuclear Energy of Pernambuco Federal University (DEN/UFPe/Brazil) with a rate of air Kerma to 3,277 Gy/h. Exposures resulted in absorbed dose 0.51 Gy and 0.77 Gy. Mitotic metaphases were obtained by culturing lymphocytes for chromosome analysis and the slides were stained with 5% Giemsa. Among the unstable chromosomal aberrations the dicentric chromosomes, ring chromosomes and acentric fragments were analyzed. To calculate the significance level the chi - square test was used, considering relevant differences between the frequencies when the value of p < 0.05. To calculate the significance level of the chi - square test was used, considering relevant differences between the frequencies when the value of p < 0.05. The results showed that there was significant difference of the frequencies of dicentric chromosomes (from 0.18 to 0.51 to 0.37 Gy to 0.77 Gy), however there was no statistically significant difference between the frequencies of acentric fragments ( 0.054 to 0, 51 Gy to 0.063 to 0.77 Gy) and ring chromosomes (0.001 to 0.51 Gy to 0.003 to 0.77 Gy). The low number of rings is found justified, considering that in irradiated human lymphocytes, its appearance is rare relative to dicentrics. The results confirm that dicentrics are the most reliable biomarkers in estimating dose after exposure to gamma radiation. These two points will make the calibration curve dose-response being built for Biological Dosimetry Laboratory of CRCN-NE/CNEN.

  11. Sensitivity of Ceratitis capitata eggs irradiated in artificial diet and in mango fruits; Sensibilidade de ovos de Ceratitis capitata (WIED.,1824) irradiados em dieta artificial e em frutos de manga (Mangifera indica L.)

    Energy Technology Data Exchange (ETDEWEB)

    Raga, A.; Yasuoka, S.T.; Amorim, E.O.; Sato, M.E.; Suplicy Filho, N. [Instituto Biologico, Campinas, SP (Brazil); Faria, J.T. de [Delegacia Federal de Agricultura, Sao Paulo, SP (Brazil)

    1996-01-01

    The objective of this study was to establish gamma radiation doses required to prevent emergence of Ceratitis capitata adults, from irradiated eggs in artificial diet and mango fruits. Six-, twelve-, twenty-four-, and forty-eight-hour-old eggs were used. Artificial infestation by C. capitata was carried out in mangoes of Haden, Tommy and Keith cultivars. An increase of radiation resistance of C. capitata eggs was observed as a function of the embryonic development and a Probit 9 of 24.67 Gy was estimated for 48-hour-old eggs in artificial diet. No significant influence of mango fruits was found on the efficacy of irradiation. (author). 11 refs., 3 tabs.

  12. Study of the oxidation of the matrix of irradiated fuel under conditions of dry storage; Estudio de la oxidacion de la matriz del combustible irradiado en condiciones de almacenamiento en seco

    Energy Technology Data Exchange (ETDEWEB)

    Elorrieta, J. M.; Bonales, L. J.; Rodriguez, N.; Gutierrez, L.; Cobos, J.; Baonza, V. G.

    2014-07-01

    Spain holds the open cycle for the management of spent fuel of nuclear power stations. The solution adopted, given the urgent need for greater storage capacity, has been the construction of a centralized temporary storage, with an expected 100-year life, which will be stored from 2017 both spent fuel from nuclear power plants and other waste high activity of NPPs. (Author)

  13. Simulation of the heat transfer of a irradiated fuel storage container with code CFD STAR- CCM+; Simulacion de la transferencia de calor de un contenedor de almacenamiento de combustible irradiado con el codigo CFD STAR-CCM+

    Energy Technology Data Exchange (ETDEWEB)

    Barrera matalla, J. E.; Hernandez Gomez, J.; Riverala Gurruchaga, J.

    2012-07-01

    Irradiated fuel has become an object of interest in the industry by the importance of ensuring its safety during long periods of storage time. New containers, stores, methods and codes will be used to ensure a suitable cooling and residual heat removal, and secure the safety of fuel elements in dry storage. The codes CFD (Computational Fluid Dynamics) have great potential to help in design of containers and stores, improving thermal-hydraulic performance and the extraction of heat generated.

  14. Thermoluminescent characteristics of CaSO{sub 4}:Dy+PTFE irradiated with high energy electron beams; Caracteristicas termoluminiscentes del CaSO{sub 4}:Dy+PTFE irradiado con haces de electrones de alta energia

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez, R.; Rivera, T.; Calderon, J. A.; Jimenez, Y. [IPN, Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Av. Legaria 694, Col. Irrigacion, 11500 Mexico D. F. (Mexico); Rodriguez, J. [Hospital General de Mexico, Dr. Balmis 148, Col. Doctores, 06726 Mexico D. F. (Mexico); Oviedo, O. [Centro Medico ABC, Sur 136 No. 116, Col. Las Americas, 01120 Mexico D. F. (Mexico); Azorin, J., E-mail: chagua@hotmail.com [Universidad Autonoma Metropolitana, Unidad Iztapalapa, Av. San Rafael Atlixco 186, 09340 Mexico D. F. (Mexico)

    2011-10-15

    In the present work thermoluminescent response of dysprosium doped calcium sulfate embedded in polytetrafluorethylene (CaSO{sub 4}:Dy+PTFE) under high electron beam irradiations from linear accelerator for clinical applications was investigated. The irradiations were carried out using high electron beams (6 to 18 MeV) from a linear accelerator Varian, C linac 2300C/D, for clinical practice purpose. The electron irradiations were obtained by using the water solid in order to guarantee electronic equilibrium conditions. Field shaping for electron beams was obtained with electron cones. Glow curve and other thermoluminescent characteristics of CaSO{sub 4}:Dy+PTFE were conducted under high electron beams irradiations. The thermoluminescent response of the pellets showed and intensity peak centered at around 235 C. Thermoluminescent response of CaSO{sub 4}:Dy+PTFE as a function of high electron absorbed dose showed a linearity in a wide range. To obtain reproducibility characteristic, a set of pellets were exposed repeatedly for the same electron absorbed dose. The results obtained in this study can suggest the applicability of CaSO{sub 4}:Dy+PTFE pellets for high electron beam dosimetry, provided fading is correctly accounted for. (Author)

  15. Physicochemical, rheological, thermal, and bread making properties of flour obtained from irradiated wheat;Propriedades fisico-quimicas, reologicas, entalpicas e de panificacao da farinha obtida de trigo irradiado

    Energy Technology Data Exchange (ETDEWEB)

    Singer, Carolina Sobral

    2006-07-01

    Most of the methods that are nowadays used for food preservation derive from old times. Besides these methods, new non-thermal methods have been developed in order to improve food quality during its processing. Irradiation technology has a great contribution potential to improve preservation, storage and distribution of foods. Several studies from international literature have reported the efficiency of irradiation process on microbiological control of grains and their products. Due to the low technological quality of national wheat, Brazil depends on its import. Wheat is the main ingredient of bread which is one of the most important products of Brazilian people's diet. The objective of this work was to study the effect of ionizing radiation on wheat on physicochemical, rheological, and thermal properties of flour produced from this wheat, and consequently, its performance on bread making. All experiments were conducted on laboratory scale. Wheat was submitted to irradiation on different doses (0.0; 0.5; 1.0 and 2.0 kGy) and flour produced underwent physicochemical, rheological, thermal and microbiological analyses. Flour bread making performance was measured through quality of bread. None of the physicochemical, rheological or thermal parameters was influenced by irradiation, with the exception of Falling Number, which decreased significantly with the increase of irradiation dose, indicating the effect of irradiation on wheat starch, and consequently on dough's gelatinization. Bread quality parameters did also not show significant differences, and sensory analysis showed that bread produced from irradiated and non irradiated wheat did not present perceivable flavor. (author)

  16. Thermoluminescent response of Y{sub 2}O{sub 3}:Ce,Eu irradiated with X-rays; Respuesta termoluminiscente del Y{sub 2}O{sub 3}:Ce,Eu irradiado con rayos X

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez J, F. del R. [Universidad APEC, Escuela de Ingenieria, Apdo. Postal No. 2867, 10107 Santo Domingo (Dominican Republic); Sosa A, M. A., E-mail: sanchezjaquez@gmail.com [Universidad de Guanajuato, Division de Ciencias e Ingenierias, Campus Leon, 37670 Leon, Guanajuato (Mexico)

    2017-10-15

    The thermoluminescent response of various materials has been studied when irradiated with X-rays, and the parameters that characterize the order of the kinetics of the material, depth of traps and frequency have been determined. The objective of this project was to characterize the thermoluminescent response of dosimeters based on yttrium oxide (Y{sub 2}O{sub 3}) irradiated with X-rays. To do this, the thermoluminescent response of the Y{sub 2}O{sub 3}:Ce,Eu dosimeter was measured and exposed to an X-ray radiation field; five levels of radiation were used: in the first, a potential of 53.5 kv was used and a working load of 5.6 m As, in the second: 70.0 kv, 12.5 m As; in the third: 81.0 kv, 20.0 m As; in the fourth: 109 kv, 32 m As, in the fifth: 121 kv, 80.0 m As, applying an exposure range between 17.7 and 40 R. The irradiation was performed exposing the sample at 104 cm from the focus of the X-ray tube. To obtain the readings of the thermoluminescent response, a Harshaw TLD 3500 reader was used. The data captured by the reader was processed using the WinREMS software. The deletion protocol was as follows: the dosimeters already read were placed, one hour in the Terlab MA12D muffle at a temperature of (400 ± 1) degrees centigrade, the dosimeters were removed and left at room temperature of 20 degrees centigrade for 20 minutes. Then they were placed in the Binder high temperature oven ED23 at 100 ± 1 centigrade degrees for 2 hours. The brightness curves were de convolved using the WebPlotDigitizer v 3.8 software and the individual peaks of the brightness curves were obtained. We found that: the synthesized materials presented a good thermoluminescent response when irradiated with X-rays. However, only one of the dosimeters, of Yttrium oxide doped with 0.5% Cerium, showed a relatively linear response in the applied dose range. The analysis made to the brightness curve of the Yttrium oxide doped with Cerium at 0.5%, applying the method of the three points for the parameters determination showed that this material presents an kinetics order b = 1. (Author)

  17. Effect of gamma irradiated parenchyma on the growth of irradiated potato tuber buds; Efecto del parenquina irradiado sobre el desarrollo de las yemas de tuberculos de patata tratados por radiacion GAMMA

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Gonzalez, J; Garcia Collantes, M A

    1976-07-01

    The development of buds greffed on irradiated potato parenchyma was studied. The irradiated parenchyma does not influence the sprouting capacity of buds, but it affects the way they develop. (Author) 9 refs.

  18. Intrapulpal temperature during preparation with the Er:YAG laser: an in vitro study; Avaliacao da temperatura intrapulpar de incisivos bovinos irradiados com o laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Geraldo-Martins, Vinicius Rangel

    2003-07-01

    This study evaluated the variation of the pulp chamber temperature when dentine, with 2,0 mm of thickness, adjacent to the pulp, was irradiated by the Er:YAG laser. Seventy two bovine incisors were used, that had the enamel and dentine of the buccal surface weared until to reach the thickness used in this study. The teeth were divided in 3 groups, according with the repetition rate used ( Group I = 2 Hz; Group II = 4 Hz and Group III = 6 Hz), and irradiated, with or without water cooling, using 250, 300 and 350 mJ of energy per pulse. Thermocouples were introduced inside the pulp chamber through the palatine opening of the samples and fixed to the vestibular wall of the pulp chamber using a thermal paste. After the statistical analysis, it was verified that there was a decrease of the intrapulpal temperature for all of the parameters in the group I irradiated with water cooling. In the same group, but without cooling, occurred increases of the intrapulpal temperature, however they were less than 2 deg C. In the group 11, only the para meter 350 mJ/4 Hz/ with water cooling presented decrease of the temperature (-0,08 deg C). The other irradiations presented increase of the intrapulpal temperature, varying from 1,5 to 1,9 deg C for irradiations without cooling and of 0,03 the 0,58 deg C for the samples irradiated under water cooling. In the group III, all of the samples presented increase of the intrapulpal temperature, however, they were smaller than to 2,5 deg C. The conditions of this study allow to conclude that the use of the laser of Er:YAG promoted acceptable temperature increases inside the pulp chamber, not reaching the critical level of 5,5 deg C. However, in spite of the temperature variations inside the pulp chamber have not reached critical levels, this procedure should not be recommended because macroscopic observations of the dentine irradiated without water cooling showed dark lesions, suggesting carbonization of this tissue. (author)

  19. In vitro study of morphological and chemical modification threshold of bovine dental enamel irradiated by the holmium laser; Estudo in vitro das alteracoes morfologicas e quimicas do esmalte dental bovino irradiado pelo laser de holmio

    Energy Technology Data Exchange (ETDEWEB)

    Eduardo, Patricia Lerro de Paula

    2001-07-01

    The aim of this study is to investigate the Ho:YLF laser effects on the dental enamel surface with regards to its morphology, thermal variations during its irradiation in the pulp chamber and its increased resistance to demineralization through quantitative analysis of calcium and phosphorous atoms reactive concentrations in samples. Twenty samples of bovine enamel were used and divided in four groups: control - acidulated phosphate fluoride (APF) application followed by demineralization treatment with lactic acid; irradiation with Ho:YLF laser (100 J/cm{sup 2}) followed by APF topic application and demineralization treatment with lactic acid; irradiation with Ho:YLF laser (350 J/cm{sup 2}) followed by APF topic application and demineralization treatment with lactic acid: and irradiation with Ho:YLF laser ( 450 J/cm{sup 2}) followed by APF topic application and demineralization treatment with lactic acid. Ali samples were quantified according to their calcium and phosphorous atoms relative concentrations before and after the treatments above. X-Ray fluorescence spectrochemical analysis and scanning electron microscopy were carried out. It was observed an increase on the calcium and phosphorous atoms concentration ratio and therefore the enamel demineralization reduction as a result of the lactic acid treatment in the samples irradiated with the holmium laser followed by the APF application. In order to evaluate the feasibility of this study for clinical purposes, morphological changes caused by the holmium laser irradiation were analyzed. Such modifications were characterized by melted and re-solidified regions of the enamel with consequent changes on its permeability and solubility. Temperature changes of ten human pre-molars teeth irradiated with 350 J/cm{sup 2} and 450 J/cm{sup 2} were also monitored in the pulp chamber in real time. Temperature increases over 4,20 C did not occur. The results obtained from this study along with the results from previous researches developed at 'Center for Lasers and Applications (IPEN)', indicate the holmium laser as a promising alternative for the Preventive Dentistry. (author)

  20. Toxoplasma gondii vs ionizing radiation: intestinal immunity induced in C57bl/6j mice by irradiated tachyzoites; Toxoplasma gondii vs radiacao ionizante: estudo da imunidade intestinal em camundongos C57Bl/6j experimentalmente vacinados com taquizoitos irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Galisteo Junior, Andres Jimenez. E-mail: galisteo@usp.br

