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Sample records for camara pulpar devido

  1. Study in vitro of dental enamel irradiated with a high power diode laser operating at 960 nm: morphological analysis of post-irradiation dental surface and thermal effect analysis in pulp chamber due to laser application; Estudo in vitro do esmalte dental irradiado com laser de diodo de alta potencia em 960 nm: analise morfologica da superficie dental pos-irradiada e analise do comportamento termico na camara pulpar devido a aplicacao laser

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    Quinto Junior, Jose

    2001-07-01

    Objectives: This study examines the structural and thermal modifications induced in dental enamel under dye assisted diode laser irradiation. The aim of this study is to verify if this laser-assisted treatment is capable to modify the enamel surface by causing fusion of the enamel surface layer. At the same time, the pulpal temperature rise must be kept low enough in order not to cause pulpar necrosis. To achieve this target, it is necessary to determine suitable laser parameters. As is known, fusion of the enamel surface followed by re-solidification produce a more acid resistant layer. This surface treatment is being researched as a new method for caries prevention. Method and Materials: A series of fourteen identically prepared enamel samples of human teeth were irradiated with a high power diode laser operating at 960 nm and using fiber delivery. Prior to irradiation, a fine layer of cromophorous ink was applied to the enamel surface. In the first part of the experiment the best parameter for pulse duration was determined. In the second part of the experimental phase the same energy density was used but with different repetition rates. During irradiation we monitored the temperature rise in the pulpal cavity. The morphology of the treated samples was analysed under SEM. Results: The morphology of the treated samples showed a homogeneously re-solidified enamel layer. The results of the temperature analysis showed a decrease of the pulpal temperature rise with decreasing repetition rate. Conclusion: With the diode laser it is possible to cause morphological alterations of the enamel surface, which is known to increase the enamel resistance against acid attack, and still maintain the temperature rise in the pulpar chamber below damage threshold. (author)

  2. In vivo toxicity study of Lantana camara

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    Badakhshan Mahdi Pour; Sreenivasan Sasidharan

    2011-01-01

    Objective: To investigate the toxicity of methanol extract of various parts (Root, Stem, Leaf, Flower and Fruit) of Lantana camara(L. Camara) in Artemia salina. Methods: The methanol extracts of L. camara were tested for in vivo brine shrimp lethality assay. Results: All the tested extract exhibited very low toxicity on brine shrimp larva. The results showed that the root extract was the most toxic part of L. camara and may have potential as anticancer agent. Conclusions:Methanolic extract of L. camara is relatively safe on short-term exposure.

  3. Effects of Corynespora cassiicola on Lantana camara Efeitos de Corynespora cassiicola sobre Lantana camara

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    J.L. Passos

    2010-06-01

    Full Text Available The present study combines the examination of toxins produced by C. cassiicola and the effects of the fungus colonization on L. camara. C. cassiicola was cultivated on solid media and the crude extracts CAE and CE were produced. Both extracts were submitted to a seed germination and growth assay utilizing Physalis ixocarpa, Trifolium alexandrinum, Lolium multiflorum and Amaranthus hypochodriacus. The effect of the extracts on the ATP-synthesis in isolated spinach chloroplasts was also tested. Bioassay guided chromatographic fractionation identified the most active extract (CAE. From this extract ergosta-4,6,8(14,22-tetraen-3-one (C1 and fatty acids were isolated. The C1 compound reduce ATP synthesis in isolated spinach chloroplasts. The interference of fatty acids with ATP synthesis and also with weed growth provides one explanation of the phytogrowth-inhibitory properties of such fungal extracts. Histological observations involving fungus-plant interaction were made on L. camara plants inoculated with C. cassiicola conidia suspension. After inoculations, fragments of the leaf blades were prepared for observation by light and scanning electron microscopy. Fungal colonization of Lantana camara was typical of a necrotroph and penetration initiated a hypersensitive response. L. camara reacted to the pathogen penetration through thickening of the epidermis walls, cytoplasm granulation and a cicatrisation tissue.O presente estudo combina a investigação de toxinas produzidas por C. cassiicola e os efeitos da colonização do fungo sobre L. camara. C. cassiicola foi cultivado em meio sólido do qual se obtiveram os extratos brutos CAE e CE. Ambos os extratos foram submetidos aos testes de germinação e crescimento utilizando Physalis ixocarpa, Trifolium alexandrinum, Lolium multiflorum e Amaranthus hypochodriacus e sobre a síntese de ATP em cloroplastos isolados de espinafre. Os bioensaios direcionaram o fracionamento cromatográfico permitindo a

  4. Procesos pulpares y periapicales agudos como urgencias estomatológicas. Holguín 2009

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    Carmen Graña Dorta

    2009-01-01

    Full Text Available Aborda un estudio observacional descriptivo de corte transversal en días comprendidos en Mayo y Junio del 2009. Se desarrolló en las consultas de urgencias de las clínicas ¨Manuel Angulo Farrán¨ y ¨Mario Pozo Ochoa¨ de la Provincia Holguín. La muestra estuvo constituida por 70 pacientes que presentaron patologías pulpares y periapicales agudas. Se Planteó como objetivo determinar las patologías más frecuente según grupos de edad y sexo, identificar las causas principales de estas afecciones y evaluar la conducta diagnóstica y terapéutica inmediata en las consultas de urgencia. Como resultado arrojó una mayor afectación por patologías pulpares y periapicales agudas en el sexo femenino y en el grupo de edad de 35 a 59 años. La pulpitis reversible fue la patología pulpar más frecuente. La causa principal de afecciones fue la caries dental. Se evaluó de regular la conducta diagnóstica y terapéutica en las consultas de urgencias objeto de estudio.

  5. Inducción del cierre apical en el diente con necrosis pulpar y el ápice no formado

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    Canalda Sahli, Carlos

    1988-01-01

    Se efectúa una revisión del proceso de apicoformación en dientes con necrosis pulpar y ápice no formado, analizando el mecanismo de cierre apical inducido por el hidróxido de calcio y otras substancias, así como la histopatología del mismo.

  6. Lantana Camara and Butterfly Abundance in an Urban Landscape: Benefits for Conservation or Species Invasion?

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    Mukherjee Swarnali

    2015-12-01

    Full Text Available Urban landscapes host a range of diverse plants that, in turn, facilitate maintenance of different species of pollinators, including butterflies. In this context, the importance of Lantana camara, an invasive plant species, was assessed highlighting its role in maintenance of butterfly diversity, using Kolkata, India as a study area. Initial study revealed consistent presence of L. camara in both urban and rural sites with at least 25 different butterfly species association. The proportional relative load and the preferences of butterfly species for the each plant species were inclined towards L. camara. Irrespective of the sites, the diurnal and seasonal variations in the butterfly species abundance varied with the flowering pattern of L. camara. A positive correlation of different butterfly species with the flowering time and number of L. camara was for all the sites. The segregation of the L. camara associated butterfly species was made following discriminant function analysis using the extent of flower density of L. camara as explanatory variable. Despite being an invasive species, it is apparent that L. camara can be a prospective host plant that facilitates sustenance of butterflies in both urban and rural sites. Thus, existence of L. camara in urban gardens and forests may prove beneficial in sustenance of the butterflies.

  7. LANTANA CAMARA: OVERVIEW ON TOXIC TO POTENT MEDICINAL PROPERTIES

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    Dr. Milindmitra K Lonare et al

    2012-01-01

    Lantana camara is more popular as toxic weed rather than medicinal plant in most of the countries responsible for infesting pastures, grazing lands, orchards and crops like, tea, coffee, oil palm, coconut and cotton, and reduces the economic viability of the crops. This plant can grow in even in extreme harsh climatic conditions of tropical and sub-tropical areas and has become naturalized worldwide as an ornamental plant including India. The stem, root and leaves contain many of the bioactiv...

  8. LANTANA CAMARA: OVERVIEW ON TOXIC TO POTENT MEDICINAL PROPERTIES

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    Dr. Milindmitra K Lonare et al

    2012-09-01

    Full Text Available Lantana camara is more popular as toxic weed rather than medicinal plant in most of the countries responsible for infesting pastures, grazing lands, orchards and crops like, tea, coffee, oil palm, coconut and cotton, and reduces the economic viability of the crops. This plant can grow in even in extreme harsh climatic conditions of tropical and sub-tropical areas and has become naturalized worldwide as an ornamental plant including India. The stem, root and leaves contain many of the bioactive compounds responsible for various therapeutic applications such as cancers, chicken pox, measles, asthma, ulcers, swellings, eczema, tumors, high blood pressure, bilious fevers, catarrhal infections, tetanus, rheumatism, malaria, antiseptic, antispasmodic, carminative and diaphoretic. Besides this, it has some toxic effect by accidental ingestion among the livestock. Best alternate uses of West Indian Lantana started by the people, as it is difficult to eradicate such as household furniture like tables, chairs etc. are made from the stalks.. Present review indicating that Lantana camara is a versatile ornamental plant species having economic importance and can be promoted for diversified applications like medicinal and other potential uses.

  9. Antioxidant activity of methanol extracts of different parts of Lantana camara

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    Badakhshan Mahdi-Pour; Subramanion L Jothy; Lachimanan Yoga Latha; Yeng Chen; Sreenivasan Sasidharan

    2012-01-01

    Objective: To investigate the antioxidant activity of methanolic extracts of Lantana camara (L. camara) various parts and the determination of their total phenolics content. Methods:The extract was screened for possible antioxidant activities by free radical scavenging activity(DPPH), xanthine oxidase inhibition activity and Griess-Ilosvay method. Results:The results showed that all the plant parts possessed antioxidant properties including radical scavenging, xanthine oxidase inhibition and nitrites scavenging activities. The antioxidative activities were correlated with the total phenol. The leaves extract of L. camara was more effective than that of other parts. Conclusions: This study suggests that L. camara extracts exhibit great potential for antioxidant activity and may be useful for their nutritional and medicinal functions.

  10. Global Invasion of Lantana camara: Has the Climatic Niche Been Conserved across Continents?

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    Estefany Goncalves; Ileana Herrera; Milén Duarte; Bustamante, Ramiro O.; Margarita Lampo; Grisel Velásquez; Sharma, Gyan P.; Shaenandhoa García-Rangel

    2014-01-01

    Lantana camara, a native plant from tropical America, is considered one of the most harmful invasive species worldwide. Several studies have identified potentially invasible areas under scenarios of global change, on the assumption that niche is conserved during the invasion process. Recent studies, however, suggest that many invasive plants do not conserve their niches. Using Principal Components Analyses (PCA), we tested the hypothesis of niche conservatism for L. camara by comparing its na...

  11. Microbiología pulpar de dientes íntegros con lesiones apicales de origen idiopático

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    Patricia Rodríguez

    2008-03-01

    Full Text Available Introducción: Los cambios periapicales denominados lesiones, en dientes con integridad coronal completa y sin antecedentes de trauma, no presentan una etiología clara. Objetivo: Determinar la presencia de microorganismos en el tejido pulpar clarifica las causas de su muerte y el consiguiente daño a los tejidos periodontalesMateriales y métodos: Se seleccionaron 23 dientes, en personas con rangos de edad entre 10 y 39 años. Las muestras se tomaron con puntas de papel y limas Nº 0.8 (estériles, se transportaron en VMGA III, se procesaron en las siguientes 24 horas de tomada la muestra y se sembraron en agar brucella. Resultados: Los dientes más afectados fueron los centrales superiores 43.8%. De los 23 dientes estudiados, en 20 se observó crecimiento microbiológico. Se identificaron los siguientes microorganismos: Fusobacterium spp., 25%; Eubacte-rium spp., 15%; Peptostreptococcus spp., 10%; Campylobacter spp., 10%; bacilos entéricos gram negativos, 10%; Porphyromonas gingivalis, 10%; Prevotella intermedia, 5%; Eikenellia corrodens, 5%; Dialister pneumosintes, 5%; y levaduras en 5%. No hubo evidencias de crecimiento de Actinomyces actinomycetemcomitans, Tanerella forsythensis ni de estreptococo b hemolítico.Discusión y conclusiones: El tejido pulpar sano es estéril, la lesión sobre él causa inflamación degeneración, muerte pulpar y contaminación bacteriana. Los resultados en el presente estudio determinaron claramente la presencia de micro-organismos en lesiones apicales cerradas de origen endodóntico. De igual forma se evidencia que gran parte de los microorganismos que se encontraron son considerados periodontopatógenos lo que puede igualmente sugerir manejo compartido entre tratamiento endodóntico, periodontal y farmacológico.

  12. El Surco Palato Radicular: Su relación con patología pulpar y/o periodontal

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    R.M. Pulgar Encinas; B. Noguerol Rodriguez

    2000-01-01

    La presencia de anomalías morfológicas radiculares pueden actuar como factor predisponente para el acúmulo de placa y el desarrollo de patología periodontal y/o pulpar. Presentamos un caso clínico de surco palatoradicular en el 21, donde la presencia del surco ha sido el factor causal de una bolsa periodontal con defecto óseo aislado que finalmente condujo a la pérdida del diente. Se analiza la prevalencia, localizaciones, patogenia y la actitud terapéutica correcta ante la presencia de este ...

  13. Microbiología pulpar de dientes íntegros con lesiones apicales de origen idiopático

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    Patricia Rodríguez; Jesús Alberto Calero

    2008-01-01

    Introducción: Los cambios periapicales denominados lesiones, en dientes con integridad coronal completa y sin antecedentes de trauma, no presentan una etiología clara. Objetivo: Determinar la presencia de microorganismos en el tejido pulpar clarifica las causas de su muerte y el consiguiente daño a los tejidos periodontalesMateriales y métodos: Se seleccionaron 23 dientes, en personas con rangos de edad entre 10 y 39 años. Las muestras se tomaron con puntas de papel y limas Nº 0.8 (estériles)...

  14. Characterization of patient’s inflammatory pulpal diseases. Caracterización de pacientes con afecciones pulpares inflamatorias

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    Ana Isabel Palenque Guillemí

    2008-06-01

    Full Text Available Background: Pulpal diseases are the most common entities in the dentist emergency consultation. For a correct indication of the treatment, it is very important to establish an accurate diagnosis. Objective: to characterize carrier patients with inflammatory pulpal disease. Methods: a descriptive, prospective cases series study which included 222 patients who came to the dentistry emergency consultation in Area I health policlinic. Age, type of disease, cause, more implicated teeth in the disease, visits, and previous treatments were the variables included. Results: there was no difference at all regarding sex. The most affected group of age was from 35 to 59 years old. The inferior molars were the most affected teeth. The main cause was dental cavities. Obturation was the previous treatment more presented. 46% of the patients attended the dentist in more than one occasion with the same process. Acute irreversible pulpitis was the most predominant pulpal disease. Conclusions: The most common pulpal diseases in our milieu was the acute irreversible pulpitis among the ages 35 and 59 years old.
    Fundamento: Las afecciones pulpares son las enfermedades que más llevan a los pacientes a una consulta de urgencia estomatológica. En estos casos, para una correcta indicación de tratamiento, es de suma importancia el establecimiento de un diagnóstico preciso. Objetivo: Caracterizar pacientes portadores de afectaciones pulpares inflamatorias. Métodos: Estudio descriptivo, prospectivo de serie de casos que incluyó 222 pacientes que asistieron a consulta de urgencia estomatológica en la policlínica del Área 1. Se incluyeron las siguientes variables: edad, tipo de afectación, causa, dientes más afectados, visitas y tratamientos previos. Resultados: No hubo diferencias en cuanto al sexo, el

  15. Conservación de la vitalidad pulpar en un diente con pulpa expuesta por más de tres días

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    Elva Zayas Sánchez

    2014-08-01

    Full Text Available Se describe la importancia del correcto tratamiento de dientes traumatizados para conservar la vitalidad pulpar y lograr el cierre apical. La paciente de 8 años acudió a consulta con fractura complicada de corona del 21 a nivel cervical, la pulpa había estado expuesta por más de tres días también presentaba fractura no complicada de corona en el 11. Los Rx mostraron formación apical incompleta y ápices abierto en ambos dientes. Se realizó una técnica de amputación pulpar y reconstrucción del diente con un pin y resina fotopolimerizable en el 21 y recubrimiento pulpar indirecto en el 11. Después de un año de realizado el tratamiento se corroboró la conservación de la vitalidad pulpar y cierre apical en ambos dientes

  16. El Surco Palato Radicular: Su relación con patología pulpar y/o periodontal

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    R.M. Pulgar Encinas

    2000-09-01

    Full Text Available La presencia de anomalías morfológicas radiculares pueden actuar como factor predisponente para el acúmulo de placa y el desarrollo de patología periodontal y/o pulpar. Presentamos un caso clínico de surco palatoradicular en el 21, donde la presencia del surco ha sido el factor causal de una bolsa periodontal con defecto óseo aislado que finalmente condujo a la pérdida del diente. Se analiza la prevalencia, localizaciones, patogenia y la actitud terapéutica correcta ante la presencia de este tipo de anomalías, en base a los datos recogidos de la literatura.The presence of radicular anomalies may act as a predisposing factor for the accumulation of bacterial plaque and the development of local periodontal or pulpal disease. We present a case of palato-radicular groove in tooth Nº.21 that caused periodontal pocket and localized bone defect leading to loss of the tooth. We review the prevalence, localizations and pathogenesis of this dental abnormality as well as therapeutic approaches reported in the literature. The palato-radicular groove:relationship with pulpar and/or periodontal desease.

  17. Chemical Characterization and Trypanocidal, Leishmanicidal and Cytotoxicity Potential of Lantana camara L. (Verbenaceae Essential Oil

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    Luiz Marivando Barros

    2016-02-01

    Full Text Available Drug resistance in the treatment of neglected parasitic diseases, such as leishmaniasis and trypanosomiasis, has led to the search and development of alternative drugs from plant origins. In this context, the essential oil extracted by hydro-distillation from Lantana camara leaves was tested against Leishmania braziliensis and Trypanosoma cruzi. The results demonstrated that L. camara essential oil inhibited T. cruzi and L. braziliensis with IC50 of 201.94 μg/mL and 72.31 μg/mL, respectively. L. camara essential oil was found to be toxic to NCTC929 fibroblasts at 500 μg/mL (IC50 = 301.42 μg/mL. The composition of L. camara essential oil analyzed by gas chromatography–mass spectrometry (GC/MS revealed large amounts of (E-caryophyllene (23.75%, biciclogermacrene (15.80%, germacrene D (11.73%, terpinolene (6.1%, and sabinene (5.92%, which might be, at least in part, responsible for its activity. Taken together, our results suggest that L. camara essential oil may be an important source of therapeutic agents for the development of alternative drugs against parasitic diseases.

  18. Uso de novos materiais para o capeamento pulpar (hidroxiapatita - HAp e fosfato tricálcico - β-TCP) The use of new materials for pulp capping (hydroxyapatite - HAp and tricalcium phosphate - β-TCP)

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    C. S. Delfino; Ribeiro, C.; G. F. Vieira; A. H. A. Bressiani; M. L. Turbino

    2010-01-01

    O capeamento pulpar é uma medida importante e muito usada no cotidiano da prática odontológica e, quando realizado de forma consciente, baseado em um bom diagnóstico da condição pulpar no momento da exposição, pode prevenir o dente de sofrer uma intervenção endodôntica. Além do hidróxido de cálcio, outros materiais vêm sendo testados quanto a sua ação em promover o reparo pulpar pela formação de ponte de dentina, após capeamento pulpar direto. Uma das alternativas de materiais viáveis para o ...

  19. Phytochemical screening and antimicrobial activities of plant extract of Lantana camara.

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    Pradeep, B Vishwanath; Tejaswini, M; Nishal, P; Pardhu, G; Shylaja, S; Kumar, Kranthi Ch

    2013-05-01

    Natural products continue to play an important role in the discovery and development of new pharmaceuticals. Several chemical compounds have been extracted and identified from its species known as Lantana camara (L .camara). The present study was designed for phytochemical analysis of L. camara and extraction of bioactive compound by HPLC. This also included the antimicrobial activity of the bioactive compound obtained by crude extract and the column extract. The study showed the presence of the bioactive component parthenin extracted from the HPLC analysis at a peak height of 10.3807 and it was showing antimicrobial activity against E. coli, P. aeruginosa, B. subtilis and E. fecalis, crude (6.8 to 8.1 mm ) and column (4.0 to 6.2 mm) zone of inhibition. PMID:24617153

  20. The Chemical Diversity of Lantana camara: Analyses of Essential Oil Samples from Cuba, Nepal, and Yemen.

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    Satyal, Prabodh; Crouch, Rebecca A; Monzote, Lianet; Cos, Paul; Awadh Ali, Nasser A; Alhaj, Mehdi A; Setzer, William N

    2016-03-01

    The aerial parts of Lantana camara L. were collected from three different geographical locations: Artemisa (Cuba), Biratnagar (Nepal), and Sana'a (Yemen). The essential oils were obtained by hydrodistillation and analyzed by gas chromatography/mass spectrometry. A cluster analysis of 39 L. camara essential oil compositions revealed eight major chemotypes: β-caryophyllene, germacrene D, ar-curcumene/zingiberene, γ-curcumen-15-al/epi-β-bisabolol, (E)-nerolidol, davanone, eugenol/alloaromadendrene, and carvone. The sample from Cuba falls into the group dominated by (E)-nerolidol, the sample from Nepal is a davanone chemotype, and the sample from Yemen belongs to the β-caryophyllene chemotype. The chemical composition of L. camara oil plays a role in the biological activity; the β-caryophyllene and (E)-nerolidol chemotypes showed antimicrobial and cytotoxic activities. PMID:26917060

  1. Climate Warming May Facilitate Invasion of the Exotic Shrub Lantana camara

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    Zhang, Qiaoying; Zhang, Yunchun; Peng, Shaolin; Zobel, Kristjan

    2014-01-01

    Plant species show different responses to the elevated temperatures that are resulting from global climate change, depending on their ecological and physiological characteristics. The highly invasive shrub Lantana camara occurs between the latitudes of 35°N and 35°S. According to current and future climate scenarios predicted by the CLIMEX model, climatically suitable areas for L. camara are projected to contract globally, despite expansions in some areas. The objective of this study was to test those predictions, using a pot experiment in which branch cuttings were grown at three different temperatures (22°C, 26°C and 30°C). We hypothesized that warming would facilitate the invasiveness of L. camara. In response to rising temperatures, the total biomass of L. camara did increase. Plants allocated more biomass to stems and enlarged their leaves more at 26°C and 30°C, which promoted light capture and assimilation. They did not appear to be stressed by higher temperatures, in fact photosynthesis and assimilation were enhanced. Using lettuce (Lactuca sativa) as a receptor plant in a bioassay experiment, we also tested the phytotoxicity of L. camara leachate at different temperatures. All aqueous extracts from fresh leaves significantly inhibited the germination and seedling growth of lettuce, and the allelopathic effects became stronger with increasing temperature. Our results provide key evidence that elevated temperature led to significant increases in growth along with physiological and allelopathic effects, which together indicate that global warming facilitates the invasion of L. camara. PMID:25184224

  2. Climate warming may facilitate invasion of the exotic shrub Lantana camara.

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    Qiaoying Zhang

    Full Text Available Plant species show different responses to the elevated temperatures that are resulting from global climate change, depending on their ecological and physiological characteristics. The highly invasive shrub Lantana camara occurs between the latitudes of 35 °N and 35 °S. According to current and future climate scenarios predicted by the CLIMEX model, climatically suitable areas for L. camara are projected to contract globally, despite expansions in some areas. The objective of this study was to test those predictions, using a pot experiment in which branch cuttings were grown at three different temperatures (22 °C, 26 °C and 30 °C. We hypothesized that warming would facilitate the invasiveness of L. camara. In response to rising temperatures, the total biomass of L. camara did increase. Plants allocated more biomass to stems and enlarged their leaves more at 26 °C and 30 °C, which promoted light capture and assimilation. They did not appear to be stressed by higher temperatures, in fact photosynthesis and assimilation were enhanced. Using lettuce (Lactuca sativa as a receptor plant in a bioassay experiment, we also tested the phytotoxicity of L. camara leachate at different temperatures. All aqueous extracts from fresh leaves significantly inhibited the germination and seedling growth of lettuce, and the allelopathic effects became stronger with increasing temperature. Our results provide key evidence that elevated temperature led to significant increases in growth along with physiological and allelopathic effects, which together indicate that global warming facilitates the invasion of L. camara.

  3. Lantana camara berry for the synthesis of silver nanoparticles

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    Brajesh; Kumar; Kumari; Smita; Luis; Cumbal; Alexis; Debut

    2015-01-01

    Objective:To synthesize the silver nunoparticles(AgNPs) by reduction of silver ions into nano silver,using ripened berry extract of Lantana camara and evaluate its antioxidant activity against 1.1-diphenyl-2- picrylhydrazyl.Methods:The prepared AgNPs were characterized by visual,UV-visible spectrophotometer.dynamic light scattering and transmission electron microscopy with selected area electron diffraction.Results:Transmission electron microscopy and dynamic light scattering analysis confirmed the AgNPs are spherical and 75.2 nm average sized.Selected area electron diffraction analysis supports that the obtained nanoparticles were in crystalline form.In addition,the antioxidant efficacy of prepared AgNPs was found to be higher than berry extract against 1.1-diphenyl-2-picrylhydrazyl.Conclusions:From the results obtained it is suggested that surface modified AgNPs at lower concentration,showed higher antioxidant activity than berry extract against 1,1-diphenyl-2-picrylhydrazyl and could be used effectively in future ethno pharmacological concerns.

  4. Bioactivity of Lantana camara L. essential oil against Callosobruchus maculatus (Fabricius Bioactividad de aceite esencial de Lantana camara L. contra Callosobruchus maculatus (Fabricius

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    Nooshin Zandi-Sohani

    2012-12-01

    Full Text Available Lantana camara L. is a widespread plant species mostly native to subtropical and tropical regions of the world. In this study, insecticidal and repellent activities of L. camara essential oil were evaluated against Callosobruchus maculatus (Fabricius (Col: Bruchidae. Analysis of chemical composition by gas chromatography/mass spectrometry (GC/MS showed high amounts of sesquiterpenes, mainly α-humelene (23.3% and cis-caryophyllene (16.2%. The results showed that the essential oil of L. camara has strong repellent activity against adults of C. maculatus at all tested concentrations. After 2 and 4 h, 97.4 and 100% repellency was seen at highest concentrations of 0.4 μL cm-2, respectively. Moreover, the oil was found to be toxic to adults when applied by fumigation. Responses varied with the gender of insect and exposure time. The LC50 values were 282.7 and 187.9 μL L-1 for females and males, respectively. An increase in the exposure time from 3 to 24 h caused increasing in mortality from 23.6 to 100% in males and from 14.1 to 97.1% in females, at highest concentration (1160 μL L-1. According to these results, L. camara essential oil may be useful as an alternative for bean protection against C. maculatus.Lantana camara L. es una especie vegetal nativa de las regiones subtropicales y tropicales del mundo. En este estudio se evaluaron las actividades insecticida y repelente del aceite esencial de L. camara contra Callosobruchus maculatus (Fabricius. El análisis de la composición volátil de este aceite esencial mediante cromatografía de gas/ espectrometría de masa (GC/MS demostró la presencia de elevadas cantidades de sesquiterpenos, principalmente α-humuleno (23.3% y ci's-cariofileno (16.2%. Los resultados obtenidos demostraron que el aceite esencial de L. camara tiene una elevada actividad repelente contra los adultos de C. maculatus a todas las concentraciones ensayadas. Después de 2 y 4 h la concentración de 0.4 μL cm-2 causó 97

  5. Climate change and the potential distribution of an invasive shrub, Lantana camara L.

    Directory of Open Access Journals (Sweden)

    Subhashni Taylor

    Full Text Available The threat posed by invasive species, in particular weeds, to biodiversity may be exacerbated by climate change. Lantana camara L. (lantana is a woody shrub that is highly invasive in many countries of the world. It has a profound economic and environmental impact worldwide, including Australia. Knowledge of the likely potential distribution of this invasive species under current and future climate will be useful in planning better strategies to manage the invasion. A process-oriented niche model of L. camara was developed using CLIMEX to estimate its potential distribution under current and future climate scenarios. The model was calibrated using data from several knowledge domains, including phenological observations and geographic distribution records. The potential distribution of lantana under historical climate exceeded the current distribution in some areas of the world, notably Africa and Asia. Under future scenarios, the climatically suitable areas for L. camara globally were projected to contract. However, some areas were identified in North Africa, Europe and Australia that may become climatically suitable under future climates. In South Africa and China, its potential distribution could expand further inland. These results can inform strategic planning by biosecurity agencies, identifying areas to target for eradication or containment. Distribution maps of risk of potential invasion can be useful tools in public awareness campaigns, especially in countries that have been identified as becoming climatically suitable for L. camara under the future climate scenarios.

  6. Revisión de los factores de riesgo de afectación pulpar con la utilización del instrumental rotatorio

    OpenAIRE

    Giner Tarrida, Lluís; Gallego, B.; Cortada Colomer, Miquel; Llombart Jaques, Daniel

    1992-01-01

    En esta comunicación se efectúa una revisión de la bibliografía acerca de los factores que influyen en la respuesta pulpar en los tratamientos odontológicos que conllevan la utilización de instrumental rotatorio diamantado así como una experiencia de laboratorio comparando la eficacia del refrigerante de spray aire-agua y el de aire solo.

  7. Green synthesis and characterization of silver nanoparticles using Lantana camara leaf extract

    Energy Technology Data Exchange (ETDEWEB)

    Ajitha, B., E-mail: ajithabondu@gmail.com [Department of Physics, Sri Venkateswara University, Tirupati 517502 (India); Ashok Kumar Reddy, Y. [Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Sreedhara Reddy, P. [Department of Physics, Sri Venkateswara University, Tirupati 517502 (India)

    2015-04-01

    In this work, we have investigated on Lantana camara mediated silver nanoparticles (AgNPs) with different leaf extract (LE) quantity for the evaluation of efficient bactericidal activity. The AgNPs were prepared by simple, capable, eco-friendly and biosynthesis method using L. camara LE. This method allowed the synthesis of crystalline nanoparticles, which was confirmed by X-ray diffraction (XRD) and selected area electron diffraction (SAED) patterns. The X-ray photoelectron spectroscopy (XPS) analysis confirmed the formation of metallic silver and elucidates the surface state composition of AgNPs. UV–vis spectra of AgNPs and visual perception of brownish yellow color from colorless reaction mixture confirmed the AgNP formation. Involvement of functional groups of L. camara leaf extract in the reduction and capping process of nanoparticles was well displayed in Fourier transform infrared spectroscopy (FTIR). Decrement of particle size with an increment of leaf extract volume was evident in AFM, TEM images and also through a blue shift in the UV–vis spectra. The rate of formation and size of AgNPs were dependent on LE quantity. Meanwhile, these AgNPs exhibited effective antibacterial activity with the decrement of particle size against all tested bacterial cultures. - Highlights: • Monodispersed AgNPs are synthesized using L. camara leaf extract. • The higher the L. camara content, the smaller the particle size. • Green synthesized AgNPs are found to be photoluminescent. • Size dependence of antibacterial activity is reported. • The nanoparticle stability is improved by leaf extract quantity.

  8. MTA and calcium hydroxide for pulp capping MTA e hidróxido de cálcio para proteção pulpar direta

    Directory of Open Access Journals (Sweden)

    Alexandra Mussolino de Queiroz

    2005-06-01

    Full Text Available This study evaluated the biocompatibility of mineral trioxide aggregate (MTA after direct capping of exposed pulp tissue in dog's teeth. Class I cavities were prepared in 26 teeth from 3 adult dogs. MTA was applied over the exposed pulp in 13 teeth and paste of calcium hydroxide plus distilled water (control was applied in the remaining 13 teeth. After 90 days, the animals were killed; the maxilla and mandible were dissected and sectioned to obtain individual roots. The samples were processed histologically. The pulp and periapical response observed with the use of MTA was similar to that of calcium hydroxide paste. In all specimens, there was a dentin bridge obliterating the exposure, an intact odontoblastic layer, no inflammatory cells, normal connective pulp tissue, normal apical and periapical regions and no bone tissue changes. Similar to calcium hydroxide, MTA presented excellent response when used for direct pulp capping.O objetivo deste trabalho foi avaliar a biocompatibilidade do agregado de trióxido mineral (MTA, após proteção pulpar direta em dentes de cães. Foram preparadas cavidades de Classe I, em 26 dentes de 3 cães adultos. O MTA foi aplicado sobre 13 dentes e a pasta de hidróxido de cálcio (grupo controle foi aplicada sobre os 13 dentes remanescentes. Após 90 dias, os animais foram mortos, a maxila e a mandíbula foram dissecadas e os dentes foram seccionados para obtenção de raízes individualizadas. Os espécimes foram processados histologicamente. A resposta do tecido pulpar e periapical foi semelhante para o MTA e o hidróxido de cálcio. Em todos os espécimes havia ponte de dentina obliterando o local da exposição pulpar, camada odontoblástica íntegra, ausência de células inflamatórias, tecido pulpar normal, e ausência de alterações na região periapical e óssea. Da mesma maneira que o hidróxido de cálcio, o MTA apresentou excelente biocompatibilidade quando usado para proteção pulpar direta.

  9. Evaluation of the temperature rise in pulp chamber during class V preparation with Er:YAG laser; Avaliacao da temperatura na camara pulpar durante preparo classe V com laser de Erbio:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Picinini, Leonardo Santos

    2001-07-01

    One of the major concerns regarding laser irradiation in the dentistry field is the overheating in dental tissue, specially pulpal tissue. A temperature raise over 5.5 deg C is considered to be harmful to its vitality. The current study evaluated the temperature increase in the pulp chamber, during class V preparation, performed with the laser Er:YAG in 36 bovine incisive extracted teeth. The samples were eroded on the outer side of the vestibular wall to obtain the dentinal thickness of 2.0 mm (group I), 1.0 mm (group II) and 0.5 mm (group III). Thermocouples were fixed to the inner part of the vestibular wall using thermal paste, through the palatine opening of the samples. Class V cavities were prepared in the vestibular side only in 1 mm{sup 2} thick dentins. Irradiation parameters used were: 500 mJ/10 Hz, 850 mJ/10 Hz and 1 000 mJ/10 Hz for all the groups. The results were processed by a microcomputer. This study showed that the temperature increased into the pulpal cavity reached around 3 deg C for the groups I (2,0 mm thick dentine) and II (1.0 mm thick dentine). In the group III (0.5 mm thick) temperature was around 5.5 deg C. Thus, the parameters used for cavity preparation, using Er:YAG laser, were safe in relation to the temperature raise for dentinal thickness of 1,0 and 2,0 mm; in 0.5 mm thick dentins, temperature increase reached 5.5 deg C and an appropriate correction in the laser parameters was necessary. (author)

  10. Evaluation in vitro of pulpal chamber temperature of deciduous teeth during Er:YAG laser application; Avaliacao in vitro da temperatura na camara pulpar de dentes deciduos durante aplicacao do laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Sznajder, Alexandre Joseph

    2001-07-01

    The Er:YAG laser technology has been thoroughly studied, since its invention, and has been increasingly recommended in Dentistry. However, its use in deciduous teeth has not been deserving the equivalent attention to its counterpart in permanent teeth, despite of the deciduous teething occur in a phase of life in which it has a far more importance than its substitutes. For that reason, this study aims to identify the suitable parameters to the clinic procedures in deciduous teeth, using the already established protocols in permanent teeth. The study was lead in a way to resemble the most the conditions of the clinical use of the laser. Five groups were analyzed using different energy densities and repetition rates. Each group was composed of 10 first superior right deciduous molars randomly selected. The energy densities and repetition rates used for each group were: 60 mJ 15 Hz, 250 mJ 2 Hz, 250 mJ 15 Hz, 400 mJ 6 Hz and 500 mJ 2 Hz. The results obtained allowed us to conclude that the use of the Er:YAG laser in Odontopediatrics is effective, safe and secure and the main reason for its recommendation is the low transfer of heat to the adjacent tissues of the applied surfaces. (author)

  11. Vitalidade pulpar em dentes portadores de brackets ortodônticos: apresentação de uma técnica = Pulp vitality test on teeth having orthodontics brackets: technique presentation

    Directory of Open Access Journals (Sweden)

    Barletta, Fernando Branco

    2007-01-01

    Full Text Available O presente trabalho teve como objetivo avaliar a confiabilidade do teste de vitalidade pulpar com o gás refrigerante tetrafluoretano (CS 68 em dentes portadores de brackets ortodônticos. Foram selecionados 37 pacientes de clínica privada, com faixa etária entre 12 e 60 anos de idade. O teste de vitalidade pulpar foi realizado na face palatina ou lingual, na região de terço médio dos dentes, abaixo do cíngulo, nos grupos dentários dos incisivos, caninos e pré-molares superiores e inferiores, totalizando 402 dentes. Quando a resposta de sensibilidade pulpar era negativa ao teste, o mesmo era repetido; confirmando-se o resultado como negativo, realizavase uma tomada radiográfica pela técnica periapical do dente em questão. Os resultados evidenciaram 4 elementos dentários com resposta negativa ao teste de vitalidade pulpar, sendo 3 pré-molares e um incisivo central. A resposta dos demais foi positiva ao teste. Diante dos resultados, verificou-se que a aplicação do teste de vitalidade pulpar pela face palatina em pacientes portadores de brackets ortodônticos constitui-se em uma alternativa segura e confiável

  12. Estudio sobre diferentes protocolos de irrigación y medicación intraconducto para la revascularización pulpar en dientes inmaduros y necróticos de perros beagle

    OpenAIRE

    Rodríguez Benítez, María Soledad

    2015-01-01

    La Endodoncia una de las técnicas más utilizadas en el día a día de la clínica dental, que consiste en la remoción del tejido pulpar inflamado y/o necrótico, la instrumentación mecánica, desinfección química del sistema de conductos radiculares, y su posterior obturación y sellado. La eliminación del tejido pulpar conlleva, pérdida de la sensibilidad pulpar, anulación de la capacidad de producir dentina y detención del desarrollo radicular. Por ello, se deben realizar todos los esfuerzo...

  13. Anxiolytic potential of ursolic acid derivative-a stearoyl glucoside isolated from Lantana camara L. (verbanaceae)

    Institute of Scientific and Technical Information of China (English)

    Imran Kazmi; Muhammad Afzal; Babar Ali; Zoheir A Damanhouri; Aftab Ahmaol; Firoz Anwar

    2013-01-01

    Objective: To investigate the anxiolytic activity of newly isolated compound by our lab called ursolic acid stearoyl glucoside (UASG) from the leaves of Lantana camara (L. camara). Methods:Column chromatography was used to isolate UASG. Anxiolytic potential was experimentally proved and demonstrated through Elevated plus-maze, Open field and light and dark test.Results:The UASG showed marked increased in time spent (%) and number of frequent movements made by animals in open arm of elevated plus-maze apparatus. In light and dark model, UASG produced marked increase in time spent by animal, number of crossing and reduced duration of immobility in light box. Conclusions: UASG showed significant increase in number of rearing, assisted rearing and number of square crossed in open field established test model. UASG showed its anxiolytic effect in dose dependent manner.

  14. Investigation of wound healing activity of Lantana camara L. in Sprague dawley rats using a burn wound model

    Directory of Open Access Journals (Sweden)

    B S Nayak

    2008-03-01

    Full Text Available Summary: Lantana camara is used in herbal medicine for the treatment of skin itches, as an antiseptic for wounds, and externally for leprosy and scabies. The objective of our study is to investigate burn wound healing activity of the leaf extract of L.camara in rats. The animals were divided into two groups of 6 each. The test group animals were treated with the ethanol extract of L. camara (100 mg kg-1 day-1 topically and the control group animals were left untreated. Healing was assessed by the rate of wound contraction, period of epithelialization. Antimicrobial activities of the extract against the specific microorganisms were assessed. The extract showed antimicrobial activity against Staphylococcus aureus, Klebsiella Pneumoniae and E.coli. Extract treated wounds were healed in about 21 days which is not distinct from the controls. Our data suggest that L.camara has antimicrobial activity but not wound healing promoting activity on burn wound.   Industrial relevance: Extensive work has been done on the L. camara and demonstrated the antimicrobial and fungicidal activity of its chemical constituents. Lantana oil is used for the treatment of skin itches and as an antiseptic for wounds. It has been used in folk medicine for the treatment of cancers, chicken pox, measles, ulcers, swellings, eczema. Our earlier work showed the healing activity on excision wound model. However, there is no data to support the wound healing activity of L. camara on burn wound. Hence, we have conducted the present study to explore the wound healing activity and the antimicrobial activities of L. camara against the specific microorganisms which generally infect burn wound.

  15. Endodoncia regenerativa: utilización de fibrina rica en plaquetas autóloga en dientes permanentes vitales con patología pulpar. Revisión narrativa de la literatura*

    OpenAIRE

    Tatiana Ramírez Giraldo; Henry Sossa Rojas

    2014-01-01

    Actualmente una de las mayores controversias en el tratamiento de dientes permanentes con diagnóstico de pulpitis está en la decisión de realizar una Terapia Pulpar Vital (TPV) o un tratamiento convencional de conductos. Diferentes estudios han reportado que se pueden obtener resultados previsibles mediante la realización de una TPV. El éxito del tratamiento dependerá de una adecuada comprensión de la  biología pulpar, un estricto protocolo de tratamiento y una adecuada selección del caso. Co...

  16. Uso de novos materiais para o capeamento pulpar (hidroxiapatita - HAp e fosfato tricálcico - β-TCP The use of new materials for pulp capping (hydroxyapatite - HAp and tricalcium phosphate - β-TCP

    Directory of Open Access Journals (Sweden)

    C. S. Delfino

    2010-12-01

    Full Text Available O capeamento pulpar é uma medida importante e muito usada no cotidiano da prática odontológica e, quando realizado de forma consciente, baseado em um bom diagnóstico da condição pulpar no momento da exposição, pode prevenir o dente de sofrer uma intervenção endodôntica. Além do hidróxido de cálcio, outros materiais vêm sendo testados quanto a sua ação em promover o reparo pulpar pela formação de ponte de dentina, após capeamento pulpar direto. Uma das alternativas de materiais viáveis para o capeamento pulpar são as cerâmicas à base de fosfatos de cálcio, destacando-se a hidroxiapatita (HAp e o fosfato tricálcico (β-TCP. Estes materiais não promovem a formação de área necrótica, característica da utilização do hidróxido de cálcio, são biocompatíveis e favorecem o reparo do tecido pulpar. Para avaliar os efeitos desses materiais no capeamento pulpar foi realizada esta revisão de literatura, abordando desde a resposta do tecido pulpar, até o protocolo para o uso clínico.Pulp capping is an important measure and one with a high rate of use in daily dental practice, and when it is conscientiously performed, based on good diagnosis of the pulp condition at the time of its exposure, it may prevent the tooth from requiring endodontic intervention. In addition to calcium hydroxide, other materials have been tested with regard to their action in promoting pulp repair by the formation of a dentin bridge after direct pulp capping. Some of the feasible alternative materials for pulp capping are calcium phosphate-based ceramics, with hydroxyapatite (HAp and tricalcium phosphate (β-TCP being outstanding. These materials do not promote formation of a necrotic area, characteristic of the use of calcium hydroxide, are biocompatible and favor pulp tissue repair. To evaluate the effects of these materials on pulp capping, this literature review was conducted, the approach being wide ranging in scope, from pulp response

  17. Phytochemical Characterization and in-vivo Anti-Malaria Activity of Lantana camara Leaf Extract

    Directory of Open Access Journals (Sweden)

    Gabi Baba

    2011-12-01

    Full Text Available The characteristic multi-drug resistant strains of Plasmodium to the existing anti-malaria has increase the global threat of malaria, couple with the wide medicinal application of Lantana camara in different countries and the literature of its use as anti-microbial, antifungal and insecticidal agents, and the quest for alternative anti-malaria this work look into the phytochemical screening, characterization and the In-vivo anti-malaria activity of the Lantana camara leaf extracts. The leaf extracts from plant were screened for phytochemicals and further FTIR characterized to correlate the routine qualitative phytochemical screening. In-vivo anti-plasmodia screening was carried out using 24 Swiss albino mice under laboratory conditions. The effectiveness of the aqueous and ethanolic extracts from the plant (L. camara was compared with standard drug Chloroquine. The result indicated the presence of Alkaloids, Cardiac glycosides and Saponins in the Petroleum ether, aqueous and ethanolic extracts. Carbohydrate in both aqueous and ethanolic extracts, while Flavonoids and steroids in petroleum ether and ethanolic extracts. Tannins and terpenoids were present in aqueous and ethanolic extracts respectively. The identified phytochemicals correlate with FTIR spectral analysis from the identified characteristic functional groups. In-vivo study showed that Chloroquine was 83% effective in clearing the parasites, while aqueous and ethanolic extracts were 38 and 76% effective respectively. The curative capacity indicated possible concentration and time-dependency. The ethanolic extract showed higher level of anti-malaria potential and has indicated some level of protection.

  18. Valoración histológica de la respuesta pulpar y hepática del formocresol y el hueso liofilizado en dientes de rata.

    OpenAIRE

    Alcaina Lorente, Maria Antonia

    2003-01-01

    Son varios los agentes que se han utilizado para las pulpotomías en dientes primarios, siendo el formocresol el más difundido. El objetivo de este estudio fue evaluar la respuesta pulpar en dientes de rata cuando el hueso liofilizado es usado como agente de pulpotomía y analizar los cambios histológicos del tejido hepático. La muestra de este estudio estaba formada por 60 ratas de raza Sprague-Dawley. El tratamiento se realizó en los primeros molares superiores, siendo un total de 120 d...

  19. Regulating mineralization rates of Tithonia diversifolia and Lantana camara prunings to improve phosphorus availability in calcareous soils

    OpenAIRE

    Y. Nuraini; N. Sukmawatie

    2014-01-01

    The effect of mixing of Tithonia diversifolia and Lantana camara prunings to improve synchronization between P released from the prunings with crop demand for P was studied in a laboratory and in a glasshouse. Tithonia diversifolia prunings (Td), Lantana camara prunings (Lc), and farmyard manure (Pk) were thoroughly mixed with the proportion (% of dry weight) of; 25Td +75 Lc ; 50Td +50 Lc ; 75Td +25 Lc ; 90Lc +10 Pk ; 45Td +45 +10 Lc Pk ; 100Td and 100Lc, and then mixed with 100 g of air-drie...

  20. Chemical Characterization of Volatile Compounds of Lantana camara L. and L. radula Sw. and Their Antifungal Activity

    OpenAIRE

    Juliana Lanna Passos; Luiz Claudio de Almeida Barbosa; Antonio Jacinto Demuner; Elson Santiago de Alvarenga; Cleiton Moreira da Silva; Robert Weingart Barreto

    2012-01-01

    A comparative study of the chemical composition of essential oils of two very similar species of the Verbenaceae family (Lantana camara and L. radula) revealed that the main components of essential oil of L. camara were germacrene-D (19.8%) and E-caryophyllene (19.7%), while those of L. radula were E-caryophyllene (25.3%), phytol (29.2%) and E-nerolidol (19.0%). We have hypothesized that the observed differences could contribute to the differentiated reaction of the two species of Lantana to ...

  1. Variation in antioxidant and antimicrobial activities in Lantana camara L. flowers in relation to extrac- tion methods

    Directory of Open Access Journals (Sweden)

    Madiha Manzoor

    2013-09-01

    Full Text Available Background. The present work was designed to appraise how different extraction solvents and techniques affect the extractability of antioxidant and antimicrobial components from Lantana camara (L. camard flowers. Material and methods. Four extraction solvents including 100% methanol, 80% methanol, 100% ethanol and 80% ethanol coupled with three extraction techniques namely stirring, microwave-assisted stirring and ultrasonic-assisted stirring employed to isolate extractable components from the flowers of L. camara. The extracts produced were evaluated for their antioxidant and antimicrobial attributes. Results and discussion. The yield of extractable components varied over a wide range 4.87-30.00% in relation to extraction solvent and techniques. The extracts produced contained considerable amounts of total phenolics (8.28-52.34 mg GAE/100 g DW and total flavonoids (1.24-7.88 mg CE/100 g DW. Furthermore, a promising antioxidant activity in terms of DPPH° scavenging, inhibition of linoleic acid peroxidation and reducing power, as well as antimicrobial potential of the extracts were recorded against the selected bacterial and fungal strains. Conclusions. It was concluded that both extraction solvent and techniques employed affected the antioxidant and antimicrobial attributes of the extracts from L. camara flowers. With few exceptions, overall methanolic extracts produced by ultrasonic-assisted stirring offered superior activities followed by the microwave-as- sisted stirring and then stirring. The results advocate the use of appropriate extraction strategies to recover potent antioxidant and antimicrobial agents from the flowers of L. camara for nutraceutical and therapeutic.

  2. WIND DIRECTION, pH and other data from ALMIRANTE CAMARA and ALMIRANTE SALDANHA from 1979-01-07 to 1979-12-11 (NODC Accession 8100468)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Water depth and other station data collected from ALMIRANTE CAMARA, ALMIRANTE SALDANHA and other Platforms for one year. The data was collected between January 7,...

  3. Allelopathic Effect of Lantana camara L. Leaf Powder on Germination and Growth Behaviour of Maize, Zea mays Linn. and Wheat, Triticum turgidum Linn. Cultivars

    OpenAIRE

    Abiyu Enyew; Nagappan Raja

    2015-01-01

    Aim of the present study was to evaluate allelopathic effect of Lantana camara leaf powder on germination and growth behaviour of Zea mays and Triticum turgidum. The pot culture experiments were conducted at Botany laboratory, Tewodros campus, University of Gondar, Ethiopia from November 2012 to April 2013. The experimental design was Completely Randomized Block Design (CRBD) with three treatments and one control. The soil without adding L. camara leaf powder was considered as control (T0) an...

  4. Endodoncia regenerativa: utilización de fibrina rica en plaquetas autóloga en dientes permanentes vitales con patología pulpar. Revisión narrativa de la literatura*

    Directory of Open Access Journals (Sweden)

    Tatiana Ramírez Giraldo

    2014-07-01

    Full Text Available Actualmente una de las mayores controversias en el tratamiento de dientes permanentes con diagnóstico de pulpitis está en la decisión de realizar una Terapia Pulpar Vital (TPV o un tratamiento convencional de conductos. Diferentes estudios han reportado que se pueden obtener resultados previsibles mediante la realización de una TPV. El éxito del tratamiento dependerá de una adecuada comprensión de la  biología pulpar, un estricto protocolo de tratamiento y una adecuada selección del caso. Con este fin, diferentes materiales han sido sugeridos. Recientemente se ha utilizado la Fibrina Rica en Plaquetas, biomaterial que cumple con propiedades biológicas para lograr una mayor rapidez y adecuada cicatrizacion del tejido. Es necesario desarrollar tratamientos dirigidos a preservar la vitalidad de la pulpa, evitando recurrir como primera opción al tratamiento convencional de conductos, teniendo como objetivo conservar o regenerar el complejo dentino pulpar.

  5. Long-Term Environmental Correlates of Invasion by Lantana camara (Verbenaceae) in a Seasonally Dry Tropical Forest

    OpenAIRE

    Ramaswami, Geetha; Sukumar, Raman

    2013-01-01

    Invasive species, local plant communities and invaded ecosystems change over space and time. Quantifying this change may lead to a better understanding of the ecology and the effective management of invasive species. We used data on density of the highly invasive shrub Lantana camara (lantana) for the period 1990–2008 from a 50 ha permanent plot in a seasonally dry tropical forest of Mudumalai in southern India. We used a cumulative link mixed-effects regression approach to model the transiti...

  6. Variation in antioxidant and antimicrobial activities in Lantana camara L. flowers in relation to extrac- tion methods

    OpenAIRE

    Madiha Manzoor; Farooq Anwar; Bushra Sultana; Muhammad Mushtaq

    2013-01-01

    Background. The present work was designed to appraise how different extraction solvents and techniques affect the extractability of antioxidant and antimicrobial components from Lantana camara (L. camard) flowers. Material and methods. Four extraction solvents including 100% methanol, 80% methanol, 100% ethanol and 80% ethanol coupled with three extraction techniques namely stirring, microwave-assisted stirring and ultrasonic-assisted stirring employed to isolate extractable components from t...

  7. Regulating mineralization rates of Tithonia diversifolia and Lantana camara prunings to improve phosphorus availability in calcareous soils

    Directory of Open Access Journals (Sweden)

    Y. Nuraini

    2014-01-01

    Full Text Available The effect of mixing of Tithonia diversifolia and Lantana camara prunings to improve synchronization between P released from the prunings with crop demand for P was studied in a laboratory and in a glasshouse. Tithonia diversifolia prunings (Td, Lantana camara prunings (Lc, and farmyard manure (Pk were thoroughly mixed with the proportion (% of dry weight of; 25Td +75 Lc ; 50Td +50 Lc ; 75Td +25 Lc ; 90Lc +10 Pk ; 45Td +45 +10 Lc Pk ; 100Td and 100Lc, and then mixed with 100 g of air-dried soil with a rate equivalent to 100 kg P / ha. Results of the study showed that the pruning mixtures decomposed and mineralized faster than that of Lantana camara pruning only, but slower than that of Tithonia diversifolia pruning only. The amount of P released from the pruning mixtures increased with increasing proportion of Tithonia diversifolia pruning in the mixtures. Increasing proportion of Tithonia diversifolia pruning in the mixture applied to the soil increased the amount of P taken up by maize.

  8. In vitro antioxidant and DNA damage inhibition activity of aqueous extract of Lantana camara L. (Verbenaceae) leaves

    Institute of Scientific and Technical Information of China (English)

    Kokati Venkata Bhaskara Rao

    2012-01-01

    Objective: To investigate the in vitro antioxidant and DNA damage inhibition potential of aqueous extract of Lantana camara leaves. Methods: Antioxidant activity of the aqueous extract of L. camara was estimated by 2, 2-diphenyl-1-picrylhydrazyl radical scavenging assay, metal chelating activity and reducing power assay. DNA damage inhibition was performed by photolysing H2O2 by UV radiation in the presence of pBR322 and extract. Estimation of phenolic content was carried out by Folin-Ciocalteau assay. Results: Extract exhibited high antioxidant activity in DPPH radical scavenng assay (IC50= 42.66 μg/ml), metal chelating activity (IC50= 1036.4μg/ml) and reducing power assay. Extract also exhibited the complete protection of pBR322 plasmid DNA during DNA damage inhibition assay. Extract showed high phenolic content which justified the antioxidant and DNA damage inhibition properties of the plant. Conclusions:These observations emphasize that aqueous extract of L. camara possess high antioxidant and DNA damage inhibition potential, thus, the plant can be used to develop natural antioxidant compounds for therapeutic use.

  9. Factors influencing the local scale colonisation and change in density of a widespread invasive plant species, Lantana camara, in South India

    Directory of Open Access Journals (Sweden)

    Bharath Sundaram

    2015-04-01

    Full Text Available Identifying factors that underlie invasive species colonisation and change in density could provide valuable insights into the mechanisms of biological invasions and for invasive species management. We examined a suite of factors potentially influencing the landscape-level invasion of Lantana camara L., one of the most ubiquitous invasive species in South Asia. These factors included disturbance factors like forest fires, historical habitat modification, and edge effects, in addition to factors like propagule pressure and habitat suitability. We examined the relative importance of these factors on the colonisation and change in density of L. camara in the Biligiri Rangaswamy Temple Tiger Reserve, Western Ghats, India. We used extensive (1997–2008 datasets tracking the presence and abundance of L. camara and combined these with corresponding data on disturbances, propagule pressure, and habitat suitability. We used an information-theoretic model selection approach to determine the relative importance of each factor on the colonisation and change in density of L. camara. Colonisation was mainly a function of proximity to already established populations (i.e. propagule pressure, whereas increase in L. camara density appeared to be constrained by high fire frequency. Research and management efforts need to recognize the multi-dimensional nature of mechanisms underlying L. camara’s success during different invasion phases when strategizing interventions to mitigate its effects.

  10. Revascularización pulpar en dientes permanentes con ápice abierto por medio de la utilización de plasma rico en plaquetas en combinación con soportes de colágeno tipo I. : estudio descriptivo

    OpenAIRE

    Bustos Orozco, Ingrid Lorena

    2014-01-01

    La revascularización pulpar es el procedimiento enmarcado dentro de la endodoncia regenerativa, con el fin de lograr el cierre apical, engrosamiento de las paredes dentinales y la resolución apical producto de una patología pulpar y/o periapical en dientes inmaduros. La endodoncia regenerativa busca regenerar y no reparar, está basada en tres componentes principales: las células madre, que pueden diferenciarse en células implicadas en el desarrollo radicular; los factores de cr...

  11. Sensitivity analysis of CLIMEX parameters in modelling potential distribution of Lantana camara L.

    Directory of Open Access Journals (Sweden)

    Subhashni Taylor

    Full Text Available A process-based niche model of L. camara L. (lantana, a highly invasive shrub species, was developed to estimate its potential distribution using CLIMEX. Model development was carried out using its native and invasive distribution and validation was carried out with the extensive Australian distribution. A good fit was observed, with 86.7% of herbarium specimens collected in Australia occurring within the suitable and highly suitable categories. A sensitivity analysis was conducted to identify the model parameters that had the most influence on lantana distribution. The changes in suitability were assessed by mapping the regions where the distribution changed with each parameter alteration. This allowed an assessment of where, within Australia, the modification of each parameter was having the most impact, particularly in terms of the suitable and highly suitable locations. The sensitivity of various parameters was also evaluated by calculating the changes in area within the suitable and highly suitable categories. The limiting low temperature (DV0, limiting high temperature (DV3 and limiting low soil moisture (SM0 showed highest sensitivity to change. The other model parameters were relatively insensitive to change. Highly sensitive parameters require extensive research and data collection to be fitted accurately in species distribution models. The results from this study can inform more cost effective development of species distribution models for lantana. Such models form an integral part of the management of invasive species and the results can be used to streamline data collection requirements for potential distribution modelling.

  12. Lantana camara L. (Verbenaceae) invasion along streams in a heterogeneous landscape

    Indian Academy of Sciences (India)

    Geetha Ramaswami; Raman Sukumar

    2014-09-01

    Streams are periodically disturbed due to flooding, act as edges between habitats and also facilitate the dispersal of propagules, thus being potentially more vulnerable to invasions than adjoining regions. We used a landscape-wide transect-based sampling strategy and a mixed effects modelling approach to understand the effects of distance from stream, a rainfall gradient, light availability and fire history on the distribution of the invasive shrub Lantana camara L.(lantana) in the tropical dry forests of Mudumalai in southern India. The area occupied by lantana thickets and lantana stem abundance were both found to be highest closest to streams across this landscape with a rainfall gradient. There was no advantage in terms of increased abundance or area occupied by lantana when it grew closer to streams in drier areas as compared to moister areas. On an average, the area covered by lantana increased with increasing annual rainfall. Areas that experienced greater number of fires during 1989–2010 had lower lantana stem abundance irrespective of distance from streams. In this landscape, total light availability did not affect lantana abundance. Understanding the spatially variable environmental factors in a heterogeneous landscape influencing the distribution of lantana would aid in making informed management decisions at this scale.

  13. Endodoncia preventiva: Protección pulpar mediante la técnica de eliminación de la caries en etapas (stepwise excavation) Preventive endodontics: pulp protection using stepwise caries removal procedure

    OpenAIRE

    L. Castellanos-Cosano; J. Martín-González; C. Calvo-Monroy; F.J. López-Frías; E. Velasco-Ortega; J.M. Llamas-Carreras; J.J. Segura-Egea

    2011-01-01

    El tratamiento de la caries dentinaria profunda en dientes permanentes se ha venido realizando, generalmente, mediante la remoción completa y en una sola sesión de la dentina cariada, incluyendo la dentina blanda desmineralizada, sin tener en cuenta el potencial regenerador de la pulpa dental. Una complicación frecuentemente ligada a esta actitud es la exposición pulpar intraoperatoria que, en muchos casos, termina en tratamiento de conductos. Varios estudios han demostrado que la eliminación...

  14. Batch, Kinetic and Equilibrium Studies of Chromium (Vi From Aqueous Phase Using Activated Carbon Derived From Lantana Camara Fruit

    Directory of Open Access Journals (Sweden)

    K. Nithya

    2015-12-01

    Full Text Available Batch experiments have been conducted to determine the maximum adsorption capacity of activated carbon derived from Lantana camara fruit to remove hexavalent chromium from aqueous solution. The removal efficiency and uptake capacity of the biosorbent were determined by varying several batch level parameters. Highest removal efficiency of the biosorbent was found to be almost 99% under optimal conditions. Maximum monolayer adsorption capacity was determined to be 86 mg/g. The experimental data best fitted with Langmuir adsorption isotherm and pseudo second order model. These findings conclude that the selected biosorbent has more promising features in binding hexavalent chromium in aqueous media.

  15. Ventajas del mineral trióxido agregado y del hidróxido de calcio frente a patologías pulpares de tipo degenerativo

    Directory of Open Access Journals (Sweden)

    Edison Gabriel Quintero Ricardo

    2014-06-01

    Full Text Available ResumenEl agregado de trióxido mineral (MTA es un material desarrollado para endodoncia. Las principales indicaciones del MTA, son el tratamiento pulpar en dientes vitales (pulpotomias, recubrimiento pulpar directo, apicoformaciones (barrera apical, cirugía endodóncica, reparación de perforaciones furcales, laterales y las provocadas por las reabsorciones. El MTA favorece la formación de hueso y cemento, y puede facilitar la regeneración del ligamento periodontal sin provocar inflamación; como un coadyuvante del MTA en los procesos de reparación tenemos el hidróxido de calcio que es un potente agente bacteriostático y bactericida que se utiliza para el control de microorganismos cuando es empleado como medicamento intraconducto, igualmente actúa como agente catalizador en la modificación del pH en los tejidos periapicales con el fin de favorecer el proceso de cicatrización, presenta excelentes propiedades higroscópica en cuanto al control del exudado en conductos radiculares de dientes con lesiones periapicales grandes los cuales muchas veces presentan humedad persistente en los canales radiculares asimismo actúa en la prevención o detención de procesos resortivos ejerciendo efectos moduladores en la actividad clástica. Por tales propiedades el artículo tiene como fin mostrar los efectos a corto plazo que ocurren en una reabsorción interna y lesión apical al momento de utilizar mineral trióxido agregado (MTA e hidróxido de calcio como material intracanal. (Duazary 2009-II 141-146AbstractMineral trioxide aggregate (MTA is a new material developed for endodontics. The principal indications of MTA are vital pulp therapy (pulpotomy, direct pulp capping, apexification (apical plug, endodontic surgery, and lateral, furcal and resorption perforations repair. The MTA induce the formation of cementum and bone, and it may facilitate the regeneration of the periodontal ligament without causing any inflammation; as a helping of the

  16. Effect of Collection Time on Essential Oil Composition of Lantana camara Linn (Verbenaceae Growing in Brazil Northeastern

    Directory of Open Access Journals (Sweden)

    Erlânio O. Sousa

    2010-01-01

    Full Text Available To verify the composition variation of its essential oil along 24 hours, leaves of Lantana camara Linn. of medicinal plant collection of the Department of Chemical Biology of URCA-Crato–CE, were collected every three hours during one day (of the 07:00 to 19:00 h in April, 2008. The leaves had its oil extracted by hydro-distillation in Clevenger apparatus during three hours with two repetitions. The chemical composition analysis of the extracted essential oils was carried out in gas chromatography/mass spectroscopy. The phytochemical profile of the essential oils presented significant difference in function of the harvest. The seven most abundant were: germacrene D (24.50-6.15%, biciclogermacrene (33.32-14.27%, spathulenol (25.04-1.06%, eremophilene (20.64-1.93%, valecene (33.70-0.84%, viridiflorene (19.46% and 1,10-di-epi-cubenol (27.93-21.32. The different result found here indicates the existence of different chemotypes of L. camara

  17. Prestaciones del Detector Central de Muones del Experimento CMS: las Camaras de Deriva y su Sistema de Trigger (Performance of the Central Muon Detector of the Experiment CMS: the Drift Tube Chambers and its Trigger System)

    CERN Document Server

    Muñoz, Carlos Villanueva

    2007-01-01

    Prestaciones del Detector Central de Muones del Experimento CMS: las Camaras de Deriva y su Sistema de Trigger (Performance of the Central Muon Detector of the Experiment CMS: the Drift Tube Chambers and its Trigger System)

  18. Lantana camara Linn leaf extract mediated green synthesis of gold nanoparticles and study of its catalytic activity

    Science.gov (United States)

    Dash, Shib Shankar; Bag, Braja Gopal; Hota, Poulami

    2015-03-01

    A facile one-step green synthesis of stable gold nanoparticles (AuNPs) has been described using chloroauric acid (HAuCl4) and the leaf extract of Lantana camara Linn (Verbenaceae family) at room temperature. The leaf extract enriched in various types of plant secondary metabolites is highly efficient for the reduction of chloroaurate ions into metallic gold and stabilizes the synthesized AuNPs without any additional stabilizing or capping agents. Detailed characterizations of the synthesized gold nanoparticles were carried out by surface plasmon resonance spectroscopy, transmission electron microscopy, dynamic light scattering, Zeta potential, X-ray diffraction and Fourier transform-infrared spectroscopy studies. The synthesized AuNPs have been utilized as a catalyst for the sodium borohydride reduction of 4-nitrophenol to 4-aminophenol in water at room temperature under mild reaction condition. The kinetics of the reduction reaction has been studied spectrophotometrically.

  19. Pulp tissue dissolution when the use of sodium hypochlorite and EDTA alone or associated = Dissolução do tecido pulpar quando do uso do hipoclorito de sódio e EDTA isoladamente ou associados

    OpenAIRE

    Só, Marcus Vinicius Reis

    2011-01-01

    Objetivo: O objetivo do presente estudo foi avaliar a capacidade de dissolução tecidual de várias concentrações de hipoclorito de sódio, isoladamente ou em combinação com o EDTA 17%. Metodologia: Oitenta fragmentos de polpa bovina foram preparados e seus pesos foram determinados através de uma balança de precisão. Cada fragmento pulpar foi imerso por 2 horas em cada uma das soluções/misturas e formaram os seguintes grupos: G1- Solução salina; G2- NaOCl 0,5%; G3- NaOCl 1%; G4- NaOCl 2,5%; G...

  20. Endodoncia preventiva: Protección pulpar mediante la técnica de eliminación de la caries en etapas (stepwise excavation Preventive endodontics: pulp protection using stepwise caries removal procedure

    Directory of Open Access Journals (Sweden)

    L. Castellanos-Cosano

    2011-10-01

    Full Text Available El tratamiento de la caries dentinaria profunda en dientes permanentes se ha venido realizando, generalmente, mediante la remoción completa y en una sola sesión de la dentina cariada, incluyendo la dentina blanda desmineralizada, sin tener en cuenta el potencial regenerador de la pulpa dental. Una complicación frecuentemente ligada a esta actitud es la exposición pulpar intraoperatoria que, en muchos casos, termina en tratamiento de conductos. Varios estudios han demostrado que la eliminación de la caries dentinaria profunda por etapas, en dos visitas con varios meses de diferencia, protege a la pulpa, disminuyendo la frecuencia de exposiciones pulpares, a la vez que permite la formación de dentina terciaria, con la consiguiente disminución del porcentaje de casos que requieren tratamiento endodóncico. En este artículo se analiza el estado del conocimiento y la evidencia científica sobre este tema.The treatment of deep dentine carious lesions in permanent teeth has included, generally, complete removal of affected dentin in a single session, including soft demineralized dentin, regardless of the regenerative potential of dental pulp. One complication often linked to this attitude is the pulp exposure, in many cases ending in root canal treatment. Several studies have shown that the elimination of deep dentine caries in stages, in two visits to several months apart, protects the pulp, reducing the frequency of pulp exposures, while allowing the development of tertiary dentin, with the consequent decrease in the percentage of cases requiring endodontic treatment. This article discusses the state of knowledge and scientific evidence on this topic.

  1. Creams Formulated with Ocimum gratissimum L. and Lantana camara L. Crude Extracts and Fractions as Mosquito Repellents Against Aedes aegypti L. (Diptera: Culicidae)

    OpenAIRE

    Keziah, Ezeike Amarachi; Nukenine, Elias Nchiwan; Danga, Simon Pierre Yinyang; Younoussa, Lame; Esimone, Charles Okechukwu

    2015-01-01

    Mosquitoes are the most deadly vectors of parasites that cause diseases such as malaria, yellow fever, and filariasis. In view of the recent increased interest in developing plant origin insecticides as an alternative to chemical insecticides, the objective of this study was to determine the repellent activity of creams formulated with methanol crude extract (MCE), hexane fraction (HF), and ethyl acetate fractions (EAFs) of Ocimum gratissimum and Lantana camara leaves in single and combined a...

  2. Evaluation of temperature variation in pulp chamber after high power diode laser irradiation ({lambda}=830 nm) on dental enamel: 'in vitro' study; Avaliacao da variacao da temperatura na camara pulpar apos a irradiacao de diodo laser de alta potencia de 830 nanometros em esmalte dental: estudo 'in vitro'

    Energy Technology Data Exchange (ETDEWEB)

    Macri, Rodrigo Teixeira

    2001-07-01

    The aim of this study was to observe the variation of temperature in the pulp chamber caused by irradiation of a commercial diode laser operating in continuous wave with wavelength 830 nm over the dental enamel. In the first part of this study, two types of tooth models were tested: 3,5 mm slice and whole tooth. In the second part, we irradiated the buccal si de of the enamel in 2 primary lower incisors from cattle with Opus 10 diode laser for 10 s with power levels of 1 W and 2 W, always using an absorber. Two thermocouples were used. The first one was inserted in the dentin wall closest to the irradiation site, while the second was inserted in the middle of the pulp chamber. It was observed that the thermocouples registered different temperatures. Always, the dentin thermocouple registered higher temperatures. Considering the dentin records, the irradiation of 1 W for 10 s can be safe for the pulp. Further studies must be developed related to the correct positioning of the thermocouples inside the pulp chamber. This was a first step of using diode laser in enamel, and in this study, we concluded that the Opus 10 diode laser shown to be safe for this use, with 1 W power for 10 S. (author)

  3. Avaliação em MEV da fenda resultante da contração de polimerização da resina composta aplicada sobre diferentes materiais protetores pulpares = A sem evaluation of the gap resulting from the polymerization shrinkage of composite resins applied to different pulp protective materials

    OpenAIRE

    Unfer, Daniele Taís

    2006-01-01

    Introdução: A resina composta sofre contração como resultado da reação de polimerização que pode deslocar os materiais protetores pulpares, caso estes apresentem deficiente ou nenhuma adesão a dentina. Objetivo: avaliar o comportamento de dois materiais de proteção pulpar (CIV e CaOH2 cement) em relação presença de fenda, quando submetidos a estresse de contração da resina composta e avaliar a fenda resultante da contração de polimerização entre dentina e resina composta. Metodologia: Foram c...

  4. Allelopathic Effect of Lantana camara L. Leaf Powder on Germination and Growth Behaviour of Maize, Zea mays Linn. and Wheat, Triticum turgidum Linn. Cultivars

    Directory of Open Access Journals (Sweden)

    Abiyu Enyew

    2015-01-01

    Full Text Available Aim of the present study was to evaluate allelopathic effect of Lantana camara leaf powder on germination and growth behaviour of Zea mays and Triticum turgidum. The pot culture experiments were conducted at Botany laboratory, Tewodros campus, University of Gondar, Ethiopia from November 2012 to April 2013. The experimental design was Completely Randomized Block Design (CRBD with three treatments and one control. The soil without adding L. camara leaf powder was considered as control (T0 and (T1, (T2 were mixed with 25, 50 and 75 g of L. camara leaf powder, respectively. The percentage of germination, root and shoot length, stem thickness and biomass were recorded from three replicates. Maximum germination percentage of wheat (96.60% and maize (53.33% was recorded at T1 and it was minimum (70% in wheat and maize (43.33% at 3 compared to control (100%. The germination index of wheat and maize was 5 cm and 1.9 cm, respectively at T1. The shoot and root length variation observed in wheat and maize was statistically significant (p<0.05 compared to control. The percentage root inhibition of wheat and maize was 62.1 and 39.4%, respectively at 3 T3 compared to control. The stem thickness variation among the treatment and control was statistically significant (p<0.05 in both the experimental plants. Maximum fresh weight and dry weight of wheat was 1.3 g and 0.4 g, respectively at T0 and minimum was 0.8 and 0.1 g, respectively at 3. In maize, maximum fresh weight and dry weight was 8.5 g and 1.5 g, respectively at T0 and minimum 3.9 and 0.4 g, respectively at 3. The biomass variation of wheat and maize results were statistically significant (p<0.05. In conclusion, L. camara leaf powder significantly inhibits seed germination, speed of germination, shoot and root length, stem thickness and biomass of wheat and maize. By keeping the L. camara plants around agricultural field may affect growth parameter of wheat and maize. Further studies on

  5. Microaspersores entupidos devido a problemas de ferro na água Microsprinkler clogged due to iron problems in the water

    Directory of Open Access Journals (Sweden)

    Túlio Assunção Pires Ribeiro

    2008-08-01

    Full Text Available Um dos aspectos relevantes a ser considerado no manejo da irrigação é a uniformidade de distribuição de água pelo sistema. Este trabalho foi desenvolvido com o objetivo de avaliar a eficiência da cloração com a utilização de hipoclorito de sódio na desobstrução de microaspersores devido à utilização de águas com elevado teor de ferro. Um sistema com dez meses de uso apresentava setores com vazões de 5% a 57% menores que a vazão de projeto. Foi feito o tratamento químico da água de irrigação, utilizando-se hipoclorito de sódio com 12% de cloro livre na dosagem de 100 mg L-1 e ácido sulfúrico, na concentração de 98%, para manter o pH da água de irrigação em torno de 4,5. O resultado indicou que houve aumento significativo nas vazões médias dos microaspersores em todos os setores avaliados e diminuição na variação da vazão dos mesmos com relação à estimada no projeto.An important aspect to be considered in irrigation managment is the uniformity distribution of water through the irrigation system. This research had the objective to evaluate the efficiency of chlorination in the use of sodium hypochlorite in clearing of microsprinkler due to the presence of high iron concentration in water. The equipment with less than a year of use presenting sectors with 5% and 57% lower flow than the original project flow. The chemical treatment of water irrigation utilized sodium hypochlorite with 12% free chlorine on 100mg L-1 concentration, and sulphuric acid 98% to maintain the pH of water irrigation about 4.5. The result demonstrated a significant increase in the average flow of the microsprinkler's variation in all evaluted setors, and decrease in their flow variation related to the estimated in the project.

  6. Experimental and theoretical investigations of Lantana camara oil diffusion from polyacrylonitrile membrane for pulsatile drug delivery system

    International Nuclear Information System (INIS)

    Porous composite membrane of polyacrylonitrile (PAN) and Lantana camara essential oil was synthesized by solvent casting method. Stability of oil in PAN solution was measured by XiGo nano tool indicating constant relaxation time of 1487 time/s. Pore size of few microns confirmed by electron microscopy was supported by atomic force microscopy indicating roughness factor of 0.9 nm. Contact angle of 2° inveterates superhydrophilicity of the composite membrane. Membrane showed excellent antibacterial activity against both Gram-positive Bacillus subtilis and Gram-negative Escherichia coli with a 7–10 mm zone of inhibition. In vitro release of Lantana oil from the composite membrane was carried out in isotonic phosphate buffer solution (pH = 7.4). Lantana oil was released for 9 h, lag time of 3 h with constant 33% release confirmed PAN membranes as potential system for pulsatile drug delivery applications. Diffusion of E-caryophyllene (antibacterial component of oil) which was studied through molecular simulation using Material Studio software ensued diffusion coefficient value of 1.11 ∗ 10−9 m2/s. Biocompatibility of the composite membrane was assessed by mouse embryonic fibroblast cell line (NIH 3T3) through MTT assay indicating more than 91% viable cell even at 200 μg/mL concentration. Such membranes can be efficiently used in biomedical applications as antibacterial and antifungal agent. - Highlights: • Pulsatile release • Lantana oil–PAN composite membrane as antibacterial material • Enhanced bactericidal activity of the membrane

  7. Chemical composition and antibacterial properties of the essential oil and extracts of Lantana camara Linn. from Uttarakhand (India)

    Institute of Scientific and Technical Information of China (English)

    Richa Seth; Manindra Mohan; Prashant Singh; Syed Zafar Haider; Sanjay Gupta; Irshita Bajpai; Deepak Singh; Rajendra Dobhal

    2012-01-01

    Objective: The purpose of this study was to evaluate the essential oil composition as well as antibacterial activities of essential oil and leaves extracts of Lantana camara against five bacterial strains. Methods: Essential oil was obtained by hydro-distillation from the leaves and analyzed by GC and GC-MS. The antibacterial activities of essential oil and the leaves extracts were tested by using disk diffusion method against five bacterial strains. Results: Thirty seven compounds were identified representing 98.11% of the total oil, of which trans-caryophyllene (13.95%), bicyclogermacrene (9.77%), α-curcumene (8.57%), sabinene (8.28%), (E)-citral (6.90%), 1,8 cineole (5.06%), α-pinene (4.03%), γ-terpinene (3.83%) and germacrene D (3.13%) were detected as major components. In respect to the antibacterial activities, essential oil showed the high degree of sensitivity against Micrococcus luteus, Escherichia coli, Staphylococcus aureus and Bacillus cereus except Pseudomonas aeruginosa while extracts of leaves obtained through petroleum ether, benzene, methanol and water exhibited good to moderate antimicrobial activity against all tested bacterial strains. Conclusions: The present study suggested that M. luteus showed best zone of inhibition for the essential oil as well as aqueous extract among all the tested bacterial strains. The most active extract can be subjected to isolation of the therapeutic antimicrobials to carry out further pharmacological evaluation.

  8. Vermicomposting eliminates the toxicity of Lantana (Lantana camara) and turns it into a plant friendly organic fertilizer.

