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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

    Energy Technology Data Exchange (ETDEWEB)

    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. Protecções pulpares directas

    OpenAIRE

    Rosas, Diogo Pinheiro Ferreira

    2008-01-01

    Monografia apresentada à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em Medicina Dentária A protecção pulpar directa é uma matéria que tem vindo a ser estudada durante muitos anos. A aplicação de vários materiais em exposições pulpares tem como principal função tentar preservar a vitalidade pulpar do órgão dentário. Após emprego empírico de diferentes substâncias, chegou-se finalmente ao hidróxido de cálcio, cuja indicação perdura até aos dias...

  3. In vivo toxicity study of Lantana camara

    OpenAIRE

    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...

  4. In vivo toxicity study of Lantana camara.

    Science.gov (United States)

    Pour, Badakhshan Mahdi; Sasidharan, Sreenivasan

    2011-06-01

    To investigate the toxicity of methanol extract of various parts (Root, Stem, Leaf, Flower and Fruit) of Lantana camara (L. Camara) in Artemia salina. The methanol extracts of L. camara were tested for in vivo brine shrimp lethality assay. 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. Methanolic extract of L. camara is relatively safe on short-term exposure.

  5. Nematicidal triterpenoids from Lantana camara.

    Science.gov (United States)

    Begum, Sabira; Ayub, Anjum; Shaheen Siddiqui, Bina; Fayyaz, Shahina; Kazi, Firoza

    2015-09-01

    A new triterpene, lancamarolide (1), and seven known triterpenes, oleanonic acid (2), lantadene A (3), 11α-hydroxy-3-oxours-12-en-28-oic acid (4), betulinic acid (5), lantadene B (6), and lantaninilic acid (7) were isolated from the aerial parts of Lantana camara in the course of bioassay-guided isolation, and their nematicidal activities against Meloidogyne incognita, the root knot nematode, were carried out. Oleanonic acid was found to be the most active compound and exhibited 80% mortality after 72 h at 0.0625% concentration, which is comparable with that of the standard furadan. Copyright © 2015 Verlag Helvetica Chimica Acta AG, Zürich.

  6. Urgencias estomatológicas por lesiones pulpares Dental emergencies caused by pulpar lesions

    Directory of Open Access Journals (Sweden)

    Yunaisy Montoro Ferrer

    2012-12-01

    Full Text Available Varias son las enfermedades que llevan a los pacientes a acudir a la consulta de urgencias estomatológicas, la gran mayoría corresponde a afecciones pulpares debido a la sintomatología dolorosa que las caracteriza. El objetivo de este trabajo describir el comportamiento de las enfermedades pulpares en pacientes del área de salud de la clínica estomatológica “27 de Noviembre” en el período comprendido entre los meses de octubre 2008 a diciembre 2009, se realizó un estudio analítico de corte transversal en el cual se incluyeron 173 pacientes adultos entre 19 y 59 años que acudieron al servicio con diagnóstico de cualquiera de las enfermedades pulpares agudas. Del total de casos diagnosticados el 81 para un 46,8 % correspondió a la pulpitis aguda irreversible, el 34,7 % a pulpitis transitoria y el 18,5 % a hiperemia pulpar. El grupo dentario más afectado fue el de los molares y el tipo de lesión pulpar resultó independiente del grupo dentario al igual que resultó independiente del factor causal, entre los cuales aparece con un alto predominio la caries dental con un 65,9 %; el dolor tanto en tipo como en intensidad dependen del tipo de lesión que tenga la pulpa según los resultados del estadígrafo X² de Pearson obtenidos en el estudio, donde el dolor espontáneo se presentó solamente para los pacientes con pulpitis aguda irreversible, en los que ningún caso se reportó el dolor con categoría leve.There is a range of diseases that make the patients go to the dental emergency service; most of them result from pulp disorders due to the painful symptoms that characterize them. The objective of this paper was to describe the behavior of pulp diseases in patients from the health area of "27 de Noviembre2dental clinic in the period of October 2008 through December 2009. To this end, a cross-sectional analytical study was conducted in 173 adult patients aged 19 to 59 years and diagnosed as having any of the acute pulp diseases