    2004-07-01

    We study the oral route for the development of a vaccine for toxoplasmosis, using parasites irradiated with 60 Cobalt, as an alternative for vaccine development to this worldwide parasitic infection. We evaluated the development of immunity at serum or mucosal levels, and their efficiency in protect the mice against challenge with oral cysts of the Me-49 strain. C57Bl/6j isogenic mice were immunized by oral route with 107 255 Gy irradiated tachyzoites from RH strain, at several protocols using milk as anti-peptic adjuvant and alum hydroxide as antacid. The preparations of irradiated tachyzoites induced production of serum IgG and IgA in immunized mice, as determined by ELISA, with IgG2a as the dominant subclass, similar to chronic infection. Their use with adjuvant allowed the excretion of significant amounts of IgA in stools also IgG, despite a lesser extent. There are suggestion of tolerance induction at mucosal level, with lower antigen induced proliferation and lower in vitro antibody production by spleen and gut lymphocytes, with the latter doses, specially when milk was used as adjuvant. All oral preparations induced some quantitative protection against challenge, which was similar to the parenteral route only isolated alum hydroxide was used as adjuvant. All these data support the possibility of the development of an oral vaccine against toxoplasmosis, using irradiated tachyzoites, which would be possible tool in near future for use in field baits, for immunizing either domestic or wild felines. (author)

  1. Role of the inhibitors of angiotensin renin system on the DNA integrity of irradiated spermatozoids; Papel dos inibidores dos sistema renina angiotensina sobre a integridade do DNA de espermatozoides irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Spadella, Maria A.; Mansano, Naira S.; Schwarz, Franciele C.; Viani, Gustavo A.; Chies, Agnaldo B. [Faculdade de Medicina de Marilia (FAMEMA), Marilia, SP (Brazil)

    2016-07-01

    Radiation action in the testes can significantly affect the reproductive capacity due to oxidative stress generated; phenomenon in which there is evidence of involvement of the Renin Angiotensin System (RAS). This study evaluated the role of AT1 receptor inhibitors, in mitigating the radioinduced DNA damage sperm from semen samples left vas deferens. Male Wistar rats were divided into six experimental groups: Control, 5Gy, Telmisartan (12mg/kg/day) and Losartan (34mg/kg/2x/day), 5 Gy + Telmisartan and 5 Gy + Losartan. The results showed increase in the percentage of sperm with fragmented DNA in irradiated groups when compared to controls, which was not reversed in the irradiated and treated groups. The radiation of 5Gy (single dose) affected the DNA-protein complex of the sperm and the treatments did not influence in reversing this damage, considering the experimental protocol used. (author)

  2. Effects of irradiated Bothropstoxin-1 and Bothrops jararacussu crude venom on the immune system; Acao da Bothropstoxina-1 e do veneno total de Bothrops jararacussu irradiados sobre o sistema imune

    Energy Technology Data Exchange (ETDEWEB)

    Caproni, Priscila

    2009-07-01

    Ionizing radiation has been successfully employed to modify the immunological properties of biomolecules and has been proven to be a powerful tool to attenuate snake venoms toxicity without affecting and even increasing their immunogenic properties. Very promising results were obtained when crude animal venoms, as well as isolated toxins, were treated with {sup 60}Co gamma rays, yielding toxoids with good immunogenicity, however, little is known about the modifications that irradiated molecules undergo and even less about the immunological response that such antigens elicit. At the present work, we have evaluated the effects on immune system of B10.PL and BALB/c mice of Bothrops jararacussu crude venom and isolated bothropstoxin-1 (Bthx-1), before and after gamma radiation exposition. According to our data, irradiation process promoted structural modifications on both isolated toxin and crude venom, characterized by higher molecular weight protein (aggregates and oligomers) formation. Irradiated samples were immunogenic and the antibodies elicited by them were able to recognize the native toxin in ELISA. These results indicate that irradiation of toxic proteins can promote significant modifications in their structures, but still retain many of the original antigenic and immunological properties. Also, our data indicate that the irradiated protein induced higher titers of IgG2b, suggesting that Th1 cells were predominantly involved. Results from Western blot assay showed that antibodies raised against irradiated bothropstoxin-1 recognize both native isolated toxin or crude venom. Cytotoxicity assay showed that irradiated toxin and crude venom were less toxic than their native counterpart. Thus, the viability of the macrophages cultured in the presence of irradiated Bthx-1 or crude venom was higher if compared with their native forms. LDH Assay showed that irradiated Bthx-1 promotes less muscular damage than the native form. Our data confirm a potential use of ionizing radiation for immunization process improvement. (author)

  3. Dosimetry of irradiated foods and extraction of polyminerals from herbs and seasonings (Guajillo chili, oregano, jamaica, arnica, and camomile); Dosimetria de alimentos irradiados y extraccion de poliminerales de hierbas y condimentos (Chile guajillo, oregano, jamaica, arnica y manzanilla)

    Energy Technology Data Exchange (ETDEWEB)

    Pineda C, S.; Gomez B, C. [Estudiante de la Facultad de Quimica, UNAM (Mexico); Calderon, T.; Cruz Z, E. [Depto. de Quimica Agricola-Geologia-Geoquimica, Universidad Autonoma de Madrid, 28049 (Spain)

    2002-07-01

    Nowadays, in developed countries the irradiation technology is a process used in food treatments for sterilization and diminishing of the microbiological charge, as well as to extend the storage life. In Mexico, the food irradiation, spices and seasonings has been officially approved since 1995, recognizing as an adequate technological process for foods. Taking advantage of knowledge about solids and due to the natural growth of the spices, herbs, etc. these contain minerals which can providing important information of its radiological history, moreover these type of materials do not degrade them preserving by long time periods. In this work, a methodology for the extraction of poly minerals in foods, such as oregano, guajillo chili, jamaica, arnica and camomile is presented. For obtaining the poly mineral, the samples were treated with an ethanol-water solution, in constant stirring during 12 hours at room temperature depending on the sample under treatment. It was used oxygenated water and distilled for washing and acetone for achieving a good drying. The minerals were processed by gamma radiation in the Nuclear Sciences Institute of the UNAM. The brilliance curves of spices and herbs, using a Tl reader of Harshaw 3500 were obtained, the emissions are located between 60 and 350 Centigrade. Previously the extraction of poly mineral was realized and they were divided in same parts for doses between 2 and 10 KGy, this last value according to the Mexican Official Standard considering a fraction without irradiating as reference. The identification of the mineral fraction by diffraction will complement the composition information. We are grateful to the donation of seasonings samples provided by the Tres Villas Natural Seasonings enterprise, Toluca plant, State of Mexico and the Academic Exchange Office at UNAM. (Author)

  4. Thermoluminescence of pure LiF and Lif (TLD-100) irradiated at room temperature; Termoluminiscencia en LiF puro y LiF dosimetrico (TLD-100), irradiados a temperatura ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Sagastibelza Chivite, F

    1980-07-01

    The thermoluminescence of pure LiF and LiF (TLD-100) crystals irradiated at room temperature with x - or gamma-rays has been studied up to 460 degree centigree. For most of the glow peaks found the kinetics, preexponential factors and activation energies have been determined. These parameters have been obtained by means of the isothermal method. The study of the thermal annealing of the radiation induced F and Z centres has allow to show that there is a correlation among the glow peaks and the annealing stages of these centres. It is concluded that the F and Z - centres play the role of recombination centres for halogen interstitial atom thermally released from traps. Light emission occurs in this recombination. (Author) 120 refs.

  5. Biological effects in lymphocytes irradiated with {sup 99m}Tc: determination of the curve dose-response; Efeitos biologicos em linfocitos irradiados com {sup 99m}Tc: determinacao da curva dose-resposta

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Romero Marcilio Barros Matias de

    2002-08-01

    Biological dosimetry estimates the absorbed dose taking into account changes in biological parameters. The most used biological indicator of an exposition to ionizing radiation is the quantification of chromosomal aberrations of lymphocytes from irradiated individuals. The curves of dose versus induced biological effects, obtained through bionalyses, are used in used in retrospective evaluations of the dose, mainly in the case of accidents. In this research, a simple model for electrons and photons transports was idealized to simulate the irradiation of lymphocytes with {sup 99m} Tc, representing a system used for irradiation of blood cells. The objective of the work was to establish a curve of dose versus frequencies of chromosomal aberrations in lymphocytes of human blood. For the irradiation of blood samples micro spheres of human serum of albumin (HSAM) market with {sup 99m} Tc were used, allowing the irradiation of blood with different administered activities of {sup 99m} Tc, making possible the study the cytogenetical effects as a function of such activities. The conditions of irradiation in vivo using HSAM spheres marked with {sup 99m} Tc were simulated with MCNP 4C (Monte Carlo N-Particle) code to obtain the dose-response curve. Soft tissue composition was employed to simulate blood tissue and the analyses of the curve of dose versus biological effect showed a linear quadratic response of the unstable chromosomal aberrations. As a result, the response of dose versus chromosomal aberrations of blood irradiation with {sup 99m} Tc was best fitted by the curve Y=(8,99 {+-}2,06) x 1-{sup -4} + (1,24 {+-}0,62) x 10{sup -2} D + (5,67 {+-} 0,64) x 10{sup -2} D{sup 2}. (author)

  6. Separation of transuranic elements and some fission products in irradiated spent fuels. Program 2005; Separacion de elementos transuranicos y algunos productos de fision presentes en los combustibles nucleares irradiados Programa 2005

    Energy Technology Data Exchange (ETDEWEB)

    Caravaca, C.; Espartero, A. G.; Cordoba, G. de; Gascon, J. L.; Pina, G.; Martinez-Esparza, A.; Uriarte, A.

    2006-07-01

    This technical publication of ENRESA refers to Partitioning of some chemical elements containing longlived radionuclides (actinides and fission products), from spent nuclear fuels. The Partitioning includes the different processes developed or on R and D way, from the middle of the past century to the present. These processes are of two types, wet (hydro-metallurgical) and dry (pyro-metallurgical). Among the hydro-metallurgical processes the most important is the PUREX process, developed in the U.S.A. at the middle of the past century, used for the separation of uranium and plutonium from spent nuclear fuels, previous dissolution with nitric acid of the irradiated fuels. Later other hydrometallurgical processes have been developed for the separation of some TRUs and long-lived fission products from the high activity liquid (HLW) coming from PUREX reprocessing. Among the most important countries and institutions that are developing new hydrometallurgical processes are USA, Japan, China, Russia and the European Union, fundamentally France, the Czech Republic, United Kingdom, Italy, Belgium, Holland, Germany, Spain and the JRC-ITU. In the case of Spain it is possible to remark the works of synthesis of new extractants, developed by the group of the Prof. Javier de Mendoza of the Dept. of Organic Chemistry of the Universidad Autonoma de Madrid and by the group of Prof. Teixidor of the Instituto de Ciencias de Materiales de Barcelona (ICMAB) of the Consejo Superior de Investigaciones Cientificas (CSIC) and the activities carried out by the CIEMAT from 1999, based fundamentally on a collaboration agreement with ENRESA, that are related to the characterization and tests of the new extractants synthesized in Spain and also abroad, mainly by the CEA (France). All these activities are included in the Projects PARTNEW and EUROPART of the European Union. About Pyro-metallurgical Processes, they started in the ANL (Argonne National Laboratory, USA) by the 60' is of the past century. In the same dates, the Instituto de Investigacion de Reactores Atomicos of Russia (RIAR) started the development of pyro-metallurgical reprocessing of spent fuels UO2 and MOX. Later these research activities have followed with other types of fuels. In 1988 the Commission of Atomic Energy of Japan launched a program of R and D, named OMEGA Project for partitioning and transmutation of long-lived radionuclides. This program is being carried out by four Japanese institutions: JAERI, PNC, JNC and CRIEPI. From 1999 two Projects on pyro-metallurgical partitioning PYROREP and EUROPART started in the European Union, with the participation of the following countries France, United Kingdom, Italy, Spain and the Czech Republic, together with the JRC-ITU in collaboration with CRIEPI (Japan). The activities of the CIEMAT in Project PYROREP have been carried out together with the Dept. of Analytical Chemistry of the Universidad of Valladolid. Later and within the EUROPART Project, a collaboration agreement between CIEMAT and CEA has been signed and it has been included in a collaboration and financial agreement between ENRESA and CIEMAT from 1998. (Author)

  7. Influence of the incidence angle on the morphology of enamel and dentin under Er:YAG laser irradiation; Estudo da influencia da angulacao do feixe laser na morfologia de esmalte e dentina irradiados com laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Junqueira Junior, Duilio Naves

    2002-07-01

    The purpose of this study is to make an in vitro evaluation, using scanning electron microscopy, of the influence of the laser beam irradiation angle on the enamel and dentin morphology. These tissues were both irradiated by Er:YAG Laser, with the same energy parameter. Twenty-four incisive bovine teeth were used, separated in eight groups, four of enamel, and four of dentin, with three specimens in each group. Each specimen was submitted to three laser applications, varying the incidence angle, between the laser and the tooth surface, at 90, 50 and 20 degrees. The applied frequency was 2 Hz, with 20 pulses in each application. The KaVo Key Laser 3 was employed, wavelength at 2940 nm, adjustable energy from 40 to 600 mJ and repetition rate from 1 to 25 Hz. The groups were distributed according to the energy parameter as follows - enamel: 250 mJ; 300 mJ; 350 mJ and 400 mJ; dentin: 200 mJ; 250 mJ; 300 mJ and 350 mJ. The results evidenced the Laser incidence angle importance; it is an essential parameter in the protocol of utilization and it should not be disregarded. The observations of this study allow to conclude that the Laser incidence angle has direct influence on the morphological aspect of the alterations produced in enamel and dentin. (author)

  8. Results of work in the hot cells of Laboratory Testing Materials Irradiated Areva of Carina project for the expansion of the database of mechanical characteristics of fractures in materials of RPV German irradiated; Resultados del trabajo en las celdas calientes del Laboratorio de Ensayos de Materiales Irradiados de Areva del proyecto Carina para la ampliacion de la base de datos de caracteristicas mecanicas de las fracturas en materiales de RPV alemanas irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Barthelmes, J.; Schabel, H.; Hein, H.; Kein, E.; Eiselt, C.

    2013-07-01

    In the frame of the already completed research projects CARINA and its predecessor CARISMA a data base was created for pre-irradiated original RPV steels of German PWRs which allowed to examine the consequences if the Master Curve (T{sub 0}) approach instead of the RT{sub N}OT concept is applied to the RPV safety assessment. Furthermore in CARINA different irradiation conditions with respect to the accumulated neutron fluences and specific impact parameters were investigated. Besides a brief introduction of the CARINA project and an overview of the main results an overview on the requirements of the hot laboratory work in terms of specimen manufacturing and material testing is given and examples for realization are shown. (Author)

  9. Efeito do EDTA e EDTA-T aplicado de forma ativa na remoção de "smear layer" de superfícies radiculares

    OpenAIRE

    Sampaio, José Eduardo Cezar; Rached, Ricardo Samih Georges Abi; Pilatti, Gibson Luiz; Theodoro, Letícia Helena; Batista, Luiz Henrique Carvalho

    2003-01-01

    The purpose of this study was to compare the removal of root surface smear layer following active application of EDTA gel and EDTA-T (texapon) gel in different concentrations (5%, 10%, 15%, 20% and 24%), using scanning electron microscopy. A total of 220 dentin blocks obtained from the root surfaces of extracted teeth were divided into 3 groups: Group I - (control) application of saline solution (n = 20); Group II - EDTA gel (pH 7.0) was applied in the following concentrations: 5%, 10%, 15%, ...

  10. The combined effect of the gamma radiations of 60 Co and different chemicals on the cells of the radicular vegetative tip of Allium sativum L

    International Nuclear Information System (INIS)

    Dumitrescu, Rodica; Popescu, D.; Andrei, M.