    Science.gov (United States)

    Hussain, N; Abbasi, Tasneem; Abbasi, S A

    2015-11-15

    In evidently the first study of its kind, vermicompost derived solely from a weed known to possess plant and animal toxicity was used to assess its impact on the germination and early growth of several plant species. No pre-composting or supplementation of animal manure was done to generate the vermicompost in order to ensure that the impact is clearly attributable to the weed. Whereas the weed used in this study, Lantana (Lantana camara), is known to possess strong negative allelopathy, besides plant/animal toxicity in other forms, its vermicompost was seen to be a good organic fertilizer as it increased germination success and encouraged growth of all the three botanical species explored by the authors - green gram (Vigna radiata), ladies finger (Abelmoschus esculentus) and cucumber (Cucumis sativus). In terms of several physical, chemical and biochemical attributes that were studied, the vermicompost appeared plant-friendly, giving best results in general when employed at concentrations of 1.5% in soil (w/w). Fourier transform infrared spectrometry revealed that the phenols and the sesquiterpene lactones that are responsible for the allelopathic impact of Lantana were largely destroyed in the course of vermicomposting. There is also an indication that lignin content of Lantana was reduced during its vermicomposting. The findings open up the possibility that the billions of tons of phytomass that is generated annually by Lantana and other invasives can be gainfully utilized in generating organic fertilizer via vermicomposting. PMID:26073377

  9. Evaluation of differential antitermitic activities of Lantana camara oven-dried tissues against Reticufitermes virginicus (Isoptera: Rhinotermitidae)

    Institute of Scientific and Technical Information of China (English)

    Zhonglin Yuan; Xingl Ping Hu

    2011-01-01

    Chemical-treated soil or physical barriers have been the most commonly used approach for termite management.We hypothesized that a barrier of soil incorporated with oven-dried Lantana camara L.tissues could prevent termite infestation.We first examined the antitermitic effects of the dried tissues from two cultivars (‘Mozelle’ and ‘New Gold’)on the subterranean termite,Reticulitermes virginicus (Banks) (Isoptera:Rhinotermitidae).Results show that all of the tissues of Mozelle had greater antitermic activity than corresponding tissues of New Gold,and leaves had greater termiticidal effects than flowers and stems.When termites were exposed to the test materials in a no-choice bioassay,the 24-day test resulted in a significant reduction of survival (52.5%-88.6%),running speed (18.2%-37.3%),live weight (21.8%-53.5%) and body water content (33.2%-56.2%) compared to the control.The consumption of leaves and flowers was exiguous.When used as 25% tissue mulch-barrier,the oven-dried lantana tissues decreased termite tunneling and wood consumption and increased termite mortality.The decreased survival,vigor,and low consumption indicate a toxic and anti-feeding property of the materials tested.The results therefore support our hypothesis that the dried lantana tissues possess antitermitic activities.

  10. Experimental and theoretical investigations of Lantana camara oil diffusion from polyacrylonitrile membrane for pulsatile drug delivery system.

    Science.gov (United States)

    Verma, Vivek; Balasubramanian, K

    2014-08-01

    Porous composite membrane of polyacrylonitrile (PAN) and Lantana camara essential oil was synthesized by solvent casting method. Stability of oil in PAN solution was measured by XiGo nano tool indicating constant relaxation time of 1487 time/s. Pore size of few microns confirmed by electron microscopy was supported by atomic force microscopy indicating roughness factor of 0.9 nm. Contact angle of 2° inveterates superhydrophilicity of the composite membrane. Membrane showed excellent antibacterial activity against both Gram-positive Bacillus subtilis and Gram-negative Escherichia coli with a 7-10mm zone of inhibition. In vitro release of Lantana oil from the composite membrane was carried out in isotonic phosphate buffer solution (pH=7.4). Lantana oil was released for 9h, lag time of 3h with constant 33% release confirmed PAN membranes as potential system for pulsatile drug delivery applications. Diffusion of E-caryophyllene (antibacterial component of oil) which was studied through molecular simulation using Material Studio software ensued diffusion coefficient value of 1.11∗10(-9) m(2)/s. Biocompatibility of the composite membrane was assessed by mouse embryonic fibroblast cell line (NIH 3T3) through MTT assay indicating more than 91% viable cell even at 200 μg/mL concentration. Such membranes can be efficiently used in biomedical applications as antibacterial and antifungal agent. PMID:24907763

  11. Effect of essential oils from leaves of Ageratum conyzoides, Lantana camara and Chromolaena odorata on the mortality of Sitophilus zeamais (Coleoptera, Curculionidae).

    Science.gov (United States)

    Bouda; Tapondjou; Fontem; Gumedzoe

    2001-04-01

    Ageratum conyzoides, Chromolaena odorata, and Lantana camara, are common weed species in Cameroon. Essential oil extracts from their leaves were tested for efficacy on the morality of the maize grain weevil, Sitophilus zeamais (Coleoptera, Curculionidae). Concentrations of the essential oils relative to the maize grains of 0.013, 0.025, 0.05 and 0.1% (v/w) were used for A. conyzoides and 0.063, 0.125, 0.25 and 0.50% (v/w) for C. odorata and L. camara. Twenty 7-day old adult weevils were fed on maize grains treated with the above concentrations of the essential oils in Petri dishes. Control dishes contained insects and maize grains without essential oils. The experiment was repeated three times. Dishes were incubated in the laboratory for 7 days at 26 degrees C and 75-85% relative humidity. Insect mortality was recorded every 24 h. Graphs of percentage mortality versus the duration of exposure were constructed and the LD(50) was computed for each oil. Significant insect mortality was obtained with all the essential oils used. The mortality of S. zeamais increased with the concentration of the essential oils of the three plants and the duration of exposure of the weevils on the treated substrates. The essential oil extract of Ageratum conyzoides was the most effective insecticide (LD(50)=0.09% in 24 h), followed by that of L. camara (LD(50)=0.16%) and C. odorata (LD(50)=6.78%). These results show that the essential oils of the leaves of some of these weed species may be exploited for insect control in stored products. PMID:11124374

  12. Long-term environmental correlates of invasion by Lantana camara (Verbenaceae) in a seasonally dry tropical forest.

    Science.gov (United States)

    Ramaswami, Geetha; Sukumar, Raman

    2013-01-01

    Invasive species, local plant communities and invaded ecosystems change over space and time. Quantifying this change may lead to a better understanding of the ecology and the effective management of invasive species. We used data on density of the highly invasive shrub Lantana camara (lantana) for the period 1990-2008 from a 50 ha permanent plot in a seasonally dry tropical forest of Mudumalai in southern India. We used a cumulative link mixed-effects regression approach to model the transition of lantana from one qualitative density state to another as a function of biotic factors such as indicators of competition from local species (lantana itself, perennial grasses, invasive Chromolaena odorata, the native shrub Helicteres isora and basal area of native trees) and abiotic factors such as fire frequency, inter-annual variability of rainfall and relative soil moisture. The density of lantana increased substantially during the study period. Lantana density was negatively associated with the density of H. isora, positively associated with basal area of native trees, but not affected by the presence of grasses or other invasive species. In the absence of fire, lantana density increased with increasing rainfall. When fires occurred, transitions to higher densities occurred at low rainfall values. In drier regions, lantana changed from low to high density as rainfall increased while in wetter regions of the plot, lantana persisted in the dense category irrespective of rainfall. Lantana seems to effectively utilize resources distributed in space and time to its advantage, thus outcompeting local species and maintaining a population that is not yet self-limiting. High-risk areas and years could potentially be identified based on inferences from this study for facilitating management of lantana in tropical dry forests. PMID:24167555

  13. Long-term environmental correlates of invasion by Lantana camara (Verbenaceae in a seasonally dry tropical forest.

    Directory of Open Access Journals (Sweden)

    Geetha Ramaswami

    Full Text Available Invasive species, local plant communities and invaded ecosystems change over space and time. Quantifying this change may lead to a better understanding of the ecology and the effective management of invasive species. We used data on density of the highly invasive shrub Lantana camara (lantana for the period 1990-2008 from a 50 ha permanent plot in a seasonally dry tropical forest of Mudumalai in southern India. We used a cumulative link mixed-effects regression approach to model the transition of lantana from one qualitative density state to another as a function of biotic factors such as indicators of competition from local species (lantana itself, perennial grasses, invasive Chromolaena odorata, the native shrub Helicteres isora and basal area of native trees and abiotic factors such as fire frequency, inter-annual variability of rainfall and relative soil moisture. The density of lantana increased substantially during the study period. Lantana density was negatively associated with the density of H. isora, positively associated with basal area of native trees, but not affected by the presence of grasses or other invasive species. In the absence of fire, lantana density increased with increasing rainfall. When fires occurred, transitions to higher densities occurred at low rainfall values. In drier regions, lantana changed from low to high density as rainfall increased while in wetter regions of the plot, lantana persisted in the dense category irrespective of rainfall. Lantana seems to effectively utilize resources distributed in space and time to its advantage, thus outcompeting local species and maintaining a population that is not yet self-limiting. High-risk areas and years could potentially be identified based on inferences from this study for facilitating management of lantana in tropical dry forests.

  14. Vermicomposting eliminates the toxicity of Lantana (Lantana camara) and turns it into a plant friendly organic fertilizer

    Energy Technology Data Exchange (ETDEWEB)

    Hussain, N.; Abbasi, Tasneem; Abbasi, S.A., E-mail: prof.s.a.abbasi@gmail.com

    2015-11-15

    Highlights: • It is shown for the first time that Lantana can lose its toxicity when vermicomposted. • The Lantana vermicompost is shown to be a good organic fertilizer. • FTIR studies identified Lantana’s toxic constituents destroyed by vermicomposting. • The findings have far-reaching implications in the gainful use of harmful weeds. - Abstract: In evidently the first study of its kind, vermicompost derived solely from a weed known to possess plant and animal toxicity was used to assess its impact on the germination and early growth of several plant species. No pre-composting or supplementation of animal manure was done to generate the vermicompost in order to ensure that the impact is clearly attributable to the weed. Whereas the weed used in this study, Lantana (Lantana camara), is known to possess strong negative allelopathy, besides plant/animal toxicity in other forms, its vermicompost was seen to be a good organic fertilizer as it increased germination success and encouraged growth of all the three botanical species explored by the authors – green gram (Vigna radiata), ladies finger (Abelmoschus esculentus) and cucumber (Cucumis sativus). In terms of several physical, chemical and biochemical attributes that were studied, the vermicompost appeared plant-friendly, giving best results in general when employed at concentrations of 1.5% in soil (w/w). Fourier transform infrared spectrometry revealed that the phenols and the sesquiterpene lactones that are responsible for the allelopathic impact of Lantana were largely destroyed in the course of vermicomposting. There is also an indication that lignin content of Lantana was reduced during its vermicomposting. The findings open up the possibility that the billions of tons of phytomass that is generated annually by Lantana and other invasives can be gainfully utilized in generating organic fertilizer via vermicomposting.

  15. Experimental and theoretical investigations of Lantana camara oil diffusion from polyacrylonitrile membrane for pulsatile drug delivery system

    Energy Technology Data Exchange (ETDEWEB)

    Verma, Vivek [Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008 (India); Balasubramanian, K., E-mail: meetkbs@gmail.com [Department of Materials Engineering, Defence Institute of Advance Technology (DIAT), Ministry of Defence, Girinagar, Pune 411025 (India)

    2014-08-01

    Porous composite membrane of polyacrylonitrile (PAN) and Lantana camara essential oil was synthesized by solvent casting method. Stability of oil in PAN solution was measured by XiGo nano tool indicating constant relaxation time of 1487 time/s. Pore size of few microns confirmed by electron microscopy was supported by atomic force microscopy indicating roughness factor of 0.9 nm. Contact angle of 2° inveterates superhydrophilicity of the composite membrane. Membrane showed excellent antibacterial activity against both Gram-positive Bacillus subtilis and Gram-negative Escherichia coli with a 7–10 mm zone of inhibition. In vitro release of Lantana oil from the composite membrane was carried out in isotonic phosphate buffer solution (pH = 7.4). Lantana oil was released for 9 h, lag time of 3 h with constant 33% release confirmed PAN membranes as potential system for pulsatile drug delivery applications. Diffusion of E-caryophyllene (antibacterial component of oil) which was studied through molecular simulation using Material Studio software ensued diffusion coefficient value of 1.11 ∗ 10{sup −9} m{sup 2}/s. Biocompatibility of the composite membrane was assessed by mouse embryonic fibroblast cell line (NIH 3T3) through MTT assay indicating more than 91% viable cell even at 200 μg/mL concentration. Such membranes can be efficiently used in biomedical applications as antibacterial and antifungal agent. - Highlights: • Pulsatile release • Lantana oil–PAN composite membrane as antibacterial material • Enhanced bactericidal activity of the membrane.

  16. Vermicomposting eliminates the toxicity of Lantana (Lantana camara) and turns it into a plant friendly organic fertilizer

    International Nuclear Information System (INIS)

    Highlights: • It is shown for the first time that Lantana can lose its toxicity when vermicomposted. • The Lantana vermicompost is shown to be a good organic fertilizer. • FTIR studies identified Lantana’s toxic constituents destroyed by vermicomposting. • The findings have far-reaching implications in the gainful use of harmful weeds. - Abstract: In evidently the first study of its kind, vermicompost derived solely from a weed known to possess plant and animal toxicity was used to assess its impact on the germination and early growth of several plant species. No pre-composting or supplementation of animal manure was done to generate the vermicompost in order to ensure that the impact is clearly attributable to the weed. Whereas the weed used in this study, Lantana (Lantana camara), is known to possess strong negative allelopathy, besides plant/animal toxicity in other forms, its vermicompost was seen to be a good organic fertilizer as it increased germination success and encouraged growth of all the three botanical species explored by the authors – green gram (Vigna radiata), ladies finger (Abelmoschus esculentus) and cucumber (Cucumis sativus). In terms of several physical, chemical and biochemical attributes that were studied, the vermicompost appeared plant-friendly, giving best results in general when employed at concentrations of 1.5% in soil (w/w). Fourier transform infrared spectrometry revealed that the phenols and the sesquiterpene lactones that are responsible for the allelopathic impact of Lantana were largely destroyed in the course of vermicomposting. There is also an indication that lignin content of Lantana was reduced during its vermicomposting. The findings open up the possibility that the billions of tons of phytomass that is generated annually by Lantana and other invasives can be gainfully utilized in generating organic fertilizer via vermicomposting

  17. In Vitro Pharmacological Activities and GC-MS Analysis of Different Solvent Extracts of Lantana camara Leaves Collected from Tropical Region of Malaysia

    Directory of Open Access Journals (Sweden)

    Mallappa Kumara Swamy

    2015-01-01

    Full Text Available We investigated the effect of different solvents (ethyl acetate, methanol, acetone, and chloroform on the extraction of phytoconstituents from Lantana camara leaves and their antioxidant and antibacterial activities. Further, GC-MS analysis was carried out to identify the bioactive chemical constituents occurring in the active extract. The results revealed the presence of various phytocompounds in the extracts. The methanol solvent recovered higher extractable compounds (14.4% of yield and contained the highest phenolic (92.8 mg GAE/g and flavonoid (26.5 mg RE/g content. DPPH radical scavenging assay showed the IC50 value of 165, 200, 245, and 440 μg/mL for methanol, ethyl acetate, acetone, and chloroform extracts, respectively. The hydroxyl scavenging activity test showed the IC50 value of 110, 240, 300, and 510 μg/mL for methanol, ethyl acetate, acetone, and chloroform extracts, respectively. Gram negative bacterial pathogens (E. coli and K. pneumoniae were more susceptible to all extracts compared to Gram positive bacteria (M. luteus, B. subtilis, and S. aureus. Methanol extract had the highest inhibition activity against all the tested microbes. Moreover, methanolic extract of L. camara contained 32 bioactive components as revealed by GC-MS study. The identified major compounds included hexadecanoic acid (5.197%, phytol (4.528%, caryophyllene oxide (4.605%, and 9,12,15-octadecatrienoic acid, methyl ester, (Z,Z,Z- (3.751%.

  18. Avaliação em MEV da fenda resultante da contração de polimerização da resina composta aplicada sobre diferentes materiais protetores pulpares = A sem evaluation of the gap resulting from the polymerization shrinkage of composite resins applied to different pulp protective materials

    Directory of Open Access Journals (Sweden)

    Unfer, Daniele Taís

    2006-01-01

    Full Text Available Introdução: A resina composta sofre contração como resultado da reação de polimerização que pode deslocar os materiais protetores pulpares, caso estes apresentem deficiente ou nenhuma adesão a dentina. Objetivo: avaliar o comportamento de dois materiais de proteção pulpar (CIV e CaOH2 cement em relação presença de fenda, quando submetidos a estresse de contração da resina composta e avaliar a fenda resultante da contração de polimerização entre dentina e resina composta. Metodologia: Foram confeccionados preparos classe V nas faces vestibular e lingual de 12 dentes molares humanos os quais foram divididos em quatro grupos de estudo, conforme a técnica restauradora e os materiais utilizados: G1 (SA + RC; G2 (HC + SA + RC; G3 (CIV + SA + RC e G4 (HC + CIV + SA + RC. Os corpos de prova foram avaliados em MEV e os dados obtidos foram submetidos análise não-paramétrica. Resultados: Os resultados obtidos mostram que os materiais de proteção pulpar utilizados são deslocados pela contração gerada pela polimerização da resina composta. Os melhores resultados (não presença de fenda foram demonstrados no grupo em que o sistema adesivo foi o único material entre a dentina e a resina composta. Quando do uso do CIV e do HC, associados ou não, foi encontrado o maior percentual de fendas. Conclusão: Os materiais de proteção pulpar continuarão a ser deslocados pela contração de polimerização das resinas compostas enquanto sua união à estrutura dental não apresentar suficiente resistência ou não se evitar a contração da resina composta

  19. 入侵植物马缨丹对4种农作物的化感作用%Allelopathy of Invasive Plant Lantana camara on four Receiver Plants

    Institute of Scientific and Technical Information of China (English)

    卢向荣; 谭忠奇; 林益明; 柴纬明; 周海超

    2013-01-01

    Lantana camara , Verbenaceae family, is one of the invasive alien plants. Previous study about the allelopathy of L. camara mainly focused on exudates from stem and leaf,however,few study analysed the allelopathy of root exudates. At present,with the increasing of L. camara invasion expands scales,the plant has been expanded into farmland gradually. The aims of this study is to determine the allelopathy of different concentrations of water extracts from L. camara leaf and root on the germination and seedling growth of Vigna radiata ,Brassica campestris , Triticum aestivum and Oryza sativa. Different parts and concentrations of water extracts from L. camara had different allelopathic effects on four receiver plants. Except the lowest concentration (2 mg/mL) had slight facilitation effects,other higher concentrations (20,50,100,200 mg/mL)showed significant inhibition effects and the inhibition increased with concentrations. The sensitivity of water extracts from L. camara was different among four tested species,B. campestris was sensitive to allelopathy of L. camara,while O. sativa was not. This study gave theoretical support for improving the competitiveness of crops aroud L. camara,and also provide a scientific foundation for control of current invasions and prevention of future invasions.%马缨丹(Lantana camara)是马鞭草科中一种入侵性极强的外来植物,为了明确马缨丹对入侵地农作物的化感作用,研究了不同浓度马缨丹叶片及根系水浸液对绿豆(Vigna radiata)、油菜(Brassica campestris)、小麦(Triticum aestivum)和水稻(Oryza sativa)种子萌发和幼苗生长的影响.结果表明,马缨丹不同部位及不同浓度水浸液对4种农作物化感效应不同,马缨丹水浸液对4种农作物的种子萌发及幼苗生长具有低质量浓度(2 mg/mL)轻微促进、中高质量浓度(20,50,100和200 mg/mL)较强烈的抑制作用,且随着水浸液浓度的升高其抑制效应不断增强.不同作物对马缨丹

  20. Creams formulated with Ocimum gratissimum L. and Lantana camara L. crude extracts and fractions as mosquito repellents against Aedes aegypti L. (Diptera: Culicidae).

    Science.gov (United States)

    Keziah, Ezeike Amarachi; Nukenine, Elias Nchiwan; Danga, Simon Pierre Yinyang; Younoussa, Lame; Esimone, Charles Okechukwu

    2015-01-01

    Mosquitoes are the most deadly vectors of parasites that cause diseases such as malaria, yellow fever, and filariasis. In view of the recent increased interest in developing plant origin insecticides as an alternative to chemical insecticides, the objective of this study was to determine the repellent activity of creams formulated with methanol crude extract (MCE), hexane fraction (HF), and ethyl acetate fractions (EAFs) of Ocimum gratissimum and Lantana camara leaves in single and combined actions against female Aedes aegypti. Evaluation was carried out in the net cages (30 by 30 by 30 cm) containing 60 blood-starved female mosquitoes each and were assayed in the laboratory condition following World Health Organization 2009 protocol. All formulations (single and mixture) were applied at 2, 4, 6, and 8 mg/cm(2) in the exposed area of human hands. Only acetone + white soft paraffin served as negative control and odomos (12% DEET) as positive control. All the formulations presented good protection against mosquito bites without any allergic reaction by the human volunteers. The repellent activity was dependent on the strength of the extracts and fractions. Among the tested formulations, the maximum protection time was observed in MCE (120 min) and EAF (150 min) of O. gratissimum; MCE:MCE (150 min) and HF:HF (120 min) mixtures of both plants. In addition, MCE:MCE and HF:HF mixtures from both plants showed possible synergistic effect. From the results, the combination of O. gratissimum and L. camara to formulate natural mosquito repellent using small amount of extracts can be encouraging to be an alternative to conventional DEET. PMID:25881633

  1. Pulpal response of dogs primary teeth to an adhesive system or to a calcium hydroxide cement Resposta pulpar de dentes decíduos de cães a um sistema adesivo ou ao cimento de hidróxido de cálcio

    Directory of Open Access Journals (Sweden)

    Rosângela Almeida RIBEIRO

    2000-03-01

    Full Text Available The aim of this study was to evaluate the pulpal response of dogs primary teeth to an adhesive system or to a calcium hidroxide cement after mechanic exposure of the pulp. Three mongrel dogs were used and ten class V cavities were prepared on their teeth. A mechanic pulp exposure was produced with a sterile exploratory probe in the central portion of each cavity and bleeding was controlled with dry sterile cotton pellets. Enamel, dentin and the site of the pulp exposure of five teeth were etched with 35% phosphoric acid followed by the application of an adhesive system (Scotchbond Multi-Purpose - 3M. In the other five teeth, calcium hydroxide cement (Hydro C - Dentsply was applied on the site of the pulp exposition before application of the adhesive system (Scotchbond Multi-Purpose - 3M. All teeth were restored with a resin composite (Z-100 - 3M. After 7, 30 or 45 days the dogs were anesthetized and perfused with saline followed by a solution of neutral buffered formalin. Maxilla and mandible were sectioned into three parts and placed in a solution for demineralization. Following bone demineralization, all teeth were cut, trimmed, embedded in paraffin and longitudinally cut. Then, the teeth were stained with hematoxilin and eosin and observed under a light microscope. The results obtained with the treatments proposed in this study showed the presence and persistence of an inflammatory response of different intensities at the three experimental periods. There was no variation in the inflammatory response regarding the different treatments performed.O objetivo deste estudo foi de avaliar a resposta pulpar de dentes decíduos de cães à um sistema adesivo ou a um cimento de hidróxido de cálcio após exposição mecânica da polpa. Foram utilizados três cães sem raça definida, e nestes foram realizados dez preparos cavitários classe V. Uma exposição pulpar mecânica foi produzida com uma sonda exploradora esterilizada, na porção central

  2. Effect of vermicast generated from an allelopathic weed lantana (Lantana camara) on seed germination, plant growth, and yield of cluster bean (Cyamopsis tetragonoloba).

    Science.gov (United States)

    Karthikeyan, M; Hussain, N; Gajalakshmi, S; Abbasi, S A

    2014-11-01

    In perhaps the first-ever study of its kind, the effect of vermicompost, derived solely from an allelopathic weed, on the germination, growth, and yield of a botanical species, has been carried out. In test plots, the soil was treated with the vermicompost of lantana (Lantana camara) at the rates of 5, 7.5, and 10 t ha(-1), and cluster bean (Cyamopsis tetragonoloba) was grown on it. The performance of these systems was compared with the systems in which the soil was fortified with inorganic fertilizers (IFs) in concentrations equivalent to those present in the respective vermicompost (VC) treatments. Additionally, a set of control was studied in which the soil was used without fortification by either VC or IF. It was seen that up to 51.5 % greater germination success occurred in the VC treatments compared to controls. VC also supported better plant growth in terms of stem diameter, shoot length, shoot mass, number of leaves, and leaf pigments. The positive impact extended up to fruit yield. In addition, vermicast application enhanced root nodule formation, reduced disease incidence, and allowed for a smaller number of stunted plants. The results indicate that allelopathic ingredients of lantana seem to have been totally eliminated during the course of its vermicomposting and that lantana vermicompost has the potential to support germination, growth, and fruit yield better than equivalent quantities of IFs. PMID:24946699

  3. Effect of vermicast generated from an allelopathic weed lantana (Lantana camara) on seed germination, plant growth, and yield of cluster bean (Cyamopsis tetragonoloba).

    Science.gov (United States)

    Karthikeyan, M; Hussain, N; Gajalakshmi, S; Abbasi, S A

    2014-11-01

    In perhaps the first-ever study of its kind, the effect of vermicompost, derived solely from an allelopathic weed, on the germination, growth, and yield of a botanical species, has been carried out. In test plots, the soil was treated with the vermicompost of lantana (Lantana camara) at the rates of 5, 7.5, and 10 t ha(-1), and cluster bean (Cyamopsis tetragonoloba) was grown on it. The performance of these systems was compared with the systems in which the soil was fortified with inorganic fertilizers (IFs) in concentrations equivalent to those present in the respective vermicompost (VC) treatments. Additionally, a set of control was studied in which the soil was used without fortification by either VC or IF. It was seen that up to 51.5 % greater germination success occurred in the VC treatments compared to controls. VC also supported better plant growth in terms of stem diameter, shoot length, shoot mass, number of leaves, and leaf pigments. The positive impact extended up to fruit yield. In addition, vermicast application enhanced root nodule formation, reduced disease incidence, and allowed for a smaller number of stunted plants. The results indicate that allelopathic ingredients of lantana seem to have been totally eliminated during the course of its vermicomposting and that lantana vermicompost has the potential to support germination, growth, and fruit yield better than equivalent quantities of IFs.

  4. Nasal septum resection due congenital thickness in foalsRessecção de septo nasal devido ao espessamento congênito em potros

    Directory of Open Access Journals (Sweden)

    Antônio Felipe Paulino de Figueiredo Wouk

    2012-04-01

    ão foi possível introduzir o equipamento na cavidade nasal devido à estenose bilateral. O exame radiográfico confirmou o aumento na espessura do septo nasal. Os animais foram submetidos à cirurgia de ressecção de septo. Para promover uma melhor condição respiratória a traqueostomia foi realizada nos dois potros antes da cirurgia. A técnica cirúrgica utilizada foi modificado da técnica descrita anteriormente DOYLE (2005. Inicialmente foi realizada a trepanação do osso nasal para osteotomia da porção caudal do septo, com auxilio de osteótomo modificado, sendo os limites dorsais e ventrais do septo removidos com uso de fio serra protegido por guias metálicos. Após a recuperação cirúrgica, nos dois casos, o exame clínico mostrou que o fluxo de ar estava normal e sem ruídos permitindo aos potros respirar normalmente. A traqueostomia cicatrizou por segunda intenção. Após oito meses os dois animais respiravam confortavelmente, estando aptos à atividade física. O exame histopatológico não demonstrou sinais de inflamação, neoplasia ou outro tipo de alteração histológica relacionada aos septos, sugerindo espessamento congênito.

  5. Technologies for the treatment of the sulfur dioxide and nitrogen oxides generated by the combustion in open chamber; Tecnologias para el tratamiento de dioxido de azufre y oxidos de nitrogeno generados por la combustion en camara abierta

    Energy Technology Data Exchange (ETDEWEB)

    Salazar Villalpando, Maria Dolores [Instituto Mexicano del Petroleo, Mexico, D. F. (Mexico)

    1992-12-31

    In general terms, there are only three ways of avoiding the sulfur dioxide and the nitrogen oxides, generated by the combustion in open chamber, from contaminating the air; the first one is utilizing low sulfur and nitrogen content fuels, the second one is by controlling the parameters that affect the combustion and the third one to treat and/or clean the gases before exhausting them to the air. In this document, some of the treatments for diminishing the pollutant emissions generated by the combustion in open chamber, are presented. [Espanol] En terminos generales, solo existen 3 maneras de evitar que el dioxido de azufre y oxidos de nitrogeno generados por la combustion en camara abierta sigan contaminando el aire, la primera es utilizar un combustible de bajo contenido de azufre y nitrogeno, la segunda es controlar los parametros que afectan la combustion, y la tercera es tratar y/o limpiar los gases antes de emitirlos a la atmosfera. En este documento se presentan algunos tratamientos para disminuir las emisiones de contaminantes generados por la combustion en camara abierta.

  6. Maternidade e hanseníase: as vivências de separação devido ao isolamento compulsório Being a mother with leprosy: the experiences of separation due to compulsory isolation

    OpenAIRE

    Suellen Santos Lima de Almeida; Leonardo Cançado Monteiro Savassi; Virgínia Torres Schall; Celina Maria Modena

    2012-01-01

    As mulheres portadoras de hanseníase, durante grande parte do século XX, não puderam exercer a maternidade devido à política de isolamento compulsório dos doentes adotada para controlar a doença. Os filhos ao nascerem eram levados para os preventórios e o contato com estes era realizado pelo olhar. Visando compreender a experiência da maternidade no hospital colônia foi realizada pesquisa narrativa com três mães que viveram o período de internação compulsória. Os discursos revelam dois moment...

  7. Variação térmica da câmara pulpar e do gel clareador bloqueador de infravermelho ativado com lâmpada halógena = Temperature changes of pulpal chamber and infrared-blocking bleaching gel activated with halogen light

    Directory of Open Access Journals (Sweden)

    Torres, Carlos Rocha Gomes

    2008-01-01

    Full Text Available Objetivo: Avaliar a temperatura da câmara pulpar (CP e do gel clareador bloqueador de infravermelho na superfície dental (SUP, durante a ativação com fotopolimerizadores com lâmpadas halógenas que emitem radiação na faixa do infravermelho (IV. Metodologia: Os géis clareadores Whiteness HP Maxx (com bloqueador de IV – MX e Whiteness HP (controle – CON foram aplicados em 10 incisivos centrais superiores. A ativação com luz foi realizada com os fotopolimerizadores (FP Optilight (600mW/cm2, OP e Jet Lite (1200mW/cm2, JL, sendo quatro ativações de 40s, sem intervalo (total de 3min e 20s. As temperaturas foram aferidas a cada 40s com um termômetro digital com dois termopares tipo K, um no interior da CP e outro na superfície dental (SUP. Os dados foram analisados com ANOVA a 3 fatores (tipo de gel – TG, FP e tempo de ativação e teste de Tukey. Resultados: Houve efeito significativo de TG e FP e para a interação FP/TG. As médias (DP (em graus Celsius foram: PC:[GT={MX-6,38(3,25a, CON-7,70(2,91b}, FC={OP- 5,51(2,54a, JL-8,56(2,93b}]; SUR: [GT={CON-9,85(3,89a, MX-14,21(7,76b}, FC={OP-7,32(2,50a, JL-16,74(5,82b}]. Conclusões: O gel bloqueador de IV resultou em menor aquecimento da CP e maior aquecimento do gel que o controle. O FP Jet Lite promoveu maior aquecimento que o Optilight

  8. Simulation and analysis of the tangential flow in the combustion chamber of a steam generator; Simulacion y analisis del flujo tangencial en la camara de combustion de un generador de vapor

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Ramirez, Isaias

    1997-06-01

    supplying ducts, were obtained, with a maximum discrepancy of 5.5 m/s between the data published by McKenty and Gravel (1997) and this analysis, for the case of combustion gases in the interior of the furnace. Temperature profiles were obtained, which were overestimated in the order of 417 Celsius degrees for the case of the temperature of gases in the center of the combustion chamber, when comparing them with the corresponding ones obtained by McKenty and Gravel (1997). It is speculated that this discrepancy must to be due to the omission of the connection of the radiation model to the global computational model and; the contours of concentration of species for the combustion products in the chamber were considered (carbon dioxide, oxygen and nitrogen), obtaining only the qualitative behavior of these. It is proposed as conclusion that the computational model developed in this thesis work can be used for the estimation of flow of fluids patterns, heat transference and transference of mass of a steam generator VU-60 of the tangential type and similar to the one taken as a base for this analysis. One improvement to the computational model developed could be achieved including the radiation effect, which requires a larger memory capacity of the computer hardware than the one available during the elaboration of this thesis. [Espanol] El presente trabajo de tesis describe la simulacion y analisis de la camara de combustion de un generador de vapor VU-60 del tipo tangencial, el cual esta basado en la solucion de la ecuacion generalizada de transporte, empleando modelos matematicos desarrollados para la caracterizacion de fenomenos fisicos para cerrar los sistemas de ecuaciones gobernantes. Para la solucion de los modelos matematicos y ecuaciones gobernantes se empleo el metodo de volumen finito, el cual se basa en el concepto de volumen de control. Se desarrollo un modelo computacional tridimensional por medio del cual se estimaron los perfiles de velocidad, presion, temperatura

  9. Clinical and pathological aspects of multicentric hemangiosarcoma in a Pinscher dog Sinais neurológicos multifocais devido ao hemangiossarcoma multicêntrico em um cão Pinscher: aspectos clínicos e patológicos

    Directory of Open Access Journals (Sweden)

    B.D.C. Martins

    2013-04-01

    Full Text Available A 3-year-old female Pinscher dog was presented with a history of lameness and pain in hind limbs for one week which acutely progressed to non-ambulatory paraparesis. The dog had been apathetic and anorexic during the six days prior to presentation. The neurological findings were compatible with upper motor neuron signs to the left hind limb due to a spinal cord compressive mass on the twelfth thoracic vertebral body. On the other hand, signs of lower motor neurons to the right hind limb were due to a mass with a pathological fracture in the right proximal femur, compressing the sciatic nerve. A histopathological analysis of all organs revealedthe proliferation of endothelial cells showingin filtrative growth and organization into vascular structures with a solid pattern. In addition, immunohistochemycal analysis revealed low proliferation index and citoplasmatic positivity for CD-31, confirming the vascular nature of the neoplasm. Clinical, histopathological and immunophenotipical findings were consistent with hemangiosarcoma.Uma cadela Pinscher de três anos de idade foi atendida em Hospital Veterinário Escola com histórico de dor nos membros pélvicos com progressão aguda para paraparesia não ambulatória. O animal estava apático e anoréxico há seis dias. Os achados neurológicos foram compatíveis com sinais de lesão de neurônios motores superiores para o membro pélvico esquerdo devido a uma massa no 12º corpo vertebral comprimindo a medula espinhal. Por outro lado, foram observados sinais de lesão de neurônios motores inferiores para o membro pélvico direito devido a uma fratura patológica no colo proximal do fêmur direito que comprimiu o nervo isquiático. Análises histopatológicas de todos os órgãos revelaram proliferação de células endoteliais com crescimento infiltrativo e organização sólida em estruturas vasculares. Adicionalmente, a análise imuno-histoquímica revelou baixa proliferação e marca

  10. Capacidade de abaixamento de temperatura da superfície interna da câmara pulpar após a aplicação do gás refrigerante à base de tetrafluoretano em dente extraído hígido e restaurado = Ability to decrease the temperature in the pulp chamber’s internal surface after the application of tetrafluorethane freezing gas on sound and restored extracted tooth

    Directory of Open Access Journals (Sweden)

    Irala, Luis Eduardo Duarte

    2007-01-01

    Full Text Available O sucesso do tratamento endodôntico está relacionado diretamente a um correto diagnóstico. Entre os recursos semiotécnicos empregados em Endodontia, o teste de vitalidade pulpar com gás refrigerante constitui auxílio clínico destinado a despertar resposta da polpa. Existem dificuldades de interpretação das respostas sensoriais em dentes portadores de restaurações, que podem agir como condutoras ou isolantes térmicos, diminuindo a acurácia do teste semiotécnico. Por isso, este estudo teve como intuito avaliar em um dente canino superior humano extraído a capacidade de abaixamento de temperatura da superfície interna da câmara pulpar após a aplicação do gás refrigerante à base de tetrafluoretano em três diferentes situações clínicas. No dente inicialmente hígido, posteriormente quando restaurado com amálgama e, finalmente, quando removida a restauração de amálgama e restaurado com resina composta. Quando o teste envolveu o dente restaurado com amálgama, o grau de abaixamento de temperatura foi maior, estatisticamente significativo, em relação às outras duas situações. No que concerne ao do tempo necessário para atingir a temperatura mínima, não existiram diferenças estatísticas significantes entre o dente hígido e o dente com amálgama, também não houve diferenças estatísticas entre o dente hígido e o dente com resina. Entretanto, o dente restaurado com resina e o dente restaurado com amálgama são diferentes estatisticamente. O amálgama foi o material que oportunizou o menor tempo para chegar à temperatura mais baixa. Ao executar um teste semiotécnico com spray refrigerante, o tempo e a intensidade das respostas dolorosas podem variar quando existe algum material a ser transposto na superfície dentária

  11. Maternidade e hanseníase: as vivências de separação devido ao isolamento compulsório Being a mother with leprosy: the experiences of separation due to compulsory isolation

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    Suellen Santos Lima de Almeida

    2012-08-01

    Full Text Available As mulheres portadoras de hanseníase, durante grande parte do século XX, não puderam exercer a maternidade devido à política de isolamento compulsório dos doentes adotada para controlar a doença. Os filhos ao nascerem eram levados para os preventórios e o contato com estes era realizado pelo olhar. Visando compreender a experiência da maternidade no hospital colônia foi realizada pesquisa narrativa com três mães que viveram o período de internação compulsória. Os discursos revelam dois momentos distintos da vivência de maternidade: a separação dos filhos com sua posterior volta para casa e a adoção de crianças para realizar a maternidade. Considera-se que a adoção promoveu o encontro com o sentido da existência que havia sido rompido e possibilitou a experiência de ser-mãe.In the twentieth century, women with leprosy could not carry on their maternity because of the statement of compulsory isolation of patients, adopted to control the disease. Their children were taken at birth to prevention centers and the contact of mothers with their babies was only visual. In order to understand the experience of maternity in the leprosaria it was carried out an investigated narrative research with three mothers who lived through the period of compulsory internment. The speeches reveal two distinct moments in the experience of motherhood: the separation of the children with their subsequent return to home and the adoption of other children to achieve motherhood. It is considered that the adoption has promoted the meeting with the meaning of existence that had been broken and allowed the experience of being a parent.

  12. Chemical composition of Lantana camara L. leaf essential oil and its biological activity to three insect pests%马缨丹叶片精油化学成分及其对三种害虫的生物活性

    Institute of Scientific and Technical Information of China (English)

    韩萌; 罗兰; 袁忠林; Ahn Young-Joon

    2016-01-01

    【目的】为探讨马缨丹Lantana camara L.叶片精油化学成分以及其对3种害虫的生物活性,以应用于生物防治。【方法】马缨丹叶片经水蒸气蒸馏法提取精油,产率为0.21%。经过气-质联用仪(GC-MS)分析,从马缨丹叶片精油中检测出主要的26种化合物,其中α-姜黄烯(α-curcumene,32.76%),β-石竹烯(β-caryophyllene,16.36%),石竹烯氧化物(Caryophyllene oxide,12.22%),桉油烯醇(Spathulenol,10.48%)含量较高,并对3种不同害虫进行生物活性测定。【结果】生物测定结果表明,马缨丹精油对米象Sitophilus oryzae成虫和Ⅳ龄埃及伊蚊Aedes aegypti幼虫的触杀效果显著,LC50分别为0.92 mg/cm2和32.33μg/mL。随着浓度的升高,对白蚁驱避作用增强,白蚁死亡率增加;高浓度精油对白蚁有触杀作用,但较低浓度对白蚁无显著影响。【结论】本研究证明马缨丹叶片精油对3种害虫有良好防治的效果。%[Objectives] To investigate the chemical composition of Lantana camara L.leaf essential oil, its biological activity to 3 insect pests, and its potential as a means of controlling insect pests. [Methods] L. camara leaf essential oil was extracted using the steam distillation method which gave a yield of 0.21%. The essential oil was examined using an Agilent GC-MS (gas chromatograph-mass spectrometer-computer) system. 26 major constituents were identified, but the major constituents wereα-curcumene (32.76%),β-caryophyllene (16.36%), caryophyllene oxide (12.22%) and spathulenol (10.48%). After analysis of the chemical composition of this essential oil, its biological activity to 3 insect pests was determined. [Results] The contact toxicity and repellent effect of L.camara leaf essential oil were tested on Sitophilus oryzae adults, fourth instar larvae of Aedes aegypti, and Reticulitermes flavipes worker. These bioassays showed that the essential oil had significant

  13. Peroneal nerve palsy due to compartment syndrome after facial plastic surgery Paralisia de nervo fibular devido a síndrome compartimental após cirurgia plástica da face

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    Clécio O. Godeiro-Júnior

    2007-09-01

    índrome compartimental crônica. Ele fazia uso de anabolizantes e venlafaxina, não relatado no início do quadro, e a agitação poderia ser explicada por uma síndrome serotoninérgia desencadeada pela interação deste último medicamento e haloperidol. A rabdomiólise secundária a estes eventos causou edema e isquemia nos compartimentos anteriores de ambos os membros inferiores, levando a uma compressão secundária do nervo fibular. O caso em questão ilustra a importância do diagnóstico precoce da síndrome compartimental pois, caso contrário, mesmo com fasciotomia, uma complicação permanente devido à compressão de nervos periféricos pode se estabelecer.

  14. Artrite séptica por Streptococcus bovis em paciente com cirrose hepática devido ao vírus da hepatite C: relato de caso e revisão de literatura Septic arthritis due to Streptococcus bovis in a patient with liver cirrhosis due to hepatitis C virus: case report and literature review

    OpenAIRE

    Ernesto Dallaverde Neto

    2011-01-01

    A monoartrite continua sendo diagnóstico desafiador para reumatologistas e ortopedistas. O autor descreve um caso de artrite séptica por Streptococcus bovis após vários episódios de derrame articular tratado com ácido hialurônico (hilano G-F 20) e acetato de metilprednisolona em paciente de 69 anos de idade portador de cirrose hepática devido ao vírus da hepatite C, sem presença de adenoma de cólon ou endocardite. Discutem-se as possibilidades diagnósticas para este caso de monoartrite, bem c...

  15. Análise matemática e biológica dos modelos de estimativa de perdas de rendimento na cultura devido à interferência de plantas daninhas Mathematical and biological analysis of the models for estimating culture yield losses due to weed interference

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    C. Adati

    2006-01-01

    Full Text Available As plantas daninhas acarretam reduções no rendimento das culturas agrícolas. Os modelos matemáticos de estimativa de perda de rendimento na cultura devido à interferência dessas plantas podem ser instrumentos úteis à tomada de decisão de manejo. Se for possível prever as perdas de rendimento, será possível decidir se é viável ou não a aplicação de uma medida de controle. Há na literatura vários modelos matemáticos empíricos de regressão lineares, não-lineares e polinomiais usados para estimar as perdas de rendimento devido às plantas daninhas. O presente trabalho teve como objetivo apresentar uma análise dos modelos matemáticos presentes na literatura utilizados para estimar as perdas de rendimento que as plantas daninhas acarretam à cultura, considerando o ajuste matemático às observações e a descrição biológica do comportamento dessas perdas.The presence of weeds in any production system involving plants causes crop yield losses. Mathematical models for crop yield loss estimation due to the interference of weeds can be useful tools for decision-making management strategies. If it is possible to predict crop yield loss, it will be possible to decide whether it is viable to apply control measures. There are several empirical models in the literature used to estimate crop yield loss due to the presence of weeds, which are linear, non linear and polynomial. The goal of this work is to present an analysis of the existing mathematical models used to estimate crop yield loss due to weeds by considering both their mathematical fit and biological behavior.

  16. Tentativa de infanticídio por um macho dominante de Alouatta caraya (Humboldt (Primates, Atelidae em um infante extra-grupo devido a influência do observador Infanticide attempt by a dominant male of Alouatta caraya (Humboldt (Primates, Atelidae against an extra-group infant due to the influence of the observer

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    Lucas M. Aguiar

    2005-12-01

    Full Text Available Este trabalho relata um caso de tentativa de infanticídio por um macho residente e dominante de um grupo de Alouatta caraya (Humboldt, 1812 em um infante extra-grupo, em ilha do rio Paraná, Paraná, Brasil. O encontro do par fêmea-infante com o macho residente foi propiciado pela interferência humana. Devido às circunstâncias em que ocorreu o fato e a posição hierárquica do agressor, a hipótese de patologia social pareceu plausível na explicação do comportamento.This work reports on an infanticide attempt by a dominant resident male in a group of Alouatta caraya (Humboldt, 1812 on an extra-group infant in an Island in the Paraná river, Paraná, Brazil. The encounter of an infant-female pair with a resident male was brought about by human interference. Give the circumstances in which the event ocurred and the hierarchical position of the agressor, the social pathology hypothesis seems the most plausible explanation for such behavior.

  17. Posição socioeconômica e duração do benefício por incapacidade devido a doenças musculoesqueléticas relacionadas ao trabalho Socioeconomic position and duration of disability benefit due to work-related musculoskeletal disorders

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    Norma Suely Souto Souza

    2012-02-01

    Full Text Available Neste estudo, estima-se o efeito da posição socioeconômica sobre a duração dos benefícios por incapacidade devido a doenças musculoesqueléticas. Dados de um inquérito conduzido pela Auditoria Regional do Instituto Nacional do Seguro Social, com todos os segurados que receberam benefício por incapacidade temporária por doenças musculoesqueléticas da região cervical e membros superiores, em 2008, juntamente com os registros administrativos, foram utilizados para formar uma coorte de 563 trabalhadores. Todos eram residentes em Salvador, Bahia. Entre os trabalhadores sindicalizados e com alta demanda psicossocial no trabalho, a posição socioeconômica se associava positivamente com a duração do benefício (RR = 1,89; IC95%: 1,25-2,87. Esses resultados correspondem ou a uma situação de iniquidade ou ao uso desnecessário do seguro pelos trabalhadores com posição socioeconômica alta. Investigações futuras que visem a elucidar as diferenças na utilização dos benefícios são necessárias para subsidiar a abordagem apropriada dessa questão pelos gestores do seguro social.This study estimated the effect of socioeconomic position on the duration of disability benefits due to musculoskeletal disorders affecting the neck and/or upper limbs. A cohort study including 563 insured workers from the city of Salvador, Bahia, Brazil, registered inthe General Social Security System and who received temporary disability benefits due to musculoskeletal disorders affecting the neck and/or upper limbs, , was performedin 2008 using data from the National Social Security Institute. The results show that among union member workers with high psychosocial demands at work, those with low socioeconomic status are almost twice as likely to receive benefit for a shorter period of time compared to those with a higher socioeconomic position (RR = 1.89; 95%CI: 1.25-2.87. These results reveal aninequitable situation or unnecessary use of insurance for

  18. Estimativas de evapotranspiração e as conseqüências devido aos erros na determinação de saldo de radiação e efeitos advectivos Evapotranspiration estimates and consequences due to errors in the determination of the net radiation and advective effects

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    Gertrudes Macario de Oliveira

    2000-12-01

    Full Text Available Objetivou-se com esse estudo, analisar as conseqüências nas estimativas da evapotranspiração (ET durante o ciclo de desenvolvimento de uma cultura de amendoim, devido aos erros cometidos na determinação do saldo de radiação (Rn e àqueles causados pelos efeitos advectivos. Esta pesquisa foi conduzida no perímetro irrigado da Estação Experimental da CODEVASF, na cidade de Rodelas, BA, no período de setembro a dezembro de 1996. Os resultados mostraram que erros no cálculo de Rn de até 2,2 MJ m-2 d-1 e, conseqüentemente, na estimativa da ET, podem ser cometidos dependendo do tempo considerado na totalização diária de Rn. Verificou-se, ainda, que tanto as áreas circunvizinhas próximas ao campo experimental, como as áreas de solos expostos entre fileiras dentro do próprio campo, contribuíram de forma significativa para a geração de advecção local de calor sensível e, portanto, para o aumento da evapotranspiração.The objective of this study was to analyze the consequences in the evapotranspiration estimates (ET during the growing cycle of a peanut crop due to the errors commited in the determination of the radiation balance (Rn, as well as those caused by the advective effects. This research was conducted at the Experimental Station of CODEVASF in an irrigated perimeter located in the city of Rodelas, BA, during the period of September to December of 1996. The results showed that errors of the order of 2.2 MJ m-2 d-1 in the calculation of Rn, and consequently in the estimate of ET, can occur depending on the time considered for the daily total of Rn. It was verified that the surrounding areas of the experimental field, as well as the areas of exposed soil within the field, contributed significantly to the generation of local advection of sensible heat, which resulted in the increase of the evapotranspiration.

  19. As possíveis alterações microclimáticas devido a formação do lago artificial da hidrelétrica de Tucuruí -PA The possible impacts on the microclimate due to the artificial lake from Tucuruí's dam

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    Fabio Sanches

    2005-01-01

    Full Text Available Existem muitas preocupações ecológicas do impacto que a construção de grandes lagos na Amazônia podem provocar, principalmente relacionadas ao microclima. Este estudo visa aumentar o conhecimento científico sobre a distribuição de chuvas antes e depois da formação do lago artificial da UHE Tucuruí-PA. Foram utilizados dados diários de precipitação dos períodos de 1972 a 1983 (pré-enchimento e de 1984 a 1996 (pós-enchimento para as cidades de Tucuruí e Marabá-PA. Comparando-se os totais mensais (pré e pós-enchimento, não se observam diferenças estatisticamente significantes (foram aplicados os testes de Fisher e Man-Whitney. Analisando-se a ocorrência de dias com precipitação superior a 5 e 25 mm.dia-1, também não se observam diferenças estatisticamente significativas. Há um leve aumento do número de dias com chuvas leves no final período sêco após a formação do lago, talvez devido a alta evaporação do lago artificial. Também não se observou modificações do início ou final da estação chuvosa.There are a lot of ecological concern about the ecological impacts due to an artificial lake in Amazonia, especially related with the microclimate. This study aims to increase the scientific knowledge of the rainfall distribution prior and post flooding of the UHE Tucuruí-PA. Daily rainfall from 1972 until 1983 (prior inundation and from 1984 until 1996 (post inundation for Tucuruí and Marabá-PA. Comparing the monthly totals (prior and post, there is no statistical differences between the averages (using the statistical tests from Fisher and Man-Whitney. Analyzing the number of days with rainfall higher than 5 and 25 mm.day-1, there are also no statistical differences. It was observed a small increase of light rain during the end of the dry season. Also, the are no signal related to the modification of the onset or end from the rainy season.

  20. Aplicação de programa educativo multidisciplinar em gestações de alto risco devido a doenças endócrinas Application of multidisciplinary educational program in high-risk pregnancies due to endocrine diseases

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    Alina Coutinho Rodrigues Feitosa

    2010-10-01

    Full Text Available OBJETIVO: avaliar a aplicação de um programa de intervenção multidisciplinar educativo em mulheres com gestação de alto risco devido a doenças endócrinas. MÉTODOS: avaliamos retrospectivamente a aplicação de um programa educativo multidisciplinar em 185 gestantes com doenças endócrinas referenciadas para uma maternidade especializada em gestação de alto risco. As gestantes receberam atenção pré-natal multidisciplinar por times compostos por endocrinologistas, obstetras, ultrassonografistas, enfermeiras e nutricionistas. Informações orais e escritas sobre hábitos saudáveis, cuidados com diabetes, uso de adoçantes artificiais e exercícios na gestação foram passadas na primeira consulta endocrinológica. Plano nutricional individualizado foi feito em primeira visita à nutricionista. Nas reavaliações mensais com nutricionista e quinzenais com endocrinologista, as informações sobre mudanças saudáveis no estilo de vida eram reforçadas e o peso registrado. O grau de aderência à dieta e atividade física foi autorreferido. Comparou-se o peso semanal antes e após a intervenção multidisciplinar, peso fetal ao nascimento, taxa de macrossomia e baixo peso, e a frequência de parto cesário nas quatro categorias de índice de massa corpórea (IMC pré-gestacional (30 kg/m². RESULTADOS: a principal patologia de encaminhamento foi o diabetes (84,9%. Um terço das gestantes (31,2% era composto por portadoras de sobrepeso e 42,5% tinham obesidade pré-gestacional. A maior parte das gestantes foi vista pela primeira vez pela equipe multidisciplinar no terceiro trimestre (64,1%, e 50,5% delas excederam o ganho de peso recomendado para toda a gestação à primeira avaliação. Gestantes obesas excederam o ganho de peso recomendado em 62,5% dos casos. Após a intervenção multidisciplinar, o percentual de gestantes que excedeu o ganho de peso semanal recomendado reduziu em todas as categorias de IMC pré-gestacional (IMCPG

  1. Evaporação líquida no lago de Sobradinho e impactos no escoamento devido à construção do reservatório Net evaporation in Sobradinho dam and impacts on runoff due to the construction of the reservoir

    Directory of Open Access Journals (Sweden)

    Silvio B. Pereira

    2009-06-01

    Full Text Available Um dos problemas que dificultam a gestão de recursos hídricos, são as perdas de água por evaporação nos reservatórios de regularização, fazendo com que estimativas confiáveis de evaporação nos reservatórios sejam essenciais, tanto no planejamento e gerenciamento dos recursos hídricos, quanto em estudos de impacto ambiental. Com base neste enfoque objetivou-se, através do trabalho ora apresentado, estimar a evaporação líquida no lago de Sobradinho por meio da metodologia do tanque Classe A e dos modelos Linacre (1993, Kohler et al. (1955 e CRLE, além dos impactos ocorridos nas condições de escoamento devido à construção do reservatório. Os resultados permitiram concluir que: a construção do reservatório de sobradinho alterou sensivelmente o comportamento hidrológico do rio São Francisco à jusante da mesma; os valores obtidos pelo modelo Kohler et al. (1955 podem ser utilizados como base de referência para a estimativa da evaporação média anual do lago de Sobradinho; o coeficiente de tanque Classe A que melhor representou a variação sazonal de evaporação no lago de Sobradinho foi de 0,57; finalmente, a vazão média anual correspondente à evaporação líquida do reservatório de Sobradinho foi de 132 m³ s-1.Losses of water by evaporation in regulatory reservoirs are one of the problems that exist in water resources management, the reliable estimates of evaporation in the reservoirs becoming essential not only in the planning and administration of the water resources but also in studies of environmental impact. The objective of this paper was to estimate the net evaporation in the Sobradinho dam through the Class A tank methodology and the Linacre (1993, Kohler et al. (1955 and CRLE models, as well as to verify the impacts on the flow conditions due to the construction of the reservoir. The results showed that: the construction of the Sobradinho reservoir, associated to the other activities developed in the

  2. Metodología para estudios histológicos pulpares en ratas

    OpenAIRE

    Cortés Lillo, Olga; Boj Quesada, Juan Ramón; Canalda Sahli, Carlos; C. García Ballesta

    2001-01-01

    La pulpotomía es uno de los tratamientos más frecuentes en odontopediatría, siendo hasta ahora el formocresol el fármaco más frecuentemente utilizado, pero su uso está siendo discutido debido a su potencial toxicidad. Existen distintas alternativas; agentes como el glutaraldehído y el sulfato férrico, materiales biocompatibles como el colágeno, hueso liofilizado y proteínas morfogenéticas formadoras de hueso, o técnicas como la electrocoagulación o la aplicación de láser. Por ello, son fundam...

  3. Changes in the internal resistance of a single chamber microbial fuel cell associated with architectural changes and inoculation; Cambios en la resistencia interna de una celda de combustible microbiana de una camara asociados a cambios de arquitectura y tipo de inoculo

    Energy Technology Data Exchange (ETDEWEB)

    Vazquez Larios, A.L.; Vazquez-Huerta, G.; Esparza-Garcia, F.; Solorza-Feria, O.; Poggi Varaldo, H.M. [Centro de Investigacion y de Estudios Avanzados del IPN, Mexico D.F. (Mexico)]. E-mail: hectorpoggi2001@gmail.com; linevazquez@yahoo.com.mx

    2009-09-15

    The objective of this work was to electrochemically characterize a new type of microbial fuel cell (MFC-A) and evaluate the effect of three inoculated types on internal resistance (Ir). The results were compared with those from a standard fuel cell (MFC-B). The MFC-A consisted of a horizontal acrylate cylinder equipped with two sandwiched electrode systems (each with a anode proton exchange membrane-cathode) at each end of the chamber. The MFC-B consisted of an anode and cathode each placed at opposing faces of the chamber, separated by 78 mm. The Ir of the cells were determined using a polarization curve. The inoculates were from continuous complete-mix reactors, biomass in suspension, at the laboratory scale. The inoculate with the lowest Ir value (1 200 and 3900 {Omega}) was sulfate reduction (SR-In). The second corresponded to methanogen inoculated cells (M-In) with Ir of 5300 and 7500 {Omega}. Aerobic inoculated cells (A-IN) had extremely high Ir values, 100000 and 130000 {Omega} for MFC-A and MFC-B, respectively. The Ir for all the inoculates was the lowest in the MFC-A, attributed to the change in the cell's architecture and the design of the electrodes. These results are encouraging since a decrease in Ir is required to increase the power and efficiency of a microbial fuel cell. [Spanish] El objetivo de este trabajo fue caracterizar electroquimicamente una celda de combustible microbiana de nuevo tipo (CCM-A), y evaluar el efecto de tres tipos de inoculos sobre la resistencia interna (R{sub i}). Los resultados fueron comparados con los de una celda de combustible estandar (CCM-B). La CCM-A consistio de un cilindro horizontal de acrilato, equipado con dos sistemas de electrodos emparedados (cada uno con catodo/membrana de intercambio protonico/anodo) en cada uno de los extremos de la camara. La CCM-B consistio de un anodo y un catodo colocados cada uno en las caras opuestas de la celda, separados por 78 mm. Las Ri de las celdas fueron determinadas por

  4. Gridded Ionization Chamber; Camara de ionizacion con reja

    Energy Technology Data Exchange (ETDEWEB)

    Manero Amoros, F.

    1962-07-01

    In the present paper the working principles of a gridded ionization chamber are given, and all the different factors that determine its resolution power are analyzed in detail. One of these devices, built in the Physics Division of the JEN and designed specially for use in measurements of alpha spectroscopy, is described. finally the main applications, in which the chamber can be used, are shown. (Author) 17 refs.

  5. Aborto em bovinos devido à intoxicação por Tetrapterys acutifolia (Malpighiaceae

    Directory of Open Access Journals (Sweden)

    Saulo A. Caldas

    2011-09-01

    Full Text Available Esse estudo teve por objetivo demonstrar experimentalmente que Tetrapterys acutifolia Cav. (fam. Malpighiaceae é capaz de provocar aborto em bovinos e caracterizar as alterações clínico-patológicas nas vacas e nos fetos. Estas plantas são responsáveis por significativo número de mortes em bovinos com mais de um ano de idade, especialmente nos Estados de Rio de Janeiro e São Paulo, mas até agora não havia sido comprovado experimentalmente seu efeito abortivo em bovinos. Os experimentos foram realizados no município de Barra do Piraí, RJ. Quatro vacas de descarte receberam brotos e folhas novas frescas de T. acutifolia, coletadas em propriedades vizinhas, nas doses de 2,5g/kg/dia, 5,0g/kg/dia (2 vacas e 10g/kg/dia, até ocorrer o abortamento. O quadro clínico nas vacas caracterizou-se por arritmia cardíaca, tremores musculares, anorexia, ascite, jugular ingurgitada, edema de peito e barbela e aborto (23-76 dias após o início da ingestão da planta; todas as vacas abortaram. Das quatro vacas apenas uma (a que recebeu 10g/kg/dia morreu 36 dias após o abortamento, com sintomas de insuficiência cardíaca. O exame necroscópico dos fetos/natimortos revelou hidrotórax, hidropericárdio, hidroperitônio e congestão hepática; ao corte do miocárdio, verificaram-se áreas pálidas. No exame histológico havia edema intersticial com fibrose incipiente. Na vaca que recebeu a maior dose e foi a óbito, bem como em outra intoxicada naturalmente, os achados de necropsia foram similares aos observados nos fetos, exceto pela dilatação dos vasos da base do coração e mais acentuada palidez do miocárdio. Observaram-se ainda edema subcutâneo nas regiões cervical e esternal, bem como veias jugulares ingurgitadas. Os achados histopatológicos foram necrose e edema intersticial com acentuada fibrose no miocárdio, espongiose da substância branca do encéfalo e, no fígado, congestão e leve fibrose. Adicionalmente, observou-se na vaca intoxicada espontaneamente, 17 dias após o aborto, arritmia cardíaca, jugular ingurgitada, edema de peito e barbela, anorexia com morte 43 dias após o aborto. Este estudo demonstra que Tetrapterys acutifolia é capaz de induzir aborto e, dependendo da dose, ainda causar a morte das vacas que abortarem.

  6. Public exposure due to the transport of radiopharmaceuticals; Exposicao do publico devido ao transporte de radiofarmacos

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Demerval L.; Carneiro, Janete C.G.G.; Sanches, Matias P.; Sordi, Gian Maria A.A., E-mail: dlrodri@ipen.b, E-mail: janetegc@ipen.b, E-mail: msanches@ipen.b, E-mail: gsordi@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-10-26

    This paper estimate the radiological impact resulting from radiopharmaceuticals transport from the IPEN to some destinations defined a priori. So, doses were estimated in the public individuals, which are in the streets and vehicles that transit near the public transport, alongside the itinerary went through by packages, during the realization of radiopharmaceuticals transport

  7. Accumulation and percolation of phosphorus in the soil due to the application of wastewater from swine farming in maize culture (Zea mays L. Acumulacion y percolocación de fósforo en suelo devido a la aplicación resíduos de agua de la suinocultura en la ciltura del maíz.(Zea mays L. Acúmulo e percolação de fósforo no solo devido à aplicação de água residuária de suinocultura na cultura do milho (Zea mays L.

    Directory of Open Access Journals (Sweden)

    Miguel Angel Uribe Opazo

    2009-12-01

    , of the percolating soil and water to the groundwater. We evaluated five blades of ARS (0, 112.5, 225, 337.5 and 450 m3 ha-1 per cycle, combined with two fertilization of soil (50 and 75% in Latossolo Vermelho distroférrico cultivated with maize. It was observed that the higher blades of ARS show greater accumulation of phosphorus in the soil. For the percolate, the indices of phosphorus found do not present risk of contamination to the water.
    A suinocultura é considerada pelos órgãos ambientais como uma atividade potencialmente causadora de degradação ambiental. Nos últimos anos, na região oeste do Paraná, o uso da água residuária de suinocultura (ARS na fertirrigação de culturas tem aumentado, o que melhora as condições do solo devido ao fornecimento de nutrientes, além de economizar custos com fertilização e água potável. Um dos elementos que constituem a ARS é o fósforo que, quando em excesso, pode comprometer a qualidade do ambiente, como um contaminante da água. O objetivo deste trabalho foi avaliar a melhor lâmina de ARS, usada para fertirrigação, que ocasione menor contaminação, por fósforo, do solo e da água que percola para o lençol freático. Foram avaliadas cinco lâminas de ARS (0; 112,5; 225; 337,5 e 450m3 ha-1 por ciclo, combinadas com duas adubações de solo (50 e 75%, em Latossolo Vermelho distroférrico cultivado com milho. Observou-se que as maiores lâminas de ARS apresentam maior acúmulo de fósforo no solo. Para o percolado, os índices de fósforo encontrados não apresentam riscos de contaminação para os mananciais.

  8. Imprinting genómico na espermatogénese anormal devido a paragem meiótica

    OpenAIRE

    Marques, Patrícia Isabel Ferreira

    2009-01-01

    O imprinting genómico é um mecanismo epigenético, no qual os alelos parentais são expressos diferencialmente, resultando em expressão monoalélica dos genes imprinted. Uma das marcas de imprinting é a metilação do DNA em dinucleótidos CpG, que permite a transcrição ou repressão dos genes. Na linha germinal masculina, as marcas de imprinting herdadas são apagadas e são restabelecidas as marcas paternas. A infertilidade masculina é um problema que afecta muitos casais, podendo ter várias caus...

  9. ANÁLISE DE FALHAS NO PROCESSO LOGÍSTICO DEVIDO A FALTA DE UM CONTROLE DE QUALIDADE

    Directory of Open Access Journals (Sweden)

    Juliana Barreto

    2005-06-01

    conformidade dos produtos.  A aplicação das Ferramentas da Qualidade Total como o Diagrama de Ishikawa e o Ciclo PDCA  foram possíveis detectar os processos que possuem falhas, permitindo a correção.  Com essas implantações, os resultados se darão em médio prazo, porém as empresas potencializarão seu diferencial competitivo ao entregarem produtos com baixo índice de avarias. Através de comparações entre duas empresas do  ramo moveleiro, foi possível detectar falhas no sistema logístico, para o qual foi sugerida e implantada o Controle de Qualidade, auxiliado pelas ferramentas da Qualidade com o objetivo principal de minimizar os custos decorrentes de danificações de produtos das empresas em estudo.

  10. Mortalidade devido a acidentes de bicicletas em Pernambuco, Brasil Mortality due to bicycle accidents in Pernambuco, Brazil

    Directory of Open Access Journals (Sweden)

    Reginaldo Inojosa Carneiro Campello

    2013-05-01

    Full Text Available O artigo tem por objetivo analisar os casos de morte nos acidentes com bicicleta ocorridos em Pernambuco entre 2001 e 2010. Este estudo quantitativo analisou dados secundários. A amostra consistiu de todas as Declarações de Óbitos registradas no Sistema de Informação de Mortalidade do Banco de Dados do Sistema Único de Saúde que relataram acidentes de bicicleta entre 2001 e 2010. Medidas descritivas foram determinadas para todas as variáveis. As sociodemográficas foram cruzadas com a causa básica de morte em busca de correlação estatística. Em Pernambuco, no citado sistema de informação, foram registradas 517 Declarações de Óbitos decorrentes de acidentes de bicicleta, sendo nestes sinistros a participação mais frequente de homens, entre 25-59 anos, pardos, solteiros e de escolaridade ignorada. A idade média foi de 36,82 anos (desvio padrão = 17,026, sendo a idade mínima e a máxima, respectivamente, 4 e 86 anos. Os achados apontam para a necessidade da criação de infraestrutura adequada e de medidas legais efetivas para prevenir acidentes de tráfego envolvendo este tipo de veículo, apoiando-se na evidência de distribuição de casos na maioria dos municípios de Pernambuco.The scope of this paper was to conduct a quantitative analysis of deaths resulting from bicycle accidents in the state of Pernambuco by studying secondary data between 2001 and 2010. The sample consisted of all the Deaths recorded in the Mortality Information System of the Unified Health System Database that reported bicycle accidents between 2001 and 2010. Descriptive measures were determined for all variables. Socio-demographic variables were paired with the basic cause of death in order to find a statistical correlation. In Pernambuco, the aforementioned information system recorded 517 deaths resulting from bicycle accidents, with greater frequency in men between 25 and 59 years of age, Afro-Brazilians, single and of unknown schooling. The mean age was 36.82 years (SD = 17.026, and the minimum and maximum age of 4 and 86 years old, respectively. The findings highlight the need for the creation of adequate infrastructure and effective legal measures to prevent traffic accidents involving this type of vehicle, relying on the evidence of distribution of cases in most Pernambuco municipalities.

  11. Quantum effects due to coordinate non-inertial systems; Efeitos quanticos devidos a sistemas nao inerciais de coordenadas

    Energy Technology Data Exchange (ETDEWEB)

    Mueller, Daniel

    1996-12-31

    In chapter 1 we make an introduction to quantum fields in curved spaces, mentioning something about fermions. Chapter 2 begins a brief introduction to General Relativity, and the calculation of the linearized limit to obtain Thirring`s metric, which is a first approximation to the Kerr metric. In Chapter 3 we calculate Dirac`s equation in Thirring`s space-time and work out the non relativistic limit obtaining the modifications in Schroedinger`s equation resulting from the geometry. Particularly, we observe the interference of a particle beam. And in Chapter 4, we present a revision of classical and quantum detectors and discuss the response of detectors in non-inertial motion, in particular, for uniform acceleration and uniform circular motion. The latter is known to yield and integral for the response function which has been so far carried out only numerically. We propose a semi-analytical solution for the spectrum of a circular moving detector. We consider c=1. (author) 27 refs., 4 figs.

  12. Calibration of well-type ionization chambers; Calibracao de camaras de ionizacao do tipo poco

    Energy Technology Data Exchange (ETDEWEB)

    Alves, C.F.E.; Leite, S.P.; Pires, E.J.; Magalhaes, L.A.G.; David, M.G.; Almeida, C.E. de, E-mail: cfealves@gmail.com [Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil). Lab. de Ciencias Radiologicas; Di Prinzio, R. [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2015-07-01

    This paper presents the methodology developed by the Laboratorio de Ciencias Radiologicas and presently in use for determining of the calibration coefficient for well-type chambers used in the dosimetry of {sup 192}Ir high dose rate sources. Uncertainty analysis involving the calibration procedure are discussed. (author)

  13. LA CERTIFICACION DE LA COSTUMBRE MERCANTIL EN LA JURISDICCION DE LA CAMARA DE COMERCIO DE TUNJA

    OpenAIRE

    Castro Santiago, Doris

    2014-01-01

    Las políticas actuales que orientan la actividad académica universitaria, han establecido la trilogía docencia, investigación y extensión a la comunidad, como los pilares sobre los cuales debe fundamentarse su quehacer.

  14. Characteristic parameters of drift chambers calculation; Calculo de los parametros caracteristicos de camaras de deriva

    Energy Technology Data Exchange (ETDEWEB)

    Duran, I.; Martinez-Laso, L.

    1989-07-01

    We present here the methods we used to analyse the characteristic parameters of drift chambers. The algorithms to calculate the electric potential in any point for any drift chamber geometry are presented. We include the description of the programs used to calculate the electric field, the drift paths, the drift velocity and the drift time. The results and the errors are discussed. (Author) 7 refs.

  15. Fog camera to visualize ionizing charged particles; Camara de niebla para visualizar particulas cargadas ionizantes

    Energy Technology Data Exchange (ETDEWEB)

    Trujillo A, L.; Rodriguez R, N. I.; Vega C, H. R., E-mail: ingtrujilloa@hotmail.com [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico)

    2014-10-15

    The human being can not perceive the different types of ionizing radiation, natural or artificial, present in the nature, for what appropriate detection systems have been developed according to the sensibility to certain radiation type and certain energy type. The objective of this work was to build a fog camera to visualize the traces, and to identify the trajectories, produced by charged particles with high energy, coming mainly of the cosmic rays. The origin of the cosmic rays comes from the solar radiation generated by solar eruptions where the protons compose most of this radiation. It also comes, of the galactic radiation which is composed mainly of charged particles and gamma rays that comes from outside of the solar system. These radiation types have energy time millions higher that those detected in the earth surface, being more important as the height on the sea level increases. These particles in their interaction produce secondary particles that are detectable by means of this cameras type. The camera operates by means of a saturated atmosphere of alcohol vapor. In the moment in that a charged particle crosses the cold area of the atmosphere, the medium is ionized and the particle acts like a condensation nucleus of the alcohol vapor, leaving a visible trace of its trajectory. The built camera was very stable, allowing the detection in continuous form and the observation of diverse events. (Author)

  16. Blasting forward in underground work; Voladuras de camara de la mina de Aguas Tenidas

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Maneiro, C. H.; Maqueda Jimenez, S.; Pazos Perez, L.; Carnero Ortiz, F.

    2012-11-01

    This paper explains the drilling and blasting techniques of stopes in Aguas Tenidas Mine (Huelva, Spain), including slot raises and slots. Highights are: application of electronic detonators and a 30'' hole in slot raise blasts, ANFO uphole chrging of 89 mm holes and high productive fan drillin, in order to maintain stoping production of 150.000 t/month. (Author)

  17. Desmoplastic ameloblastoma mimicking a periapical lesion = Ameloblastoma desmoplásico mimetizando lesão periapical

    Directory of Open Access Journals (Sweden)

    Santos, Esaú Pinheiro dos

    2010-01-01

    Full Text Available Ameloblastoma desmoplásico (AD é uma rara variante do ameloblastoma, com características clínicas, imaginológicas e histopatológicas específicas. O perfil biológico deste tumor não é totalmente compreendido, devido ao número limitado de casos notificados. O objetivo deste trabalho é relatar um caso de AD simulando uma lesão periapical. Este tumor apareceu na região anterior da maxila esquerda numa paciente do gênero feminino de 24 anos de idade, entre o incisivo lateral esquerdo e o canino. A lesão era indolor e apresentava apenas um ligeiro inchaço da mucosa do palato duro. Radiograficamente, uma área radiolúcida bem delimitada que promovia a divergência radicular foi observada. O incisivo lateral respondeu negativamente aos testes pulpares. Diagnóstico provisório de cisto radicular versus cisto fissural foi estabelecido e enucleação cirúrgica seguida de curetagem foi realizada. O exame histológico das amostras revelou a proliferação dos ninhos e cordões de epitélio odontogênico comprimido imersos em um estroma densamente colagenizado, associada a um trabeculado ósseo levemente irregular. Estas características eram consistentes com AD. A necrose pulpar do incisivo e o aparecimento radiográfico atípico, deixava a doença em absconso. Apesar das altas taxas de recorrência, nenhum sinal clínico ou radiográfico de recidiva do tumor foi detectado um ano mais tarde

  18. Verification of the stability of the well-chamber electrometer measures compared with cylindrical chamber; Verificacion de la estabilidad del conjunto camara pozo-electrometro por comparacion con medidas con camara cilindrica

    Energy Technology Data Exchange (ETDEWEB)

    Rincon Perez, M.; Garcia Castejon, M. A.; Gomez-Tejedor Alonso, S.; Penedo Cobos, J. M.