  7. Urgencias estomatológicas por lesiones pulpares

    OpenAIRE

    Yunaisy Montoro Ferrer; María Elena Fernández Collazo; Dadonim Vila Morales; Agustín Rodríguez Soto; Dania Lucrecia Mesa González

    2012-01-01

    Varias son las enfermedades que llevan a los pacientes a acudir a la consulta de urgencias estomatológicas, la gran mayoría corresponde a afecciones pulpares debido a la sintomatología dolorosa que las caracteriza. El objetivo de este trabajo describir el comportamiento de las enfermedades pulpares en pacientes del área de salud de la clínica estomatológica “27 de Noviembre” en el período comprendido entre los meses de octubre 2008 a diciembre 2009, se realizó un estudio analítico de corte tr...

  8. Leishmanicidal Triterpenes from Lantana camara.

    Science.gov (United States)

    Begum, Sabira; Ayub, Anjum; Qamar Zehra, Syeda; Shaheen Siddiqui, Bina; Iqbal Choudhary, M; Samreen

    2014-05-01

    Two new natural triterpenes, lantaninilic acid and lantoic acid, along with the known triterpenes lantadene A, and oleanolic, ursolic, betulinic, lantanolic, and camaric acid, were obtained from the aerial parts of Lantana camara through bioassay-guided isolation, monitoring the in vitro antileishmanial activity against promastigotes of Leishmania major. Oleanolic acid (3), ursolic acid (4), lantadene A (5), and lantanilic acid (7) showed significant leishmanicidal activities with IC50 values of 53.0, 12.4, 20.4, and 21.3 μM, respectively. The IC50 value of ursolic acid (4; 12.4 μM) was found to be comparable with that of the standard drugs, pentamidine (IC50 15.0 μM) and amphotericin B (IC50 0.31 μM). The in vitro activities of L. camara and its constituents against promastigotes of Leishmania major are reported here for the first time. Copyright © 2014 Verlag Helvetica Chimica Acta AG, Zürich.

  9. Urgencias estomatológicas por lesiones pulpares

    Directory of Open Access Journals (Sweden)

    Yunaisy Montoro Ferrer

    2012-12-01

    Full Text Available Varias son las enfermedades que llevan a los pacientes a acudir a la consulta de urgencias estomatológicas, la gran mayoría corresponde a afecciones pulpares debido a la sintomatología dolorosa que las caracteriza. El objetivo de este trabajo describir el comportamiento de las enfermedades pulpares en pacientes del área de salud de la clínica estomatológica “27 de Noviembre” en el período comprendido entre los meses de octubre 2008 a diciembre 2009, se realizó un estudio analítico de corte transversal en el cual se incluyeron 173 pacientes adultos entre 19 y 59 años que acudieron al servicio con diagnóstico de cualquiera de las enfermedades pulpares agudas. Del total de casos diagnosticados el 81 para un 46,8 % correspondió a la pulpitis aguda irreversible, el 34,7 % a pulpitis transitoria y el 18,5 % a hiperemia pulpar. El grupo dentario más afectado fue el de los molares y el tipo de lesión pulpar resultó independiente del grupo dentario al igual que resultó independiente del factor causal, entre los cuales aparece con un alto predominio la caries dental con un 65,9 %; el dolor tanto en tipo como en intensidad dependen del tipo de lesión que tenga la pulpa según los resultados del estadígrafo X² de Pearson obtenidos en el estudio, donde el dolor espontáneo se presentó solamente para los pacientes con pulpitis aguda irreversible, en los que ningún caso se reportó el dolor con categoría leve.

  10. Lantana camara L. (sensu lato): an enigmatic complex

    OpenAIRE

    Neha Goyal; Gyan Prakash Sharma

    2015-01-01

    Lantana camara L., considered among the world's worst invaders is in identity crisis and contentiously referred as Lantana camara L. (sensu lato). Taxonomic ambiguity in L. camara L. (sensu lato), a species complex is one of the grim caveats behind incompetence of its management efforts. Recognizing the extent of variability within the complex, we aim to highlight the need to circumscribe its composition to bring effective management and control efforts into practice. There is a need for clea...