    1999-01-01

    The gamma ionizing radiations used alone in the treatment of Allium Sativum L. affected differently the cells belonging to the two zones of the root causing modifications of the cellular parameters which have been previously estimated. Data in the literature established that the damage of the interphasic nucleus of the cells determines the obstruction of the DNA synthesis and the delay of the cell mitosis. Sparrow, A. H., Miller, M. W. and Al-Rubeai confirmed the existence of a relationship between the nuclear volumes and the radiosensitivity of the different types of cells. The aim of this experiment was to counteract the harmful effect of gamma radiations at cellular level with the help of combined treatments, namely, the gamma radiations associated with different chemicals having radioprotective effects. The biological significance of the obtained values was established by statistical calculations with the help of the Student (t) test. The values of the estimated cellular parameters, NV, ICV, CV, NCR showed that, although there were certain fluctuations, their values were not always significant. (author)

  11. Presença de genes de resistência a agentes antimicrobianos em saliva, biofilme supragengival e canais radiculares infectados

    OpenAIRE

    Ludmila Coutinho Moraes

    2013-01-01

    Embora diferentes estudos indiquem que há um aumento da resistência dos microrganismos aos agentes antimicrobianos prescritos, pouco se sabe a respeito da sua distribuição na cavidade oral. A presente dissertação está dividida em dois capítulos, representados por dois diferentes manuscritos. No manuscrito I, uma revisão sistemática foi realizada e teve como objetivo determinar quais genes de resistência a antimicrobianos foram pesquisados em saliva (S), no biofilme supragengival (SB) e canal ...

  12. DIAGNOSTIC POSSIBILITIES OF 3D-COMPUTED TOMOGRAPHY WITH INTRALESIONAL APPLICATION OF CONTRAST MATERIAL IN A CASE OF VERY LARGE RADICULAR MAXILLARY CYST - A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Galina Gavazova

    2017-09-01

    Full Text Available Introduction: Diagnosis of odontogenic cysts despite their benign nature is a critical and challenging problem. Aim: The aim of this article is to demonstrate a different diagnostic approach in case of very large odontogenic cyst. Materials and Methods: This study was executed on one male patient aged of 38 using 3D computed tomography and contrast material inside the lesion. Differential diagnosis made by the residents was compared to the histopathological examination as the gold standard for identifying the nature of the cysts. Results: This diagnostic approach using 3D computed tomography combined with contrast material injected inside the lesion shows the real borders of the cyst of the maxilla and helps oral surgeon in planning the volume of the surgical intervention. Conclusion: Precise diagnose ensure the possibility of doing the optimal surgical intervention- a precondition for best wound healing.

  13. Salmon and human thrombin differentially regulate radicular pain, glial-induced inflammation and spinal neuronal excitability through protease-activated receptor-1.

    Directory of Open Access Journals (Sweden)

    Jenell R Smith

    Full Text Available Chronic neck pain is a major problem with common causes including disc herniation and spondylosis that compress the spinal nerve roots. Cervical nerve root compression in the rat produces sustained behavioral hypersensitivity, due in part to the early upregulation of pro-inflammatory cytokines, the sustained hyperexcitability of neurons in the spinal cord and degeneration in the injured nerve root. Through its activation of the protease-activated receptor-1 (PAR1, mammalian thrombin can enhance pain and inflammation; yet at lower concentrations it is also capable of transiently attenuating pain which suggests that PAR1 activation rate may affect pain maintenance. Interestingly, salmon-derived fibrin, which contains salmon thrombin, attenuates nerve root-induced pain and inflammation, but the mechanisms of action leading to its analgesia are unknown. This study evaluates the effects of salmon thrombin on nerve root-mediated pain, axonal degeneration in the root, spinal neuronal hyperexcitability and inflammation compared to its human counterpart in the context of their enzymatic capabilities towards coagulation substrates and PAR1. Salmon thrombin significantly reduces behavioral sensitivity, preserves neuronal myelination, reduces macrophage infiltration in the injured nerve root and significantly decreases spinal neuronal hyperexcitability after painful root compression in the rat; whereas human thrombin has no effect. Unlike salmon thrombin, human thrombin upregulates the transcription of IL-1β and TNF-α and the secretion of IL-6 by cortical cultures. Salmon and human thrombins cleave human fibrinogen-derived peptides and form clots with fibrinogen with similar enzymatic activities, but salmon thrombin retains a higher enzymatic activity towards coagulation substrates in the presence of antithrombin III and hirudin compared to human thrombin. Conversely, salmon thrombin activates a PAR1-derived peptide more weakly than human thrombin. These results are the first to demonstrate that salmon thrombin has unique analgesic, neuroprotective and anti-inflammatory capabilities compared to human thrombin and that PAR1 may contribute to these actions.

  14. Obturação tridimensional dos canais radiculares: lentulo ou lima endodôntica? = Tridimensional filling of root canal: lentulo spiral or endodontic file?

    Directory of Open Access Journals (Sweden)

    Souza, Joice Maciel

    2005-01-01

    Full Text Available No protocolo UFSC para tratamento endodôntico de dentes decíduos, é utilizado Ca(OH² em propilenoglicol para curativos de demora e OZE para obturação definitiva do canal, sendo levados a ele pela espiral lentulo ou lima endodôntica. Portanto, foi objetivo desta pesquisa verificar in vitro a eficiência da obturação em profundidade(P e lateralidade (L com pasta de Ca(OH² e cimento OZE, nos limites pré-estabelecidos pelo preparo biomecânico. Para isto, 4 grupos de 10 dentes cada, foram obturados com: Ca(OH² levado com lentulo e lima (GI e GII, e os dois grupos restantes (GIII e GIV obturados com OZE levados também com lentulo e lima, respectivamente. A obediência da obturação aos limites pré-estabelecidos foram analisados em radiografias, nos sentidos M-D e V-L, por 3 examinadores. As distâncias em profundidade foram medidas, conferindo escore 0 (distância de 0 a -1 mm do limite ideal, escore 1 (distância de ±2 e ±3 mm do limite ideal. Para lateralidade as obturações eram adequadas (A quando todo o espaço M-D do canal estava preenchido, caso contrário eram consideradas inadequadas (I. Os resultados demonstraram que o GII apresentou melhores resultados, obedecendo ao limite apical de obturação (Teste de Mann-Whitney/p = 0,0059. Quando o OZE foi utilizado não houve diferença entre GIII e GIV com 80% de obturações adequadas. O Teste de Proporção mostrou que a lentulo preenche os canais em lateralidade de forma mais efetiva independente de ser Ca(OH² ou OZE (Z = 4,05/p < 0,001. Concluísse que a lentulo e a lima são efetivos, em obturar os canais em profundidade, porém em lateralidade a lentulo é superior à lima, sugerindo que em alguns casos devemos utilizar os métodos combinados, para evitar o extravasamento do material obturador

  15. Genetic control of wheat seedling root growth Controle genético do crescimento radicular de plântulas de trigo

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo de Oliveira Camargo

    2005-08-01

    Full Text Available Wheat cultivars should have long primary roots to allow good crop establishment, considering the short crop establishment season (April in the State of São Paulo, Brazil, where the occurrence of water stress is frequent. This paper demonstrates the control and type of inheritance of the primary root growth trait. Crosses were made between genotypes, BH-1146 and KAUZ "S"/IAC-24 M4 with strong and reduced primary root growth, respectively. F2 and F3 generation seeds from these crosses and F2 generation seeds from the backcrosses of both parents were also obtained. Seedlings from these genotypes plus the parentals were evaluated in relation to primary root growth in complete nutrient solutions containing 3.875 mg L-1 phosphorus, at pH 4.0 and a temperature of 25 ± 1°C for 10 days. Control of the primary root growth trait was demonstrated to have quantitative inheritance. The degrees of dominance showed that the genes for strong root growth had a partially recessive behavior. Heterosis and heterobeltiosis values were negative. The estimated broad-sense heritability for root growth indicated that a great part of the observed variation was of genetic origin. The narrow-sense heritability indicated that a great part of the total genetic variability in relation to the trait under consideration is due to a small number of genes. Considering the estimated coefficient of determination, selection for strong root growth would be effective even when made in the early segregant generations after the cross.Os cultivares de trigo devem apresentar raízes primárias longas para permitir um bom estabelecimento da cultura, considerando o curto período de estabelecimento da cultura (abril no Estado de São Paulo, onde é freqüente a ocorrência de estresse hídrico. Este trabalho visa demonstrar o controle e o tipo de herança envolvida na expressão do caracter crescimento da raiz primária. Foram feitos cruzamentos entre os cultivares BH-1146 e KAUZ "S"/IAC-24 M4 com grande e reduzido crescimento das raízes primárias, respectivamente. Sementes em gerações F2 e F3 desses cruzamentos e em geração F2 dos retrocruzamentos para ambos os genitores foram também obtidas. Avaliaram-se plântulas dessas populações mais os parentais quanto ao crescimento das raízes primárias, em soluções nutritivas completas com 3,875 mg L-1 de fósforo, pH de 4,0 e temperatura de 25 ± 1°C, durante dez dias. O controle do crescimento das raízes primárias foi demonstrado ter herança quantitativa. Os graus de dominância mostraram que os genes para maior crescimento das raízes tiveram um comportamento parcialmente recessivo. Os valores para heterose e heterobeltiose para a geração F2 foram negativos. Os valores da herdabilidade em sentido amplo para o crescimento das raízes indicaram ser de origem genética grande parte da variação observada nas populações estudadas. A herdabilidade no sentido restrito indicou que grande parte da variabilidade genética total para esta característica deve-se a poucos genes. Com base na estimativa do coeficiente de determinação, sugere-se que a seleção para esta característica seria efetiva mesmo se realizada nas primeiras gerações segregantes.

  16. Effect of minocycline on lumbar radicular neuropathic pain: a randomized, placebo-controlled, double-blind clinical trial with amitriptyline as a comparator

    NARCIS (Netherlands)

    Vanelderen, P.; Zundert, J. Van; Kozicz, L.T.; Puylaert, M.; Vooght, P. De; Mestrum, R.; Heylen, R.; Roubos, E.W.; Vissers, K.C.P.

    2015-01-01

    BACKGROUND: Less than 50% of patients experience sufficient pain relief with current drug therapy for neuropathic pain. Minocycline shows promising results in rodent models of neuropathic pain but was not studied in humans with regard to the treatment of neuropathic pain. METHODS: In this

  17. EFEITO DE DIFERENTES TEMPERATURAS NA GERMINAÇÃO E CRESCIMENTO RADICULAR DE SEMENTES DE JATOBÁ-MIRIM ( Guibourtia hymenaefolia (Moric. J. Léonard

    Directory of Open Access Journals (Sweden)

    Ademir Kleber Morbeck de Oliveira

    2014-01-01

    Full Text Available Jatobá-Mirim species belongs to Fabaceae family and is distributed through Pantanal and Caatinga areas. Its wood is suitable for the construction and the manufacture of luxury furniture and is recommended for urban forestry and used to compose heterogeneous reforestation. Taking into account their potential use this work was developed with the objective of evaluating the effect of different temperatures on the germination rate and initial root growth of Jatobá-Mirim seeds. The seeds used in this experiment were harvested at ‘Cabeceira do Prata’ farm, located in ‘Jardim’ municipality, in Mato Grosso do Sul state, in September 2009. The material collected was transported to the Laboratory of Research on Bio-diversity and Environmental Systems at Anhanguera-Uniderp University where the research was developed. The seeds were submitted to constant temperatures of 20, 25, 30, 35 °C and alternated temperatures of 20- 30 and 25-35 °C, in six treatments, kept in germination cameras of B.O.D type. The obtained results show that the best temperatures for the seed germination are 30 o C (90%, 35 °C (97% and 25-35 °C (90%, statistically equal, certifying that those temperatures are more efficient to promote the germination. Taking into account the mean time for germination, germination speed index and dry matter production, constant temperatures of 30 and 35 o C are better and its results, statistically equal and higher than other treatments.

  18. APORTE E DECOMPOSIÇÃO DA SERAPILHEIRA E PRODUÇÃO DE BIOMASSA RADICULAR EM FLORESTAS COM DIFERENTES ESTÁGIOS SUCESSIONAIS EM PINHEIRAL, RJ

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Gabriel Menezes

    2010-01-01

    Full Text Available The aim of this study was to evaluate litter input and decomposition and root biomass of three forest fragments at different successional stages (advanced, medium and initial in Pinheiral Municipality, in the state of RJ, Brazil. To evaluate litter input, 10 conic collectors were installed in each fragment. The root biomass was quantified by monolith method in two periods (wet and dry at depths of 0-10, 10-20 and 20- 30 cm, and 10 samples were collected in each area. To evaluate the decomposition rate in each area, 12 litter bags were distributed. No significant differences were observed for litter input between the areas, but there was a tendency to increase litter input with successional evolution. No significant differences were observed for seasonal litter input between areas during the year, but there was a small increase in the months of July and August. At the advanced stage, litter input could be grouped into two periods: February to July, with lower values; and August to January, with higher values. The leaf fractions and reproductive material input were reduced, while branch and other fractions increased with succession. For litter decomposition, the intermediate stage showed the lowest decomposition constant (k (0.0038 g g -1day-1 and the highest half life time (182 days , followed by the initial (0044 g g -1day-1 and 154 days and advanced (0.0064 g g -1day-1 and 108 days stages. The root biomass in different areas and depths for both two periods studied showed higher values in the advanced stage, followed by the intermediate stage and the lowest values were found in the initial stage. The seasonal root biomass difference occurred mainly in the intermediate stage, with higher values in June.

  19. Comparison of Mast Cells and Inflammatory Cells within Periapical Lesions and Comparison of Degranulated Mast Cells Between Fibrous and Inflamed Area in Radicular Cysts: An Immunohistochemical Study.

    Science.gov (United States)

    Shiromany, Aseem; Sood, Rahul; Akifuddin, Syed; Sidhu, Gagandeep Kaur; Khan, Nadia; Singla, Kapil

    2014-12-01

    The role of mast cells as the key effector of allergic inflammation, anaphylactic inflammatory reactions and in the pathogenesis of chronic inflammation, is well-known. The present study is adopted to compare mast cells and inflammatory cells within periapical granuloma and cysts and localize the mast cells and quantify their number in the periapical cysts so as to propose a role of mast cells in the pathogenesis of this lesion. Biopsy specimens of 30 periapical lesions were stained with hematoxylin-eosin, and immunohistochemical Mast Cell Tryptase from Bio SB (IHC detection system kit) antibody. The tryptase positive mast cells and mononuclear inflammatory cells were counted in 10 consecutive high power fields (100X) using the binocular microscope from Motic attached to a computer with Motic Advanced Images 3.2 software. Comparative microscopic analysis indicated that periapical cyst shows more percentage of mast cells and less percentage of inflammatory cell than periapical granuloma (comparison of mean and standard deviation of total number of mast cells and inflammatory cells, mast cells 3.15±1.39 in the granuloma group and 4.43±1.91in the cyst group, inflammatory cells, 67.11±1.2 in the granuloma group and 52.66±0.8 in the cyst group). Numerous degranulated mast cells were observed in the fibrous wall than the inflammatory infiltrate of the periapical cysts. The mean and standard deviation of degranulated mast cells between the inflammatory and fibrous zone within the cyst group, being 0.95±1.10 and1.68±1.34 respectively. The values varied significantly between the two zones. The number of inflammatory cells in the cyst group is less than periapical granuloma and total number of mast cells in the cyst group is more as compared to periapical granuloma. The degranulated cells were quantified and they were higher in the fibrous area of the cysts than the inflammatory zone. This study could support the fact that the various mediators released on degranulation play a role in the connective tissue remodeling, chronicity and expansion of the periapical lesion.