    2011-07-01

    The recommended detector for calibration of brachytherapy is fluent in a number of well-chamber electrometer with the appropriate insert (CPEi) To maintain traceability is necessary to periodically check the constancy of the response of the CPEi, so as to ensure the correct operation of the set and there is no drift due to aging. According to Royal Decree 1566/1998 on establishing quality criteria in Radiotherapy Teams that provide a benchmark for measuring various physical quantities (such as the CPEi for measuring the source TKRA Ir-192) must be traced to national or international national recognition through periodic calibration metrology laboratories recognized. Due to the absence of national laboratories accredited for the calibration set of well-chamber electrometer is useful to find an alternative method to ensure that traceability. This paper develops a procedure to achieve this by comparing measurements made with this set and measured with an ionization chamber of Farmer type 0.occ a team of high dose rate Ir-192 (HDR). (Author)

  19. Development of maleated starches using an internal mixer;Obtencao de amidos maleatados em camara de mistura

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Fernanda T.G.; Andrade, Cristina T., E-mail: fesitabr@yahoo.com.b, E-mail: ctandrade@ima.ufrj.b [Universidade Federal do Rio de Janeiro (IMA/UFRJ), RJ (Brazil). Inst. de Macromoleculas Profa. Eloisa Mano; Souza, Roberta C.R., E-mail: roberta.souza@poland.com.b [Poland Quimica Ltda, Duque de Caxias, RJ (Brazil)

    2009-07-01

    Novel maleated starches (MSt) were prepared by chemical modification of cornstarch with maleic anhydride (MA), using an internal mixer as a reactor. Benzoyl peroxide (BPO) was chosen as initiator. Physico-chemical parameters were determined for the process carried out at different MA contents, under the same reaction conditions. Processing was carried out at 50 deg C, 30 rpm for 8 min.Torque developed during processing was given by the digital display of the rheometer, and the total specific mechanical energy (SME) input was estimated. FTIR measurements confirmed the successful incorporation of MA into the starch backbone. In addition, WAXS diffraction analyses revealed disruption of the crystalline structure of native starch for the products. Such reactions promoted by MA reduced the crystallinity of the products. The results indicated that the MA content had a significant effect on the characteristics of the processed starch samples. (author)

  20. Conditioning of the vacuum chamber of the Tokamak Novillo; Acondicionamiento de la camara de vacio del Tokamak Novillo

    Energy Technology Data Exchange (ETDEWEB)

    Valencia A, R.; Lopez C, R.; Melendez L, L.; Chavez A, E.; Colunga S, S.; Gaytan G, E

    1992-03-15

    The obtained experimental results of the implementation of two techniques of present time for the conditioning of the internal wall of the chamber of discharges of the Tokamak Novillo are presented, which has been designed, built and put in operation in the Laboratory of Plasma Physics of the National Institute of Nuclear Research (ININ). These techniques are: the vacuum baking and the low energy pulsed discharges, which were applied after having reached an initial pressure of the order of 10{sup -7} Torr. with a system of turbomolecular pumping previous preparation of surfaces and vacuum seals. The analysis of residual gases was carried out with a mass spectrometer before and after conditioning. The obtained results show that the vacuum baking it was of great effectiveness to reduce the value of the initial pressure in short time, in more of a magnitude order and the low energy discharges reduced the oxygen at worthless levels with regard to the initial values. (Author)

  1. Design, construction and testing of a radon experimental chamber; Diseno, construccion y pruebas de una camara experimental de radon

    Energy Technology Data Exchange (ETDEWEB)

    Chavez B, A.; Balcazar G, M

    1991-10-15

    To carry out studies on the radon behavior under controlled and stable conditions it was designed and constructed a system that consists of two parts: a container of mineral rich in Uranium and an experimentation chamber with radon united one to the other one by a step valve. The container of uranium mineral approximately contains 800 gr of uranium with a law of 0.28%; the radon gas emanated by the mineral is contained tightly by the container. When the valve opens up the radon gas it spreads to the radon experimental chamber; this contains 3 accesses that allow to install different types of detectors. The versatility of the system is exemplified with two experiments: 1. With the radon experimental chamber and an associated spectroscopic system, the radon and two of its decay products are identified. 2. The design of the system allows to couple the mineral container to other experimental geometries to demonstrate this fact it was coupled and proved a new automatic exchanger system of passive detectors of radon. The results of the new automatic exchanger system when it leave to flow the radon freely among the container and the automatic exchanger through a plastic membrane of 15 m. are shown. (Author)

  2. "!Luces, Camara, Accion!": A Classroom Teacher Research Analysis of Dual Language Students Translanguaging through One-Act Plays

    Science.gov (United States)

    Escalante, Lora Beth

    2012-01-01

    The study investigates how language is used among 17 children in a dual language classroom as they create academic-based one-act plays in conjunction with social studies instruction. Examining over 20 hours of video, the teacher researcher analyzes students' use of translanguaging during cooperative groupings in order to co-accomplish an…

  3. Scattering study at free air ionization chamber diaphragm; Estudo do espalhamento no diafragma da camara de ionizacao de ar livre

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Alexandre Lo Bianco dos

    2011-07-01

    The maim of this work consisted in the assessment of the correction factor for air kerma, due to scattered radiation in the diaphragm of the free-air ionization chamber model 481. LNMRl measurements were made to acquire x-ray spectra corresponding to the Qualities RQR-M, described in IEC 61627 standards (2005). These spectra were used as input data in the MC simulations. The operational range of energy spectra provide up to 35 keV. This energy range is typically used in diagnostic radiology, although there is not primary standard for air kerma. The determination of this factor is a fundamental process in the primary standardization of the air kerma. These factors were obtained by computer simulation using the Penelope code. The results are k{sub RQR-M1}=0,9946, k{sub RQR} {sub -M2}=0,9932, k{sub RQR-M3}=0,9978 and k{sub RQR-M4}=0,9885; with uncertainties of 0,007 and coverage factor equal to 2. lt can be concluded that, with respect to the diaphragm, the chamber can be used in the primary standard of air kerma. (author)

  4. Indirect heating of natural gas using vapor chambers; Aquecimento indireto de gas natural com uso de camaras de vapor

    Energy Technology Data Exchange (ETDEWEB)

    Milanez, Fernando H.; Mantellil, Marcia H.B.; Borges, Thomaz P.F. [Santa Catarina Univ., Florianopolis, SC (Brazil). Dept. de Engenharia Mecanica; Landa, Henrique G. de [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas

    2005-07-01

    Operation safety and reliability are major guidelines in the design of city-gate units. Conventional natural gas heaters operate by a indirect mechanism, where liquid water is used to transfer heat by natural convection between the combustion chamber and the natural gas coil. In this work, the concept of vapor chamber is evaluated as an indirect gas heater. In a vapor chamber, liquid water is in contact with the heat source, and vaporizes. The vapor condenses in contact with the heat sink. A reduced scale model was built and tested in order to compare these two heating concepts where the combustion chamber was replaced by electrical cartridge heaters. This engineering model can operate either as a conventional heater or as a vapor chamber. The comparison between the concepts was done by inducing a controlled power to the cartridges and by measuring the resulting temperature distributions. In the novel design, the heat exchanger efficiency increases, and the thermal inertia decreases, compared to the conventional system. The new sealed concept of the chamber prevents water evaporation losses. (author)

  5. Occupational doses due to photoneutrons in medical linear accelerators rooms; Doses ocupacionais devido a neutrons em salas de aceleradores lineares de uso medico

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Alessandro Facure Neves de Salles

    2006-04-15

    Medical linear accelerators, with maximum photon energies above 10 MeV, are becoming of common use in Brazil. Although desirable in the therapeutic point of view, the increase in photon energies causes the generation of undesired neutrons, which are produced through nuclear reactions between photons and the high Z target nuclei of the materials that constitute the accelerator head. In this work, MCNP simulation was undertaken to examine the neutron equivalent doses around the accelerators head and at the entrance of medical linear accelerators treatment rooms, some of them licensed in Brazil by the National Regulatory Agency (CNEN). The simulated neutron dose equivalents varied between 2 e 26 {mu} Sv/Gy{sub RX}, and the results were compared with calculations performed with the use of some semi-empirical equations found in literature. It was found that the semi-empirical equations underestimate the simulated neutron doses in the majority of the cases, if compared to the simulated values, suggesting that these equations must be revised, due to the increasing number of high energy machines in the country. (author)

  6. Absorbed dose due to radioiodine therapy by organs of patients with hyperthyroidism; Dose absorvida em orgaos de pacientes com hipertiroidismo devido a radioiodoterapia

    Energy Technology Data Exchange (ETDEWEB)

    Lima, F.F.; Khoury, H.J.; Bertelli Neto, L. [Pernambuco Univ., Recife, PE (Brazil); Laboratorios CERPE, Recife, PE (Brazil); Bertelli Neto, L. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil)

    1999-07-01

    The dose absorbed by organs of patients with hyperthyroidism treated with {sup 131} I was estimated by using the MIRDOSE computer program and data from ICRP-53. The calculation were performed using effective half-life and uptake average values, which were determined for 17 patients treated with 370 MBq and 555MBq of {sup 131} I. The results shown that the dose in the thyroid, for a 370 MBq administrated activity, was of 99 Gy and 49.5 Gy for 60 g and 80 g thyroid respectively. The average dose estimated in other organs were relatively low, presenting values lower than 0.1 Gy in the kidneys, bone marrow and ovaries and 0.19 Gy in the stomach.

  7. Environmental pollutants and stroke-related hospital admissions Poluentes ambientais e internações devido a acidente vasculoencéfalico

    Directory of Open Access Journals (Sweden)

    Luiz Fernando Costa Nascimento

    2012-07-01

    Full Text Available Some effects of environmental pollution on human health are known, especially those affecting the respiratory and cardiovascular systems. The current study aimed to estimate these effects on the production of hospital admissions for stroke. This was an ecological study using hospital admissions data in São José dos Campos, São Paulo State, Brazil, with diagnosis of stroke, from January 1, 2007, to April 30, 2008. The target pollutants were particulate matter, sulfur dioxide, and ozone. Use of a Poisson linear regression model showed that same-day exposure to particulate matter was associated with hospitalization for stroke (RR = 1.013; 95%CI: 1.001-1.025. An increase of 10µg/m³ in this pollutant increased the risk of hospitalization by 12% (RR = 1.137; 95%CI: 1.014-1.276. In the multi-pollutant model, it was thus possible to identify particulate matter as associated with hospitalization for stroke in a medium-sized city like São José dos Campos.Alguns dos efeitos da poluição ambiental na saúde humana são conhecidos, destacando aqueles nos sistemas respiratório e cardiovascular. Este trabalho tem por objetivo estimar esses efeitos na gênese das internações por acidente vasculoencefálico. Foi um estudo ecológico realizado com dados de internações da cidade de São José dos Campos, São Paulo, Brasil, relativos aos diagnósticos de acidente vascular cerebral, entre 1º de janeiro de 2007 e 30 de abril de 2008. Os poluentes estudados foram material particulado, dióxido de enxofre e ozônio. Utilizando-se de modelo linear generalizado da regressão de Poisson, foi possível identificar exposição ao material particulado, no mesmo dia, como associado à internação por acidente vasculoencefálico (RR = 1,013; IC95%: 1,001-1,025. O aumento de 10µg/m3 desse poluente aumenta o risco de internação em 12% (RR = 1,137; IC95%: 1,014-1,276. Assim, foi possível identificar o material particulado, no modelo multipoluente, como associado à internação por acidente vasculoencefálico numa cidade de porte médio, como São José dos Campos.

  8. Trilhamento elétrico sobre materiais poliméricos pela análise da energia absorvida devido as descargas elétricas superficiais

    OpenAIRE

    Silva, Ricardo Fernandes da

    2014-01-01

    Resumo: O presente trabalho tem como ponto de partida um aprofundamento no estudo do fenômeno de trilhamento elétrico em materiais poliméricos. A falha do isolamento por trilhamento elétrico causa vários problemas de suportabilidade em componentes utilizados em sistemas de geração, transmissão e distribuição de energia elétrica, pois este é um fenômeno importante na degradação dos materiais utilizados como isolantes e seu entendimento não está totalmente compreendido. Para se obter o entendim...

  9. Impact evaluation of distributed generation on distribution networks due to reclosing operations; Avaliacao do impacto de geracao distribuida em sistemas de distribuicao devido a operacoes de religamento

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Carlos Frederico Meschini; Kagan, Nelson [Universidade de Sao Paulo (ENERQ/USP), SP (Brazil). Centro de Estudos em Regulacao e Qualidade de Energia], Emails: cfmalmeida@usp.br, nelsonk@pea.usp.br; Arefifar, Seyed Ali; Xu, Wilsun [University of Alberta (Canada)], Emails: aefifar@ualberta.ca, wxu@ualberta.ca

    2010-10-15

    This paper investigates the impact of Distributed Generators (DG) re-closing inrush current on the power distribution system. The current is compared with the fault current of the supply system to determine if an asynchronous reclosing of DG will affect the power distribution system. For this purpose, a model of a power distribution feeder has been developed using PSCAD/EMTP and several simulations were carried out varying the size of the DG. Finally an analytical formula is developed to determine the maximum DG size that can be connected to the system without leading to excessive synchronization current for the utility. (author)

  10. Molde brônquico devido ao uso de interferon peguilado e ribavirina Bronchial casts attributed to the use of pegylated interferon and ribavirin

    Directory of Open Access Journals (Sweden)

    Eduardo Garcia

    2009-07-01

    Full Text Available Relatamos o caso de um homem de 50 anos com uma rara associação entre moldes brônquicos e o uso de interferon peguilado e ribavirina. O paciente procurou o serviço de pneumologia por apresentar, há quatro meses, dispneia progressiva que evoluiu com tosse progressiva seguida da expulsão de moldes brônquicos frequentes e abundantes. O paciente foi tratado inicialmente com medicações broncodilatadoras e uso de corticoide oral e inalatório. Foram realizados fibrobroncoscopia, lavado broncoalveolar e análise do escarro, os quais não acrescentaram informações para elucidação diagnóstica. Durante o período sintomático, o paciente fez uso de interferon peguilado e ribavirina para o tratamento de hepatite C. Após 30 dias da interrupção das medicações, o paciente ficou assintomático. Este é o primeiro relato sobre a associação entre molde brônquico e o uso de interferon peguilado e ribavirina.We report the case of a 50-year-old male patient with a rare profile: bronchial casts associated with the use of pegylated interferon and ribavirin. The patient sought treatment in a pulmonology clinic with a history of progressive dyspnea for four months that had evolved to progressive cough followed by frequent and abundant elimination of bronchial casts. The patient was initially treated with bronchodilators, as well as with oral and inhaled corticosteroids. Fiberoptic bronchoscopy, bronchoalveolar lavage and sputum analysis were carried out but did not contribute to the elucidation of the diagnosis. The symptoms developed while the patient was receiving pegylated interferon and ribavirin for the treatment of hepatitis C. The symptoms resolved 30 days after the discontinuation of the treatment. To our knowledge, this is the first report of bronchial casts caused by the use of pegylated interferon and ribavirin.

  11. Hemorragia intracraniana espontânea em pediatria: relato de paciente hemofílico que sobreviveu devido a cisto cerebral

    Directory of Open Access Journals (Sweden)

    José Colleti Junior

    2015-12-01

    Full Text Available RESUMO Relatamos o caso de um uma criança de 2 anos de idade que sobreviveu após um episódio agudo de hemorragia intracraniana espontânea grave com sinais clínicos e radiológicos de hipertensão intracraniana e herniação transtentorial. O paciente foi para cirurgia de urgência para drenagem do hematoma, sendo inserido um cateter para monitorar a pressão intracraniana. Na análise da tomografia de crânio inicial, antes da drenagem do hematoma, constatou-se um cisto cerebral contralateral ao hematoma que, segundo análise do neurocirurgião e do neuroradiologista, possivelmente evitou um desfecho pior, visto que o cisto serviu de acomodação para o cérebro após a hemorragia maciça. Após investigação, constatou-se tratar de um caso de hemofilia tipo A sem diagnóstico prévio. O paciente foi tratado em terapia intensiva com controle da pressão intracraniana, reposição de fator VIII e obteve alta sem sequelas neurológicas evidentes.

  12. Histopathological study of the effects of low-intensity laser irradiation ({lambda}=650 nm) on dental pulp tissue after cavity preparation; Estudo histopatologico dos efeitos da irradiacao laser em baixa intensidade ({lambda}=650nm) em tecido pulpar apos preparo cavitario

    Energy Technology Data Exchange (ETDEWEB)

    Bertella, Claudio

    2001-07-01

    The purpose of this study was to evaluate (in vivo) the effects of low-intensity Arsenide Gallium Aluminium laser application post-cavity preparation class 1. Six patients with bilateral pre-molars and molars indicated to extraction for orthodontics aim were selected. Four samples of these teeth underwent cavity preparation with deep from medium to high and two samples underwent cavity preparation from high to pulp expositions. The samples were constituted of two teeth of the same patient and received different treatments. One of the teeth underwent laser exposition and the other one was maintained as control, before restorative procedure with polycarboxylate cement. A diode laser ({lambda}=650 nm), output power 30 mW and fluencies of 1,8 J/cm{sup 2} and 2,7 J/cm{sup 2} in pre-molars and molars, respectively, was used for irradiation with repetition rate of 18 Hz in interrupted continuous wave mode. After seven days, the teeth were extracted and processed histologically with HE to verify morphological changes in the pulpy tissue. The four samples, which cavity preparation and restorative material were not in contact with the pulp, did not show histological differences between irradiated and non-irradiated teeth. Both of them presented the same characteristics of normality. The two samples with exposed pulpy tissue showed different results. The irradiated teeth presented no or slight inflammatory signs when compared to the control samples, which showed abscess in the coronary pulp interior and intense inflammatory infiltrated. These results suggest that the laser irradiation can be used as a therapeutic modality in clinical trials, in the conditions employed in this study. (author)

  13. The effect of timing temporary cements to treat induced pulp necrosis in the teeth of dogs Uso do "curativo de demora" em diferentes tempos no tratamento endodôntico de cães com necrose pulpar induzida

    Directory of Open Access Journals (Sweden)

    Léslie M. Domingues-Falqueiro

    2007-02-01

    Full Text Available During endodontic therapy (pulpectomy, root canal debridement and root canal filling microbiological management is a major concern. Bacteria present in dentine tubules, apical foramina and apical delta are causally related to failure of the procedure. Studies have shown that during single session endodontic treatment bacteria remain within dental structures. The aim of the present study was to evaluate endodontic treatment performed as two sessions, using temporary endodontic dressing materials for different periods in four groups of experimental dogs. A total of 80 roots of second and third upper premolar teeth and second, third and fourth lower premolar teeth were divided into four groups. The pulp chamber was opened with burrs and the pulp exposed for 60 days to induce pulpal inflammation and necrosis. Groups II, III and IV were treated with calcium hydroxide plus camphorated paramono-chlorophenol (PMCC for 7, 15 and 30 days, respectively. In all groups, the root canals were filled with zinc oxide-eugenol and gutta-percha cones. Clinical and radiographical measurements were performed every 2 weeks. After 60 days a small block section containing the teeth, surrounding periapical tissues and the periodontium was removed for histological and microbiological study. Histological analysis revealed intense inflammatory response in all groups. Microbiological analysis showed microbial reduction inversely proportional to the period of time that the intracanal temporary medicament was left in place.Em um tratamento endodôntico, a microbiota é o ponto primordial a ser levado em consideração, pois as bactérias presentes nos túbulos dentinários, nas foraminas e no delta apical em cães estão relacionadas aos insucessos do procedimento. Estudos revelam que tratamentos realizados em uma única sessão ainda permitem a permanência de bactérias nas estruturas dentárias, portanto propõe-se a execução em duas sessões, com diferentes tempos de "curativo de demora", para verificação da eficácia do protocolo em cães. Foram utilizados no total quatro cães, num total de 80 raízes, provenientes dos 2os e 3os pré-molares superiores e 2os, 3os e 4os pré-molares inferiores, divididas em quatro grupos de estudo. Nestes foi realizada abertura coronária, onde a polpa ficou exposta por 60 dias. Os Grupos II, III e IV foram tratados. O hidróxido de cálcio com p-monoclorofenol canforado, isto é, a pasta Calen/PMCC (S.S. White Artigos Dentários Ltda, RJ, foi utilizada como "curativo de demora". O Grupo II permaneceu com "curativo de demora" por sete dias, o Grupo III permaneceu por 15 dias e o Grupo IV por 30 dias, todos os grupos foram obturados com cimento à base de óxido de zinco e eugenol - Herodent (Vigodent S.A. Indústria e Comércio, SP e guta-percha. Todos os grupos tiveram controle clínico e radiográfico quinzenal e após 60 dias os dentes foram extraídos em bloco (dente e periodonto e passaram por processamento laboratorial para realização das análises histopatológica e histomicrobiológica. A análise histopatológica de forma geral mostrou intensa reação inflamatória em todos os grupos estudados, já na análise histomicrobiológica pode-se observar uma diminuição no número de microrganismos proporcional ao tempo de "curativo de demora" deixado intra-canal, portanto a permanência do "curativo" por 30 dias foi a mais eficaz.

  14. Effects of holmium laser on dental structure in vivo: thermal evaluation and histological analysis on pulpal tissue; Efeitos in vivo do laser de holmio em estrutura dental: monitoracao termica e analise histologica do tecido pulpar

    Energy Technology Data Exchange (ETDEWEB)

    Strefezza, Claudia

    2001-07-01

    Previous in vitro studies have demonstrated that Ho:YLF laser is capable of inducing physical and chemical changes on dental surfaces treated for caries prevention. The temperature in the pulp chamber was in vitro evaluated to as a function of the power and frequency of the laser irradiation. The purpose of this work is to verify the occurrence of pulp inflammation after Ho:YLF laser irradiation using different parameters in rabbits' teeth. The premolars and molars of ten rabbits (NZB) were divided in two groups according to the irradiation energy values of a Ho:YLF laser prototype operating at 2.065{mu}m wave length, frequency of O,5Hz and pulse length of 250{mu}s. An group A teeth were irradiated with using ten pulses of 334mJ/pulse of a Ho:YLF laser prototype operating at O.5Hz, and group B, with 512mJ/pulse. Animals were killed by transcardiac perfusion and the samples were prepared for histopathological analysis. The in vitro temperature monitoring revealed an increase of 1 deg C for the 334mJ/pulse energy and 4.5 deg C for the 512mJ/pulse energy. SEM observations showed the occurrence of melting and resolidification in dental surface. From the in vivo analysis it can be concluded that both employed laser parameters did not induce to any inflammatory response from the pulp. (author)

  15. Design of a chamber for deposit of thin films by laser ablation; Diseno de una camara para el deposito de peliculas delgadas por ablacion laser

    Energy Technology Data Exchange (ETDEWEB)

    Chirino O, S

    2001-07-01

    The present work has as purpose to design a vacuum chamber, to the one that is denominated chamber of ablation, in which were carried out deposits of thin films using the well-known technique as laser ablation. To fulfill the purpose, the work has been distributed in the following way: in the chapter 1 there are discussed the generalities of the technique of ablation laser for the obtaining of materials in form of thin film, in the chapter 2 the basic concepts of the vacuum technology are mentioned that includes among other things, systems to produce vacuum and vacuum gages and in the chapter 3 the design of the chamber is presented with the accessories and specific systems. (Author)

  16. Mechanical behavior of PMMA due to artificial aging by means of a xenon-test chamber; Comportamiento mecanico del polimetilmetacrilato sometido a envejecimiento artificial mediante camara xenotest

    Energy Technology Data Exchange (ETDEWEB)

    Colom, X.; Nogues, F.; Valldeperas, J.; Carrillo, F.; Gordillo, A.

    2001-07-01

    In this investigation, the mechanical behavior of poly(methylmethacrylate) due to aging in Xenon test chamber, using a xenon-arch lamp as alight radiation to simulate natural sun light has been studied. This work studies the mechanical properties (elongation at break, Young's modules, tensile strength and toughness) of PMMA samples exposed to different aging conditions (until 1560 h xenotest that correspond to 750 days exposure at natural light). The evolution of different mechanical properties characterizes the PMMA's process of degradation. (Author) 10 refs.

  17. Proofs of acceptance of ionization cameras for use in radiotherapy; Pruebas de aceptacion de camaras de ionizacion de uso en radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Davila, Hernan Olaya; Flores, Guillermo, E-mail: holayadavila@gmail.com [Instituto Colombiano de Geologia y Mineria (INGEOMINAS), Bogota, D.C. (Colombia). Laboratorio de Metrologia de las Radiaciones del Servicio Geologico Colombiano; Cantillo, Juliana I.P., E-mail: julianacantillo5@gmail.com [Universidad Pedagogica y Tecnologica de Colombia, Boyaca (Colombia)

    2013-07-01

    Shows the main technical tests released in the Secondary Standard Dosimetry Laboratory (SSDL) of one cylindrical ionization chamber and another plane parallel ionization chamber similar to used in radiotherapy services in Colombia to the radiation dose control that is delivered to the patient to the cancer treatment. The previous test of one calibration see in this work are: correction for recombination losses, polarity dependence, stabilization time, total dose dependence, atmospheric communication, stability check, leakage current and physical integrity. Calculates the acceptability values in the SSDL to be account as reference for the dosimetry systems that are carry in calibration process. (author)

  18. Characterization of a extrapolation chamber in standard X-ray beam, radiodiagnosis level; Caracterizacao de uma camara de extrapolacao em feixes padroes de raios X, nivel radiodiagnostico

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Eric A.B. da; Caldas, Linda V.E., E-mail: ebrito@usp.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-10-26

    The extrapolation chamber is a ionization chamber used for detection low energy radiation and can be used as an standard instrument for beta radiation beams. This type of ionization chamber have as main characteristic the variation of sensible volume. This paper performs a study of characterization of a PTW commercial extrapolation chamber, in the energy interval of the qualities of conventional radiodiagnostic

  19. Study on a drift chamber for high energy experiments; Estudos sobre uma camara de arrasto para um experimento de altas energias

    Energy Technology Data Exchange (ETDEWEB)

    Puget, Maria Augusta Constante

    1993-12-31

    This work deals with the studies of a multiwire gaseous detector operating as a drift chamber, which will be part of the SELEX spectrometer of the experiment Fermilab E781. A prototype was designed to be built and tested at IFUSP. Results are shown of the analysis of data taken with another similar detector whose construction and test were done at Fermilab, with the aim of studying its characterization and performance. (author) 35 refs., 54 figs., 17 tabs.

  20. Interface for the Construction of the CMS Detector (IC''3MS); Interfaz para la Construccion de Camaras CMS (IC''3MS)

    Energy Technology Data Exchange (ETDEWEB)

    Ballador Ferreras, A.; Gonzalez Giralda, C. [Ciemat. Madrid (Spain)

    2001-07-01

    This Technical Report shows a computer System named: Interface for the Control of CMS Detector (IC''3MS), whose main objective is to provide a design and advice tool which can be used for the assembly of super layers for the Compacts Muon Solenoid. This computer application is divided up into three independent modules that maintain a proper connection between them. These modules correspond to the three principal actors that control the assembly we said before. These actors are the analysts, that determine the control routines, the engineers, that specify the control details and finally the workers who use the control routines. This application has been developed as a collaboration between the Experimental Physic of Particles; which belongs to the Fusion and Elementary particles department and the Special Project Group, belonging to the Information Technologies Department, both them from the CIEMAT (Author)

  1. Hydra phantom applicability for carrying out tests of field uniformity in gamma cameras; Aplicabilidade do fantoma hydra para realizacao dos testes de uniformidade de campo em gama camaras

    Energy Technology Data Exchange (ETDEWEB)

    Aragao Filho, Geraldo L., E-mail: geraldo_lemos10@hotmail.com [Centro de Medicina Nuclear de Pernambuco (CEMUPE), Recife, PE (Brazil); Oliveira, Alex C.H., E-mail: oliveira_ach@yahoo.com [Universidade Federal de Pernambuco (DEN/UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Lopes Filho, Ferdinand J.; Vieira, Jose W., E-mail: ferdinand.lopes@oi.com.br, E-mail: jose-wilson59@live.com [Instituto Federal de Pernambuco (IFPE), Recife, PE (Brazil)

    2014-07-01

    Nuclear Medicine is a medical modality that makes use of radioactive material 'in vivo' in humans, making them a temporary radioactive source. The radiation emitted by the patient's body is detected by a specific equipment, called a gamma camera, creates an image showing the spatial and temporal biodistribution of radioactive material administered to the patient. Therefore, it's of fundamental importance a number of specific measures to make sure that procedure be satisfactory, called quality control. To Nuclear Medicine, quality control of gamma camera has the purpose of ensuring accurate scintillographic imaging, truthful and reliable for the diagnosis, guaranteeing visibility and clarity of details of structures, and also to determine the frequency and the need for preventive maintenance of equipment. To ensure the quality control of the gamma camera it's necessary to use some simulators, called phantom, used in Nuclear Medicine to evaluate system performance, system calibration and simulation of injuries. The goal of this study was to validate a new simulator for nuclear medicine, the Hydra phantom. The phantom was initially built for construction of calibration curves used in radiotherapy planning and quality control in CT. It has similar characteristics to specific phantoms in nuclear medicine, containing inserts and water area. Those inserts are regionally sourced materials, many of them are already used in the literature and based on information about density and interaction of radiation with matter. To verify its efficiency in quality control in Nuclear Medicine, was performed a test for uniformity field, one of the main tests performed daily, so we can verify the ability of the gamma camera to reproduce a uniform distribution of the administered activity in the phantom, been analysed qualitatively, through the image, and quantitatively, through values established for Central Field Of View (CFOV) and Useful Field Of View (UFOV). Also, was evaluated their ability to simulate different tissues of human body parts, without being in contact with radioactive material, called low uptake 'hipocaptantes' areas using the inserts. The Hydra phantom is valid for use in the test for uniformity field in nuclear medicine, that can be made available for purposes of study, research and test for quality control. In addition, it can be enhanced and used in other tests for quality control, and be a basis model for developing new models of physical phantoms. (author)

  2. Development of special ionization chambers for a quality control program in mammography; Desenvolvimento de camaras de ionizacao especiais para controle de qualidade em mamografia

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jonas Oliveira da

    2013-07-01

    Mammography is an imaging method that uses X-rays. The use of ionization chambers in mammography quality control programs presents an essential role which is to verify whether the parameters of the patient exposure are correct. However, the commercial ionization chambers for dosimetry in mammography represent a high cost for small and medium size clinics that wish to have this equipment or for professionals that work with quality control programs. The innovative feature of this work was to develop ionization chambers for this purpose. In this work ionization chambers for X radiation beams in the mammography energy range were designed, constructed and characterized. The ionization chambers were tested in standard X radiation beams at the LCI/IPEN. The main characterization tests performed with the ionization chambers were: saturation curve, linearity of response, angular and energy dependence. The response stability tests of the ionization chambers were also conducted at the LCI, presenting results within 2.0 % for long-term stability. The results of the remaining tests are in accordance with international standards. These ionization chambers were also submitted to quality control tests of mammography equipment: linearity of the air kerma rates, determination of half-value layers and mean glandular doses. The results for air kerma rate linearity were less than 10 %, as recommended in international standards. The mean glandular dose obtained with the developed chambers presented values comparable to those of commercial ionization chambers tested, with an estimated variation within international standards. (author)

  3. Comparison of the half-value layer: ionization chambers vs solid-state meters; Comparacao entre medidas de camada semirredutora: camara de ionizacao vs medidores de estado solido

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, L.C.S.; Navarro, V.C.C.; Navarro, M.V.T.; Macedo, E.M., E-mail: larapereira@ifba.edu.br [Instituto Federal da Bahia (LABPROSAUD/IFBA), Salvador, BA (Brazil). Laboratorio de Produtos para a Saude

    2015-07-01

    Generally, the half value layer (HVL) is determined by using ionization chambers and aluminum filters. However, some solid-state dosimeters allow simultaneous measurements of X-ray's parameters, among which the HVL. The main objective of this study was to compare the HVL's values indicated by four different solid-state dosimeters, whose values were measured by ionization chambers. The maximum difference found between the two methods was 11.42%, one the solid-state dosimeters, showing that the use these instruments to determine CSR in industrial X-ray should be subject to a more thorough evaluation. (author)

  4. Simulation of the functioning of a gamma camera using Monte Carlo method; Simulacion del funcionamiento de una camara gamma mediante metodo Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Oramas Polo, I.

    2014-07-01

    This paper presents the simulation of the gamma camera Park Isocam II by Monte Carlo code SIMIND. This simulation allows detailed assessment of the functioning of the gamma camera. The parameters evaluated by means of the simulation are: the intrinsic uniformity with different window amplitudes, the system uniformity, the extrinsic spatial resolution, the maximum rate of counts, the intrinsic sensitivity, the system sensitivity, the energy resolution and the pixel size. The results of the simulation are compared and evaluated against the specifications of the manufacturer of the gamma camera and taking into account the National Protocol for Quality Control of Nuclear Medicine Instruments of the Cuban Medical Equipment Control Center. The simulation reported here demonstrates the validity of the SIMIND Monte Carlo code to evaluate the performance of the gamma camera Park Isocam II and as result a computational model of the camera has been obtained. (Author)

  5. Evaluation of a special pencil ionization chamber by the Monte Carlo method; Avaliacao de uma camara de ionizacao tipo lapis especial pelo metodo de Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Mendonca, Dalila; Neves, Lucio P.; Perini, Ana P., E-mail: anapaula.perini@ufu.br [Universidade Federal de Uberlandia (INFIS/UFU), Uberlandia, MG (Brazil). Instituto de Fisica; Santos, William S.; Caldas, Linda V.E. [Instituto de Pesquisas Energeticas e Nucleres (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    A special pencil type ionization chamber, developed at the Instituto de Pesquisas Energeticas e Nucleares, was characterized by means of Monte Carlo simulation to determine the influence of its components on its response. The main differences between this ionization chamber and commercial ionization chambers are related to its configuration and constituent materials. The simulations were made employing the MCNP-4C Monte Carlo code. The highest influence was obtained for the body of PMMA: 7.0%. (author)

  6. The uncertainty associated to the position of the ionization chamber; La incertidumbre asociada en el posicionamiento de la camara de ionizacion

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, F., E-mail: flopez@unan.edu.ni [Universidad Nacional Autonoma de Nicaragua, Managua (Nicaragua); Cabral, T.S.; Peixoto, J.G. [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2013-07-01

    This work is about the determination of the components of uncertainties originated for the positioning of 600cm{sup 3} camera in a field of radiation for a {sup 137}Cs source for a Dosimetry Laboratories. The basic idea is the inverse square of the distance law and its influence on the kerma in air. It was demonstrated that the effect over the uncertainty is negligible, for a 30 cm{sup 3} camera the result will be different. (author)

  7. Study of the Dependence of the Source check ionization chamber with pressure; Estudio de la dependencia de la camara de ionizacion Sourcecheck con la presion

    Energy Technology Data Exchange (ETDEWEB)

    Tornero-Lopez, A. M.; Ruiz-Arrabola, S.; Moreno-Torres, M.; Simancas, F.; Guerrero, R.; Guirado, D.

    2013-07-01

    Because of the importance of accurate measurement of power low-energy photons, such as I-125 seeds used in brachytherapy, and the widespread use of Source Check in Europe, this work is to study whether this camera features any dependence the pressure and shows included in the pressure-temperature factor usual. (Author)

  8. Importance of critical evaluation in quality control of scintillation cameras;Importancia da avaliacao criteriosa no controle de qualidade de camaras de cintilacao

    Energy Technology Data Exchange (ETDEWEB)

    Menezes, V.O.; Machado, M.A.D.; Sampaio, L.J.L.; Silva, D.C. [Hospital Sao Rafael, Salvador, BR (Brazil)

    2009-07-01

    The evaluation of quality control results in nuclear medicine must be performed with a critical view over the conditions the tests are executed. This paper is a result of observations in the routine quality control where we set up didactic 'findings' to show the importance of evaluating critical situations while executing the procedures. (author)

  9. Selection of a conventional power distribution transformer as a voltage source for saline chambers; Seleccion de un transformador de distribucion convencional como fuente de voltaje en camaras salinas

    Energy Technology Data Exchange (ETDEWEB)

    Garza Macias, Anibal [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1988-12-31

    In the Mexico`s Gulf Coast and in the North East part of the country there are severe pollution problems on the electric distribution power systems insulators. To solve this problem, in specialized laboratories are reproduced the pollution conditions for their quantitative and qualitative analyses. In general terms, for this purpose special voltage transformers have been used that, for being imported, are very expensive; furthermore there is no defined selection criterion that allows the voltage source to supply the current recommended by the IEC (International Electrotechnical Commission). In this article, a proposal is presented to select a transformer that fulfills the IEC requirements. This equipment, because of its acquisition easiness and economy, permits that any teaching or research institution have a voltage source that allows the experimentation of the pollution phenomena at a minimum cost. [Espanol] En la costa del Golfo de Mexico y en el noroeste del pais hay severos problemas de contaminacion en los aisladores de los sistemas electricos de distribucion. Para solucionar este problema, se reproducen, en laboratorios especializados, las condiciones de contaminacion para su analisis cualitativo y cuantitativo. En general, con este proposito se han utilizado transformadores especiales de voltaje que por ser de importacion son muy costosos; ademas, no existe un criterio definido de seleccion que permita suministrar a la fuente de voltaje la corriente recomendada por el IEC (International Electrotechnical Commission). En este articulo se presenta una propuesta para seleccionar un transformador que cumpla con los requerimientos del IEC. Esta, por su facilidad de adquisicion y economia, permite que cualquier institucion docente o de investigacion cuente con una fuente de voltaje que permita la experimentacion de los fenomenos contaminantes con un costo minimo.

  10. Calibration methods of plane-parallel ionization chambers used in electron dosimetry; Metodos de calibracao de camaras de ionizacao de placas paralelas para dosimetria de feixes de eletrons

    Energy Technology Data Exchange (ETDEWEB)

    Bulla, Roseli Tadeu

    1999-07-01

    The use of linear accelerators in radiotherapy is of great importance in Medicine, and according to international recommendations the electron beam dosimetry has to be performed using plane-parallel ionization chambers, previously calibrated in standard gamma radiation fields at accredited laboratories. In this work, calibration methods of plane-parallel ionization chambers used in dosimetry procedures of high energy electron beams of clinical accelerators were presented, tested and intercompared. The experiments were carried out using gamma radiation beams of {sup 60} Co at the Calibration Laboratory of Clinical Dosemeters at IPEN and electron beams od 4 to 16 MeV at the Radiotherapy Department of Hospital Israelita Albert Einstein, Sao Paulo. A method was chosen to be established at IPEN. Proposals of the calibration procedure, calibration certificate and data sheets are presented. (author)

  11. Diseño de un molde de accesorios de fontanería utilizando el sistema SMED y camara caliente

    OpenAIRE

    Martín Sánchez, Sergio

    2011-01-01

    El objeto de este proyecto es el diseño de un molde para una gama de codos de fontanería. Para conseguir un diseño optimizado y respetuoso con el medio ambiente, se ha empleado los patrones marcados por el Ecodiseño y se ha instalado una cámara caliente. Para conseguir un cambio de pieza rápido y minimizar los tiempos de la producción, también se ha diseñado aplicando la teoría SMED. Teniendo en cuenta todos estos aspectos y sin dejar de lado los funcionales, se ha diseña...

  12. Design and implementation of a quality assurance program for gamma cameras; Diseno e implementacion de un programa de aseguramiento de calidad para camaras gamma

    Energy Technology Data Exchange (ETDEWEB)

    Montoya M, A.; Rodriguez L, A. [Instituto Nacional de Cancerologia, Departamento de Medicina Nuclear, Av. San Fernando No. 22, Col. Seccion XVI, 14080 Mexico D. F. (Mexico); Trujillo Z, F. E., E-mail: montoya-moreno@hotmail.co [Hospital Regional de Alta Especialidad de Oaxaca, Area de Fisica Medica, Aldama s/n, Paraje El Tule, 71256 San Bartolo Coyotepec, Oaxaca (Mexico)

    2010-09-15

    In nuclear medicine more than 90% of the carried out procedures are diagnostic. To assure an appropriate diagnostic quality of the images and the doses optimization received by the patients originated in the radioactive material, it is indispensable the periodic surveillance of the operation and performance of the equipment s by means of quality assurance tests. This work presents a proposal of a quality assurance program for gamma cameras based on recommendations of the IAEA, the American Association of Medical Physics and the National Electrical Manufacturers Association. Some tests of the program were applied to an e.cam gamma camera (Siemens) of the Nuclear Medicine Department of the National Institute of Cancer. The intrinsic and extrinsic uniformity, the intrinsic spatial resolution and the extrinsic sensibility were verified. For intrinsic uniformity the average daily values of the integral uniformity and differential uniformity in the useful vision field were 2.61% and 1.58% respectively, the average monthly values of intrinsic uniformity for the integral and differential uniformity in the useful vision field were 4.10% and 1.66% respectively. The used acceptance criterions were respectively of 3.74% and 2.74%. The average values of extrinsic uniformity for the useful vision field were of 7.65% (intrinsic uniformity) and 2.69% (extrinsic uniformity), in this case the acceptance criterion is a value of 6.00%. The average value of intrinsic spatial resolution went 4.67 mm superior to 4.4. mm that is the acceptance limit. Finally, maximum variations of 1.8% were observed (minors than 2% that is the acceptance criterion) for the extrinsic sensibility measured in different regions of the detector. Significant variations of extrinsic sensibility were not observed among the monthly lectures. Of the realized measurements was concluded that the system requires of a maintenance service by part of the manufacturer, which one carries out later on to this work. The implementation of a quality assurance program in nuclear medicine allows obtain diagnostic images of excellent quality, the doses optimization imparted to the patients, an exposition decrease to the occupationally exposed personnel, and in general it allows to improve the service productivity. This proposal can be used to develop similar quality assurance programs in other facilities also it can to act like an antecedent for the normative proposal for the quality assurance of equipment s in nuclear medicine. (Author)

  13. Preliminary study for elaborating a quality control program for scintillation chambers; Estudo preliminar para a elaboracao de um programa de controle de qualidade para camaras de cintilacao

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Rodrigo Alves; Ojeda, Renato Garcia [Santa Catarina Univ., Florianopolis, SC (Brazil). Escola de Engenharia Eletrica. Grupo de Pesquisas em Engenharia Biomedica

    1998-07-01

    This article presents a preliminary study, relative to quality control procedures to plane and tomographic (SECT) medical images, done by means of scintillation cameras. The study intends to consider and justify the most important aspects that should compose a quality control program program in the area. For so much, were considered international protocols that have been adopted all over the world, especially in developing countries, and the own Brazilian medical nuclear norm. (author)

  14. Maternal mortality due to arterial hypertension in São Paulo City (1995-1999 A mortalidade materna devido a hipertensão arterial na cidade de São Paulo (1995-1999

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Pereira Vega

    2007-01-01

    Full Text Available AIM: To describe the case profile of maternal death resulting from hypertensive disorders in pregnancy and to propose measures for its reduction. METHODS: The Committee on Maternal Mortality of São Paulo City has identified 609 cases of obstetric maternal death between 1995 and 1999 with an underreporting rate of 52.2% and a maternal mortality rate of 56.7/100,000 live births. Arterial hypertension was the main cause of maternal death, corresponding to 142 (23.3% cases. RESULTS: Ninety-five (66.9% of the deaths occurred during the puerperal period and 34 (23.9% occurred during pregnancy. The time of death was not reported in 13 (9.2% cases. Seizures were observed in 41 cases and magnesium sulfate was used in four of them. The causes of death were ruled to be cerebrovascular accident (44.4%, acute pulmonary edema (24.6%, and coagulopathies (14.1%. Cesarean section was performed in 85 (59.9% cases and vaginal delivery in 15 (16.0%. CONCLUSION: Complications of arterial hypertension are responsible for the high rates of pregnancy-related maternal death in São Paulo City. Quality prenatal care and appropriate monitoring of the hypertensive pregnant patient during and after delivery are important measures for better control of this condition and are essential to reduce disorders in pregnancy.OBJETIVO: Descrever o perfil dos casos de morte materna decorrente de complicações da hipertensão arterial e propor medidas para sua redução. MÉTODOS: De 1995 a 1999 o Comitê de Mortalidade Materna da Cidade de São Paulo identificou 609 casos de morte materna obstétrica, com uma subnotificação de 52,2% e um CMM=56,7/100.000 Nascidos Vivos. A hipertensão arterial foi a principal causa de óbito materno, correspondendo a 142 (23,3% casos. RESULTADOS: Ocorreram 95 (66,9% de óbitos no puerpério e 34 (23,9% durante a gestação. Em 13 (9,2% casos não se teve referência ao momento do óbito. Houve relato de crises convulsivas em 41 casos com a utilização de sulfato de magnésio em quatro deles. As principais causas determinantes do óbito foram: o acidente vascular cerebral (44,4%, o edema agudo de pulmão (24,6% e as coagulopatias (14,1%. A cesárea foi realizada em 85 (59,9% casos e o parto vaginal em 15 (16,0%. Em 28 (19,7% casos não foi realizada nenhuma conduta para interromper a gravidez e em 14 (9,8% não se obteve relato do procedimento. CONCLUSÃO: As complicações da hipertensão arterial no ciclo gravídico-puerperal determinam altos índices de mortalidade materna na cidade de São Paulo. A realização de um pré-natal de qualidade e o atendimento apropriado da gestante hipertensa no parto e no pós-parto são medidas de fundamental importância para um melhor controle desse evento, sendo primordial para a redução dessas ocorrências.

  15. Alterações hemodinâmicas devido ao uso de estabilizadores em revascularização do miocárdio: estudo experimental Hemodynamic disorders related to beating heart surgery using cardiac stabilizers: experimental study

    Directory of Open Access Journals (Sweden)

    Pedro Paulo Martins de Oliveira

    2007-12-01

    Full Text Available OBJETIVO: Estudar, em suínos, as alterações hemodinâmicas secundárias ao uso de estabilizadores para operações de revascularização do miocárdio sem circulação extracorpórea, um por sucção (Octopus e outro por compressão (Speroni. MÉTODOS: Dez suínos submetidos à esternotomia e monitorizados com eletrocardiograma, débito cardíaco contínuo e pressões: arterial média, pulmonar média, atriais médias direita e esquerda, ventriculares diastólicas direita e esquerda, calculando-se volume sistólico e resistência vascular sistêmica. Estudaram-se os estabilizadores posicionados em três artérias: interventricular anterior, interventricular posterior e ramo marginal da circunflexa. Para cada animal foi sorteada a ordem de aplicação do estabilizador com relação ao tipo e à artéria. As mensurações foram realizadas antes e após aplicar-se o estabilizador. RESULTADOS: Na artéria interventricular anterior, ocorreram alterações somente com o Speroni, havendo queda do débito cardíaco, do volume sistólico e da pressão arterial média, com aumento da resistência vascular sistêmica. Na artéria interventricular posterior, constatamos alterações com o Speroni, havendo queda do débito cardíaco e do volume sistólico, com aumento da freqüência cardíaca. Com o Octopus houve aumento da freqüência cardíaca e da resistência vascular sistêmica, com queda do volume sistólico. No ramo marginal da circunflexa, ocorreu queda do débito cardíaco, do volume sistólico e da pressão arterial média com os dois estabilizadores, havendo também queda na pressão arterial pulmonar média e aumento da pressão atrial direita média com o estabilizador por compressão. CONCLUSÕES: Ambos os estabilizadores causaram alterações hemodinâmicas. O que atua por compressão provocou mais alterações do que o que atua por sucção.OBJECTIVE: To study in swine the hemodynamic changes secondary to the use of stabilizers for off-pump coronary artery bypass graft surgeries by means of both a suction device "Octopus" and a compression device (Speroni. METHODS: Ten swine underwent median sternotomy. Monitoring of ECG, continuous cardiac output, mean arterial pressure, mean pulmonary artery pressure, mean right and left atrial pressures, and right and left ventricular diastolic pressure were performed. Stroke volume and systemic vascular resistance were calculated. Both stabilizers were studied placed on three vessels: anterior interventricular branch, posterior interventricular branch, and marginal branch of the circumflex branch. Each animal was randomly designed to application regarding the type of stabilizer and the target artery. The measurements were carried out 5 minutes before and after the stabilizer application. RESULTS: In the anterior interventricular branch changes have occurred only with the compression device, thus reducing cardiac output, stroke volume, and mean arterial pressure, but increasing the systemic vascular resistance. In the posterior interventricular branch changes have occurred with the compression device (Speroni, reducing cardiac output and stroke volume, but increasing the heart rate. With the suction device (octopus there was an increase of both heart rate and systemic vascular resistance, but a decrease in stroke volume. In the marginal branch of the circumflex branch there was a decrease of cardiac output, stroke volume, and mean arterial pressure with both stabilizers. Also, there was a decrease in the mean pulmonary artery pressure and an increase in the mean right atrial pressure with the compression device (Speroni. CONCLUSION: Both stabilizers have caused hemodynamic changes. The compression device (Speroni is more associated with changes than the suction device (Octopus.

  16. THE ACOUSTIC CONTAMINATION OF SCHOOL ENVIRONMENT DUE TO URBAN NOISES IN THE FEDERAL DISTRICT, BRASIL = A CONTAMINAÇÃO ACÚSTICA DE AMBIENTES ESCOLARES DEVIDO AOS RUÍDOS URBANOS NO DISTRITO FEDERAL, BRASIL

    OpenAIRE

    Alexandre Eniz; Sérgio Luiz Garavelli

    2006-01-01

    Urban noises are more and more presents in our daily life, invading residences, work places, leisure locations, hospitals and schools, becoming a potential harm to social interaction, communication, behavior, school performance, health etc. The main objective of this work was to analyze and quantify the environmental noise in ten schools of the basic education in District Federal, Brazil. The adopted parameter was the equivalent sound pressure level Leq (A), which was evaluated according to t...

  17. Marginal microleakage of class II composite resin restorations due to restorative techniques = Microinfiltração marginal de restaurações classe II de resina composta devido às técnicas restauradoras

    Directory of Open Access Journals (Sweden)

    Carvalho, Andreia A.

    2010-01-01

    Full Text Available Objetivo: Avaliar a microinfiltração marginal de restaurações classe II de resina composta (RC em função de técnicas restauradoras. Metodologia: Quarenta pré-molares humanos extraídos foram divididos em 4 grupos (n=10. Cavidades classe II foram preparadas (4 mm de largura, 2 mm de altura e margem gengival localizada a 1 mm além da junção amelo-cementária, e foi usado o sistema adesivo Prime & Bond 2. 1/TPH3 (Dentsply. A RC foi inserida pela técnica incremental oblíqua (OIT e polimerizada em exposição contínua. As técnicas restauradoras foram: grupo 1 (controle: OIT; grupo 2: resina fluida (1 mm aplicada na parede gengival + OIT; grupo 3: OIT + três esferas pré-polimerizadas no primeiro incremento de RC; e grupo 4: OIT + tira de fibra de vidro inserida no primeiro incremento de RC. Os espécimes foram submetidos à termociclagem por 500 ciclos (1 min a 5º-37º-55ºC, cobertos com duas camadas de esmalte até 1 mm das margens da restauração e imersos em solução de fucsina básica a 0,5% por 24 h. A extensão da penetração do corante na parede cervical (μm foi avaliada com microscópio ótico (x40. Os dados foram analisados por ANOVA (α=0,05. Resultados: Os valores de microinfiltração foram: G1: 370 μm ± 241; G2: 398 μm ± 354; G3: 205 μm ± 119 e G4: 413 μm ± 340. Não houve diferença estatisticamente significativa entre as técnicas restauradoras (P=0,081. Conclusão: Os valores de microinfiltração marginal não foram influenciados pelas diferentes técnicas restauradoras neste estudo

  18. False positive reaction due to endogenous biotin activity in glandular epithelium of decidua Reação falso positiva em epitélio glandular da decídua devido a atividade endógena de biotina

    Directory of Open Access Journals (Sweden)

    Liliana Cruz Spano

    2005-06-01

    Full Text Available Biotin-labeled probe was used in an in situ hybridisation assay to localize virus infection in formalin-fixed, paraffin embedded tissues taken from eleven abortion cases. Probes for human cytomegalovirus (HCMV, human Parvovirus B19 (B19 and human adenovirus type 2 (HAd2, were labeled with biotin-11-dUTP by nick-translation reaction. Streptavidin-alkaline-phosphatase (SAP was used to detect biotin, followed by 4-nitroblue tetrazolium/5-bromo-4-chloro-3-indolyl phosphate (NBT/BCIP solution. Positive reaction was observed in nucleus of glandular ephitelium cells of decidua either in positive or in negative control at first and second gestational trimester. The reaction was not inhibited with blocking solution for alkaline phosphatase endogenous activity and it persisted even with probes omission. The use of adequate negative control permitted to reveal the presence of nuclear biotin in glandular epithelium of decidua, responsible for false positivity in detection systems involving streptavidin biotin system (StrepABC. The stained cells resembled to cytophatic effect due to herpesvirus, which could induce further misinterpretation. The results obtained in this study strongly recommend that DNA detection by in situ hybridisation reaction in gestational endometrium should be done without using StrepABC system.Sondas marcadas com biotina foram utilizadas neste trabalho para detecção de infecção viral por hibridização in situ em tecidos fixados com formalina e embebidos em parafina de 11 casos obtidos de abortamento. Sondas para citomegalovírus humano (HCMV, parvovírus B19 humano (B19 e adenovírus humano tipo 2 (HAd2, foram marcadas com biotina-11-dUTP através da reação de nick-translation. Estreptavidina conjugada com fosfatase alcalina (SAP seguida por solução de 4-nitro-azul de tetrazolio/5-bromo-4-cloro-3-indolil fosfato (NBT/BCIP foram utilizadas para detecção da biotina após a reação de hibridização. Reação positiva foi observada no núcleo de células do epitélio glandular da decídua tanto no controle positivo quanto no negativo em tecidos de primeiro e segundo trimestre gestacional. Esta reação não foi inibida com solução bloqueadora da atividade endógena de fosfatase alcalina e persistiu mesmo com a omissão das sondas. O uso de controles negativos permitiu revelar atividade endógena de biotina nuclear em epitélio glandular da decídua, responsável por reações falso positivas em sistemas de detecção estreptavidina-biotina (StrepABC. Os resultados obtidos neste estudo fortemente recomendam que a detecção de ADN por hibridização in situ em endométrio gestacional seja feita com outro sistema de detecção que não o StrepABC.

  19. Caracterização, classificação e discriminação de doentes atendidos no serviço de urgência devido a Resultados Clínicos Negativos da Farmacoterapia

    OpenAIRE

    Cavaco, M.; Dias, L.S.; Fernández-Llimós, F.

    2013-01-01

    Resultados Clínicos Negativos da Farmacoterapia (RCNF) como motivo de atendimento em Serviços de Urgência foram investigados através de um questionário semi-fechado. As respostas foram analisadas por análise das correspondências e classificação hierárquica. Identificaram-se três grupos de doentes com RCNF, um essencialmente de sobrerrepresentação de necessidade de medicamentos, outro essencialmente com sobrerrepresentação de inefectividade de medicamentos, o terceiro com representação equitat...

  20. Aplastic crisis due to human parvovirus B19 infection in hereditary hemolytic anaemia Crise aplástica devido à infecção por parvovirus humano B19 em anemia hemolítica hereditária

    Directory of Open Access Journals (Sweden)

    R. C. N. Cubel

    1992-10-01

    Full Text Available Specific anti-B19 IgM was demonstrated in sera from three children showing transient aplastic crisis. A two years-old boy living in Rio de Janeiro suffering from sickle-cell anaemia showed the crisis during August, 1990. Two siblings living in Santa Maria, RS, developed aplastic crisis during May, 1991, when they were also diagnosed for hereditary spherocytosis. For a third child from this same family, who first developed aplastic crisis no IgM anti-B19 was detected in her sera.IgM específica anti-B19 foi demonstrada nos soros de três crianças apresentando aplasia transitória de medula. Um menino de dois anos de idade vivendo no Rio de Janeiro e sendo portador de anemia falciforme, apresentou a crise durante Agosto de 1990. Dois irmãos vivendo em Santa Maria - RS, desenvolveram crise de aplasia em Maio de 1991, quando foram também diagnosticados como portadores de microesferocitose. IgM anti-B19 não foi detectada no soro de uma terceira criança, desta mesma família, a qual primeiramente apresentou crise de aplasia.

  1. Traffic soil compaction of an oxisol related to soybean development and yield Compactação de um latossolo devido ao tráfego relacionado ao desenvolvimento e produtividade de soja

    Directory of Open Access Journals (Sweden)

    Amauri Nelson Beutler

    2007-12-01

    Full Text Available Excessive traffic on the soil may affect soybean development. This research was carried out to evaluate soybean root development and grain yield under compacted soil, in an Oxisol. The following traffic treatments were used: T0 = no traffic; T1* = 1 passage of a 4 t tractor; and, T1, T2, T4 and T6, respectively for 1, 2, 4 and 6 passages of an 11 t tractor on the same location, each besides the other. After compaction, soybean [Glycine max cv. MG/BR 46 (Conquista] was cultivated. The experiment was arranged in a completely randomized design, with six compaction levels and four replicates (plots of 9.0 m². Undisturbed soil samples were collected in the layers 0.03-0.06, 0.08-0.11, 0.15-0.18 and 0.22-0.25 m, for physical analyses. Root analyses were performed at layers of 0.0-0.10, 0.10-0.15 and 0.20-0.25 m. Soil compaction decreased deep root development and did not affect root amount, but its distribution. Yield decreased at the penetration resistance of 2.33 MPa or higher, and soil bulk density of 1.51 Mg m-3 or higher.O tráfego excessivo de máquinas sobre o solo pode prejudicar o desenvolvimento da cultura da soja. Assim, o objetivo deste estudo foi avaliar o desenvolvimento radicular e a produtividade da soja em função da compactação. O experimento foi realizado em Latossolo Vermelho de textura média. Os tratamentos de compactação foram: T0 = sem tráfego; T1* = 1 passada de trator de 4 t; e, T1, T2, T4 e T6, respectivamente, para 1, 2, 4 e 6 passadas de um trator de 11 t, no mesmo local, uma ao lado da outra. Após a compactação foi semeado o cultivar de soja (Glycine max MG/BR 46 (Conquista.O delineamento experimental foi inteiramente casualizado, com seis níveis de compactação e quatro repetições (parcelas de 9,0 m². Foram coletadas amostras indeformadas de solo nas camadas de 0,03-0,06; 0,08-0,11; 0,15-0,18 e 0,22-0,25 m, para determinação dos atributos físicos. As raízes foram avaliadas nas camadas de 0,0-0,10; 0,10-0,15 e 0,20-0,25 m. A compactação do solo diminuiu o desenvolvimento radicular em profundidade e não alterou a quantidade total de raízes, apenas sua distribuição. A produtividade de soja decresceu a partir da resistência do solo à penetração de 2,33 MPa e da densidade do solo de 1,51 Mg m-3.

  2. Development of methodologies for internal exposure assessment due to the radiopharmaceutical {sup 18}FDG; Desenvolvimento de metodologias para avaliacao da exposicao ocupational interna devido ao radiofarmaco {sup 18}FDG

    Energy Technology Data Exchange (ETDEWEB)

    Lacerda, Isabelle Viviane Batista de

    2013-07-01

    The production of {sup 18}F has increased in the last decade. It is produced basically for the synthesis of {sup 18}F- fluorodeoxyglucose ({sup 18}FDG), the main radiopharmaceutical used in PET (Positron Emission Tomography) scans. The growth in the frequency of these tests resulted in rise of the number of occupationally exposed individuals (OEI) to the radionuclide {sup 18}F as {sup 18}FDG, increasing thereby the probability of its accidental incorporation. This study aimed to implement optimized techniques for assessing internal exposures of individuals occupationally exposed through both in vivo and in vitro bioassay methods during production and handling of {sup 18}FDG at the Divisao de Producao de Radiofarmacos (DIPRA), Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN). The in vivo monitoring was conducted at the Laboratorio de Dosimetria Interna, Divisao de Laboratorios Tecnico-Cientificos (DILAB). For this bioassay method, measurements were done with a 3x3' NaI(Tl) scintillation detector coupled to Genie 2000 software. The calibration of the system was performed with a brain phantom containing a standard liquid source of {sup 22}Na to simulate a contaminated individual. The calibration of the HPGe coaxial detector for in vitro monitoring was performed at the Laboratorio de Medidas de Atividade de Radionuclideos (DIPRA/CRCN-NE/CNEN) with a standard source of {sup 22}Na. Base on the calibration factors, it was possible to determine the minimum detectable activities (MDA) for the systems by using direct measurements and simulation of uncontaminated urine. Then, through the biokinetic models published by ICRP 106 and edited by the AIDE software (version 6.0), it was possible to estimate the minimum detectable effective dose (MDED), which evaluates the detection sensitivity of the techniques developed. The MDED was estimated for in vivo and in vitro measurements performed 2.4 hours after the occurrence of incorporation by ingestion, since this is the period of higher retention fraction of activity in the brain compartment and accumulated urine for {sup 18}FDG. The values obtained were compared to the recording level of 1 mSv, recommended by the IAEA. After validation of in vivo monitoring technique, measurements of the IOE from DIPRA began shortly after the end of production and quality control procedures. The in vitro internal monitoring was not performed since there was not voluntary participation to obtain the biological sample (urine). The techniques developed showed sufficient sensitivity for application to occupational internal monitoring. (author)

  3. Collective dose estimation in Portuguese population due to medical exams of diagnostic radiology and nuclear medicine; Estimativa da dose coletiva na populacao portuguesa devido a exames medicos de radiologia de diagnostico e de medicina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Teles, Pedro; Vaz, Pedro [Instituto Tecnologico e Nuclear, Sacavem (Portugal). Instituto Superior Tecnico; Sousa, M. Carmen de [Instituto Portugues de Oncologia de Coimbra (Portugal); Paulo, Graciano; Santos, Joana [Escola Superior de Tecnologia da Saude de Coimbra (Portugal); Pascoal, Ana [Kings College Hospital, London (United Kingdom). Kings Health Partners; Cardoso, Gabriela; Santos, Ana isabel [Hospital Garcia de Orta, Almada (Portugal); Lanca, Isabel [Administracao Regional de Saude, Coimbra (Portugal); Matela, Nuno [Universidade de Lisboa (Portugal). Fac. de Ciencias. Instituto de Biofisica e Engenharia Biomedica; Janeiro, Luis [Escola superior de Saude da Cruz Vermelha Portuguesa, Lisboa (Portugal); Sousa, Patrick [Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Lisboa (Portugal); Carvoeiras, Pedro; Parafita, Rui [Medical Consult, SA, Lisboa (Portugal); Simaozinho, Paula [Administracao Regional de Saude, Faro (Portugal)

    2013-11-01

    In order to assess the exposure of the Portuguese population to ionizing radiation due to medical examinations of diagnostic radiology and nuclear medicine, a working group, consisting of 40 institutions, public and private, was created to evaluation the coletive dose in the Portuguese population in 2010. This work was conducted in collaboration with the Dose Datamed European consortium, which aims to assess the exposure of the European population to ionizing radiation due to 20 diagnostic radiology examinations most frequent in Europe (the 'TOP 20') and nuclear medicine examinations. We obtained an average value of collective dose of Almost-Equal-To 1 mSv/caput, which puts Portugal in the category of countries medium to high exposure to Europe. We hope that this work can be a starting point to bridge the persistent lack of studies in the areas referred to in Portugal, and to enable the characterization periodic exposure of the Portuguese population to ionizing radiation in the context of medical applications.

  4. Dose evaluation due to the effluent liberation by medical installations at city of Rio de Janeiro, Brazil; Avaliacao de doses devido a liberacao de efluentes por instalacoes medicas na cidade do Rio de Janeiro

    Energy Technology Data Exchange (ETDEWEB)

    Shu, Jane; Rochedo, Elaine R.R., E-mail: jshu@cnen.gov.b, E-mail: erochedo@cnen.gov.b [Comissao Nacional de Energia Nuclear (CODIN/CNEN), Rio de Janeiro, RJ (Brazil). Coordenacao de Instalacoes Nucleares; Heilbron, Paulo F.L., E-mail: paulo@cnen.gov.b [Comissao Nacional de Energia Nuclear (COREJ/CNEN), Rio de Janeiro, RJ (Brazil). Coordenacao de Rejeitos; Crispim, Verginia R., E-mail: verginia@con.ufrj.b [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), Rio de Janeiro, RJ (Brazil). Programa de Engenharia Nuclear

    2011-10-26

    This paper, the city of Rio de Janeiro was taken as a case study. It was processed deterministic and probabilistic simulations vor evaluation of the dose in two exposure sceneries, one of them referring to public members exposure and the other relative to exposure of sewage sanitary treatment plant workers. The results showed that at present the doses for inhabitants of the city and operators of treatment station are lower to dose limit established for the public, the approach presently in use in Brazil is not sufficient to accomplish whit international requirements and the regulation should be revised to be adopted specific values for each radionuclide

  5. Dose calculation for {sup 40}K ingestion in samples of beans using spectrometry and MCNP; Calculo de dose devido a ingestao de {sup 40}K em amostras de feijao utilizando espectrometria e MCNP

    Energy Technology Data Exchange (ETDEWEB)

    Garcez, R.W.D.; Lopes, J.M.; Silva, A.X., E-mail: marqueslopez@yahoo.com.br [Coordenacao dos Programas de Pos-Graduacao em Engenharia (COPPE/PEN/UFRJ), Rio de Janeiro, RJ (Brazil). Centro de Tecnologia; Domingues, A.M. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Instituto de Fisica; Lima, M.A.F. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Instituto de Biologia

    2014-07-01

    A method based on gamma spectroscopy and on the use of voxel phantoms to calculate dose due to ingestion of {sup 40}K contained in bean samples are presented in this work. To quantify the activity of radionuclide, HPGe detector was used and the data entered in the input file of MCNP code. The highest value of equivalent dose was 7.83 μSv.y{sup -1} in the stomach for white beans, whose activity 452.4 Bq.Kg{sup -1} was the highest of the five analyzed. The tool proved to be appropriate when you want to calculate the dose in organs due to ingestion of food. (author)

  6. A methodology to establish the appearance of cancer cases due to radiation dose in compressed breast; Uma metodologia para comprovar o aparecimento de casos de cancer devido a dose de radiacao na mama comprimida

    Energy Technology Data Exchange (ETDEWEB)

    Feital, Joao Carlos Da Silva; Delgado, Jose Ubiratan; Peixoto, Jose Guilherme P.; Fonseca, Hugo Geraldo Da, E-mail: jfeital@ird.gov.br, E-mail: delgado@ird.gov.br, E-mail: guilherm@ird.gov.br, E-mail: hfonseca@ird.gov.br [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2013-10-01

    It is known that more than 20% of the world's population will contract some type of cancer. In Brazil, with the exception of skin cancer (non melanoma) the breast cancer ranks first among the higher frequency of tumours among women and in general, although the methods of detection are advancing in the year 2010 took place about 13 thousand deaths in about 50,000 cases, probably due to late detection of these neoplasm. New cases of breast cancer in a given population can be proven from absorbed dose quantity, calculated for the compressed breast, due to the risk by means of exposure to x rays in this radiodiagnostic practices. Methodology: Exposures were held in an ionization chamber and the other quantities required were obtained to the screen-film equipment of mammography. Results: Also experimental results were of compressed breast an equivalent dose of ( 1.82 mSv {+-} 0.2%) or (3.64 mSv {+-} 0.2%) for both projections, i.e. medium lateral oblique and cranio caudal. The experimental value obtained here is consistent with the calculated results and published in the literature for analog and CR equipment. Conclusion: From the result of dose equivalent in the breast, one can say that there will be effectively attesting as to the appearance of new cases of cancer if approximately 80 million women are exposed to radiation emitted by mammographers. (author)

  7. Intrinsic spatial resolution limitations due to differences between positron emission position and annihilation detection localization; Limitacoes da resolucao espacial intrinseca devido as diferencas entre a posicao da emissao do positron e a deteccao da localizacao de aniquilacao

    Energy Technology Data Exchange (ETDEWEB)

    Perez, Pedro; Malano, Francisco; Valente, Mauro, E-mail: valente@famaf.unc.edu.ar [Universidad Nacional de Cordoba, Cordoba (Argentina). Fac. de Matematica, Astronomia y Fisica (FaMAF)

    2012-07-01

    Since its successful implementation for clinical diagnostic, positron emission tomography (PET) represents the most promising medical imaging technique. The recent major growth of PET imaging is mainly due to its ability to trace the biologic pathways of different compounds in the patient's body, assuming the patient can be labeled with some PET isotope. Regardless of the type of isotope, the PET imaging method is based on the detection of two 511-keV gamma photons being emitted in opposite directions, with almost 180 deg between them, as a consequence of electron-positron annihilation. Therefore, this imaging method is intrinsically limited by random uncertainties in spatial resolutions, related with differences between the actual position of positron emission and the location of the detected annihilation. This study presents an approach with the Monte Carlo method to analyze the influence of this effect on different isotopes of potential implementation in PET. (author)

  8. Change of the natural radiation exposure due to agriculture and industrial activities in a high natural radioactivity area from Brazil; Modificacao da exposicao a radiacao natural devido a atividades agricolas e industriais numa area de radioatividade natural elevada no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Silva Amaral, E.C. da

    1992-12-31

    The Pocos de Caldas Plateau, Minas Gerais State one of the biggest alkaline intrusions in the world. This study has shown the expected value for the mean annual radiation exposure due to the agricultural activities ranges from 6 up to 14 mSv/a depending on the age and living habits of the population group. The inhalation exposure of radon, thoron and their progenies represents the largest radiological health hazard (70-90%); this is followed by the external gamma irradiation from soil (10-25%). Ingestion of natural radionuclides with local food is only of minor radiological consequence. It was found that the lethal cancer risk might increase by 4% for a person born at the plateau, living and working there for the rest of her life. For the remote population the consumption the consumption of food products exported from the plateau leads to an expected value for the collective dose of 19 man Sv/a. This corresponding nominally to the small calculated number of 1 additional case of cancer per year. Therefore the main radiation impact of the agricultural activities are not the increased concentrations of natural radionuclides in food products but the fact that they are produced there with human labor and thus increasing the radiation exposure to a large number of farm workers and their families that move for occupational reasons to that region. The radiation exposure due to the mining and milling activities is, in spite of the significant increase of radionuclide activity concentrations in river waters, only of the order of 0.3 mSv/a. However as a recognized industrial source the ICRP dose limitation system has to be applied. Under this aspect the exposure calculated here, 0.3 mSv/a, should be considered as acceptable. (author). 93 refs, 16 figs, 58 tabs.

  9. Pneumoperitoneum due to perforated appendicitis: a rare anatomo-radiologic correlation Pneumoperitônio devido à apendicite perfurada: correlação anátomo-radiológica rara

    Directory of Open Access Journals (Sweden)

    André Luiz Santos Rodrigues

    2008-09-01

    Full Text Available BACKGROUND: Pneumoperitoneum is usually associated with a perforated peptic ulcer. However, perforated appendicits may be evolved on it. In the medical literature, the anatomo-radiologic correlation between them is an uncommon event. CASE REPORT: Man with 56-year-old look for assistance with diffuse abdominal pain and distension associated with fever, vomit and absence of flatus and evacuation for about 14 days. The chest radiography revealed a pneumoperitoneum. Diffuse peritonitis was found during the exploratory laparotomy. Appendectomy, peritoneal cavity cleaning and drainage with tubular drains were carried out. However, severe sepsis occurred and the patient died on the 16th post-operative day with multiple systemic organ failure. CONCLUSION: Although rare as pneumoperitoneum ethiology, acute appendicitis may be thought as it's cause.INTRODUÇÃO: Penumoperitôneo é usualmente associado à perfuração gástrica ou duodenal. Entretanto, apendicite perfurada pode também desenvolvê-lo. Na literatura, correlação clínica-radiológica é rara nesses eventos. RELATO DO CASO: Homem com 56 anos foi atendido com dor abdominal difusa, distensão abdominal e febre, vômitos, parada de eliminação de gazes e fezes por 14 dias. Estudo radiológico de tórax mostrou pneumoperitôneo. No procedimento cirúrgico, peritonite difusa foi encontrada e apendicectomia com lavagem abdominal e drenagem foi efetuada. Entretanto, o paciente morreu por sepse generalizada e falência múltipla de órgãos e sistemas no 16o. dia do pós-operatório. CONCLUSÃO: Embora rara como causa de pneumoperiotôneo, a apendicite aguda deve ser pensada como sua possível causa.

  10. THE ACOUSTIC CONTAMINATION OF SCHOOL ENVIRONMENT DUE TO URBAN NOISES IN THE FEDERAL DISTRICT, BRASIL = A CONTAMINAÇÃO ACÚSTICA DE AMBIENTES ESCOLARES DEVIDO AOS RUÍDOS URBANOS NO DISTRITO FEDERAL, BRASIL

    Directory of Open Access Journals (Sweden)

    Alexandre Eniz

    2006-01-01

    Full Text Available Urban noises are more and more presents in our daily life, invading residences, work places, leisure locations, hospitals and schools, becoming a potential harm to social interaction, communication, behavior, school performance, health etc. The main objective of this work was to analyze and quantify the environmental noise in ten schools of the basic education in District Federal, Brazil. The adopted parameter was the equivalent sound pressure level Leq (A, which was evaluated according to the sound level measures following the standard established by Brazilian Association of echnical Regulations (ABNT. The background noise was measured during holidays and during regular class periods. The study detected that half of the schools researched are being “contaminated” with noise from aircraft, road traffic, trucks, advertising vehicles, motorcycles, buses among other sources, with limits outside the recommended by law. In 90% of the evaluated schools, the noise levels observed during the activities are above of the maximum values recommended for the acoustic comfort of a school. These are buildings ill-located in the city and therefore “exposed” to levels that are above of recommended by the norms. The results show a critical situation indicating the urgent need of actions with the objective of mitigating this severe type of pollution. = Os ruídos urbanos estão cada vez mais presentes em nosso cotidiano, invadindo residências, locais de trabalho, de lazer, hospitais e escolas, podendo prejudicar as relações sociais, a comunicação, o comportamento, o rendimento escolar, a saúde etc. O objetivo principal deste trabalho foi analisar e quantificar o ruído ambiental em dez escolas do Ensino Fundamental e Médio no Distrito Federal. O parâmetro adotado foi o nível de pressão sonora equivalente Leq (A, avaliado por medidores de pressão sonora, segundo as normas estabelecidas pela Associação Brasileira de NormasTécnicas (ABNT. O ruído de fundo foi medido no recesso escolar e também durante o período normal de aula. Constatou-se que cinco das dez instituições pesquisadas convivem com níveis de ruídos advindos do tráfego de aviões, carros de passeio, caminhões, carros de propaganda, motocicletas, ônibus, entre outros que excedem oslimites recomendados pela legislação. Em 90% das escolas avaliadas, os níveis de ruídos observados durante as atividades estão acima dos valores máximos recomendados para o conforto acústico de uma escola. São edificações mal localizadas dentro da malha urbana, “expostas” a níveis de pressão sonora acima daqueles recomendados pelas normas. Os resultados encontrados revelam uma situação crítica, indicando a necessidade urgente de medidas que atenuem esta grave modalidade de poluição.

  11. Imaging findings and cerebral perfusion in arterial ischemic stroke due to transient cerebral arteriopathy in children; Achados de imagem e perfusao arterial cerebral em acidente vascular cerebral isquemico devido a arteriopatia transitoria em crianca

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa Junior, Alcino Alves, E-mail: alcinojr@uol.com.br [Departamento de Diagnostico por Imagem, Hospital Israelita Albert Einstein - HIAE, Sao Paulo, SP (Brazil); Ellovitch, Saada Resende de Souza [Neuropediatria, Hospital Israelita Albert Einstein - HIAE, Sao Paulo, SP (Brazil); Pincerato, Rita de Cassia Maciel [Hospital Samaritano, Sao Paulo, SP (Brazil)

    2012-04-15

    We report the case of a 4-year-old female child who developed an arterial ischemic stroke in the left middle cerebral artery territory, due to a proximal stenosis of the supraclinoid internal carotid artery, most probably related to transient cerebral arteriopathy of childhood. Computed tomography scan, magnetic resonance imaging, perfusion magnetic resonance and magnetic resonance angiography are presented, as well as follow-up by magnetic resonance and magnetic resonance angiography exams. Changes in cerebral perfusion and diffusion-perfusion mismatch call attention. As far as we know, this is the first report of magnetic resonance perfusion findings in transient cerebral arteriopathy. (author)

  12. Process business risk: a methodology for assessing and mitigating the financial impact of process plant accidents; Avaliacao de risco ao negocio devido a acidentes de processo em plantas industriais

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Ana Cristina C.; Bardy, Mariana B. [Det Norske Veritas (Brazil)

    2008-07-01

    Traditional risk management has focused on effects on people, particularly when using Quantitative Risk Assessment (QRA). A much broader approach is being adopted nowadays, with companies beginning to consider potential accidental losses in their decision making process. This paper describes a study where business risks from major accident hazards were assessed for a large petrochemical plant. The results are presented as F-Cost curves, which are similar to traditional F-N curves, but represent cumulative frequencies of events versus their cost, instead of fatalities. A different variety of costs can be evaluated as property damage, business interruption, inventory loss, environmental loss, clean-up costs, legal costs, fatality and injury costs, amongst others. As final objective of the study insurance values can be adjusted as well as decisions on reducing risk can be made based on the actual benefit, considering the reduction of losses and the amount to be spent on mitigating major risks. Also, values for civil liability insurance can be reviewed, based on the hazards that can result in fatalities and injuries, as well as property losses, for third parties. This paper presents the results of a study which involved the evaluation of the company's civil liability. The key driver was to consider a more accurate value for the company insurance policy, considering the different losses that major accident can lead on for a community and industries located nearby a petrochemical plant. The results of the analysis are presented as F-Cost curves and we describe the risk-based decision making process and criteria adopted by the company to set the maximum loss value to be insured for civil liability. In conclusion, this paper presents results from a real life example of the application of the quantitative evaluation of business risks, illustrating that a financial or business risk approach can help management in day-to-day decisions when considering possible effects of major chemical process accidents. (author)

  13. Reasons between effective doses for tomographic and mathematical models due to external exposition by photons; Razoes entre doses efetivas para modelos tomograficos e matematicos devido a exposicoes externas a fotons

    Energy Technology Data Exchange (ETDEWEB)

    Kramer, R.; Khoury, H.J. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Vieira, J.W. [Centro Federal de Educacao Tecnologica de Pernambuco (CEFET-PE), Recife, PE (Brazil); Yoriyaz, H. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Lima, F.R.A. [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil); Loureiro, E.C.M. [Escola Politecnica de Pernambuco (POLI/UPE), Recife, PE (Brazil)

    2005-07-01

    The development of Monte Carlo codes and new and sophisticated tomographic human models, or based on voxel, motivated the ICRP to propose a revision of the traditional exposition models, which have been used to calculate doses on organs and tissues using mathematical phantoms MIRD-type 5. This article presents calculations made with tomographic phantoms MAX (Male Adult voXel) and FAX (Female Adult voXel), recently developed and also, for comparison, with ADAM and Eve mathematician phantoms. All models were coupled to the EGS4 and MCNP4 codes for full body external irradiation by photons. It were simulated expositions AP, PA and rotational for energies varying between 10 keV and 10 MeV. The effective calculated doses were compared separately to evaluate: the replacement of the Monte Carlo code; the composition of the tissues and the replacement of tomographic phantoms by mathematical ones. Effective doses calculated results indicate that for external exposures by photons to introduce models based on voxels can cause a reduction of about 10% to the energies considered in this study.

  14. Ratios between effective doses for tomographic and mathematician models due to internal exposure of photons; Razoes entre doses efetivas para modelos tomograficos e modelos matematicos devido as exposicoes internas de fotons

    Energy Technology Data Exchange (ETDEWEB)

    Lima, F.R.A. [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil); Kramer, R.; Khoury, H.J.; Santos, A.M. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear; Vieira, W. [Centro Federal de Educacao Tecnologica de Pernambuco (CEFET-PE), Recife, PE (Brazil); Loureiro, E.C.M. [Escola Politecnica de Pernambuco, Recife, PE (Brazil)

    2005-07-01

    The development of new and sophisticated Monte Carlo codes and tomographic human phantoms or voxels motivated the International Commission on Radiological Protection (ICRP) to revise the traditional models of exposure, which have been used to calculate effective dose coefficients for organs and tissues based on mathematician phantoms known as MIRD5. This paper shows the results of calculations using tomographic phantoms MAX (Male Adult voXel) and FAX (Female Adult voXel), recently developed by the authors as well as with the phantoms ADAM and EVA, of specific genres, type MIRD5, coupled to the EGS4 Monte Carlo and MCNP4C codes, for internal exposure with photons of energies between 10 keV and 4 MeV to several organs sources. Effective Doses for both models, tomographic and mathematician, will be compared separately as a function of the Monte Carlo code replacement, of compositions of human tissues and the anatomy reproduced through tomographs. The results indicate that for photon internal exposure, the use of models of exposure based in voxel, increases the values of effective doses up to 70% for some organs sources considered in this study, when compared with the corresponding results obtained with phantoms of MIRD-5 type.