  11. PHYTOCHEMICAL SCREENING OF ACORUS CALAMUS AND LANTANA CAMARA

    OpenAIRE

    Saxena Mamta; Saxena Jyoti

    2012-01-01

    Acorus calamus and Lantana camara is an important medicinal plants with several ethnomedicinal properties. In this study plants Acorus calamus and Lantana camara were screened for the presence of major phytochemical groups. The phytochemicals are the wide variety of compounds produced by plants manipulated wisely in the pharmacognostic drug development and treatment of the major ailments. Phytochemical screening of the plants extracts of Acorus calamus and Lantana camara showed the presence o...

  12. Interacción infecto-inmunológica pulpar.

    OpenAIRE

    Pisterna, Gabriela; Spoleti, Pablo

    2004-01-01

    Recibido: Abril 2004 Aceptado: Agosto 2004 Cuando los microorganismos dañan al huésped y producen signos y síntomas provocan lo que se conoce como infección; si se afecta el tejido pulpar podríamos hablar de "infección endodóntica". Cualquier microorganismo de la cavidad bucal puede estar involucrado en esta infección, a través de la brecha abierta por la placa bacteriana. Se conocen más de 300 especies capaces de invadir el tejido dentario.(BAUMGARTNER, 1996) Palabras ...

  13. Estudio de biocompatibilidad celular de distintos materiales utilizados en los recubrimientos pulpar

    OpenAIRE

    Saura Miñano, Diego

    2014-01-01

    La protección pulpar indirecta, o recubrimiento pulpar indirecto, es el tratamiento de caries profundas, mediante el cual evitamos a propósito la entrada en la cámara pulpar, para colocar una base cavitaria y favorecer los mecanismos biológicos de curación. Está indicado en casos de caries profundas asintomáticas o con pulpitis reversible, sin signos ni síntomas de inflamación irreversible, dolor o infección. Para este procedimiento utilizamos diversos materiales, como son los ionómer...

  14. Estudio de biocompatibilidad celular de distintos materiales utilizados en los recubrimientos pulpares

    OpenAIRE

    Saura Miñano, Diego

    2014-01-01

    La protección pulpar indirecta, o recubrimiento pulpar indirecto, es el tratamiento de caries profundas, mediante el cual evitamos a propósito la entrada en la cámara pulpar, para colocar una base cavitaria y favorecer los mecanismos biológicos de curación. Está indicado en casos de caries profundas asintomáticas o con pulpitis reversible, sin signos ni síntomas de inflamación irreversible, dolor o infección. Para este procedimiento utilizamos diversos materiales, como son los ionómeros de vi...

  15. Biodentine: Un nuevo material en terapia pulpar / Biodentine: A New Material for Pulp Therapy

    National Research Council Canada - National Science Library

    Sandra Hincapié Narváez; Andreína Lis Valerio Rodriguez

    2015-01-01

    .... Entre ellos se encuentra el Biodentine®, que es un nuevo cemento de silicato de calcio con propiedades de biocompatibilidad y bioactividad que, en contacto directo con el tejido pulpar, induce el desarrollo de dentina reparativa y logra...

  16. Biofabrication of nanogold from the flower extracts of Lantana camara.

    Science.gov (United States)

    Kumar, Brajesh; Smita, Kumari; Cumbal, Luis

    2016-06-01

    The present investigation was done to explore the potential of Lantana camara (L. camara) flower in the fabrication of gold nanoparticles (AuNPs). The shape and size of AuNPs have been successfully controlled by introducing small amounts of L. camara flower extract. It produced spherical nanogold of average size 10.6 ± 2.9 nm without any aggregation and showed significant photocatalytic degradation activity of the methylene blue (>62%, 10 mg/L) in the presence of solar light. In addition, the experimental approach is inexpensive, rapid and eco-friendly for industrial scale production of nanoparticles.