  20. Tamaños radiculares y coronales de molares temporales en una muestra de niños españoles.

    OpenAIRE

    Caleya Zambrano, Antonia María

    2011-01-01

    La reabsorción de los dientes temporales ha sido poco estudiada a pesar de que es un proceso fisiológico de gran relevancia en el ser humano. El estudio de la rizolisis podría servir para determinar el estado de maduración del niño, y por tanto tener una aplicación útil en la práctica clínica y forense de la odontología. Por ello en este trabajo de investigación, nos hemos centrado en el estudio de la rizolisis de los dientes temporales. [ABSTRACT] The aim of this work is to study the rhii...

  1. Flowable resin and marginal gap on tooth third medial cavity involving enamel and radicular cementum: A SEM evaluation of two restoration techniques

    Directory of Open Access Journals (Sweden)

    G Lo Giudice

    2012-01-01

    Conclusion: The interposition of a low elastic modulus composite between the adhesive layer and the composite resin allows an improvement of the cementum-restoration interface by the means of a lower shrinkage stress during polymerization.

  2. Análise da Fragilidade do Core - Quando reconstruído com diferentes resinas e pinos pré-fabricados não metálicos

    OpenAIRE

    Ávilal, Gisseli Bertozzi; Dias, Sérgio Cândido; Ribeiro, José Carlos Rabelo; Gomes, Priscila Nogueira; Moysés, Marcos Ribeiro

    2016-01-01

    Para realização deste estudo vinte condutos artificiais foram construídos em blocos formados por esmalte e dentina, a partir de dentes bovinos. Dez pinos de fibra de vidro e dez de fibra de carbono foram cimentados nos condutos com cimento resinoso C&B. Empregou-se matriz de policarbonato para confecção do core em resina composta, perfazendo quatro grupos: Grupo (1) pino de fibra de vidro e core com resina composta Charisma; Grupo (2) pino de fibra de carbono e core com resina composta Charis...

  3. Remoção de smear layer de superfícies radiculares com aplicação tópica de EDTA com detergente. Análise em microscopia eletrônica de varredura

    OpenAIRE

    Sampaio, José Eduardo Cezar; Campos, Flávia Pavan; Pilatti, Gibson Luiz; Theodoro, Letícia Helena; Leite, Fábio Renato Manzolli

    2005-01-01

    The aim of the present study was to compare root surface smear layer removal following topical application of EDTA and EDTA-T (Texapon). Extracted human teeth had their cementum removed and were mechanically scaled. A total of 220 root specimens were obtained and were randomly assigned to the following groups: I-saline solution (control), II-EDTA; III-EDTA-T. Groups II and III specimens were assigned to different EDTA gel concentrations: 5%, 10%, 15%, 20% and 24%. Smear layer removal score wa...

  4. Estudo in vitro da eficácia do gel de EDTA 24% na remoção de smear layer e exposição de fibras colágenas da superfície radicular

    OpenAIRE

    Sousa, Cliciane Portela [UNESP

    2004-01-01

    O objetivo do presente estudo foi avaliar, por meio da Microscopia Eletrônica de Varredura (MEV), a eficácia do condicionamento químico com o gel de EDTA 24% na remoção de smear layer e exposição de fibras colágenas, avaliando-se diferentes marcas comerciais, modos e tempos de aplicação. Dentes humanos extraídos foram desgastados com fresa diamantada para remoção do cemento e raspados com curetas de Gracey 5-6 para formação de smear layer. Após o seccionamento dentário, as 225 amostras obtida...

  5. TEXTURA DE FEIJÃO-VAGEM (Phaseolus vulgaris L PROCESSADO OU NÃO: EFEITO DA APLICAÇÃO DE CONCENTRAÇÕES CRESCENTES DE CÁLCIO VIA ABSORÇÃO RADICULAR

    Directory of Open Access Journals (Sweden)

    Simone Palma FÁVARO

    1998-05-01

    Full Text Available Esta investigação teve como objetivo estudar o efeito do cultivo de feijão-vagem com doses crescentes de cálcio na textura das vagens antes e após processo de enlatamento. O experimento foi desenvolvido com a cultivar UEL 1, utilizando-se areia grossa como substrato. Os tratamentos constaram das seguintes concentrações de cálcio em solução nutritiva: 0, 75, 150 e 300 ppm. Foram determinados os teores de cálcio das vagens in natura, substâncias pécticas e textura das vagens in natura e processada. As concentrações de cálcio nas vagens aumentaram em paralelo à elevação dos níveis de cálcio adicionados à solução nutritiva. Os teores de pectina solúvel nas vagens in natura não diferiram entre os tratamentos. Houve um acréscimo da quantidade de pectina insolúvel em função do aumento das doses de cálcio. Após o processamento térmico ocorreu uma solubilização das pectinas. A maior concentração de pectina solúvel nas vagens enlatadas foi observada nas vagens cultivadas sem adição de cálcio na solução nutritiva. As medidas de textura demonstraram uma tendência de aumento de firmeza das vagens concomitante à elevação nos teores de cálcio antes e após o processo de enlatamento.This study aimed to investigate the effect of increasing calcium concentrations applied in nutrient solution in snap beans. Snap beans of cultivar UEL 1 were grown in coarse sand with nutrient solution supplying calcium at the following levels: 0, 75, 150 and 300 ppm. Fresh pods were analysed for calcium content. Fresh and processed pods were analysed for pectin content and texture. The calcium concentration in bean pods was increased when the calcium level in the nutrient solution was raised. There was no difference among the treatments for content of soluble pectins, however the content of insoluble pectins raised when calcium was added to the nutrient solution. An increasing in the content of soluble pectin was observed after the canning process and those pods grown without calcium in the solution presented the highest amounts of such materials. Higher calcium levels in the nutrient solutions resulted in firmer fresh and canned pods.

  6. Agudizaciones endodónticas al concluir diferentes variantes técnicas de tratamiento pulporadicular Incidence of endodontic acuteness when concluding the different technical variants in the pulp-radicular treatment

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    José Antonio Guerra Pando

    2009-12-01

    Full Text Available Las agudizaciones endodónticas constituyen eventos inflamatorios periapicales que se producen durante y después de concluida la terapéutica endodóntica, complicando y tornando más costosos dichos procederes. Para determinar su aparición e intensidad se realizó la presente investigación en la Clínica Estomatológica Docente Provincial "Antonio Briones Montoto" entre septiembre de 2007 y julio de 2008. El muestreo realizado fue de tipo opinático, constituido por 80 casos. Fueron divididos en 4 grupos de 20 casos, aplicándoseles diferentes esquemas de tratamiento. Los datos, recogidos en una planilla, se representaron en las tablas y gráficos en medidas resúmenes para variables cualitativas. Se empleó la estadística descriptiva: pruebas de 2 y K proporciones y la prueba no paramétrica Ji cuadrado. Se pudo constatar que el 17,5% de los casos tratados presentaron algún grado de agudización. El total de casos con agudizaciones resultó significativamente superior con la técnica estandarizada, no hubo diferencias en la aparición de las mismas en tratamientos en una o dos visitas, el mejor esquema de tratamiento empleado fue la técnica cérvico-apical en una sesión y los conductos abiertos al medio bucal el principal factor de riesgo asociado.Endodontic acuteness constitutes periapical inflammatory events that are produced during and after concluding the endodontic therapeutic, complicating and increasing the cost of the dental procedures. This research was aimed at determining their onset and intensity at "Antonio Briones Montoto" Dentist's Teaching Clinic from September 2007 to July 2008. The sampling was based on opinions and with 80 cases that were divided into 4 groups of 20 cases applying different treatment schedules. Data were collected in tables and graphics and in measures summed up to qualitative variables. A descriptive statistics was used: the two tests, K-proportions and the non-parametric chi-square test to compare the categories as well as the relation and homogeneity of the variables respectively. The total of the cases with acuteness resulted significantly higher with the standardized techniques, no differences in number or the intensity of the acuteness in the treatments in one and two sessions were observed, the best schedule of the treatment was the cervical-apical technique in a session.

  7. Remanente de la obturación endodóntica en dientes restaurados con retenedor Intra-radicular y su relación con la condición periapical post-tratamiento

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    Cristian David Gil García

    2016-07-01

    Full Text Available No hay evidencia clínica para afirmar que 4-5mm es la longitud aceptada del remanente de obturación endodóntica en dientes restaurados con retenedor intraradicular (RI. Objetivo: Estimar la relación entre el remanente del material de obturación endodóntica en dientes restaurados con RI y la condición periapical post-tratamiento bajo observación en imágenes tomográficas (CBCT. Métodos: Estudio observacional, descriptivo y de corte transversal. Se incluyen dientes permanentes, con obturación endodóntica óptima y restaurados con RI observados en periodos >1año. Se excluyen raíces con espacio visible entre el retenedor y el material obturador. Dos observadores entrenados clasificaron la variable dependiente: condición periapical en normalidad o en enfermedad. Para la variable explicativa se realizaron mediciones continuas del remanente. Análisis estadístico: Una Prueba-F, significativa al 5%, determinó la variabilidad inter-examinador. Se realizó un análisis en Componentes Principales (ACP para promediar mediciones del remanente de obturación. Un Modelo de Regresión Logística (MRL, con 95% confianza (IC, estimó la relación entre el remanente y el resultado del tratamiento. Resultados: 103 raíces, de 68 pacientes, conformaron la muestra. La Prueba-F no registró diferencias significativas inter-examinador al cuantificar la variable explicativa, (Vp-Coronal=0,767; Vp-Sagital=0,483; Vp-Axial=0,623 y la dependiente (Vp=0,487. Un MRL determinó la no asociación entre la longitud del remanente de obturación y la condición periapical post-tratamiento (OR=0.69, IC95%; 0.244-2.33, P=0.126. En el Corte sagital oblicuo se observó, al 10% de significancia, una relación inversamente proporcional por cada unidad de aumento en la longitud del remanente y la probabilidad de fracasar disminuye en 17.6% (OR=0.36, IC95%; 0.009-13.254, P=0.61. Conclusión: No existe relación entre la longitud del remanente y la condición periapical post-tratamiento.

  8. Remanente de la obturación endodóntica en dientes restaurados con retenedor Intra-radicular y su relación con la condición periapical post-tratamiento

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    Cristian David Gil García

    2016-07-01

    Full Text Available No hay evidencia clínica para afirmar que 4-5mm es la longitud aceptada del remanente de obturación endodóntica en dientes restaurados con retenedor intraradicular (RI. Objetivo: Estimar la relación entre el remanente del material de obturación endodóntica en dientes restaurados con RI y la condición periapical post-tratamiento bajo observación en imágenes tomográficas (CBCT. Métodos: Estudio observacional, descriptivo y de corte transversal. Se incluyen dientes permanentes, con obturación endodóntica óptima y restaurados con RI observados en periodos 1año. Se excluyen raíces con espacio visible entre el retenedor y el material obturador. Dos observadores entrenados clasificaron la variable dependiente: condición periapical en normalidad o en enfermedad. Para la variable explicativa se realizaron mediciones continuas del remanente. Análisis estadístico: Una Prueba-F, significativa al 5%, determinó la variabilidad inter-examinador. Se realizó un análisis en Componentes Principales (ACP para promediar mediciones del remanente de obturación. Un Modelo de Regresión Logística (MRL, con 95% confianza (IC, estimó la relación entre el remanente y el resultado del tratamiento. Resultados: 103 raíces, de 68 pacientes, conformaron la muestra. La Prueba-F no registró diferencias significativas inter-examinador al cuantificar la variable explicativa, (Vp-Coronal=0,767; Vp-Sagital=0,483; Vp-Axial=0,623 y la dependiente (Vp=0,487. Un MRL determinó la no asociación entre la longitud del remanente de obturación y la condición periapical post-tratamiento (OR=0.69, IC95%; 0.244-2.33, P=0.126. En el Corte sagital oblicuo se observó, al 10% de significancia, una relación inversamente proporcional por cada unidad de aumento en la longitud del remanente y la probabilidad de fracasar disminuye en 17.6% (OR=0.36, IC95%; 0.009-13.254, P=0.61. Conclusión: No existe relación entre la longitud del remanente y la condición periapical post-tratamiento.

  9. THERAPEUTIC APPROACH OF THE PAINFUL LUMBO-RADICULAR SYNDROME (SDLR IN THE LACU-SĂRAT RESORT AND THE ”SC FIZITER SRL” BRĂILA PHYSICAL REHABILITATION CENTRE

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    Viorica Lefter

    2010-06-01

    Full Text Available The high frequency of painful lumboradicular syndromes (SDLR is visible in the international specialised literature, bearing upon a diversity of specialisations (orthopedics, rheumatology, neurology, brain surgery, internal medicine, physiotherapy, social assistance services. Material and method .The present study took place in the interval 2007-2009 and comprised 2847 clinical cases of various types of painful lumbar syndromes (44. 43% out of a total of 6517 patients admitted in our service during the three years of the study,aiming at identifying differentiated nosological entities, presenting the clinical diagnosis criteria and singling out the treatment methodologies. The study proves that a careful and competent clinical examination as well as the accurate interpretation of paraclinical results may provide diagnosis elements allowing the isolation of various distinct nosological entities out of the totality of painful lumbar syndromes, which are subsequently enumerated establishing the percentual proportion to the 2 947 S.D.L.R. cases, as well as to the methodologies of kinetic approach of these entities. 1. The lumbar disc hernia (the multi- or single-level discogen lumboradicularsyndrome (phase III st. III 34.60%. 2. The ”lumbago” discogen lumbalgic syndrome (phase II 4.66%. 3. The myofascial syndrome 39.5%. 4. The facetal syndrome 1.53%. 5. The post-surgery HDL syndrome 12.85%. 6. The lumbalgic syndrome in generalised filrositis 4.25%. 7. Lumbar pains of other origins. The conclusions andresults of this research topic provide useful information, in view of a more certain diagnosis, accurate therapeutic orientation, adequate guiding of patients towards the suitable therapy, the kinetic approach of these entities, elements which may avoid prolonging the evolution, the useless increase of temporary work incapacity,applying precipitous treatments and patient’s iatrogenisation.

  10. Calagem e desenvolvimento radicular, nutrição e produção de laranja 'Valência' sobre porta-enxertos e sistemas de preparo do solo

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    Pedro Antonio Martins Auler

    2011-03-01

    Full Text Available O objetivo deste trabalho foi avaliar o efeito da calagem e de porta-enxertos sobre a quantidade de raízes, a nutrição e a produção de laranjeira 'Valência', em diferentes sistemas de preparo do solo. O experimento foi instalado em blocos ao acaso, com parcelas subsubdivididas e três repetições. As parcelas consistiram de dois sistemas de preparo do solo: convencional e com preparo mínimo. As subparcelas consistiram de níveis de calagem: com ou sem. As subsubparcelas consitiram de três porta-enxertos: limoeiro 'Cravo' (Citrus limonia, tangerineira 'Cleópatra' (Citrus reshni e Poncirus trifoliata. O tratamento com calagem recebeu 3 Mg ha-1 de calcário dolomítico, antes da implantação, e 1,65 Mg ha-1 quatro anos após o plantio. A produção foi avaliada durante 12 anos; o teor de Ca e Mg nas folhas foram avaliados 13 anos após a implantação do experimento; e as raízes e as características químicas do solo, 14 anos após a implantação. O preparo de solo, e sua interação com os demais fatores, não influenciou as variáveis avaliadas. O limoeiro 'Cravo' adaptou-se melhor à acidez, ao Al e a menores teores de Ca e Mg no solo, e não respondeu ao tratamento com calagem. Poncirus trifoliata apresentou a pior adaptação à acidez do solo, com aumentos de 126% na quantidade de raízes e de 26,4% na produção de frutos em razão da calagem.