  15. The ratio between effective doses due to external exposure to electrons for tomographic and mathematical models; Razoes entre doses efetivas devido a exposicao externa de eletrons para modelos tomograficos e matematicos

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Fernando R.A. [Centro Regional de Ciencias Nucleares (CRCN), Recife, PE (Brazil)]|[Faculdade Boa Viagem (FBV), Recife, PE (Brazil)]. E-mail: falima@cnen.gov.br; Kramer, Richard; Khoury, Helen J. [Pernambuco Univ., Recife, PE (Brazil). Dept. de Energia Nuclear]. E-mail: rkramer@uol.com.br; hjkhoury@globo.com; Vieira, Jose W. [Centro Federal de Educacao Tecnologica de Pernambuco (CEFET-PE), Recife, PE (Brazil)]. E-mail: jwvieira@br.inter.net; Yoriyaz, Helio [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)]. E-mail: hyotiyaz@ipen.br; Loureiro, Eduardo C.M. [Universidade de Pernambuco, Recife, PE (Brazil). Escola Politecnica (POLI/UPE)]. E-mail: eduloureiro@uol.com.br

    2005-07-01

    The development of new, sophisticated Monte Carlo codes, and of tomographic or voxel based human phantoms motivated the International Commission on Radiological Protection (ICRP) to call for a revision of traditional exposure models, which have been used in the past to calculate organ and tissue as well as effective dose coefficients for stylized MIRD5- type phantoms. This paper reports about calculations made with the recently developed tomographic MAX (Male Adult voXel) and FAX (Female Adult voXel) phantoms, as well as with the gender-specific MIRD5-type phantoms ADAM and EVA, coupled to the EGS4 and to the MCNP4C Monte Carlo code, for external whole-body irradiation with electrons. Effective doses for the tomographic and for the stylized exposure models will be compared separately as function of the replacement of the Monte Carlo code, of human tissue compositions, and of the stylized by the tomographic anatomy. The results indicate that for external exposures to electrons the introduction of voxel-based exposure models causes changes of the effective dose between +40% and - 60% depending on the energies and geometries considered compared to corresponding data of the MIRD5-type phantoms. (author)

  16. Production and injectivity loss forecasting in the Campos Basin due to sulphate scaling; Previsao da perda da produtividade e de injetividade na Bacia de Campos devido a incrustacao de sulfatos

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Raphael Monteiro Pereira da [PETROBRAS, Rio de Janeiro, RJ (Brazil). Unidade de Negocios de Exploracao e Producao do Rio de Janeiro. Gerencia de Reservatorios], e-mail: raphael.monteiro@petrobras.com.br; Bedrikovetsky, Pavel G. [Universidade de Adelaide (Australia). Inst. Australiano de Petroleo], e-mail: pavel.russia@gmail.com

    2007-12-15

    Sulphate scaling is a serious problem for water flood in Campos Basin fields. This phenomenon results in the scaling up of the producers for seawater flood and a decline in injectivity during commingled co-injection of produced and seawater. This work has devised a analytical-model-based method to determine a kinetics coefficient from laboratory core flood, production well neighbourhood and injection well neighbourhood. The kinetic values and formation damage coefficients presented in this work have been calculated from twenty-three laboratory and twenty-two producer well data. The results obtained vary in the same range intervals. They validate the proposed mathematical model, allowing the application of the coefficients in reservoir simulations. Based on the production history of the wells of the Marlim and Namorado fields, the productivity index decline has been predicted by using the production well neighbourhood model. The well injection model permits the maximum safe concentration of sulphate in the desulphated seawater to be determined, with the result that the injectivity damage has been minimized for the Marlim Sul, Marlim, Jubarte, Albacora Leste, Roncador and Marlim Leste fields. (author)

  17. RELACIONAMENTO ENTRE A MUDANÇA DA REDE DE DRENAGEM DEVIDO À CONSTRUÇÃO DE ESTRUTURAS URBANAS E O SURGIMENTO DE VOÇOROCAS NO BAIRRO DO JARDIM BOTÂNICO NO DISTRITO FEDERAL

    Directory of Open Access Journals (Sweden)

    Leonardo Figueiredo de Freitas

    2013-09-01

    Full Text Available A alteração da superfície do terreno em decorrência da urbanização, por meio da instalação de estruturas como arruamentos e edificações, altera significativamente a dinâmica do escoamento superficial. Uma das consequências dessa alteração é a concentração do escoamento, o que pode desencadear o aparecimento de processos erosivos, como ravinas e voçorocas. Nesses processos além dos impactos a jusante, o avanço das erosões ameaça a própria estrutura urbana. O presente trabalho tem como objetivo aplicar um método desenvolvido para identificar zonas suscetíveis à ocorrência de processos erosivos no bairro do Jardim Botânico no Distrito Federal. O método é baseado na definição de dois cenários: (a pré-urbanização e (b pós-urbanização. Para estes cenários foram gerados modelos digitais de terreno e mapas de fluxo acumulado. A partir da subtração dos mapas de fluxo acumulado foram apontadas as zonas que receberam aumento ou redução do fluxo em decorrência da urbanização. O resultado dessa análise ficou altamente correlacionado com as erosões identificadas, bem como se constatou que a declividade é fundamental na definição das zonas suscetíveis. Esse método pode ser utilizado para auxiliar no planejamento de novas áreas de expansão urbana, ou, para replanejar áreas já existentes, em regiões com características semelhantes as do Distrito Federal.

  18. Granulomatous myelitis associated with hemorrhagic syndrome due to consumption of Vicia villosa by cattle Mielite granulomatosa associada à síndrome hemorrágica devido ao consumo de Vicia villosa em um bovino

    Directory of Open Access Journals (Sweden)

    Luciana Sonne

    2010-08-01

    Full Text Available An unusual case of spontaneous Vicia villosa poisoning affected a 6-year-old Holstein cow. Although the most striking findings included a generalized hemorrhagic condition associated with granulomatous myelitis, histological lesions typically seen with the vetch-associated systemic granulomatous syndrome were also present. Prominent gross findings were bloody nasal and oral discharges, disseminated hemorrhages, and bloody feces. Generalized hemorrhages associated with infiltration of numerous organs by lymphocytes, plasma cells, macrophages, multinucleated giants cells, and eosinophils were the main microscopic findings. Anti-CD68 immunostaining confirmed the presence of moderate histiocytic infiltrate and multinucleated giant cells in the bone marrow. These changes in the bone marrow probably caused the generalized hemorrhagic changes described here.Um bovino Holandês de seis anos naturalmente intoxicado pela Vicia villosa apresentou lesões não comumente encontradas nessa intoxicação. Embora a lesão mais evidente fosse hemorragia generalizada associada à mielite granulomatosa, as lesões granulomatosas típicas da intoxicação pela ervilhaca também estavam presentes histologicamente. Os principais achados macroscópicos foram hemorragias nasal e oral, hemorragias generalizadas e fezes com sangue. Lesões hemorrágicas generalizadas associadas com infiltrado inflamatório de linfócitos, plasmócitos, macrófagos, células gigantes multinucleadas e eosinófilos foram os principais achados microscópicos encontrados. O teste imuno-histoquímico anti-CD68 confirmou a presença de infiltrado moderado de macrófagos e de células gigantes multinucleadas na medula óssea. As alterações na medula óssea provavelmente constituem a causa da hemorragia generalizada descrita nesse caso.

  19. Revascularización pulpar mediante la utilización de plasma rico en plaquetas autólogo o en combinación con una matriz colágena, como posibilidades terapéuticas para dientes con ápice abierto, pulpa necrótica y/o patología periapical.

    OpenAIRE

    Paula Alejandra Camargo Guevara; Henry Sossa Rojas

    2014-01-01

    Objetivo: describir el uso del plasma rico en plaquetas autólogo o en combinación con una matriz colágena como posibilidades terapéuticas de revascularización en dientes con ápices abiertos, pulpa necrótica y/o lesión periapical. Métodos: se realizó una búsqueda temática de la literatura entre los años 2007 y 2013, por medios electrónicos, bases de datos, revistas y journals con alto impacto en endodoncia. Resultados: la endodoncia regenerativa es un procedimiento biológico diseñado para reem...

  20. Revascularización pulpar mediante la utilización de plasma rico en plaquetas autólogo o en combinación con una matriz colágena, como posibilidades terapéuticas para dientes con ápice abierto, pulpa necrótica y/o patología periapical.

    Directory of Open Access Journals (Sweden)

    Paula Alejandra Camargo Guevara

    2014-07-01

    Full Text Available Objetivo: describir el uso del plasma rico en plaquetas autólogo o en combinación con una matriz colágena como posibilidades terapéuticas de revascularización en dientes con ápices abiertos, pulpa necrótica y/o lesión periapical. Métodos: se realizó una búsqueda temática de la literatura entre los años 2007 y 2013, por medios electrónicos, bases de datos, revistas y journals con alto impacto en endodoncia. Resultados: la endodoncia regenerativa es un procedimiento biológico diseñado para reemplazar estructuras lesionadas, enfermas o ausentes del complejo pulpo-dentinal. Hay tres factores que guían y permiten la regeneración tisular: células madre mesenquimales (MSC, que pueden diferenciarse y apoyar la continuación en el desarrollo radicular, factores de crecimiento (GF, para la inducción de la proliferación celular y la diferenciación, y un andamio adecuado que brinde soporte y promueva la migración, crecimiento y la diferenciación celular. El colágeno y el plasma rico en plaquetas (PRP han sido reportados como andamios de elección en la regeneración endodóntica, se dice que estimulan la formación de tejido, la organización y la adherencia celular, mejorando el tiempo de tratamiento y de evolución. Conclusiones: en los procedimientos de revascularización, elegir un andamio o soporte tridimensional como el colágeno tipo I o PRP sumado a la inducción de los tejidos periapicales, aumenta las posibilidades de éxito en el tratamiento de regeneraciónendodóntica gracias a las propiedades que brindan y a la interacción molecular.

  1. AP Potential™ Expectancy Tables Based on PSAT/NMSQT® and SAT® Scores on the 2015-16 Redesigned Scales. Statistical Report 2016-2

    Science.gov (United States)

    Ewing, Maureen; Wyatt, Jeffrey N.; Smith, Kara

    2016-01-01

    Historically, AP Potential™ has used PSAT/NMSQT® scores to identify students who are likely to earn a 3 or higher on a specific AP® Exam--based on research showing moderate to strong relationships between PSAT/NMSQT scores and AP Exam scores (Camara & Millsap, 1998; Ewing, Camara & Millsap, 2006; Zhang, Patel & Ewing, 2014a). For most…

  2. Description of the XXXIV ARCAL Project {sup R}epairing and calibration of electrometers and ionization chambers used in radiotherapy; Descripcion del proyecto ARCAL XXXIV {sup R}eparacion y calibracion de electrometros y camaras de ionizacion utilizados en radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Cruz E, P.; Villaverde L, A. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2002-07-01

    The technological tools from what the humanity has for the illnesses diagnosis and the cancer treatment, are based in great extent in the use of ionizing radiations. This situation worries to the International Atomic Energy Agency (IAEA), which has implemented technical cooperation programs for protecting the human health. In Latin America the ARCAL program (Regional Agreement of Cooperation for Promotion of Nuclear Science and Technology in Latina America and the Caribbean was created. The Project ARCAL XXXIV has as objective to establish three regional centers of repairing, maintenance and electric calibration of clinical dosemeters, equipment made up for an ionization chamber and an electrometer which is used in radiotherapy to generate calibration procedures, personnel training, establishment of an intercomparison net for the electrometers control used as standards and designing current intensity sources which serve as work standards for each one of the participant countries, Mexico is one of them. (Author)

  3. Improvement of the performance of a new type of single chamber microbial fuel cell compared to a conventional cell; Mejora del desempeno de un nuevo tipo de celda de combustible microbiana de una camara comparado con una celda convencional

    Energy Technology Data Exchange (ETDEWEB)

    Vazquez Larios, A.L.; Vazquez-Huerta, G.; Esparza-Garcia, F.; Solorza-Feria, O.; Poggi Varaldo, H.M. [Centro de Investigacion y de Estudios Avanzados del IPN, Mexico D.F. (Mexico)]. E-mail: hectorpoggi2001@gmail.com; linevazquez@yahoo.com.mx

    2009-09-15

    The objective of this work was to design, build and operate a new type of microbial fuel cell (MFC-A) and evaluate the architectural changes in the production of electricity. The results were compared with those of a standard fuel cell (MFC-B). The MFC-A consisted of a horizontal acrylate cylinder with two systems of sandwiched electrodes (each with a anode proton exchange membrane-cathode) separated by 78 mm. The MFC-B consisted of an anode and a cathode each in the opposite faces of the cell. The internal resistance of the cells were determined with polarization curves. The cells were operated in batch during 50 h at 30 degrees Celsius obtained with 38 mW/m{sup 2} and 5 mW/m{sup 2} for MFC-A and MFC-B, respectively. The changes in the architecture of the cell and design of the electrodes occurred at a power density 8 times greater, associated with the decrease in internal resistance of 1200 and 3900 {Omega} for MFC-A and MFC-B, respectively. The change in architecture (double electrode in the same volume for MFC-A) enabled obtaining a 13 times greater potential per unit volume, with 922 mW/m{sup 3} in the new MFC-A cell versus 69 mW/m{sup 3} in MFC-B. [Spanish] El objetivo de este trabajo fue disenar, construir y operar una celda de combustible microbiana de nuevo tipo (CCM-A), y evaluar los cambios de arquitectura en la produccion de electricidad. Los resultados fueron comparados con los de una celda de combustible estandar (CCM-B). La CCM-A consistio de un cilindro horizontal de acrilato, con dos sistemas de electrodos emparedados (cada uno con catodo/membrana de intercambio protonico/anodo) separados por 78 mm. La CCM-B consistio de un anodo y un catodo cada uno en las caras opuestas de la celda. Las Ri de las celdas fueron determinadas por curva de polarizacion. Las celdas fueron operadas en lote durante 50 h, a 30 grados centigrados, y fueron inoculadas con un inoculo sulfato reductor (In-SR) y cargadas con un extracto modelo similar al perfil de metabolitos, generados en la produccion biologica de hidrogeno a partir de residuos solidos municipales. La densidad de potencia maxima a 30 grados centigrados obtenida fue 38 mW/m{sup 2} y 5 mW/m{sup 2} para la CCM-A y CCM-B respectivamente. Los cambios en la arquitectura de la celda y el diseno de los electrodos dieron lugar a una densidad de potencia ocho veces mayor, asociado a la disminucion de la resistencia interna (Ri), de 1200 y 3900 {Omega} para CCM-A y CCM-B, respectivamente. El cambio de arquitectura (doble electrodo en el mismo volumen para CCM-A) permitio obtener potencias por unidad de volumen 13 veces superior, siendo 922 mW/m{sup 3} en la nueva celda CCM-A, contra 69 mW/m{sup 3} en CCM-B.

  4. Analysis of the internal temperature of the combustion chamber of a compact system of co-generation; Analise das temperaturas internas da camara de combustao de um sistema compacto de co-geracao

    Energy Technology Data Exchange (ETDEWEB)

    Duarte, Joao B.F. [Universidade de Fortaleza (UNIFOR), CE (Brazil)], email: furlan@unifor.br; Couto, Heraldo S. [Instituto Nacional de Pesquisas Espaciais (INPE), Cachoeira Paulista, SP (Brazil)], email: heraldo@lcp.inpe.br; Holanda, Carlos A.M. de [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Engenharia Metalurgica e de Materiais], email: almir@metalmat.ufc.br

    2008-07-01

    Nowadays, the energy deficit represents one of the biggest governmental challenges, since there is still a great number of communities living in areas without electricity energy; and thus without access to electro-electronic equipment such as television, refrigerators, computers. The main focus of this work is to present the possibility of electricity energy generation in conjunction with the frozen or hot water production in for places without electricity transmission nets or even any type of alternative power plants. The system is based on the standard air cycle called Brayton cycle composed of a turbo-compressor model 4LGZ from BorgWarner, a combustion chamber, a power turbine, a heat exchanger, a water-ammonia chiller, a 5.0 kV A generator, and a command panel for automation and distribution of energy. This system that uses natural gas or LPG, will supply electric energy from the generator, hot water from the heat exchange with the gases of combustion, and water frozen from chiller using as the hot source the gases proceeding from the power system. The prototype is already being tested and the first results obtained are excellent. In this paper, we analyze the internal combustion chamber temperatures. (author)

  5. Intercomparison of ionization chambers in standard X-ray beams, at radiotherapy, diagnostic radiology and radioprotection levels; Intercomparacao de camaras de ionizacao em feixes padroes de raios X, niveis radioterapia, radiodiagnostico e radioprotecao

    Energy Technology Data Exchange (ETDEWEB)

    Bessa, Ana Carolina Moreira de

    2006-07-01

    Since the calibration of radiation measurement instruments and the knowledge of their major characteristics are very important subjects, several different types of ionization chambers were intercompared in terms of their calibration coefficients and their energy dependence, in radiotherapy, diagnostic radiology and radioprotection standard beams. An intercomparison of radionuclide calibrators for nuclear medicine was performed, using three radionuclides: {sup 67}Ga, {sup 201}Tl and {sup 99m}Tc; the results obtained were all within the requirements of the national standard CNEN-NE-3.05. In order to complete the range of radiation qualities of the Calibration Laboratory of IPEN, standard radiation beam qualities, radiation protection and low energy radiation therapy levels, were established, according international recommendations. Three methodologies for the calibration of unsealed ionization chambers in X-ray beams were studied and compared. A set of Victoreen ionization chambers, specially designed for use in laboratorial intercomparisons, was submitted to characterization tests. The performance of these Victoreen ionization chambers showed that they are suitable for use in radioprotection beams, because the results obtained agree with international recommendations. However, these Victoreen ionization chambers can be used in radiotherapy and diagnostic radiology beams only with some considerations, since their performance in these beams, especially in relation to the energy dependence and stabilization time tests, did not agree with the international recommendations for dosimeters used in radiotherapy and diagnostic radiology beams. This work presents data on the performance of several types of ionization chambers in different X-ray beams, that may be useful for choosing the appropriate instrument for measurements in ionizing radiation beams. (author)

  6. Characterization of an extrapolation chamber and radiochromic films for verifying the metrological coherence among beta radiation fields; Caracterizacao de uma camara de extrapolacao e filmes radiocromicos para verificacao da coerencia metrologica entre campos padroes de radiacao beta

    Energy Technology Data Exchange (ETDEWEB)

    Castillo, Jhonny Antonio Benavente

    2011-07-01

    The metrological coherence among standard systems is a requirement for assuring the reliability of dosimetric quantities measurements in ionizing radiation field. Scientific and technologic improvements happened in beta radiation metrology with the installment of the new beta secondary standard BSS2 in Brazil and with the adoption of the internationally recommended beta reference radiations. The Dosimeter Calibration Laboratory of the Development Center for Nuclear Technology (LCD/CDTN), in Belo Horizonte, implemented the BSS2 and methodologies are investigated for characterizing the beta radiation fields by determining the field homogeneity, the accuracy and uncertainties in the absorbed dose in air measurements. In this work, a methodology to be used for verifying the metrological coherence among beta radiation fields in standard systems was investigated; an extrapolation chamber and radiochromic films were used and measurements were done in terms of absorbed dose in air. The reliability of both the extrapolation chamber and the radiochromic film was confirmed and their calibrations were done in the LCD/CDTN in {sup 90}Sr/{sup 90}Y, {sup 85}Kr and {sup 147}Pm beta radiation fields. The angular coefficients of the extrapolation curves were determined with the chamber; the field mapping and homogeneity were obtained from dose profiles and isodose with the radiochromic films. A preliminary comparison between the LCD/CDTN and the Instrument Calibration Laboratory of the Nuclear and Energy Research Institute / Sao Paulo (LCI/IPEN) was carried out. Results with the extrapolation chamber measurements showed in terms of absorbed dose in air rates showed differences between both laboratories up to de -I % e 3%, for {sup 90}Sr/{sup 90}Y, {sup 85}Kr and {sup 147}Pm beta radiation fields, respectively. Results with the EBT radiochromic films for 0.1, 0.3 and 0.15 Gy absorbed dose in air, for the same beta radiation fields, showed differences up to 3%, -9% and -53%. The beta radiation field mappings with radiochromic films in both BSS2 showed that some of them were not geometrically aligned. (author)

  7. Impacts of lost fast ions on the TJ-II Vacuum Vessel during NBI; Impactos de los iones rapidos en la Camara de Vacio del TJ-II durante NBI

    Energy Technology Data Exchange (ETDEWEB)

    Guasp, J.

    1995-07-01

    The possible deposition patterns, on the Vacuum Vessel, of lost fast ions during the balanced tangential NBI in TJ-II helical axis Stellarator are analysed theoretically, establishing the relation between those impact points, the plasma exit and birth positions and the magnetic configuration characteristics. It is shown that direct losses are the most important, mainly those produced by the beam injected with the same direction that the magnetic field, increasing with beam energy and plasma density but with impacts remaining fixed on well defined zones, a periodically distributed along the Hard Core cover plates, producing high loads at high densities. The remaining losses, except for the shine through ones that predominate at low density, are periodically distributed, with smooth maxima and produce very low loads. No overlapping between the different kind of losses or beams is observed. (Author) 6 refs.

  8. Performance of the Drift Chambers of the CMS Experiment in the Measurement of LHC Muons; Prestaciones de las Camaras de Deriva del Experimento CMS en la Deteccion de Muones del LHC

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez, D.; Fouz, M. C.

    2011-05-13

    This work deals with the study of the performance of the drift chambers of the CMS Barrel Muon detector operating at the LHC. Using the data obtained with pp collisions during the first months os LHC operation we have studied the drift cell efficiency and position resolution, as well as the effect of the existing background noise. The results confirm the excellent performance of the muon chambers. It is expected that it will improve further as statistics increase, thus allowing a correct calibration and alignment of these chambers. (Author) 6 refs.

  9. Performance Analysis of a Bunch and Track Identifier Prototype (BTI) for the CMS Barrel Muon Drift Chambers; Estudio de las Prestaciones de un Prototipo de Bunch and Track Identifier (BTI) para las Camaras de Deriva de CMS

    Energy Technology Data Exchange (ETDEWEB)

    Puerta Pelayo, J.

    2001-07-01

    This note contains a short description of the first step in the first level trigger applied to the barrel muon drift chambers of CMS: the Bunch and Track Identifier (BTI). The test beam results obtained with a BTI prototype have been also analysed BTI performance for different incidence angles and in presence of external magnetic field has been tested, as well as BTI capability as trigger device and track reconstructor. (Author) 30 refs.

  10. Experimental comparison of profiles of acquired small fields with ionization chambers, diodes, radiochromic s and TLD films; Comparacion experimental de perfiles de campos pequenos adquiridos con camaras de ionizacion, diodos, peliculas radiocromicas y TLD

    Energy Technology Data Exchange (ETDEWEB)

    Venencia, D.; Garrigo, E. [Instituto Privado de Radioterapia, Obispo Oro 423, X5000BFI Cordoba (Argentina); Filipuzzi, M. [Instituto Balseiro, Centro Atomico Bariloche, Av. Bustillo 9500, 8400 Bariloche - Rio Negro (Argentina); Germanier, A., E-mail: devenencia@radioncologia-zunino.org [Centro de Excelencia en Productos y Procesos, Santa Maria de Punilla, 5164 Cordoba (Argentina)

    2014-08-15

    The use of radiation small fields, introduced by new techniques, can bring a considerable uncertainty in the precision of the acquired profiles, due to the conditions of lateral electronic non-equilibrium and the perturbations introduced by the detectors (volume effect and alteration of the charged particles flowing) [Das et al., 2007]. The development of new miniature detectors looks to diminish the uncertainty created by the material and the size of the sensitive volume of the dosimeter. For this reason, comparative measurements for three sizes of square field were carried out (20 mm, 10 mm and 5 mm, of side) using a detectors series: 3 ionization chambers (PTW-31003, IBA-CC04, PTW-31016), 2 diodes (PTW-60012, IBA-Sfd), thermoluminescent detectors micro-cubes of 1 mm of edge (TLD-700) and radiochromic s films EBT-3. These last two were used as reference detectors, due to their spatial high resolution and similar performance with Monte Carlo simulations [Francescon et al., 1998]. So much the thermoluminescent detectors as the radiochromic films resolved the profiles in a similar way. Both diodes responded correctly, but the rest of the detectors overestimated the gloom of the fields, which allows conclude that the used TLD (and both diodes) can resolve field sizes correctly, usually utilized in radio-surgery, without producing significant alterations in the acquired data. (author)

  11. Analysis on the Selection and Array of Photomultiplier for the SmallγCAMARA%某小型酌相机用光电倍增管的挑选与排布

    Institute of Scientific and Technical Information of China (English)

    彭丽男

    2014-01-01

    The model of the PMT for the small γ camera is CR173. When selecting them for the detector, we need to consider the energy resolution, the position uniformity, the stability, and the consistency.%某小型酌相机使用的光电倍增管(PMT)型号为CR173,挑选时依据高的能量分辨率,好的位置均匀性等原则进行初步选择,然后复测其稳定性,最终根据一致性原则决定应用于每个探头的光电倍增管组合。

  12. Adapting a Common Photographic Camera to Take Pictures of the Sky. (Spanish Title: Adaptando Una Camara Fotografica Comun Para Obtener Fotografias del Cielo.) Adaptando Uma Câmera Fotográfica Manual Simples Para Fotografar o Céu

    Science.gov (United States)

    Danhoni Neves, Marcos Cesar; Pereira, Ricardo Francisco

    2007-12-01

    In this paper will be introduced a method of astrophotography using a non-reflex photographic camera (a low-cost method). It will be revised some photographic processes commonly used nowadays for comparison with the aims of this paper. En este trabajo será introducido un método de astrofotografia que utiliza una cámara fotográfica non-reflex (un método de bajo costo). Serán revisados algunos procesos fotográficos comúnmente utilizados actualmente para comparación con los objetivos de este trabajo. O presente artigo procura introduzir um método de astrofotografia utilizando uma câmera fotográfica não reflex, de baixo custo. É feita uma revisão do processo fotográfico comumente empregado para fins de comparação com os objetivos pretendidos no presente trabalho.

  13. Ion chamber-electrometer measurement system for radiation protection tests in X-ray equipment for interventional procedures; Sistema de medicao camara de ionizacao-eletrometro para ensaios de protecao radiologica em equipamentos de raios X para procedimentos intervencionistas

    Energy Technology Data Exchange (ETDEWEB)

    Bottaro, Marcio

    2012-07-01

    A new parallel plate ionization chamber with volume of 500 cc and an electrometer with digital interface for data acquisition, configuring an ion chamber electrometer measurement system, were developed to comply with specific requirements for compulsory radiation protection tests in interventional X-ray equipment. The ion chamber has as main characteristics: low cost, mechanical strength and response variation with beam energy of less than 5% in the 40 kV to 150 kV range. The electrometer has a high gain (5x10{sup 8} V/A) transimpedance amplifier circuit and a data acquisition and control system developed in LabVIEW Registered-Sign platform, including an integrated power supply for the ion chamber bias with adjustable DC voltage output from O to 1000 V and an air density correction system. Electric field calculations, laboratory measurements in standard beams and computational simulations of radiation interactions in chamber volume with Monte Carlo Method were employed in the elaborated methodology of the ion chamber development, which was tested and validated. It was also developed a simplified methodology for electrometer calibration that assures metrological trustworthiness of the measurement system. Tests for the system performance evaluation as environmental influence response, energy response, angular dependency, linearity and air kerma and air kerma rate dependency were performed according to international standards and requirements. Additionally, for a detailed evaluation of the developed ion chamber, simulations with various scattered radiation spectra were performed. The system was applied in leakage radiation, residual radiation and scattered radiation tests, being compared with other reference systems and validated for laboratorial test routine. (author)

  14. Project, construction and characterization of ionization chambers for use as standard systems in X and gamma radiation beams; Projeto, construcao e caracterizacao de camaras de ionizacao para utilizacao como sistemas padroes em feixes de radiacao X e gama

    Energy Technology Data Exchange (ETDEWEB)

    Perini, Ana Paula

    2013-07-01

    Ionization chambers present some advantages in relation to other dosimeters: easiness of handling, low energy dependence and high precision. The advantages associated to ionization chambers and the large number of diagnostic radiology exams and therapeutic treatments motivated the development of this PhD program. In this project ionization chambers were developed and characterized to be applied in diagnostic radiology and therapy beam dosimetry, with high precision and performance, in compliance with international recommendations. They were assembled in a simple way, utilizing low-cost national materials, so they can be reproduced and applied at calibration laboratories. The project of these ionization chambers presents some differences in relation to commercial ionization chambers, as the materials utilized and geometrical arrangements. Besides the development of the ionization chambers to be utilized in standard X-ray beam dosimetry as work standard systems, two graphite parallel-plate ionization chambers were developed and characterized to be applied as reference standard systems for determining the air kerma rates of gamma radiation sources. Comparing the air kerma rates determined with the reference standard of the Calibration Laboratory of IPEN, a Farmer ionization chamber, with the values of the air kerma rates obtained with the graphite ionization chambers, the maximum differences obtained were only 1.7% and 1.2% for the G1 and G2 graphite ionization chambers, respectively. Moreover, these ionization chambers presented correction factors close to 1.000, which is ideal for an ionization chamber be characterized as a reference standard system. (author)

  15. Automatic control system for measuring currents produced by ionization chambers; Automatizacao de um sistema de medidas de correntes produzidas por camaras de ionizacao e aplicacao na calibracao do {sup 18}F e {sup 153}Sm

    Energy Technology Data Exchange (ETDEWEB)

    Brancaccio, Franco

    2002-07-01

    Ionization Chambers in current mode operation are usually used in Nuclear Metrology. Activity measurements are quickly performed by Ionization Chambers, with very good precision. For this purpose measurements of very low ionization currents, carried out by high quality instrumentation, are required. Usually, electrometers perform the current integration method under command of signals from an automation system, in order to reduce the measurement uncertainties. Among the measurement systems at the Laboratorio de Metrologia Nuclear (LMN) of IPEN, there are two ionization chamber systems. In the present work, an automation system developed for current integration measurements is described. This automation system is composed by software (graphic interface and control) and an electronic module connected to a microcomputer, by means of a commercial data acquisition card. Several test measurements were performed in order to determine the intrinsic uncertainty, linearity and stability of the system. Using calibrated radioactive solutions, the IG12/A20 chamber calibration factors for {sup 18}F and {sup 153}Sm were obtained, making possible to determine activities of these radionuclides. (author)

  16. Simulation of the Interaction of X-rays with a Gas in an Ionization Chamber by the Monte Carlo Method; Simulacion Monte Carlo de la Interaccion de Rays X con el Gas de una Camara de Ionizacion

    Energy Technology Data Exchange (ETDEWEB)

    Grau Carles, A.; Garcia Gomez-Tejedor, G.

    2001-07-01

    The final objective of any ionization chamber is the measurement of the energy amount or radiation dose absorbed by the gas into the chamber. The final value depends on the composition of the gas, its density and temperature, the ionization chamber geometry, and type and intensity of the radiation. We describe a Monte Carlo simulation method, which allows one to compute the dose absorbed by the gas for a X-ray beam. Verification of model has been carried out by simulating the attenuation of standard X-ray radiation through the half value layers established in the ISO 4037 report, while assuming a Weibull type energy distribution for the incident photons. (Author) 6 refs.

  17. Design and fabrication of a chamber for the deposit of thin films by laser ablation; Diseno y fabricacion de una camara para el deposito de peliculas delgadas por ablacion laser

    Energy Technology Data Exchange (ETDEWEB)

    Chirino O, S.; Escobar A, I.; Camps C, E.; Garcia E, J.I. [Departamento de Fisica, ININ, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2000-07-01

    The laser ablation technique is an alternative for the obtention of thin films which is less expensive, more reliable, efficient and with some advantages with respect to conventional processes. On of the most important components which forms a laser ablation system is the vacuum chamber, that has as general purposes the following: a) To carry out studies about plasma such as optical emission spectroscopy and measurements by deflectometry. b) To carry out an In situ monitoring about the film growth through the reflectivity measurements of the combination substrate-film. c) To deposit thin films of different materials such as oxides, carbon, metals, etc. In this work it is showed how the vacuum chamber was designed and made to perform the store of thin films by laser ablation and for characterising the formed plasma as a result of the ablation process. The chamber design was enough versatile that will allow to add it more accessory just making it simple modifications. Its cost was very cheap more or less one twentieth of a commercial chamber. (Author)

  18. Use of two-dimensional chamber arrays in volumetric modulated arc therapy treatment verification; Empleo de matrices bidimensionales de camaras de ionizacion en la verificacion de tratamientos de arcoterapia volumetrica modulada

    Energy Technology Data Exchange (ETDEWEB)

    Clemente Gutierrez, F.; Perez Vara, C.; Prieto Villacorta, M.; Fernandez Ruiz, M. L.; Ruiz Prados, M.

    2013-09-01

    Volumetric modulated arc therapy (VMAT) requires, as another kind of intensity-modulated radiation therapy (IMRT), patient-specific QA procedures. This work analyzes the method carried out in our institution for VMAT treatment verification. Our hypothesis is that traditional IMRT QA is valid for VMAT technique. Results obtained for absolute point-dose measurements with ion chamber are presented, as well as comparison with treatment planning system calculations (mean difference of (-0.50 {+-} 0.43)%). In addition, different setups with 2D ion chamber array for dose distributions comparison are analyzed. These detectors are the basis of our QA procedure. Advantages and disadvantages of those setups are shown. The present study includes results for 111 patients treated with VMAT technique from different disease sites. We conclude that 2D ion chamber arrays traditionally used in IMRT QA are valid detectors for rotational techniques if these arrays are used together with additional devices (phantoms, accessories) that allow us to obtain as much information as possible. (Author)

  19. Evaluating uncertainties in the cross-calibration of parallel ion chambers used in electron beam radiotherapy; Avaliacao das incertezas no processo de calibracao cruzada de camaras de placas paralelas utilizadas em feixes de eletrons para radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, Ernani; Travassos, Paulo; Ferreira, Max da Silva; Carvalho, Samira Marques de; Silva, Michele Maria da; Peixoto, Jose Guilherme Pereira, E-mail: ernanianderson@hotmail.com [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Salmon Junior, Helio Augusto [Grupo COI - Clinicas Oncologicas, Rio de Janeiro, RJ (Brazil)

    2015-07-01

    This study aims to estimative the combined standard uncertainty for a detector parallel plate used for dosimetry of electron beams in linear accelerators for radiotherapy, which has been calibrated by the cross-calibration method. Keeping the combined standard uncertainty next of the uncertainty informed in the calibration certificate of the reference chamber, become possible establish the calibration factor of the detector. The combined standard uncertainty obtained in this study was 2.5 %. (author)

  20. Singler-chamber SOFCs based on gadolinia doped ceria operated on methane and propane; Pilas de combustible de una sola camara, basadas en electrolitos de ceria dopada con gadolinia y operadas con metano y propano

    Energy Technology Data Exchange (ETDEWEB)

    Morales, M.; Roa, J. J.; Capdevila, X. G.; Segarra, M.; Pinol, S.

    2010-07-01

    The main advantages of single-chamber solid oxide fuel cells (SOFCs) respect to dual-chamber SOFCs, are to simplify the device design and to operate in mixtures of hydrocarbon (methane, propane...) and air, with no separation between fuel and oxidant. However, this design requires the use of selective electrodes for the fuel oxidation and the oxidant reduction. In this work, electrolyte-supported SOFCs were fabricated using gadolinia doped ceria (GDC) as the electrolyte, Ni + GDC as the anode and LSC(La{sub 0}.5Sr{sub 0}.5CoO{sub 3}-{delta})-GDC-Ag{sub 2}O as the cathode. The electrical properties of the cell were determined in mixtures of methane + air and propane + air. The influence of temperature, gas composition and total flow rate on the fuel cell performance was investigated. As a result, the power density was strongly increased with increasing temperature, total flow rate and hydrocarbon composition. Under optimized gas compositions and total flow conditions, power densities of 70 and 320 mW/cm{sup 2} operating on propane at a temperature of 600 degree centigrade and methane (795 degree centigrade) were obtained, respectively. (Author)

  1. Characterization of a free-air ionization chamber in direct X-ray beams as used in mammography; Caracterizacao de uma camara de ionizacao de ar-livre em feixes diretos de raios X utilizados em mamografia

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Mateus Hilario de

    2014-08-01

    At this work stability and characterization tests were undertaken on a Victoreen free-air ionization chamber, model 481. The tests were realized using direct X-ray beams as a contribution for its establishment as a primary standard system of the quantity air kerma. The characterization tests were: saturation curve, ion collection efficiency, polarity effect, response linearity with the air kerma rate and response linearity with the chamber volume variation. The ion collection efficiency allowed the determination of the ion recombination factor. Most of the test results showed agreement with the limits established by international standards. Furthermore, the air attenuation factors for the mammography beams with aluminum and molybdenum filters were obtained. The factors for photon transmission and scattering at the diaphragm edges were also determined for mammography beams with aluminum filter and for the standard beam with molybdenum filter. (author)

  2. Evaluation of a new pencil-type ionization chamber for dosimetry in computerized tomography beams; Avaliacao de uma nova camara de ionizacao tipo lapis para dosimetria em feixes de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Maysa C. de; Neves, Lucio P.; Silva, Natalia F. da; Santos, William de S.; Caldas, Linda V.E., E-mail: maysadecastro@gmail.com, E-mail: lpneves@ipen.br, E-mail: na.fiorini@gmail.com, E-mail: wssantos@ipen.br, E-mail: lcaldas@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2014-07-01

    For performing dosimetry in computed tomography beams (CT), use is made of a pencil-type ionization chamber, since this has a uniform response to this type of beam. The common commercial chambers in Brazil have a sensitive volume length of 10 cm. Several studies of prototypes of this type of ionization chamber have been conducted, using different materials and geometric configurations, in the Calibration Laboratory Instruments of the Institute of Nuclear and Energy Research (LCI) and these showed results within internationally acceptable limits. These ion chambers of 10 cm are widely used nowadays, however studies have revealed that they have underestimated the dose values. In order to solve this problem, we developed a chamber with sensitive volume length of 30 cm. As these are not yet very common and no study has yet been performed on LCI conditions on their behavior, is important that the characteristics of these dosemeters are known, and the influence of its various components. For your review, we will use the Monte Carlo code Penelope, freely distributed by the IAEA. This method has revealed results consistent with other codes. The results for this new prototype can be used in dosimetry of the CT of the hospitals and calibration laboratories as the LCI.

  3. Relative dosimetry of photon beam of 6 MV with a liquid ionization chamber; Dosimetria relativa de un haz de fotones de 6 MV con una camara de ionizacion liquida

    Energy Technology Data Exchange (ETDEWEB)

    Benitez Villegas, E. M.; Casado Villalon, F. J.; Martin-Cueto, J. A.; Caudepon Moreno, F.; Garcia Pareja, S.; Galan Montenegro, P.

    2011-07-01

    The increasing use of reduced size fields in the special techniques of treatment generates regions with high dose gradients. It therefore requires the use of detectors that present high spatial resolution. The aim of this study is to compare the dosimetric measurements obtained with a liquid ionization chamber PTW MicroLion recently acquired with other commonly used detectors for a photon beam of 6 MV linear electron accelerator Varian 600DBX.

  4. Evaluation of the use of radiochromic films alongside of the ionization chamber and TLDs in measuring peripheral doses; Avaliacao do uso de filmes radiocromicos ao lado de camara de ionizacao e TLDs na mensuracao de doses perifericas

    Energy Technology Data Exchange (ETDEWEB)

    Soboll, Danyel S.; Wolter, Brenda Von; Nascimento, Josiane Q., E-mail: soboll@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Viamonte, Alfredo; Alves, Victor G.L., E-mail: aviamonte@inca.gov.br [Instituto Nacional de Cancer (PQRT/INCA), Rio de Janeiro, RJ (Brazil). Programa de Qualidade em Radioterapia

    2014-07-01

    The objective of this work is to submit radiochromic films, thermoluminescent dosimeters and ionization chamber to identical situations irradiation, in order to assess their capabilities in measuring peripheral doses. The growing number of survivors of childhood cancer has created the need to investigate the cause of the sequelae of treatment. Measurements of peripheral radiation to the radiotherapy target region increment the knowledge of the subject and assist in the development of protection methods. As the periphery of the radiation spectrum is different from that in the beam, the energy independence supposedly provided in radiochromic films can overcome the energy dependence found of ionization and TLD chambers, in order to discard the necessity of correction of the values if films are used. In this work the three dosimeters were exposed to doses arising from the issuance of 6 MV beams, field 10 cm x 10 cm and 500 UM. The dosimeters were placed at 0, 10, 17.5 and 30 cm from the central ray, always under 5 cm of water. The results showed that the figures reported by the films have high average standard deviation and for more conclusive results is necessary to proceed with the radiations, employing more intense beams.

  5. Impacts of the CX neutrals on the Vacuum Vessel of TJ-II during NBI; Impactos de los Neutros de CX en la Camara de Vacio del TJ-II durante NBF

    Energy Technology Data Exchange (ETDEWEB)

    Guasp, J.

    1995-07-01

    A numerical analysis of the impact patterns on the Vacuum Vessel produced by CX neutrals during the tangential balanced NBI in TJ-II Helical Axis Stellarator has been done. The results show periodical distributions with smooth maxima and mild loads, concentrated preferential on the HC plates. A certain preference of these neutral to emerge down wards from the plasma appears, as a consequence of a similar trend for the trapped particles. The differences between the impacts produced by the beam parallel to the magnetic field and the opposite one are small, once more as a consequence of the loss of memory of trapped particles to initial direction. The dependence of loads with plasma density and beam energy follows the trend of CX losses, decreasing strongly with increasing density and decreasing, more smoothly, with energy. (Author) 3 refs.

  6. Ocean station data collected using bottle from the ALMIRANTE CAMARA and other platforms in the NE Atlantic (limit-40 W) and Others from 02 January 1983 to 11 November 1983 (NODC Accession 9000033)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Ocean station data were collected using seechi disk, meteorological sensors and bottle casts in the Northwest and Southwest Atlantic Ocean from 02 January 1983 to...

  7. Comparing of the yield curve of the pediatric X-ray equipment using thermoluminescent dosimeters and cylindrical ionization chamber; Comparacao da curva de rendimento de um aparelho de raios X pediatrico utilizando dosimetros termoluminescentes e camara de ionizacao cilindrica

    Energy Technology Data Exchange (ETDEWEB)

    Filipov, Danielle, E-mail: dfilipov@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Schelin, Hugo R., E-mail: ledesmaiorgealberto@gmail.com [Instituto de Pesquisa Pele Pequeno Principe, Curitiba, PR (Brazil); Tilly Junior, Joao G., E-mail: joao.tilly@derax.com.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil). Hospital de Clinicas

    2014-07-01

    The determination of the yield curve of a radiographic equipment should be realized once a year, or when the unit be serviced. Besides being a requirement of ANVISA, through this test is possible to determine the incident air kerma (at a given point in the center of the beam) - INAK. Based on these concepts, the main objective of this work is the comparison of yield curves of the pediatric X-ray apparatus using two different detectors: one cylindrical ionization chamber and thermoluminescent dosimeters type LiF: Mg, Cu, P, as per protocol RLA / 9/057 IAEA. Then the equation of the yield curve (generated by each detector) was used to determine the INAK of 10 pediatric examinations, performed on this equipment. After the process of calibration of both detectors, they were placed side by side at a focus of the tube equipment for determining the performance of the same curve. Finally, using the curves generated by two detectors, INAK values of the 10 tests were calculated (from the kVp values, and mAs focus-patient of each exams), generating difference values at most 5%. As a conclusion, it can be said that the TLD lithium fluoride doped with Mg, Cu and P and the cylindrical ionization chambers may be used satisfactorily to determine the yield curve, whether as quality control or dosimetry.

  8. Q A IMRT comparison specific patient by means of radiochromic films, radiographic films and ionization chambers arrangement; Comparacion de QA IMRT paciente especifico mediante films radiocromicos, films radiograficos y arreglo de camaras de ionizacion

    Energy Technology Data Exchange (ETDEWEB)

    Medina, L.; Venencia, D.; Garrigo, E., E-mail: fisicamedina11@gmail.com [Instituto Privado de Radioterapia, Obispo Oro 423, X5000BFI Cordoba (Argentina)

    2014-08-15

    IMRT uses radiation beams of nonuniform intensity. Quality assurance (Q A) specific patient is mandatory in this treatment modality. The purpose of this study is to compare results of patient specific Q A IMRT dose distributions of the total plan and individual fields using different dosimetric systems. We used a photon beam 6 MV generated for linear accelerator PRIMUS, were used planning systems iPLAN and Konrad for IMRT inverse planning with modality Step and Shoot. For plans total dose distributions were measured with radiographic films EDR2 and Radiochromic Film EBT3. For individual fields the dose distributions were measured with radiographic films X-Omat-V, Radiochromic Film EBT3 and PTW 2D-Array. We used a scanner VIDAR Dosimetry Pro Red and software Rit v6.1 for analysis, was used Gamma index [Γ] for comparison of measured and calculated dose recording the number of pixels with Γ> 1. We analyzed 50 plan dose distributions total 50 individual fields. For the total plan the number of pixels with Γ>1 (3%-3m m) was 0.7%±1.2 [0.1%; 2.82%] for EBT3 y 1%±1.8 [0.2%; 3%] for EDR2. For individual fields (5%-3m m) was obtained 0.97%±1,7 [0%, 3%] for X-Omat-V, 0.84%±1.1[0.3%,3.1%] for EBT3 and 2.6%±1.9 [0.01%,6.8%] PTW 2D-Array. All three methods can be used. Radiochromic Films revealed the advantage and disadvantage of the cost. Both systems are slightly better film to PTW 2D-Array. (author)

  9. Estimation of absorbed dose with CBCT in studies of prostate measured with TLD's pen and camera; Estimacion de dosis absorbida con CBCT en estuidos de prostata medida con camara lapiz y TLDs

    Energy Technology Data Exchange (ETDEWEB)

    Alonso Iracheta, L.; Capuz Suarez, B.; Cordoba Gomez, D.; Gomez Martin, C.; Miravilla Limorte, M.; Bejar Navarro, M. J.; Colmenares fernandez, R.; Moris Pablos, R.; Rot Sanjuan, M. J.

    2011-07-01

    The Cone Beam CT (CBCT) is an imaging system composed of an X-ray tube facing a flat panel built into the gas detection. Allows for Image Guided Radiation Therapy 3D (3D IGRT) by volumetric reconstructions of the patient in the treatment unit and overlay them with the reference CT to verify and / or correct the position of the tumor and / or organs at risk in the area treatment.

  10. François Lefeuvre (éd.), Guy-Marie Riobé, Helder Camara, Ruptures et fidélités d'hier et d'aujourd'hui

    OpenAIRE

    Gruson, Pascale

    2012-01-01

    En 2009, Le Vatican décidait de lever l'excommunication frappant quatre prêtres de la Fraternité Saint-Pie X ; les engagements passés et présents de ces derniers restaient pourtant troubles et leurs opinions affichées, notamment à l'égard du judaïsme, plutôt inquiétantes. D'une manière quasi simultanée, une fillette brésilienne et sa famille étaient excommuniées, au prétexte qu'un avortement avait été pratiqué sur l'enfant, victime d'un viol. Ces gestes d'autorité auxquels s'ajoutent, la cond...

  11. Study of energy dependence of a extrapolation chamber in low energy X-rays beams; Estudo da dependencia energetica de uma camara de extrapolacao em feixes de raios-X de baixa energia

    Energy Technology Data Exchange (ETDEWEB)

    Bastos, Fernanda M.; Silva, Teogenes A. da, E-mail: fernanda_mbastos@yahoo.com.br, E-mail: silvata@cdtn.br [Centro de Desenvolvimeto da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2014-07-01

    This work was with the main objective to study the energy dependence of extrapolation chamber in low energy X-rays to determine the value of the uncertainty associated with the variation of the incident radiation energy in the measures in which it is used. For studying the dependence of energy, were conducted comparative ionization current measurements between the extrapolation chamber and two ionization chambers: a chamber mammography, RC6M model, Radcal with energy dependence less than 5% and a 2575 model radioprotection chamber NE Technology; both chambers have very thin windows, allowing its application in low power beams. Measurements were made at four different depths of 1.0 to 4.0 mm extrapolation chamber, 1.0 mm interval, for each reference radiation. The study showed that there is a variable energy dependence on the volume of the extrapolation chamber. In other analysis, it is concluded that the energy dependence of extrapolation chamber becomes smaller when using the slope of the ionization current versus depth for the different radiation reference; this shows that the extrapolation technique, used for the absorbed dose calculation, reduces the uncertainty associated with the influence of the response variation with energy radiation.

  12. Determination of the air attenuation and electronic loss for the free air concentric cylinders ionization chamber; Determinacao da atenuacao do ar e perda eletronica para a camara de ionizacao de ar livre de cilindros concentricos

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Hebert Pinto Silveira de

    2010-07-01

    Along the latest years, the LNMRI has been proceeding a continuous research work with a concentric cylinders type free air ionizing chamber (VICTOREEN, model 481), aiming to establish it as a new national standard, and, as a consequence, replace the worldwide accepted secondary standard, calibrated by PTB. Taking into account that the absolute determination of kerma in air with a free air ionizing chamber implies the acquirement of a number of correction factors. The main objective of the present work comprises the determination of the two factors, specifically, electronic loss (k{sub e}) and air attenuation (k{sub a}). The correction factors were obtained through mammography qualities reference spectrum, using Monte Carlo simulation method. The Penelope code was used in the simulation procedures. Simulations took place in two stages, the acquirement of specters related to the qualities of interest (mammography) with the x ray tube (Pantak, model HF160 e Panalytical, model XRF window), and the free-air ionization chamber. The data were compared to those related to the BIPM chamber, to electronic loss were not detected. The comparison between air attenuation factors was obtained data bellow 0.13%. (author)

  13. Use of calibration methodology of gamma cameras for the workers surveillance using a thyroid simulator; Uso de una metodologia de calibracion de camaras gamma para la vigilancia de trabajadores usando un simulador de tiroides

    Energy Technology Data Exchange (ETDEWEB)

    Alfaro, M.; Molina, G.; Vazquez, R.; Garcia, O., E-mail: mercedes.alfaro@inin.gob.m [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2010-09-15

    In Mexico there are a significant number of nuclear medicine centers in operation. For what the accidents risk related to the transport and manipulation of open sources used in nuclear medicine can exist. The National Institute of Nuclear Research (ININ) has as objective to establish a simple and feasible methodology for the workers surveillance related with the field of the nuclear medicine. This radiological surveillance can also be applied to the public in the event of a radiological accident. To achieve this it intends to use the available equipment s in the nuclear medicine centers, together with the neck-thyroid simulators elaborated by the ININ to calibrate the gamma cameras. The gamma cameras have among their component elements that conform spectrometric systems like the employees in the evaluation of the internal incorporation for direct measurements, reason why, besides their use for diagnostic for image, they can be calibrated with anthropomorphic simulators and also with punctual sources for the quantification of the radionuclides activity distributed homogeneously in the human body, or located in specific organs. Inside the project IAEA-ARCAL-RLA/9/049-LXXVIII -Procedures harmonization of internal dosimetry- where 9 countries intervened (Argentina, Brazil, Colombia, Cuba, Chile, Mexico, Peru, Uruguay and Spain). It was developed a protocol of cameras gamma calibration for the determination in vivo of radionuclides. The protocol is the base to establish and integrated network in Latin America to attend in response to emergencies, using nuclear medicine centers of public hospitals of the region. The objective is to achieve the appropriate radiological protection of the workers, essential for the sure and acceptable radiation use, the radioactive materials and the nuclear energy. (Author)

  14. Evaluation of the energy dependence of ionization chambers pencil type calibrated beam tomography standards; Avaliacao da dependencia energetica de camaras de ionizacao do tipo lapis calibradas em feixes padroes de tomografia

    Energy Technology Data Exchange (ETDEWEB)

    Fontes, Ladyjane Pereira; Potiens, Maria da Penha A., E-mail: lpfontes@ipen.br [Instituto de Pesquisas Energeticas e Nucleres (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    The Instrument Calibration Laboratory of IPEN (LCI - IPEN) performs calibrations of pencil-type ionization chambers (IC) used in measures of dosimetric survey on clinical systems of Computed Tomography (CT). Many users make mistakes when using a calibrated ionization chamber in their CT dosimetry systems. In this work a methodology for determination of factors of correction for quality (Kq) through the calibration curve that is specific for each ionization chamber was established. Furthermore, it was possible to demonstrate the energy dependence on an pencil-type Ionization Chamber(IC) calibrated at the LCI - IPEN. (author)

  15. Regression models in the determination of the absorbed dose with extrapolation chamber for ophthalmological applicators; Modelos de regresion en la determinacion de la dosis absorbida con camara de extrapolacion para aplicadores oftalmologicos

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez R, J.T.; Morales P, R

    1992-06-15

    The absorbed dose for equivalent soft tissue is determined,it is imparted by ophthalmologic applicators, ({sup 90} Sr/{sup 90} Y, 1850 MBq) using an extrapolation chamber of variable electrodes; when estimating the slope of the extrapolation curve using a simple lineal regression model is observed that the dose values are underestimated from 17.7 percent up to a 20.4 percent in relation to the estimate of this dose by means of a regression model polynomial two grade, at the same time are observed an improvement in the standard error for the quadratic model until in 50%. Finally the global uncertainty of the dose is presented, taking into account the reproducibility of the experimental arrangement. As conclusion it can infers that in experimental arrangements where the source is to contact with the extrapolation chamber, it was recommended to substitute the lineal regression model by the quadratic regression model, in the determination of the slope of the extrapolation curve, for more exact and accurate measurements of the absorbed dose. (Author)

  16. Quality Control Procedures Applied to the CMS Muon Chambers Built at CIEMAT; Procedimientos de Control de Calildad de las Camaras de Muones del Experimento CMS Construidas en el CIEMAT

    Energy Technology Data Exchange (ETDEWEB)

    Fouz, M. C.; Puerta Pelayo, J.

    2004-07-01

    In this document the quality control procedures applied to the CMS muon drift chmabers built at CIEMAT are described. It includes a description of the high voltage and front electronics associated to the chambers. Every procedure is described with detail and a list of the more common problems and possible solutions is given. This document can be considered as a chambert test handbook for beginners. (Author) 3 refs.

  17. Establishment of a primary standard system for low energy X-rays using a free air ionization chamber; Estabelecimento de um sistema padrao primario para raios-X de energias baixas com uma camara de ionizacao de ar livre

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Natalia Fiorini da

    2016-08-01

    In this work a primary standard system was established for low energy X-rays (10 kV to 50 kV), using a free air ionization chamber with concentric cylinders, Victoreen (Model 481-5), at the Calibration Laboratory of Instruments (LCI) of the Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP). For this, a new ionization chamber alignment protocol was developed for the radiation system and a modification on the micrometer housing used for the movement of the internal cylinders was ma de. The results obtained for the stability and characterization tests showed to be within the limits established by the standards IEC 61674 and IEC 60731. The correction factors for photon attenuation in the air, transmission and scattering in the diaphragm, scattering and fluorescence and ion recombination were also determined. These values were compared with those obtained by the German primary standard laboratory, Physikalisch-Technische Bundesanstalt (PTB), showing good agreement. Finally, the absolute values of the quantity air kerma rate for the standard qualities direct beams MWV28 and WMV35 and the attenuated beams WMH28 and WMH35 were determined; the results are in agreement, with a maximum difference of 3,8% with the values obtained using the secondary standard system of LCI. (author)

  18. Proposal of a calibration protocol of gamma chambers for estimation of the radionuclides incorporation in emergency situations; Propuesta de un protocolo de calibracion de camaras gamma para estimacion de la incorporacion de radionucleidos en situaciones de emergencia

    Energy Technology Data Exchange (ETDEWEB)

    Dantas, B.M.; Lucena, E.; Dantas, A.L.A.; Araujo, F.; Melo, D. [Instituto de Radioprotecao e Dosimetria, Rio de Janeiro Brasil (Brazil); Teran, M.; Paolino, A. [Facultad de Quimica, Montevideo (Uruguay); Hermida, J.C. [Hospital de Clinicas, Facultad de Medicina, Montevideo (Uruguay); Rojo, A. [Autoridad Regulatoria Nuclear, Buenos Aires (Argentina); Puerta, J.A.; Morales, J. [Universidad Nacional de Colombia, Medellin (Colombia); Lopez B, G.M. [Centro de Proteccion e Higiene de las Radiaciones, Ciudad de la Habana (Cuba); Alfaro, M.; Ruiz, M.A. [Instituto Nacional de Investigaciones Nucleares (Mexico); Videla, R.; Pinones, O. [Comision Chilena de Energia Nuclear, Santiago (Chile); Gonzalez, S. [Instituto Peruano de Energia Nuclear, Lima (Peru); Navarro, T. [Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, Madrid (Spain); Cruz S, R. [International Atomic Energy Agency, Vienna (Australia)

    2006-07-01

    In the last years in several countries has come increasing the concern with the possibility of accidents related to the transport and manipulation of open sources used in nuclear medicine. This carried out to the search of alternative methods for the monitoring of workers and individuals of the public exposed to the radionuclides incorporation like {sup 131} I, {sup 201} Tl, {sup 153} Sm among others. One of the options to assist the demand for monitoring of the radionuclides incorporation is the use of gamma chambers that are medical diagnostic equipment available in the own centers of nuclear medicine. The gamma chambers are used to obtain images of patient to which are administered a radionuclide of well-known activity with diagnostic purposes. These equipment have among its components elements that spectrometric systems like those used in the evaluation of the internal incorporation for direct measurements, reason why besides its use for diagnosis by image they can be gauged with anthropomorphic simulators and also with punctual sources for the quantification of the radionuclides activity, distributed homogeneously in the human body or located in specific organs. This work presents the development of a calibration protocol of gamma chambers for the in vivo determination of radionuclides and it proposes the implementation of the protocol in centers of nuclear medicine of the 9 countries participants of the project OAS-ARCAL-RLA/9/049-LXXVIII - Harmonization of procedures of internal dosimetry (Argentina, Brazil, Colombia, Cuba, Chile, Mexico, Peru, Uruguay and Spain). The protocol is the base to establish an integrated net to attend in the response to emergencies using nuclear medicine centers of public hospitals of the region. The proposal is an additional alternative for the monitoring of people in emergency situations where it is possible and feasible the use of the gamma chambers. This would avoid the person's transport with incorporation suspicion for a conventional whole-body counter when there was a near nuclear medicine center to the place where it happened the accident, diminishing the response time and economizing costs for the implementation of the necessary countermeasures. (Author)

  19. Comparison between Electronic Portal Imaging Devices and ion chamber matrix for intensity-modulated radiotherapy quality assurance; Comparacao entre Dispositivos Eletronicos de Imagens Portais e matriz de camaras de ionizacao para garantia da qualidade de radioterapia de intensidade modulada

    Energy Technology Data Exchange (ETDEWEB)

    Silveira, Thiago B.; Rosa, Luiz A.R., E-mail: thiago.fisimed@gmail.com [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Lima, Marilia B., E-mail: thiago.fisimed@gmail.com [Instituto Nacional do Cancer (INCA), Rio de Janeiro, RJ (Brazil). Departamento de Fisica Medica

    2012-08-15

    The treatment with intensity-modulated radiotherapy (IMRT) demands an individual and specific quality assurance procedure. The use of ion chamber matrix is a well establish method to dose distribution verifications, despite the lower spatial resolution. An alternative method arising is the use of the Electronic Portal Imaging Devices (EPIDs). The aim of this paper is to validate the EPID use for quality assurance of IMRT comparing it to the previous method employing an ion chamber matrix. We analyzed 10 treatment planning for different tumor sites and photons energies of the linac Trilogy (Varian Medical Systems). We used Sliding-window IMRT and the measurements were acquired in EPID and in Physikalisch-Technische Werkstaetten (PTW) 2D Array seven29. Two different software were used to analyze the data: Verisoft version 4.0, for Array data; and Eclipse 8.6 with Portal Dosimetry for EPID data. The evaluation of concordance levels between measured and predicted images used the Gamma Index tool with 3% of dose difference and 3 mm of distance to agreement. The EPID showed worse results for approval percentiles, in average 2.17%, and bigger values of average gamma index, although its analysis confirmed the approvals of all planning. This happens because of the better sensitivity generated by the higher spatial resolution of the EPID, 0,784 mm against 1,0 cm of the Array, so it has bigger capacity to identify small dose variations. The EPID, jointly with the Portal Dosimetry, proved to be excellent tools to perform pre-treatment IMRT verifications, providing significant gain in dose distribution analysis. Also, the EPID is easier for positioning, for images manipulation, for data acquisition and analysis and has detection area 60% bigger. (author)

  20. Monitoring of the internal contamination of occupationally exposure personnel in services of nuclear medicine through the use of gamma cameras; Monitoreo de la contaminacion interna de personal ocupacionalmente expuesto en servicios de medicina nuclear mediante el uso de gamma camaras

    Energy Technology Data Exchange (ETDEWEB)

    Teran, M.; Paolino, A.; Savio, E. [Catedra de Radioquimica, Facultad de Quimica, Montevideo (Uruguay); Hermida, J.C. [Centro de Medicina Nuclear, Hospital de Clinicas, Facultad de Medicina, Montevideo (Uruguay); Dantas, B.M. [Laboratorio de Medidas In vivo, Instituto da Radioprotecao e Dosimetria, Rio de Janeiro (Brazil)

    2006-07-01

    The radionuclides incorporation can happen as a result of diverse activities; these include the work associated with the different stadiums of the nuclear fuel cycle, the use of radioactive sources in medicine, the scientific research, the agriculture and the industry. In Uruguay the main activities linked to the manipulation of open sources correspond those of Nuclear Medicine and from 2004, in the mark of the Project Arcal RLA 049 and being based on the Safety Guides of the IAEA it is implementing a program of internal monitoring in combined form the Nuclear Medicine Center of the Hospital of and the Radiochemistry class of the Faculty of Chemistry. In accordance with the publication of the ICRP 75 the emphasis of any monitoring program should be in the formal study of the doses in the workers to who are considered commendable of to receive in routine form an outstanding fraction of the dose limits or who work in areas where the exposures can be significant in the accident event. From April 2004, to the date has started a pilot plan by means of in that were established appropriate conditions of procedures and of safety in a reduced group of workers of the Nuclear Medicine area. In that period the first work limits, equipment adjustment, calibrations and registration systems were determined. The monitoring system implemented until the moment is carried out with a thyroid caption equipment. However these measurements are carried out in the university hospital embracing 40% of the involved workers of our country, with the purpose of reaching the covering of the biggest quantity of occupationally exposed personnel of private clinics. Also it was developed a new work proposal that allows to have an alternative measure method, in the event of not having the equipment habitually used. Among the conclusions of this work are that for the before exposed are considered the measure conditions but appropriate the following ones: Gamma Camera without collimator; Measurement time: 15 minutes; Detector- source distance: 20 cm. Under the determined conditions is possible to maintain the monitoring service of workers using gamma cameras like alternative method before the lack of an equipment of thyroid caption, allowing a work continuity without stopping the monitoring and the possibility opens up of implementing this methodology in nuclear medicine clinics far from the university center. (Author)

  1. The renewable energy sources market: proposal for its development and implications in the Wholesale Market Administrator; O mercado de energia eletrica de fontes incentivadas: proposta para sua expansao e implicacoes na camara de comercializacao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Januario, Alexandra Cristina Vidal

    2007-07-01

    This work approaches the insertion of the renewable energy sources - SHP, biomass, wind and solar - in the Brazilian power trading environment, more specifically in wholesale market administrator. Although the legislation created the special consumer in 1998, the lack of definition in the renewable energy trading process hindered this market development during years. However, to consider a solution for this implementation, it is important to know the current rules that conduct the power trading, therefore, identifying the possibilities of adjustment. Since this is a current subject, some proposals had been presented by sector agents through the Public Hearing 33/05. In this work, these proposals are also analyzed, so the presented solution considers the advantages and disadvantages of what was discussed by the market agents. Finally, the simulation of the proposed solution indicates its implementation viability and allows a critical analysis of the renewable energy sources market and the trading rules of the wholesale market administrator. (author)

  2. Implementation of a laboratory for manufacture, repair and electric calibration of dosemeters based in ionization chambers utilized in radiotherapy; Implementacao de um laboratorio para manutencao, reparo e calibracao eletrica de dosimetros baseados em camaras de ionizacao, utilizados em radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Becker, P.H.B.; Peres, M.A.L.; Moreira, A.J.C.; Nette, H.P. [Instituto de Radioprotecao e Dosimetria. Av. Salvador Allende S/N. Barra de Tijuca CEP: 22780-160. Caixa Postal: 37750 Rio de Janeiro-RJ (Brazil)

    1998-12-31

    Manufacturers of ionization chamber dosimeters for radiotherapy maintain only sales representatives in Brazil with no servicing capability causing difficulties to customers/users to get broken equipment back into operation. Aiming to partially solve this problem, a laboratory for maintenance, repair and electrical calibration was started in 1995 with the support of a two year IAEA Technical Assistance Project (BRA/1/031). (Author)

  3. “PERCEPCIÓN DEL DOLOR DE PACIENTES EN FASE INICIAL DEL TRATAMIENTO DE ORTODONCIA, UTILIZANDO PRUEBAS TÉRMICAS Y ELÉCTRICAS”

    OpenAIRE

    Jiménez López, xóchilt Wendolyn

    2012-01-01

    Antecedentes: Las pruebas de vitalidad pulpar son procedimientos que forman parte del diagnóstico en odontología y sirven para orientar la presencia o no de vitalidad pulpar. Indiscutiblemente, para obtener un diagnóstico correcto se debe realizar una serie de pruebas y exámenes, sobre todo para localizar aquellos dientes que puedan presentar un umbral de dolor diferente (sensibilidad) y tenerlo en cuenta al momento de colocar aparatología fija en pacientes. Objetivo: Evalua...

  4. Resultados preliminares sobre la estimación de la edad de muerte a partir de la evaluación de la estructura interna de piezas dentales uniradiculares

    OpenAIRE

    Luna, Leandro

    2005-01-01

    Se ha documentado que existe una importante correlación negativa entre la edad biológica y las dimensiones de la cavidad pulpar de incisivos, caninos y premolares. Esto se debe a que la depositación de la dentina secundaria en la superficie de la cavidad pulpar continúa con tasas más o menos constantes durante toda la vida del individuo. También se identificaron correlaciones entre edad de muerte y el desarrollo de la retracción periodontal y de la transparencia radicular. De esta manera, ana...

  5. Aplicación de un antioxidante en dientes tratados con tetraciclinas y/o MTA.

    OpenAIRE

    Bermúdez Semprún, María Esther

    2014-01-01

    Una vez que el diente erupciona en la cavidad bucal, lo hace con una formación radicular incompleta, se denomina diente inmaduro o con ápice abierto. La patología pulpar, como secuela de caries o de lesión traumática puede interferir en la vitalidad pulpar, conllevando a una interrupción de la formación normal de la raíz y como consecuencia, una raíz de paredes delgadas y propensas a la fractura. A partir del 2001 se introdujo la revascularización, que tiene la capacidad de formar tejido ...

  6. Incappucciamento Indiretto con Mineral Trioxide Aggregate (Mta: Caso Clinico e Follow-up

    Directory of Open Access Journals (Sweden)

    Francesco Riccitiello

    2014-11-01

    Risultati e conclusioni: A causa di alcuni problemi di salute, la bambina è tornata dopo 6 mesi. È stata osservata la formazione di tessuto duro e il controllo rx mostrava una chiara evidenza di formazione radicolare. Abbiamo eseguito il restauro finale di 36 con materiali compositi. Al controllo dopo 6 mesi e 7 anni non risultano segni clinici e radiografici di patologia pulpare o radicolare. In conclusione, l’MTA sembra essere un materiale utilizzabile con successo per il mantenimento della vitalità pulpare. Inoltre offre un’ottima impermeabilità, anche nei casi in cui ha avuto luogo una perdita di integrità del materiale di otturazione provvisorio.

  7. Alterações nos fatores de competição da indústria calçadista exportadora devido à entrada de competidores asiáticos Changes in competitive factors in footwear export industry due to arrival Asian producers

    Directory of Open Access Journals (Sweden)

    Giancarlo Medeiros Pereira

    2010-01-01

    Full Text Available Este artigo apresenta uma análise das modificações observadas entre 1990 e 2008 nos fatores de competição vigentes na indústria calçadista do Vale do Rio dos Sinos voltada à exportação para grandes redes de varejo nos Estados Unidos. Essas alterações resultam das novas condições de competitividade que lhes foram impostas pela entrada de competidores asiáticos, principalmente chineses, no mercado. Foi utilizada a metodologia do estudo de caso exploratório qualitativo. As principais técnicas de pesquisa foram a entrevista semiestruturada e o grupo focado com gestores especialistas. Foram entrevistados gestores praticantes e especialistas acadêmicos com atividades nas empresas. Como resultado, observou-se que os atores do processo de produção para exportação de calçados aumentaram a importância das dimensões diversidade de modelos, qualidade, inovação, velocidade e flexibilidade de produto e reduziram a importância das dimensões volume de produção e preço de venda. As dimensões design, performance e pontualidade permaneceram inalteradas. A principal contribuição do artigo é desvelar elementos que permitam a formulação de hipóteses para estudos futuros, mais completos, acerca do impacto das alterações mercadológicas sobre fatores competitivos e estratégia de produção.The paper presents an analysis of the changes observed in competitive factors in the footwear industry aimed at the Brazilian-based export industry, due to the arrival of Asian producers, the Chinese in particular, in the market. The research method was a qualitative exploratory case study. The main research techniques were semi-structured interviews and focus groups. Managers, experts and academics involved in the companies participated. As a result, we discovered that the impact of these new producers has been to sharpen the following competitive dimensions: diversity of models, quality, innovation, speed of delivery and flexibility. The dimensions of volume and price declined in importance. The dimensions of design, performance and reliability of delivery remain unchanged. The paper's main contribution is to postulate a research hypothesis to be tested in a future survey dealing with competitive dimensions in the industry.

  8. The use of steel and lead shieldings in radiotherapy rooms and its comparison with respect to neutrons doses at patients; Comparacao de blindagens de aco e de chumbo usadas em salas de radioterapia quanto a dose devido a neutrons depositada em pacientes

    Energy Technology Data Exchange (ETDEWEB)

    Silva, M.G.; Rebello, W.F.; Andrade, E.R.; Medeiros, M.P.C.; Mendes, R.M.S.; Braga, K.L.; Gomes, R.G., E-mail: maglosilva15@gmail.com, E-mail: rebello@ime.eb.br, E-mail: fisica.dna@gmail.com, E-mail: eng.cavaliere@gmail.com, E-mail: raphaelmsm@gmail.com, E-mail: kelmo.lins@gmail.com, E-mail: ggrprojetos@gmail.com [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil); Santos, R.F.G., E-mail: raphaelfgsantos@gmail.com [Centro Universitario Anhanguera, Niteroi, RJ (Brazil). Departamento de Engenharia; Silva, Ademir X., E-mail: ademir@con.ufrj.br [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil)

    2015-07-01

    The NCRP Report No. 151, Structural Shielding Design and Evaluation for Megavoltage X- and Gamma-Ray Radiotherapy Facilities, considers, in shielding calculations for radiotherapy rooms, the use of lead and/or steel to be applied on bunker walls. The NCRP Report calculations were performed foreseeing a better protection of people outside the radiotherapy room. However, contribution of lead and steel to patient dose should be taken into account for radioprotection purposes. This work presents calculations performed by MCNPX code in analyzing the Ambient Dose Equivalent due to neutron, H*(10){sub n}, within a radiotherapy room, in the patients area, considering the use of additional shielding of 1 TVL of lead or 1 TVL of steel, positioned at the inner faces of walls and ceiling of a bunker. The head of the linear accelerator Varian 2100/2300 C/D was modeled working at 18MeV, with 5x5cm{sup 2}, 10x10cm{sup 2}, 20x20cm{sup 2}, 30x30cm{sup 2} and 40x40cm{sup 2} openings for jaws and MLC and operating in eight gantry's angles. This study shows that the use of lead generates an average value of H*(10){sub n} at patients area, 8.02% higher than the expected when using steel. Further studies should be performed based on experimental data for comparison with those from MCNPX simulation.

  9. Perdas na produção e qualidade do leite devido contagem de células somáticas no leite e estresse térmico de vacas da raça Holandesa em clima temperado

    Directory of Open Access Journals (Sweden)

    Agostinho Ludovico

    2015-10-01

    Full Text Available  O objetivo deste estudo foi avaliar a influencia da contagem de células somáticas (CCS no leite e o estresse térmico sobre a produção e composição do leite de vacas de um rebanho de produção comercial em região de clima temperado, durante o período de 2008 a 2012. Os dados do dia de controle leiteiro de 161±9 vacas Holandesas, totalizando 9650 ordenhas, foram fornecidos pela Associação Paranaense de Criadores de Bovinos da Raça Holandesa e analisados através de estatística descritiva, correlação, análise de variância e regressão. A produção média diária de leite foi de 31,78 kg/vaca, com diminuição de 29,31% quando o escore de contagem de células somáticas (ECS foi 9 e até 11% quando o Índice de Temperatura Equivalente (ITE foi 32 ou maior. Os teores de lactose decresceram a partir do ECS 0 até 9 e de gordura a partir de ECS 1 até 9, totalizando diminuição de 7,88 e 9,23%, respectivamente, quando o ECCS foi 9. Um efeito inverso foi observado em relação ao teor de proteína, o qual aumentou 3,6% com ECS 8, comparado com o ECS 0. A produção diária de sólidos totais iniciou perdas a partir do ECS 0 e totalizou perdas de 30,64% quando este foi 9. O aumento do ITE até 32 ou mais diminuiu a concentração de todos os componentes do leite, exceto de proteína, em valores de até 3,42% da concentração. Estes efeitos, somados a diminuição na produção diária de leite com este nível de ITE, totalizaram perdas de até 12,74% na produção de sólidos totais. Conclui-se que as perdas de produção e qualidade de leite com o aumento da CCS e ITE são significativas e podem justificar a adoção de medidas para prevenir infecções na glândula mamária e conforto de vacas leiteiras, mesmo em região de clima temperado.

  10. Hiperbilirrubinemia neonatal prolongada devido à associação entre síndrome de Gilbert e doença hemolítica por incompatibilidade RhD Persistent neonatal hyperbilirubinemia resulting from Gilbert's syndrome in association with RhD hemolytic disease

    OpenAIRE

    Fernando P. Facchini; Angela Maria de Assis

    2005-01-01

    OBJETIVO: Relatar associação infreqüente de patologia que cause aumento considerável de produção de bilirrubina e outra diminuição importante na sua excreção. DESCRIÇÃO: Mãe tercigesta, Rh negativo. Na primeira gestação, gerou recém-nascido normal, de termo, não tendo recebido imunoglobulina humana anti-RhD. A segunda gestação complicou-se por isoimunização Rh, dando à luz neonato de termo, o qual necessitou três exsanguinotransfusões e faleceu com 8 dias de vida. Na gestação atual, conseguiu...

  11. Determination of the equivalent doses due to the ingestion of radionuclides from the uranium and thorium series presents in drinking waters of the region of Santa Luzia, Paraiba state, Brazil; Determinacao das doses equivalentes devido a ingestao de radionuclideos das series do uranio e torio presentes em aguas de consumo do municipio de Santa Luzia, estado da Paraiba

    Energy Technology Data Exchange (ETDEWEB)

    Pastura, Valeria F. da S., E-mail: vpastura@cnen.gov.b [Comissao Nacional de Energia Nuclear (DRSN/CNEN), Rio de Janeiro, RJ (Brazil). Diretoria de Radioprotecao e Seguranca Nuclear. Coordenacao de Materias Primas e Minerais; Campos, Thomas F. da C.; Petta, Reinaldo A., E-mail: thomascampos@geologia.ufrn.b, E-mail: petta@geologia.ufrn.b [Universidade Federal do Rio Grande do Norte (LARANA/UFRN), Natal, RN (Brazil). Lab. de Radioatividade Natural

    2011-10-26

    This paper determined the original dose equivalents from radionuclides of uranium and thorium series in a drinking water of well which is supplied to the population of Santa Luzia, Paraiba state, Brazil. The collected waters are near to the mineralized phlegmatic bodies in rose quartz and amazonite feldspar. Radiometric measurements performed on the feldspar vein point out counting ratios surrounding 30000 cps and the analysis of collected samples of minerals presented tenors for the {sup 226}Ra and {sup 219}Pb varying from 0.50 to 2.30 Bq/sw. For determination of concentration of radionuclides U{sub Total}, {sup 226}Ra, {sup 228}Ra and {sup 219}Pb, found in the not desalinated, two methods were used, spectrophotometry with arsenazo and radiochemistry, both realized in the CNEN-LAPOC laboratories. For the calculation of dose equivalent it was taken into consideration the following parameters: the dose coefficients for incorporation by ingestion for public individuals with ages over 17 years (Norma CNEN-NN-3.01, Regulatory Position 3.01/011) and daily ingestion of 4 liters of water, which is over the recommended by the WHO of 2L/day - 1993. The obtained values were compared with the reference value for compromised dose equivalent established by WHO for evaluate the risk potential to the health of population, by ingestion. The radionuclide concentrations in the wells varies from 0.054 to 0.21 Bq/L, resulting dose equivalents of 3.94 x 10{sup -3} mSv/year and 0.17 mSv/year in the studied population

  12. Effect of continuous positive airway pressure on fluid absorption among patients with pleural effusion due to tuberculosis Efeito da pressão positiva nas vias aéreas sobre a absorção do derrame pleural em pacientes devido à tuberculose

    OpenAIRE

    Juliana F. Oliveira; Mello, Fernanda C. Q.; Rosana S. Rodrigues; Ana L. Boechat; Conde, Marcus B.; Sara L. S. Menezes

    2010-01-01

    BACKGROUND: Tuberculosis (TB) remains as an important public health problem worldwide. The most common type is pulmonary TB, and the most prevalent form of extra-pulmonary disease among HIV-negative patients is pleural disease. OBJECTIVE: The objective of the present study was to determine the effect of continuous positive airway pressure (CPAP) on fluid absorption among patients with pleural effusion due to TB. METHODS: Twenty patients were randomized into two groups. The interventional grou...