  17. Phytochemical and termiticidal study of Lantana camara var. aculeata leaves.

    Science.gov (United States)

    Verma, Rajesh K; Verma, Suman K

    2006-09-01

    Extracts of Lantana camara var. aculeata leaves were studied for their phytochemical constituents and termiticidal effects against adult termite workers. The 5% chloroform extract was found to be significantly effective against termite workers.

  18. Lantana camara L. (sensu lato: an enigmatic complex

    Directory of Open Access Journals (Sweden)

    Neha Goyal

    2015-04-01

    Full Text Available Lantana camara L., considered among the world’s worst invaders is in identity crisis and contentiously referred as Lantana camara L. (sensu lato. Taxonomic ambiguity in L. camara L. (sensu lato, a species complex is one of the grim caveats behind incompetence of its management efforts. Recognizing the extent of variability within the complex, we aim to highlight the need to circumscribe its composition to bring effective management and control efforts into practice. There is a need for clear terminology to examine weedy, naturalized and/or invasive complex constituents that have been placed under the contentious umbrella of ‘L. camara L. (sensu lato’. The time is ripe for invasion ecologists, cytogeneticists and conservationists to collaboratively focus on disentangling the complex and integrate their knowledge and expertise into management and control programs.

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

    Directory of Open Access Journals (Sweden)

    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

  20. Interaction between Uroplata girardi (Coleoptera: Chrysomelidae) and Ophiomyia camarae (Diptera: Agromyzidae) on a shared host Lantana camara (Verbenaceae).

    Science.gov (United States)

    April, Vuyokazi; Robertson, Mark P; Simelane, David O

    2011-10-01

    Multiple releases of insect agents intended to target a single plant pest species could result in competitive interactions that in turn might affect the community structure of the phytophagous insects. Two leaf-feeding biological control agents, Uroplata girardi Pic (Coleoptera: Chrysomelidae) and Ophiomyia camarae Spencer (Dipetera: Agromyzidae), were released against the weed Lantana camara L. (Verbenaceae) in South Africa in the 1970s and 2001, respectively. Since the population explosion of O. camarae in 2005, a decline of U. girardi populations had been observed in KwaZulu-Natal (KZN) humid coast, leading to speculation that negative interaction may be operating between the agents. The study therefore was conducted to determine the competitive effect of O. camarae on U. girardi. The study showed that 76% of O. camarae larval mines were formed on uninfested (clean) compared with only 24% formed on U. girardi-infested leaves, suggesting that the fly chose to lay more eggs on clean leaves. Almost the same number of U. girardi larval mines was formed on both O. camarae-infested and clean leaves, indicating that U. girardi females in this case oviposited indiscriminately on the two types of leaves. The survival of U. girardi was 53.8% when reared on clean leaves compared with only 14.6% survival on O. camarae-infested leaves. At the end of the sampling period, densities of U. girardi was over two times higher in single-species than in combined-species treatment. Releasing both agents together did not significantly affect O. camarae densities during the sampling period. In the field, O. camarae densities increased rapidly from spring to autumn, whereas those of U. girardi remained consistently low during the same period. The bias toward oviposition on clean leaves in O. camarae enables its larvae to avoid unfavorable encounters with U. girardi larvae, thus enhancing its development and survival. The apparent inability of U. girardi to distinguish between suitable