  11. Estimativa do vigor de sementes de milho através da avaliação do sistema radicular de plântulas Estimate of seed vigor of corn through of evaluation of root system of seedlings

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    Patrícia Marluci da Conceição

    2012-04-01

    Full Text Available O comprimento da raiz primária das plântulas é usado como teste de vigor de sementes de poáceas, no entanto, além da raiz primária, existe um número variável de raízes seminais, as quais também poderiam ser usadas. Com este trabalho, objetivou-se a avaliação das raízes seminais de plântulas de milho como indicativo do vigor das sementes colhidas em diferentes épocas e submetidas a diferentes métodos de debulha. Para obter lotes de diferentes qualidades, as sementes da variedade de milho UFV-M100 Nativo foram colhidas em diferentes épocas (experimento 1 e submetidas a diferentes métodos de debulha (experimento 2. No experimento 1, as sementes foram colhidas em quatro épocas: quando atingiram o teor de água de 25% e 10, 20 e 30 dias depois da primeira colheita, em delineamento inteiramente casualizado, com quatro repetições. No experimento 2, as sementes foram colhidas com teor de água de 25% e submetidas à debulha manual, em debulhador estacionário manual e em debulhador estacionário, no delineamento inteiramente casualizado, com cinco repetições. No experimento 1, a massa seca das raízes seminais das plântulas diminuiu com o atraso da colheita e correlacionaram-se positivamente com o teste de emergência em leito de areia. No experimento 2, os métodos de debulha não influenciaram as características de raiz e não houve correlação entre elas e a emergência em leito de areia. A massa seca das raízes seminais pode diferenciar o vigor de lotes colhidos em diferentes épocas, mas nenhuma característica de raiz foi eficiente para diferenciar lotes de sementes com variações no dano mecânico.Length of primary root of seedlings is used as seed vigor test of Poaceae. However, besides primary root, there is a variable number of seminal roots, which could have been used. The objective of this work was to evaluate seminal root of corn seedlings as indicative of seed vigor of corn seeds harvested in different seasons and submitted to different threshing methods. To obtain lots with different qualities, UFV-M100 variety corn seeds were harvested in different seasons (experiment 1 and submitted to different threshing methods (experiment 2. In experiment 1, seeds were harvest in four seasons: when they reached water content of 25%, 10, 20 and 30 days later. In experiment 2, seed were harvested with water content of 25% and submitted to manual threshing, in manual stationary threshing and in stationary threshing. In experiment 1, mass of dry seminal roots of seedlings was reduced as harvest was delayed and they were positively correlated with emergency test in sand. In experiment 2, methods of threshing did not influence root traits and there was no correlation between them and emergence in sand. It is concluded that mass of dry seminal roots can differentiate vigor of lots harvested in different seasons, but no root trait was efficient to differentiate lots of seeds with mechanical damage variations.

  12. Root planing with Er:YAG laser X Gracey curette, a study in vitro in scanning electron microscopic study; Avaliacao em microscopia eletronica de varredura da superficie radicular, raspada e alisada com Er: YAG laser

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    Mello, Fabiano Augusto Sfier de

    2000-07-01

    The Er:YAG laser has been studied as a periodontal therapies, used to remove subgingival calculus and its bactericidal effects. The proposal of this study is to evaluate the effectiveness of the Er:YAG laser in root planing in comparison to the traditional method, not surgical. Six recently extracted due to the disease periodontal, were cut longitudinally, tends like this two half of the root. These half were separate in four groups. The first group is the natural tooth (group controls negative), the second group (group controls) was accomplished to root planing with Gracey curette. And in the third to Er:YAG laser with a contact tip, using a 45 deg angle in relation to the root; in the fourth group was scraped and planned with Er:YAG laser and complemented root planing with Gracey curette. The used energy was of 100 mJ (out put) and the frequency of 10 Hz accomplished with irrigation. The obtained results were similar in the groups 2 and 3 in comparison to the amount of smear-layer. In group 4 however, better result was obtained, because the image (SEM) was much more regular and with less amount of smear-layer. The conclusion of the work is that with the association of the laser technique and Gracey curette the results are superior to the conventional treatment. (author)

  13. EFICACIA DE LA PREPARACIÓN BIOMECÁNICA DE CONDUCTOS RADICULARES EN EL CRECIMIENTO MICROBIOLÓGICO EN PIEZAS DENTARIAS ANTERIORES CON NECROSIS PULPAR EN PACIENTES DE LA CLÍNICA ODONTOLÓGICA UANCV. JULIACA, PUNO. 2013

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    TAPIA CONDORI, RILDO PAÚL

    2015-01-01

    RESULTADOS TABLAS DE INFORMACIÓN GENERAL TABLAS QUE RESPONDEN A LOS OBJETIVOS MICROBIOLOGÍA ENDODÓNTICA VÍAS MICROBIANAS DE ACCESO TÚBULOS DENTINARIOS CAVIDAD ABIERTA MEMBRANA PERIODONTAL REQUERIMIENTOS PARA UN PATÓGENO ENDODÓNTICO POTENCIAL DE OXIDO-REDUCCIÓN ANTAGÓNICOS INTERMICROBIANOS NECROSIS PULPAR TIPOS DE NECROSIS PREPARACIÓN BIOMECÁNICA EN PIEZAS CON NECROSIS PULPAR INSTRUMENTOS CONVENCIONALES DE ACERO INOXIDABLE CARACTERÍSTICAS DE LAS LIMAS K DE ACERO INOXIDABLE PROPIEDADES FÍSICAS ...

  14. Morphological change study on root surfaces treated with curettes, sonic instruments or Er:YAG laser; Estudo in vitro da alteracao morfologica em superficie radicular tratada com curetas, aparelho ultrasonico ou com laser de Er:YAG

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    Guimaraes Filho, Arlindo Lopes

    2004-07-01

    Periodontal disease is caused by dental plaque and dental calculus on roots surfaces, specially on cervical areas. As dental plaque is the main cause and dental calculus a secondary one, it is practically impossible to separate one factor to the other one. In order to get periodontal tissue health it is necessary to eliminate dental plaque and calculus from root surfaces. In this sense, Er:YAG laser comes in as an excellent way to control periodontal disease, not only, by removing calculus and dental plaque but also for its bacteria reduction. The aim of this study is to compare, by S.E.M., root surfaces changing when they are treated with curettes and ultrasonic scaling or Er:YAG laser irradiation with two different energy levels of 60 mJ/pulse and 100 mJ/pulse and repetition tax of 10 Hz (in the display). It is also objective of this study to check a possible thermic damage to pulp tissue when the roots surfaces are irradiated with Er:YAG laser. We used for this study, five human dental roots, each one of them were cut into four samples, giving us a total of twenty samples, which were divided in five groups of four samples each one. The control group, we did not indicated any kind of treatment. The first group, the roots samples were scaled and planned with Gracey curettes 5/6 and 7/8. The second group, the roots samples were treated with ultrasonic instruments. The third group was irradiated with Er:YAG laser using 60 mJ/pulse , 10 Hz and energy density of 4 J/cm{sup 2} (approximated). The fourth group was irradiated with Er:YAG laser using 100 mJ/pulse, 10 Hz and energy density of 7 J/cm{sup 2} (approximated). The results analysis showed that roots scaling either with Gracey curettes or with ultrasonic instruments created smear layer covering roots surfaces; roots surfaces irradiated with Er:YAG laser showed few roughness in the third group; roots surfaces irradiated with Er:YAG laser showed no smear layer and the Er:YAG laser irradiation did not bring any thermic damage to pulp tissue. (author)

  15. Utilização de fósforo e características do sistema radicular e da parte aérea da planta de arroz Phosphorus utilization and characteristics of root and top of rice plant

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    Evaldo Pacheco Sant'ana

    2003-04-01

    Full Text Available A seleção de plantas mais eficientes no uso do fósforo é importante para tornar mais econômica a cultura do arroz e, assim, maximizar a produção de grãos. Conduziu-se este trabalho com o objetivo de estudar as inter-relações que possam ocorrer entre a eficiência no uso do P e outras características da planta do arroz (Oryza sativa L.. Foram avaliados 25 genótipos de terras altas cultivados em solo e in vitro, nos níveis baixo (0 mg de P dm-3 e alto (150 mg de P dm-3, em solo, e 17 mg de P dm-3 em meio de cultura. Em solo com nível baixo de P, a altura e o número de raízes da planta foram as caraterísticas que tiveram maior efeito direto na eficiência de utilização do P. No nível alto de P, o número de folhas e comprimento das raízes da planta foram as caraterísticas que tiveram maior efeito direto. In vitro, tanto no baixo como no alto nível de P, o teor de P acumulado e o volume da raiz foram as caraterísticas que tiveram maior efeito direto na eficiência de utilização do P.The improvement of rice plants (Oryza sativa L. for better P use efficiency is important to decrease the cost of rice production and maximizing yields. The objective of the present study was to understand the relationship among root and shoot characteristics with P use efficiency and other characteristics of the rice plant. Twenty-five genotypes of rice were grown in soil and in vitro under two level of P: low (0 mg of P dm-3 and high (150 mg of P dm-3 in soil, and 0 and 17 mg of P dm-3 in vitro. In soil at low level of P, the plant height and number of root per plant had the highest direct effect on P use efficiency. At high P level, the number of leaves per plant and root length had the highest direct effect on P use efficiency. In vitro, under all conditions of evaluation and levels of P, the level of P accumulation in the plant and root volume had the highest direct effect on P use efficiency.

  16. Otite MÃdia e Externa Bilateral em CÃes. Estudo Comparativo do Perfil MicrobiolÃgico e Susceptibilidade a Antimicrobianos das EspecÃeis Prevalentes

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    Lis Christina de Oliveira

    2004-01-01

    A otite resulta da inflamaÃÃo do conduto auditivo e representa 8-15% dos casos na prÃtica veterinÃria. Com o objetivo de delinear e comparar o perfil de isolamento de microrganismos a partir dos ouvidos mÃdio e externo de cÃes com otite foi realizado este estudo. No perÃodo de agosto/2003 a marÃo/2004 foram analisados 64 cÃes com otite externa e mÃdia associados e 50 cÃes com conduto auditivo hÃgido. A coleta de amostras foi realizada no Centro de Controle de Zoonoses de Fortaleza-CE e a anÃl...

  17. Nutrition and tissue regeneration from irradiated places: a study of cellular nutrition for the place submitted to radiotherapy; Nutrição e regeneração tecidual de locais irradiados: um estudo de nutrição celular para o local submetido ao tratamento radioterápico

    Energy Technology Data Exchange (ETDEWEB)

    Furtunato, Clayton R.V.; Romano, Déborah R.A., E-mail: claytonvallim@icloud.com, E-mail: deborah.alvarenga@unis.edu.br [Centro Universitário do Sul de Minas (UNIS), Varginha, MG (Brazil)

    2017-07-01

    This paper presents a physico-chemical study of the interaction of radiation with skin by ionizing radiation, presenting the hazards caused by the process. Throughout the work it is shown the importance of cellular nutrition during the period of radiotherapeutic treatment, besides having updated data on the application of natural substances for the regeneration of the place submitted to the treatment. Cancer is a problem of public health and according to data provided by the National Cancer Institute José Alencar Gomes da Silva (INCA), 420,310 new cases were registered in Brazil in 2016, of which 214,350 are among women (primary location 'breast') and 205,960 among male (primary location 'prostate'). Despite advances in technology, the hazards caused by ionizing radiation in contact with the skin are high degree of aggressiveness. Therefore, there is great importance in developing scientific studies in order to evaluate and minimize its damages during its application for radiotherapeutic purposes. The use of Aloe Vera (extracted from the slug) on the irradiated site is easily found among people undergoing radiation therapy. How is it about a stimulator of cellular and healing multiplication favors the tissue regeneration, becoming important its application, due to the radiodermatitis that appear during the treatment. Thus, the objective of this work is to present a bibliographic study of the mechanisms related to the interaction of radiation with matter, as well as the beneficial effects of the substance on irradiated living tissue and to expose such data in graph and tables to quantify its use.

  18. Prevenção e controle das seqüelas bucais em pacientes irradiados por tumores de cabeça e pescoço Prevention and control of sequels in the mouth of patients treated with radiation therapy for head and neck tumors

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    Maria de Fátima Aparecida Cardoso

    2005-04-01

    Full Text Available A cirurgia e a radioterapia são os principais métodos de tratamento das neoplasias de cabeça e pescoço. Dentre os efeitos colaterais resultantes da interação da radiação ionizante sobre os tecidos, temos dermatite, mucosite, xerostomia, candidíase, alteração do paladar, disfagia, cárie, trismo e osteorradionecrose. OBJETIVO: Avaliar a condição odontológica dos pacientes, através de protocolo que permita impedir ou minimizar os efeitos da radiação sobre os tecidos da cavidade bucal. MATERIAIS E MÉTODOS: Realizou-se acompanhamento odontológico, antes, durante e até 180 dias após a radioterapia, em 12 pacientes submetidos a cirurgia e radioterapia, ou radioterapia exclusiva. RESULTADOS: Efeitos como dermatite, mucosite, alteração do paladar e disfagia cresceram em proporção a partir da segunda semana de tratamento até o final das aplicações, decrescendo visivelmente quando do término, chegando próximos aos valores basais após 180 dias. Quanto à xerostomia, a redução ocorreu mais lentamente e com menor efetividade. Cárie, trismo e osteorradionecrose não foram observados durante o período de avaliação. CONCLUSÃO: O acompanhamento odontológico sistemático, junto com medidas preventivas como adequação bucal prévia, orientações sobre higienização, utilização de bochechos de água bicarbonatada, chá de camomila, aplicação tópica de flúor, contribuíram para promover melhores condições de restabelecimento em pacientes com neoplasia da região de cabeça e pescoço submetidos à radioterapia.Surgery and radiation therapy are de main treatments for head and neck cancer. The side effects of the interaction of ionizing radiation on the tissues include dermatitis, mucositis, xerostomia, candidiasis, dysgeusia, dysphagia, caries, trismus, osteoradionecrosis. OBJECTIVE: To assess dental condition of the patients using a protocol which allows avoiding or reducing the effects of radiation in the tissues of the oral cavity. MATERIALS AND METHODS: Dental follow-up was performed before, during and up to 180 days after radiation therapy in 12 patients submitted to surgery and radiation therapy or radiation therapy alone. RESULTS: The proportion of effects such as dermatitis, mucositis, dysgeusia, and dysphagia increased from the second week of the treatment until the end of the administrations. There was a clear decrease at the end of the treatment which was close to baseline values after 180 days. The reduction of xerostomia was slower and less effective. No case of caries, trismus, and osteoradionecrosis were observed during the assessment period. CONCLUSION: Regular dental follow-up associated with preventive measures such as prophylactic management of dental and oral diseases, adequate hygiene, mouth-washing with bicarbonate water and chamomile tea, and topic fluorine application contributed to improve the recovery conditions of patients with cancer of head and neck submitted to radiation therapy.