  13. Neuroschistosomiasis due to Schistosoma mansoni: a review of pathogenesis, clinical syndromes and diagnostic approaches Neuroesquistossomose devido a Schistosoma mansoni: revisão da patogênese, síndromes clínicas e manejo diagnóstico

    Directory of Open Access Journals (Sweden)

    Cristiana M. Nascimento-Carvalho

    2005-08-01

    Full Text Available Neuroschistosomiasis (NS is the second most common form of presentation of infection by the trematode, Schistosoma mansoni. Granulomatous inflammatory reaction occurs as a result of schistosome eggs being transmitted to spinal cord or brain via the vascular system, or by inadvertent adult worm migration to these organs. The two main clinical syndromes are spinal cord neuroschistosomiasis (acute or subacute myelopathy and localized cerebral or cerebellar neuroschistosomiasis (focal CNS impairment, seizures, increased intracranial pressure. Presumptive diagnosis of NS requires confirming the presence of S. mansoni infection by stool microscopy or rectal biopsy for trematode eggs, and serologic testing of blood and spinal fluid. The localized lesions are identified by signs and symptoms, and confirmed by imaging techniques (contrast myelography, CT and MRI. Algorithms are presented to allow a stepwise approach to diagnosis.Neuroesquistossomose (NS é a segunda forma mais freqüente de apresentação da infecção causada pelo trematódeo Schistosoma mansoni. A inflamação do tipo granulomatosa ocorre como resultado da presença de ovos do S. mansoni que atingiram a medula espinhal ou o encéfalo via o sistema vascular ou pela migração inadvertida de vermes adultos para estes órgãos. Duas síndromes clínicas principais podem ser identificadas: a mielopatia esquistossomótica (aguda ou subaguda e a neuroesquistossomose cerebral ou cerebelar localizada (comprometimento focal do Sistema Nervoso Central, convulsões, hipertensão intracraniana. O diagnóstico presumido da NS requer a confirmação da presença da infecção por exame microscópico de fezes ou pela biópsia retal em busca de ovos de trematódeo e testes sorológicos no sangue e no líquor. As lesões localizadas são identificadas por sinais e sintomas, e confirmadas por exames de imagem (mielografia contrastada, tomografia computadorizada e ressonância magnética. Algoritmos são apresentados para orientar uma avaliação diagnóstica seqüencial.

  14. Impacto da recusa de candidatos à doação de sangue devido aos critérios para prevenção da doença de Creutzfeldt-Jacob e sua variante Impact of deferral criteria on prevention of Creutzfeldt-Jakob disease and its variant among blood donors in São Paulo, Brazil

    Directory of Open Access Journals (Sweden)

    Cesar Almeida Neto

    2005-06-01

    Full Text Available A doença de Creutzfeldt-Jacob (CJD e sua variante (vCJD são doenças neurológicas fatais, degenerativas, com longo período de incubação. Recentemente, um possível caso de transmissão de vCJD por transfusão sangüínea foi descrito. A partir de 2001 adotamos critérios para recusa de candidatos baseados em dados da literatura, Portarias e Resoluções do Ministério da Saúde. Avaliamos retrospectivamente o porcentual de recusas anuais na triagem clínica de 1.015.587 candidatos à doação, referentes aos critérios relacionados a CJD e vCJD, de janeiro de 2001 a dezembro de 2004. Este porcentual correspondeu a 0,0049% em 2001, 0,0051% em 2002, 0,092% em 2003 e 0,098% em 2004, representando recusa definitiva de 726 (0,068% candidatos. A causa mais freqüente de recusa por CJD ou vCJD foi permanência no Reino Unido > 6 meses (259 recusas seguido de transplante de córnea (203 recusas e uso de hormônio do crescimento de origem humana (151 recusas. Embora o número de recusas relacionados a CJD e sua variante seja baixo em nossa Instituição, observamos um aumento gradativo anual, que provavelmente relaciona-se à adição de novos critérios. Diferentemente de outros países, estas recusas não afetaram nosso estoque de sangue e componentes. Com os dados obtidos, consideramos que, na nossa população, podemos manter o "Princípio da Precaução" sem causar prejuízo no fornecimento de sangue e componentes aos nossos pacientes.Creutzfeldt-Jakob disease (CJD and its variant (vCJD are degenerative and fatal neurological diseases with a long incubation period. Recent studies have described a potential association between vCJD and blood transmission. The aim of this study is to evaluate the impact of the deferral criteria for CJD and vCJD in our institution since their implementation in 2001. Based on scientific data, we have adopted deferral criteria for the prevention of CJD and vCJD through blood transfusion since 2001. Blood donors are deferred if they spent more than 6 months cumulatively in the United Kingdom from January 1, 1980 through December 31, 1996, 10 years cumulatively in France, Portugal, or the Irish Republic since 1980, received human pituitary-derived growth hormone or corneal transplants or had one or more blood relatives with familial CJD. The deferral rate concerning these criteria was retrospectively evaluated for all blood donation candidates from January 2001 to December 2004. A total of 1,015,587 pre-donation interviews were evaluated. The deferral rate for CJD and vCJD was 0.049% in 2001, 0.051% in 2002, 0.092% in 2003 and 0.098% in 2004, denoting a permanent deferral of 726 (0.068% blood donors. The most frequent deferral reasons for CJD and vCJD was spending more than 6 months cumulatively in the United Kingdom from 1980 to 1996 (0.025% followed by corneal transplants (0.019% and use of pituitary-derived human growth hormone (0.014%. The number of deferrals related to CJD and its variant was very low at our center. It is feasible to support the "Precautionary Principle" for CJD and vCJD at our center without jeopardizing blood supply.

  15. Neutron stimulated emission computed tomography applied to the assessment of calcium deposition due to the presence of microcalcifications associated with breast cancer; Tomografia computadorizada de emissao estimulada por neutrons aplicada para avaliar a deposicao de calcio devido a presenca de microcalcificacoes associadas ao cancer de mama

    Energy Technology Data Exchange (ETDEWEB)

    Viana, Rodrigo S.S.; Yoriyaz, Helio [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, (SP) (Brazil)

    2011-07-01

    In this paper we presented an application of the Neutron Stimulated Emission Computed Tomography (NSECT), which uses a thin beam of fast neutrons to stimulate stable nuclei in a sample, emitting characteristic gamma radiation. The photon energy is unique and it is used to identify the emitting nuclei. This technique was applied for evaluating the calcium isotopic composition changing due to the development of breast microcalcifications. A particular situation was simulated in which clustered microcalcifications were modeled with diameters less than 1.40 mm. In this case, neutron beam breast spectroscopy was successful in detecting the counting changes in the photon emission spectra for energies, which are characteristics of 4{sup 0C}a isotope in a low deposited dose rate. (author)

  16. O impacto na cultura organizacional devido a implantação da tecnologia da informação: um estudo de caso em um hospital filantrópico / Impact on organizational culture due to deployment of information technology: a case study in a charity hospital

    Directory of Open Access Journals (Sweden)

    Henrique César Melo Ribeiro

    2013-08-01

    Full Text Available Cada vez mais a Tecnologia da Informação está tendo um papel de importância na estratégia da organização, impactando também em sua cultura. Uma organização para conseguir obter diferencial, tem que está integrada e alinhada com seus processos e a TI vem proporcionando e facilitando tal vinculo. Entende-se que a TI é uma ferramenta que traz diferencial e que a cultura é difícil de ser moldada. O objetivo deste artigo foi estudar o impacto na cultural organizacional pela introdução da tecnologia de informação em um hospital filantrópico. Foi uma pesquisa tipo exploratória, de campo, qualitativa e quantitativa, sendo adotada a técnica de estudo de caso. A coleta dos dados foi feita por meio de questionários fechados. Conclui-se que o Hospital Filantrópico estudado, mantinha-se com um certo conservadorismo em sua cultura e que há sete anos foi sendo adotada tecnologias de ponta no Hospital, impactando diretamente em sua cultura da organização.

  17. Internação devido a infecção pelo vírus sincicial respiratório em pacientes menores de 2 anos com doença cardíaca congênita hemodinamicamente significativa

    OpenAIRE

    Silvia Andres; Gabriela Bauer; Susana Rodríguez; Luis Novali; Diego Micheli; Diana Fariña

    2012-01-01

    OBJETIVO: Descrever taxas de hospitalização, carga de doença e fatores de risco associados a infecções agudas respiratórias (IRAs), especialmente aquelas causadas pelo vírus sincicial respiratório (VSR) e as causadas por outros vírus, em uma coorte de pacientes menores de 2 anos com doença cardíaca congênita (DCC). MÉTODOS: Um estudo de coorte observacional e prospectivo foi realizado com pacientes com DCC que receberam alta da unidade neonatal e foram acompanhados em um centro de referência....

  18. Internação devido a infecção pelo vírus sincicial respiratório em pacientes menores de 2 anos com doença cardíaca congênita hemodinamicamente significativa

    Directory of Open Access Journals (Sweden)

    Silvia Andres

    2012-06-01

    Full Text Available OBJETIVO: Descrever taxas de hospitalização, carga de doença e fatores de risco associados a infecções agudas respiratórias (IRAs, especialmente aquelas causadas pelo vírus sincicial respiratório (VSR e as causadas por outros vírus, em uma coorte de pacientes menores de 2 anos com doença cardíaca congênita (DCC. MÉTODOS: Um estudo de coorte observacional e prospectivo foi realizado com pacientes com DCC que receberam alta da unidade neonatal e foram acompanhados em um centro de referência. Foram registradas variáveis demográficas, tipo de DCC e necessidades médicas. O desfecho primário foi a internação por IRA (em valores totais e referentes apenas à infecção pelo VSR e por outras causas, e o secundário a carga da doença em pacientes hospitalizados. As taxas de internação foram calculadas considerando os valores totais de IRA e também os referentes apenas à IRA pelo VSR. Também foi calculada a densidade de incidência. RESULTADOS: Foram incluídos 71 pacientes com peso de nascimento de 3.043±720 g (média ± DP; 74% necessitaram de cirurgia e 8,4% faleceram em decorrência da DCC. No total, 22/71 pacientes foram hospitalizados por IRA (31%; IC95% 20-43, 15 deles pelo VSR (21%; IC95% 12-32, e ocorreram 1,35 episódios de internação por IRA/1.000 dias de seguimento (0,92 episódios de internação por IRA causada pelo VRS/1.000 dias. Quarenta por cento dos pacientes com IRA causada pelo VSR necessitaram de admissão em UTI pediátrica, e 30% necessitaram de VM versus nenhum nos casos de IRA por outros vírus. CONCLUSÕES: Na população estudada, a internação por IRA era comum, sendo o VSR a causa mais frequente. A carga da doença associada à IRA pelo VSR foi considerável, embora nenhum paciente tivesse falecido em decorrência da IRA. Com exceção da pouca idade, nenhum outro fator de risco biológico ou social esteve associado à internação por IRA causada pelo VSR.

  19. Automutilação devido à compressão da cauda eqüina em três cães e um gato Self-mutilation in three dogs and one cat with cauda equina compression

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    Cynthia Mary Gomes Lagedo

    1999-03-01

    Full Text Available O presente trabalho relata a ocorrência de dermatite prurítica acral e automutilação da cauda e região genitocrural em três cães e um gato que sofriam compressão de raízes nervosas da cauda eqüina. O diagnóstico foi realizado através dos sinais clínicos e por meio de exames radiográficos. O tratamento consistiu na descompressão cirúrgica da cauda eqüina, através de laminectomia dorsal, conseguindo-se com A mesmA, a remissão total das automutilações e perseguições da cauda, com cicatrização das lesões auto-infligidas.This paper describes the occurrence of acral pruritic dermatitis and self-mutilation of the tail, hindlimbs and genitalia areas in three dogs and one cat with compression of the cauda equina nerve roots. The diagnostic was carried out by clinical signs and radiological studies. The treatment was based upon the surgical decompression of the cauda equina by the dorsal laminectomy. The surgical treatment led to the total remission of the self-mutilation, tail persecution and the self-inflicted lesions.

  20. Hiperbilirrubinemia neonatal prolongada devido à associação entre síndrome de Gilbert e doença hemolítica por incompatibilidade RhD Persistent neonatal hyperbilirubinemia resulting from Gilbert's syndrome in association with RhD hemolytic disease

    Directory of Open Access Journals (Sweden)

    Fernando P. Facchini

    2005-10-01

    Full Text Available OBJETIVO: Relatar associação infreqüente de patologia que cause aumento considerável de produção de bilirrubina e outra diminuição importante na sua excreção. DESCRIÇÃO: Mãe tercigesta, Rh negativo. Na primeira gestação, gerou recém-nascido normal, de termo, não tendo recebido imunoglobulina humana anti-RhD. A segunda gestação complicou-se por isoimunização Rh, dando à luz neonato de termo, o qual necessitou três exsanguinotransfusões e faleceu com 8 dias de vida. Na gestação atual, conseguiu dar à luz a termo recém-nascido tipo ORh positivo, Coombs direto positivo, bilirrubina de cordão 6,5 mg/dl e hematócrito 44%. Com 5 horas de vida, estava ictérico, tendo sido iniciados fenobarbital (por 3 dias e fototerapia intensiva. A hiperbilirrubinemia foi logo controlada, porém ascendia rapidamente sempre que a fototerapia era suspensa. No 10° dia de vida, a criança foi transfundida por anemia importante. Em vista da persistência da icterícia, no 13° dia de vida pensou-se em associação com síndrome de Gilbert, e o seqüenciamento de DNA foi solicitado. O resultado mostrou genótipo mutante homozigoto UDPT1A1[TA]7TAA. Permaneceu em fototerapia até o 17° dia de vida. Recebeu alta no dia seguinte, após controle de bilirrubinemia. Voltou para acompanhamento ambulatorial e apresentou desenvolvimentos pondo-estatural e neurológico normais. COMENTÁRIOS: O caso ressalta a importância da associação do aumento de produção/diminuição de excreção de bilirrubina na gênese de hiperbilirrubinemias prolongadas, intensas e passíveis de causar kernicterus, se não tratadas vigorosamente. Demonstra, ainda, a eficácia da fototerapia intensiva, reduzindo os riscos de tratamentos mais agressivos. Ressalta, também, a importância do acompanhamento das icterícias neonatais até a completa remissão dos sintomas.OBJECTIVE: To report on an infrequent association of pathologies causing considerable increase in bilirubin production and a signifiant decrease in its excretion. DESCRIPTION: The third pregnancy of an RhD negative woman. Her first child was normal and delivered to term and did not receive Rhogam. The second pregnancy was problematic due to Rh isoimmunization. She delivered a child to term, who required three exchange transfusions, but died on the 8th day of life. The third child was delivered at term, ORh positive, direct Coombs positive and had stump bilirubin of 6.5 mg/dl and hematocrit at 44%. Five hours after birth the child was jaundiced. Phenobarbital and intensive phototherapy were introduced. Hyperbilirubinemia was soon controlled, but relapsed whenever phototherapy was discontinued. On the 10th day of life the child received a transfusion for significant anemia. As jaundice persisted to the 13th day, associated Gilbert syndrome was considered and DNA sequence analysis was requested. The test demonstrated a mutant homozygote genotype UDPT1A1[TA]7TAA. Phototherapy remained necessary until the 17th day of life and she was discharged from hospital the following day, after bilirubinemia had been controlled. She returned for follow-up and exhibited normal growth and neurological development. COMMENTS: This case demonstrates the significance of increased bilirubin production/decreased bilirubin excretion causing intense hyperbilirubinemias and, in the abnsence of vigorous treatment, kernicterus. The effectiveness of intense phototherapy has also been demonstrated, reducing the risks of more aggressive treatments such as exchange transfusion. It also provides evidence of the importance of bilirubinemia follow-up until complete resolution.

  1. Evaluation of pituitary and thyroid hormones in patients with subarachnoid hemorrhage due to ruptured intracranial aneurysm Avaliação dos hormônios hipofisários e tireoidianos em pacientes com hemorragia subaracnoidea devido a ruptura de aneurisma intracraniano

    Directory of Open Access Journals (Sweden)

    Paola Mangieri

    2003-03-01

    Full Text Available It is well known that the central nervous system (CNS influences the pituitary hormone secretions and that diseases of CNS are frequently associated with an altered endocrine function. The aim of this study has been the evaluation of the serum concentrations of the pituitary and thyroid hormones in a series of patients with subarachnoid hemorrhage due to a ruptured cerebral aneurysm. Thirty-five patients (23 females and 12 males, aged 51.9±13.3 years on the mean were admitted. They were evaluated to assess the clinical severity of the subarachnoid hemorrhage by Hunt & Hess scale: nine patients were in the grade I, 14 in the grade II, and 12 in the grade III. Blood samples were obtained between 8:00 and 9:00 a.m. and serum hormones were measured by commercial kits (IRMA or MEIA methods. Cortisol serum levels (normal range (NR = 5 to 18 µg/dL were increased in all the patients (mean ± standard deviation = 31.4±12.4 µg/dL. Mean prolactin levels (NR É bem conhecido que o sistema nervoso central (SNC influencia as secreções dos hormônios hipofisários e que doenças do SNC são frequentemene associadas com função endócrina alterada. O objetivo deste estudo foi avaliar as concentrações séricas dos hormônios hipofisários e tireoidianos em uma série de pacientes acometidos de hemorragia subaracnóidea devida a ruptura de aneurisma cerebral. Foram avaliados 35 pacientes (23 mulheres e 12 homens, com média de idade de 51,9±13,3 anos. Foram avaliados para a severidade da doença pela escala de Hunt & Hess: nove deles estavam no grau I, 14 no grau II e 12 no grau III. As amostras de sangue foram obtidas entre 8:00 e 9:00 horas e os hormônios foram medidos pelos métodos de IRMA ou de MEIA. Os níveis séricos de cortisol (valor normal (VN 5 a 18 µg/dl estavam aumentados em todos os pacientes (média±desvio padrão = 31,4±12,4 µg/dl. Os níveis de prolactina (VN <20 ng/ml foram de 18,6±17,1 ng/ml e cinco (14,2% tiveram níveis maiores do que o normal. Os níveis de FSH e LH foram normais de acordo com a idade e sexo: homens - FSH = 4,0±2,9 mUI/ml (VN =1 a 10,5 mUI/ml; LH = 6,1±6,3 mUI/ml (VN =2 a 12 mUI/ml; mulheres - pré-menopausa: FSH = 2,5±1,5 mUI/ml (VN =2,4 a 9,3 mUI/ml; LH 3,9±5,1 mUI/ml (VN =2 a 15 µUI/ml; pós-menopausa: FSH = 48,3±18,5 mUI/ml (valor normal =31 a 134 mUI/ml; LH = 29±13,8 mUI/ml (VN =16 a 64 mUI/ml. Os níveis de TSH foram 3,9±5,2 µUI/ml (VN =0,5 a 4,7 µUI/ml e cinco pacientes (14,2 % tiveram níveis maiores do que o normal. Os níveis de triiodotironina (T3 foram de 66,4±18,7 ng/dl (VN = 45 a 137 ng/dl e cinco pacientes (14,2% tiveram níveis menores do que o normal (33,8±9 ng/dl. Os níveis de tiroxina (T4 (VN= 4,5 a 12,5 µg/dl foram de 7,4±1,7 µg/dl e dois pacientes (5,6 % tiveram níveis menores do que o normal. Anticorpos antitireoglobulina e antimicrossomal não foram detectados. Conclusões: nas primeiras 24 horas seguindo o quadro ictal, as anormalidades observadas nas dosagens hormonais podem ser devidas ao estresse provocado pelo sangramento intracraniano; as alterações observadas nos hormônios tireoidianos sugerem que os pacientes com hemorragia subaracnoidea podem desenvolver a síndrome do doente eutireoideo.

  2. Quality of life is severely compromised in adult patients with atopic dermatitis in Brazil, especially due to mental components A qualidade de vida é muito comprometida em pacientes adultos com dermatite atópica no Brasil, especialmente devido a fatores emocionais

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    Silvana Coghi

    2007-01-01

    Full Text Available PURPOSE: to measure the quality of life (QoL, either by a specific dermatology or generic self applied questionnaire, in Atopic dermatitis adult Brazilian patients, looking for selected affected groups. METHODS: We studied the quality of life of 75 Brazilian ambulatory adults with atopic dermatitis using two types of self-answered instruments: a quality of life generic questionnaire (SF-36 and a 10-item Dermatology Life Quality Index (DLQI questionnaire. All patients had been treated for at least 6 months, and their disease status was determined by Eczema Area and Severity Index scores. RESULTS: Quality of life and disease control were found to be related but with low scores both in DLQI (r²=0.26 and in SF-36 (r²=0.20, but with greater correlation for SF-36 mental components. Using the 75% percentile distribution of SF36 mean score and the 75% value of disease severity score, we sorted patients into four groups: I, referring good QoL and mild atopic disease (14/75, II, referring bad QoL and with mild atopic disease (19/75, III referring good QoL despite severe atopic disease (5/75 and IV referring bad QoL and severe atopic disease (37/75; all groups presented similar age, education, family income and time of disease progression. There was a higher frequency of women in group II, but without sleep disturbance or increased pruritus, which was present in group IV, with intense itching and sleep disturbances. Analyzing the physical or mental components of the SF36 generic test, discrepant groups II and III presented higher differences related to the mental components of the test, which was also related to DLQI scores, with a similar distribution for the 2 groups and a higher relation to the mental component of the generic test. CONCLUSION: The quality of life is affected in adult atopic patients, both related to disease severity and also to mental components, but with diverse effects in patient subgroups. Our data show some components that may mask the exact relationship between QoL results and disease severity.OBJETIVOS: Medir a qualidade de vida (QoL, por questionários tanto genéricos como dermatológicos específicos, em pacientes adultos brasileiros com dermatite atópica, procurando por grupos afetados selecionados. MÉTODOS: Nós estudamos a qualidade de vida em 75 pacientes brasileiros adultos em tratamento ambulatorial de dermatite atópica, usando dois tipos de questionários de auto-resposta, previamente padronizados: um questionário genérico de qualidade de vida de 36 questões (SF-36 e um questionário de 10 questões para determinação do índice dermatológico de qualidade de vida (DLQI. Todos os pacientes estavam em tratamento por pelo menos seis meses e o seu estágio de doença clinico definido quantitativamente pelo índice padronizado de gravidade e áreas de eczema (EASI. RESULTADOS: A QoL e o controle da doença estavam relacionados mas com baixa relação tanto avaliados pelo DLQI (r²=0.26 ou pelo SF-36 (r²=0.20, mas com maiores relações com os componentes emocionais do SF-36. Usando a distribuição do percentil 75% para o SF36 e os valores de 75% do escore de gravidade clínica EASI, os pacientes foram distribuídos em quatro grupos: I que referia boa QoL e doença atópica leve (14/75, II referindo má QoL e doença atópica leve (19/75, III referindo boa QoL apesar de doença atópica mais grave (5/75 e IV concordando uma má QoL referida e uma doença atópica mais grave (37/75; todos os grupos apresentavam mesma distribuição etária, educação e nível social, renda familiar e tempo de doença. Havia uma maior freqüência de mulheres no grupo II, mas sem distúrbios de sono ou prurido intenso, fatores presentes intensamente no grupo IV. Dissecando os componentes físicos e emocionais do SF36, os grupos discrepantes II e II apresentavam maior diferença relativa aos componentes emocionais do teste, que também estavam relacionados aos valores do teste DLQI, o qual apresentava uma distribuição similar entre os grupos e maior relação aos componentes emocionais do teste genérico. CONCLUSÕES: A qualidade de vida é afetada em pacientes adultos com dermatite atópica, relacionada tanto com a gravidade da doença clinica como com os componentes emocionais, que são diferentes em subgrupos de pacientes. Estes dados mostram componentes que podem mascarar o exato impacto da severidade da doença sobre a qualidade de vida destes pacientes.

  3. Dicloroisocianurato in the prevention of the clogging due to the use of rusted waters in drip irrigationDicloroisocianurato na prevenção do entupimento devido ao uso de águas ferruginosas em sistemas de irrigação por gotejamento

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    Edvaldo Fialho dos Reis

    2012-04-01

    Full Text Available The objective of this work was to evaluate the performance of a drip irrigation system applying water with high concentration of total iron, and to evaluate the efficiency of organic chlorine to prevent emitters clogging. The system consisted of four subunits receiving the following of dichlorine treatments: (N1 = 0, N2 = 15, N3 = 30 and N4 = 45 mg L-1 of free chlorine. The uniformity of application of water was evaluated using the coefficients of uniformity of Christiansen (CUC and of Distribution (CUD, every 100 hours of use, for 700 hours, before and after the chlorination. Also the discharge coefficient variation (CVq was evaluated. In the subunit with N1 there was a reduction in the values of CUC and CUD of 8,2 and 15,2%, respectively. The chlorination with dichlorine of sodium in the dosages of 15, 30 and 45 mg L-1 prevents the blockage of the dripper.O objetivo deste trabalho foi avaliar o desempenho de um sistema de irrigação por gotejamento, aplicando água com elevado teor de ferro total e, ainda, avaliar a eficiência da cloração orgânica na prevenção do entupimento. O sistema de irrigação foi constituído de quatro subunidades de irrigação, que receberam os seguintes tratamentos com dicloro: (N1 = 0, N2 = 15, N3 = 30 e N4 = 45 mg L-1 de cloro livre. A uniformidade de aplicação de água do sistema foi avaliada utilizando os coeficientes de uniformidade de Christiansen (CUC e de Distribuição (CUD, a cada 100 horas de uso, durante 700 horas, antes e após a cloração. Também foi determinado o coeficiente de variação de vazão (CVq. Verificou-se uma redução nos valores do CUC e do CUD de 8,2 e 15,2%, respectivamente, na subunidade N1, refletindo no aumento do CVq. A cloração com dicloroisocianurato de sódio nas dosagens de 15, 30 e 45 mg L-1 previne o entupimento dos gotejadores.

  4. Repellent Activities of Essential Oils of Some Plants Used Traditionally to Control the Brown Ear Tick, Rhipicephalus appendiculatus

    NARCIS (Netherlands)

    Wanzala, W.W.; Hassanali, A.; Mukabana, W.R.; Takken, W.

    2014-01-01

    Essential oils of eight plants, selected after an ethnobotanical survey conducted in Bukusu community in Bungoma County, western Kenya (Tagetes minuta, Tithonia diversifolia, Juniperus procera, Solanecio mannii, Senna didymobotrya, Lantana camara, Securidaca longepedunculata, and Hoslundia opposita)

  5. DAMPAK APLIKASI EKSTRAK BEBERAPA JENIS MOL (MIKRO ORGANISME LOKAL) SEBAGAI INSEKTISIDA NABATI TERHADAP POPULASI HAMA UTAMA KEDELAI DAN MUSUH ALAMINYA

    OpenAIRE

    P.Saranga, Annie; Nurariaty Agus; Ahdin Gassa; Fatahuddin

    2013-01-01

    Penelitiandalambentukpercobaanbertujuanuntukmengetahuidampakaplikasiekstraktigajenistumbuhanyaknidaunnimba, buahMengkududandauntembelekan (L,camara) Masing-masingbahantumbuhandihaluskankemudiandifermentasi ( dibuat MOL) kemudiandibandingkandenganekstraktanpafermentasiuntukdijadikaninsektisidanabatiterhadappopulasihamautamakedelaidanmusuhalaminyatelahdilaksanakan di KebunPercobaanBalaiPenelitianSerealiaMarosdanlaboratorium Hama danPenyakitTumbuhanFakultasPertanianUniversitasHasanuddinmulai M...

  6. Procesos endoperiodontales. I Bases biológicas e interrelaciones

    OpenAIRE

    Brau Aguadé, Esteban; Canalda Sahli, Carlos

    2007-01-01

    Las relaciones endoperiodontales siguen siendo un tema de actualidad sujeto a controversia. Se analizan sus características macro y microscópicas así como la interrelación entre la patología pulpar y periodontal.

  7. Health, environmental, and economic costs from the use of a stabilized diesel/ethanol mixture in the city of São Paulo, Brazil Avaliação dos custos econômicos, ambientais e de saúde pública devido ao uso de mistura diesel/etanol estabilizada por um aditivo comercial na cidade de São Paulo, Brasil

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    Simone Georges El Khouri Miraglia

    2007-01-01

    Full Text Available In Greater Metropolitan São Paulo, Brazil, fossil fuel combustion in the transportation system is a major cause of outdoor air pollution. Air quality improvement requires additional policies and technological upgrades in fuels and vehicle engines. The current study thus simulated the environmental and social impacts resulting from the use of a stabilized diesel/ethanol mixture in the bus and truck fleet in Greater Metropolitan São Paulo. The evaluation showed reductions in air pollutants, mainly PM10, which would help avert a number of disease events and deaths, as estimated through dose-response functions of epidemiological studies on respiratory and cardiovascular diseases. Valuation of the impacts using an environmental cost-benefit analysis considered operational installation, job generation, potential carbon credits, and health costs, with an overall positive balance of US$ 2.851 million. Adding the estimated qualitative benefits to the quantitative ones, the project's benefits far outweigh the measured costs. Greater Metropolitan São Paulo would benefit from any form of biodiesel use, producing environmental, health and socioeconomic gains, the three pillars of sustainability.A poluição atmosférica na Região Metropolitana de São Paulo, Brasil, é devida principalmente à queima de combustíveis fósseis utilizados no sistema de transportes. A fim de melhorar a qualidade do ar, são necessárias políticas e melhorias tecnológicas em combustíveis e motores veiculares. Neste sentido, foi realizada uma avaliação dos impactos ambientais e sociais da mistura estabilizada do uso de diesel/etanol na frota de ônibus e caminhões na Região Metropolitana de São Paulo. Essa avaliação mostrou reduções nos poluentes atmosféricos, especialmente o MP10, o que contribuiu para um número de eventos de morbidade e mortalidade evitáveis estimados por meio de funções dose-resposta de estudos epidemiológicos em termos de doenças respiratórias e cardiovasculares. A valoração dos impactos representada através de uma análise custo-benefício ambiental resultou positiva em US$ 2,851 milhões. Adicionando-se a essa quantia os benefícios estimados em termos qualitativos, pode-se concluir que os benefícios sócio-econômicos do projeto superam os custos mensurados. A Região Metropolitana de São Paulo se beneficiará de qualquer tipo de biodiesel produzindo ganhos em termos ambientais, de saúde e de inclusão sócio-econômica, os três pilares da sustentabilidade.

  8. Use of MCNP to compare the response of dose deposited in the TLD 100, TLD 600 and TLD 700 in radiation fields due to {sup 60}Co and {sup 241}AmBe source; Uso do MCNP para comparacao das respostas de dose depositada nos TLD 100, TLD 600 e TLD 700 em campos de irradiacao devido a fontes de {sup 60}Co e {sup 241}AmBe

    Energy Technology Data Exchange (ETDEWEB)

    Cavalieri, Tassio A.; Castro, Vinicius A.; Siqueira, Paulo T.D., E-mail: tassio.cavalieri@usp.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2012-08-15

    The successes of Boron Neutron Capture Therapy (BNCT) depend on the ability to deliver an adequate irradiation field to the target cells. Neutron beams used in BNCT are mostly driven from reactors and therefore, not only have a neutron energy range which far exceeds the thermal region but also do have a great gamma component. Beam characterization and dosimetry are consequently one of the essential procedures to be overcome to properly apply this technique. One of the methods currently used in mixed field (field containing both neutron and gamma) characterization, lies on the use of a pair of detectors with distinct responses to each beam component. But this technique needs to be better understood of how each thermoluminescent dosimeter (TLD) behaves in a mixed field or in a pure field. This work presents the results of a set of simulations performed in order to analyze the response of three ordinary types of TLDs - TLD 100, TLD 600 and TLD 700 - submitted to different irradiation fields from a Cobalt source and an Americium-Beryllium source inside a paraffin disk. And is also a possible method for performing the selection and calibration of theses TLDs. (author)

  9. Estresse devido ao transporte e à ação da benzocaína em parâmetros hematológicos e população de parasitas em matrinxã, Brycon cephalus (Günther, 1869 (Osteichthyes, Characidae Transport with different benzocaine concentrations and its consequences on hematological parameters and gill parasite population of matrinxã Brycon cephalus (Günther, 1869 (Osteichthyes, Characidae

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    Maurício Laterça Martins

    2002-05-01

    Full Text Available O objetivo deste trabalho foi avaliar os efeitos do transporte, sob diferentes concentrações de benzocaína, em parâmetros hematológicos e na população de parasitas de brânquias do matrinxã Brycon cephalus (Osteichthyes, Characidae. Trinta peixes (peso médio 1,0 kg foram transportados em tambores plásticos de 200 L por quatro horas. Cada tambor foi preparado com uma concentração de benzocaína (B0 = 0 mg/L; B1 = 5 mg/L; B2 = 10 mg/L e B3 = 20 mg/L. Anteriormente ao carregamento dos tambores, cinco peixes foram amostrados para determinar a condição inicial. Outras três amostragens foram feitas posteriormente: na chegada, 24 e 96 horas após o transporte. Os peixes transportados sob efeito da benzocaína apresentaram menor resposta de fuga durante a captura comparado aos peixes do B0, sendo que os peixes do B3 mostraram dificuldade de manter o equilíbrio durante a viagem. Após o transporte, registraram-se os níveis mais elevados de cortisol plasmático, em todos os tratamentos, com retorno aos níveis iniciais após 24 horas. A glicemia elevou-se na chegada, em todos os tratamentos, e após 24 horas apenas os peixes transportados nas duas concentrações mais altas ainda não haviam recuperado os valores iniciais. Na chegada, a porcentagem de linfócitos decresceu, permanecendo neste patamar após 24 horas, sendo que os peixes do B2 e B3 não retornaram à condição inicial até o final do período experimental. Foi observado aumento da porcentagem de neutrófilos, desde a chegada até 24 horas após o transporte, em todos os tratamentos. Os peixes do B2 e B3 mantiveram elevadas as porcentagens de neutrófilos até 96 horas após o transporte. Na última coleta, constatou-se que o número do parasita branquial Piscinoodinium sp. havia aumentado nos peixes do B3. Foi possível observar que o uso da benzocaína contribuiu com a elevação da glicemia e dos níveis plasmáticos do cortisol após o transporte, sendo registrados efeitos negativos das duas concentrações mais altas em vários parâmetros hematológicos e no número de Piscinoodinium sp. aderido às brânquias. Concluiu-se, portanto que o uso da benzocaína não reduziu o estresse causado pelo transporte em matrinxãs, atuando inclusive como agente estressor adicional.The objective of this study was to evaluate the transport stressing effects and the different benzocaine concentrations on hematological parameters and parasite population of matrinxã Brycon cephalus (Osteichthyes, Characidae. Thirty fish (1.0 kg mean weight were hauled in four 200-L plastic tanks for four hours, at different benzocaine concentrations (B0 = 0.0 g/L, B1 = 5.0 g/L, B2 = 10.0 g/L and B3 = 20 g/L. Before loading, blood and gills of 5 fish were collected. Other three samplings were performed after transport, and 24 and 96 hours later (recovery period. Blood cortisol, glucose, hematocrit, white cell differential count and the number of the gill parasite Piscinoodinium sp. were determined. Plasma cortisol increased in all treatments after transport, returning to initial levels 24 hours later. Blood glucose was also elevated after transport in all treatments, but only B0 and B1 fish recovered initial levels in 24 hours. B2 and B3 fish did not recover the initial levels until the end of the experimental period. After transport, the lymphocytes relative percentage decreased and the neuthrophils relative percentage increased, in all treatments. Ninety-six hours later, only B0 and B1 fish had recovered the initial levels of these parameters. The number of Piscinoodinium sp. on the gills of B3 fish was higher than in the other treatments 96 hours after transportation. The use of benzocaine did not mitigate stress responses and some negative effects were observed in fish transported with the highest concentrations.

  10. Avaliação dos pacientes submetidos à descompressão e artrodese póstero-lateral devido à espondilolistese degenerativa com dois anos de acompanhamento Evaluación de los pacientes sometidos a descompresión y artrodesis posterolateral debido a la espondilolistesis degenerativa con dos años de seguimiento Evaluation of patients undergoing decompression and posterolateral arthrodesis because of degenerative spondylolisthesis with two years of follow up

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    Fernando William Figueiredo da Rosa

    2012-09-01

    Full Text Available OBJETIVO: Avaliar os resultados da descompressão e da artrodese póstero-lateral na espondilolistese degenerativa em pacientes que têm como sintoma principal a claudicação neurogênica. MÉTODO: Foram selecionados 21 pacientes com espondilolistese degenerativa, com indicação de tratamento cirúrgico. Foram avaliados 8 homens e 13 mulheres com idades entre 36 e 77 anos. O procedimento cirúrgico padronizado foi a artrodese póstero-lateral com instrumentação e descompressão associada. Os pacientes foram avaliados por VAS, índice de Oswestry e Roland-Morris no pré-operatório, com um mês, seis meses, um ano e dois anos de seguimento. Os dados foram analisados estatisticamente com nível de significância de 5%. RESULTADOS: O nível mais frequentemente operado foi L4-L5, com 52,38%. A VAS teve melhora significativa de 53,48% nos 6 meses após o procedimento. O Índice de Incapacidade de Oswestry apresentou piora no primeiro mês, evolução para melhora da capacidade até o sexto mês, e permaneceu constante até o fim do acompanhamento. Segundo o questionário de Incapacidade de Roland-Morris, houve melhora progressiva significativa até o sexto mês e, por último, uma leve piora. CONCLUSÃO: Os pacientes com espondilolistese degenerativa submetidos à artrodese póstero-lateral instrumentada e descompressão apresentaram melhora significativa da qualidade de vida e da dor após dois anos de acompanhamento.OBJETIVO: Evaluar los resultados de la descompresión y de la artrodesis posterolateral en la espondilolistesis degenerativa en pacientes que tienen, como síntoma principal, la claudicación neurogénica. MÉTODO: Se seleccionaron 21 pacientes con espondilolistesis degenerativa, con indicación de tratamiento quirúrgico. Se evaluaron 8 hombres y 13 mujeres, con edades de 36 a 77 años. El procedimiento quirúrgico estandarizado fue la artrodesis posterolateral con instrumentación y descompresión vinculada. Los pacientes fueron evaluados VAS, Índice de Oswestry y Roland-Morris en el preoperatorio, con seguimiento de un mes, seis meses, un año y dos años. Los datos fueron analizados, estadísticamente, con nivel de significación de 5%. RESULTADOS: El nivel operado más frecuentemente fue L4-L5, con 52,38%. El VAS tuvo mejoría significativa de 53,48% en los 6 meses posteriores al procedimiento. El Índice de Incapacidad de Oswestry presentó empeoramiento en el primer mes, evolución para mejoría de la capacidad hasta el sexto mes, y permaneció constante hasta el fin del acompañamiento. Según el cuestionario de Incapacidad de Roland-Morris, hubo mejoría progresiva significativa hasta el sexto mes y, por último, un leve empeoramiento. CONCLUSIÓN: Los pacientes con espondilolistesis degenerativa, sometidos a la artrodesis posterolateral instrumentada y a la descompresión, presentaron mejoría significativa de la calidad de vida y del dolor, aún después de dos años de acompañamiento.OBJECTIVE: To evaluate the decompression and posterolateral arthrodesis in degenerative spondylolisthesis in patients whose main symptom is neurogenic claudication. METHODS: We selected 21 patients with degenerative spondylolisthesis who were referred for surgical treatment. 8 men and 13 women between aged 36 and 77 years were evaluated. The standardized surgical procedure was posterolateral arthrodesis with instrumentation and decompression associated. Patients were evaluated by VAS, Oswestry Disability Index and Roland-Morris questionnaire preoperatively, with one month, six months, one year, and two years of follow up. Data were analyzed statistically with a significance level of 5%. RESULTS: The most frequently operated level was L4-L5 with 52.38%. VAS had significant improvement of 53.48% 6 months after the procedure. The Oswestry Disability Index showed a worsening in the first month, with improved capacity until the sixth month, remaining constant until the end of follow up. According to the Roland-Morris Disability questionnaire there was a significant progressive improvement up to six months and, finally, a slight worsening. CONCLUSION: Patients with degenerative spondylolisthesis who underwent posterolateral instrumented fusion and decompression showed significant improvement in quality of life and pain after two years of monitoring.

  11. Prevention of skin reactions due to teletherapy in women with breast cancer: a comprehensive review Prevención de las reacciones en la piel debido a teleterapia en mujeres con cáncer de mama: revisión integradora Prevenção de reações de pele devido à teleterapia em mulheres com câncer de mama: revisão integrativa

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    Marceila de Andrade

    2012-06-01

    Full Text Available One of the possible courses of cancer treatment is teletherapy, and one of the most important adverse side effects are skin reactions, an ailment more commonly called radiodermatitis. The main purpose of this study is to analyze knowledge of the evidence about topical products used in the prevention of radiodermatitis, to support care delivery to women with breast cancer during teletherapy. The research method used here is the comprehensive literature review. Four databases were used to select the bibliography. The sample consists of 15 articles. The data shows that, among the topical products analyzed here, Calendula, corticosteroids and Xclair have shown significant protective effects, underlining their actions. The lack of articles published in Brazil highlights the need for further research in this area, seeking better care quality through the use of products with scientifically proven efficiency.Teleterapia está entre las modalidades de tratamiento para el cáncer y uno de sus principales efectos adversos son reacciones de la piel, comúnmente llamado radiodermatitis. Este estudio objetivó analizar el conocimiento acerca de los productos tópicos utilizados para la prevención de la radiodermatitis que justifiquen la atención en teleterapia en mujeres con cáncer de mama. Se adoptó como método de investigación la revisión integradora de la literatura. Para la selección de los artículos se utilizaron cuatro bases de datos. La muestra fue constituida por 15 artículos. Los datos muestran que entre los productos tópicos analizados la caléndula, esteroides y Clair X tuvo un efecto protector significativo, destacando así por sus acciones. La ausencia de artículos publicados en Brasil se centra en la necesidad de seguir investigando para mejorar la calidad de la atención mediante el uso de productos con una eficacia científicamente probada.Dentre as modalidades de tratamento para o câncer está a teleterapia, e um dos principais efeitos adversos dessa modalidade são as reações de pele, comumente chamadas radiodermatites. O presente estudo teve como objetivo analisar o conhecimento sobre as evidências acerca de produtos tópicos, utilizados na prevenção de radiodermatite, que fundamente o cuidado em teleterapia direcionado a mulheres com câncer de mama. Adotou-se como método de pesquisa a revisão integrativa da literatura. Para a seleção da bibliografia utilizaram-se quatro bases de dados. A amostra constitui-se de 15 artigos. Os dados demonstram que, dentre os produtos tópicos analisados, a calêndula, os corticoesteroides e o Xclair tiveram efeito protetor significante, destacando-se, assim, pelas suas ações. A ausência de artigos publicados no Brasil mostra a necessidade de mais pesquisas nessa área, visando a melhor qualidade na assistência a mulheres com câncer de mama, por meio da utilização de produtos com eficácia comprovada cientificamente.

  12. Depth dose distribution in the water for clinical applicators of {sup 90}Sr + {sup 90}Y, with a extrapolation mini chamber; Distribuicao de dose em profundidade na agua para aplicadores clinicos de {sup 90}Sr + {sup 90}Y, com uma mini-camara de extrapolacao

    Energy Technology Data Exchange (ETDEWEB)

    Antonio, Patricia de Lara; Caldas, Linda V.E., E-mail: patrilan@ipen.b, E-mail: lcaldas@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Oliveira, Mercia L., E-mail: mercial@cnen.gov.b [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2009-07-01

    This work determines the depth dose in the water for clinical applicators of {sup 90}Sr + {sup 90}Y, using a extrapolation mini chamber developed at the IPEN, Sao Paulo, Brazil, and different thickness acrylic plates. The obtained results were compared with the international recommendations and were considered satisfactory

  13. Absolute absorbed dose measurements with an array of ionization chambers as part of a routine procedure of quality control for the VMAT technique; Medidas de dosis absorbida absoluta con un array de camaras de ionizacion como parte de un procedimiento rutinario de control de calidad para la tecnica VMAT

    Energy Technology Data Exchange (ETDEWEB)

    Clemente Gutierrez, F.; Cabello Murillo, E.; Ramirez Ros, J. C.; Casa de Julian, M. A. de la

    2011-07-01

    Arcotheraphy techniques volumetric modulated (VMAT) treatments involve continuous variation of the gantry rotation speed, positions of the sheets and dose rate. Since all treatments are administered by continuous arcs, these techniques require quality control procedures to ensure quick and easy constancy of the calibration factor (total absorbed dose) for any gantry angle. We report here a simple method of quality control for the measurement of the calibration factor using an array of ionization chambers. The measurements were performed on a unit of 6 MV Elekta Synergy with VMAT, belonging to the Radiation Oncology service of the Defense Central Hospital Gomez Ulla.

  14. Reuse of the red brick waste and dust waste of blasting chamber (glass micro spheres) in the red ceramic industry; Reaproveitamento dos residuos de tijolos vermelhos e do residuo de poeira da camara de jateamento (micro esferas de vidro) na industria de ceramica vermelha

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, R.A.; Felippe, C.E.C.; Guimaraes, C.S.; Almeida, V.C., E-mail: valeria@eq.ufrj.b [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Centro de Tecnologia. Escola de Quimica

    2010-07-01

    The search for alternative environmentally less aggressive disposal of solid waste has been adopted to reverse the negative scenario established by the improper disposal of these materials. The aim of this study was to evaluate the reuse of waste: leftover red brick from the civil construction and glass micro spheres, obtained from the blasting chamber, aiming to develop a ceramic product. Mixtures containing various amounts of waste were prepared. The ceramic pieces were burned at 1000 and 1200 deg C being tested for water absorption and tensile strength and characterized by X-ray diffraction. The analysis of volatile organic compounds released during the burning process was performed. The results indicate that the ceramic material produced has a high resistance although the analysis of gases from the burning point to a negative environmental impact. (author)

  15. The test of intrinsic uniformity is one of the basic tests to check the status of the detectors of gamma cameras, and as such is contained in RD 1 841/1997 Quality Control in Nuclear Medicine; Protocolo NEMA para el calculo de la uniformidad intrinsica en gamma-camaras: aplicacion y comparacion con el software del fabricante

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Soto, X. L.; Gonzalez Ruiz, C.; Lopez-Boto, M. A.; Polo Cezon, R.

    2015-07-01

    Spanish Protocol Quality Control Instrumentation in Nuclear Medicine provides guidelines for conducting this test, similar to those established in the NEMA protocol NEMA Protocol for the calculation of the uniformity intrinsic in GAMMA cameras: application and comparison with the SQFTWARE of the manufacturer. it is advisable to conduct a study to ensure that the results for the test of intrinsic uniformity of the software provided by the equipment manufacturer are equivalent to those obtained by applying the protocol recommended by the SEFM before using this software for performing quality control. (Author)

  16. Validation of the Read Out Electronics for the CMS Muon Drift Chambers at Tests Beam in CERN/GIF; Validacion en el Test Beam del CERN/GIF de la electronica de Lectura de las Camaras de Muones del Experimento CMS

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, C.; Fouz, M. c.; Marin, J.; Oller, J. C.; Willmott, C.; Amigo, L. J.

    2002-07-01

    Part of the readout system for the CMS muon drift chambers has been tested in test beams at CERN/GIF. Read Out Board (ROB) and HPTD have been validated with signals from a real muon beam, with an structure and flux similar to LHC operating conditions and using one of the chambers produced in CIEMAT already located in the test beam area under normal gas and voltage conditions. (Author) 5 refs.

  17. Quality control of the prostate tumor dosimetry performed by real-time dosimetry system COMPASS transmission chamber; Control de calidad de la dosimetria de tumores de prostata realizados mediante dosimetria en tiempo real con el sistema de camara de trasmision COMPASS

    Energy Technology Data Exchange (ETDEWEB)

    Delgado, J. M.; Sanchez Cayuela, C.; Casal, M. d.; Pereza, C.; Brosed, M. L.; Sanchez, A.

    2011-07-01

    The most commonly used methodology for the verification of IMRT planning using radiochromic films and specific measures in a homogeneous phantom which move the control points of treatment. This system has the drawback of using a homogeneous model ignores the effect of the heterogeneities and the peculiarities of the patient's anatomy. This coupled with the fact obtain an evaluation in real time of each treatment fraction led us to use the new system COMPASS (I was Dosimetry) for the validation of planning.

  18. Comparison between IAEA/TRS-277 and IAEA/TRS-398 protocols for electron beam dosimetry with cylindrical ionization chambers; Comparacao entre os protocolos IAEA/TRS-277 e IAEA/TRS-398 para dosimetria em feixes de eletrons com camaras de ionizacao cilindricas

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Roberto Salomon de

    2004-07-01

    With the purpose to guarantee an uncertainty in the dosimetry in radiation therapy, the International Atomic Energy Agency (IAEA) published in 1987 the Technical Reports Series (TRS) number 277 - Absorbed Dose Determination in Photon and Electron Beams - An International Code of Practice -, updated in 1997, when was published its second edition. In 2000 was published the TRS number 398 - Absorbed Dose Determination in External Beam Radiotherapy - An International Code of Practice for Dosimetry Based on Standards of Absorbed Dose to Water. The TRS number 398 brings a great conceptual change in relation to the basis of the formalism, before based on calibration factor in terms of air kerma, and now based on calibration factor in terms of absorbed dose in water. Since the TRS number 398 was published, the Secondary Standard Dosimetry Laboratories are calibrating the user's ionization chambers in terms of absorbed dose to water. However, nor all the clinics in Rio de Janeiro and Brazil have its ionization chambers calibrated in terms of absorbed dose to water. The National Cancer Institute, where the measurements were taken, was the first institution in the Rio de Janeiro to have its ionization chambers calibrated in terms of a new formalism. This work describes a comparison between dosimetry done with a cylindrical ionization chamber under electron beams utilizing the TRS number 277 formalism, based on air kerma, and the TRS number 398 formalism, based on absorbed dose to water, reporting the uncertainties variation of the dosimetry associated to each protocol. (author)

  19. Implementation of the method air-kerma product area in KAP camera calibration with reference qualities of X-ray series at the SSDL RQR of Mexico; Implementacion del metodo producto kerma en aire-area en la calibracion de camaras KAP con calidades de referencia de rayos X de la serie RQR en el LSCD de Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Cejudo, Jesus; Tovar, Victor M., E-mail: jesus.cejudo@ini.gob.mx, E-mail: victor.tovar@inin.gob.mx [lnstituto Nacional de lnvestigaciones Nucleares (DMRI/LSDC/lNlN), Ocoyoacac (Mexico). Centro Nuclear Dr. Nabor Carrillo Flores. Laboratorio Secundario de Calibracion Dosimetrica

    2013-10-01

    The X-Ray machines, at a reference laboratory for the instrument calibration in diagnostic radiology, should compliance with the ISO requirements. Sometimes there is not available as much laboratories as needed in Latin American countries. So this project shows the KAP ionization chamber implementation method using the TRS-457 radiation quality from the IAEA at the SSDL of Mexico. The KAP instruments calibration method consists in doing a substitution comparison using a standard reference with traceability to a primary laboratory and a transmission-monitoring chamber that measures the number of photons of the X-ray primary beam. A KAP chamber calibration requires a special array that consists in collocating the chamber in two different positions of its calibration process. Then, with air kerma-area product coefficient together with a corrected electrometer measure at referential conditions, the patient dosimetry magnitudes are calculated. The dosimetry necessity at hospitals always will be in function of possessing a highly reliable calibration coefficient chamber for making these measures. That dosimetry results will help in reducing the total or partial irradiation emitted to the human body of the patient. This is how stochastic risks will be lessened due to diagnostic studies. The purpose of this project is to have a synergy with calibration for making known that the SSDL of Mexico has the technical capacity to act as a link between primary standard dosimetry laboratories and the ionizing radiation equipment users who require that their KAP chamber have traceability from the primary standard to the user. (author)

  20. Dens in dente: Caraterísticas histológicas de un extraordinario caso de dens in dente

    OpenAIRE

    Macorra García, José Carlos de la; Pérez de Miguelsanz, Julia; Puerta Fonollá, Javier

    1989-01-01

    Decribimos un extraordinario caso de dens in dente en un germen accesorio de localización central de un feto anencéfalo. Las características de presentar esmalte rodeando una dentina y una cavidad pulpar histológicamente normales nos llevan a sugerir el término "dente in dente" para describir esta alteración, previamente inédita.

  1. Retention proposal in complex cavities.

    OpenAIRE

    Pedro Alvarez Rodríguez; Eduardo M. Curbeira Hernández; Eduardo Duarte Marrero; Yisell Peláez Rivas; Aracelis Navarro Sánchez

    2003-01-01

    Background: Dental Operatory is the main structure in which Odontology lies. It is not an easy discipline that gives enjoyable results with little effort due to the difficulties that a correct reconstruction of a destroyed dental element offers.The frequency with which pulpar injury occurs while anchoring additional retainers in complex cavities, the technical difficulties the lack of these devices cause and the need to simplify dental procedures lead this study to show the advantages to subs...

  2. Casca de arroz e palhada de soja na compostagem de carcaças de frangos de corte = Rice husks and soy straw as substrate for composting of broiler carcasses

    OpenAIRE

    Paulo Giovanni de Abreu; Doralice Pedroso-de-Paiva; Valéria Maria Nascimento Abreu; Arlei Coldebella; Taiana Cestonaro

    2011-01-01

    Avaliou-se a atuacao da casca de arroz e da palhada de soja como substrato para compostagem de carcaca de frangos de corte, observando a degradacao dos dois substratos e das carcacas pelo monitoramento da temperatura, peso das carcacas e dos substratos e analise fisicoquimica do produto final. As camaras foram montadas com carcacas de 10 aves recem abatidas, com quatro repeticoes no tempo. Instalou-se em cada camara um termopar para registro da temperatura. O substrato e as carcacas foram pes...

  3. Environmental conditions and drenched-applied paclobutrazol effects on lantana specific leaf area and N, P, K, and Mg content

    Directory of Open Access Journals (Sweden)

    Aristidis Matsoukis

    2014-03-01

    Full Text Available Lantana camara L. is used extensively in many countries as an ornamental plant species but limited information is provided about the fertilization of this plant, especially after treatments with the triazole paclobutrazol (PBZ. The effects of drenched-applied PBZ at concentrations of 0, 40, and 80 mg L-1 on specific leaf area (SLA and leaf N, P, K, and Mg concentrations of L. camara L. subsp. camara (lantana plants were examined under different environmental conditions, resulted from different shading levels, 0% (daily light quantity of 27.8 mol m-2 d-1 and 66% (9.4 mol m-2 d-1 in glasshouse experiments in Attica, Greece. The concentration of leaf N was affected by the PBZ treatment (P < 0.01, while the shading level affected K and Mg concentration (P < 0.01. Plants treated with the same PBZ concentration presented higher SLA with 66% shading compared to 0% shading. The more the PBZ concentration, the lower and the higher were the SLA and leaf N respectively, at both shading levels. Leaf P, in general, increased with increasing PBZ concentration and shading as did K and Mg at 66% shading compared to 0% shading. At the end of the experiment all plants were healthy with no visible symptoms of nutritional deficiency. The findings of our study could be useful in establishing a fertilization program for L. camara plants treated with different drenched-applied PBZ concentrations under various environments.

  4. The Custodial Parent-Child Relationship as a Mediating Factor in the Effects of Divorce on Children.

    Science.gov (United States)

    Rasmussen, Janis Carol

    Hess and Camara (1979) have shown that it is post-divorce family functioning, rather than family structure, that is most important in influencing the effects of divorce on children. A child's adjustment to divorce should be viewed as a developmental process rather than as a single event. Consequently, it is important to focus on the ways in which…

  5. IKRO ORGANISME LOKAL) SEBAGAI INSEKTISIDA NABATI TERHADAP POPULASI HAMA UTAMA KEDELAI DAN MUSUH ALAMINYA

    OpenAIRE

    Saranga, Annie Papulung; Agus, Nurariaty; Gass a, Ahdin; Fatahuddin

    2013-01-01

    Penelitian dalam bentuk percobaan bertujuan untuk mengetahui dampak aplikasi ekstrak tiga jenis tumbuhan yakni daun Nimba, buah Mengkudu dan daun Tembelekan (L,camara) Masing - masing bahan tumbuhan dihaluskan kemudian difermentasi ( dibuat MOL) kemudi an dibandingkan dengan ekstrak tanpa fermentasi untuk dijadikan insektisida nabati terhadap populasi hama utama kedelai dan musuh alaminya telah dilaksanakan di Kebun Percobaan Balai Penelitian Serealia Maros dan labo...

  6. Sobre a morte da cobaya consecutiva á dupla Vagotomia

    Directory of Open Access Journals (Sweden)

    Miguel Ozorio de Almeida

    1920-01-01

    Full Text Available 1. A secção dos vagos na cobaya produza morte em prazos que variam de meia hora a algumas horas. 2. A morte se dá por intensas lesões pulmonares, caracterisadas por congestão e edema. 3. As cobayas introduzidas em camaras em que a atmosphera tem altas tensões de gaz carbonico, caem anesthesiadas ao fim de alguns segundos, seguindo-se logo depois a morte. Na autopsia, se encontram lesões pulmonares muito semelhantes ás que se verificam nas cobayas vagotomisadas. 4. Nas cobayas profundamente anesthesiadas pelo chloral, a sobrevida á vagotomia é muito maior que nas cobayas não anesthesiadas. Nesses casos a morte muitas vezes se dá quando o animal vem a despertar da anesthesia. 5. Foram feitas novas experiencias que demonstram produzir a novocaina uma interrupção completa de todas as fórmas de conductibilidade dos nervos. 6. Quando se produz a secção physiologica pela novocaina dos vagos na cobaya, observam-se modificações do typo respiratorio que se caracterisam por diminuição consideravel da frequencia e augmento da amplitude. A respiração não apresenta porém, o typo francamente dyspneico, istoé, ella não se faz com difficuldade. 7. A secção physiologia dos pneumogastricos permitte uma sobrevida muito maior que a secção cirurgica. 8. A morte nas condições da conclusão precedente se dá pelas mesmas lesões pulmonares que se encontram habitualmente depois de secção cirurgica, mas é produzida unicamente pela irritação dos pneumogastricos exercida pelas gotteiras de borracha e pelo algodão, depois que a novocaina é absorvida e que se dissipa a anesthesia local. 9. Quando se operam as secções dos vagos com irritações variaveis as sobrevidas são differentes. 10. A sangria immediata não tem effeito sobre o tempo de vida da cobaya vagotomisada. 11. A sangria tardia parece augmentar ligeiramente essa sobrevida. Todos os factos expostos neste trabalho demonstram: 1 De um lado a irritação sem secção dos

  7. Determination of the correction factor for attenuation, dispersion and production of electrons (K{sub wall}) in the wall of graphite of a ionization chamber Pattern National Type CC01 in fields of gamma radiation of {sup 60}Co; Determinacion del factor de correccion por atenuacion, dispersion y produccion de electrones (K{sub wall}) en la pared de grafito de una Camara de Ionizacion Patron Nacional Tipo CC01 en campos de radiacion gamma de {sup 60} Co

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez R, J.T.; Morales P, J.; Cruz E, P. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2001-12-15

    It was determined the Kwall correction factor for the wall of graphite of the chamber of the pattern national type CC01 series 133 for a radiation field Gamma of {sup 60}Co. With this end to measured the currents of ionization l(x) as function of the thickness of the wall of the chamber: X=4,8,12,16 and 20 mm.The mensurations for each thickness consisting of three groups, of sizes n = 30 or 60 data for each group; obtaining 8 complete groups of mensurations independent in eight different dates.The determinate the factor carried out using three regression models: lineal, logarithmic and quadratic, models that were tried to validate with the tests of : i) Shapiro-Wilk and {chi}{sup 2} for the normality of the entrance data ii) Tests of Bartlett for variances homogeneity among groups for each thickness iii) The tests of Duncan for the stockings among groups of each thickness, and iv) The tests of adjustment lack (LOF) for the models used. Nevertheless, alone the models of the group of corresponding mensurations at 01-03-2000 17-08-2001 they can be validated by LOF, but not for tests of normality and homogeneity of variances. Among other assignable causes of variation we have: i) The values captured by the system of mensuration of the variables of it influences: pressure, temperature and relative humidity don{sup t} belong together with the existent ones to the moment to capture the l(x). ii) The mensuration room presents flows of air, for what was suited o diminish their volume and to eliminate the flows of air. iii) A protocol settled down of taking of measures that it consisted in: - Pre-irradiation 5 minutes the chamber after the change of polarity and hood change, with a period of stabilization of 5 minutes after the pre-irradiation. - Pre-irradiation for 5 minutes before the taking of the readings, with the object of eliminating variation sources assigned to currents of escapes or due variations to transitory. iv) To realize corrections for relative humidity of agreement with the reference, [13). Nevertheless, our values of Kwall = 1.1035 {sub +} 0.08% and those reported by the manufacturer (Kwall=1.0136), both fixeds with a lineal model, defer a maximum of 0.1%. (Author)

  8. Retention proposal in complex cavities.

    Directory of Open Access Journals (Sweden)

    Pedro Alvarez Rodríguez

    2003-12-01

    Full Text Available Background: Dental Operatory is the main structure in which Odontology lies. It is not an easy discipline that gives enjoyable results with little effort due to the difficulties that a correct reconstruction of a destroyed dental element offers.The frequency with which pulpar injury occurs while anchoring additional retainers in complex cavities, the technical difficulties the lack of these devices cause and the need to simplify dental procedures lead this study to show the advantages to substitute additional retainers for a retainer surcus. Method: An observational descriptive study was applied to 53 patients(42% of the universe , sample which was selected by means of a simple randomized sample . From a proximal-occlusal cavity, the preparations were extended in a box-like shape towards the bucal or lingual region and the additional retainers were substituted for a surcus which was performed in the gingival wall of the preparation. Calcium Hydroxide of rapid dryness was used as a cavity cover and Policarboxilate cement as a base; then the amalgam restoration was performed. The number of restorations were studied taking into account the patient´s age and the failures due to fractures of amalgam, loss of vitality and periapical changes were assessed taking into consideration the patient´s age and a one- year follow up. Results: Most of the amalgam restorations were performed in patients aged from 35 to 59 years and the relative frequencies due to fractures of amalgam, loss of vitality and periapical changes were very low. Conclusion: The substitution of additional retainers for a retainer surcus in complex cavities of vital molars showed to be advantageous because it guarantees a less degree of pulpar damage and less pulpar damage.

  9. Sensibilidad dentaria Dental sensibility

    OpenAIRE

    P. Tortolini

    2003-01-01

    La sensibilidad dentaria l es un problema común que se presenta entre el 9 y el 30% de la población adulta. La teoría hidrodinámica es aceptada como uno de los mecanismos de inducción de la respuesta pulpar dolorosa, debido a que los estímulos provocan el movimiento del fluido y para ello es necesario que la dentina este expuesta y que los túbulos dentinarios estén abiertos y permeables a la pulpa. Es fundamental realizar el diagnostico diferencial con otras causas de dolor dental e identific...

  10. Técnicas reportadas en la literatura que remueven parcialmente el tejido infectado para el manejo de lesiones profundas de caries: revisión narrativa de la literatura

    OpenAIRE

    Guerrero Torres, Claudia Isabel

    2014-01-01

    Según el último Estudio Nacional de Salud Bucal en Colombia, la caries cavitacional afecta a los adolescentes en un 89.75% y la pérdida de dientes por caries asciende a 16,2 en adultos mayores. La pérdida dental en ocasiones obedece a tratamientos operatorios poco conservadores que exponen la pulpa sin ser estrictamente necesario y las terapias pulpares no son tan predecibles. El objetivo de este trabajo fue revisar las técnicas que remueven parcialmente tejido infectado para e...

  11. Efecto de diferentes concentraciones de hipoclorito de sodio como irrigante endodóntico sobre propiedades físicas de la dentina. Una revisión de la literatura

    OpenAIRE

    Guevara Lizarazo, Diana Carolina

    2014-01-01

    El principal objetivo del tratamiento endodóntico convencional es tratar las patologías pulpares, promoviendo la reparación apical y así mantener el diente afectado en función, libre de signos y síntomas clínicos y radiográficos. Para lograrlo es necesario eliminar el material antigénico (restos de tejido necrótico y/o microrganismos y sus productos metabólicos) presentes en el sistema de conductos radiculares. Este procedimiento involucra instrumental y sustancias químicas den...

  12. Regeneración tisular: estudio de la diferenciación in vitro de las células madre de la pulpa dental

    OpenAIRE

    Peydró Tomás, Santiago

    2015-01-01

    En el tejido pulpar dental, entre las diversas poblaciones celulares que lo forman, encontramos células madre de origen ectomesenquimático. Actualmente estas células se denominan DPSC (dental pulp stem cells o células madre de la pulpa dental). Las DPSC han demostrado una gran capacidad de diferenciación en función del entorno biológico en el que se han cultivado, describiéndose su diferenciación neuronal, osteogénica, condrogénica, muscular y adiposa, lo que las sitúa como una alternativa vá...

  13. Estudio paleopatológico de una hemimandíbula de Tethytragus (Artiodactyla, Mammalia) del Mioceno Medio de Somosaguas (Pozuelo de Alarcón, Madrid)

    OpenAIRE

    Sala Burgos, Nohemi; Cuevas González, Jaime; López Martínez, Nieves

    2007-01-01

    En este artículo se estudia el origen paleopatológico de una cavidad situada en el talónido del primer molar inferior en una hemimandíbula de Tethytragus (Artiodactyla, Mammalia) hallada en el yacimiento paleontológico del Mioceno Medio (Aragoniense) de Somosaguas Norte (Pozuelo de Alarcón, Madrid). El molar afectado muestra un desgaste anómalo con una fuerte reducción de la altura del talónido y una gran cavidad, que conecta la superficie oclusal con la cámara pulpar, bordeada de dentina ...

  14. Estudio paleopatológico de una hemimandíbula de Tethytragus (Artiodactyla, Mammalia) del Mioceno Medio de Somosaguas (Pozuelo de Alarcón, Madrid)

    OpenAIRE

    Sala-Burgos, N.; Cuevas-González, Jaime; López Martínez, Nieves

    2007-01-01

    [ES] En este artículo se estudia el origen paleopatológico de una cavidad situada en el talónido del primer molar inferior en una hemimandíbula de Tethytragus (Artiodactyla, Mammalia) hallada en el yacimiento paleontológico del Mioceno Medio (Aragoniense) de Somosaguas Norte (Pozuelo de Alarcón, Madrid). El molar afectado muestra un desgaste anómalo con una fuerte reducción de la altura del talónido y una gran cavidad, que conecta la superficie oclusal con la cámara pulpar, bordeada ...

  15. Sistemas ultrasónicos para la irrigación del sistema de conductos radiculares

    OpenAIRE

    A. García Delgado; J. Martín-González; L. Castellanos-Cosano; Martín Jiménez, M.; J.J. Segura-Egea

    2014-01-01

    La eliminación de los restos de tejido pulpar vital y necrótico y de los microorganismos del sistema de conductos radiculares, es esencial para el éxito en endodoncia. La desinfección del canal radicular mediante la irrigación e instrumentación es el factor más importante en la prevención y tratamiento de la periodontitis apical. Al ser imposible con la instrumentación llegar a todas las áreas del sistema de conductos, la irrigación cobra especial importancia. Por este motivo, en la última dé...

  16. Granuloma periapical: tratamiento convencional. Reporte de un caso

    OpenAIRE

    Natalia Patricia Harris Ortega; Fernando Javier Guzman Lopez; Antonio Díaz Caballero

    2014-01-01

    Title: Periapical granuloma: conventional treatment. Case reportLos Granulomas radiculares son lesiones periapicales crónicas, consideradas secuelas directas de procesos infecciosos resultantes de la necrosis pulpar, extendiéndose hacia la región perirradicular. Los granulomas se pueden presentar por fallas en los tejidos duros, resultantes de caries, fracturas y procedimientos quirúrgicos. Se realizó tratamiento de endodoncia convencional con preparación invertida a paciente de 15 años con d...

  17. Anatomía de los conductos radiculares de los molares a través de los restos fósiles de la cueva del Mirador (Atapuerca)

    OpenAIRE

    Ceperuelo Sánchez, Mª Dolors

    2015-01-01

    L’anatomia i la morfologia del conductes radiculars dels molars, presenten uns trets determinats. Existeixen nombroses classificacions en l’especialitat d’endodòncia (odontologia), que ens mostren el recorregut del teixit pulpar desde la zona més coronal a l’àpex de la dent. Una de les més utilitzades actualment, és la classificació de Vertucci. Però, com eren els molars de fa més de 4.000 anys? És aplicable aquesta clasificació a les restes fòssils? Amb l’arribada de les noves tecnologies...

  18. Tres casos de odontomas

    OpenAIRE

    Salvador Javier Santos Medina; Haideé Tamara Díaz Méndez; Giselle Ávila Chiong

    2015-01-01

    Los odontomas son los tumores odontogénicos más comunes, casi siempre se diagnostican accidentalmente, en exámenes radiográficos; pueden sospecharse al retardar el brote dentario o producir maloclusiones. Se clasifican en odontomas compuestos y complejos, ambos constituidos por estructuras dentales como: esmalte, dentina, cemento y tejido pulpar. Su eliminación quirúrgica y la biopsia es el tratamiento de elección. El propósito de este trabajo es reportar tres casos de pacientes atendidos en ...

  19. La endodoncia en los pacientes mayores

    OpenAIRE

    B. Martín Biedma; P. Castelo Baz; E. Otero Rey; M. Ruiz Piñón; A Blanco Carrión

    2015-01-01

    La endodoncia en el paciente geriátrico es un procedimiento cada vez más habitual en la clínica odontológica. Debemos, dadas las características médicas y dentales de muchos de estos pacientes mayores, planificar correctamente los procesos instrumentales y prever las posibles dificultades que puedan surgir motivadas por conductos estrechos, cámaras pulpares calcificadas etc. En la instrumentación de estos dientes, someteremos a los instrumentos a alto estrés por torsión, motivado por la ampli...

  20. Aplicación del láser de femtosegundo en dentina: análisis morfológico y mejora de la eficacia adhesiva resina-dentina

    OpenAIRE

    Portillo Muñoz, María

    2014-01-01

    [ES]El instrumental rotatorio ha sido utilizado para la preparación cavitaria y la remoción de caries desde los inicios de la operatoria dental. Sin embargo, esta técnica presenta algunos inconvenientes entre los que podemos destacar los efectos térmicos y mecánicos sobre la superficie. Por ello, el láser se presenta como una alternativa a la técnica convencional para intentar minimizar o anular dichos efectos que pueden comprometer la vitalidad pulpar y la eficacia adhesiva de las resinas a ...

  1. Influence of the restoration quality on the success of pulpotomy treatment: a preliminary retrospective study Influência da qualidade da restauração sobre o sucesso da pulpotomia: estudo preliminar

    Directory of Open Access Journals (Sweden)

    Flávio Fernando Demarco

    2005-03-01

    devido à exposição por cáries, sendo que todas as restaurações foram confeccionadas com resina composta. A idade dos pacientes variou de 15-50 anos (média de 23,9 anos e o tempo médio de acompanhamento das pulpotomias foi de 34,52 meses. Avaliações clínicas e radiográficas foram realizadas para a avaliação das pulpotomias. Ausência de hipersensibilidade, de alterações periapicais e teste de vitalidade pulpar positivo, eram as condições necessárias para que o tratamento fosse incluído no grupo "clinicamente favorável" utilizados para avaliar a condição clínica dos dentes tratados. Os critérios de avaliação clínica da USPHS foram utilizados para avaliar a qualidade das restaurações. Dez dentes (43,5% receberam o escore clinicamente favorável, 4 anteriores e 6 dentes posteriores. O critério falha foi atribuído a 13 dentes (56,5%, 4 dentes anteriores e 9 posteriores. Entre os dentes do grupo clinicamente favorável, 90% das restaurações foram classificadas como clinicamente satisfatória, enquanto 10% estavam insatisfatórias. No grupo onde houve falha, 77,8% das restaurações foram classificadas como insatisfatória enquanto 22,2% foram classificadas como satisfatórias. A análise estatística (Teste exato de Fisher demonstrou que existe uma associação estatisticamente significante entre a condição clínica da pulpotomia e a qualidade da restauração (p<0,05. Respeitando as limitações do estudo, é possível verificar que a qualidade da restauração pode ser um fator influente para uma condição clínica favorável de dentes tratados com pulpotomia. Estudos clínicos controlados são necessários para confirmar esses achados preliminares.

  2. Hybrid solar-electric oven construction prototype; Construccion de prototipo de horno hibrido solar-electrico

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Roman, M. A; Pineda Pinon, J; Arcos Pichardo, A [CICATA, Santiago de Queretaro, Queretaro (Mexico)

    2013-03-15

    The oven construction consists of a solar collector system of cylindrical parabolic type, a heating through electrical resistance and a curing chamber. The warm fluid is air, which is injected into the chamber through forced draft. The temperature required in the system is within a range of 150 to 300 degrees Celsius. [Spanish] La construccion del horno consta de un sistema de captacion solar del tipo cilindrico parabolico, un sistema de calentamiento a traves de resistencias electricas y una camara de curado. El fluido a calentar es aire, el cual es inyectado dentro de la camara a traves de tiro forzado. La temperatura solicitada en el sistema es dentro de un rango de 150 a 300 grados centigrados.

  3. ANTIBACTERIAL ACTIVITIES OF ETHANOLIC EXTRACTS OF PLANTS USED IN FOLK MEDICINE

    Directory of Open Access Journals (Sweden)

    Gupta Raj Narayan

    2010-12-01

    Full Text Available The antibacterial activity of the ethanol and aqueous extracts of the leaves of Achyranthes aspera, Alternanthera pungens, Cynodon dactylon, Lantana camara and Tagetes patula was investigated against Bacillus subtilis (MTCC 441 , Staphylococcus aureus (MTCC 3160 and Pseudomonas aeroginosa (MTCC 4673, using agar diffusion technique. Results showed that the only ethanolic extracts of 4 plants species except Alternanthera pungens were effective against all the test microorganisms. The minimum inhibitory concentrations (MIC of the extracts of ethanol were found to be 25 to 125 mg/ml, while the water based extracts showed no inhibition. The results of the study provide scientific basis for the use of the plant extract in the treatment of wounds and skin diseases. Therefore it is concluded that the active principles possessing antibacterial activity may be extracted from the leaves of Achyranthes aspera, Cynodon dactylon, Lantana camara and Tagetes patula by ethanol.

  4. Chemical composition and antibacterial activity of essential oils from verbenaceae species: alternative sources of (E-caryophyllene and germacrene-D

    Directory of Open Access Journals (Sweden)

    Ricardo M Montanari

    2011-09-01

    Full Text Available Volatile oils from the leaves of Verbenaceae species Aloysia virgata, Lantana camara, Lantana trifolia, Lantana montevidensis, Lippia brasiliensis and Lippia sericea were investigated for its chemical composition and antibacterial activity. The volatile oils were characterized by a high content of sesquiterpenes of which (E-caryophyllene (10-35%, germacrene-D (5-46% and bicyclogermacrene (7-17% were the major components for all studied species. For the flowers, a higher concentration of monoterpenes was observed for the species L. camara, L. trifolia and L. brasiliensis. These compounds probably act as attractive to specific pollinators. The volatile oils from A. virgata was the most active, exhibiting moderate antimicrobial activity against the bacteria Staphylococcus aureus, Bacillus cereus and Escherichia coli.

  5. Invasion establishment and habitat suitability of Chromolaena odorata (L.) King and Robinson over time and space in the western Himalayan forests of India

    OpenAIRE

    Gautam Mandal; Shambhu Prasad Joshi

    2014-01-01

    Habitat suitability assessment of the invasive species Chromolaena odorata (L.) King and Robinson from Himalayan forests reveals some interesting findings and conclusions. At different study sites, 29 of 72 species were exotic and invasive and comprised 21 genera and eight families. Indigenous species accounted for 59% of the total species and comprised 26 genera and 11 families. Perennials outnumbered the annuals in all study sites. Chromolaena odorata and Lantana camara L. were the only inv...

  6. Studies on the lichen genus Sticta (Schreber) Ach. : 5., Australian species

    OpenAIRE

    Galloway, David J.

    1998-01-01

    Twenty five species of Sticta occur in Australia. These are: Sticta baileyi, S. brevipes, S. camarae, S. caperata, S. cyphellulata, S. diversa, S. duplolimbata, S. filix, S. flavocyphellata, S. fuliginosa, S. howei, S. hypopsiloides, S. latifrons, S. limbata, S. marginifera, S. myrioclada, S. pedunculata, S. rutilans, S. sayeri, S. stipitata, S. sublimbata, S. subtomentella, S. variabilis and S. weigelii. A key and descriptions of each taxon are given together with details of biogeography, di...

  7. Los Nuevos Términos Comerciales Internacionales -INCOTERMS- (Versión 2010) Y Su Aplicación En El Derecho Colombiano

    OpenAIRE

    Maximiliano Rodriguez

    2010-01-01

    Los INCOTERMS constituyen un conjunto de reglas internacionales para la interpretación de los usos comerciales más utilizados en las operaciones de comercio exterior. Este artículo constituye una vision panoramica de la última version de esos Terminos Comerciales, que son recopilados por la Camara de Comercio Internacional de Paris. Igualmente, se encarga de examinar las modificaciones que fueron introducidos en la nueva recopilacion de los terminos y su incidencia tanto dentro del ambito int...

  8. A new method for qualitative simulation of water resources systems: 2. Applications

    Science.gov (United States)

    Antunes, M. P.; Seixas, M. J.; Camara, A. S.; Pinheiro, M.

    1987-11-01

    SLIN (Simulação Linguistica) is a new method for qualitative dynamic simulation. As was presented previously (Camara et al., this issue), SLIN relies upon a categorical representation of variables which are manipulated by logical rules. Two applications to water resources systems are included to illustrate SLIN's potential usefulness: the environmental impact evaluation of a hydropower plant and the assessment of oil dispersion in the sea after a tanker wreck.

  9. Evaluation of the Larvicidal Efficacy of Five Indigenous Weeds against an Indian Strain of Dengue Vector, Aedes aegypti L. (Diptera: Culicidae)

    OpenAIRE

    Aarti Sharma; Sarita Kumar; Pushplata Tripathi

    2016-01-01

    Background and Objectives. Aedes aegypti, dengue fever mosquito, is primarily associated with the transmission of dengue and chikungunya in tropical and subtropical regions of the world. The present investigations were carried out to assess the larvicidal efficiency of five indigenous weeds against Ae. aegypti. Methods. The 1,000 ppm hexane and ethanol extracts prepared from the leaves and stem of five plants (Achyranthes aspera, Cassia occidentalis, Catharanthus roseus, Lantana camara, and X...