  1. Pharmacognostic study of Lantana camara Linn. root

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    Dinesh Kumar

    2012-05-01

    Full Text Available Objective: The study was carried out to perform the pharmacognostic evaluation of Lantana camara Linn. root. Method: The pharmacognostic evaluation was done in terms of organoleptic, macro-microscopy, fluorescence analysis and physicochemical parameters. Results: The characteristic macroscopic features showed that the root consists of 25-40 cm long, 0.2-4.0 cm thick pieces which are usually branched, shallow, tough, creamish-brown externally, outer surface rough due to longitudinal wrinkles, with hard fracture, characteristic odour and pungent taste. The main microscopic characters of the root shows exfoliating cork, consisting of about 10-15 rows of tangentially elongated, thick-walled cells followed by cortex consisting of polygonal parenchymatous cells, a few containing rhomboidal shaped calcium oxalate crystals. Endodermis consists of 3-4 layers of non-lignified, thick-walled rounded parenchymatous cells followed by a single layer of non-lignified pericycle. Phloem, a wide zone of xylem consisting of lignified pitted vessels and bi-to triseriate medullary rays are also present. Proximate physicochemical analysis of the root power showed loss on drying, total ash, water soluble ash, sulphated ash values as 0.52, 4.26, 3.8 and 5.8 % w/w respectively. Successive extraction of the root powder with petroleum ether, chloroform, alcohol, water yielded 0.19, 0.35, 2.19 and 2.0 % w/w respectively. Fluorescence study imparted characteristic colors to the root powder when observed under visible, short and long wavelength light. Conclusions: Various pharmacognostic parameters evaluated in this study helps in identification and standardization of Lantana camara L. root in crude form.

  2. Biodentine: Un nuevo material en terapia pulpar / Biodentine: A New Material for Pulp Therapy

    OpenAIRE

    Hincapié Narváez, Sandra; Universidad El Bosque. Bogotá, Colombia; Valerio Rodriguez, Andreína Lis; Universidad El Bosque. Bogotá, Colombia

    2015-01-01

    RESUMEN. Antecedentes: Nuevos métodos y medicamentos en terapia pulpar en dentición temporal se han dado a conocer a principios del siglo XXI. Entre ellos se encuentra el Biodentine®, que es un nuevo cemento de silicato de calcio con propiedades de biocompatibilidad y bioactividad que, en contacto directo con el tejido pulpar, induce el desarrollo de dentina reparativa y logra el mantenimiento de la vitalidad y función del tejido. Objetivo: Presentar el reporte de un caso de una pulpotomía co...

  3. Lantana camara for fuel ethanol production using thermotolerant yeast.

    Science.gov (United States)

    Pasha, C; Nagavalli, M; Rao, L Venkateswar

    2007-06-01

    Evaluation of Lantana camara's use as feedstock for fuel ethanol production. Lantana camara plant material was hydrolysed with 1% sulfuric acid for 18 h at room temperature, followed by heat treatment of 121 degrees C for 20 min. Hemicellulosic hydrolyzate was separated and used for detoxification by ethyl acetate and overliming. Cellulosic fraction was hydrolysed with Aspergillus niger crude cellulase enzyme for 18 h at 55 degrees C. Using 15% (dw/v) substrate 73 g l(-1) total reducing sugars were obtained to give 78.7% hydrolysis of carbohydrate content. Acid and enzyme hydrolyzates were mixed equally and used for fermentation with thermotolerant Saccharomyces cerevisiae (VS(3)). Yeast fermented L. camara hydrolyzate well with a fermentation efficiency of 83.7% to give an ethanol yield of 0.431 +/- 0.018 g ethanol pre g sugar and productivity of 0.5 +/- 0.021 g l(-1) h(-1). Even though inhibitors were present in L. camara hydrolyzate, maximum sugars were utilized by thermotolerant yeast. Use of L. camara for fuel ethanol production with improved strains and detoxification can be recommended.

  4. Importancia de la semiología del dolor en el diagnóstico de un proceso inflamatorio pulpar

    National Research Council Canada - National Science Library

    Andrés 0 Pérez Ruiz; Julia María Martínez Lima; Jannette Carmona Betancourt; María Elena Urgelles Jiménez

    2011-01-01

    .... Con el objetivo de profundizar en el conocimiento de las fases por las que atraviesa un proceso inflamatorio pulpar, que permiten predecir sus manifestaciones dolorosas, se realizó una revisión...