  19. Dissolution studies of natural analogues spent fuel and U(VI)-Silicon phases of and oxidative alteration process; Estudios de disolucion de analogos naturales de combustible nuclear irradiado y de fases de U(VI)-Silicio representativas de un proceso de alteracion oxidativa

    Energy Technology Data Exchange (ETDEWEB)

    Perez Morales, I

    2000-07-01

    In order to understand the long-term behavior of the nuclear spent fuel in geological repository conditions, we have performed dissolution studies with natural analogues to UO{sub 2} as well as with solid phases representatives of the oxidative alteration pathway of uranium dioxide, as observed in both natural environment and laboratory studies. In all cases, we have studied the influence of the bicarbonate concentration in the dissolution process, as a first approximation to the groundwater composition of a granitic environment, where carbonate is one of the most important complexing agents. As a natural analogue to the nuclear spent fuel some uraninite samples from the Oklo are deposit in Gabon, where chain fission reactions took place 2000 millions years ago, as well as a pitchblende sample from the mine Fe ore deposit, in Salamanca (spain) have been studied. The studies have been performed at 25 and 60 degree centigree and 60 degree centigree, and they have focussed on the determination of both the thermodynamic and the kinetic properties of the different samples studied, using batch and continuous experimental methodologies, respectively. (Author)

  20. Approach to the calculation of energy deposition in a container of fuel irradiated by the neutronic codes coupling fluid-dynamics; Aprpoximacion al calculo de la deposicion energetica en un contenedor de combustible irradiado mediante el acoplamiento de codigos neutronico fluido-dinamicos

    Energy Technology Data Exchange (ETDEWEB)

    Hueso, C.; Aleman, A.; Colomer, C.; Fabbri, M.; Martin, M.; Saellas, J.

    2013-07-01

    In this work identifies a possible area of improvement through the creation of a code of coupling between deposition energy codes which calculate neutron (MCNP), and data from heading into fluid dynamics (ANSYS-Fluent) or codes thermomechanical, called MAFACS (Monte Carlo ANSYS Fluent Automatic Coupling Software), being possible to so summarize the process by shortening the needs of computing time, increasing the precision of the results and therefore improving the design of the components.

  1. Radiation Resistance of Enzymes in Foods Irradiated Against Microbial Damage; Radioresistance des Enzymes dans les Denrees Alimentaires Irradiees pour les Proteger Contre les Alterations Dues a des Bacteries; Radiatsionnaya ustojchivost' ehnzimov v pishchevykh produktakh,obluchennykh protiv vrednogo vozdejstviya mikrobov; Radiorresistencia de las Enzimas en los Alimentos Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Vas, K. [Joint FAO/IAEA Division of Atomic Energy in Agriculture, International Atomic Energy Agency, Vienna (Austria)

    1966-11-15

    Most enzymes which play a role in the storage, processing and preservation of food are rather resistant to ionizing radiations. Generally speaking, their in situ radio-resistance is about an order of magnitude higher than that of the microorganisms causing spoilage or public health hazards. Thus, radiation doses adequate to microbiological stabilization, and at present considered just feasible economically, are insufficient to prevent enzymatic deterioration. Many attempts have already been made to inactivate enzymes in food by radiation but, judging by the relative failure of most of these efforts, much more background information seems to be necessary to deal with the problem on a more rational basis. To date, work in radiation enzymology has, to a large extent, been carried out in systems of medical interest, generally giving results not readily transposable to food systems. In the past (a) the mechanism of inactivation, as well as the roles of (b) enzyme concentration, (c) water activity of the medium, (d) oxygen concentration, (e) pH and (f) temperature, have been studied most intensively. This is reviewed in the paper. Since, in the majority of the reported experiments, the degree of purity of the enzyme has not been stated (or known, for that matter to the authors themselves), and since, on the other hand, radio-modifying substances are known to exert a decisive influence on the radiation inactivation of enzymes, it is felt that much more work is still needed on radio-protectors and radiation sensitizers in combination with highly-purified enzymes. The usual great radio-sensitivity of high-purity enzymes and the contrasting extreme resistance of enzymes in the tissues and in their unpurified extracts certainly indicate the need for finding the reasons for this difference in order to facilitate possibly a rational approach of controlling enzyme activity in food irradiation. In this way, perhaps some novel ''combination method'' can eventually be developed in addition to the combined methods which have already been put forward to control enzyme action, i.e. combining irradiation (a) with heating (b) with refrigeration and (c) with physiological methods (e.g. control of glycogenolysis) the status of all of which is briefly discussed in the paper. (author) [French] La plupart des enzymes qui jouent un role dans l'emmagasinage, la preparation et la conservation des denrees alimentaires possedent une certaine resistance aux rayonnements ionisants. D'une maniere generale, leur radioresistance in situ est superieure d'un ordre de grandeur environ a celle des micro-organismes qui causent des alterations ou presentent des risques pour la sante publique. Ainsi, les doses de rayonnements suffisantes pour assurer une stabilisation microbiologique - et considerees actuellement comme se situant a la limite de la rentabilite - sont insuffisantes pour empecher la deterioration par les enzymes. Maintes tentatives ont deja ete faites pour rendre inactifs, au moyen de rayonnements, les enzymes contenus dans les aliments; cependant, a en juger par l'echec relatif de la plupart d'entre elles, il semble qu'il faille reunir beaucoup plus de donnees de base pour s'attaquer au probleme d'une facon plus rationnelle. Jusqu'a present, les etudes relatives a la radioenzymologie-ont porte en grande partie sur des systemes presentant un interet medical, ce qui donnait generalement des resultats qui n'etaient pas aisement trans- posables sur le plan des denrees alimentaires. Dans le passe, on s'etait avant tout penche sur a) le mecanisme de l'inactivation, ainsi que sur le role de b) la concentration des enzymes, c) l'activite de l'eau contenue dans le milieu considere, d) la teneur en oxygene, e) le pH et f) la temperature. Le memoire passe en revue ces travaux. Etant donne que la plupart des communications relatives aux experiences effectuees n'indiquent pas le degre de purete de l'enzyme (d'ailleurs inconnu des auteurs eux-memes) et puisque, d'autre part, on sait que les substances radiomoueificatrices exercent une influence determinante sur la radioinactivation des enzymes, l'auteur estime qu'il faudrait entreprendre des etudes plus poussees sur les radioprotecteurs et les radiosensibilisateurs avec des enzymes fortement purifies. La grande radiosensibilite qui caracterise ordinairement les enzymes tres purs et, par contraste, l'extreme resistance des enzymes dans les tissus et dans leurs extraits non purifies, demontrent la necessite de determiner les raisons de cette difference, ce qui facilitera sans doute la mise au point d'une methode, rationnelle permettant de controler l'activite des enzymes dans le cadre de l'irradiation des aliments. De cette maniere, on pourrait peut-etre mettre au point une 'methode mixte' inedite, laquelle viendrait s'ajouter aux methodes combinees qui ont deja ete elaborees pour le controle de l'action des enzymes; en d'autres termes, on combinerait l'irradiation avec a) le traitement thermique, b) la refrigeration et c) les methodes physiologiques (par exemple, controle de la giycogenolyse). Le memoire fait brievement le point des applications de ces divers procedes. (author) [Spanish] La mayor parte de las enzimas que actuan durante el almacenamiento, la elaboracion y la conservacion de los alimentos son bastante resistentes a las radiaciones ionizantes. Por lo general, esa resistencia en su propio medio suele ser superior en un orden de magnitud a la de los microorganismos que causan la descomposicion o la alteracion de los alimentos. Debido a ello, dosis de irradiacion suficientes para la estabilizacion microbiologica y cuya aplicacion se considera actualmente apenas economica, no impiden la deterioracion causada por las enzimas. Se ha intentado ya muchas veces inactivar por irradiacion las enzimas de los alimentos, pero a juzgar por el escaso exito de la mayor parte de los ensayos efectuados, es necesario estudiar mucho mas a fondo los aspectos generales de la cuestion a fin de poder abordar el problema de una manera mas racional. Los estudios radioenzimologicos realizados hasta ahora tenian en su mayor parte finalidades medicas; no es facil extrapolar sus resultados a la conservacion de los alimentos. Las cuestiones mas estudiadas han sido: a) el mecanismo de la inactivacion y el papel que desempena, b) la concentracion de las enzimas, c) la actividad del agua en el medio, d) la concentracion de oxigeno, e) el pH y f) la temperatura. En la memoria se examinan todos estos puntos. Como en la mayoria de los experimentos publicados no se indica el grado de pureza de la enzima (desconocido a veces por los mismos autores) y como por otra parte se sabe que las sustancias radiomodificadoras ejercen una influencia decisiva sobre la radioinactivacion de las enzimas, el autor considera necesario reunir muchos mas datos sobre los agentes radioprotectores y radiosensibilizadores en relacion con enzimas de alta pureza. El contraste entre la elevada radiosensibilidad que suelen tener las enzimas de gran pureza y la extremada resistencia que se observa en ellas cuando se encuentran en los tejidos o en extractos sin purificar, indica la necesidad de averiguar las causas del fenomeno, lo que permitiria quiza enfocar mejor el problema de la inactivacion de esos agentes. Es posible que entonces se encuentre un ' metodo combinado' parecido a los que se han propuesto ya para reducir la accion de las enzimas: irradiacion combinada a) con un tratamiento termico, b) con la refrigeracion o c) con metodos fisiologicos (control de la glicogenolisis, por ejemplo). En la memoria se examina cada uno de estos metodos. (author) [Russian] Bol'shinstvo jenzimov, kotorye imejut opredelennoe znachenie pri hranenii, obrabotke i konservacii pishhevyh produktov, javljajutsja dovol'no stojkimi k ionizirujushhimu oblucheniju. Govorja voobshhe, ih radioustojchivost' in situ primerno na odin porjadok velichiny vyshe ustojchivorti mikroorganizmov, javljajushhihsja prichinoj porchi pishhevyh produktov ili pred- stavljav shhjh opasnost' dlja zdorov'ja naselenija. Takim obrazom, dozy obluchenija, dostatochnye dlja,mikrobiologicheskoj stabilizacii i rassmatrivaemye v nastojashhee vremja kak celesoobraznye s jekonomicheskoj tochki zrenija, ne dostatochny dlja predotvrashhenija jenzimaticheskoj porchi. Uzhe predprinjato mnogo popytok putem obluchenija sdelat' jenzimy v pishhevyh produktah neaktivnymi, no sudja po otnositel'nym neudacham bol'shinstva jetih popytok, mozhno polagat', chto dlja reshenija jetoj problemy na bolee racional'noj osnove neobhodimo imet' znachitel'no bol'she informacii. Do nastojashhego vremeni raboty v oblasti radiacionnoj jenzimologii provodilis' bol'shej chast'ju v oblastjah, predstavljajushhih interes dlja mediciny, i, kak pravilo, davali rezul'taty, kotorye nel'zja bylo neposredstvenno rasprostranjat' na sferu pishhevyh produktov. V proshlom naibolee intensivno izuchalis': 1) mehanizm inaktivacii, a takzhe ego rol'; 2) koncentracija jenzimov, 3) vodnaja aktivnost' sredy;4) kislorodnaja koncentracija; 5) pH i 6) temperatury. Doklad soderzhit obzor jetih rabot. Poskol'ku v bol'shinstve opublikovannyh rabot ne privodilos' dannyh otnositel'no stepeni chistoty jenzimov (ili oni ne byli izvestny samim avtoram) i t.k., s drugoj storony, izvestno, chto radioizmenjajushhie veshhestva okazyvajut opredeljajushhee vlijanie na inaktivaciju jenzimov s pomoshh'ju izluchenij, schitaetsja, chto neobhodimo provesti bol'shie raboty v oblasti radiacionno-zashhitnyh veshhestv i radiacionnyh sensibilizatorov v sochetanii s vysokoochishhennymi jenzimami. Obychno bol'shaja radiochuvstvitel'nost' vysokoochishhennyh jenzimov i kontrastirujushhaja s jetim chrezvychajnaja ustojchivost' jenzimov v tkanjah i v neochishhennyh jekstraktah ukazyvjut na neobhodimost' najti prichiny jetogo razlichija s tem, chtoby, po vozmozhnosti, vybrat' celesoobraznyj podhod dlja reshenija voprosa o kontrole za aktivnost'ju jenzimov pri obluchenii pishhevyh produktov. Takim putem so vremenem, vozmozhno, udastsja razrabotat' novyj 'kombinirovannyj metod' v dopolnenie k kombinirovannym metodam, kotorye uzhe byli predlozheny dlja kontrolja za dejstviem jenzimov, t.e. sochetanie obluchenija 1) s nagrevom, 2) s zamorazhivaniem i 3) s fiziologicheskimi metodami (naprimer, kontrol' v otnoshenii glikogenoliza), raboty s kotorymi kratko obsuzhdeny v doklade. (author)

  2. Activity evaluation from different native or irradiated with {sup 60} Co gamma rays snake venoms and their inhibitory effect on Leishmania (Leishmania) amazonensis; Avaliacao da atividade de diferentes venenos de serpentes, nativos ou irradiados, com radiacao gama de {sup 60} Co, quanto ao poder inibitorio do crescimento de Leishmania (Leishmania) amazonensis

    Energy Technology Data Exchange (ETDEWEB)

    Lourenco, Cecilia de Oliveira

    2000-07-01

    Cutaneous leishmaniasis is a disease, caused by Leishmania parasites, that occurs frequently in tropical and sub-tropical regions of the world. Skin lesions that could results in disfiguring aspect characterize it. The treatment is based on few drugs as antimony salts or pentamidine that are toxic with increasing resistance by the parasite. Alternative forms of disease treatment are in constant search, including natural components as snake venoms. Previous studies demonstrate that some components of snake venoms have an inhibitory effect against those parasites, including Leishmania species. Although snake venoms presented high toxicity, several methods have been described to detoxify most or some of their toxic components, with favorable results by the use of gamma irradiation. In this report we tested several native and irradiated snake venoms for inhibitory effect against Leishmania (Leishmania) amazonensis parasite and LLCMK{sub 2} mammalian cells, with enzymatic tests and electrophoresis. There are significant activity in Acanthophis antarcticus, Agkistrodon bilineatus, Bothrops moojeni, Bothrops jararaca, Hoplocephalus stephensi, Naja melanoleuca, Naja mossambica, Pseudechis australis, Pseudechis colletti, Pseudechis guttatus and Pseudechis porphyriacus, venom being inactive Pseudonaja textilis, Notechis ater niger, Notechis scutatus. Oxyuranus microlepidotus and Oxyuranus scutellatus venoms. After 2 KGy of {sup 60}Co irradiation most venom loses significantly their activity. Venoms with antileishmanial activity presented L-amino acid oxidase (L-AO) activity and showed common protein with a molecular weight about 60kDa in SDS-PAGE. These results indicate that L-AO activity in those venoms are probably related with antileishmanial effect. (author)

  3. New Methods and Facilities for the Measurement of Physical Properties of Reactor Components and Irradiated Materials; Nouveaux Procedes et Instruments de Mesure des Proprietes Physiques des Elements de Reacteur et des Matieres Irradiees; Novye metody i sredstva izmereniya fizicheskikh s vojstv komponentov reaktora i obluchennykh materialov; Nuevos Metodos y Equipos para Medir Propiedades Fisicas de Componentes de Reactor y de Materiales Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Foerster, F.; Mueller, P. [Institut Dr. Foerster, Reutlingen, Federal Republic of Germany (Germany)