  10. Quality of environmental impact assessment (EIA) reports on biological pest control / Thea Henriette Carroll

    OpenAIRE

    Carroll, Thea Henriette

    2006-01-01

    Decision making regarding the release of biological control agents for invasive species such as lantana, Lantana camara, requires the consideration and evaluation of environmental impact assessment (EIA) reports by a competent authority. Although various biological control agents have been authorised for release into the environment for the control of lantana, the quality of the EIA reports that form the basis for decision making has never been evaluated. The evaluation of the ...

  11. Equipment to evaluate in experimental form the thermal conductivity of the construction materials; Equipo para evaluar en forma experimental el coeficiente de conductividad termica de los materiales de construccion

    Energy Technology Data Exchange (ETDEWEB)

    Lopez C, Raymundo; Morales G, Juan R.; Diaz C, Alen; Lizardi R, Arturo [Universidad Autonoma Metropolitana-Azcapotzalco, Mexico, D. F. (Mexico); Vaca M, Mabel [Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

    2001-04-01

    An equipment meant to obtain the thermal conductivity coefficient was designed, constructed and evaluated. Convection losses in the experimental device were reduced by means of a vacuum chamber that wraps it. Conduction losses were minimized with the proper insulation. The tested materials are the most frequently used in the construction of buildings in Mexico, such as concrete, burnt brick, adobe and gypsum. Results observed are comparable to those reported in the literature. The essays done using the vacuum chamber produced values of thermal conductivity coefficient 3% lower than those obtained without using it. [Spanish] Se diseno, construyo y evaluo un equipo, con el cual se obtiene el coeficiente de conductividad termica en diversos materiales. En este se reducen las perdidas por conveccion, colocando una camara de vacio alrededor del conjunto de prueba. Las perdidas por conduccion se minimizan con un aislamiento adecuado. Los materiales evaluados son los que mas se utilizan en la construccion en Mexico, a saber, el concreto, el ladrillo cocido, el adobe y el yeso. Los valores obtenidos, sin considerar las perdidas por conveccion, se comparan con los de la literatura. Los ensayos utilizando la camara de vacio proporcionan valores del coeficiente de conductividad termica menores en 3% a los obtenidos sin dicha camara.

  12. Larvicidal activity of plant extracts on Aedes Aegypti L.

    Institute of Scientific and Technical Information of China (English)

    Anitha Rajasekaran; Geethapriya Duraikannan

    2012-01-01

    Objective: To evaluate the larvicidal activity of plant extracts on Aedes aegypti. Methods:Petroleum ether, Chloroform and aqueous extracts obtained from Acalypha indica, Aerva lanata,Boerhaavia diffusa, Commelina benghalensis, Gompherna sps, Datura stramonium, Euphorpia hirta, Cynodon dactylon, Lantana camara and Tridax procumbens were used for larvicidal activity at concentration of 1000μg/ml and the mortality rate was calculated after 24 and 48hrs . The LC50 for the extracts were also estimated after 24 hrs. Results: The petroleum ether extract ofLantana camara, Tridax procumbens and Datura stramonium showed 100% mortality after 48hrs of incubation. Tridax procumbens petroleum ether extract had the least LC50 of 219 μg/ml followed by Lantana and Datura with 251and 288 μg/ml respectively. A combination of petroleum ether extracts of Aerva lanata and Cynodon dactylon, Boerhaavia diffusa and Commelina benghalensis exhibited 100% mortality of larvae. Formulation-1 inhibited the metamorphosis of the larvae by retaining 60% in its larval stage. Petroleum ether extracts of Lantana, Tridax, Datura and a combination of extracts were effective larvicide. The formulations proved to be effective in inhibiting the metamorphosis. Alkaloids and flavonoids were present in datura petroleum ether extract . Conclusions: Either the crude extracts of Datura stramonium, Lantana camara and Tridax procumbens or its phytochemicals can be used as effective vector control agents individually or in combination.

  13. Resultados preliminares sobre la estimación de la edad de muerte a partir de la evaluación de la estructura interna de piezas dentales uniradiculares

    Directory of Open Access Journals (Sweden)

    Luna, Leandro

    2005-01-01

    Full Text Available Se ha documentado que existe una importante correlación negativa entre la edad biológica y las dimensiones de la cavidad pulpar de incisivos, caninos y premolares. Esto se debe a que la depositación de la dentina secundaria en la superficie de la cavidad pulpar continúa con tasas más o menos constantes durante toda la vida del individuo. También se identificaron correlaciones entre edad de muerte y el desarrollo de la retracción periodontal y de la transparencia radicular. De esta manera, analizando la estructura interna de esas piezas dentales mediante inspecciones escópicas y radiográficas, es posible obtener información relevante para estimar las edades de muerte. Estos métodos han sido aplicados con éxito en investigaciones forenses, y deben ser puestos a prueba cuando la muestra proviene de un contexto arqueológico. En esta ponencia se presentan los primeros resultados de la evaluación de diferentes variables métricas en una muestra procedente del Sitio Chenque I (Parque Nacional Lihué Calel, provincia de La Pampa. Las edades de los individuos que componen la muestra fueron estimadas evaluando indicadores confiables como sínfisis púbica y superficie auricular, y luego comparadas con los resultados del análisis dental.

  14. Clay-brick firing in a high-temperature solar furnace

    Energy Technology Data Exchange (ETDEWEB)

    Villeda-Munoz, G. [Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Instituto Politecnico Nacional, Unidad Queretaro, Queretaro (Mexico)]. E-mail: gvilledam@ipn.mx; Castaneda-Miranda, A. [Computation & amp; Mechatronic Studies Division, Universidad Politecnica de Queretaro, Queretaro (Mexico)]. E-mail: acastaneda@upq.edu.mx; Pless, R.C. [Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Instituto Politecnico Nacional, Unidad Queretaro, Queretaro (Mexico)]. E-mail: rpless@ipn.mx; Vega-Duran, J.T. [Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Instituto Politecnico Nacional, Unidad Queretaro, Queretaro (Mexico); Pineda-Pinon, J. [Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Instituto Politecnico Nacional, Unidad Queretaro, Queretaro (Mexico)]. E-mail: jpinedap@ipn.mx

    2011-10-15

    The firing process for clay-brick production in traditional kilns generates atmospheric pollution when industrial and domestic scrap is used as fuel. An alternative is presented here, using the solar energy for clay-brick firing. We are developing a system for clay-brick firing to reach temperatures between 900 degrees Celsius and 1050 degrees Celsius; these temperatures are sufficiently high to fire bricks or similar ceramic products. The present paper describes the design and characterization of the components of a solar furnace for clay-brick firing with inner chamber dimensions of 0.48 * 0.61 * 0.64 m. To convey the sunlight to the firing chamber, a heliostat with nine 1 * 1 m mirrors is used to send the rays of the sun to an off-axis parabolic concentrator that focuses the light on the entrance of the firing chamber. The heliostat has a solar-tracking system which makes primary and secondary adjustments to assure that the reflected solar radiation always arrives at the concentrator. The firing chamber contains a prismatic cavity that absorbs the solar radiation to generate the heat which is needed for baking the bricks inside the firing chamber. [Spanish] El proceso de coccion para la produccion de tabiques de arcilla en hornos tradicionales genera contaminacion atmosferica cuando los desechos industriales y domesticos se usan como combustibles. Aqui se presenta una alternativa, utilizando la energia solar para la coccion de tabiques de arcilla. Estamos desarrollando un sistema para la coccion de tabiques de arcilla para alcanzar temperaturas entre 900 grados centigradosy 1050 grados centigrados; estas temperaturas son suficientemente altas para cocer tabiques o productos ceramicos similares. El presente articulo describe el diseno y caracterizacion de los componentes de un horno solar para la coccion de tabiques de arcilla con una camara con dimensiones internas de 0.48 * 0.61 *× 0.64 m. Para dirigir los rayos solares a la camara de coccion, un heliostato

  15. National pattern for the realization of the unit of the dose speed absorbed in air for beta radiation. (Method: Ionometer, cavity of Bragg-Gray implemented in an extrapolation chamber with electrodes of variable separation, exposed to a field of beta radiation of {sup 90}Sr/{sup 90}Y); Patron Nacional para la realizacion de la unidad de la rapidez de dosis absorbida en aire para radiacion beta. (Metodo: Ionometrico, cavidad de Bragg-Gray implementada en una camara de extrapolacion con electrodos de separacion variable, expuesta a un campo de radiacion beta de {sup 90}Sr/{sup 90}Y)

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez R, M. T.; Morales P, J. R. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2001-01-15

    From the year of 1987 the Department of Metrology of the ININ, in their Secondary Laboratory of Calibration Dosimetric, has a patron group of sources of radiation beta and an extrapolation chamber of electrodes of variable separation.Their objective is to carry out of the unit of the dose speed absorbed in air for radiation beta. It uses the ionometric method, cavity Bragg-Gray in the extrapolation chamber with which it counts. The services that offers are: i) it Calibration : Radioactive Fuentes of radiation beta, isotopes: {sup 90}Sr/{sup 90}Y; Ophthalmic applicators {sup 9}0{sup S}r/{sup 90}Y; Instruments for detection of beta radiation with to the radiological protection: Ionization chambers, Geiger-Muller, etc.; Personal Dosemeters. ii) Irradiation with beta radiation of materials to the investigation. (Author)

  16. Contenido orgánico de extractos parcialmente purificados de pulpa dental humana y bovina

    OpenAIRE

    María Mercedes Salas; María Luisa de la Casa; María Elena López

    2011-01-01

    La pulpa dental contiene tejido conectivo rico en proteínas, mayormente colágeno. El objetivo de este trabajo fue describir un método de purificación de componentes orgánicos pulpares humanos y bovinos, vital y necrótico para validar el modelo experimental bovino. Se prepararon extractos con 50 mg de fracción media de pulpas unirradiculares, 20 humanas o 1 bovina, en 500 µL de Tris-HCl 50 mM pH 7,4, floruro de fenil metil sulfonilo 1mM e hidrocloruro de benzamidina 5 mM frío. Se homogeneizó y...

  17. Utilidad de la radiografía panorámica dental digital en la estimación de la edad en adultos Usefulness of dental digital panoramic radiography in the estimation of age in adults

    OpenAIRE

    M.I. Landa; P.M. Garamendi; M.C. Botella; I. Alemán

    2008-01-01

    La estimación de la edad constituye un campo de creciente interés dentro de la Medicina Forense. La cuantificación de la reducción de las dimensiones de la cavidad pulpar como consecuencia del proceso de depósito de la dentina secundaria a lo largo de la vida podría servir como un posible indicador de edad. Este fenómeno además de mediante técnicas morfológicas, puede ser analizado mediante la utilización de diferentes técnicas radiográficas. El objetivo principal de este estudio consistió en...

  18. Evaluation of the permeability of the furcation area of deciduous molars conditioned with Er:YAG laser and cyanoacrylate Avaliação da permeabilidade da região da furca de molares decíduos condicionada com laser de Er:YAG e cianoacrilatos

    Directory of Open Access Journals (Sweden)

    Adriene Mara Souza Lopes-Silva

    2003-09-01

    Full Text Available The purpose of this study was to evaluate in vitro the dentin permeability of the deciduous pulp chamber floor after employing 2-octyl cyanoacrylate and Er:YAG laser. Twenty four deciduous molars were used, divided into four groups. After chemical-surgical preparation each group received a different treatment: Group 1 - control, without treatment; Group 2 - the floor of the pulp chamber was covered with a fine layer of 2-octyl cyanoacrylate; Group 3 - the floor of the pulp chamber was irradiated with Er:YAG laser (250 mJ, 10 Hz for 30 seconds, 80 J of energy and 320 pulses, and covered with a fine layer of 2-octyl cyanoacrylate; and Group 4 - the floor of the pulp chamber was irradiated with Er:YAG laser set at the parameters already described. After that the specimens received application of 0.5% methylene blue, for 15 minutes. The teeth were cut, photographed, and the digitalized images were analyzed using the ImageLab program. The results obtained were submitted to statistical analysis. Group 4 (Er:YAG presented the largest averages in percentage of dye penetration area (19.5%, followed by Group 1 (11.1%, Group 3 (1.4% and Group 2 (0.2%. The experimental model allowed to conclude that the specimens conditioned with 2-octyl cyanoacrylate (Group 2 and Er:YAG laser associated to 2-octyl cyanoacrylate (Group 3 presented a decrease in permeability, and the specimens treated with Er:YAG laser (Group 4 presented an increase in permeability of the analyzed area.A proposta do presente experimento foi avaliar in vitro a permeabilidade da dentina no assoalho da câmara pulpar de dentes decíduos com o emprego do 2-octil cianoacrilato e laser de Er:YAG. Foram empregados 24 molares decíduos, divididos em quatro grupos. Após preparo químico-cirúrgico, cada grupo recebeu um tratamento diferente: Grupo 1 - controle, sem tratamento; Grupo 2 - o assoalho da câmara pulpar foi coberto com uma fina camada de 2-octil cianoacrilato; Grupo 3 - o assoalho da c

  19. Avaliação da variação de pH e da permeabilidade da dentina cervical em dentes submetidos ao tratamento clareador

    OpenAIRE

    Dezotti Mariela S. G.; Souza Júnior Mário Honorato Silva e; Nishiyama Celso Kenji

    2002-01-01

    A reabsorção cervical externa da raiz é uma das desvantagens do procedimento clareador. Vários são os mecanismos que podem ser responsáveis por desencadear esta reabsorção, dentre eles, a ação química e física dos materiais utilizados, bem como a morfologia da junção amelocementária. Este trabalho teve como objetivo observar uma possível via de comunicação entre a câmara pulpar e a superfície externa da raiz, medindo o pH e a infiltração de corante na dentina cervical após o procedimento clar...

  20. EVALUATION OF SOME POTENTIAL BOTANICALS TO CONTROL POTATO TUBER MOTH, (PHTHORIMAEA OPERCULELLA UNDER STORAGE CONDITION AT BAKO, WESTERN ETHIOPIA

    Directory of Open Access Journals (Sweden)

    Ahmed Ibrahim

    2012-12-01

    Full Text Available Lantana camara, Eucalyptus globulus, Tagetus minuta, Pyrethrum flowers and Azaddiractha indica, were evaluated against potato tuber moth damage with two checks (Diazinon 60% EC and untreated check at Bako Agricultural Research Center in 2007/2008 and 2008/2009 cropping seasons. A total of 21 huts (cottages were constructed from locally available materials.   Inside each cottage (hut, 1m 2 bed was constructed 65 cm above the ground. Six hundred fifty (650 potato tubers were stored on the bed of each hut in two layers one over the other. The treatments were arranged in a Randomized Complete Block Design (RCBD with three replications. Plants powder and Diazinon 60% EC were applied respectively, at the rate of 50 gm / bed and 3.5ml / bed at two months’ interval. The treatments that showed promising effects were further advanced on a large bed (2m x3m. Three thousand nine hundred (3900 potato tubers were stored on large beds and 150gm powders were used for each bed. Evaluations were made at the interval of 15 days for 7 consecutive months. Analysis of variance showed that number of potatoes infested and damaged by potato tuber moth was significantly (PLantana camara, Eucalyptus globulus and Pyrethrum flowers than the other treatments, which are similar to standard check. From the study it can be concluded that Lantana camara, E. globulus andPyrethrum flowers can be used to protect seed potatoes from potato tuber moth damage in storage.

  1. 蝴蝶蜜源与非蜜源植物挥发物成分的差异%Difference between nectar plants and non-nectar plants of butterfly in volatile components

    Institute of Scientific and Technical Information of China (English)

    张雯雯; 郑华; 张弘

    2011-01-01

    采用全自动热脱附-气相色谱/质谱(ATD-GC/MS)联用技术,对动态顶空密闭循环吸附捕集的蝴蝶蜜源植物马缨丹、马利筋及非蜜源植物缅栀子花的挥发物进行分析检测.结果表明,同为蝴蝶的蜜源植物,马利筋和马缨丹的挥发物成分的种类和含量都有差异.马缨丹的香气成分主要为萜烯类化合物(60%),而马利筋中醛类(33.72%)含量相对高些,烯烃含量约占11%,二者都含有少量的醇.作为蝴蝶的非蜜源植物,缅栀子花的挥发物中有一定量的肟类(24.99%)和腈类(5.34%),在马利筋和马缨丹中均未检测出这2种组分.%Fragrances from the nectar and non-nectar plants of butterfly were closely and circularly head-space sampled within adsorptive tubes, and analyzed by auto thermal-desorption gas chromatography and mass spectrometry (ATD-GC/MS). Results showed that the volatile components of Asclepias curassavica Linn. and Lantana camara were different in variety and coment. Terpenes (60%) were high contained in Lantana camara, and aldehydes (33.72%) were high contained in A. curassavica (24.99%), nitrile (5.34%) were detected in Plumeria rubra Linn. cv. acutifolia, but were not detected in A. curassavica and L. camara.

  2. Kenyan endemic bird species at home in novel ecosystem.

    Science.gov (United States)

    Habel, Jan Christian; Teucher, Mike; Rödder, Dennis; Bleicher, Marie-Therese; Dieckow, Claudia; Wiese, Anja; Fischer, Christina

    2016-04-01

    Riparian thickets of East Africa harbor a large number of endemic animal and plant species, but also provide important ecosystem services for the human being settling along streams. This creates a conflicting situation between nature conservation and land-use activities. Today, most of this former pristine vegetation is highly degraded and became replaced by the invasive exotic Lantana camara shrub species. In this study, we analyze the movement behavior and habitat use of a diverse range of riparian bird species and model the habitat availability of each of these species. We selected the following four riparian bird species: Bare-eyed Thrush Turdus tephronotus, Rufous Chatterer Turdoides rubiginosus, Zanzibar Sombre Greenbul Andropadus importunus insularis, and the Kenyan endemic Hinde's Babbler Turdoides hindei. We collected telemetric data of 14 individuals during a 2 months radio-tracking campaign along the Nzeeu River in southeast Kenya. We found that (1) all four species had similar home-range sizes, all geographically restricted and nearby the river; (2) all species mainly use dense thicket, in particular the invasive L. camara; (3) human settlements were avoided by the bird individuals observed; (4) the birds' movement, indicating foraging behavior, was comparatively slow within thickets, but significantly faster over open, agricultural areas; and (5) habitat suitability models underline the relevance of L. camara as suitable surrogate habitat for all understoreyed bird species, but also show that the clearance of thickets has led to a vanishing of large and interconnected thickets and thus might have negative effects on the population viability in the long run. PMID:27066236

  3. 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

  4. Study in vitro of dental enamel irradiated with a high power diode laser operating at 960 nm: morphological analysis of post-irradiation dental surface and thermal effect analysis in pulp chamber due to laser application

    International Nuclear Information System (INIS)

    Objectives: This study examines the structural and thermal modifications induced in dental enamel under dye assisted diode laser irradiation. The aim of this study is to verify if this laser-assisted treatment is capable to modify the enamel surface by causing fusion of the enamel surface layer. At the same time, the pulpal temperature rise must be kept low enough in order not to cause pulpar necrosis. To achieve this target, it is necessary to determine suitable laser parameters. As is known, fusion of the enamel surface followed by re-solidification produce a more acid resistant layer. This surface treatment is being researched as a new method for caries prevention. Method and Materials: A series of fourteen identically prepared enamel samples of human teeth were irradiated with a high power diode laser operating at 960 nm and using fiber delivery. Prior to irradiation, a fine layer of cromophorous ink was applied to the enamel surface. In the first part of the experiment the best parameter for pulse duration was determined. In the second part of the experimental phase the same energy density was used but with different repetition rates. During irradiation we monitored the temperature rise in the pulpal cavity. The morphology of the treated samples was analysed under SEM. Results: The morphology of the treated samples showed a homogeneously re-solidified enamel layer. The results of the temperature analysis showed a decrease of the pulpal temperature rise with decreasing repetition rate. Conclusion: With the diode laser it is possible to cause morphological alterations of the enamel surface, which is known to increase the enamel resistance against acid attack, and still maintain the temperature rise in the pulpar chamber below damage threshold. (author)

  5. Sistemas ultrasónicos para la irrigación del sistema de conductos radiculares

    Directory of Open Access Journals (Sweden)

    A. García Delgado

    2014-04-01

    Full Text Available La eliminación de los restos de tejido pulpar vital y necrótico y de los microorganismos del sistema de conductos radiculares, es esencial para el éxito en endodoncia. La desinfección del canal radicular mediante la irrigación e instrumentación es el factor más importante en la prevención y tratamiento de la periodontitis apical. Al ser imposible con la instrumentación llegar a todas las áreas del sistema de conductos, la irrigación cobra especial importancia. Por este motivo, en la última década se han desarrollado una serie de sistemas de dispensación y agitación de irrigantes, tales como los ultrasonidos. En concreto, en este artículo de revisión se evalúa la información disponible de los diez últimos años sobre la efectividad de los sistemas ultrasónicos para eliminar bacterias, tejido pulpar, restos de dentina y barrillo dentinario, la capacidad de estos dispositivos para hacer que el irrigante penetre en el sistema de conductos radiculares y la seguridad en su uso. Los resultados de la revisión muestran que los sistemas ultrasónicos son más eficaces en el desbridamiento químico, biológico y físico del sistema de conductos radiculares que los sistemas de irrigación convencional, a la vez que son seguros.

  6. La identidad militar americana en la guerra de Irak, democratización de la tecnología y la representación de la democracia

    Directory of Open Access Journals (Sweden)

    Diego Zavala Scherer

    2008-08-01

    Full Text Available This work addresses the problem of the war experience and itsdocumentary record by the figure of the soldier. In the second war in Iraq the soldiers have been converted into camara photographers and chroniclers of the conflict. Their identity, determined by their condition of participants, changes the poetic representation of documentary; invested with the new audiovisual technology, they are launched to record on behalf of values which we must question the embossing in such films.

  7. Avaliação dos efeitos antitussígenos e expectorantes de duas formulações fitoterápicas existentes no mercado brasileiro

    OpenAIRE

    Bastos de Mello, Fernanda; Braga de Mello, Joao Roberto

    2006-01-01

    Os modelos biológicos de determinação da velocidade de transporte mucociliar em codornas, secreção das vias aéreas em ratos e reflexo da tosse induzido no cobaio foram usados para avaliar os efeitos antitussígenos e expectorantes de duas formulações fitoterápicas. A primeira composta pelo extrato seco de hera (Hedera helix) (Abrilar®), e a segunda de extrato fluido de jucá (Caesalpinea ferrea), agrião (Nasturtium officinale), guaco (Mikania glomerata), cambará (Lantana camara), maracujá (Pass...

  8. Purpose of Introduction as a Predictor of Invasiveness among Introduced Shrubs in Rwanda

    Directory of Open Access Journals (Sweden)

    Jean Leonard Seburanga

    2015-01-01

    Full Text Available The introduced shrub flora in Rwanda was analyzed and the risk of invasion was assessed based on the species’ purposes of introduction. The results showed that more than half of invasive alien shrubs in Rwanda were introduced as ornamentals. They include Agave americana L., Bryophyllum proliferum Bowie ex Hook., Caesalpinia decapetala (Roth Alston, Lantana camara L., and Tithonia diversifolia (Hemsley A. Gray. However, these represented only 3.16% of the total number of introduced ornamental shrubs. At the time when the study was conducted, no introduced food crop had become invasive. Species introduced for purposes other than food or culinary use showed higher likelihood of becoming invasive.

  9. Effect of some botanical materials on certain biological aspects of the house fly, Musca domestica L

    Directory of Open Access Journals (Sweden)

    Nabawy A. I. Elkattan, Khalafalla S. Ahmed, Saadya M. Elbermawy and Rabab

    2011-04-01

    Full Text Available The effects of Lantana camara (leaves, Pelargonium zonale (leaves, Cupressus macrocarpa (leaves, Cyperus rotundus (whole plant and Acacia nilotica (seeds powders on some biological aspects of house fly, M. domestica L. were tested. The effects of three lethal concentrations LC25, LC50 and LC75 on the larval duration, pupation percent, pupal weight, pupal duration, adult emergence percent, sex ratio, adult longevity, and fecundity were determined. The induced malformed larvae, pupae and adults were recorded and photographed. The powders of the five plants were found to have promising effects in controlling this insect.

  10. Los Nuevos Términos Comerciales Internacionales -INCOTERMS- (Versión 2010 Y Su Aplicación En El Derecho Colombiano

    Directory of Open Access Journals (Sweden)

    Maximiliano Rodriguez

    2010-12-01

    Full Text Available Los INCOTERMS constituyen un conjunto de reglas internacionales para la interpretación de los usos comerciales más utilizados en las operaciones de comercio exterior. Este artículo constituye una vision panoramica de la última version de esos Terminos Comerciales, que son recopilados por la Camara de Comercio Internacional de Paris. Igualmente, se encarga de examinar las modificaciones que fueron introducidos en la nueva recopilacion de los terminos y su incidencia tanto dentro del ambito internacional como nacional.

  11. Effect of hydrocarbons and nitrogen oxides on ozone formation in smog chambers exposed to solar irradiance of Mexico City

    Energy Technology Data Exchange (ETDEWEB)

    Sandoval F, J; Marroquin de la R, O; Jaimes L, J. L; Zuniga L, V. A; Gonzalez O, E; Guzman Lopez-Figueroa, F [Instituto Mexicano del Petroleo, Mexico, D.F. (Mexico)

    2001-01-01

    Outdoor smog chambers experiments were performed on air to determine the answer of maximum ozone levels, to changes in the initial hydrocarbons, HC, and nitrogen oxide NO{sub x}. These captive-air experiments under natural irradiation were carried out. Typically, eight chambers were filled with Mexico city air in the morning. In some of those chambers, the initial HC and/or Nox concentrations were varied by {+-}25% to {+-}50% by adding various combinations of a mixture of HC, clean air, or NO{sub x} (perturbed chambers). The O{sub 3} and NO{sub x} concentration in each chamber was monitored throughout the day to determine O{sub 3} (max). The initial HC and NO{sub x} concentration effects were determined by comparing the maximum ozone concentrations measured in the perturbed and unperturbed chambers. Ozone isopleths were constructed from the empirical model obtained of measurements of the eight chambers and plotted in a graph whose axe were the initial HC and NO{sub x} values. For the average initial conditions that were measured in Mexico City, it was found that the most efficient strategy to reduce the maximum concentration of O{sub 3} is the one that reduces NO{sub x}. [Spanish] Se realizaron experimentos de camaras de esmog con el aire de la ciudad de Mexico para determinar las respuestas de los niveles maximos de ozono a los cambios en las concentraciones iniciales de hidrocarburos, HC y oxido de nitrogeno, NO{sub x}. Por lo general, se llenaron 8 bolsas con aire matutino de la Ciudad de Mexico. En algunas camaras, las concentraciones iniciales fueron cambiadas de 25% a 50%, anadiendo varias concentraciones de una mezcla de HC, aire limpio y/o NO{sub x}. La concentracion de O{sub 3} y NO{sub x}, en cada camara, fueron monitoreadas a lo largo del dia para determinar el maximo de O{sub 3}. El efecto de los HC y el NO{sub x} fue determinado por comparacion del maximo de ozono formado en las camaras, que fueron perturbadas por adicion o reduccion de HC y/o Nox

  12. Effects of indole-3-acetic acid on Botrytis cinerea isolates obtained from potted plants.

    Science.gov (United States)

    Martínez, J A; Valdés, R; Gómez-Bellot, M J; Bañón, S

    2011-01-01

    We study the growth of different isolates of Botrytis cinerea collected from potted plants which were affected by Botrytis blight in southern Spain during recent years. These isolates, which show widely phenotypic differences when grown in vitro, are differentially affected by growth temperature, gibberellic acid applications and paclobutrazol, an efficient plant growth retardant and fungicide at the same time. In this work, we have evaluated the effect of the auxin indole-3-acetic acid (IAA) dose (0, 1, 10, and 100 mg/plate) on the growth of the collection of B. cinerea isolates obtained from the following potted plants: Cyclamen persicum, Hydrangea macrophylla, Lantona camara, and Lonicera japonica. B. cinerea produces indolacetic acid, but so far the precise biosynthetic pathway and some effects on this fungal species are still unclear, although recent studies have revealed an antifungal activity of IAA on several fungi, including B. cinerea isolated from harvested fruits. Mycelial growth curves and growth rates assessed from difference in colony areas during the both linear and deceleration phase, conidiation (measured as time of appearance), conidia length (microm), and sclerotia production (number/plate) were evaluated in the isolates, which were grown at 26 degrees C on Petri dishes containing potato dextrose agar for up to 35 days. Mycelial growth curves fitted a typical kinetic equation of fungi grown on solid media. B. cinerea isolates showed a high degree of variability in their growth kinetics, depending on the isolate and auxin dose. This plant growth substance delayed mycelial growth during the linear phase in an isolate-dependent manner, thus isolates from C. persicum, H. macrophylla and L. camara were more affected by IAA than L. japonica. On the other hand, 100 mg of IAA was the critical dose to significantly reduce the growth rate in all isolates and to promote brown-striped hyphae development, especially in isolate from C. persicum. 10 and 100 mg

  13. Fracture resistance and failure pattern of teeth submitted to internal bleaching with 37% carbamide peroxide, with application of different restorative procedures Resistência à fratura e padrão de falha de dentes submetidos ao clareamento interno com peróxido de carbamida a 37%, com aplicação de diferentes procedimentos restauradores

    Directory of Open Access Journals (Sweden)

    Gerson Bonfante

    2006-08-01

    Full Text Available OBJECTIVE: This study investigated the compressive fracture strength and failure pattern in premolars submitted to endodontic treatment and internal bleaching with 37% carbamide peroxide for 21 days, with application of different restorative procedures. MATERIAL AND METHODS: Six groups were employed (n = 10: 1 non-bleached teeth and pulp chamber sealed with IRM; 2 bleached teeth and pulp chamber sealed with IRM; 3 bleached teeth and pulp chamber filled with light cured composite resin; 4 bleached teeth, root canals prepared at 10mm, filling of the root canal and pulp chamber with IRM; 5 bleached teeth, root canals prepared at 10mm, luting of prefabricated metallic post with zinc phosphate and pulp chamber sealed with composite resin; 6 bleached teeth, root canals prepared at 10mm, luting of glass fiber post with resin cement and pulp chamber sealed with composite resin. After 24-hour storage in distilled water, the specimens were submitted to compressive fracture strength testing in a universal testing machine. RESULTS: The following values were found: Group 1 - 56.23kgf; Group 2 - 48.96kgf; Group 3 - 53.99kgf; Group 4 - 45.72kgf; Group 5 - 54.22kgf; Group 6 - 60.12kgf. The analysis of variance did not reveal statistically significant difference between groups (pOBJETIVO: O objetivo do estudo foi investigar a resistência à fratura sob compressão e padrão de falha de pré-molares tratados endodonticamente e clareados internamente por 21 dias com peróxido de carbamida a 37%, aplicando-se diferentes procedimentos restauradores. MATERIAL E MÉTODOS: O objetivo deste estudo foi investigar a resistência à fratura sob compressão e padrão de falha de pré-molares unirradiculares tratados endodonticamente e clareados internamente com peróxido de carbamida a 37%. Foram constituídos 6 grupos (n = 10: 1 dentes sem clareamento e câmara pulpar vedada com IRM; 2 dentes clareados e câmara pulpar vedada com IRM; 3 dentes clareados e câmara pulpar

  14. Modeling of an atomizer for two fluids; Modelacion de un atomizador de dos fluidos

    Energy Technology Data Exchange (ETDEWEB)

    Tapia Ramirez, Zoili [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-09-01

    The work reported in this article presents the results of the effort to improve the basic understanding of the flow structure that is formed in a two fluid sprayer before and after the interaction between the sprayed fluid and the spraying fluid. The images in the interior of the mixing chamber of the atomizer are shown, which were taken with a high velocity video camera. Also the results of the numerical simulation of the internal flow obtained by means of a package of commercial modeling are shown. [Espanol] El trabajo reportado en este articulo presenta los resultados del esfuerzo por mejorar el entendimiento basico de la estructura del flujo que se forma en un atomizador de dos fluidos antes y despues de la interaccion entre el fluido atomizado y el fluido atomizante. Se muestran imagenes del flujo en el interior de la camara de mezclado del atomizador, las cuales fueron tomadas con una camara de video de alta velocidad. Tambien se incluyen los resultados de la simulacion numerica del flujo interno obtenidas por medio de un paquete de modelacion comercial.

  15. Nectar Meals of a Mosquito-Specialist Spider

    Directory of Open Access Journals (Sweden)

    Josiah O. Kuja

    2012-01-01

    Full Text Available Evarcha culicivora, an East African jumping spider, is known for feeding indirectly on vertebrate blood by actively choosing blood-carrying mosquitoes as prey. Using cold-anthrone tests to detect fructose, we demonstrate that E. culicivora also feeds on nectar. Field-collected individuals, found on the plant Lantana camara, tested positive for plant sugar (fructose. In the laboratory, E. culicivora tested positive for fructose after being kept with L. camara or one of another ten plant species (Aloe vera, Clerodendron magnifica, Hamelia patens, Lantana montevideo, Leonotis nepetaefolia, Parthenium hysterophorus, Ricinus communis, Senna didymobotrya, Striga asiatica, and Verbena trivernia. Our findings demonstrate that E. culicivora acquires fructose from its natural diet and can ingest fructose directly from plant nectaries. However, experiments in the laboratory also show that E. culicivora can obtain fructose indirectly by feeding on prey that have fed on fructose, implying a need to consider this possibility when field-collected spiders test positive for fructose. In laboratory tests, 53.5% of 1,215 small juveniles, but only 3.4% of 622 adult E. culicivora, left with plants for 24 hours, were positive for fructose. These findings, along with the field data, suggest that fructose is especially important for early-instar juveniles of E. culicivora.

  16. Presence of two types of flowers with respect to nectar sugar in two gregariously flowering species

    Indian Academy of Sciences (India)

    Chaitali Anand; Chaitrali Umranikar; Pooja Shintre; Anuja Damle; Janhavi Kale; Jahnavi Joshi; Milind Watve

    2007-06-01

    Many species of animal-pollinated flowers are known to vary widely in the nectar content of flowers. Some proportion of flowers in many species is apparently nectarless, and such flowers are believed to be ‘cheaters’. Cheating may explain a part of the variability in nectar content. If cheating exists as a qualitatively different strategy then we expect bimodality in the distribution of nectar content of flowers. It has been shown in a multispecies study that gregarious species have a higher proportion of cheater flowers. We studied the frequency distribution of total nectar sugar in two gregariously flowering species Lantana camara and Utricularia purpurascens, which differed in other floral and ecological characters. At the population level, both the species showed significant bimodality in the total sugar content of flowers. The obvious sources of heterogeneity in the data did not explain bimodality. In Lantana camara, bimodality was observed within flowers of some of the individual plants sampled. In Utricularia purpurascens the proportion of nectarless flowers was more in high-density patches, suggesting that the gregariousness hypothesis may work within a species as well. The results support the hypothesis of cheating as a distinct strategy since two distinct types of flowers were observed in both the species. The effect of density in Utricularia purpurascens also supports the gregariousness hypothesis.

  17. Butterfly diversity as a data base for the development plan of Butterfly Garden at Bosscha Observatory, Lembang, West Java

    Directory of Open Access Journals (Sweden)

    TATI SURYATI SYAMSUDIN SUBAHAR

    2010-01-01

    Full Text Available Subahar TSS, Yuliana A (2010 Butterfly diversity as a data base for the development plan of Butterfly Garden at Bosscha Observatory, Lembang, West Java. Biodiversitas 11: 24-28. Change of land use and the increasing number of visitors to Bosscha area was one factor for the development plan of butterfly garden in the area. The objectives of this research were to examine butterfly diversity and its potential for development plan of butterfly garden. Butterfly diversity and its richness conducted by standard walk methods. Host plant and larval food plant was recorded during butterfly survey. Public perception on the development plan of butterfly garden was examined by questionnaire. The results showed that 26 species of butterfly was found in Bosscha area and Delias belisama belisama was the most dominant species. Public perceptions consider that the development plan of butterfly garden will give benefit to the community; not only providing new insight (40.41%, additional tourism object (23.97% and will gave aesthetical value (17.12%. Twelve local species should be considered for development plan of butterfly garden: Papilio agamemnon, P. demoleus, P. memnon, P. sarpedon, Delias belisama, Eurema hecabe, Danaus chrysippus, Argynis hiperbius, Cethosia penthesilea, Hypolimnas missipus, Melanitis phedima and Euthalia Adonijah. Host plant: Bougainvillea spectabilis, Citrus aurantium, Lantana camara, Macaranga tanarius and food plants: Citrus aurantium, Cosmos caudatus, Eupatorium inulifolium, Gomphrena globosa, Hibiscus rosa-sinensis, Lantana camara, and Tithonia diversifolia.

  18. Characterization of the exradin A18 chamber ionization according to the IEC70631 standards. This work aims at the characterization of the Exradin model (Standard Imaging) A18 ionization chamber, according to the international standard IEC 607311. Intends to use the camera Exradin A18 for the quality control of a linear accelerator VARIAN model TrueBeam with capacity to produce beams of photons of high energy, unfiltered flatter (in later FFF) with high dose absorbed by pulse rate, why is verified, according to the mentioned standard IEC 60731, even under conditions of high dose absorbed by pulse rate, the efficiency of ion collection from this camera is within tolerances; Caracterizacion de la camara de ionizacion exradin A18 segun el estandar IEC70631. Estudio para haces de fotones sin filtro aplanador

    Energy Technology Data Exchange (ETDEWEB)

    Onses Segarra, A.; Puxeu Vaque, J.; Sancho Kolster, I.; Lizuain Arroyo, M. C.; Picon Olmos, C.

    2013-07-01

    This work aims at the characterization of the Exradin model (Standard Imaging) A18 ionization chamber, according to the international standard IEC 607311. Intends to use the camera Exradin A18 for the quality control of a linear accelerator VARIAN model TrueBeam with capacity to produce beams of photons of high energy, unfiltered flatter (in later FFF) with high dose absorbed by pulse rate, why is verified, according to the mentioned standard IEC 60731, even under conditions of high dose absorbed by pulse rate, the efficiency of ion collection from this camera is within tolerances. (Author)

  19. Retention proposal in complex cavities. Propuesta de retención en cavidades complejas.

    Directory of Open Access Journals (Sweden)

    Aracelis Navarro Sánchez

    Full Text Available Background: Dental Operatory is the main structure in which Odontology lies. It is not an easy discipline that gives enjoyable results with little effort due to the difficulties that a correct reconstruction of a destroyed dental element offers.The frequency with which pulpar injury occurs while anchoring additional retainers in complex cavities, the technical difficulties the lack of these devices cause and the need to simplify dental procedures lead this study to show the advantages to substitute additional retainers for a retainer surcus. Method: An observational descriptive study was applied to 53 patients(42% of the universe , sample which was selected by means of a simple randomized sample . From a proximal-occlusal cavity, the preparations were extended in a box-like shape towards the bucal or lingual region and the additional retainers were substituted for a surcus which was performed in the gingival wall of the preparation. Calcium Hydroxide of rapid dryness was used as a cavity cover and Policarboxilate cement as a base; then the amalgam restoration was performed. The number of restorations were studied taking into account the patient´s age and the failures due to fractures of amalgam, loss of vitality and periapical changes were assessed taking into consideration the patient´s age and a one- year follow up. Results: Most of the amalgam restorations were performed in patients aged from 35 to 59 years and the relative frequencies due to fractures of amalgam, loss of vitality and periapical changes were very low. Conclusion: The substitution of additional retainers for a retainer surcus in complex cavities of vital molars showed to be advantageous because it guarantees a less degree of pulpar damage and less pulpar damage.
    Fundamento : La operatoria dental, estructura fundamental sobre la cual descansa la odontología, no es una

  20. Estudo morfológico da polpa de molares de ratos Wistar frente a uma oclusão traumática experimental Morphological study of the pulp of Wistar rats molars under experimental occlusal interference

    Directory of Open Access Journals (Sweden)

    Luiz Alberto Plácido PENNA

    2000-06-01

    Full Text Available As alterações morfológicas pulpares, decorrentes de um estímulo externo experimental (interferência oclusal, foram estudadas, em nível de microscopia de luz. Utilizaram-se restaurações de amálgama, em sobreoclusão nos primeiros molares superiores direitos de dez ratos Wistar, divididos em 3 grupos e sacrificados por perfusão transcardíaca com formol a 10%, aos 10, 20 e 30 dias. A avaliação foi feita nos molares inferiores direitos (lado experimental e esquerdos (lado controle. As peças ósseas após descalcificação em solução de EDTA associada às microondas, seguiram técnica histológica de rotina e coloração por hematoxilina-eosina e tricrômico de Mallory. Verificou-se no lado controle uma reação intensa caracterizada por um posicionamento atípico dos odontoblastos, seguida pelo aparecimento de cálculos pulpares e posteriormente por uma aparente e uniforme acomodação tecidual em toda a polpa, com moderada incidência de fibras colágenas. No lado experimental, as alterações foram similares parecendo, porém, aumentar com o tempo, principalmente aos 30 dias, onde a imagem histológica era semelhante à do lado controle aos 10 dias. Os resultados obtidos permitiram concluir que a interferência oclusal provocou alterações no tecido conjuntivo pulpar tanto no lado experimental como no controle e que as mesmas foram proporcionais à direção dos movimentos mandibulares.Pulpal morphological alterations in mandibular molars of rats, resulting from an experimental external stimulus (occlusal interference, were studied using light microscopy. We placed amalgam restorations in supraocclusion in the right superior first molars of 10 Wistar rats divided into three groups, which were sacrificed by transcardiac perfusion with 10% formalin, after 10, 20 and 30 days. The evaluation of the right (experimental side and left (control side inferior molars was made after decalcification of the bony specimens with EDTA solution

  1. ANÁLISIS DESCRIPTIVO DE LA RESPUESTA DEL COMPLEJO PULPO-DENTINAL DE ÓRGANOS DENTALES DE UNA POBLACIÓN PREHISPÁNICA CAZADORA-RECOLECTORA

    Directory of Open Access Journals (Sweden)

    María Clemencia Vargas Vargas

    2011-12-01

    un color amarillo, las superficies oclusales e incisales se presentan lisas. Ninguna de las piezas dentarias presentó signos clínicos de caries. Respecto al examen radiográfico, los datos obtenidos confirmaron los hallazgos clínicos. Conclusiones: El desgaste dental es la característica clínica que más se presentó, posiblemente asociado al consumo de alimentos fibrosos y a la fuerza imprimida en la acción masticatoria, además es agravado por partículas abrasivas que se adherían a los alimentos, durante la maceración con elementos líticos. Las estructuras dentales más afectadas por el desgaste dental corresponden al esmalte y a la dentina. En este estudio no se encontró un porcentaje relevante de casos de exposición pulpar por desgaste dental, a pesar que la edad aproximada y la esperanza de vida al nacer era de más o menos 35 años. Posiblemente la exposición pulpar no se daba, gracias a la producción de dentina secundaria que esclerosaba las cámaras pulpares.

  2. Casca de arroz e palhada de soja na compostagem de carcaças de frangos de corte = Rice husks and soy straw as substrate for composting of broiler carcasses

    Directory of Open Access Journals (Sweden)

    Paulo Giovanni de Abreu

    2011-01-01

    Full Text Available Avaliou-se a atuacao da casca de arroz e da palhada de soja como substrato para compostagem de carcaca de frangos de corte, observando a degradacao dos dois substratos e das carcacas pelo monitoramento da temperatura, peso das carcacas e dos substratos e analise fisicoquimica do produto final. As camaras foram montadas com carcacas de 10 aves recem abatidas, com quatro repeticoes no tempo. Instalou-se em cada camara um termopar para registro da temperatura. O substrato e as carcacas foram pesadas separadamente, no inicio, aos 15 e aos 30 dias de compostagem. Ao final de cada periodo, foram realizadas analises fisico-quimica de amostras de cada camara, avaliando-se o pH e os teores de materia seca, cinzas, P, N, K, Cu, Zn, Mn, Fe e carbono organico. Concluiu-se que a palhada de soja pode ser usada como alternativa para substrato de compostagem de carcacas de aves, atendendo a relacao C/N exigida pela legislacao ao final da terceira reutilizacao. A casca de arroz, da mesma forma, pode ser utilizada na compostagem de carcacas de aves, porem reutilizada por maior numero de vezes. A decomposicao das carcacas foi significativamente maior, em percentual, na palhada de soja aofinal do quarto periodo de compostagem (p „Tƒn0,05.The performance of rice husks and of soy straw were evaluated as substrate for on-farm poultry carcass composting, observing the degradation of the two substrate and of the carcasses through monitoring the temperature, weight of the carcasses and of the substrate and physiochemical analysis of the final product. The piles were arranged with carcasses of 10 recently slaughtered birds, with four repetitions in time. A thermo pair was installed in each pile to register the temperature. The substrate and the carcasses were weighed separately, in the beginning, day 15 and day 30 of composting. At the end of each period, the physiochemical analysis of samples were made from each pile, evaluating the pH, the dry material, ashes, P, N

  3. Repellent plants provide affordable natural screening to prevent mosquito house entry in tropical rural settings--results from a pilot efficacy study.

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    Frank C Mng'ong'o

    Full Text Available Sustained malaria control is underway using a combination of vector control, prompt diagnosis and treatment of malaria cases. Progress is excellent, but for long-term control, low-cost, sustainable tools that supplement existing control programs are needed. Conventional vector control tools such as indoor residual spraying and house screening are highly effective, but difficult to deliver in rural areas. Therefore, an additional means of reducing mosquito house entry was evaluated: the screening of mosquito house entry points by planting the tall and densely foliated repellent plant Lantana camara L. around houses. A pilot efficacy study was performed in Kagera Region, Tanzania in an area of high seasonal malaria transmission, where consenting families within the study village planted L. camara (Lantana around their homes and were responsible for maintaining the plants. Questionnaire data on house design, socioeconomic status, malaria prevention knowledge, attitude and practices was collected from 231 houses with Lantana planted around them 90 houses without repellent plants. Mosquitoes were collected using CDC Light Traps between September 2008 and July 2009. Data were analysed with generalised negative binomial regression, controlling for the effect of sampling period. Indoor catches of mosquitoes in houses with Lantana were compared using the Incidence Rate Ratio (IRR relative to houses without plants in an adjusted analysis. There were 56% fewer Anopheles gambiae s.s. (IRR 0.44, 95% CI 0.28-0.68, p<0.0001; 83% fewer Anopheles funestus s.s. (IRR 0.17, 95% CI 0.09-0.32, p<0.0001, and 50% fewer mosquitoes of any kind (IRR 0.50, 95% CI 0.38-0.67, p<0.0001 in houses with Lantana relative to controls. House screening using Lantana reduced indoor densities of malaria vectors and nuisance mosquitoes with broad community acceptance. Providing sufficient plants for one home costs US $1.50 including maintenance and labour costs, (30 cents per person. L

  4. Pulpite crônica hiperplásica: análise histológica ao microscópio de luz e microscópio eletrônico de transmissão = Chronic hyperplastic pulpitis: histological analysis in light microscope and transmission electron microscope

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    Moura, Camilla Christian Gomes

    2006-01-01

    Full Text Available Este estudo analisou as características morfológicas de pólipos pulpares de adultos jovens ao microscópio de luz (ML e ao microscópio eletrônico de transmissão (MET. Foram analisados 5 pólipos de primeiros molares, que foram removidos e fixados em glutaraldeído 2,5%. Após a fixação, cada pólipo foi dividido em duas metades, uma foi processada para inclusão em glicol metacrilato e a outra para inclusão em resina epóxica. Os cortes histológicos com 3 μm de espessura foram corados em azul de toluidina e analisados ao ML e os cortes com 80 nm foram contrastados em citrato de chumbo e acetato de uranila e analisados ao MET. Ao ML foi observado epitélio espesso não queratinizado com alguns mastócitos na camada basal. O conjuntivo apresentou infiltrado inflamatório crônico, com ninhos de plasmócitos e vasos neoformados. A análise ao MET mostrou células epiteliais da camada basal com núcleo ovóide, citoplasma com muitos ribossomas livres, mitocôndrias e poucos feixes de tonofilamentos. A lâmina basal apresentou-se nítida com muitos hemidesmossomas. Na camada espinhosa observou-se células grandes, núcleos com cromatina descondensada e nucléolos evidentes. No citoplasma foi observado muitos feixes de tonofilamentos, muitas mitocôndrias, ribossomas livres e muitos desmossomas. No conjuntivo observou-se macrófagos, mastócitos e plasmócitos na região adjacente ao epitélio. Nas regiões mais profundas predominavam fibroblastos entres feixes de fibrilas colágenas, vasos sangüíneos com células endoteliais proeminentes e pericitos associados. Os resultados confirmaram que o epitélio do pólipo pulpar apresenta características morfológicas semelhantes ao da mucosa oral humana. O conjuntivo mostrou características de inflamação crônica de intensidade variada

  5. Importance of bacterial endotoxin (LPS in endodontics A importância da endotoxina bacteriana (LPS na endodontia atual

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    Mario Roberto Leonardo

    2004-06-01

    Full Text Available New knowledge of the structure and biological activity of endotoxins (LPS has revolutionized concepts concerning their mechanisms of action and forms of inactivation. Since the 1980's, technological advances in microbiological culture and identification have shown that anaerobic microorganisms, especially Gram-negative, predominate in root canals of teeth with pulp necrosis and radiographically visible chronic periapical lesions. Gram-negative bacteria not only have different factors of virulence and generate sub-products that are toxic to apical and periapical tissues, as also contain endotoxin (LPS on their cell wall. This is especially important because endotoxin is released during multiplication or bacterial death, causing a series of biological effects that lead to an inflammatory reaction and resorption of mineralized tissues. Thus, due to the role of endotoxin in the pathogenesis of periapical lesions, we reviewed the literature concerning the biological activity of endotoxin and the relevance of its inactivation during treatment of teeth with pulp necrosis and chronic periapical lesion.O conhecimento mais aprofundado sobre a estrutura e atividade biológica das endotoxinas (LPS revolucionou os conceitos sobre seu mecanismo de ação e formas de inativação. A partir da década de 80, os avanços tecnológicos na cultura e identificação microbiológica demonstraram que, em canais radiculares de dentes portadores de necrose pulpar e lesão periapical crônica, visível radiograficamente, predominam microrganismos anaeróbios, particularmente os gram-negativos. Como se sabe, os microrganismos gram-negativos, além de possuírem diferentes fatores de virulência e gerarem produtos e sub-produtos tóxicos aos tecidos apicais e periapicais, contêm endotoxina em sua parede celular. Esse conhecimento é particularmente importante, uma vez que a endotoxina é liberada durante a multiplicação ou morte bacteriana, exercendo uma série de

  6. Avaliação da variação de pH e da permeabilidade da dentina cervical em dentes submetidos ao tratamento clareador

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    Dezotti Mariela S. G.

    2002-01-01

    Full Text Available A reabsorção cervical externa da raiz é uma das desvantagens do procedimento clareador. Vários são os mecanismos que podem ser responsáveis por desencadear esta reabsorção, dentre eles, a ação química e física dos materiais utilizados, bem como a morfologia da junção amelocementária. Este trabalho teve como objetivo observar uma possível via de comunicação entre a câmara pulpar e a superfície externa da raiz, medindo o pH e a infiltração de corante na dentina cervical após o procedimento clareador. Realizou-se o tratamento endodôntico em 34 dentes incisivos permanentes. Os dentes foram divididos em 3 grupos experimentais de acordo com o nível do corte da obturação e selamento da embocadura dos canais com cimento de ionômero de vidro. O clareamento foi realizado usando perborato de sódio e peróxido de hidrogênio a 30%. As leituras do pH foram realizadas após 30 min, 24 h, 48 h e 72 h do início do procedimento. A seguir, os dentes foram imersos em fucsina básica a 0,5% por 24 h para determinarmos possíveis diferenças na permeabilidade da dentina cervical. Os resultados mostraram que o pH apresentou tendência a se modificar quando o corte da obturação permaneceu na embocadura dos canais, bem como quando se removeram 2 mm da obturação e quando se selou a embocadura com cimento de ionômero de vidro. A permeabilidade dentinária aumentou nos 3 grupos experimentais, em comparação com os dentes que compreenderam o grupo controle. Estas leves diferenças podem sugerir uma via de comunicação entre a câmara pulpar e a superfície externa da raiz.

  7. Avaliação do tratamento endodôntico em radiografias periapicais e panorâmicas Evaluation of endodontic treatment with periapical and panoramic radiography

    Directory of Open Access Journals (Sweden)

    Cristina Maria Dumit SEWELL

    1999-07-01

    Full Text Available Radiografias periapicais e panorâmicas, com aparelho elipsopantomográfico, são comparadas na avaliação do tratamento endodôntico. Com este objetivo, radiografias realizadas nestas duas técnicas, num mesmo paciente, com pelo menos um dente com tratamento endodôntico, foram analisadas por três examinadores, levando-se em consideração as condições apicais (lesões periapicais, a obturação do canal radicular (tipo de material, preenchimento e limite apical, a restauração do dente e o preenchimento da câmara pulpar. Os resultados mostram que a radiografia periapical define melhor a presença de rarefação óssea periapical difusa, obturação do canal radicular com guta-percha, tratamento endodôntico inadequado, justaposição do material restaurador inadequada para a região anterior e a presença de restauração metálica fundida na região posterior. Para os demais itens avaliados, os resultados da análise estatística não são significantes. A concordância de diagnósticos entre examinadores se mostra superior nas radiografias periapicais.Periapical and panoramic radiography with a ellipsopantomograph device, are compared in the evaluation of endodontic treatment. With this objective, radiographies carried out under both techniques with the same patient having at least one tooth endodontically treated, were analysed by three observers, taking into consideration the apical conditions (periapical lesions, the root canal filling (material type, filling and apical level, tooth restoration and filling of the pulpar camera. The results demonstrated that periapical radiography is a better way to define the appearance of difuse periapical bone rarefaction, root canal filling with gutta-percha, insatisfactory endodontic treatment, an inadequate juxtaposition of the restoration material to the anterior region, and the presence of metallic casted restorations in the posterior region. Other result evaluations were not significant. The

  8. Empleo racional de la coronectomía en la extracción de terceros molares incluidos Rational application of coronectomy when treating lower impacted third molar

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    C. Recio Lora

    2009-08-01

    Full Text Available Los terceros molares son los dientes que, con más frecuencia, sufren el fracaso de su erupción y quedan incluidos o retenidos dentro de los maxilares. Un gran porcentaje de nuestros pacientes presentan los cordales incluidos y, de ellos, una parte importante se acompaña de patología que hace aconsejable su tratamiento quirúrgico. La técnica de la coronectomía aplicada al tercer molar incluido fue descrita por primera vez por Ecuyer y Debien en 1984 como la eliminación parcial de dicho diente, dejando deliberadamente parte de su raíz en el interior de la mandíbula. Fue propuesta para evitar la lesión del nervio dentario inferior (NDI en aquéllos casos en los que existía una íntima relación entre ambas estructuras anatómicas. Aunque el objetivo de la técnica es muy claro, no está libre de controversia, ya que el cirujano debe valorar la posibilidad de una complicación infecciosa de origen pulpar. Presentamos un caso clínico exitoso de esta técnica, junto al análisis de la postura ante la técnica de los distintos autores, así como sus ventajas e inconvenientes.Third molars are the teeth that most frequently fail to erupt and remain impacted or retained inside the bone. A large percentage of our patients have impacted wisdom teeth and many of these patients also have pathologies that require surgical treatment. Applied coronectomy technique of the impacted third molar was first described by Ecuyer and Debien in 1984. The described it as partial elimination of the tooth in question, deliberately leaving part of the root inside the bone. This was proposed to avoid injuring the inferior dental nerve in cases where there was a close relationship between the two anatomical structures. Although the objective of the procedure is very clear, it is still controversial. Therefore, the surgeon should evaluate the possibility of an infectious complication of pulpar origin. We present the successful clinical case that uses this technique

  9. Operation of blast furnace gas (BFG) gas holder with ld gas (LDG); Operacao do gasometro de gas de alto forno com gas de aciaria

    Energy Technology Data Exchange (ETDEWEB)

    Sampaio, William Genelhu; Valentino, Waldir Smith [Usinas Siderurgicas de Minas Gerais S/A (USIMINAS), Ipatinga, MG (Brazil)

    2010-07-01

    The Intendente Camara plant, one of USIMINAS steel works, located in Ipatinga - MG, operates its network of process gases with two Coke-Oven Gas (COG) oil-seal gas holders, one Blast Furnace Gas (BFG) oil-seal gas holder and a LD gas (LDG) telescope type gas holder. During the repair of LDG gas holder, this gas would be completely burned in the flares for a period of five months. Due to this loss, the cost of additional fuel and interventions in the production rhythm of the Hot Strip Mill, its biggest consumer, would be high. This paper presents the philosophy and pillars that mitigated these losses, highlighting how it was possible to operate the BFG gas holder with LDG, the achieved economy and lessons learned from the process. (author)

  10. Characterization of a triboelectric x-ray spectrum

    Energy Technology Data Exchange (ETDEWEB)

    Moya-Sanchez, E. Ulises; Romo-Espejel, J. A.; Aceves-Aldrete, F. J. [Departamento de Fisica, CUCEI, Universidad de Guadalajara (Mexico)

    2012-10-23

    Low-energy X-ray imaging system has been useful in medical diagnostic in order to obtain high contrast in soft tissue. Recently, Camara et al. and most recently Hird et al. have produced low-energy X-rays using a triboelectric effect. The main aim of this work is to characterize the penetration (beam quality) of a triboelectric X-ray source in terms of the computed Half Value Layer (HVL). Additionally, the computed HVL of the triboelectric X-ray source has been compared with the HVL of X-ray tube Mo-anode (Apogee 5000). According to our computations the triboelectric X-ray source has a similar penetration such as a X-ray tube source.

  11. Correla\\c{c}\\~ao de longa-dura\\c{c}\\~ao e anal\\'ise bayesiana da evolu\\c{c}\\~ao temporal dos terremotos ao longo da falha de samambaia, nordeste do brasil

    CERN Document Server

    de Freitas, D B; Pereira, L L S; Pedro, L S; Atanazio, M G N; Vilar, C S

    2013-01-01

    A Bayesian approach is adopted to analyze the sequence of seismic events and their magnitudes near Jo\\~ao C\\^amara which occurred mainly from 1983 to 1998 along the Samambaia fault. In this work, we choose a Bayesian model for the process of occurrence times conditional on the observed magnitude values following the same procedure suggested by Stavrakakis and Tselentis (1987). The model parameters are determined on the basis of historical and physical information. We generate posterior samples from the joint posterior distribution of the model parameters by using a variant of the Metropolis-Hastings algorithm. We use the results in a variety of ways, including the construction of pointwise posterior confidence bands for the conditional intensity of the point process as a function of time, as well as, a posterior distribuition as a function of the mean of occurrence per unit time.

  12. Integrated approach for understanding spatio-temporal changes in forest resource distribution in the central Himalaya

    Institute of Scientific and Technical Information of China (English)

    A K Joshi; P K Joshi; T Chauhan; Brijmohan Bairwa

    2014-01-01

    Intense anthropogenic exploitation has altered distribution of forest resources. This change was analyzed using visual interpretation of satellite data of 1979, 1999 and 2009. Field and interactive social surveys were conducted to identify spatial trends in forest degradation and data were mapped on forest cover and land use maps. Perceptions of villagers were compiled in a pictorial representation to understand changes in forest resource distribution in central Himalaya from 1970 to 2010. For-ested areas were subject to degradation and isolation due to loss of con-necting forest stands. Species like Lantana camara and Eupatorium adenophorum invaded forest landscapes. Intensity of human pressure differed by forest type and elevation. An integrated approach is needed to monitor forest resource distribution and disturbance.

  13. Invasion establishment and habitat suitability of Chromolaena odorata (L. King and Robinson over time and space in the western Himalayan forests of India

    Directory of Open Access Journals (Sweden)

    Gautam Mandal

    2014-12-01

    Full Text Available Habitat suitability assessment of the invasive species Chromolaena odorata (L. King and Robinson from Himalayan forests reveals some interesting findings and conclusions. At different study sites, 29 of 72 species were exotic and invasive and comprised 21 genera and eight families. Indigenous species accounted for 59% of the total species and comprised 26 genera and 11 families. Perennials outnumbered the annuals in all study sites. Chromolaena odorata and Lantana camara L. were the only invasive species that were common to all sites with high importance value index values. The present work reveals that sites with high biotic pressure, maximum temperature variation, open forest canopy, and free from herbivory are the most suitable habitat for the growth of C. odorata. An elevated level of phosphorus, potassium, magnesium, soil organic matter, and nitrogen and acidic soil in all invaded sites are possible reasons for further invasion of C. odorata.

  14. Aspects environnementaux en Amérique latine

    OpenAIRE

    Artigas, Rafael Cámara; Batle, José Ramón Martinez; Hinnewinkel, Jean-Claude; Mainet, Guy; Mainet, Hélène; Mietton, Michel; Olmo, Fernando Diaz del; Plantin, Corinne; Salomon, Jean-Noël; Salomon, Jean‑Noël

    2012-01-01

    Le numéro 246 des Cahiers d’Outre-Mer aborde les questions du développement durable en Amérique centrale sous l’angle d’une étude des causes de la fin de la civilisation maya (J.N. Salomon) ; de l’écologie des savanes (définitions, limites et contacts avec les forêts tropicales) (R. Camara Artigas) ; des modifications climatiques (augmentation des températures surtout dans la mer Caraïbe et cyclones, évènements climatiques tropicaux extrêmes) étudiées à travers l’analyse hydro-géomorphologiqu...

  15. EFFECTIVENESS OF GLYPHOSATE AND 2.4 D AMIN HERBICIDES TO CONTROL WEEDS UNDER Shorea selanica Bl. PLANTATION IN CARITA TRIAL GARDEN, BANTEN

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    Ari Wibowo

    2007-03-01

    Full Text Available A trial was carried out in Carita, West Java, to identify the effectiveness of Glyphosate and 2.4 D Amin Herbicide to control weeds under Shorea selanica Bl. plantation. The trial was conducted through the application of Glyphosate and 2.4 D Amin Herbicide with dosages of 5, 6, 7, 8 and 9 liter per ha and compared with Glyphosate herbicide 5 liter per ha, manual treatment, and control (no treatment. The result showed that Glyphosate and 2.4 D Amin Herbicide could be used to control weeds in order to maintaining S. selanica Bl. plantation. Minimum dosage of 6 liter/ha was effective to control weeds such as Chromolaena odorata DC, Mikania micrantha Will, Lantana camara L, Imperata cylindrica Beauv., Melastoma malabathricum L, and Boreria latifolia Bl. Furthermore, there was no symptom of poison on S. selanica Bl. plantation after herbicide application with all dosages applied.

  16. Torrefaction of invasive alien plants: Influence of heating rate and other conversion parameters on mass yield and higher heating value.

    Science.gov (United States)

    Mundike, Jhonnah; Collard, François-Xavier; Görgens, Johann F

    2016-06-01

    With the aim of controlling their proliferation, two invasive alien plants, Lantana camara (LC) and Mimosa pigra (MP), both widespread in Africa, were considered for torrefaction for renewable energy applications. Using thermogravimetric analysis, the influence of heating rate (HR: 2.18-19.82°Cmin(-1)) together with variable temperature and hold time on char yield and HHV (in a bomb calorimeter) were determined. Statistically significant effects of HR on HHV with optima at 10.5°Cmin(-1) for LC and 20°Cmin(-1) for MP were obtained. Increases of HHV up to 0.8MJkg(-1) or energy yield greater than 10%, together with a 3-fold reduction in torrefaction conversion time could be achieved by optimisation of HR. Analysis of the torrefaction volatiles by TG-MS showed that not only hemicelluloses, but also lignin conversion, could influence the optimum HR value.

  17. EKSPLORASI DAN PRODUKTIFITAS PADANG PENGGEMBALAAN DI KECAMATAN PAMONA TIMUR KABUPATEN POSO SULAWESI TENGAH

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    P.D.M.H. Karti

    2015-06-01

    Full Text Available Pasture in District of East Pamona, Poso Regency has potential as forage for livestock.. This study was conducted in two villages (Didiri and Kelei to explore of plant species as feed and productivity calculation such as botanical composition and carrying capacities. Type of grasses that grow are Sporobolus sp, Paspalum sp, Paspalum cartilagineum, Axonopus compresus, Euleusine indica. Type of legumes that grow are Stylosanthes guianensis, Desmodium sp, Centrocema pubescens, Callyandra callothyrsus, Leucaena leucocephala. Types of weeds have started to grow in several locations within the region, such as Melastoma, Mimosa pudica, Imperata cylindrica, Cromolena odorata, Cyperacea, and Lamtana camara. Botanical composition (% in Kelei for grass, legumes, weeds (84.76: 6.75: 8:49 and Didiri for grass, legumes, weeds (95.34: 0:51: 4.15. Carrying Capacities in Kelei and Didiri was 0.96 ± 0:23 and 1:12 ± 0:29 ST / ha.

  18. Torrefaction of invasive alien plants: Influence of heating rate and other conversion parameters on mass yield and higher heating value.

    Science.gov (United States)

    Mundike, Jhonnah; Collard, François-Xavier; Görgens, Johann F

    2016-06-01

    With the aim of controlling their proliferation, two invasive alien plants, Lantana camara (LC) and Mimosa pigra (MP), both widespread in Africa, were considered for torrefaction for renewable energy applications. Using thermogravimetric analysis, the influence of heating rate (HR: 2.18-19.82°Cmin(-1)) together with variable temperature and hold time on char yield and HHV (in a bomb calorimeter) were determined. Statistically significant effects of HR on HHV with optima at 10.5°Cmin(-1) for LC and 20°Cmin(-1) for MP were obtained. Increases of HHV up to 0.8MJkg(-1) or energy yield greater than 10%, together with a 3-fold reduction in torrefaction conversion time could be achieved by optimisation of HR. Analysis of the torrefaction volatiles by TG-MS showed that not only hemicelluloses, but also lignin conversion, could influence the optimum HR value. PMID:26954309

  19. IN VITRO SCREENING OF SELECTED PLANT EXTRACTS AGAINST Alternaria alternata

    Directory of Open Access Journals (Sweden)

    Gargi Singh

    2014-07-01

    Full Text Available Alternaria alternata has been responsible for causing leaf spot diseases in various host species. Methanolic extracts of six selected plant leaves viz Parthenium hysterophorus, Vernonia amygdalina, Eucalyptus camaldulensis, Nerium oleander, Lantana camara and Ocimum sanctum were in vitro screened for their antifungal activity against A. alternata at 5, 10 and 20% concentrations. Highest reduction in mycelial growth was achieved by Oleander followed by Parthenium, Ocimum, Lantana, Vernonia and Eucalyptus, respectively. Thin Layer Chromatography (TLC was carried out by using solvent system of Toluene: Ethyl acetate: Formic acid (3:1:2 to separate the compounds responsible for antifungal activity. Phytochemical analysis of leaf extracts revealed the presence of Alkaloids, Terpenoids, Phenols, Saponins and Tannins at various concentrations.

  20. Mechanistic investigation in ultrasound induced enhancement of enzymatic hydrolysis of invasive biomass species.

    Science.gov (United States)

    Borah, Arup Jyoti; Agarwal, Mayank; Poudyal, Manisha; Goyal, Arun; Moholkar, Vijayanand S

    2016-08-01

    This study has assessed four invasive weeds, viz. Saccharum spontaneum (SS), Mikania micrantha (MM), Lantana camara (LC) and Eichhornia crassipes (EC) for enzymatic hydrolysis prior to bioalcohol fermentation. Enzymatic hydrolysis of pretreated biomasses of weeds has been conducted with mechanical agitation and sonication under constant (non-optimum) conditions. Profiles of total reducible sugar release have been fitted to HCH-1 model of enzymatic hydrolysis using Genetic Algorithm. Trends in parameters of this model reveal physical mechanism of ultrasound-induced enhancement of enzymatic hydrolysis. Sonication accelerates hydrolysis kinetics by ∼10-fold. This effect is contributed by several causes, attributed to intense micro-convection generated during sonication: (1) increase in reaction velocity, (2) increase in enzyme-substrate affinity, (3) reduction in product inhibition, and (4) enhancement of enzyme activity due to conformational changes in its secondary structure. Enhancement effect of sonication is revealed to be independent of conditions of enzymatic hydrolysis - whether optimum or non-optimum. PMID:26898160

  1. Analysis of vegetation dynamics and phytodiversity from three dry deciduous forests of Doon Valley, Western Himalaya, India

    Directory of Open Access Journals (Sweden)

    Gautam Mandal

    2014-09-01

    Full Text Available The present study aimed to analyze the vegetation dynamics and plant diversity from the dry deciduous forests of Doon Valley. Species richness, regeneration, and change in community composition of these forests were studied and change was noticed with Shorea robusta as the main dominant species, and Mallotus philippensis, Syzygium cumini, and Ehretia laevis as codominant tree species in all communities. The highest species richness and diversity rates were found to be increased with the decrease in tree density and basal area. The high Importance Value Index recorded in Thano (>150 indicates that the S. robusta forest is progressing toward the culmination stage, whereas the lower IVI values (100 and 150 in the other two sites (Selaqui – Jhajra and Asarori signify the heavy disturbance of these sites and further establishment of alien invasive species such as Cassia tora, Cassia occidentalis, Lantana camara, Urena lobata, Ipomoea carnea, Sida acuta, and Solanum torvum.

  2. Toxicity of Ag decorated ZnO nanomaterials to Daphnia magna

    OpenAIRE

    Azevedo, Carla Sofia Leite

    2015-01-01

    A nanotecnologia é uma área em crescimento e os nanomateriais (NMs) podem ser encontrados numa vasta variedade de produtos como equipamentos ou dispositivos médicos e cosméticos. Os NMs atraem muita atenção devido à sua grande reatividade, resultado da sua elevada área de superfície em relação ao seu volume. Eles podem apresentar diferentes composições químicas, tamanhos e formas, o que pode influenciar o seu comportamento. Devido ao aumento de produção e presença em bens de consumo, os NM...

  3. Efeitos de nanopartículas de prata e pesticidas organoclorados em macrófagos peritoneais de camundongo

    OpenAIRE

    Pessotto, Andressa Glinski

    2013-01-01

    Resumo: A nanotecnologia vem ocupando um lugar de destaque na economia e na ciência, devido às propriedades benéficas de nanomateriais em campos industriais, farmacêuticos e médicos. No entanto, estudos têm mostrado que as nanopartículas apresentam riscos para os organismos, devido às suas propriedades pró-oxidantes e capacidade para adsorver vários produtos químicos. Por conseguinte, o objetivo do presente estudo foi avaliar os efeitos de nanopartículas de prata, pesticidas organoclorados e ...

  4. Otimização da desidratação osmótica e secagem do Yacon (Polymnia sonchifolia)

    OpenAIRE

    Kotovicz, Valesca

    2011-01-01

    Resumo: O yacon (Polymnia sonchifolia) é uma raíz tuberosa com propriedades funcionais devido aos carboidratos de reserva que o compõem, especificamente, as cadeias de frutooligossacarídeos (FOS). Devido ao seu elevado teor de água, em média 90%, o yacon é suscetível a uma rápida degradação e a uma vida útil de aproximadamente sete dias. Uma alternativa para manter o yacon próprio para consumo por maior período, conservando suas propriedades, é realizar a sua desidratação. Visando a obtenção ...

  5. Previsão da perda de solo na Fazenda Canchim - SP (EMBRAPA) utilizando geoprocessamento e o USLE 2D Loss of soil determination in Fazenda Canchim - SP (EMBRAPA) using geographic information systems and USLE 2D

    OpenAIRE

    Fernando das Graças Braga da Silva; Ricardo Tezini Minotti; Francisco Lombardi Neto; Odo Primavesi; Silvio Crestana

    2010-01-01

    Os modelos hidrossedimentológicos têm enorme potencial no Brasil para ser a melhor ferramenta de estimativa de perda de solo, devido principalmente a sua complexidade na descrição dos processos e sua robustez que os fundamenta. Entretanto, devido à necessidade de uma quantidade muito grande de informações requerida, aliada a dificuldades de adaptações desses modelos internacionais e necessidade de tempo e estrutura para criação de modelos nacionais, a Equação Universal de Perda de Solo (EUPS)...

  6. Comparações sazonais do efeito da Xylella fastidiosa em cultivares de cafeeiro Seasonal comparactions of Xylella fastidiosa effect in coffee cultivars

    OpenAIRE

    Rachel Benetti Queiroz-Voltan; Luciane Perosin Cabral; Osvaldo Paradela Filho

    2004-01-01

    Há muitos anos, o cafeeiro vem apresentando problemas de atrofia e seca dos ramos, atribuídos a um esgotamento nutricional devido às altas taxas de produção. Entretanto, hoje sabe-se que esse problema é causado pela presença da bactéria Xylella fastidiosa Wells et al. cujos sintomas estão relacionados a fatores de estresse. Embora essa bactéria tenha sido muito estudada nos Estados Unidos, devido aos danos causados à videira, pouco se conhece sobre a relação patógeno-hospedeiro-vetor nas dife...

  7. Mobilidade suave e a bicicleta

    OpenAIRE

    Peixoto, Cátia Liane Correia

    2014-01-01

    A mobilidade suave surge devido aos desafios que as sociedades vêm sentindo ao longo dos últimos anos. Devido à dispersão urbana e às inúmeras deslocações diárias que são feitas maioritariamente por transportes motorizados, principalmente o veículo individual, este cenário veio levantar preocupações a diversos níveis, como ambientais, territoriais, económicos, sociais e de saúde. Neste sentido e para promover o uso da bicicleta, a Associação Nacional das Indústrias das Duas Rodas, Ferragen...

  8. Produção de cianotoxinas em meio limitado em nutrientes e acção alelopática em organismos de dois níveis tróficos

    OpenAIRE

    Figueiredo, Daniela Rebelo de

    2003-01-01

    O aumento da eutrofização nos sistemas hídricos superficiais devido à intensificação das actividades antropogénicas e às alterações climáticas (aumento da temperatura e luminosidade) tem favorecido o aparecimento de blooms (ou florescências) superficiais de cianobactérias. Estes blooms são potencialmente perigosos devido à capacidade de várias estirpes cianobacterianas produzirem toxinas nocivas para diversos grupos de organismos, desde bactérias até humanos. A microcistina,...

  9. Influência da cavidade oral na performance desportiva

    OpenAIRE

    Moura, Luís Miguel Garcia da Rosa

    2016-01-01

    A influência da cavidade oral na performance desportiva é um tema atual e crescendo em importância. Devido a uma sociedade cada vez mais especializada e competitiva a procura de formas que produzam vantagens perante os concorrentes é cada vez maior. A cavidade oral, devido à sua importância e papel em relação ao organismo como um todo, tem o potencial de provocar alterações sistémicas que melhoram o rendimento do atleta. Neste trabalho de revisão bibliográfica pretendeu-se (1) reunir as in...

  10. Implementação da análise de metais em biodiesel por ICP-OES

    OpenAIRE

    Santos, Isabel Maria da Silva

    2009-01-01

    A quantificação de elementos metálicos em biodiesel adequire importância, devido ao facto de alguns metais, mesmo em baixas concentrações (μg/g), poderem afectar o desempenho dos motores, diminuir a estabilidade do biodiesel, causar problemas de corrosão, envenenamento de catalisadores e causar possíveis contaminações do ambiente durante o transporte. Devido ao seu processo de fabrico, alguns metais como sódio, potássio, cálcio e magnésio podem estar presentes em amostras de...

  11. Modelagem por redes neurais do sistema biológico do tratamento de efluentes em refinarias de petróleo

    OpenAIRE

    Teixeira, Alexandre Casagrande

    2013-01-01

    Resumo: A necessidade de preservação do meio ambiente tem direcionado atenção do setor industrial às unidades de tratamento de efluentes. Dentre as diversas tecnologias existentes, o tratamento biológico por lodos ativados é uma das mais utilizadas, devido a sua excelente robustez. Na indústria do petróleo, não é diferente, devido principalmente a sua elevada eficiência na remoção de nitrogênio amoniacal. No entanto, a eficiência desta tecnologia está diretamente relacionada com a qualidade d...

  12. Avaliação do uso de agregados miúdos reciclados de concreto em concretos betuminosos usinados a quente

    OpenAIRE

    Lobo, Adriana Verchai de Lima

    2013-01-01

    Resumo: O futuro da pavimentação inevitavelmente envolverá o uso de materiais reciclados. Esta tendência de sustentabilidade é devido ao impacto ambiental positivo que agregados reciclados têm quando utilizados em pavimentação devido à grande demanda de agregados para este tipo de construção. Os agregados reciclados podem ser utilizados em misturas asfálticas como revestimento ou em bases e subbases. O objetivo desta pesquisa é avaliar o uso do agregado reciclado de concreto miúdo (ARCm) em C...

  13. Metal phytoremediation potential of naturally growing plants on fly ash dumpsite of Patratu thermal power station, Jharkhand, India.