    1965-09-15

    An instrument for the fully automatic measurement and recording of Young's modulus and the shear modulus and the damping capacity as a function of temperature and time is shown. The measurement of Young's modulus is produced by exciting specimens of various sizes in their natural frequency. The measurement of damping capacity occurs by free decay of the vibration or by the measurement of the half width of the resonance curve. Examples are given for measurements of the recovery after radiation damage and after plastic deformation and for the degree of graphitation. The detection of defects and density variations in graphite bars is proven. Furthermore, a method of investigation of the fastening of UO{sub 2} pellets in thin-walled austenitic tubes is explained, A special oven for the investigation of the elastic and inelastic behaviour of ''hot'' specimens at temperatures between 20 and 2000 Degree-Sign C is shown. The quality control of non-ferrous metals by means of eddy-current measurement of the electrical conductivity is discussed. An instrument is shown for the contactless measurement of the electrical conductivity of non-ferrous metals. The correlation between the electrical conductivity and the stress-strain behaviour of non-ferrous metals and alloys is explained. Special attention is paid to the measurement of small-size test pieces. A device for remote direct measurement in the ''hot'' zone of the reactor is shown. The dependence of the electrical conductivity upon the radiation dose is discussed. An instrument for the measurement of the permeability, the remanence and the coercive force as a function of the mechanical stress and the elastic and plastic strain and of the radiation dose is explained. Measurements of the variation of magnetic properties as a function of elastic stress and plastic deformation are shown. The effects of irradiation on the permeability and the coercive force are discussed. An instrument is shown for the quick measurement and direct reading of the permeability and stainless- steel components. The correlation between permeability and {Delta} ferrite content is explained. Measurements of the {Delta} ferrite percentage across welds in stainless-steel tubes and measurements of the {Delta} ferrite precipitations as a function of the plastic strain are discussed (hammer-forging of reactor fuel-elements). (author) [French] Les auteurs decrivent un instrument permettant de mesurer et d'enregistrer automatiquement le module de Young, le module de cisaillement et la capacite d'amortissement en fonction de la temperature et du temps. On mesure le module de Young en excitant des specimens de diverses dimensions a leur frequence propre. On mesure la capacite d'amortissement d'apres la libre decroissance de la vibration ou la largeur a mi-hauteur de la courbe de resonance. Le memoire donne des exemples de mesures de la guerison apres irradiation et apres deformation inelastique, ainsi que des exemples du degre de graphitisation. Les auteurs demontrent que l'on peut detecter des defauts et des variations de densite dans les banes de graphite. Ils expliquent, en outre, une methode d'etude de la fixation de pastilles d' UO{sub 2} sur des tubes en acier austenitique a parois minces. Us decrivent un four special pour l'etude du comportement elastique ou inelastique de specimens 'chauds ' a des temperatures variant entre 20 et 1000 Degree-Sign C. Les auteurs discutent le controle de la qualite de metaux non ferreux par mesure de ia conductivite electrique au moyen de courants de Foucault et decrivent un instrument permettant de mesurer sans aucun contact la conductivite electrique de metaux non ferreux. Ils expliquent la correlation entre la conductivite electrique et l'allongement sous l'effet des contraintes dans le cas de metaux et d'alliages non ferreux. Ils s'attachent particulierement a la mesure d'echantillons de petites dimensions. Ils decrivent un dispositif pour la mesure directe a distance dans la zone 'chaude ' du reacteur. Ils discutent la relation entre la conductivite electrique et la dose d'irradiation. Les auteurs decrivent un instrument de mesure de la permeabilite, de la remanence et de la force co- ercitive en fonction des contraintes mecaniques, de la deformation elastique et inelastique et de la dose d'irradiation. Ils donnent des mesures de la variation des proprietes magnetiques en fonction des contraintes elastiques et de la deformation inelastique. Ils etudient les effets de l'irradiation sur la permeabilite et sur la force coercitive. Les auteurs decrivent un instrument permettant la mesure rapide et la lecture directe de la permeabilite des elements en acier inoxydable. Ils expliquent la correlation entre la permeabilite et la teneur en ferrite {Delta}. Us discutent certaines mesures du pourcentage de ferrite {Delta} dans les soudures de tubes en acier inoxydable ainsi que certaines mesures de precipitation de ferrite {Delta} en fonction de la deformation inelastique (forgeage a la main d'elements combustibles pour reacteurs). (author) [Spanish] Se describe un intrumento para medir y registrar en forma totalmente automatica el modulo de Young, el modulodecorte y la capacidad de amortiguamiento, en funcion de la temperatura y el tiempo. El modulo de Young se determina excitando muestras de diversos tamanos con sus frecuencias naturales, mientras que la capacidad de amortiguamiento se mide en funcion de la libre atenuacion de la vibracion, o bien por la anchura media de la curva de resonancia. Se presentan ejemplos de medidas de la recuperacion despues de provocar danos por irradiaciones y deformaciones plasticas asf como grado de grafitacion. Se describe la deteccion de fallas y variaciones de densidad en barras de grafito. Se explica, ademas, un metodo para investigar la retencion de pastillas de UO{sub 2} en tubos austenfticos de pared delgada. Se describe un horno especial para estudiar el comportamiento elastico e inelastico de muestras radiactivas a temperaturas comprendidas entre 20 y 1 000 Degree-Sign C. Los autores discuten el control de calidad de metales no ferrosos por medida de la conductividad electrica aplicando corrientes de Foucault. Se describe un instrumento para medir la conductividad electrica de metales no ferrosos sin utilizar elementos en contacto. Se explica la correlacion entre la conductividad electrica y las caracteristicas de esfuerzo-deformacion de metales y aleaciones no ferrosos. Se presta especial atencion a la determinacion de estas propiedades en muestras pequenas. Se describe un dispositivo para medicion directa a distancia en la zona radiactiva del reactor. Se examina la relacion existente entre conductividad electrica y la dosis de radiacion. Se describe un instrumento para medir la permeabilidad, la remanencia y la fuerza coercitiva en funcion de la-solicitacion mecanica y la deformacion elastica y plastica, como tambien de la dosis de radiacion. Se expone un metodo para medir la variacion de las propiedades magneticas en funcion de la solicitacion elastica y la deformacion plastica. Se discuten los efectos de la irradiacion sobre la permeabilidad y la fuerza coercitiva. Se describe un instrumento para medicion rapida e indicacion directa de la permeabilidad de componentes de acero inoxidable. Se explica la correlacion entre permeabilidad y contenido de {Delta} - ferrita. Se exponen las mediciones del porcentaje de {Delta} - ferrita en soldaduras practicadas en tubos de acero inoxidable, y de las precipitaciones de {Delta}-ferrita en funcion de la deformacion plastica (forjado de los elementos combustibles). (author) [Russian] Opisan pribor dlja avtomaticheskogo izmerenija i registracii modulja Junga, modulja sdviga i kojefficienta zatuhanija kak funkcii temperatury i vremeni. Izmerenie modulja Junga proizvoditsja s pomoshh'ju vozbuzhdennyh obrazcov razlichnyh razmerov pri ih estestvennoj chastote. Izmerenie kojefficienta zatuhanija proizvoditsja po svobodnomu zatuhaniju kolebanija ili putem izmerenija polushiriny rezonansnoj krivoj. Privodjatsja primery izmerenij vosstanovlenija posle radiacionnogo.povrezhdenija i posle plasticheskoj deformacii, a takzhe primery stepeni gra- fitizacii. Opisyvajutsja obnaruzhenie defektov i kolebanija plotnosti grafitovyh blokov. Krome togo ob{sup j}asnjaetsja metod issledovanija zakreplenija tabletok iz UO{sub 2} v tonkostennyh austenitnyh trubkah. Opisyvaetsja special'naja pech' dlja izuchenija uprugogo i neuprugogo povedenija ''gorjachih'' obrazcov pri temperaturah ot 20 do 1000 Degree-Sign C. Obsuzhdaetsja kontrol' kachestva cvetnyh metallov putem izmerenija jelektroprovodnosti s pomoshh'ju vihrevyh tokov. Opisyvaetsja pribor dlja beskontaktnogo izmerenija jelektroprovodnosti cvetnyh metallov. Ob'jasnjaetsja sootnoshenie mezhdu jelektroprovodnost'ju i deformaciej pod naprjazheniem cvetnyh metallov i splavov. Osoboe vnimanie obrashhaetsja na izmerenie nebol'shih po razmeru obrazcov. Opisyvaetsja ustrojstvo dlja distancionnyh prjamyh izmerenij v ''gorjachej'' zone reaktora. Rassmatrivaetsja zavisimost' jelektroprovodnosti ot doz obluchenija. Opisyvaetsja pribor dlja izmerenija pronicaemosti, ostatochnoj magnitnoj indukcii i kojercitivnoj sily kak funkcii mehanicheskogo naprjazhenija, uprugoj i plasticheskoj deformacii i doz obluchenija. Opisyvajutsja izmerenija izmenenij magnitnyh svojstv kak funkcii uprugogo naprjazhenija i plasticheskoj deformacii. Rassmatrivaetsja vlijanie obluchenija na pronicaemost' i kojercitivnuju silu. Opisyvaetsja pribor dlja bystrogo izmerenija i neposredstvennogo opredelenija pronicaemosti komponentov iz nerzhavejushhej stali. Ob'jasnjaetsja sootnoshenie mezhdu pronicaemost'ju i soderzhaniem D ferrita. Rassmatrivajutsja rezul'taty izmerenij procentnogo soderzhanija D ferrita v svarnyh shvah trubok iz nerzhavejushhej stali i izmerenij osazhdenija D ferrita kak funkcii plasticheskoj deformacii (svobodnaja kovka toplivnyh jelementov reaktora). (author)

  4. Toxoplasma gondii vs ionizing radiation: cell and humoral immunity in spleen and gut of isogenic mice immunized with {sup 60}Co irradiated tachyzoites; Toxoplasma gondii vs radiacao ionizante: imunidade humoral e celular em baco e intestino de camundongos isogenicos imunizados com taquizoitos irradiados por cobalto 60

    Energy Technology Data Exchange (ETDEWEB)

    Galisteo, Junior, Andres Jimenez

    2008-07-01

    We are developing a vaccine for toxoplasmosis, using ionizing radiation as a tool. Here we analyzed the production of systemic and intestinal immunity, with protection studies, in several strains of inbred mice, by oral or parenteral route, using 255 Gy irradiated tachyzoites of T. gondii RH strain, with challenge with cysts of ME- 49 strain. C57Bl/6j, BALB/c and C57Bl/6j IFN-{gamma}{sup -/-} mice were immunized with 10{sup 7} irradiated tachyzoites, be parenteral or oral route. Those preparations, both by parenteral or oral routes, induced the production of specific IgG, mainly of the lgG2b subclass, and IgA immunoglobulins in serum, , as determined by ELISA. IgM production was negligible. Parenteral immunized mice showed higher IgG avidity maturation, as compared to oral immunized mice. Fecal excretion of IgG, IgA and IgM was detected in stools of immunized animals, more intense in oral immunized mice. In cellular immunity studies, induced by antigen, with detection of cytokine production by quantitative real-time PCR, there are a great production of IFN-y by spleen cells, with lower levels in Peyer patches cells, where there are a greater IL-2 production. Challenge studies in immunized mice demonstrated protection to infection in all used schedules, greater in BALB/c mice. C57Bl/6j IFN-{gamma} -{sup /-} mice, when immunized, showed no signs of disease and produced similar or greater levels of antibodies than wild type mice. They also excreted S-lgA and S-IgM in stools, but with low numbers of brain cysts in parenteral immunized mice, despite similar mortality. Our data points to a fair possibility of use of those irradiated parasites as an oral vaccine, devised to use for veterinary or wild felines vaccination, reducing the production of oocysts by those hosts and interrupting the chain transmission of human toxoplasmosis. (author)

  5. Evaluation of immunity and protection induced in experimental models by soluble extract of Toxoplasma gondii tachyzoites irradiated by {sup 60}Co; Avaliacao da imunidade e protecao induzida em modelos experimentais por extrato soluvel de taquizoitos de Toxoplasma gondii irradiado por {sup 60}Co

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Andrea da

    2013-07-01

    Toxoplasmosis affects 1/3 of the human population and only a vaccine for veterinary use. Gamma radiation alters the proteins making them more immunogenic by oxidation and better antigen presentation in the absence of adjuvants. Radiate soluble extract of RH strain tachyzoites of T. gondii (AgTg), and evaluate its use as a vaccine in BALB/c. Doses below 500Gy not affected and destroyed 2000Gy doses above extract, whereas animals immunized with irradiated extract at 1000, 1500 and 2000Gy had more of specific IgG avidity , compared to native AgTg (p<0,05) . AgTg 1500GY the immunized animals had increased proliferation of splenocytes, phenotyped as CD3+CD4+, CD3+CD8+ and B-lymphocytes immunized animals compared to the native AgTg . Animals immunized by AgTg 1500GY after challenge with strain ME- 49 cystogenic showed lower number of brain cysts and greater survival after challenge with virulent RH. Ionizing radiation in extracts of T. gondii increases the immune response and immune memory in the absence of adjuvants. (author)

  6. Optical absorption and thermoluminescence in Mg O, Mg O:Ni and Mg O:Li irradiated at room temperature; Absorcion optica y termoluminiscencia en MgO, MgO:Ni y MgO:Li irradiados a temperatura ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Delgado, L

    1984-07-01

    Optical absorption and thermoluminescence (TL) studies in Mg O, Mg O:Ni and Mg O:Li irradiated at room temperature are presented. In pure Mg O the thermal annihilation of Fe3+ by recombination with thermally released electrons at {approx} 90 and 175 degree centigree and the V center annealing by hole release up to 100 degree centigree cause the observed glow peaks at these temperatures. The TL excitation spectrum shows two maxima at 245 nm (electron center) and 288 nm (Fe3+). In Mg O:Ni X irradiation induces Fe{sup 2}+ {yields}- Fe{sup 3}+ and Ni{sup 2}+ {yields} Ni{sup 3}+ oxidations. Two TL emission bands centered at 110 degree centigree (red) and 80 o{sup C} (green) are assigned to electron release and their recombination at Fe{sup 3}+ and Ni{sup 3}+ respectively. In Mg O:Li two TL emission bands, one blue (430 nm) and the other red (730 nm) with excitation maxima at 245 nm (electron center) and 200 nm (hole center) respectively are observed. No V-center formation was detected in both Ni and Li doped samples. (Author) 42 refs.

  7. Fabrication and characterization of oxide type fluorite with controlled porosity to study the mechanical behaviour of the fuel irradiated in storage conditions; Fabricacion y caracterizacion de oxidos tipo fluorita con porosidad controlada para estudiar el comportamiento mecanico del combustible irradiado en condiciones de almacenamiento

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, S.; Borjas, S.; Gutierrez, L.; Bonales, L. J.; Rodriguez, N.; Cobo, J. M.; Torres, Y.; Cobos, J.

    2014-07-01

    The objective of this research is to get pills with distribution of porosity to simulate mechanical properties in the irradiated fuel resulting from own burnt of the material to produce the release of fission gases. (Author)

  8. Evaluation of the hydrogen peroxide and special colorant effects under irradiation by argon and diode laser on tooth-whitening in vitro; Avaliacao do efeito de corantes especiais e peroxido de hidrogenio irradiados por laser de argonio e laser de diodo no clareamento dental 'in vitro'

    Energy Technology Data Exchange (ETDEWEB)

    Gaspar, Jose Antonio

    2003-07-01

    The aim of this study is to determine if there is any interaction between special colorant found on bleaching agents that have 35 % of hydrogen peroxide on its composition, and argon or diode laser. The first part of the study was to characterize the extrinsic stain obtained through a staining solution containing products present on the day by day diet of the general population. Thirty-two inferior human extracted incisors, free of caries and without filling material were selected for the study. The laser devices employed were Argon laser (AccuCure 3000 TM - Lasermed), wave length 488 nm, with a 200 mW/cm{sup 2} for 30 seconds in continuos mode; and diode laser (L 808 Medical Laser - Lasering do Brasil), wave length 808 {+-} 10 nm, with 1,6 W/cm{sup 2} for 30 seconds in continuos mode. The application mode done by a scanning movement over the buccal surface. The bleaching agents used were: Opalescence Extra (OE) - Ultradent Products USA, hydrogen peroxide 35%, gel with Carotene to convert light into heat; Pola Office (PO) - SDI - USA single doses of hydrogen peroxide; Whiteness HP (WHP) - FGM - Brasil, hydrogen peroxide 35%; Opus White (OW) - Sharplan - Israel, hydrogen peroxide 35%. The temperature rise measurement was performed with a thermocouple model 120-202-AJ, Fenwal, inserted into the pulpar chamber. The bleaching material was applied on the tooth surface with 2 mm thickness and then the irradiation was perform. The thirty two teeth were randomized in four groups, two for each laser device. The obtain data demonstrated a superior performance of the Argon laser on tooth whitening and also better results concerning the temperature rise. The alteration on tooth coloration was verified through digital spectrophotometer (Shade-Eye EX - Shofu) and quantitative analyses showed statistical differences among the groups. The bleaching results for Argon laser combined with OE and WHP were superior for the other groups. The mean variation of the temperature rise obtained Argon laser were {<=} 5,6 deg C, and the values obtained with the Diode laser were {>=} 5,6 deg C. The results obtained lead to conclude that Argon laser is safer and more efficient than diode laser for tooth whitening procedures, and the best results achieved with the association of Argon laser irradiation to the bleaching agent OP and WHP. (author)

  9. Study of the behavior of the irradiated fuel in conditions of storage and atmosphere of Hz by means of electrochemical techniques; Estudio del comportamiento del combustible irradiado en condiciones de almacen y atmosfera de H{sub 2} mediante tecnicas electroquimicas

    Energy Technology Data Exchange (ETDEWEB)

    Nieto, J.; Iglesias, E.; Rodriguez, N.; Palomo, C.; Quinones, J.

    2011-07-01

    In studies of alteration (oxidation/dissolution) of the matrix of U0{sub 2} in groundwater, electrochemistry is a technique that allows information about corrosive processes of nuclear fuel in such conditions.

  10. Identification of irradiated food. I.- A test established on the in vitro culture of potato buds to identified the irradiated tubers; Identificacion de alimentos irradiados. I. Test basado en el cultivo de yemas in vitro para la identificacion de tuberculos de patatas irradiada

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Gonzalez, J; Garcia Collantes, M A

    1976-07-01

    A method based upon the in vitro culture of potato buds in a mineral medium is described, by which method tubers irradiated can be distinguished from tubers treated by refrigeration or inhibited by chemical agents. (Author) 9 refs.

  11. Correlation between the thermoluminescence and the F centre thermal stability in KBr, KI, NaCl and NaF irradiated at room temperature; Correlacion entre la termoluminiscencia y la estabilidad termica de los centros F en KBr, KI, NaCl y NaF irradiados a temperatura ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Mariani, D F

    1977-07-01

    Over the years several models have been proposed to explain the thermoluminescence in irradiated alkali halides. To verify these models, the thermoluminescence and the thermal stability of the F centres in KBr, K l, NaCl and NaF single crystals irradiated at room temperature with x or gamma rays have been studied. It has been concluded that both phenomena, the thermoluminescence and the F centre thermal stability are two different aspects of the same basic phenomenon, i.e. the recombination of mobile interstitials thermally released from traps with F centres (Ausin V. and Alvarez Rivas J.L. 1972). It has been found in some cases, that the H centres also play the role of recombination centres for interstitials. (Author) 42 refs.

  12. Effect of plastic straining on the F and M centres kinetics in {gamma}-irradiated NaCl; Efecto de la deformacion plastica sobre la Cinetica de Centro de color F y M en NaCl, irradiado con rayos {gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Agullo Lopez, F

    1966-07-01

    The effect of plastic straining on the room-temperature F and H growth curves in a {gamma}-radiation field has been analyzed. Cristal are strained after F-saturation is reached and then irradiation is continued. The new F growth curve consists of an initial fast growing stage due to additional vacancies created by deformation being turned into F centre, followed by a linear stage. Its slope is higher than that prior to straining. Also the role of straining on M centre thermal decay as well as on the F{yields}M reaction under F light, has been investigated. This reaction has been shown to preferentially occur where intense gliding has developed. (Author) 44 refs.

  13. Calibration of photographic dosemeters to evaluate the personal equivalent dose, Hp (10), irradiated by different radiation qualities and angles of incidence; Calibracao de dosimetros fotograficos para avaliar o equivalente de dose pessoal, Hp(10), irradiados por diferentes qualidades de radiacao e angulos de incidencia

    Energy Technology Data Exchange (ETDEWEB)

    Santoro, Christiana; Antonio Filho, Joao, E-mail: chsantoro@gmail.com, E-mail: jaf@ufpe.br [Universidade Federal de Pernambuco (DEN/UFPE), Recife, PE (Brazil). Departamento de Energia Nuclear; Santos, Marcus Aurelio P.; Goncalves Filho, Luiz Carlos, E-mail: masantos@cnen.gov.br, E-mail: l.filho@cnen.gov.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, Pe (Brazil)

    2013-07-01

    To use radiation detectors, should periodically perform tests and calibrations on instruments in order to verify its good functionality. One way to ascertain the quality of the instrument is to conduct a study of the angular dependence of the response of the radiation detectors. The photographic dosimetry has been used widely to quantify the radiation doses and to estimate levels of doses received by workers involved with X-and gamma radiation. Photographic dosimeters are used because provide wide range of exposure and good accuracy. One of the sources of error have been introduced by different irradiation geometries between calibration and measurement in radiation fields used in x-ray and gamma ray sources, therefore, there is a need for an evaluation of the sensitivity of dosimeters with variation of the angle of the incident beam. In this study were tested 190 photographic dosemeters in the Metrology Laboratory of the Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE) using the phantom H{sub p} (10), where the dosimeters are evaluated on the basis of the new operational magnitude for individual monitoring, the equivalent personal dose, H{sub p} (10). Angular dependence of these radiation detectors was studied in X radiation fields (in the range of 45 keV energy to 164 keV) and gamma radiation ({sup 137}Cs-662 keV e {sup 60}Co - 1250 keV)

  14. In vitro study of demineralization resistance and fluoride retention in dental enamel irradiated with Er,Cr: YSGG laser; Estudo in vitro da resistencia a desmineralizacao e da retencao de fluor em esmalte dental irradiado com laser de Er, Cr: YSGG

    Energy Technology Data Exchange (ETDEWEB)

    Ana, Patricia Aparecida da. E-mail: patriciadaana@yahoo.com.br

    2007-07-01

    This study aimed to establish irradiation conditions of Er,Cr:YSGG laser ({lambda} of 2.79 {mu}m) which could propitiate changes on human dental enamel and increase its resistance to demineralization, when associated or not with topical application of acidulated phosphate fluoride (APF). Fluences of 2,8 J/cm{sup 2}, 5,6 J/cm{sup 2} e 8,5 J/cm{sup 2} were selected; they were associated or not with previous application of a photo absorber (coal paste) and then APF was applied or not after laser irradiation. In a first step, the morphological findings, the surface temperatures, and the pupal temperatures were evaluated during laser irradiation. After that, the treated samples were submitted to a a ten-day pH-cycling model. After producing the incipient white-spots lesions, the following aspects were evaluated: the mineral loss, the loosely bound fluoride and the firmly bound fluoride. All the demineralizing and remineralizing pH-cycling solutions were evaluated with respect to their calcium (Ca), inorganic phosphorous (Pi) and fluoride (F{sup -}) concentrations. The data had their normality and homogeneity distribution statistically evaluated, and it was chosen an appropriated statistical test for each performed analysis according to the obtained results, considering 5% significant level. The fluences selected for this study created ablated surfaces; the fluences of 5.6 J/cm{sup 2} and 8.5 J/cm{sup 2} promoted increments in surface temperature above 110 deg C. The intrapupal temperature changes revealed that laser irradiation did not increase the pulpal temperatures above the critical threshold for induction of pulpitis. The coal paste did not promote any changes on surface morphology or in the intrapulpal temperature changes; however, this paste increased the surface temperatures during laser irradiation. Only laser irradiation at 8.5 J/cm{sup 2} was able to decrease the mineral loss when compared to the no-treatment group; although the association of coal paste + laser at 2.8 J/cm{sup 2} + APF application presented the lesser mineral loss of all treatment groups of this study, this value was not statistically different than those revealed in the FFA group (positive control). The analysis of loosely bound fluoride revealed that laser irradiation was able to retain the calcium fluoride formed after APF application due to the ablation process, while the analysis of firmly bound fluoride showed no differences in fluoroapatite quantities formed after laser irradiation when compared to the non-irradiated samples. The evaluation of demineralizing and remineralizing pH-cycling solutions evidenced no significant differences in calcium or inorganic phosphorous concentrations between lased or unlased samples; however, the fluoride determination exposed important differences on fluoride contents, which suggested that laser irradiation could induce a higher calcium fluoride formation. According to the results of this study, it was possible to conclude that the laser irradiation can propitiate, on enamel, higher loosely bound fluoride retention formed by topical application of fluoride; however, the association of treatments did not increased the effect obtained by APF application alone on enamel demineralization. (author)

  15. Nanostructured synthetic hydroxyapatite and dental enamel heated and irradiated by ER,CR:YSGG: characterized by FTIR and XRD; Hidroxiapatita sintetica nanoestruturada e esmalte dental aquecidos e irradiados por laser de Er,Cr:YSGG: caracterizacao por FTIR e por DRX

    Energy Technology Data Exchange (ETDEWEB)

    Rabelo Neto, Jose da Silva

    2009-07-01

    The study evaluate the physical changes and/or chemical that occurs in synthetic hydroxyapatite (HAP) and in enamel under action of thermal heating in oven or laser irradiation of Er,Cr:YSGG that may cause changes in its structure to make them more resistant to demineralization aiming the formation of dental caries. The synthetic HAP was produced by reaction of solutions of Ca(NO{sub 3}) and (NH{sub 4}){sub 2}HPO{sub 4} with controlled temperature and pH. The enamel powder was collected from the bovine teeth. Samples of powder enamel and synthetic HAP were subjected to thermal heating in oven at temperatures of 200 deg C, 400 deg C, 600 deg C, 800 deg C and 1000 deg C. For the laser irradiation of materials, were made with 5,79 J/cm{sup 2} of irradiation, 7,65 J/cm{sup 2}, 10,55 J/cm{sup 2} and 13,84 J/cm{sup 2} for synthetic HAP and 7,53 J/cm{sup 2}, 10,95 J/cm{sup 2}, and 13,74 J/cm{sup 2} for the enamel. The samples were evaluated by X-ray diffraction (XRD) for analysis of crystallographic phases and analysis by the Rietveld method, to determine their respective proportions in the material, as well as results of changes of the lattice unit cell parameters (axis-a, axis-c and volume), crystallites sizes and the occupation rate of sites of Ca and P atoms. The samples were analyzed by Fourier transform infrared spectroscopy (FTIR), which should compositional changes due to treatment related to carbonate, phosphate, adsorbed water and hydroxyl radicals content. The infrared was used to measure the surface temperature generated by the laser beam in the solid samples of enamel. Besides the major hydroxyapatite crystallographic phases, there was formations of octa calcium phosphate (OCP) and phase {beta} of tricalcium phosphate ({beta}-TCP ) in enamel heated at 800 deg C. There was reduction of the axis-a, volume and size of crystallites to the temperatures between 400 degree C and 600 deg C and also on laser irradiated samples. Above the temperature of 600 degree C it is observed the effect in the lattice parameters. The Ca/P relation in all the samples decreased. The enamel samples irradiated by 7,53 J/cm{sup 2} showed Ca/P equal to 1,6817 and by 13,74 J/cm{sup 2} Ca/P was 1,6831. Spectroscopy results showed that both the heating and laser irradiation cause changes primarily in the bands of carbonate, water adsorbed and hydroxyl and the crystallographic changes of the lattice may be correlated with changes in carbonate in the sites of hydroxyl and phosphates. The effects of heating in oven and laser irradiation causes reduction of carbonate content, and this effect was more evident in laser irradiated samples, there was also decreases in water and adsorbed hydroxyl contents. All these changes alter the properties of the material, as its solubility and therefore affect the demineralization process and can be useful for caries prevention as well as dental erosion prevention. (author)

  16. Evaluation of the hydrogen peroxide and special colorant effects under irradiation by argon and diode laser on tooth-whitening in vitro; Avaliacao do efeito de corantes especiais e peroxido de hidrogenio irradiados por laser de argonio e laser de diodo no clareamento dental 'in vitro'

    Energy Technology Data Exchange (ETDEWEB)

    Gaspar, Jose Antonio

    2003-07-01

    The aim of this study is to determine if there is any interaction between special colorant found on bleaching agents that have 35 % of hydrogen peroxide on its composition, and argon or diode laser. The first part of the study was to characterize the extrinsic stain obtained through a staining solution containing products present on the day by day diet of the general population. Thirty-two inferior human extracted incisors, free of caries and without filling material were selected for the study. The laser devices employed were Argon laser (AccuCure 3000 TM - Lasermed), wave length 488 nm, with a 200 mW/cm{sup 2} for 30 seconds in continuos mode; and diode laser (L 808 Medical Laser - Lasering do Brasil), wave length 808 {+-} 10 nm, with 1,6 W/cm{sup 2} for 30 seconds in continuos mode. The application mode done by a scanning movement over the buccal surface. The bleaching agents used were: Opalescence Extra (OE) - Ultradent Products USA, hydrogen peroxide 35%, gel with Carotene to convert light into heat; Pola Office (PO) - SDI - USA single doses of hydrogen peroxide; Whiteness HP (WHP) - FGM - Brasil, hydrogen peroxide 35%; Opus White (OW) - Sharplan - Israel, hydrogen peroxide 35%. The temperature rise measurement was performed with a thermocouple model 120-202-AJ, Fenwal, inserted into the pulpar chamber. The bleaching material was applied on the tooth surface with 2 mm thickness and then the irradiation was perform. The thirty two teeth were randomized in four groups, two for each laser device. The obtain data demonstrated a superior performance of the Argon laser on tooth whitening and also better results concerning the temperature rise. The alteration on tooth coloration was verified through digital spectrophotometer (Shade-Eye EX - Shofu) and quantitative analyses showed statistical differences among the groups. The bleaching results for Argon laser combined with OE and WHP were superior for the other groups. The mean variation of the temperature rise obtained Argon laser were {<=} 5,6 deg C, and the values obtained with the Diode laser were {>=} 5,6 deg C. The results obtained lead to conclude that Argon laser is safer and more efficient than diode laser for tooth whitening procedures, and the best results achieved with the association of Argon laser irradiation to the bleaching agent OP and WHP. (author)

  17. Tachyzoites of Toxoplasma gondii irradiated with 255 Gy induces decrease of cysts and cerebral lesions in mice challenged with cysts of ME-49; Taquizoitos de Toxoplasma gondii irradiados com 255 Gy induzem diminuicao de cistos e lesoes cerebrais em camundongos desafiados com cistos da cepa ME-49

    Energy Technology Data Exchange (ETDEWEB)

    Hiramoto, Roberto Mitsuyoshi; Galisteo Juniorm Andres Jimenez; Nascimento, Nanci do; Andrade Junior, Heitor Franco de [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil). Lab. de Biologia Molecular]. E-mail: rmhiramoto@bol.com.br; hfandrad@usp.br

    2002-07-01

    Toxoplasmosis can cause ocular lesions in normal individuals and several diseases in foetus, HIV infection and transplants. Toxoplasma gondii has a complex life cycle, involving cats, as the definitive host, and warm blood species, as intermediated hosts. The inf