    Science.gov (United States)

    Pandey, Shikha Kumari; Bhattacharya, Tanushree; Chakraborty, Sukalyan

    2016-01-01

    Three naturally growing plants Ipomoea carnea, Lantana camara, and Solanum surattense were found in fly ash dumpsite of Patratu thermal power station, Jharkhand, India. They were assessed for their metal uptake potential. The fly ash was slightly alkaline with very less nitrogen and organic carbon but enriched with phosphorus and heavy metals. Lantana camara and Ipomoea carnea showed good translocation from root to shoot for most of the metals except Mn and Pb. The order of metal accumulation in stem of both the plants were Fe(205mg/kg)>Mn(65mg/kg)>Cu(22.35mg/kg)>Pb(6.6mg/kg)>Cr(3.05mg/kg)>Ni(1 mg/kg)>Cd(0.5 mg/kg) and Fe(741 mg/kg)>Mn(154.05 mg/kg)>Cu(20.75 mg/kg)>Pb(6.75 mg/kg)>Ni(4.0 mg/kg)>Cr(3.3mg/kg)>Cd(0.05mg/kg), respectively. But Solanum surattense accumulated most of the metals in roots. The order was in the following order, Mn (382.2mg/kg) >Fe (264.1mg/kg) > Cu (25.35mg/kg) >Pb (5.95 mg/kg) > Ni (1.9 mg/kg) > Cr (1.8mg/kg) > Cd (0.55 mg/kg). The order of Bioconcentration factor (BCF) in root and shoot followed almost the same order as, Mn>Fe>Ni>Pb>Cu>Cr≈ Cd in all the three species. ANOVA showed significant variation in metal accumulation by root and stem between the species. Finally, it can be concluded that Solanum surattense can be used as phytostabilizer and other two species as phytoextractor of metal for fly ash dumpsite reclamation.

  14. Saving 50% of energy in air conditioning and refrigeration; 50% de ahorro de energia en aire acondicionado y refrigeracion

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez De la Fuente, Rodolfo Javier [Instituto para la Proteccion Ambiental de Nuevo Leon-CAINTRA, Nuevo Leon (Mexico); Bolado Tamez, Jaime Antonio [Industrias AlEn S. A. de C. V., Monterrey (Mexico)

    1998-12-31

    Due to the fact that the air conditioning systems represent up to 70% of the energy consumption in our buildings, to the constant raise of the electric tariffs and to the increment of temperatures in Nuevo Leon State, as well as the restrictions on the use of some refrigerant fluids because of its potential damage to the ozone layer (Montreal Protocol) and the preferential use of refrigerants with low global heating potential (Kioto Protocol). The Camara de la Industria de la Transformacion de Nuevo Leon (Nuevo Leon`s Transformation Industry Chamber) through the Instituto para la Proteccion Ambiental de Nuevo Leon (Nuevo Leon`s Institute for Environmental Protection), create the program ECO-REFRIGERATION whose three missions are: Increase the efficiency of air conditioning and refrigeration equipment, promote the substitution of refrigerants and extend the benefits of these projects to the community in general. [Espanol] Debido a que los sistemas de climatizacion representan hasta el 70% de consumo energetico en nuestros inmuebles, al constante incremento de las tarifas electricas, el incremento de las temperaturas en Nuevo Leon, asi como la restriccion del uso de algunos refrigerantes por su potencial de dano de la capa de ozono (Protocolo de Montreal) y el uso preferente de refrigerantes con bajo potencial de calentamiento global (Protocolo de Kioto), la Camara de la Industria de la Transformacion de Nuevo Leon a traves del Instituto para la Proteccion Ambiental de Nuevo Leon crean el Programa ECO-REFRIGERACION cuyas tres misiones son: Incrementar la eficiencia de los equipos de aire acondicionado y refrigeracion, promover la sustitucion de refrigerantes y extender los beneficios de este proyecto a la comunidad en general.

  15. Integral energy policy; Politica energetica integral

    Energy Technology Data Exchange (ETDEWEB)

    Bazan Navarrete, Gerardo [Programa Universitario de Energia, Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

    2006-11-15

    The guidelines of energy policy are normative directions that govern the energy sector and its relations with different objects, these guidelines must be in agreement with the national objectives so that they collaborate to its accomplishment. Camara Nacional de la Industria y Trasnformacion (CANACINTRA) and the University Program of Energy made a diagnosis and long term prospective of the Energy Sector. With the design of five possible growth scenarios to year 2030 the total demand of energy required for the 2030 was calculated with the purpose of determining the mixture of the primary energy sources to satisfy the projected demand. With such data a decalogue of recommendations was formulated that appeal for better policies of organization and action, promotions and forecasts to obtain an optimal national performance, competitive at international level. [Spanish] Los lineamientos de politica energetica son orientaciones normativas que rigen el sector energetico y sus relaciones con distintos objetos, estos lineamientos deben estar a tono con los objetivos nacionales de modo que colaboren a su realizacion. Camara Nacional de la Industria de Transformacion (CANACINTRA) y el Programa Universitario de Energia realizaron un diagnostico y prospectiva a largo plazo del sector energia. Con el diseno de cinco posibles escenarios de crecimiento al 2030 se calculo la demanda total de energia requerida para el 2030 con el fin de determinar la mezcla de energeticos primarios para satisfacer la demanda proyectada. Con tales datos se conformo un decalogo de recomendaciones que apelan a mejores politicas de organizacion y accion, fomentos y previsiones para lograr un optimo desempeno energetico nacional, competitivo a nivel internacional.

  16. Longitudinal evaluation of Ocimum and other plants effects on the feeding behavioral response of mosquitoes (Diptera: Culicidae in the field in Tanzania

    Directory of Open Access Journals (Sweden)

    Tenu Filemoni

    2008-10-01

    Full Text Available Abstract Background The use of repellent materials from plants against nuisance insects is common with great potential to compliment existing malaria control programmes and this requires evaluation in the field. Ocimum plant species, Ocimum suave (Willd and O. kilimandscharicum (Guerke materials and their essential oils extracted by steam distillation were evaluated in the field and experimental huts for repellence, exophily and feeding inhibition effects against three mosquito species, Anopheles arabiensis (Patton, An. gambiae ss (Giles and Culex quinquefasciatus (Say. The protective effect of essential oils from Ocimum plants were compared with N, N-diethly-3- methylbenzamide (DEET, a standard synthetic repellent. Also, the protective effect of fumigation by burning of repellent plants; Ocimum suave, Ocimum kilimandscharicum, Azadirachta indica, Eucalyptus globules and Lantana camara were tested in experimental huts and selected local houses. Results In the field, protection by Ocimum plants from mosquito bites was high and there was small variation among different mosquito species. Protection efficiency was 93.4%, 91.98% and 89.75% for An. arabiensis while for Cx. quinquefaciatus it was 91.30%, 88.65% and 90.50% for DEET, Ocimum suave and O. kilimandscharicum respectively. In the experimental hut, deterrence induced by burning of Ocimum and other plants ranged from 73.1.0% to 81.9% for An. arabiensis and 56.5% to 67.8% for Cx. quinquefaciatus, while feeding inhibition was 61.1% to 100% for An. arabiensis and 50% to 100% for Cx. quinquefaciatus. Evaluations under field conditions confirmed high protective efficacy, enhanced feeding inhibition and house entry inhibition (Deterrence. Conclusion This study shows the potential of Ocimum suave and Ocimum kilimandscharicum crude extracts and whole plants of Ocimum suave, Ocimum kilimandscharicum, Azadirachta indica, Eucalyptus globules and Lantana camara for use in protecting against human biting

  17. O conceito de reabsorções dentárias ou As reabsorções dentárias não são multifatoriais, nem complexas, controvertidas ou polêmicas! The concept of root resorptions: root resorptions are not multifactorial, complex, controversial or polemical!

    Directory of Open Access Journals (Sweden)

    Alberto Consolaro

    2011-08-01

    Full Text Available Os mecanismos das reabsorções dentárias são conhecidos e suas causas bem definidas. Clinicamente são assintomáticas e não induzem alterações pulpares, periapicais e periodontais, sendo geralmente consequências delas. As reabsorções dentárias são alterações locais e adquiridas e não representam manifestações dentárias de doenças sistêmicas. As reabsorções dentárias ocorrem quando as estruturas de proteção dos dentes em relação à remodelação óssea são eliminados, especialmente os cementoblastos e restos epiteliais de Malassez.The mechanisms of root resorptions are known, and their causes are well defined. They are clinically asymptomatic and do not induce pulp, periapical or periodontal changes; rather, they are usually consequences of these phenomena. Root resorptions are local and acquired defects, and not dental signs of systemic diseases. Root resorptions occur when structures that protect teeth from bone remodeling, particularly cementoblasts and epithelial rests of Malassez, are eliminated.

  18. Granuloma periapical: tratamiento convencional. Reporte de un caso

    Directory of Open Access Journals (Sweden)

    Natalia Patricia Harris Ortega

    2014-03-01

    Full Text Available Title: Periapical granuloma: conventional treatment. Case reportLos Granulomas radiculares son lesiones periapicales crónicas, consideradas secuelas directas de procesos infecciosos resultantes de la necrosis pulpar, extendiéndose hacia la región perirradicular. Los granulomas se pueden presentar por fallas en los tejidos duros, resultantes de caries, fracturas y procedimientos quirúrgicos. Se realizó tratamiento de endodoncia convencional con preparación invertida a paciente de 15 años con diagnóstico de Granuloma periapical (periodontitis apical asintomáticay su posterior recuperación de la lesión de órgano dentario 36. (DUAZARY 2013 No. 2, 141 - 144AbstractRoot granulomas are chronic periapical lesions, considered direct sequels of infectious processes resulting from pulp necrosis, extending into the periradicular region. The granulomas can occur due to failures in hard tissues, resulting from caries, fractures and surgical procedures. A conventional endodontic treatment was done with crown down technique in a patient of 15 years old with a diagnosis of periapical granuloma (chronic nonsuppurative apical periodontitis and subsequent recovery from injury in tooth 36.Keywords: periapical granuloma; periapical periodontitis (MESH Database.

  19. Sensibilidad dentaria Dental sensibility

    Directory of Open Access Journals (Sweden)

    P Tortolini

    2003-10-01

    Full Text Available La sensibilidad dentaria l es un problema común que se presenta entre el 9 y el 30% de la población adulta. La teoría hidrodinámica es aceptada como uno de los mecanismos de inducción de la respuesta pulpar dolorosa, debido a que los estímulos provocan el movimiento del fluido y para ello es necesario que la dentina este expuesta y que los túbulos dentinarios estén abiertos y permeables a la pulpa. Es fundamental realizar el diagnostico diferencial con otras causas de dolor dental e identificar los factores etiológicos y predisponentes.Dental sensitivity is a common problem and it affect 9 and 30% the adult poblation. The hidrodynamyc theory is cited as the menchanism of induction of a painful pulpal response and implies that stimuli tranmission across dentine increase the rate of fluid flow through dentinal tubules and for this to accur the dentinal tubules must be opened andpermeable to the pulp. An appropiate tretametn needs a diferential diagnosis eith other causes of dental pain and the identification of predisponing etiologic factors.

  20. On persistently positively expansive maps

    Directory of Open Access Journals (Sweden)

    Alexander Arbieto

    2010-06-01

    Full Text Available In this paper, we prove that any C¹-persistently positively expansive map is expanding. This improves a result due to Sakai (Sakai 2004.Neste artigo, mostramos que todo mapa C¹-persistentemente positivamente expansivo e expansor. Isto melhora um resultado devido a Sakai (Sakai 2004.

  1. Efeitos da eletroestimulação e da facilitação neuromuscular proprioceptiva na marcha de hemiparéticos = Effects of electric stimulation and proprioceptive neurofunctional facilitation on the gait of hemiparetics

    Directory of Open Access Journals (Sweden)

    Mileski, Maria Eliane

    2013-01-01

    Conclusão: Desta forma, ponderamos que o uso de PNF em concomitância com FES trouxe benefícios devido ao aumento da mobilidade em um período em que não se esperaria mais ganhos funcionais em pacientes com hemiparesia espástica

  2. Perspectives on research and development of microbial fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Ortega-Martinez, A.; Vazquez Larios, A.L.; Solorza-Feria, O.; Poggi Varaldo, H.M. [Centro de Investigacion y de Estudios Avanzados del IPN, Mexico D.F. (Mexico)]. E-mail: hectorpoggi2001@gmail.com; rareli@hotmail.com

    2009-09-15

    Microbial fuel cells (MFC), is an anoxic electrochemical bioreactor where bacteria grow in the absence of oxygen in a chamber containing an anode which it may be covered by a biofilm. Microorganisms anoxically oxidize the organic substrate and electrons generated are released to the anode. Released protons are transferred to the cathode. Natural or forced aeration of the cathode supplies the oxygen for the final reaction 2H{sup +} + 2e{sup -} + (1/2) O{sub 2} = H{sub 2}O. In this work, we present a critical review on MFC focused on subjects that are receiving a growing interest from the research and technological communities: (i) types of MFC, their relative advantages and disadvantages and ranges of application; (ii) development of biocathodes; (iii) enrichment procedures of microbial communities in MFC. Recent research shows that one-chamber fitted with cathode aerated by natural aeration, and other special types of high performance MFC, have displaced the historical two-chamber MFC. Recent studies showed that electrochemically active bacteria (EAB) can be successfully enriched in MFC. The cost and eventual poisoning of the platinum catalyst used at the cathode is a major limitation to MFC application and economic viability. Researchers have started working on the concept of biocathodes that would use bacteria instead of platinum as a biocatalyst. Microbial enrichment of inocula seeded to MFC may provide a way to enrich the consortium with EAB, thus substantially increasing the transfer of electrons to the anode. Bioaugmentation of consortia in MFC with strains EAB, could contribute to the same goal. [Spanish] Las celdas de combustible microbianas (CCM) son un biorrector anoxico donde las bacterias crecen en ausencia de oxigeno en una camara que contiene un anodo que puede cubrirse con una biopelicula. Los microorganismos oxidan onoxicamente el sustrato organico y los electrones generados se liberan al anodo. Los protones liberados se transfieren al catodo. La

  3. Manejo clínico de la resorción dental interna utilizando agregad o trióxido mineral como material de obturación intracanal

    Directory of Open Access Journals (Sweden)

    Alvaro Francisco Negrete Barbosa

    2013-10-01

    Full Text Available ResumenLa resorción dental interna es una patología poco común, asintomática, que por lo general es detectada accidentalmente en una radiografía de rutina; su etiología es desconocida pero se cree que puede ser producida por trauma, persistencia de una pulpitis crónica, aparatología ortodóntica, entre otras causas. Aunque esta patología es poco frecuente, el endodoncista no puede pasar por alto el conocimiento de esta y mucho menos su tratamiento, ya que de este, depende que la patología se detenga o siga avanzando, debido a que la acción resortiva está ligada a cierto grado de vitalidad pulpar; después de la eliminación del tejido pulpar en órganos dentarios con este tipo de patología, se debe pensar que material es el ideal para poder obturar la cavidad de forma elíptica o redondeada que origina este tipo de resorción. Desde la salida del MTA (agregado trióxido mineral ya hace tiempo, este asume múltiples usos en la práctica endodontica, debido a sus grandes ventajas y propiedades en comparación con otros materiales presentes en el mercado, es por esto que se convierte en un material de elección para la obturaciónde estas cavidades de tipo resortivo, junto con una copiosa irrigación con hipoclorito de sodio y la conformación biomecánica de los conductos. En el siguiente artículo mostraremos el manejo clínico de un premolar superior con dos conductos subobturados y una resorción dental interna, en el cual se utiliza agregado trióxido mineral como material obturador intracanal. (DUAZARY 2010, 239 - 246Palabras clave: Diente premolar; endodoncia; resorción dentaria; obturación del conducto radicular; MTA.AbstractThe internal dental resorption is a rare disease, asymptomatic, which is usually detected accidentally on a radiograph routine; its etiology is unknown but is believed to be produced trauma, persistent chronic pulpits, orthodontic, among other causes. Although this condition is rare, the endodontist

  4. Calcium hydroxide: study based on scientific evidences Hidróxido de cálcio: estudo baseado em evidências científicas

    Directory of Open Access Journals (Sweden)

    Carlos Estrela

    2003-12-01

    Full Text Available The characteristics of calcium hydroxide come from its dissociation into calcium and hydroxyl ions. The action of these ions on tissues and bacteria explains the biological and antimicrobial properties of this substance. Under the conditions of this retrospective of literature, based on scientific evidences, it is possible to state that: 1. Dentin is considered the best pulpal protective, and calcium hydroxide has proved, through numerous studies, its capability of inducing the formation of a mineralized bridge over pulpal tissue. 2. It is necessary, whenever possible, to provide time for calcium hydroxide paste to manifest its potential of action on the microorganisms present in endodontic infections. The maintenance of a high concentration of hydroxyl ions can change bacteria enzymatic activity and promote its inactivation. 3. The site of action of hydroxyl ions of calcium hydroxide includes the enzymes in the cytoplasmic membrane. This medication has a large scope of action, and therefore is effective on a wide range of microorganisms, regardless their metabolic capability. In microbial world, cytoplasmic membranes are similar, irrespective from microorganisms morphological, tinctorial and respiratory characteristics, which means that this medication has a similar effect on aerobic, anaerobic, Gram-positive and Gram-negative bacteria. 4. Calcium hydroxide as temporary dressing used between appointments promotes better results on the periapical healing process than the treatment in one appointment.As características do hidróxido de cálcio se desenvolvem a partir da dissociação em íons cálcio e hidroxila. A ação desses íons nos tecidos e bactérias explica as características biológicas e antimicrobianas dessa substância. Por meio desta retrospectiva da literatura, baseada em evidências científicas, é possível afirmar que: 1. A dentina é considerada a melhor proteção pulpar, e o hidróxido de cálcio provou, através de

  5. [Diabetes mellitus and its influence on the success of endodontic treatment: a retrospective clinical study].

    Science.gov (United States)

    Ferreira, Manuel Marques; Carrilho, Eunice; Carrilho, Francisco

    2014-01-01

    Introdução: A diabetes mellitus é uma doença endócrina onde estão envolvidas as hormonas produzidas pelos ilhéus de Langerhans. A diabetes mellitus pode afetar várias funções do sistema imunitário do indivíduo, predispondo-o para a inflamação crónica, degradação progressiva dos tecidos e diminuição da reparação tecidular. Das alterações provocadas por esta doença ao nível da cavidade oralpode-se destacar a xerostomia, disgeusia, alterações periodontais, aumento da suscetibilidade à infeção e alterações tanto ao nível da polpa dentária como nos tecidos periapicais.Objetivos: O objetivo deste trabalho é avaliar a influência da diabetes mellitus ao nível dos tecidos periapicais e no sucesso dos tratamentos endodônticos nestes doentes.Material e Métodos: Foram analisados 737 casos clínicos tratados na consulta da Área de Medicina Dentária, a que foram feitos tratamentos endodônticos não cirúrgicos, entre os anos de 2003 e 2012. Destes foram selecionados os doentes com diabetes mellitus, num total de 32, dos quais 23 se dispuseram a vir à consulta e a participar neste estudo. Os dados recolhidos foram analisados no software Statistical Package for the Social Sciences, versão 19, a um nível de significância de 5%.Resultados: Foram avaliados 37 dentes no grupo teste e 25 no grupo controlo. Para os parâmetros analisados relativos ao diagnóstico pulpar, mobilidade, presença de fístula, dor à percussão horizontal e vertical, avaliação da restauração definitiva e intervalo de tempo entre a consulta de obturação e a restauração definitiva e/ou a consulta de controlo, não foram verificadas diferenças estatisticamente significativas (p > 0,05). Em relação à avaliação do sucesso dos tratamentos endodônticos realizados, este foi de 62% nogrupo de teste e de 80% no grupo controlo (p > 0,05).Conclusões: Os resultados deste estudo não são conclusivos em relação ao aumento da prevalência da periodontite

  6. Evaluation of accessory furcation canals of permanent mandibular molars using radiography and clearing = Avaliação do canal cavo-interradicular em molares inferiores permanentes através de Rx e diafanização

    Directory of Open Access Journals (Sweden)

    Harb, Leandro José Corrêa

    2010-01-01

    Full Text Available Objetivo: Avaliar a presença do canal cavo-interradicular em molares inferiores permanentes através de radiografias e diafanização. Metodologia: A amostra foi constituída por 344 molares inferiores re-hidratados, preparados e armazenados individualmente em recipientes de vidro. A presença do canal cavo-interradicular foi investigada por um único operador treinado usando lupa (4x para as radiografias e microscópio óptico odontológico (30x para as amostras diafanizadas. Microscopia eletrônica de varredura (MEV foi usada para verificar diferenças morfológicas do assoalho pulpar. Resultados: A análise radiográfica mostrou que 9% das amostras tinham uma zona levemente radiolúcida, 2% mostravam uma imagem sugestiva, e 89% das amostras não tinham nenhuma evidência. Pela diafanização, o canal não foi encontrado nas amostras avaliadas. Pela MEV, as amostras recém extraídas mostraram com canalículos dentinários uniformes; as demais apresentaram pequenos sítios com canalículos uniformes. Conclusão: O exame radiográfico não foi o melhor método de diagnóstico; a diafanização é um excelente método avaliativo, pois permite a visualização tridimensional da anatomia interna dental em pesquisas in vitro

  7. La endodoncia en los pacientes mayores

    Directory of Open Access Journals (Sweden)

    B. Martín Biedma

    2015-06-01

    Full Text Available La endodoncia en el paciente geriátrico es un procedimiento cada vez más habitual en la clínica odontológica. Debemos, dadas las características médicas y dentales de muchos de estos pacientes mayores, planificar correctamente los procesos instrumentales y prever las posibles dificultades que puedan surgir motivadas por conductos estrechos, cámaras pulpares calcificadas etc. En la instrumentación de estos dientes, someteremos a los instrumentos a alto estrés por torsión, motivado por la amplia superficie de contacto entre el instrumento y las paredes, por lo que será totalmente necesario la realización de una preinstrumentación rotatoria y consideramos que es una buena opción el uso del movimiento recíproco. La preparación de los conductos debe dejar un remanente dentinario suficiente, mantenimiento del foramen apical y conicidad progresiva que facilita la administración de irrigantes a lo largo de la longitud de los conductos y las fuerzas de condensación para la obturación. Como irrigantes utilizamos, de forma general, el hipoclorito de sodio al 5% a lo largo de toda la fase instrumental; y una combinación del hipoclorito con un quelante durante la irrigación preobturación que activaremos con algún dispositivo ultrasónico o de aspiración apical negativa. La obturación la realizaremos con sistemas termoplásticos que nos aportan el mejor sellado tridimensional del sistema de conductos.

  8. Compósito de colágeno com silicato e hidroxiapatita como material para endodontia: preparação e caracterização = Collagen composite with silicate and hydroxyapatite as endodontic material: preparation and characterization

    Directory of Open Access Journals (Sweden)

    E'Gues, Miguel Antônio Menezes

    2008-01-01

    Full Text Available Objetivo: Este trabalho teve por objetivo preparar e caracterizar um novo compósito de colágeno com silicato e hidroxiapatita que possa vir a ser utilizado como material endodôntico em capeamento pulpar direto e em pulpotomia. Metodologia: Os materiais utilizados como matéria-prima foram colágeno do tipo I na forma aniônica, silicato (cimento Portland Branco e hidroxiapatita sintetizada. Estes materiais foram misturados em proporções variadas de modo a obter um material compósito na forma de pasta. Os materiais obtidos foram caracterizados por técnicas de calorimetria exploratória diferencial, termogravimetria, microscopia eletrônica de varredura (MEV, espectrometria de dispersão de energia de Raios-X e espectroscopia na região do infravermelho. Resultados: A presença de colágeno no compósito foi demonstrada por transições térmicas típicas daquelas encontradas para o colágeno do tipo I (∼48ºC, independentemente da proporção utilizada, e também por imagens de MEV, onde as fibras colagênicas também puderam ser observadas interligando as partículas de silicato. A composição química de todos compósitos de colágeno foi praticamente idêntica à do silicato utilizado. Conclusão: Os resultados mostraram que a estrutura da matriz de colágeno nos compósitos testados não foi alterada. Esta é uma característica importante para a utilização em endodontia do material compósito proposto, objetivando uma reparação tecidual de forma "mais natural"

  9. Tres casos de odontomas

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    Salvador Javier Santos Medina

    2015-03-01

    Full Text Available Los odontomas son los tumores odontogénicos más comunes, casi siempre se diagnostican accidentalmente, en exámenes radiográficos; pueden sospecharse al retardar el brote dentario o producir maloclusiones. Se clasifican en odontomas compuestos y complejos, ambos constituidos por estructuras dentales como: esmalte, dentina, cemento y tejido pulpar. Su eliminación quirúrgica y la biopsia es el tratamiento de elección. El propósito de este trabajo es reportar tres casos de pacientes atendidos en el Hospital Pediátrico de Las Tunas, todos remitidos previamente por el ortodoncista. El primero, tipo compuesto, en un escolar de 9 años de edad, masculino, asociado a un 31 retenido; el segundo caso se trata de un gran odontoma complejo en una escolar de 11 años de edad, femenina, que produjo interferencia en el brote del 11 y el tercero compuesto; en un escolar de 10 años, masculino, en la línea media entre 11 y 21, con producción de diastema y brote del 12 por palatino. De ellos uno fue descubierto por un examen radiográfico de rutina y los otros dos sospechados por la maloclusión secundaria; todos se trataron quirúrgicamente. Estos casos demuestran la frecuencia de estos tumores en la cavidad bucal y la importancia de la realización de exámenes clínicos y radiográficos para su detección y tratamiento precoz, así como la importancia de la interrelación entre el ortodoncista y el maxilofacial en la resolución satisfactoria de esta entidad

  10. DESCRIÇÃO HISTOLÓGICA DOS INCISIVOS DA CUTIA Dasyprocta prymnolopha (Wagler, 1831

    Directory of Open Access Journals (Sweden)

    Weber Leal de Moura

    2006-10-01

    Full Text Available Esse trabalho objetivou descrever a histologia do dente e do periodonto de cutia. Utilizaram-se dez exemplares de Dasyprocta prymnolopha, desconsiderando idade e sexo. Realizado o processamento histológico clássico, o esmalte e o cemento desintegraram-se na descalcificação, evidenciando-se que o cemento apresenta uma quantidade de tecido mineralizado maior que a dentina. Na dentina, observaram-se túbulos dentinários, estriações paralelas, flexíveis, sinuosas e perpendiculares ao eixo maior do dente, presentes em maior quantidade na região próxima à pré-dentina. A dentina foi classificada em peritubular, intertubular e interglobular, além da pré-dentina, delgada porção não mineralizada. Os odontoblastos mostraram-se acidófilos, paralelos, dispostos ‘’em paliçada’’, ocupando o espaço entre a dentina e a polpa. A polpa apresentou tecido conjuntivo frouxo bastante vascularizado e inervado, cujas células predominantes foram fibroblastos de aspecto estrelado e fusiforme com longos prolongamentos citoplasmáticos. O periodonto mostrou cemento, ligamento periodontal e osso alveolar. O ligamento foi classificado em inferior (conjuntivo denso e superior (conjuntivo frouxo com o primeiro apresentando áreas globulares provenientes da comunicação do osso alveolar e o segundo um epitélio juncional pseudo-estratificado. As fibras de Sharpey partiam do ligamento, inserindo-se no osso alveolar,cujas lamelas formariam delgadas trabéculas e de osso compacto formado pelos sistemas de Havers. PALAVRAS-CHAVE: Dente, dentino-pulpar, Dasyprocta periodonto.

  11. Larvicidal and repellent activity of medicinal plant extracts from Eastern Ghats of South India against malaria and filariasis vectors

    Institute of Scientific and Technical Information of China (English)

    Chinnaperumal Kamaraj; Abdul Abdul Rahuman; Asokan Bagavan; Gandhi Elango; Abdul Abduz Zahir; Thirunavukkarasu Santhoshkumar

    2011-01-01

    Objective:To evaluate the larvicidal and repellent activities of ethyl acetate and methanol extracts ofAcacia concinna (A. concinna),Cassia siamea(C. siamea),Coriandrum sativum (C. sativum),Cuminum cyminum(C. cyminum),Lantana camara (L. camara),Nelumbo nucifera (N. nucifera)Phyllanthus amarus (P. amarus),Piper nigrum (P. nigrum) andTrachyspermum ammi(T. ammi) againstAnopheles stephensi(An. stephensi) andCulex quinquefasciatus (Cx. quinquefasciatus).Methods:The larvicidal activity of medicinal plant extracts were tested against early fourth-instar larvae of malaria and filariasis vectors. The mortality was observed 24 h and48 h after treatment, data were subjected to probit analysis to determine the lethal concentrations (LC50 andLC90) to kill50 and 90per cent of the treated larvae of the tested species. The repellent efficacy was determined against two mosquito species at five concentrations (31.25, 62.50, 125.00, 250.00, and 500.00 ppm) under the laboratory conditions.Results: All plant extracts showed moderate effects after24h and 48h of exposure; however, the highest activity was observed after24h in the leaf methanol extract ofN. nucifera, seed ethyl acetate and methanol extract ofP. nigrumagainst the larvae of An. stephensi(LC50 =34.76, 24.54 and30.20 ppm) and againstCx. quinquefasciatus (LC50= 37.49, 43.94 and57.39ppm), respectively. The toxic effect of leaf methanol extract ofC. siamea, seed methanol extract ofC. cyminum, leaf ethyl acetate extract ofN. nucifera, leaf ethyl acetate and methanol extract ofP. amarusand seed methanol extract ofT. ammiwere showed100% mortality againstAn. stephensi andCx. quinquefasciatus after48 h exposer. The maximum repellent activity was observed at500 ppm in methanol extracts ofN. nucifera, ethyl acetate and methanol extract ofP. nigrum and methanol extract ofT. ammi and the mean complete protection time ranged from30 to150 min with the different extracts tested. Conclusions:These results suggest that the leaf and seed

  12. Effect of discriminative plant-sugar feeding on the survival and fecundity of Anopheles gambiae

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    Jackson Robert R

    2007-08-01

    Full Text Available Abstract Background A previous study showed for Anopheles gambiae s.s. a gradation of feeding preference on common plant species growing in a malaria holoendemic area in western Kenya. The present follow-up study determines whether there is a relationship between the mosquito's preferences and its survival and fecundity. Methods Groups of mosquitoes were separately given ad libitum opportunity to feed on five of the more preferred plant species (Hamelia patens, Parthenium hysterophorus, Ricinus communis, Senna didymobotrya, and Tecoma stans and one of the less preferred species (Lantana camara. The mosquitoes were monitored daily for survival. Sugar solution (glucose 6% and water were used as controls. In addition, the fecundity of mosquitoes on each plant after (i only one blood meal (number of eggs oviposited, and (ii after three consecutive blood meals (proportion of females ovipositing, number of eggs oviposited and hatchability of eggs, was determined. The composition and concentration of sugar in the fed-on parts of each plant species were determined using gas chromatography. Using SAS statistical package, tests for significant difference of the fitness values between mosquitoes exposed to different plant species were conducted. Results and Conclusion Anopheles gambiae that had fed on four of the five more preferred plant species (T. stans, S. didymobotrya, R. communis and H. patens, but not P. hysterophorus lived longer and laid more eggs after one blood meal, when compared with An. gambiae that had fed on the least preferred plant species L. camara. When given three consecutive blood-meals, the percentage of females that oviposited, but not the number of eggs laid, was significantly higher for mosquitoes that had previously fed on the four more preferred plant species. Total sugar concentration in the preferred plant parts was significantly correlated with survival and with the proportion of females that laid eggs. This effect was

  13. Nanopartículas de Eu (III) fluorescentes: biosondas imagiológicas

    OpenAIRE

    Marques, Inês Filipa Jorge Reis

    2013-01-01

    Tese de mestrado em Bioquímica, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013 A nanociência é a uma das mais importantes áreas de investigação na ciência moderna. Ao longo dos últimos anos, o estudo de nanopartículas (NP) tem-se tornado um importante foco de interesse devido às suas propriedades únicas e potenciais aplicações. Os nanomateriais têm dimensões à escala nanométrica exibindo propriedades especiais devido à sua elevada relação superfície/volume. NP...

  14. O erro de Newton à luz da polêmica sobre o cálculo

    OpenAIRE

    Miranda, Luiz Felipe Sigwalt de

    2014-01-01

    Resumo: Os cálculos de Newton e Leibniz marcaram a história da matemática devido suas eficácias e devido `a personalidade de seus inventores. Durante a controvérsia da prioridade do cálculo, ambos se esforçaram para reclamar sua autoria. Em parte, a proposição X do livro II dos Philosophiæ Naturalis Principia Mathematica participou desse embate. O matemático leibniziano Johann Bernoulli encontrou nela uma contradição que poderia salvar o cálculo de Leibniz em detrimento do cálculo de Newton. ...

  15. Determinantes dos altos deságios nos leilões de transmissão de energia elétrica no Brasil entre 1999-2010

    Directory of Open Access Journals (Sweden)

    Katia Rocha

    2013-06-01

    Full Text Available O artigo analisa os determinantes dos altos deságios nos leilões de transmissão de energia elétrica no Brasil entre 1999-2010 através de um modelo econométrico baseado em Heckman (1979 considerando a heterogeneidade entre os lances vencedores e perdedores, e a endogeneidade desta clivagem. A partir do conjunto total de lances, explicita-se a heterogeneidade entre os grupos e corrige-se o respectivo viés devido à endogeneidade desta classificação. O objeto de pesquisa se justifica uma vez que estudos que focam apenas nos lances vencedores e que ignoram a correção devido à endogeneidade da seleção do grupo vencedor podem conduzir a conclusões impróprias.

  16. Desenvolvimento de uma aplicação web para dispositivos móveis - Monitorização e controlo de uma rede digital signage

    OpenAIRE

    Anacleto, Joaquim Alberto da Costa

    2012-01-01

    Dissertação de mestrado em Engenharia Informática O desenvolvimento de aplicações para smartphones é uma área relativamente recente, mas que tem vindo a crescer a um ritmo bastante rápido. É uma área que surge de uma forma natural devido à grande evolução das características dos smartphones e também devido à sua crescente popularidade. As grandes comunidades por trás das várias plataformas do mercado (Android, iOS, etc) também ajudam a que esta seja uma área bastante apelativa e com basta...

  17. EQUILÍBRIO QUÍMICO E SISTEMAS COLOIDAIS: A CONSTANTE DE IONIZAÇÃO

    OpenAIRE

    Romario Victor Pacheco Antero; Elisangela Cardoso de Lima Borges

    2010-01-01

    Compostos ácido-base compreendem atualmente uma das áreas de maior interesse e relevância em todos os campos da físico-química devido à importância científica e também no cotidiano/indústria. Boa parte desses compostos assim como as análises da constante de ionização (Ka) são responsáveis por inúmeros estudos do mundo químico qualitativo atual. Junto a esse pressuposto de equilíbiro ácido-base, os sistemas coloidais também assumem um alto teor significativo devido ao seu diversificado uso ...

  18. Quando só restam ossos : estudo da degradação e alteração óssea para estimativa do intervalo post-mortem

    OpenAIRE

    Buekenhout, Inês

    2014-01-01

    A estimativa do intervalo post-mortem (PMI – Post Mortem Interval) é fundamental para a reconstrução dos eventos que envolvem a morte de um indivíduo, sendo que nos últimos anos o antropólogo forense tem vindo a desenvolver um papel importante nesta área. Apesar de ser uma questão pertinente em termos judiciais, a estimativa do PMI reveste-se de uma particular dificuldade, não só devido à ausência de métodos fiáveis para o estimar como também devido à variabilidade do processo de decomposição...

  19. Estudo in vitro da atividade protetora do azeite de oliva e da pasta de pinhão (Araucaria angustifólia) sobre o esmalte dentário submetido à erosão

    OpenAIRE

    Silva, Érico Bahena da

    2013-01-01

    Resumo: A erosão dentária é a perda progressiva de estrutura dental devido à exposição crônica desta a ácidos não bacterianos e de origem intrínseca (suco gástrico) ou extrínseca, através da alimentação. Devido à existência de alimentos em benefício humano, o desenvolvimento e inovação de produtos com componentes naturais têm motivado pesquisas que objetivam prevenir doenças, além de criar novos nichos de mercado.O objetivo deste estudo foi verificar o efeito protetor do azeite de oliva e da ...

  20. Tuberculose pleural após uso de adalimumabe na doença de Crohn: relato de caso Pleural tuberculosis after using adalimumab in Crohn's disease: a case report

    OpenAIRE

    Rodrigo Rocha Batista; Paula Salvador de Toledo; Idblan Carvalho de Albuquerque; Galdino José Sitonio Formiga

    2011-01-01

    O tratamento da doença de Crohn perineal é feito pela combinação da terapia medicamentosa e da cirúrgica. A terapia biológica é importante devido à eficácia clínica na indução e manutenção de remissão da doença. No entanto, devido à ação imunomoduladora e imunossupressora, o uso de biológicos como infliximabe e adalimumabe eleva o risco de infecções oportunistas. Relatou-se o caso de paciente feminino, 28 anos, diagnosticada com doença de Crohn perineal, em uso de azatioprina e adalimumabe. H...

  1. Biossíntese de celulose bacteriana a partir de resíduos industriais

    OpenAIRE

    Gomes, Fábio Pedro Almeida

    2011-01-01

    A celulose bacteriana (CB) é um biopolímero que devido às suas propriedades estruturais e mecânicas tem uma vasta gama de aplicações em diferentes áreas. Este biopolímero pode ser produzido por algumas bactérias, nomeadamente as pertencentes ao género Gluconacetobacter. No entanto, devido ao custo do meio de cultura a produção de CB a nível industrial tem pouca viabilidade económica. O trabalho realizado teve como objectivo a utilização de diferentes resíduos da Industria Agro-Alimentar para ...

  2. Characterization of biodiesels produced from mixtures of vegetable oils

    OpenAIRE

    Fernandes, Vanda Filipa Silva

    2010-01-01

    Nos últimos anos o biodiesel tem recebido uma atenção notável devido à sua capacidade de substituir os combustíveis fósseis. É considerado um amigo do ambiente, devido às suas imensas vantagens. Este biocombustível é obtido a partir de recursos renováveis, portanto é considerado biodegradável, CO2-neutro, nãotóxico e reduz significativamente as emissões gasosas com efeito de estufa. É composto por uma mistura de ésteres mono alquílicos obtidos a partir de óleos vegetais, tais como, o ól...

  3. Concentração de fenol em resíduos de laboratórios de análises clínicas Phenol concentration evaluation in clinical analysis laboratory waste

    OpenAIRE

    Maria Clarinda de Araujo Almeida; Andréa de A. Morégula; Paulo César L. Marrocos; Soraya M. M. de Souza; Marcel Tavares de Farias

    2011-01-01

    INTRODUÇÃO: Durante décadas, os laboratórios foram considerados pouco impactantes ao meio ambiente. Tiveram essa comodidade abalada devido à mobilização da sociedade civil que vem exigindo mudanças. A Agência Nacional de Vigilância Sanitária (ANVISA) implementou a Resolução da Diretoria Colegiada (RDC) nº 306, de 7 de dezembro de 2004, criando o Plano de Gerenciamento de Resíduos de Serviços de Saúde (PGRSS), devido ao fato de o gerenciamento de resíduos sólidos não urbanos ser de responsabil...

  4. Êxito ou fracasso: produção normativa no combate à indisciplina na organização escolar

    OpenAIRE

    Silva, Carla Alexandra Melo da

    2014-01-01

    Dissertação de Mestrado em Ciências da Educação, Especialização em Administração Educacional Devido ao aumento das questões, cada vez mais problemáticas, relacionadas com a indisciplina dos alunos, e apesar de este não ser um fenómeno recente a indisciplina passou a assumir novas dimensões, devido à frequência com que esta ocorre e pela visibilidade mediática que o nosso mundo globalizado tende a enfatizar, este fenómeno ganhou uma urgência nova no cenário do processo educativo hodierno. ...

  5. Giant ileal inflammatory fibroid polyp: a rare cause of intestinal intussusception

    Directory of Open Access Journals (Sweden)

    Daniel Cury Ogata

    2012-09-01

    Full Text Available Ileal inflammatory fibroid polyp is a rare non-neoplastic lesion of the gastrointestinal tract. Intussusception caused by an inflammatory fibroid polyps is uncommon. The authors report a case of a 75 year-old female patient presenting with ileal obstruction due to intussusception of a polypoid lesion. The patient underwent surgical treatment and histopathology confirmed the diagnosis.Os pólipos fibroides inflamatórios são raras lesões não neoplásicas do trato gastrointestinal e a intussuscepção devido a essa entidade é incomum. Os autores relatam um caso de paciente do sexo feminino, 75 anos, que apresentou obstrução ileal devido a uma intussuscepção por lesão polipoide. A paciente foi submetida a tratamento cirúrgico, sendo diagnosticado pólipo fibroide inflamatório do íleo.

  6. Integração de energia eólica-solar térmica na produção de água quente

    OpenAIRE

    Gouveia, Vítor Miguel Frango de

    2007-01-01

    A evolução do mundo está cada vez mais dependente da energia, possuindo esta um papel fundamental no desenvolvimento dos países. No entanto oconsumo de energia crescente implica uma crescente produção de energia, oque na realidade actual já começa a ser um grande problema devido à grandedependência da produção de energia através de fontes não renováveis,nomeadamente o petróleo. Por um lado a situação agrava-se devido à prevista escassez do petróleo e constante instabilidade no seu preço, por ...

  7. Gestão de doenças crónicas : contributo para a gestão da doença de Parkinson em Portugal

    OpenAIRE

    Fonseca, Gabriela Antónia Pinheiro

    2013-01-01

    Dissertação submetida como requisito parcial para obtenção do grau de Mestre em Gestão de Serviços de Saúde / Códigos Jel: I12 - Produção de Saúde I15 - Saúde e Desenvolvimento Económico As doenças crónicas tornaram-se num desafio para a sociedade do século XXI, devido ao seu aumento, ao aumento do número de portadores destas doenças, ao aumento dos custos diretos e indiretos para os doentes, famílias, sociedade e também devido às alterações demográficas que estas acarretam. ...

  8. Determinação das constantes cinéticas de degradação do ácido ascórbico em purê de pêssego: efeito da temperatura e concentração Determination of reaction rate constants for ascorbic acid degradation in peach pureé: effect of temperature and concentration

    OpenAIRE

    Ricardo Peraça Toralles; João Luiz Vendruscolo; Claire Tondo Vendruscolo; Francisco Augusto Burkert Del Pino; Pedro Luiz Antunes

    2008-01-01

    O ácido ascórbico, vitamina C, é usado extensivamente na indústria de alimentos, não só devido ao seu valor nutricional, mas devido a suas contribuições funcionais na qualidade do produto. Existem muitos estudos sobre a estabilidade cinética do ácido ascórbico em bebidas, mas nenhum estudo foi encontrado sobre as constantes cinéticas de degradação do ácido ascórbico adicionado em purê de pêssego. Neste trabalho, estudou-se a cinética de degradação do ácido ascórbico em purê de pêssego da cult...

  9. Consequências da prematuridade no sistema respiratório

    OpenAIRE

    Barbosa, Ana Rita Ferreira

    2015-01-01

    Todos os anos nascem cerca de 15 milhões de crianças prematuras em todo o mundo e mais de 1 milhão morre no primeiro mês devido a várias complicações. A sobrevivência de um prematuro é cada vez maior devido aos avanços nos cuidados perinatais, contudo estas crianças sofrem frequentemente de morbilidade respiratória crónica. Os recém-nascidos prematuros têm um risco aumentado de possuírem alterações na função pulmonar durante a infância, adolescência e idade adulta, bem como um ...

  10. Estudo comparativo e avaliação de diferentes sistemas de compostagem de resíduos sólidos urbanos

    OpenAIRE

    Fernandes, Paulo Alexandre Lopes

    1999-01-01

    Os modelos de desenvolvimento económico e as mudanças nos padrões e hábitos da sociedade têm levado a uma crescente produção de resíduos sólidos urbanos. Em Portugal o volume crescente de resíduos sólidos urbanos transformou-se num problema para os municípios, quer devido à escassez de espaço, quer devido às soluções e custos para resolver este problema. O Plano Estratégico para os Resíduos Sólidos Urbanos, editado pelo Ministério do Ambiente em 1997, indica produções de 3 340 000 toneladas d...

  11. RECICLAGEM DE PNEUS: ATITUDE AMBIENTAL ALIADA À ESTRATÉGIA ECONÔMICA

    OpenAIRE

    Henkes, Jairo Afonso; Rodrigues, Cristiano Millani

    2015-01-01

    Devido ao grande crescimento da indústria automobilística no Brasil, com o passar dos anos, começaram os problemas de descarte dos pneus utilizados pelos automóveis e caminhões que chegavam ao fim da vida útil. Os pneus inservíveis geralmente não eram recolhidos adequadamente, ocasionando problemas ambientais devido à sua queima, como também de saúde pública, porque quando jogados a céu aberto acumulam água da chuva propiciando a criação de insetos transmissores de doenças como a dengue, malá...

  12. Cisticercos calcificados em gânglios da base e síndrome Parkinsoniana: registro de um caso

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Cavalcanti

    1984-06-01

    Full Text Available Devido à raridade da neurocisticercose no Maranhão, que não é zona endêmica, assim como pela raridade do processo patológico observado, é feito registro do caso de paciente com 57 anos, maranhense, com parkinsonismo sintomático relacionado a calcificações nos gânglios basais por cisticercos, demonstrados mediante tomografia computadorizada.

  13. Tratamentos alternativos em apicultura biológica. Aplicação em Trás-os-Montes e Alto Douro

    OpenAIRE

    Vilas-Boas, Miguel

    2005-01-01

    A utilização de pesticidas sintéticos no combate a Varroa apresenta alguns inconvenientes, destacando-se a acumulação de resíduos, a decréscimo na eficiência do tratamento devido a ocorrência de resistência provocada pelo uso continuado e a impossibilidade da sua utilização em apicultura no modo de produção biológica (MPB).

  14. Primary hyperparathyroidism simulating motor neuron disease: case report Hiperparatiroidismo primário simulando doença do neurônio motor: relato de caso

    OpenAIRE

    Alzira Alves de Siqueira Carvalho; Adriano Vieira; Hougelle Simplício; Satomi Fugygara; Solyon Maia Carvalho; Moacyr Pezati Rigueiro

    2005-01-01

    We report a case of a 26-year-old man who presented a lower motor neuron syndrome due to hyperparathyroidism. Electromyography showed neurogenic features with normal nerve conduction studies. Hypercalcemia led to the discovery of a primary hyperparathyroidism with gland hyperplasia. Following parathyroid surgery there was recovery of the neurological symptoms.Descrevemos o caso de homem de 26 anos que apresentou síndrome do neurônio motor inferior devido a hiperparatiroidismo. A eletromiograf...

  15. Diagnósticos e Intervenções de Enfermagem aos pacientes em terapia anticoagulante Diagnóstico e intervenciones de enfermería a los pacientes en terapia anticoagulante Nursing Diagnoses and Interventions for Patients under Anticoagulant Therapy

    OpenAIRE

    Maria Shirley Barbosa; Francisco Humberto Mafei; Maria José Sanches Marin

    2004-01-01

    Os pacientes que fazem uso de anticoagulante orais apresentam necessidades especificas, para as quais, o atendimento de enfermagem tem um importante papel, principalmente, no sentido de prevenir complicações. A presente revisão foi realizada visando discutir os diagnósticos de enfermagem para esses pacientes, utilizando-se do sistema North American Nursing Diagnoses Association - NANDA. Os diagnósticos para esses pacientes retratam o risco de sangramento e retrombose quase sempre devido ao co...

  16. Metabolismo do ácido fólico na malária

    Directory of Open Access Journals (Sweden)

    Aymoré Vaz Pinto

    1983-06-01

    Full Text Available O estudo de 27 pacientes infectados pelo Plasmodium falciparum comparado com pessoas aparentemente sadias mostra: a diminuição do folato no soro dos pacientes infectados; b diminuição do folato sêrico nos primeiros 8 dias que seguiram ao tratamento, interpretados como sendo devido à mobilização pela eritropoiese compensadora; c folato eritrocítico normal.

  17. Derivados 1,3,4 - Tiadiazóis Mesoiônicos

    OpenAIRE

    Pires, Amanda do Rocio Andrade

    2011-01-01

    Resumo: As celulas cancerosas sao tolerantes a muitos tratamentos devido a aquisicao de mecanismos de resistencia a apoptose e por apresentarem um programa proliferativo anormal. Neste contexto, o desenvolvimento de novos farmacos com atividade antitumoral e o entendimento de seu mecanismo de acao e essencial. Os compostos mesoionicos tem mostrado atividade contra diferentes linhagens tumorais, a qual tem sido atribuida as suas caracteristicas fisico-quimicas. Dentre estes compostos, os deriv...

  18. Entre combos e enigmas: a complexidade da narrativa dos games

    Directory of Open Access Journals (Sweden)

    Pinheiro, Cristiano Max Pereira

    2005-01-01

    Full Text Available O presente estudo aborda o universo dos games e, como uma forma de realizar uma investigação completa do assunto, invade também questões referentes ao cinema, à televisão, à literatura, aos quadrinhos e à música. Devido à extrema diversidade do formato aqui estudado, optou-se por focalizar a análise em dois conceitos fundamentais: narrativa e interatividade.

  19. Formação das substâncias de reserva durante o desenvolvimento de sementes de urucum (Bixa orellana L. - Bixaceae

    Directory of Open Access Journals (Sweden)

    Amaral Lourdes I. V. do

    2001-01-01

    Full Text Available As sementes de urucum não germinam durante os primeiros estádios de seu desenvolvimento devido em parte à insuficiência de materiais de reserva. A análise in situ do material de reserva das sementes revelou que ocorrem principalmente proteínas e amido nas células do endosperma. Durante os estádios iniciais do desenvolvimento, o formato dos grãos de amido mostrou-se elíptico, devido a menor quantidade de amilose. Durante o desenvolvimento, os grãos tornaram-se mais esféricos devido ao aumento de amilose em relação a amilopectina. As células do endosperma não possuem corpos protéicos, mas armazenam proteínas. Durante o desenvolvimento houve acúmulo de proteínas dispersas pelo citoplasma. No estádio final do desenvolvimento, as proteínas tornaram-se compactadas devido à desidratação das sementes, que faz parte do processo global de maturação de sementes ortodoxas. A utilização de fluorescência natural revelou a presença de aminoácidos aromáticos no conteúdo protéico, principalmente triptofano e tirosina. Nestas sementes o conteúdo de matéria seca alcançou o máximo quando a semente apresentou cerca de 60% de umidade. Nesta fase a semente apresentou capacidade germinativa máxima.

  20. Achado incidental de glândula sebácea em colo uterino: provavelmente um processo metaplásico An incidental finding of sebaceous glands in the uterine cervix: a probable metaplastic process

    Directory of Open Access Journals (Sweden)

    Daniel Cury Ogata

    2012-06-01

    Full Text Available As glândulas sebáceas ectópicas são achados muito infrequentes no trato genital feminino. Descrevemos um caso que ocorreu em paciente de 42 anos de idade, submetida à histerectomia total, devido à leiomiomatose e ao prolapso uterino.The ectopic sebaceous glands have been extremely rare findings in female genital system. We describe the case of 42 years-old patient with total hysterectomy due to leiomyomatosis and uterine prolapsed.

  1. Tratamento de rânula pela marsupialização: relato de caso = Treatment of ranula by marsupialization: report of a case

    Directory of Open Access Journals (Sweden)

    Leite Segundo, Airton Vieira

    2006-01-01

    Full Text Available Rânula é uma lesão de etiologia traumática que normalmente desenvolve-se devido à ruptura de um ou mais ductos das glândulas salivares, resultando num extravasamento ou retenção do muco no assoalho da boca. O presente artigo tem como objetivo descrever um caso de rânula acompanhado do seu tratamento por meio da técnica de marsupialização

  2. Complicações da Diabetes Mellitus

    OpenAIRE

    I.V. Figueiredo; Caramona, M.M.

    1991-01-01

    A Diabetes é uma doença, cujos sinais e sintomas são devidos a uma deficiência na secreção de insulina ou a uma falência na acção dessa mesma insulina. No presente artigo são apresentados as inúmeras repercussões clínicas das alterações metabólicas inerentes a essas mesmas causas.

  3. A interpretação do cuidado com o ostomizado na visão do enfermeiro: um estudo de caso

    OpenAIRE

    Gemelli Lorena Moraes Goetem; Zago Márcia Maria Fontão

    2002-01-01

    Este estudo teve como objetivo identificar como os enfermeiros de uma instituição hospitalar interpretam o cuidado com o ostomizado, por meio do método de estudo de caso. Os resultados obtidos deram origem a quatro categorias: o paciente precisa de um cuidado especial; é preciso orientar; para orientar a enfermagem precisa...; reconhecimento das dificuldades para o cuidado especial. Por essas categorias consideramos que os enfermeiros fornecem um cuidado inadequado devido à falta de conhecime...

  4. A interpretação do cuidado com o ostomizado na visão do enfermeiro: um estudo de caso La interpretación del cuidado con el ostomizado en la visión del enfermero: un estudio de caso The meaning of ostomy care to nurses: a case study

    OpenAIRE

    Lorena Moraes Goetem Gemelli; Márcia Maria Fontão Zago

    2002-01-01

    Este estudo teve como objetivo identificar como os enfermeiros de uma instituição hospitalar interpretam o cuidado com o ostomizado, por meio do método de estudo de caso. Os resultados obtidos deram origem a quatro categorias: o paciente precisa de um cuidado especial; é preciso orientar; para orientar a enfermagem precisa...; reconhecimento das dificuldades para o cuidado especial. Por essas categorias consideramos que os enfermeiros fornecem um cuidado inadequado devido à falta de conhecime...

  5. Estudo do impacto das deficiências de saneamento básico sobre a saúde pública no Brasil no período de 2001 a 2009

    Directory of Open Access Journals (Sweden)

    Júlio César Teixeira

    2014-03-01

    Full Text Available O artigo teve como objetivo desenvolver um estudo do impacto sobre a saúde pública das deficiências do saneamento básico no Brasil no período de 2001 a 2009. Os óbitos resultantes de doenças relacionadas ao saneamento básico inadequado corresponderam, em média, a 13.449 mortes por ano, ou seja, cerca de 1,31% do total. A média anual de casos de notificação compulsória devido a doenças relacionadas ao saneamento básico inadequado foi de 466.351 casos, com uma despesa de R$ 30.428.324,92 em consultas médicas nesse período. Foi identificada também uma média anual de 758.750 internações hospitalares devido a deficiências do saneamento básico, com uma despesa total de R$ 2.111.567.634,61 no período. A despesa total com consultas médicas e internações hospitalares devido a doenças associadas ao saneamento básico consumiu 2,84% dos gastos do Sistema Único de Saúde nesse intervalo de tempo.

  6. Reaproveitamento do caroço da azeitona para produção de sabonete esfoliante: Uma produção sustentável

    Directory of Open Access Journals (Sweden)

    Raquel Êmily Pinheiro Cordeiro

    2015-09-01

    Full Text Available Inúmeras indústrias de cosméticos têm direcionado suas pesquisas no desenvolvimento de novos produtos utilizando matérias-primas de origens vegetais, representando uma alternativa de substituição dos materiais sintéticos por naturais. Uma tendência evidenciada ultimamente é a utilização de resíduos do processamento de alimentos tais como sementes e cascas, devido o grande potencial dos componentes bioativos dos mesmos. O uso do caroço de azeitona na área cosmética apresenta características favoráveis devido à qualidade dos mesmos ajudar na esfoliação da pele. O caroço da azeitona constitui um dos principais resíduos gerados nas indústrias de processamento de azeite. Atualmente estes resíduos são geralmente queimados, a fim de recuperar o calor residual da sua combustão. Devido as suas substâncias químicas e físicas, o caroço é rico em componentes bioativos para sua utilização ser restringida apenas a processos de combustão. Diante do exposto o objetivo deste trabalho foi produzir um sabonete esfoliante em barra à base de caroço de azeitona, agregando valor a este resíduo.

  7. 非寄主植物挥发油对黄曲条跳甲成虫嗅觉、取食及产卵行为的影响%The Influence of Non-Host Plant Volatiles on Olfactory, Feeding and Oviposition Behavior of Phyllotreta striolata Fabricius

    Institute of Scientific and Technical Information of China (English)

    赵辉; 张茂新; 凌冰; 张世军; 丛斌; 梁广文

    2003-01-01

    选取5种黄曲条跳甲(Phyllotreta striolata Fabricius)的非寄主植物:薇甘菊(Mikania micrantha H. B. K)、飞机草(Chromolaena odorata L.)、蟛蜞菊[Wedelia chinensis (Osb.) Merr.]、马缨丹(Lantana camara L.)和番茄(Lycopersicon esculentum Mill.).应用四臂嗅觉仪测定了黄曲条跳甲成虫对各种挥发油的嗅觉反应.结果表明:5种植物挥发油对黄曲条跳甲成虫都具有很强的驱避作用.室内选择性试验结果进一步证实了几种植物挥发油对黄曲条跳甲成虫取食和产卵行为具有干扰作用.

  8. Eriophyid-myte (Acari: Eriophyoidea: Eriophyidae as moontlike beheeragente van ongewenste uitheemse plante in Suid-Afrika

    Directory of Open Access Journals (Sweden)

    C. Craemer

    1996-07-01

    Full Text Available Eriophyid-myte kom waarskynlik op die meeste hoër plante voor en is oor die algemeen baie gasheerspesifiek. Sommiges is skadelik genoeg om oorweeg te word vir biologiese beheerprogramme teen ongewenste plante. Algemene belangstelling in die gebruik van eriophyids vir onkruidbeheer het onlangs ontstaan en vyf spesies is reeds, meestal suksesvol, gebruik vir onkruidbeheer in ander lande. Eriophyid-myte is nog nie as onkruidbeheeragente in Suid-Afrika benut nie. Sewentien spesies wat simptome veroorsaak wat moontlik nuttig kan wees vir die beheer van 12 plantspesies, wat as onkruide in Suid-Afrika beskou word, word gelys en bespreek. Die onkruide is: Acacia saligna (Port Jackson, Acroptilon repens (Russiese dissel, Cardaria draba (peperbos cardaria, Chromolaena odorata (paraffienbos. Convolvulus arvensis (akkerwinde, Cuscuta epithymum (dodder, Hypericum perforatum (St. Janskruid, Lantana camara (lantana, Melia azedarach (sering, Opuntia inermis (doringturksvy, Solanum elaeagnifolium (satansbos, S. mauritianum (luisboom en Spartium junceum (Spaanse besem. Sommige van hierdie eriophyid-spesies kan moontlik suksesvol as onkruidbeheeragente in Suid-Afrika gebruik word en derhalwe is verdere navorsing in hierdie verband geregverdig.

  9. TWO ORIGINS SEED DETERIORATION Swietenia macrophylla King., UNDER DIFFERENT STORAGE METHODOS

    Directory of Open Access Journals (Sweden)

    Marcos R. Soto Hernández

    2006-04-01

    Full Text Available SUMMARY Three Factors (humidity content, container and storage trat might affect seed viability of two provenances of Swietenia macrophylla King were evaluated, taking in consideration as main factor the germination percentage and relating it with the humidity content through three storage and the fatty acids at the beginning at the ending and, the measurement of the humidity content was done by the conventional method, the lipids quality was done by chromatography gas technique; the experimental design was completely made at random of factorial arrangements with tree it´s viability repetitions results show that humidity content is related with it´s viability and besides it is influenced by container type in this case it turned out to be the metal container, the best, stored freeze camara at 5C; five lipids were determined, the insatured of these ones acelerate the deterioration process of the seed´s physiological quality, which is more noticeable in the Campeche provenance.

  10. The design of image decompression IP core based on the standard of Avalon%基于Avalon总线的图像解压缩IP核设计

    Institute of Scientific and Technical Information of China (English)

    何伟; 王艳; 张玲; 邬丽娜

    2011-01-01

    The paper introduce the design and realization of JPEG image decompression IP core based on the standard of Avalon. Every module was designed respectively in the way of pipeline and modularization. Then these module were made up top - level module,used Avalon bus interface and SoPC Builder,intergrating the IP core in the system.The IP greatly improves the decoding speed and have expansibility,can be integrated into various digital application such as cell phone and camara.%介绍了基于Avalon总线的静态图像压缩标准JPEG基本模式解码器软IP核的设计和实现.IP核采用流水线和模块化的设计方法,分别设计各个模块完成其独立的功能,然后将这些模块组成一个顶层模块,采用Avalon总线接口,利用SOPC Builder工具将IP核集成到系统中.该IP核极大地提高了解码速度,具有可移植性,可以方便地集成到手机、数码相机等数字产品中.

  11. Study of a hybrid solar-electric oven to the curing composite materials used in aeronautics; Estudio de un horno hibrido solar-electrico para el curado de materiales compuestos utilizados en aeronautica

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Roman, M. A.; Pineda Pinon, J.; Sanchez Sanchez, A. [CICATA - Unidad Queretaro, Santiago de Queretaro, Queretaro (Mexico)]. E-mail: mhernandezr0900@ipn.mx

    2010-11-15

    The study covers the curing of advanced composites in a hybrid solar electric oven. The furnace uses electricity from the grid power and solar energy provided by the heliostat concentrator system. The materials used in the experiments will be composite materials such as prepreg. The prepreg are fiberglass and carbon fiber. The resin used in the pre-impregnate will be epoxy resin. The work temperatures inside the furnace will be maximum 300 degrees Celsius. The obtained results will be useful to characterize the use of the solar energy and the characterize of the curing chamber. [Spanish] Se presenta el alcance para el estudio, el cual abarca el curado de materiales compuestos avanzados dentro de un horno hibrido solar electrico. El horno utilizara energia electrica suministrada por la red y energia solar suministrada por el sistema heliostato concentrador. Los materiales utilizados en los experimentos seran materiales compuestos tipo prepreg. Los prepreg seran de fibra de vidrio y de fibra de carbono. La resina utilizada en el preimpregando sera resina epoxica. Las temperaturas de trabajo dentro del horno seran como maximo de 300 grados centigrados. Los resultados obtenidos serviran para caracterizar el uso y aprovechamiento de la energia solar y la caracterizacion de la camara de curado.

  12. Une journée dans la vie d’Augustine Amaya d’Emmanuel Dongala : l’ identité de la femme africaine et du peuple congolais

    Directory of Open Access Journals (Sweden)

    Olivia Kabongo

    2010-05-01

    Full Text Available La femme a un rôle central dans Jazz et vin de palme d’Emmanuel Dongala, surtout dans la nouvelle intitulée Une journée dans la vie d’Augustine Amaya. Par le biais du personnage d’Augustine Amaya et du processus de création littéraire, l’auteur explore la relation homme-femme, ainsi que le statut et l’identité de la femme dans la société centre-africaine. Dongala nous présente une image de la femme en tant que mère du peuple, et aussi belle qu’elle soit, elle reflète aussi le paradoxe de la femme noire. Cette image idéalisée de la femme sera analysée dans cet article et comparée à celle que Camara Laye présente dans L’Enfant noir, Maryse Condé dans Moi Tituba Sorcière et Alice Walker dans In Search of our Mother’s Gardens.

  13. IIE`s wind tunnel calibration; Calibracion del tunel de viento del IIE

    Energy Technology Data Exchange (ETDEWEB)

    Pena Garcia, Raymundo [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1985-12-31

    The calibration of a wind tunnel is performed in such a way as to warrant a very low turbulence grade. When there is recently built tunnel, as is the case of the IIE`s tunnel, the turbulence in its testing chambers is large; for this reason it is necessary to integrate in it aerodynamic devices and elements capable of reducing it. At the end of the calibration studies can be performed in models with controlled scale. From these and from the results obtained it will be decided if the designed prototypes are built or modified. [Espanol] La calibracion de un tunel de viento se realiza de tal forma que garantiza un grado de turbulencia muy bajo. Cuando se tiene un tunel recien construido, como es el caso del tunel de viento del IIE, la turbulencia en sus camaras de prueba es grande; por lo que es necesario integrarle dispositivos y elementos aerodinamicos que sean capaces de reducirla. Al terminar la calibracion pueden realizarse estudios en modelos con escala controlada. De estos y de los resultados que se obtengan se decidira si se construyen o se modifican los prototipos disenados.

  14. Cuantificación de la carga física y psicológica en fútbol profesional: diferencias según el nivel competitivo y efectos sobre el resultado en competición oficial

    Directory of Open Access Journals (Sweden)

    Antonio Jos\\u00E9 G\\u00F3mez-D\\u00EDaz

    2013-01-01

    Full Text Available Este estudio analiza la respuesta que tienen los futbolistas profesionales de diferentes niveles competitivos a los estimulos de entrenamiento y competicion, asi como su relacion con en el rendimiento en partido. Un total de 20 jugadores de nivel Elite (Premier League-1º División Inglesa y 22 jugadores de nivel Sub-elite (Championship Division – 2º División Inglesa tomaron parte en el estudio. Individualmente se monitorizo la carga de entrenamiento a traves del % frecuencia cardiaca maxima (%FCmax, tiempo de entrenamiento segun intensidades y la percepcion subjetivo del esfuerzo (PSE, asi como la carga de competicion mediante el sistema multi-camara ProZoneR durante toda la segunda vuelta de la liga en ambos equipos. La PSE, %FCmax y la distancia recorrida en entrenamiento, asi como la distancia cubierta en partido oficial fueron significativamente inferiores (p < .05 en los jugadores Elite. La PSE, un indicador valido para estimar la carga fisica y psicologica de los jugadores, correlaciono significativamente (p < .05 con el propio rendimiento condicional de entrenamiento y competicion. La distancia cubierta en partido oficial fue significativamente superior (p < .05 cuando obtuvieron victorias en sus encuentros. Los resultados de este estudio sugieren que los futbolistas de clase mundial soportan una menor carga de entrenamiento y competicion, apoyandose en mayor medida en sus habilidades tecnico-tacticas.

  15. Butterflies (Lepidoptera: Papilionoidea and Hesperioidea visiting flowers in the Botanical Garden of the Federal University of Santa Maria, Santa Maria, RS, Brazil

    Directory of Open Access Journals (Sweden)

    Ana Beatriz Barros de Morais

    2008-12-01

    Full Text Available Urban environments, such as parks and gardens, may offer many alimentary resources, besides shelter and favorable conditions, for butterfly survival. This study aimed to make an inventory of butterflies visiting flowers in the Botanical Garden of the Federal University of Santa Maria (UFSM. From March 2006 to March 2007, the floral visitors were observed weekly for 2h. After 108 hours’ observations, 1114 visits by 39 butterfly species, associated with 43 plant species (21 families, were confirmed. Among the butterflies, Nymphalidae had the highest richness of species (S= 18, followed by Hesperiidae (S= 8, Pieridae (S= 7, Papilionidae (S= 4 and Lycaenidae (S= 2. The pierid Phoebis philea philea was the most frequent species (188 visits, followed by hesperiids Urbanus proteus proteus (100, U. teleus (73 and the nymphalid Heliconius erato phyllis (71. Lantana camara (Verbenaceae, Eupatorium laevigatum (Asteraceae, Russelia equisetiformis (Scrophulariaceae and Stachytarpheta cayennensis (Verbenaceae were the most visited plants. The Botanical Garden of UFSM is an example of an urban park that seems to provide floral resources for the feeding of many butterfly species, being also a potential refuge for species from forest areas nearby.

  16. Estimation of Anticipated Performance Index and Air Pollution Tolerance Index and of vegetation around the marble industrial areas of Potwar region: bioindicators of plant pollution response.

    Science.gov (United States)

    Noor, Mehwish Jamil; Sultana, Shazia; Fatima, Sonia; Ahmad, Mushtaq; Zafar, Muhammad; Sarfraz, Maliha; Balkhyour, Masour A; Safi, Sher Zaman; Ashraf, Muhammad Aqeel

    2015-06-01

    Mitigating industrial air pollution is a big challenge, in such scenario screening of plants as a bio monitor is extremely significant. It requires proper selection and screening of sensitive and tolerant plant species which are bio indicator and sink for air pollution. The present study was designed to evaluate the Air Pollution Tolerance Index (APTI) and Anticipated Performance Index (API) of the common flora. Fifteen common plant species from among trees, herb and shrubs i.e. Chenopodium album (Chenopodiaceae), Parthenium hysterophorus (Asteraceae), Amaranthus viridis (Amaranthaceae), Lantana camara (Verbenaceaea), Ziziphus nummulari (Rhamnaceae), Silibum merianum (Asteraceae), Cannabis sativa (Cannabinaceae), Calatropis procera (Asclepediaceae), Ricinus communis (Euphorbiaceae), Melia azadirachta (Meliaceae), Psidium guajava (Myrtaceae), Eucalyptus globules (Myrtaceae), Broussonetia papyrifera (Moraceae), Withania somnifera (Solanaceae) and Sapium sabiferum (Euphorbiaceae) were selected growing frequently in vicinity of Marble industries in Potwar region. APTI and API of selected plant species were analyzed by determining important biochemical parameter i.e. total chlorophyll, ascorbic acid, relative water content and pH etc. Furthermore the selected vegetation was studied for physiological, economic, morphological and biological characteristics. The soil of studied sites was analyzed. It was found that most the selected plant species are sensitive to air pollution. However B. papyrifera, E. globulus and R. communis shows the highest API and therefore recommended for plantation in marble dust pollution stress area. PMID:25503327

  17. Thermodynamic methodology for the design of solar dryers operated with flat solar collectors; Metodologia termodinamica para el diseno de secadores operados con calentadores solares planos

    Energy Technology Data Exchange (ETDEWEB)

    Torres Reyes, Ernestina; Navarrete Gonzalez, Jose L; Ibarra Salazar, Beatriz A; Picon Nunez, Martin [Instituto de Investigaciones Cientificas, Universidad de Guanajuato, Guanjuato, Guanajuato (Mexico)

    2000-07-01

    In this paper a thermal performance analysis of solar drying process at operating varying conditions is presented. It is described semi-empirical models to thermal characterization of an experimental device. A simulator of thermal performance for operating varying conditions was developed as a part of the procedure of thermal design of solar dryers. On the other hand, it is described a simplified method to design solar collectors based on the determination of minimum entropy generation during the thermal conversion of the solar device by using the thermal analysis procedure established and the method derived of the second law of the Thermodynamics are finally presented. [Spanish] En este trabajo se presenta el analisis termico del comportamiento del sistema -colector solar camara de secado-. Se describen los modelos semi-empiricos con los que se caracterizo termicamente un secador solar experimental del tipo indirecto. Se presenta tambien un procedimiento de diseno de equipo de secado que toma en cuenta las condiciones variables de operacion que presentan los dispositivos solares. Por otro lado se describe un procedimiento simplificado de diseno, basado en un analisis derivado de la segunda ley de la Termodinamica. Esta metodologia se fundamenta en la minima generacion de entropia durante la conversion termica de la energia solar, utilizando colectores solares planos. Finalmente se presentan los resultados del diseno preliminar de equipo de secado utilizando los dos procedimientos mencionados.

  18. EVALUACION DE LA RESISTENCIA A LA CORROSION DEL SISTEMA PRIMER EPOXICO RICO EN ZINC/ACABADO POLISILOXANO POR MEDIO DE ESPECTROSCOPIA DE IMPEDANCIA ELECTROQUIMICA

    Directory of Open Access Journals (Sweden)

    ANDRES ALBERTO GUZMAN ROSAS

    2011-01-01

    Full Text Available En este trabajo fue estudiado el sistema primer epoxico rico en zinc / acabado polisiloxano aplicado sobre laminas de acero al carbono laminado en caliente y sometido a camaras de corrosion acelerada (inmersion total, niebla salina, ciclo de corrosion y prohesion por un periodo de hasta 5000 horas. Las probetas bajo estudio se evaluaron cada 20 dias por medio de espectroscopia de impedancia electroquimica y al final de la prueba se realizaron chequeos visuales y microscopia optica para ver la morfologia de la interface metal-recubrimiento y microespectroscopia Raman para identificar la presencia de posibles productos de corrosion. Los resultados de impedancia fueron simulados por medio de circuitos electricos equivalentes. Para el sistema se encontraron modulos de impedancia del orden de 1011 ¿.cm2 en prohesion, 1010 ¿.cm2 en ciclo de corrosion, 109 ¿.cm2 tanto niebla salina como en las inmersiones totales (NaCl 10-2M y Na2SO4 10-2M. Este sistema tuvo durante el tiempo de pruebas un comportamiento excelente con altas resistencias de pelicula y de transferencia de carga y bajas capacitancias de pelicula y de doble capa.

  19. Methodology for the accelerated simulation of the deterioration that by atmospheric corrosion appears in electronic equipment; Metodologia para la simulacion acelerada del deterioro que por corrosion atmosferica se presenta en equipo electronico

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz Prado, A.; Schouwenaars, R.; Cerrud Sanchez, S.M. [Facultad de Ingenieria, UNAM, Mexico, D.F. (Mexico)

    2002-12-01

    The corrosion resistance of systems and electronic parts which are designed to work in atmospheric conditions have been tested for decades; some of these methods were the Cyclic Humidity Test, Field Tests and Salt Spray (Fog) Testing, the latter was one of the most popular methods. However, the salt spray test and most of the other existing methods do not show strong relationships with the real conditions of service. For this reason, it is necessary to develop appropriated methods and equipment for the accelerated simulation of real atmospheric corrosion phenomena. This article seeks to demonstrate the need to develop a test and the necessary equipment to reproduce the damage in electronic systems and equipment by atmospheric corrosion. [Spanish] Para la evaluacion de la resistencia a la corrosion de sistemas y equipo electronico que trabajaran bajo condiciones de deterioro generadas por el medio ambiente, se han aplicado una serie de ensayos, donde el mas popular es el de camara de niebla salina. Sin embargo, este y otros que se han elaborado para tal efecto no tienen ninguna relacion con las condiciones reales de servicio, por lo que es necesario un metodo de evaluacion que permita simular de forma acelerada los fenomenos de deterioro por efectos ambientales. Este articulo pretende demostrar la necesidad de desarrollar una prueba, que en forma acelerada, reproduzca el dano que sufre el material por efecto de la atmosfera; el cual se orienta a la evaluacion de equipo electrico y electronico.

  20. Weedy lignocellulosic feedstock and microbial metabolic engineering: advancing the generation of 'Biofuel'.

    Science.gov (United States)

    Chandel, Anuj K; Singh, Om V

    2011-03-01

    Lignocellulosic materials are the most abundant renewable organic resources (~200 billion tons annually) on earth that are readily available for conversion to ethanol and other value-added products, but they have not yet been tapped for the commercial production of fuel ethanol. The lignocellulosic substrates include woody substrates such as hardwood (birch and aspen, etc.) and softwood (spruce and pine, etc.), agro residues (wheat straw, sugarcane bagasse, corn stover, etc.), dedicated energy crops (switch grass, and Miscanthus etc.), weedy materials (Eicchornia crassipes, Lantana camara etc.), and municipal solid waste (food and kitchen waste, etc.). Despite the success achieved in the laboratory, there are limitations to success with lignocellulosic substrates on a commercial scale. The future of lignocellulosics is expected to lie in improvements of plant biomass, metabolic engineering of ethanol, and cellulolytic enzyme-producing microorganisms, fullest exploitation of weed materials, and process integration of the individual steps involved in bioethanol production. Issues related to the chemical composition of various weedy raw substrates for bioethanol formation, including chemical composition-based structural hydrolysis of the substrate, need special attention. This area could be opened up further by exploring genetically modified metabolic engineering routes in weedy materials and in biocatalysts that would make the production of bioethanol more efficient. PMID:21181146

  1. Orientation of Anopheles gambiae (Diptera: Culicidae) to Plant-Host Volatiles in a Novel Diffusion-Cage Olfactometer.

    Science.gov (United States)

    Otienoburu, Philip E; Nikbakhtzadeh, Mahmood R; Foster, Woodbridge A

    2016-01-01

    A novel diffusion-cage olfactometer tested the responses of Anopheles gambiae Giles to plant volatiles. Green-leaf volatiles are often released from cut or injured plant tissue and may alter the headspace of plants used in olfactometer assays. The diffusion-cage olfactometer is designed for use with whole, intact plants, hence giving a more realistic behavioral assay. Its simple plastic construction, ease of assembly, and accommodation to whole plants makes it a useful tool for measuring mosquito orientation to plant volatiles within large enclosures. We compared its performance to that of the more commonly used T-tube wind-tunnel olfactometer, by testing the orientation of mosquitoes to volatiles of a few prevalent plants of eastern Africa reportedly utilized by An. gambiae for sugar: Parthenium hysterophorus (Asteraceae), Ricinus communis (Euphorbiaceae), Lantana camara (Verbenaceae), and Senna occidentalis (Fabaceae). Results indicate that the diffusion-cage olfactometer is an effective alternative to conventional wind-tunnel olfactometers, to test mosquito orientation to plant volatiles under seminatural conditions. PMID:26502752

  2. Invasive, naturalized and casual alien plants in southern Africa: a sum­mary based on the Southern African Plant Invaders Atlas (SAPIA

    Directory of Open Access Journals (Sweden)

    L. Henderson

    2007-12-01

    Full Text Available The primary objective of this publication is to provide an overview of the species identity, invasion status, geographical extent, and abundance of alien plants in South Africa, Swaziland and Lesotho, based on field records from 1979 to the end of 2000. The dataset is all the species records for the study area in the Southern African Plant Invaders Atlas (SAPIA database during this time period. A total of 548 naturalized and casual alien plant species were catalogued and invasion was recorded almost throughout the study area. Most invasion, in terms of both species numbers and total species abundance, was recorded along the southern, southwestern and eastern coastal belts and in the adjacent interior. This area includes the whole of the Fynbos and Forest Biomes, and the moister eastern parts of the Grassland and Savanna Biomes. This study reinforces previous studies that the Fynbos Biome is the most extensively invaded vegetation type in South Africa but it also shows that parts of Savanna and Grassland are as heavily invaded as parts of the Fynbos. The Fabaceae is prominent in all biomes and Acacia with 17 listed species, accounts for a very large proportion of all invasion. Acacia mearmii was by far the most prominent invasive species in the study area, followed by A. saligna, Lantana camara, A. cyclops, Opuntia ficus-indica. Solarium mauritianum, Populus alba/xcanescens, Melia azedarach, A. dealbata and species of Prosopis.

  3. 中国大陆一种新害虫:马缨丹绵粉蚧%A new pest, Phenacoccus parvus Morrison (Hemiptera:Coccoidea:Pseudococcidae), in mainland China

    Institute of Scientific and Technical Information of China (English)

    王戌勃; 武三安

    2014-01-01

    原产于南美的马缨丹绵粉蚧 Phenacoccus parvus Morrison 是一种广布热带的多食性害虫,在我国以前仅记录于香港和台湾。2008年4月发现该虫在云南景洪危害小米辣(Capsicum frutescens),2013年又在云南蒙自马缨丹(Lantana camara)上采到该虫,这是该虫在我国大陆的首次报道。文章介绍了马缨丹绵粉蚧的鉴别特征、寄主、分布、生物学和经济重要性等。%Phenacoccus parvus Morrison, a polyphagous pest originally from South America,is widely distributed in tropical areas. This mealybug had previously been recorded in Hong Kong and Taiwan but not on the Chinese mainland. However, it was found at two sites in Yunnan Province, on Capsicum frutescens in Jinghong in 2008 and Lantana camara in Mengzi in 2013. These are first records of P. parvus on mainland China. This paper provides a brief introduction of the morphological identification characteristics of this species, its distribution, host plants, biology and economic importance.

  4. Dust extinction from Balmer decrements of star-forming galaxies at 0.75

    CERN Document Server

    Domínguez, A; Henry, A L; Scarlata, C; Bedregal, A G; Malkan, M; Atek, H; Ross, N R; Colbert, J W; Teplitz, H I; Rafelski, M; McCarthy, P; Bunker, A; Hathi, N P; Dressler, A; Martin, C L; Masters, D

    2012-01-01

    Spectroscopic observations of Halpha and Hbeta emission lines of 129 star-forming galaxies in the redshift range 0.75Camara~3 (WFC3) on board the Hubble Space Telescope as part of the WFC3 Infrared Spectroscopic Parallel (WISP) survey. Interstellar dust extinction is derived from stacking the Halpha/Hbeta flux ratio, the Balmer decrement, as a function of Halpha luminosity down to LHa ~ 3 x 10^{41} erg s^{-1}, galaxy stellar mass down to M_{*} ~ 4 x 10^{8} Msun, and rest-frame Halpha equivalent width. The faintest galaxies are five times fainter in Halpha luminosity than galaxies previously studied at z ~ 1.5. We provide empirical relations to correct for the effect of dust extinction in star-forming galaxies as a function of Halpha luminosity and stellar mass. A clear evolution is observed where galaxies of the same Halpha luminosity have lower extinction at higher redshifts, whereas ...

  5. Metal temperature monitoring in corrosive gases at high temperature and high thermal flows; Monitoreo de temperaturas de metal en gases corrosivos a alta temperatura y altos flujos termicos

    Energy Technology Data Exchange (ETDEWEB)

    Huerta Espino, Mario; Martinez Flores, Marco Antonio; Martinez Villafane, Alberto; Porcayo Calderon, Jesus; Gomez Guzman, Roberto; Reyes Cervantes, Fernando [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    The direct measurement of metal temperatures during operation in superheater, reheater, and water wall tubes in zones exposed to high thermal flows is of great interest for the operation and analysis of the correct functioning of a steam generator. The operation temperature measurement of these zones differs very much of the monitored temperature in headers in the dead chamber, since the temperature measured in this zone is the steam temperature that does not reflect the one detected in the gas zone. For this reason, the thermocouples implant in gas zones will detect the real metal temperature and the incidence that some operation variables might have on it (Martinez et al., (1990). [Espanol] La medicion directa de temperaturas de metal durante operacion en tubos de sobrecalentador, recalentador y pared de agua en zonas expuestas a altos flujos termicos es de gran interes para la operacion y analisis del buen funcionamiento de un generador de vapor. La medicion de la temperatura de operacion de estas zonas, difiere mucho de la temperatura monitoreada en cabezales en zona de camara muerta, ya que la temperatura registrada en esta zona es la de vapor que no es un reflejo de la detectada en zona de gases. Por esta razon, la implantacion de termopares en zona de gases detectara la temperatura de metal real y la incidencia que algunas variables de operacion tengan sobre esta (Martinez et al., 1990).

  6. Merger of aspects of the 'Programa Luz para Todos' in the regulation of ANEEL; Incorporacao de aspectos do Programa Luz para Todos na regulacao da ANEEL

    Energy Technology Data Exchange (ETDEWEB)

    Camargo, Ednaldo Jose Silva de [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia; Ribeiro, Fernando Selles [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica

    2009-07-01

    This study aims to examine the relationship between concessionaire and requesting public service of electric energy from the changes brought about by the 'Programa Luz para Todos', for residents of rural areas. The concept of access to electricity as a right for all Brazilians and as an essential right of citizenship, also studying processing of legislation in order to accomplish this right. Examines the advances offered by the 'Programa Luz para Todos' - both in terms of social inclusion which provides, as the increase in energy demand and consequent increase of the distribution market - which regulation is based on document entitled 'Manual de Operationalizacao' and was formally accepted by utilities to distribute power and cooperatives in rural electrification. Presents a discussion about the same subject under the 'Poder Legislativo', in a bill in the 'Camara Federal' procedure. Demonstrates the existence of a desire for maintaining the progress achieved in various spheres of government. Proposes ANEEL's incorporation of some aspects of the modern setting, in particular with regard to the concept of the 'Ponto de Entrega' as defined in Article 9 of Resolution 456/00. (author)

  7. NASALIZATION IN BRAZILIAN PORTUGUESE: AN AUTOSEGMENTAL (REVIEW

    Directory of Open Access Journals (Sweden)

    Consuelo de Paiva Godinho COSTA

    2015-06-01

    Full Text Available We propose to make a brief review on nasalization phenomena studies in Portuguese, aiming the phonological process of nasal harmonization that occurs in the variety of Brazilian Portuguese spoken in Vitória da Conquista-BA and region, a phenomenon hitherto not described for any Portuguese dialect. To do so, we consider as fundamental, D’Angelis (2002 analysis, which incorporates relevant concepts presented by Trubetzkoy, from the Prague School, and some points of Camara Jr. propose. We also propose to update the discussion with the approaches along the lines of auto segmental phonology, incorporating some insights of Piggott (1992, discussing with other analyzes for nasalization phenomena in other languages, especially Guarani (language of Tupi-Guarani Linguistic Family, as proposed by Costa (2010, which deals with the phonological processes involving nasality and nasal harmony in Brazilian indigenous languages , in order to verify if the researches on nasality phenomena in other languages can shed some light on the processes that occur in Portuguese.

  8. Evaluation of the Larvicidal Efficacy of Five Indigenous Weeds against an Indian Strain of Dengue Vector, Aedes aegypti L. (Diptera: Culicidae).

    Science.gov (United States)

    Sharma, Aarti; Kumar, Sarita; Tripathi, Pushplata

    2016-01-01

    Background and Objectives. Aedes aegypti, dengue fever mosquito, is primarily associated with the transmission of dengue and chikungunya in tropical and subtropical regions of the world. The present investigations were carried out to assess the larvicidal efficiency of five indigenous weeds against Ae. aegypti. Methods. The 1,000 ppm hexane and ethanol extracts prepared from the leaves and stem of five plants (Achyranthes aspera, Cassia occidentalis, Catharanthus roseus, Lantana camara, and Xanthium strumarium) were screened for their larvicidal activity against early fourth instars of dengue vector. The extracts which could cause 80-100% mortality were further investigated for their efficacy. Results. The preliminary screening established the efficacy of hexane extracts as compared to the ethanol extracts. Further investigations revealed the highest larvicidal potential of A. aspera extracts exhibiting LC50 value of 82.555 ppm and 68.133 ppm, respectively. Further, their leaf extracts showed 5-85.9% higher larvicidal activity and stem extracts exhibited 0.23- to 0.85-fold more efficiency than the other four extracts. Conclusion. The present investigations suggest the possible use of A. aspera as an ideal ecofriendly, larvicidal agent for the control of dengue vector, Ae. aegypti. Future studies are, however, required to explore and identify the bioactive component involved and its mode of action. PMID:26941996

  9. Evaluation of the Larvicidal Efficacy of Five Indigenous Weeds against an Indian Strain of Dengue Vector, Aedes aegypti L. (Diptera: Culicidae

    Directory of Open Access Journals (Sweden)

    Aarti Sharma

    2016-01-01

    Full Text Available Background and Objectives. Aedes aegypti, dengue fever mosquito, is primarily associated with the transmission of dengue and chikungunya in tropical and subtropical regions of the world. The present investigations were carried out to assess the larvicidal efficiency of five indigenous weeds against Ae. aegypti. Methods. The 1,000 ppm hexane and ethanol extracts prepared from the leaves and stem of five plants (Achyranthes aspera, Cassia occidentalis, Catharanthus roseus, Lantana camara, and Xanthium strumarium were screened for their larvicidal activity against early fourth instars of dengue vector. The extracts which could cause 80–100% mortality were further investigated for their efficacy. Results. The preliminary screening established the efficacy of hexane extracts as compared to the ethanol extracts. Further investigations revealed the highest larvicidal potential of A. aspera extracts exhibiting LC50 value of 82.555 ppm and 68.133 ppm, respectively. Further, their leaf extracts showed 5–85.9% higher larvicidal activity and stem extracts exhibited 0.23- to 0.85-fold more efficiency than the other four extracts. Conclusion. The present investigations suggest the possible use of A. aspera as an ideal ecofriendly, larvicidal agent for the control of dengue vector, Ae. aegypti. Future studies are, however, required to explore and identify the bioactive component involved and its mode of action.

  10. Seed dispersal networks in the Galápagos and the consequences of alien plant invasions.

    Science.gov (United States)

    Heleno, Ruben H; Olesen, Jens M; Nogales, Manuel; Vargas, Pablo; Traveset, Anna

    2013-01-01

    Alien plants are a growing threat to the Galápagos unique biota. We evaluated the impact of alien plants on eight seed dispersal networks from two islands of the archipelago. Nearly 10 000 intact seeds from 58 species were recovered from the droppings of 18 bird and reptile dispersers. The most dispersed invaders were Lantana camara, Rubus niveus and Psidium guajava, the latter two likely benefiting from an asynchronous fruit production with most native plants, which facilitate their consumption and spread. Lava lizards dispersed the seeds of 27 species, being the most important dispersers, followed by small ground finch, two mockingbirds, the giant tortoise and two insectivorous birds. Most animals dispersed alien seeds, but these formed a relatively small proportion of the interactions. Nevertheless, the integration of aliens was higher in the island that has been invaded for longest, suggesting a time-lag between alien plant introductions and their impacts on seed dispersal networks. Alien plants become more specialized with advancing invasion, favouring more simplified plant and disperser communities. However, only habitat type significantly affected the overall network structure. Alien plants were dispersed via two pathways: dry-fruited plants were preferentially dispersed by finches, while fleshy fruited species were mostly dispersed by other birds and reptiles. PMID:23173203

  11. Assessing Habitat Quality of Forest-Corridors through NDVI Analysis in Dry Tropical Forests of South India: Implications for Conservation

    Directory of Open Access Journals (Sweden)

    Paramesha Mallegowda

    2015-02-01

    Full Text Available Most wildlife habitats and migratory routes are extremely threatened due to increasing demands on forestland and forest resources by burgeoning human population. Corridor landscape in Biligiri Rangaswamy Temple Tiger Reserve (BRT is one among them, subjected to various anthropogenic pressures. Human habitation, intensive farming, coffee plantations, ill-planned infrastructure developments and rapid spreading of invasive plant species Lantana camara, pose a serious threat to wildlife habitat and their migration. Aim of this work is to create detailed NDVI based land change maps and to use them to identify time-series trends in greening and browning in forest corridors in the study area and to identify the drivers that are influencing the observed changes. Over the four decades in BRT, NDVI increased in the core area of the forest and reduced in the fringe areas. The change analysis between 1973 and 2014 shows significant changes; browning due to anthropogenic activities as well as natural processes and greening due to Lantana spread. This indicates that the change processes are complex, involving multiple driving factors, such as socio-economic changes, high population growth, historical forest management practices and policies. Our study suggests that the use of updated and accurate change detection maps will be useful in taking appropriate site specific action-oriented conservation decisions to restore and manage the degraded critical wildlife corridors in human-dominated landscape.

  12. Substrate temperature study in the crystallinity of BaTiO{sub 3} thin films; Estudio de la temperatura de crecimiento sobre la cristalinidad en peliculas delgadas de BaTiO{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Marquez-Herrera, Alfredo [Coordinacion Academica Region Altiplano (COARA), Universidad Autonoma de San Luis Potosi, San Luis Potosi (Mexico)]. E-mail: amarquez@mixteco.utm.mx; Hernandez-Rodriguez, Eric Noe; Zapata-Torres, Martin Guadalupe [Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Unidad Legaria, Instituto Politecnico Nacional (Mexico)]. E-mails: noehmx@hotmail.com; mzapatat@ipn.mx; Cruz-Jauregui, Maria de la Paz [Centro de Nanociencias y Nanotecnologia, Universidad Nacional Autonoma de Mexico (Mexico)]. E-mail: mcruz@cnyn.unam.mx; Melendez-Lira, Miguel angel [Centro de Investigacion y de Estudios Avanzados, Instituto Politecnico Nacional (Mexico)]. E-mail: mlira@fis.cinvestav.mx

    2013-07-15

    Ferroelectric thin films of BaTiO{sub 3} (BTO) were grown on quartz and nichrome substrates using a BaTiO{sub 3} target by RF-Sputtering technique. It was studied the effect of the substrate temperature in the crystallization of the material. These samples were compared with films deposited at room temperature and heat treated out of the growth Chamber. Their crystallinity were studied by X-ray diffraction. Additionally, the optical characterizations were carried out by UV-Vis spectrophotometer. The growth of thin films with substrate temperature allows the obtaining of crystalline materials at temperatures below those reported by other authors. [Spanish] Peliculas delgadas Ferroelectricas de BaTiO{sub 3} (BTO) se depositaron a partir de un blanco de BaTiO{sub 3} mediante la tecnica de RF-Sputtering (erosion catodica por radio frecuencia) sobre substratos de nicromel y cuarzo. Se estudio el efecto de la temperatura de sustrato in-situ en la cristalinidad del material durante su deposito. Estas muestras fueron comparadas con peliculas depositadas a temperatura ambiente y tratadas termicamente posterior al deposito fuera de la camara de crecimiento. El estudio de la cristalinidad fue realizado mediante la tecnica de difraccion de rayos-X. Adicionalmente, se llevaron a cabo caracterizaciones opticas mediante un espectrofotometro UV-Vis. El crecimiento de peliculas delgadas con temperatura de sustrato permite la obtencion de materiales cristalinos a temperaturas por debajo de las reportadas por otros autores.

  13. Quality Characteristics of Wholemeal Flour and Bread from Durum Wheat (Triticum turgidum L subsp. durum Desf.) after Field Treatment with Plant Water Extracts.

    Science.gov (United States)

    Carrubba, Alessandra; Comparato, Andrea; Labruzzo, Andrea; Muccilli, Serena; Giannone, Virgilio; Spina, Alfio

    2016-09-01

    The use of selected plant water extracts to control pests and weeds is gaining growing attention in organic and sustainable agriculture, but the effects that such extracts may exert on the quality aspects of durum wheat are still unexplored. In 2014, 5 plant water extracts (Artemisia arborescens, Euphorbia characias, Rhus coriaria, Thymus vulgaris, Lantana camara) were prepared and distributed on durum wheat cv Valbelice to evaluate their potential herbicidal effects. After crop harvesting, the major physicochemical and technological parameters of wholemeal flours obtained from each treatment were measured and compared with those from chemical weeding and untreated controls. A baking test was also performed to evaluate the breadmaking quality. In wholemeal flours obtained after the treatment with plant extracts protein and dry gluten content were higher than in control and chemical weeding. Wholemeal flours obtained after chemical weeding reached the highest Mixograph parameters, and that from durum wheat treated with R. coriaria extract demonstrated a very high α-amylase activity. We concluded that the treatments with plant water extracts may influence many quality traits of durum wheat. This occurrence must be taken into account in overall decisions concerning the use of plant extracts in pest and weed management practice.

  14. Research proposal: evaluation of the ART approach in elderly patients Protocolo de pesquisa: avaliação do Tratamento Restaurador Atraumático em pacientes idosos

    Directory of Open Access Journals (Sweden)

    Tiago Rabello

    2006-01-01

    Full Text Available With the increase of life expectancy in the world's population, oral health care of elderly people has attracted considerably more attention over the last years. Many elderly may benefit from oral health promotion measures that involve the Atraumatic Restorative Treatment (ART approach. The purpose of this study will be to evaluate, over 3 years of follow-up, the clinical behavior of atraumatic restorations placed in elderly patients. The study will comprise a structured interview, intraoral clinical examination, oral hygiene instructions and the atraumatic restorative treatment. Intraoral examination will be carried out as recommended by the World Health Organization (WHO. Small to medium size class I, II or V cavities without pulp involvement and spontaneous painful symptomatology will be selected to undergo the atraumatic restorative treatment. The restorations will be evaluated by direct observation at baseline and after 6, 12, 24 and 36 months, using modified USPHS criteria. Two dentists with training and expertise in the ART approach, but who will not participate in the ART procedures, will evaluate the restorations.Com o aumento da expectativa de vida da população mundial, a saúde bucal do idoso tem recebido maior atenção nos últimos anos. Muitos idosos podem ser beneficiados por meio de ações de promoção de saúde bucal onde esteja incluído o Tratamento Restaurador Atraumático (TRA. Este estudo terá como proposta avaliar o comportamento clínico de restaurações atraumáticas em pacientes idosos, por um período de 3 anos. O estudo incluirá uma entrevista estruturada, exame clínico bucal, instruções de higiene oral e o tratamento restaurador atraumático. O método utilizado para o exame bucal será o preconizado pela Organização Mundial de Saúde (OMS. Cavidades classe I, II ou V pequenas ou médias, sem envolvimento pulpar nem sintomatologia dolorosa espontânea serão selecionadas para o tratamento restaurador

  15. Evaluation of the hydrogen peroxide and special colorant effects under irradiation by argon and diode laser on tooth-whitening in vitro

    International Nuclear Information System (INIS)

    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/cm2 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/cm2 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

  16. In vitro evaluation of marginal microleakage in class V restorations with composite resin in bovine teeth. Laser irradiation influences and the adhesive system in the dentin pre-treatment

    International Nuclear Information System (INIS)

    Microleakage is one of the most important reasons to restorations failure, it is the responsible for marginal colors changing, new caries, hipersensibility and pulpar diseases. Several techniques and materials have been studied to eliminate or, at least, to decrease microleakage. The cavities preparation with Er:YAG laser and autoconditioning adhesive are some of these techniques and materials. This research has the objective to compare, in vitro, microleakage in class V cavities, prepared with high rotation (conventional treatment), Er:YAG laser (Enamel-400 mj/2 Hz/128,38 J/Cm2, Dentin 250 mJ/ 2 Hz/ 80,24 J/Cm2) and the treatment made at dentin with autoconditioning adhesive (Clerafil SE Bond) using Er:YAG laser (with water or not water) or not using Er:YAG laser. It was used 48 bovines teeth with cavities prepared in vestibular face and gingival wall on cement enamel junction and oclusal wall on enamel. The materials used were autoconditioning adhesive (Clerafil SE Bond) and composite resin Z250. Teeth were divided into four groups of twelve samples each one, according to dentin treatment. Group 1 - Conventional cavity and autoconditioning adhesive. Group 2- Cavity prepared with Er: YAG laser and autoconditioning adhesive. Group 3 - Cavity prepared with Er:YAG laser and dentin conditioning with Er:YAG laser associated to water and autoconditioning adhesive. Group 4 - Cavity prepared with Er:YAG laser and dentin conditioning with Er: YAG laser without water and associated to autoconditioning adhesive. Teeth were restored and stocked at 37 deg C, thermocycled and placed into a 50% silver nitrate solution. Right after, teeth were sliced and evaluated on a stereo microscopic magnifying glass in order to see microleakage degree trying to follow a score from 0 to 3. The findings were submitted to Fisher, Anderson-Darling tests and to the not parametric Sen and Puri test. The results indicated that in gingival edge, the Group 2 showed less microleakage than others ones

  17. Potassium-titanyl-phosphate (KTP Laser and Dental Bleaching. Literature review.

    Directory of Open Access Journals (Sweden)

    Consuelo Arce

    2013-12-01

    Full Text Available ABSTRACT Objective: To determinate if dental bleaching with KTP laser is a safe, effective and efficient technique. The use of KTP laser for dental bleaching was only investigated in combination with a high concentration of hydrogen peroxide (35%. The recommended protocol was: for the use of KTP laser at 3W power and an irradiation time of ten seconds, three to four cycles are needed. For a power of 1W and an irradiation time of thirty seconds the number of cycles is three with a maximum of four. Under these conditions KTP laser bleaching was considered not to alter surface morphology, to have no influence on enamel microhardness, to maintain the pulp temperature within normal values, to obtain lighter tooth color which can be maintained for months (no long term studies were conducted. Because the bleaching effect was obtained in a short period of time and maintained for months, KTP laser bleaching was considered an effective and efficient technique. Conclusion: KTP-assisted dental bleaching is a safe, effective and efficient technique when combined with high concentration of hydrogen peroxide. RESUMEN Láser Potasio-Titanil-Fosfato (KTP y Blanqueamiento Dental. Revisión narrativa.Resumen: Objetivo: Determinar si el blanqueamiento dental con láser KTP es una técnica segura, efectiva y eficiente. El uso de láser KTP para blanqueamiento dental fue solo investigado en combinación con una alta concentración de peróxido de hidrogeno (35%. El protocolo recomendado fue: para el uso de láser KTP a 3W de potencia y un tiempo de irradiación de diez segundos, tres a cuatro repeticiones son necesarias. Para una potencia de 1W y un tiempo de irradiación de treinta segundos, el número de repeticiones son tres con un máximo de cuatro veces. Bajo estas condiciones, el blanqueamiento dental con esta técnica no altera la morfología de la superficie dental, no tiene influencia en la microdureza del esmalte, mantiene la temperatura pulpar dentro de

  18. Apical and periapical repair of dogs' teeth with periapical lesions after endodontic treatment with different root canal sealers Reparação apical e periapical de dentes de cães com lesão periapical crônica após tratamento endodôntico utilizando diferentes materiais obturadores

    Directory of Open Access Journals (Sweden)

    Mário Roberto Leonardo

    2003-03-01

    Full Text Available The aim of this study was to evaluate the apical and periapical repair after root canal treatment of dogs' teeth with pulp necrosis and chronic periapical lesion using different root canal sealers. After periapical lesion induction, forty-four root canals of 3 dogs were submitted to biomechanical preparation using 5.25% sodium hypochlorite as an irrigating solution. A calcium hydroxide dressing (Calen PMCC was applied for 15 days and the root canals were filled using the lateral condensation technique with gutta-percha points and Sealapex, AH Plus or Sealer Plus for sealing. After 180 days, the animals were sacrificed by anesthetic overdose and the obtained histological sections were stained with hematoxylin-eosin for optical microscopic analysis of the apical and periapical repair. The groups filled with Sealapex and AH Plus had better histological repair (p O objetivo do presente estudo foi avaliar a reparação apical e periapical pós-tratamento endodôntico de dentes de cães com necrose pulpar e reação periapical crônica, em que se utilizaram diferentes materiais obturadores. Foram utilizados 44 canais radiculares, nos quais, após indução das lesões periapicais, foi efetuado o preparo biomecânico empregando-se como solução irrigadora uma solução de hipoclorito de sódio a 5,25%. Após curativo de demora com pasta à base de hidróxido de cálcio (Calen PMCC, mantida no canal radicular durante 15 dias, os canais radiculares foram obturados pela técnica clássica complementada pela condensação lateral ativa, empregando-se os cimentos Sealapex, AH Plus ou Sealer Plus. Decorrido o período de 180 dias, os animais foram mortos e as peças submetidas ao processamento laboratorial. Os cortes histológicos obtidos foram corados com hematoxilina-eosina. A análise histopatológica demonstrou que nos canais radiculares obturados com os cimentos Sealapex e AH Plus ocorreu melhor reparação (p < 0,05 do que nos canais obturados com o

  19. Avaliação da infiltração marginal de materiais restauradores adesivos em dentes decíduos Evaluation of the microleakage of restorative materials in deciduous teeth

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo CARRARA

    2001-06-01

    Full Text Available Analisou-se a infiltração marginal nas paredes cervical e oclusal de cavidades classe V, preparadas na face vestibular de 40 caninos decíduos extraídos e restauradas com os materiais Chelon-Fil, Vitremer, Compoglass-F e Z100. Compararam-se ainda dois métodos de avaliação da penetração do corante no teste de infiltração: escore e medida linear até a parede da câmara pulpar. Os espécimes passaram por ciclagem térmica de 500 ciclos nas temperaturas de 5 e 55ºC, foram imersos em solução de fucsina básica a 0,5% por 24 horas e seccionados para visualização da infiltração marginal nas paredes cervical e oclusal. Observou-se que o Chelon-Fil apresentou maior grau de infiltração que os demais materiais. Vitremer, Compoglass-F e Z100 apresentaram infiltração semelhante. O Chelon-Fil e o Vitremer apresentaram infiltração maior na parede cervical que na oclusal, fenômeno este que não ocorreu com o Compoglass-F e a Z100, que apresentaram infiltração semelhante em ambas as paredes. Não houve diferença entre os métodos de avaliação da penetração do corante (p The microleakage of Chelon-Fil, Vitremer, Compoglass-F and Z100 was evaluated in deciduous teeth. Class V restorations were placed in the buccal aspect of 40 extracted primary canines; they were thermocycled, and immersed in 0.5% basic fuchsin. Three slices of each tooth were obtained in order to analyze the penetration of dye in the gingival and occlusal walls, under magnification of 40 X. The results showed that Chelon-Fil had the highest degree of marginal leakage. Vitremer, Compoglass-F and Z100 presented similar penetration of dye. The microleakage of Chelon-Fil and Vitremer was greater in the gingival wall than in the occlusal wall. Microleakage was the same in both gingival and occlusal walls when cavities were filled, either with Z100 or with Compoglass-F.

  20. In vitro evaluation of marginal microleakage in class V restorations with composite resin in bovine teeth. Laser irradiation influences and the adhesive system in the dentin pre-treatment; Avaliacao in vitro da microinfiltracao marginal em restauracoes de classe V com resina composta em dentes bovinos. Influencia da irradiacao laser e sistema adesivo no pre-tratamento dentinario

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Wendell Lima de

    2003-07-01

    Microleakage is one of the most important reasons to restorations failure, it is the responsible for marginal colors changing, new caries, hipersensibility and pulpar diseases. Several techniques and materials have been studied to eliminate or, at least, to decrease microleakage. The cavities preparation with Er:YAG laser and autoconditioning adhesive are some of these techniques and materials. This research has the objective to compare, in vitro, microleakage in class V cavities, prepared with high rotation (conventional treatment), Er:YAG laser (Enamel-400 mj/2 Hz/128,38 J/Cm{sup 2}, Dentin 250 mJ/ 2 Hz/ 80,24 J/Cm{sup 2}) and the treatment made at dentin with autoconditioning adhesive (Clerafil SE Bond) using Er:YAG laser (with water or not water) or not using Er:YAG laser. It was used 48 bovines teeth with cavities prepared in vestibular face and gingival wall on cement enamel junction and oclusal wall on enamel. The materials used were autoconditioning adhesive (Clerafil SE Bond) and composite resin Z250. Teeth were divided into four groups of twelve samples each one, according to dentin treatment. Group 1 - Conventional cavity and autoconditioning adhesive. Group 2- Cavity prepared with Er: YAG laser and autoconditioning adhesive. Group 3 - Cavity prepared with Er:YAG laser and dentin conditioning with Er:YAG laser associated to water and autoconditioning adhesive. Group 4 - Cavity prepared with Er:YAG laser and dentin conditioning with Er: YAG laser without water and associated to autoconditioning adhesive. Teeth were restored and stocked at 37 deg C, thermocycled and placed into a 50% silver nitrate solution. Right after, teeth were sliced and evaluated on a stereo microscopic magnifying glass in order to see microleakage degree trying to follow a score from 0 to 3. The findings were submitted to Fisher, Anderson-Darling tests and to the not parametric Sen and Puri test. The results indicated that in gingival edge, the Group 2 showed less microleakage than

  1. Emprego do óleo de Melaleuca alternifolia Cheel (Myrtaceae na odontologia: perspectivas quanto à utilização como antimicrobiano alternativo às doenças infecciosas de origem bucal Use of Melaleuca alternifolia Cheel (Myrtaceae oil in dentistry: perspectives on its use as alternative antimicrobial to infectious diseases of oral origin

    Directory of Open Access Journals (Sweden)

    A.C.M. Oliveira

    2011-01-01

    Full Text Available O interesse por medicamentos alternativos, principalmente daqueles provenientes de extratos naturais, tem aumentado nas últimas décadas. A Melaleuca alternifolia é um arbusto pertencente ao gênero Melaleuca, popularmente conhecida como "árvore de chá", cujo principal produto é o óleo essencial (TTO - tea tree oil, de grande importância medicinal por possuir comprovada ação bactericida e antifúngica contra diversos patógenos humanos. Em virtude da atividade terapêutica em diversas especialidades médicas, o TTO passou a ser empregado na área odontológica. Esta revisão de literatura foi realizada com o objetivo de discutir os ensaios já realizados com o TTO contra microrganismos relacionados à doença cárie, doença periodontal e problemas pulpares. O óleo de Melaleuca tem demonstrado boa ação antibacteriana in vitro contra microrganismos bucais, porém, pesquisas envolvendo o estudo do mecanismo de ação sobre as células microbianas ou estudos in vivo ainda são escassos e precisam ser realizados, já que esse produto pode ser útil na odontologia, seja na manutenção química da higiene ou prevenção de doenças bucais.The interest in alternative medicines, especially those from natural extracts, has increased in recent decades. Melaleuca alternifolia is a shrub belonging to the genus Melaleuca, popularly known as "tea tree", the main product of which is its essential oil (TTO - tea tree oil, of great medicinal importance for its proven bactericidal and antifungal activity against several human pathogens. By virtue of its therapeutic activity in various medical specialties, TTO is now used in dentistry. This literature review was conducted in order to discuss the tests already carried out with TTO against microorganisms related to dental caries, periodontal disease and pulpal problems. Melaleuca oil has shown good in vitro antibacterial activity against oral microorganisms; however, research involving the study of its

  2. The dental cavities of equine cheek teeth: three-dimensional reconstructions based on high resolution micro-computed tomography

    Directory of Open Access Journals (Sweden)

    Kopke Susan

    2012-09-01

    commonly seen in teeth ≤5 years. A segmented pulp system was found in 72% of the investigated teeth. Segmentation into separate mesial and distal pulp compartments was most commonly present. Pulp horn 4 coalesced either with the mesial pulp horns 1 and 3 or with the distal pulp horns 2 and 5. Conclusions Details of the pulpar anatomy of equine cheek teeth are provided, supporting the continuous advancement in endodontic therapy. Numerous individual configurations of the pulp system were obtained in maxillary cheek teeth, but much less variability was seen in mandibular cheek teeth.

  3. Manejo estético y endodóncico de dientes con formación radicular incompleta

    Directory of Open Access Journals (Sweden)

    L.A. Dávila Rodríguez

    2013-08-01

    Full Text Available La necrosis pulpar es una de las principales complicaciones de los traumatismos dentales lo que implica en un diente inmaduro la interrupción de la maduración de la raíz y el cierre apical. Una terapia llamada "apexificación" se requiere para inducir la formación de una barrera calcificada apical permitiendo un relleno permanente y hermético de la raíz. Numerosos materiales han sido recomendados para inducir apexificación y conservar la estética en dientes con ápices inmaduros como el mineral trióxido agregado (MTA, el hidróxido de calcio [Ca (OH2], los postes de fibra de vidrio y entre los diversos materiales utilizados en prótesis, la cerámica que reproduce la apariencia de la dentición natural y tiene un comportamiento óptico muy similar a la de los tejidos duros dentales. El presente caso reporta paciente masculino de 17 años de edad con fractura coronaria complicada, conducto radicular expuesto a cavidad oral con formación radicular incompleta. El objetivo del presente caso clínico es describir la apexificación como primera alternativa para mantener un diente útil, utilizando la formación de una barrera apical con mineral trióxido agregado (MTA y recuperar la estética del paciente. Conclusiones: La medicación intraconducto adecuada para la inducción a la formación de un cierre apical en un diente inmaduro o con formación radicular incompleta, es de trascendental importancia para el éxito del proceso de apexificación en donde juega un papel importante el MTA ya que en la actualidad es el material que brinda más ventajas en esta práctica como inductor de dicho proceso.

  4. 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

  5. Xenodiagnóstico na doença de Chagas crônica: I- Sensibilidade de Panstrongylus megistus e Triatoma infestans

    Directory of Open Access Journals (Sweden)

    José Borges-Pereira

    1996-08-01

    Full Text Available De janeiro de 1986 a fevereiro de 1994foram aplicados 563 xenodiagnósticos (XD em igual número de pacientes chagásicos crônicos de diferentes áreas do Brasil; 292 mulheres e 271 homens com idades entre 6 e 89 anos (média = 41,4 ± 14, 7 anos. Em cada XD foram empregadas 40 ninfas no 4S estádio: 20 de Panstrongylus megistus (Pm e 20 de Triatoma infestans (Ti em jejum de pelo menos 14 dias. O exame de cada ninfa foi realizado 45 dias depois de aplicada no paciente, através da observação por microscopia óptica das fezes e/ou do triturado do tubo digestivo. Foram observados os seguintes resultados: a XD positivos em 205 (36,4% pacientes, sendo 85 (15,1% devido exclusivamente às ninfas de Pm, 44 (7,8% devido às de Ti e 76 (13,5% devido a ambas Pm e Ti; b positividade em 4,9% das ninfas de Pm e em 3,0% das ninfas de Ti. A análise destes resultados mostrou que as ninfas de Pm foram mais sensíveis do que as de Ti à infecção pelo Trypanosoma cruzi, aumentando significativamente a xenopositividade, independentemente da área de origem, sexo e faixa etária dos pacientes. Estes resultados indicam que, para aumentar o rendimento do XD na doença de Chagas crônica, este exame deve conter mais de uma espécie de triatomíneo com diferentes sensibilidades à infecção pelo T. cruzi e, no caso de uso de apenas uma espécie, as ninfas IV de Pm devem substituir as ninfas IV de Ti.

  6. AVALIAÇÃO ECONÔMICA DA IMPLANTAÇÃO DE TURBINAS EÓLICAS POR MEIO DA ANÁLISE DE RISCOS

    Directory of Open Access Journals (Sweden)

    Carolina Rossetto

    2015-12-01

    Full Text Available DOI: 10.12957/cadest.2015.18881Resumo As energias renováveis estão se propagando aceleradamente em países desenvolvidos e emergentes devido à sua forma sustentável e à sua produção limpa. Dentre elas, a energia eólica se destaca pelo mínimo impacto causado ao meio ambiente na construção e instalação de aerogeradores. Nesse contexto, devido ao excelente potencial eólico no Sul do Brasil, o objetivo deste trabalho é realizar uma análise de viabilidade econômica da implantação de um parque eólico a fim de abastecer uma indústria de alimentos e bebidas, localizada no Rio Grande do Sul, tornando-a autoprodutora em energia elétrica. Para este estudo foram utilizados os métodos de análise econômica Valor Presente Líquido (VPL, Taxa Interna de Retorno (TIR e Payback descontado. Os resultados apresentados por estes indicadores mostraram a viabilidade econômica do projeto. Foi estruturada também a análise de riscos do projeto através da Simulação de Monte Carlo, a qual apresentou um potencial elevado de risco envolvido no investimento deste parque eólico, devido, principalmente, à alta sensibilidade do VPL quanto à variabilidade das condições do vento na região em estudo. Palavras-chave: Parque Eólico; Análise de Viabilidade Econômica; Simulação de Monte Carlo.

  7. Vegetation recovery assessment following large wildfires in the Mediterranean Basin

    Science.gov (United States)

    Bastos, A.; Gouveia, C. M.; Trigo, R. M.; DaCamara, C. C.

    2012-04-01

    fire season considered in this study. The influence of driving factors such as pre-fire land-cover type and fire damage on vegetation recovery was assessed by means of a spatial analysis on recovery time fields. Finally, post-fire behaviour of vegetation over the selected regions and the role of the driving factors were compared. This work draws attention to the fact that the simple model applied by Bastos et al. (2011) to monitor vegetation recovery in Portugal following large wildfires is still applicable over other Mediterranean regions using coarse resolution remotely sensed data. Bastos A., Gouveia C., DaCamara C.C., and Trigo R.M.: Modelling post-fire vegetation recovery in Portugal. Biogeosciences, 8, 4559-4601, 2011. Gouveia C., DaCamara C.C. and Trigo R.M.: Post fire vegetation recovery in Portugal based on SPOT-VEGETATION data. Natural Hazards and Earth System Sciences, 10, 673-684, 2010. Malkinson D., Wittenberg, L., Beeri O. and Barzilai R.: Effects of repeated fires on the structure, composition, and dynamics of Mediterranean maquis: Short- and long-term perspectives. Ecosystems, 14, 478-488, 2011.

  8. Drought impact on vegetation in pre and post fire events in Iberian Peninsula

    Science.gov (United States)

    Gouveia, C. M.; Bastos, A.; Trigo, R. M.; DaCamara, C.

    2012-04-01

    . The extreme water stress conditions to which vegetation is subject during drought events appear, therefore, to delay the regeneration process, which is to be expected since water availability is determinant to primary productivity. On the other hand, in the case of 2005 burnt areas, vegetation is more stressed and dryer in summer than in spring and, in general, fire damage is higher for pixels with higher vegetation density and higher moisture content during the months before the fire. These relationships are also related with the distinct vegetation behavior of the different land covers: in general, shrubland holds less quantity of very dry biomass, while needle leaf presents higher amounts of fairly dry biomass. Gouveia C., Trigo R.M., DaCamara C.C (2009) "Drought and Vegetation Stress Monitoring in Portugal using Satellite Data". Natural Hazards and Earth System Sciences, 9, 1-11 Gouveia C., DaCamara C.C, Trigo R.M. (2010). "Post-fire vegetation dynamics in Portugal". Natural Hazards and Earth System Sciences, 10, 4, 673-684.

  9. The federal law of the Revenue Agency responsibility, the national oil industry and the determination of the average price of the Mexican mixture for export: implications and limitations; La ley federal de responsabilidad hacendaria, la industria petrolera nacional y la determinacion del precio promedio de la mezcla mexicana de exportacion: implicaciones y limitaciones

    Energy Technology Data Exchange (ETDEWEB)

    Baltierra, Lauro; Huerta, Carlos E.; Ruiz Alarcon, Fluvio Cesar [LX legislatura, Camara de Diputados, Mexico, D.F. (Mexico)

    2006-11-15

    en la economia del pais, al propiciar un proceso de financiarizacion del sector, asi como las implicaciones que se originan de la fijacion inamovible del precio del petroleo por disposicion legal. Como ello limita las potestades constitucionales de la Camara de Diputados al negarle la facultad, que ejercia hasta la expedicion de la Ley, para evaluar las estimaciones del Ejecutivo Federal respecto al precio promedio de la mezcla mexicana de exportacion. En el primer apartado se realiza un balance de como el Presupuesto de Egresos de la Federacion se proyecta como un instrumento para frenar la inversion publica en el sector petrolero. En el segundo se atienden aspectos relacionados con la estimacion de precio del petroleo a partir de la Ley de Federal de Presupuesto y Responsabilidad Hacendaria, senalando las incongruencias que significa establecer una formula para la determinacion del mismo. En un tercer apartado, se tratan la subvaluacion de los precios del crudo como factor clave para el uso discrecional de los excedentes petroleros. En el cuarto apartado, se analizan los Criterios Generales de Politica Economica para el ano 2007, que conforme a la nueva Ley Federal de Presupuesto y Responsabilidad Hacendaria fueron remitidos a la Camara de Diputados por el Ejecutivo Federal en el mes de abril. Por ultimo, se presentan las estimaciones de la mezcla mexicana de exportacion para 2007 que a consideracion de los autores oscilara entre 50 y 51 dolares como promedio anual.

  10. Dynamical Mechanisms and Variability of Dry and Wet Spells in Iberia

    Science.gov (United States)

    Liberato, Margarida L. R.; Montero, Irene; Gouveia, Célia

    2014-05-01

    Dry and wet spells in Iberia have widespread ecological and environmental negative impacts resulting in major socioeconomic damages such as crop yield losses or increasing forest fire risk [Gouveia et al. 2009; Amraoui et al. 2013] and flash flooding, urban inundations, landslides and associated human and infrastructure damages [Liberato et al. 2013]. The 20th century was characterized by a negative trend on precipitation and a positive trend on temperature in southern Europe. On the other hand recent results suggest that there are opposite tendencies in the duration of wet and dry spells over the Iberia. At the monthly and seasonal scales, the North Atlantic Oscillation (NAO), the Eastern Atlantic (EA) and the Scandinavian (SCAN) patterns are important large-scale variability modes that control the Iberian precipitation regime. The NAO modulates the westerly atmospheric flow by shifting the polar jet and the associated storm-tracks. At the sub-monthly scale, extratropical cyclones have a significant impact on Iberian climate and are one of the primary causes of extreme events occurrence over the region [Liberato et al. 2011; 2013]. In this work we investigate the connection between midlatitude cyclones and the onset and recurrent character of droughts, heavy precipitation and spell duration in Iberia. Our results confirm the links between unusual circulation patterns with these extreme events. Moreover we show how the frequency on the occurrence of extratropical cyclones on the Euro-Atlantic region is critical in explaining the tails of the precipitation distribution in Iberia. Acknowledgments: This work was partially supported by national funds through FCT (Fundação para a Ciência e a Tecnologia, Portugal) under project QSECA (PTDC/AAG-GLO/4155/2012). References: Amraoui M., M. L. R. Liberato, T. J. Calado, C. C. DaCamara, L. P. Coelho, R. M. Trigo, C. M. Gouveia (2013) Fire activity over Mediterranean Europe based on information from Meteosat-8. Forest

  11. (E)-C-Glicosil-2-estirilcromonas com potencial actividade antioxidante

    OpenAIRE

    Tomé, Sara Mirassol

    2010-01-01

    As 2-estirilcromonas, uma pequena classe de compostos heterocíclicos naturais, têm vindo a cativar o interesse dos químicos orgânicos devido às suas actividades biológicas, nomeadamente a actividade antioxidante. Por outro lado, nos últimos anos, a química dos compostos C-glicosilados, ainda pouco explorada, tem sofrido avanços muito significativos motivados pelo carácter hidrofílico e a estabilidade hidrolítica que a ligação C-glicosídica pode conferir a potenciais agentes farmacológicos, su...

  12. Avaliação da violência intradomiciliar na criança e no adolescente enuréticos Assessment of domestic violence against children and adolescents with enuresis

    OpenAIRE

    Melina C. Sapi; VASCONCELOS, JULIANA S.P.; Fernando G. Silva; Ronaldo Damião; Eloísio A. da Silva

    2009-01-01

    OBJETIVO: Descrever a frequência da violência doméstica praticada contra crianças e adolescentes brasileiros devido ao episódio enurético e os fatores de risco associados a ela. MÉTODOS: Foi realizado um estudo transversal envolvendo 149 pacientes com idades de entre 6 e 18 anos, diagnosticados com enurese noturna monossintomática primária. Durante uma entrevista semiestruturada com o paciente e seu responsável legal, foram obtidas informações sobre as características da violência doméstica e...

  13. Modelagem matemática e parâmetros qualitativos da secagem de folhas de capim-limão [Cymbopogon citratus (DC.) Stapf] Mathematical modeling and quality parameters of lemon grass [Cymbopogon citratus (DC.) Stapf] leaf drying

    OpenAIRE

    A.P. Martinazzo; Melo, E C; P.C. Corrêa; R.H.S. Santos

    2010-01-01

    A espécie Cymbopogon citratus, conhecida como capim-limão, é amplamente utilizada popularmente para fins medicinais e tem o uso nas indústrias farmacêuticas, alimentícias, de cosméticos e perfumaria. Devido à necessidade de conhecimentos específicos na área de pré-processamento, o presente trabalho tem a finalidade de equacionar e analisar alguns aspectos da secagem, que permitam prever as alterações na qualidade do produto. Folhas da referida espécie foram submetidas a cortes em diferentes c...

  14. Ecofisiologia da cerejeira (Prunus avium L.),composição fenólica e actividade antioxidante dos frutos

    OpenAIRE

    Gonçalves, Berta Maria de Carvalho

    2006-01-01

    Tese de Doutoramento em Engenharia Biológica e Ambiental No contexto da fruticultura moderna, a cerejeira (Prunus avium L.) tem uma elevada importância económica, havendo, por isso, a preocupação especial de formar árvores produtoras de cerejas com elevada qualidade, mas com porte mais ananicante devido aos elevados custos da mão-de-obra na colheita e noutras práticas culturais do pomar. Assim, a expansão e a exploração rentável desta cultura implicam a aquisição de conhecimentos, entre ou...

  15. The impact of sport turism in destination loyalty: the Estoril Coast (Portugal) promotion of recurrent major sporting events

    OpenAIRE

    Travassos, Diogo da Silva Branco Fernandes

    2008-01-01

    Tem vindo a surgir, cada vez com maior importância, o tema relacionado com o marketing para o destino turístico. Esta temática surge devido ao grande aumento da concorrência entre destinos. O principal objectivo de cada destino é o de desenvolver estratégias que permitam aproveitar ao máximo as suas potencialidades. Esta dissertação explora o impacto do turismo desportivo na fidelidade para com o destino turístico, estudando a promoção de grandes eventos desportivos recorrentes na Costa do...

  16. Composição terpénica e actividade antioxidante de plantas e óleos

    OpenAIRE

    Tavares, Ângela Paula Martinho

    2011-01-01

    Os efeitos benéficos para a saúde humana associados ao uso de plantas, assim como dos seus óleos essenciais ou extractos, têm sido reconhecidos desde a antiguidade. Actualmente tem-se verificado um interesse crescente em conhecer quais os compostos responsáveis por esses efeitos. O interesse pelos compostos bioactivos das plantas tem crescido devido à ideia, generalizada, de que os produtos naturais apresentam menor toxicidade e efeitos colaterais relativamente aos produtos de síntese. Estes ...

  17. Requisitos de qualidade em óleos essenciais : a importância das monografias da Farmacopeia Europeia e das normas ISO

    OpenAIRE

    Martins, Ana Paula; Nogueira, Teresa; Costa, Maria do Céu; Salgueiro, Lígia

    2011-01-01

    Os óleos essenciais são produtos naturais utilizados por diversas indústrias, entre as quais se destacam a indústria alimentar e a indústria farmacêutica. Devido à variabilidade inerente a todos os produtos naturais e também aos crescentes problemas de adulterações, este artigo tem por objectivo divulgar e chamar a atenção da importância das normas internacionais existentes, nomeadamente das monografias da Farmacopeia Europeia e das normas ISO, fazendo simultaneamente uma comparação dos princ...

  18. Reabilitação térmica e acústica de edifícios antigos

    OpenAIRE

    Gutierres, Valter Nuno dos Santos

    2015-01-01

    A reabilitação urbana tem vindo a ganhar relevo dentro do sector da construção, devido ao abrandamento da construção nova e o envelhecimento do parque habitacional. Porém, o investimento nesta área em Portugal é reduzido em comparação com os restantes países da Europa. Dois factores que explicam o reduzido investimento é a dificuldade em cumprir a actual legislação da construção e, a falta de informação acerca dos processos construtivos e materiais tradic...

  19. Avaliação da satisfação das necessidades energéticas e proteicas e desperdício alimentar de utentes internados no CHCB, EPE-Hospital Pêro da Covilhã

    OpenAIRE

    Pires, Daniela Cristina Veigas

    2012-01-01

    Resumo da tese: Introdução: Existe uma preocupação crescente com a ingestão alimentar dos utentes hospitalizados devido à elevada prevalência de malnutrição, com repercussões a nível individual e do desperdício gerado. Objetivos: Caracterizar utentes internados no Centro Hospitalar Cova da Beira, EPE - Hospital Pêro da Covilhã relativamente a dados antropométricos, ingestão energética e proteica, satisfação das necessidades, risco de malnutrição, desperdício alimentar, as suas causas e custo....

  20. LUXAÇÃO UNILATERAL CONGÊNITA DA PATELA EM FELINO: RELATO DE CASO

    OpenAIRE

    Patrícia Franciscone Mendes; Fabrício Bernardo de Jesus Brasil

    2011-01-01

    A luxação patelar caracteriza-se pelo deslocamento medial ou lateral, intermitente ou permanente da patela, pode ocorrer devido à hipoplasia do sulco troclear, deslocamento do quadríceps ou da crista tibial. Esta afecção pode ser de origem congênita, traumática, evolutiva ou sedentária, apresentando maior prevalência em cães de raças de pequeno porte sendo raramente diagnosticada em gatos. A sintomatologia é variável conforme o grau de luxação. O tratamento conservativo contempla repouso, adm...

  1. ANÁLISE DE PAISAGENS TURÍSTICAS DA PRAIA DE PONTA NEGRA (NATAL/RN) COM A UTILIZAÇÃO DE INDICADORES DE QUALIDADE VISUAL: UMA CONTRIBUIÇÃO PARA O TURISMO SUSTENTÁVEL

    OpenAIRE

    Ilton Araújo Soares; Carla Stefanea Cabral Medeiros; Antônio Sales Filho

    2014-01-01

    As paisagens estão entre os principais responsáveis pela atratividade dos destinos turísticos, ao mesmo tempo em que, muitas vezes, são degradadas devido a práticas ambientalmente insustentáveis da atividade turística. Diante desse contexto, esse trabalho tem como objetivo investigar a qualidade visual das paisagens turísticas da Praia de Ponta Negra (Natal/RN) e contribuir para seu uso de forma sustentável. Para isso, utilizou-se como suporte teórico o método sistêmico e como metodologia um ...

  2. Hiperqueratose palmo-plantar epidermolítica (Vörner) relato de caso e revisão da literatura Epidermolytic palmoplantar keratoderma (Vörner type) case report and revision of literature

    OpenAIRE

    Alexandre Bortoli Machado; Rafael Lenzi Tarnowsky; Roberto Moreira Amorim; Jorge José de Souza Filho; Marcelo Rigatti

    2002-01-01

    As queratodermias palmo-plantares familiares são doenças pouco comuns. As manifestações clínicas são variadas e exuberantes, atraindo a atenção dos dermatologistas. Apesar de sua maioria ser limitada à pele, algumas apresentam repercussões clínicas sistêmicas, sobretudo em derivados ectodérmicos. Devido à variabilidade clínica, bem como a mecanismos etiopatogênicos mal compreendidos, diversas classificações têm sido propostas. Nenhuma apresenta total aceitação universal, sendo comum a discord...

  3. A dislexia no Terceiro Ciclo: perspetiva dos principais intervenientes no contexto escolar

    OpenAIRE

    Ferreira, Martinha Vieira

    2012-01-01

    Atualmente, os professores deparam-se com a necessidade de trabalhar com turmas muito heterogéneas, nas quais estão incluídos alunos com dislexia que exigem uma atenção redobrada devido às necessidades individuais de aprendizagem. A dislexia é uma deficiência com uma incidência importante, estimando-se que de 10 a 15% dos jovens apresentam esta problemática, sendo que cerca de metade desta percentagem chega ao terceiro ciclo sem saber que as suas dificuldades de aprendizagem têm origem na ...

  4. Influência das condições ambientais nas espumas de alumínio

    OpenAIRE

    Tavares, Joana Isabel Machado

    2008-01-01

    As espumas de Alumínio de porosidade fechada obtidas por pulverotecnologia, têm como principais aplicações a indústria dos transportes, principalmente na indústria automóvel. Tal é devido ao facto de estes materiais apresentarem propriedades como baixa densidade, excelente capacidade de absorção de energia e amortecimento de ruído e vibrações, o que torna estes materiais excelentes para incorporar em estruturas ultra-leves, de absorção de energia e de amortecimento sonoro em...

  5. Localização ótima de potência eólica para integração no sistema elétrico português

    OpenAIRE

    Pereira, João Venceslau

    2014-01-01

    As energias renováveis apresentam características que lhes conferem preferência na realização de um despacho económico, no entanto, tendo em conta que o recurso utilizado pelas mesmas é pouco controlável e algumas vezes imprevisível, a sua utilização sofre de algumas restrições devido ao seu output de energia extremamente irregular. A produção eólica tem um output extremamente variante e a sua presença em grande escala num sistema nacional de ene...

  6. As crianças como mercado influenciador : a influência das crianças na tomada de decisão dos pais

    OpenAIRE

    Sá, Mariana Pereira Campos e

    2015-01-01

    O segmento infantil é um mercado cada vez mais forte e importante para as marcas. O potencial deste mercado pode oferecer uma grande oportunidade a ser explorada pelos marketeers, visto que envolve grandes valores monetários devido à influência que as crianças têm sobre os pais. A crescente importância do marketing infantil foi um dos principais motivos para a concretização desta investigação. O principal objetivo deste trabalho é avaliar a influência das crianças na tomada de decisão de c...

  7. Efeitos da aplicação de agrotóxicos utilizados na produção integrada de maçã sobre pupas de Chrysoperla externa Effects of pesticides application used in integrated apple production on Chrysoperla externa pupae

    OpenAIRE

    Alexandre Pinho de Moura; Geraldo Andrade Carvalho; Olinto Lasmar; Valéria Fonseca Moscardini; Denise Tourino Rezende

    2009-01-01

    Devido à grande importância de Chrysoperla externa (Neuroptera: Chrysopidae) como agente de controle biológico de artrópodes-praga na cultura da macieira no Brasil, avaliaram-se os efeitos dos agrotóxicos (g i.a. L-1) abamectina (0,02), carbaril (1,73), enxofre (4,80), fenitrotiona (0,75), metidationa (0,40) e triclorfom (1,50) em pupas desse predador, oriundas de Bento Gonçalves e Vacaria, Rio Grande do Sul, bem como sobre o desenvolvimento dos adultos obtidos e sua reprodução. A aplicação d...

  8. Determinantes da lealdade às marcas de surf

    OpenAIRE

    Torres, Tiago Miguel Faria

    2014-01-01

    Mestrado em Marketing O surf é um desporto a que está associado um mercado muito competitivo e fortemente centrado em marcas. Como em muitos outros mercados, devido ao aumento da intensidade concorrencial é cada vez mais difícil para as empresas não só conseguir clientes, como retê-los a longo prazo. A aposta na imagem da marca surge na literatura como um importante factor de diferenciação das empresas, que pode levar a criação de lealdade dos consumidores. O presente estudo analisa assim ...

  9. Transplante de células da medula óssea na insuficiência cardíaca chagásica: relato da primeira experiência humana

    Directory of Open Access Journals (Sweden)

    Fábio Vilas-Boas

    2011-04-01

    Full Text Available FUNDAMENTO: Insuficiência cardíaca (IC causada por Doença de Chagas (DC é uma cardiomiopatia inflamatória progressiva que afeta milhões de pessoas na América Latina. Estudos com modelos de camundongo de IC devido à DC indicam que o transplante de células mononucleares derivadas da medula óssea (TCDMO pode reduzir a inflamação, fibrose e melhorar a função miocárdica. OBJETIVO: O propósito desse estudo foi avaliar, pela primeira vez em seres humanos, a segurança e a eficácia de TCDMO no miocárdio de pacientes com IC devido à DC. MÉTODOS: Um total de 28 pacientes com IC devido à DC (média de idade de 52,2 ± 9,9 anos com classe funcional NYHA III e IV foram submetidos à TCDMO através de injeção coronariana. Os efeitos na fração de ejeção do ventrículo esquerdo (FEVE, capacidade funcional, qualidade de vida, arritmias e parâmetros bioquímicos, imunológicos e neuro-humorais foram avaliados. RESULTADOS: Não houve complicações diretamente relacionadas ao procedimento. A FEVE foi 20,1 ± 6,8% e 28,3 ± 7,9%, p < 0,03 a nível basal e 180 dias após o procedimento, respectivamente. No mesmo período, melhoras significantes foram observadas na classe funcional NYHA (3,1 ± 0,3 para 1,8 ± 0,5; p < 0,001, qualidade de vida (50,9 ± 11,7 para 25,1 ± 15,9; p < 0,001, e no teste de caminhada de seis minutos (355 ± 136 m para 437 ± 94 m; p < 0,01. Não houve alterações nos marcadores de ativação imune ou neurohormonais. Nenhuma complicação foi registrada. CONCLUSÃO: Nossos dados sugerem que a injeção intracoronariana de células derivadas da medula óssea é segura e potencialmente efetiva em pacientes com IC devido à DC. A extensão do benefício, entretanto, parece ser discreta e precisa ser confirmada em estudos clínicos maiores, randomizados, duplo-cegos, controlados com placebo.

  10. Metamaterials for Light and Electron Waves: New Phenomena and Applications

    OpenAIRE

    Fernandes, David Emanuel Dias

    2014-01-01

    A resposta electromagnética dos materiais directamente disponíveis na Natureza nem sempre proporciona flexibilidade suficiente para obter uma resposta electromagnética desejada. No entanto, esta limitação pode ser ultrapassada utilizando uma nova classe de materiais denominada metamateriais. Metemateriais são meios artificialmente estruturados que podem interagir de forma controlada e previamente estipulada com a radiação electromagnética. Devido às suas aplicações em áreas emergentes tais co...

  11. Estudo ecotoxicológico da exposição ao chumbo e à nanopartícula de dióxido de titânio em Hoplias malabaricus

    OpenAIRE

    Rossi, Stéfani Cibele

    2013-01-01

    Resumo: O aumento do uso de nanomateriais em diversos produtos nas diferentes áreas, tais como eletrônicos, cosméticos, alimentos e medicamentos tem atraído a atenção da comunidade científica devido as propriedades desconhecidas desses materiais, tais como a cinética no ambiente e a interação com outras substâncias presentes no mesmo. Apesar de diferentes estudos terem demostrado baixa toxicidade das nanopartículas de dióxido de titânio (TiO2),outros apontam para um possível efeito modulador ...

  12. The effect of silver nanoparticles: a chronic in vivo study for the evaluation of hepatic mitochondrial toxicity

    OpenAIRE

    Silva, Rui Gonçalo Teixeira da

    2014-01-01

    Os nanomateriais manufacturados têm sido de extrema importância devido às características físico-químicas benéficas que possuem comparados com os mesmos materiais de maiores dimensões. Contudo, as propriedades que os tornam tão atraentes são as mesmas que podem causar dano ao ser humano e ao meio ambiente. Ao longo dos últimos anos tem-se assistido a um rápido desenvolvimento da indústria de nanotecnologia, e a inevitável exposição humana tende a aumentar rapidamente, acompanhada por potencia...

  13. Preparation of composite with carbon nanoparticles

    OpenAIRE

    Nunes, Hector Gabriel Vieira

    2013-01-01

    Dissertação de mestrado integrado em Engenharia de Materiais O processamento de nanocompósitos de matriz polimérica é uma matéria que tem sido objeto de estudo devido ao potencial de aplicação destes materiais. A principal dificuldade na obtenção de compósitos com nanopartículas com excelentes propriedades está associada à tendência que os nanomateriais têm para se aglomerar, e consequente dificuldade em dispersar em polímeros fundidos. Esta dissertação visa estudar um equip...

  14. Sensores baseados em nanotubos de carbono funcionalizados por ligação não-covalente

    OpenAIRE

    Lage, Carla S. A.; Geraldo, M. Dulce

    2014-01-01

    A pesquisa na área dos nanomateriais de carbono, como os nanotubos de carbono (CNTs), tem crescido muito rapidamente devido às suas propriedades térmicas, eletrónicas e mecânicas. Muitos esforços têm sido realizados para aumentar a solubilidade destes materiais em diversos solventes e obter dispersões estáveis. Uma das estratégias para dispersar os CNTs consiste na funcionalização química, que apresenta como desvantagem a destruição da estrutura sp2 do carbono destes materiais. Ne...

  15. Preparação e caracterização de nanomateriais para serem utilizados como fotocatalizadores no tratamento de águas contaminadas por medicamentos

    OpenAIRE

    Frade, Tânia Cristina Antunes

    2010-01-01

    Tese de mestrado, Química, Universidade de Lisboa, Faculdade de Ciências, 2010 Actualmente, existe uma grande preocupação ambiental devido à detecção de medicamentos em efluentes, nomeadamente, o Ibuprofeno. O método de fotoelectrodegradação tem despertado interesse científico no tratamento de efluentes, pois tem apresentado resultados favoráveis quando aplicado à eliminação de medicamentos persistentes no meio ambiente. Assim, o principal objectivo deste trabalho foi preparar materiais (n...

  16. Estudo das propriedades eletroquímicas de nanopartículas de platina e sua aplicação no desenvolvimento de um sensor eletroquímico para determinação de Dapsona

    OpenAIRE

    Caetano, Fabio Roberto

    2011-01-01

    Resumo: ESTUDO DAS PROPRIEDADES ELETROQUÍMICAS DE NANOPARTíCULAS DE PLATINA E SUA APLICAÇÃO NO DESENVOLVIMENTO DE UM SENSOR ELETROQUÍMICO PARA DETERMINAÇÃO DE DAPSONA. O desenvolvimento de sensores eletroquímicos vem sendo fortemente impulsionado pela utilização de nanomateriais em sua constituição devido ao ganho em alguns processos quando em comparação com os materiais convencionais. Neste trabalho, foram utilizadas nanopartículas de platina passivadas por dodecanotiol, geradas pela rota bi...

  17. The role of calcium in Saccharomyces sp. response to ethanol stress

    OpenAIRE

    Duarte, Sofia de Oliveira Dias

    2011-01-01

    Tese de mestrado. Biologia (Microbiologia Aplicada). Universidade de Lisboa, Faculdade de Ciências, 2011 As leveduras das espécies Saccharomyces bayanus e S. cerevisiae são usadas em vários processos industriais, devido à sua capacidade fermentativa. Por isso, é importante que as leveduras sejam resistentes a elevadas concentrações de etanol, que é produzido pelas próprias durante a fermentação, de forma a que estes processos se tornem mais rentáveis. As leveduras da espécie S. cerevisiae ...

  18. A influência da motivação na produtividade do posto de trabalho: aplicação à indústria automóvel

    OpenAIRE

    Abreu, Vitor Daniel Fernandes de

    2011-01-01

    Na sociedade moderna em que vivemos, todo o ser humano necessita de interagir e cooperar com quem o rodeia, uma vez que não vive isolado no mundo. Devido às suas limitações individuais, quando existem objectivos em comum, são criadas organizações com a finalidade de os alcançar mais facilmente. O ser humano depende das organizações, para aprender, trabalhar, ou seja, para obter todo o tipo de produtos e serviços que são necessários no seu quotidiano. Assim, pode-se afirmar que as organiza...

  19. Aspectos Bionômicos de Spodoptera eridania (Cramer): Uma Praga em Expansão na Cultura da Soja na Região do Cerrado Brasileiro

    OpenAIRE

    Bruno Sardinha de Souza; Eduardo Neves Costa; Anderson Gonçalves da Silva; Arlindo Boiça Júnior

    2014-01-01

    A soja, Glycine max (L.) Merril, é uma das culturas de maior importância econômica para o Brasil, considerada uma commodity nacional devido à sua alta produtividade e participação nas exportações no mercado internacional. Dentre os insetos-pragas que causam danos para essa cultura, nos últimos anos agrícolas têm merecido destaque as lagartas de Spodoptera eridania (Cramer), as quais podem se alimentar tanto de folhas quanto das vagens das plantas de soja, causando prejuízos econômicos para os...

  20. Preparação de novos derivados de esteroides através de reações de cicloadição [8π + 2π] de aniões metil 1,2-diazafulvénio

    OpenAIRE

    Correia, Cátia Filipa Oliveira

    2014-01-01

    O trabalho apresentado nesta dissertação teve como objetivo principal a síntese de novos esteroides hexacíclicos com possível potencial atividade biológica. Devido à sua estrutura complexa, a sua síntese ainda ocupa uma posição central nas pesquisas em química orgânica. Esta classe de compostos compreende um vasto grupo de compostos largamente distribuídos na natureza, podendo desempenhar funções vitais na fisiologia humana. O seu núcleo tetracíclico com muitos centros quirais ...

  1. Chromone derivatives as antioxidant agents : the structural variable

    OpenAIRE

    Machado, Nelson Filipe Lopes

    2012-01-01

    Devido ao facto do stress oxidativo ter vindo a ser relacionado com diversos estados patológicos graves, desde doenças cardiovasculares e neurodegenerativas a cancro, o desenvolvimento de agentes oxidantes mais eficientes, a partir de compostos de origem natural, tem sido alvo de pesquisa intensa na última década, com o objectivo de desenvolver novas estratégias de prevenção de várias patologias que constituem presentemente algumas das principais causas de morte em todo o mundo. Os deri...

  2. Preparação de células solares híbridas à base de P3HT, Óxido de Zinco e Nanotubos de Carbono

    OpenAIRE

    Skypnychuk, Vasyl

    2010-01-01

    Recentemente tem-se vindo a registar um interesse significativo no estudo de células fotovoltaicas híbridas devido ao facto da tecnologia requerida para o ser simples e flexível, o que associado a uma eficiente capacidade de conversão da energia solar as tornará economicamente viáveis. A utilização de nanopartículas inorgânicas veio aumentar o potencial interesse neste campo já que os efeitos de confinamento quântico associados ao reduzido tamanho das partículas tem permitid...

  3. Estudo da viabilidade de utilização da água de ETAR tratada para combate a incêndios florestais em Portugal continental

    OpenAIRE

    Mendes, Liliana Paula Duarte

    2009-01-01

    Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em: Engenharia do Ambiente - Perfil de Sanitária Actualmente, devido ao crescente aumento populacional as necessidades intrínsecas de água têm vindo a aumentar. Assim sendo, como as reservas de água doce são limitadas, terão de ser encontradas alternativas por forma não por em causa a sustentabilidade deste recurso. Desta forma o uso de água reutilizada para co...

  4. Avaliação do potencial de degradação do solo antes e depois de um grande incêndio florestal numa bacia elementar de Alfândega da Fé

    OpenAIRE

    Costa, Rui Miguel Teixeira da

    2015-01-01

    Um incêndio florestal corresponde a um fogo incontrolado em florestas, matas e outros espaços com abundante vegetação (matos, áreas de incultos e áreas agrícolas). Os incêndios florestais são habituais nas áreas de clima mediterrânico, particularmente em dias quentes e secos, sobretudo quando se associa também o vento forte. Podem ser o resultado de causas naturais (trovoadas secas), mas, em regra, são devidos a negligência humana e, muitas vezes, a actos de natureza criminosa....

  5. O patrulhamento - factor de prevenção de incêndios florestais

    OpenAIRE

    Delgado, Tiago

    2011-01-01

    O presente trabalho de investigação aplicada está subordinado ao tema: O Patrulhamento – Factor de Prevenção de Incêndios Florestais. Ao longo dos últimos anos, especialmente nos anos de 2003 e 2005, os incêndios florestais assumiram uma gravidade constrangedora em todo o território nacional, devido às consequências negativas que originam. Por essa razão, tornou-se necessário encetar esforços para reduzir o número de incêndios florestais em Portugal. Existem vári...

  6. Relações entre abuso sexual na infância, transtorno de estresse pós-traumático (TEPT) e prejuízos cognitivos Relaciones entre abuso sexual en la infancia, trastorno de estrés post-traumático (TEPT) y perjuicios cognitivos Relationships between sexual abuse in childhood, post-traumatic stress disorder (PTSD) and cognitive impairments

    OpenAIRE

    Jeane Lessinger Borges; Débora Dalbosco Dell'Aglio

    2008-01-01

    Este estudo teórico aponta as relações entre abuso sexual infantil, transtorno de estresse pós-traumático (TEPT) e prejuízos cognitivos. A perspectiva cognitiva dos efeitos do abuso sexual e do TEPT foi adotada nesta revisão. O abuso sexual contra crianças pode ser considerado um fator de risco para o desenvolvimento infantil, devido às severas seqüelas cognitivas, emocionais e comportamentais relacionadas à sua ocorrência, podendo seu impacto envolver efeitos a curto e longo prazos e estende...

  7. = Stress do retículo endoplasmático durante a morte celular induzida pelo peptídeo β-amilóide : o papel da mitocôndria e dos recetores glutamatérgicos N.metil-D-aspartato

    OpenAIRE

    Costa, Rui Miguel Oliveira da

    2011-01-01

    A doença de Alzheimer é a patologia neurodegenerativa mais prevalente em idosos, afetando quase 35 milhões de pessoas em todo o Mundo. Trata-se de uma doença crónica e progressiva caracterizada por perda de memória e declínio cognitivo devido à perda sináptica e neuronal no hipocampo e córtex cerebral. Nos últimos anos fizeram-se progressos consideráveis com o intuito de compreender melhor a patogénese da doença de Alzheimer, contudo este conhecimento não foi ainda traduzido...

  8. Balanced scorecard evolution corporate responsibility perspective

    OpenAIRE

    Pilão, Pedro Miguel Ferreira

    2011-01-01

    Master of Science in Business Administration / Classificação JEL M10 - General ; M14 - Corporate Culture; Social Responsibility O conceito de Balanced Scorecard tem focado a atenção e o entusiasmo de muitos investigadores e responsáveis organizativos, reunindo uma crescente popularidade e reconhecimento entre os sistemas de gestão estratégica e de avaliação de desempenho organizacional, demarcando-se dos restantes modelos devido à integração de indicadores não financeiros bem como ao se...

  9. Obtenção de granilhas por gelificação de suspensões cerâmicas

    OpenAIRE

    F. C. Figueira; D. Hotza; A. M. Bernardin

    2014-01-01

    Granilhas são matérias-primas amplamente utilizadas na indústria cerâmica de revestimento, pois conferem às placas de pavimento propriedades como resistência à abrasão, risco e deslizamento, além de efeitos de textura. O alginato de sódio é um polissacarídeo encontrado tanto na matriz intercelular de algas marrons como em algumas espécies de bactérias. Devido a suas propriedades estabilizantes, gelificantes e espessantes, o alginato é amplamente usado industrialmente. Neste trabalho, o algina...

  10. Substâncias GRAS no controle do crescimento de Colletotrichum gloeosporioides e Fusarium guttiforme in vitro

    OpenAIRE

    Eskálath Morganna Silva Ferreira; Camilla Martins Malta; Cristiane Martins Coelho; Raphael Sanzio Pimenta

    2015-01-01

    Colletotrichum gloeosporioides e Fusarium guttiforme são fungos fitopatogênicos causadores de diversas doenças pós-colheita em frutos. As substâncias “GRAS”- (Generally d Regarded As Safe), são uma alternativa no controle de micro-organismos na fase pós-colheita, devido seus efeitos fungistáticos e fungicidas comprovados. O presente estudo observou os efeitos de cinco substâncias “GRAS” no controle de crescimento dos fungos fitopatogênicos C. gloeosporioides e F. guttiforme in vitro. Meios de...

  11. Response of salt marsh plants to the heavy metals in the Tagus estuary

    OpenAIRE

    Silva, Vânia Filipa Nunes da, 1985-

    2010-01-01

    Tese de mestrado. Biologia (Biologia Celular e Biotecnologia). Universidade de Lisboa, Faculdade de Ciências, 2010 Há muito que a orla costeira, com os seus estuários e sapais, atrai a população para as suas margens, devido principalmente à sua localização privilegiada e de grande riqueza biológica. Consequentemente, a acção antropogénica desempenhada sobre estas regiões, que actuam frequentemente como reservatório de poluentes e nutrientes, tem vindo a exercer um impacto negativo sobre to...

  12. Tumor glômico endobrônquico com atelectasia de lobo superior direito Bronchial glomus tumor with right upper lobe atelectasis

    OpenAIRE

    Artur Eugênio de Azevedo-Pereira; Moacyr Pezati Rigueiro; Fernando Conrado Abrão

    2010-01-01

    Tumores glômicos são raras neoplasias benignas de tecidos moles. Relatamos o caso de um paciente de 32 anos de idade que apresentava atelectasia em lobo superior direito devido a um tumor endobrônquico. O paciente foi submetido a lobectomia superior direita e broncoplastia em cunha. O diagnóstico patológico foi de tumor glômico endobrônquico. Até onde sabemos, essa apresentação com atelectasia em lobo superior direito nunca foi relatada. O tumor glômico deve ser considerado no diagnóstico dif...

  13. SUSTENTABILIDADE AMBIENTAL E SEUS IMPACTOS APLICADOS NA REDE HOTELEIRA DE SÃO LUÍS - MARANHÃO

    OpenAIRE

    Carvalho, Frankliny Lima Carneiro; Henkes, Jairo Afonso

    2014-01-01

    A preocupação com o desenvolvimento sustentável é um dos maiores desafios que o mundo enfrenta neste novo milênio fazer com que as forças de mercado protejam e melhorem a qualidade ambiental. Os hotéis do mundo inteiro estão trazendo o gerenciamento ambiental para o dia-a-dia de seus negócios, devido a uma clientela cada vez mais consciente das agressões e acidentes ambientais, vem requerendo,que sejam considerados os impactos ambientais causados pelas atividades econômicas e que seja efetiva...

  14. Lazer, turismo e desenvolvimento local em território de montanha : o exemplo do concelho de Manteigas

    OpenAIRE

    Saraiva, David Matos

    2012-01-01

    As regiões de montanha, consideradas zonas rurais com grande valor ambiental e paisagístico devido ao seu declive demográfico, apresentam-se com elevados níveis de despovoamento, o que carece de políticas e estratégias de desenvolvimento capazes de atenuar o isolamento. Dadas as suas condições naturais e culturais, as regiões de montanha são cada vez mais procuradas como fuga aos ambientes citadinos dos grandes espaços urbanos. Esta crescente procura pelo bem-estar evidencia a necessidade ...

  15. Célula de permeação a temperatura controlada

    OpenAIRE

    Conde, Joaquim Marcelino da Silva

    2010-01-01

    Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para oBanho Termostatizadoenção do grau de Mestre em Engenharia Física Devido à importância da manutenção da temperatura num ensaio de permeabilidade, foi criado este projecto para dar apoio aos ensaios já realizados no METROVAC. Foi desenhada e construída uma Célula de Permeação e um Banho Termostatizado, sendo controlado este sistema por um controlador PID CAL 3300. Para o desenho da Célula de...

  16. Transplante de medula óssea em anemia de Fanconi escalonando doses decrescentes de ciclofosfamida

    OpenAIRE

    Zanis Neto, Jose

    1999-01-01

    Resumo: A Anemia de Fanconi é uma doença genética de herança autossômica recessiva, evoluindo para pancitopenia grave, leucemia ou outros tumores sólidos. Pacientes com essa anemia, devido às suas características celulares, são hipersensíveis a agentes quimioterápicos e sofrem de uma intensa e grave toxicidade em resposta aos regimes de condicionamento, que, em geral, utilizam agentes alquilantes como a ciclofosfamida. Na unidade de transplante de medula óssea do Hospital de Clínicas da Unive...

  17. Biópsia estereotáxica para linfomas primários do sistema nervoso central

    OpenAIRE

    MURILO S. MENESES; Brian P. O'Neill; Kelly, Patrick J.

    1992-01-01

    Os linfomas primários do SNC são raros, mas sua incidência tem aumentado nos últimos anos, Estes tumores frequentemente se localizam nos gânglios da base e tálamo ou se apresentam de forma multifocal. O tratamento atual para eles é a radioterapia, associada ou não a quimioterapia. Devido à sua extremamente baixa morbidade, a biópsia estereo-táxica é o método ideal para determinar o diagnóstico histológico em pacientes com suspeita de linfomas do SNC. Os autores apresentam estudo de 49 casos d...

  18. Traqueostomia percutânea: técnica ideal?

    OpenAIRE

    Rodrigo Afonso da Silva Sardenberg; Antonio Bomfim M. Avertano; Riad N. Younes

    2011-01-01

    A traqueostomia percutânea tem substituído a traqueostomia convencional em muitas Unidades de Terapia Intensiva, devido à facilidade e segurança do método realizado à beira do leito, dispensando o transporte do paciente da Unidade de Terapia Intensiva para o Centro Cirúrgico. Alguns autores sugerem que a dissecção limitada resulta em menor dano tecidual, diminui o risco de sangramento e infecção de ferida operatória. Esta revisão visa analisar e sintetizar estudos prospectivos e randomizados,...

  19. Produtividade da videira 'Niagara Rosada' em cultivo intercalar com adubos verdes

    OpenAIRE

    Elaine Bahia Wutke; Maurilo Monteiro Terra; Erasmo José Paioli Pires; Ivan José Antunes Ribeiro; Afonso Peche Filho

    2011-01-01

    Devido ao aumento no custo de produção com a utilização de cobertura morta com capim nas ruas da videira 'Niagara Rosada' e à dificuldade para sua aquisição, objetivou-se a possibilidade de substituí-la por plantas de cobertura de solo nas entrelinhas da videira. Em experimentos realizados em cinco safras, em Indaiatuba, numa entrelinha, e em três em Jundiaí, em duas entrelinhas-SP, no período de 1999/2000 a 2003/2004, conduziram-se seis tratamentos nas entrelinhas, em blocos ao acaso e com q...

  20. Qualidade de frutos de videira 'Niagara Rosada' em cultivo intercalar com gramínea e leguminosas Influence of green cover on fruit quality of table grape variety Niagara Rosada

    OpenAIRE

    Elaine Bahia Wutke; Cássia Regina Limonta Carvalho; Fabio Costa; Maurilo Monteiro Terra; Erasmo José Paioli Pires; Ismael Luiz Secco; Ivan José Antunes Ribeiro

    2004-01-01

    Devido ao aumento do custo de produção com a utilização de cobertura morta com capim nas ruas da videira, no presente estudo, objetivou-se a possibilidade de substituição dessa cobertura morta por adubação verde intercalar, sem interferência nas características qualitativas dos frutos da videira 'Niagara Rosada', em experimentos realizados em Indaiatuba e Jundiaí-SP, de 1999 a 2002. Nas ruas da videira, instalaram-se seis tratamentos, em blocos ao acaso e 4 repetições, constando de testemunha...