  5. Effect of Insecticidal Plant Materials, Lantana camara L. and

    African Journals Online (AJOL)

    Effect of Insecticidal Plant Materials, Lantana camara L. and Tephrosia vogelii Hook, on the Quality Parameters of Stored Maize Grains. ... product treatments suitable for post-harvest grain protection and as sustainable alternatives to synthetic insecticides in the control of the maize weevil, Sitophilus zeamais Motschulsky.

  6. Distribution of the invasive alien weed, Lantana camara , and its ...

    African Journals Online (AJOL)

    Lantana camara (lantana) is a major invasive shrub globally, impacting upon biodiversity, economies, ecosystem services, and driving socio-ecological change. The aim of this study was to determine the current and potential distribution of lantana in eastern Africa and its livelihood impacts in one region in Uganda.

  7. Effect of Root Extracts of Lantana camara (Verbenaceae) on Larvae ...

    African Journals Online (AJOL)

    Larvicidal activity of three solvent root (bark and wood) extracts of Lantana camara Linn. was investigated against first and fourth instars of Aedes aegypti larvae after 24 and 48 h post-treatment exposure to serial concentrations (0.1, 0.05, 0.01, 0.005, 0.001 %) of aqueous, ethanolic and acetone crude extracts. All extracts ...

  8. Impacts of climate change on invasive Lantana camara L ...

    African Journals Online (AJOL)

    Climate change and invasive species are now seen as two major contributors to global biodiversity change. The combined effects of these two factors have serious implications for biodiversity and agriculture. Lantana camara L. (sensu lato) (lantana) is a woody shrub that is highly invasive in many countries of the world ...

  9. Lantana camara (verbenaceae) : a potential threat to the ...

    African Journals Online (AJOL)

    Invasive plant species are today among the biggest threats to integrity of many ecosystems including that of the protected areas. Climate change may exacerbate the negative effects of invasive plant species. Here, we used the Maximum Entropy model to project habitat suitability for Lantana camara L., an invasive plant ...

  10. Allelopathic Effects of Lantana ( Lantana camara L.) Leaf Extracts on ...

    African Journals Online (AJOL)

    Allelopathic potential of aqueous extracts of lantana (Lantana camara L.) leaf on germination and growth of three agricultural crops: Maize, Finger millet and Tef, commonly cultivated in Ethiopia were studied under laboratory condition. The aqueous extracts were assayed at 5, 10, 25, 50 and 75% and their allelopathic ...

  11. Antimycobacterial activity of flavonoids from Lantana camara Linn.

    Science.gov (United States)

    Begum, S; Wahab, A; Siddiqui, B S

    2008-04-15

    Linaroside (1) and lantanoside (2), two flavonoids isolated from Lantana camara and their common acetyl derivative (3) were examined for antimycobacterial activity against Mycobacterium tuberculosis, strain H(37)Rv. These compounds exhibited 30, 37 and 98% inhibition, respectively at 6.25 microg mL(-1) concentration. Among these flavonoids acetylated compound was found to be the most active.

  12. Lantana camara Induces Apoptosis by Bcl-2 Family and Caspases Activation.

    Science.gov (United States)

    Han, Eun Byeol; Chang, Bo Yoon; Jung, Young Suk; Kim, Sung Yeon

    2015-04-01

    Breast cancer is one of the most common cancers worldwide, and the second most fatal cancer in women after lung cancer. Because there are instances of cancer resistance to existing therapies, studies focused on the identification of novel therapeutic drugs are very important. In this study, we identified a natural anticancer agent from Lantana camara, a flowering plant species of the genus Verbena. The extract obtained from the L. camara exhibited cell death properties in the human breast cancer cell line, MCF-7. We found that the apoptosis induced by treatment with the L. camara extract was regulated by the Bcl-2 family. Bid and Bax was increased and Bcl-2 was decreased by L. camara extract. L. camara extract modulated cleavage of caspase-8, and caspase-9, as well as poly (ADP-ribose) polymerase (PARP). Our results support the potential use of the L. camara extract as an anti-breast cancer drug.

  13. ANTIMICROBIAL ACTIVITY OF BIOSYNTHESIZED SILVER NANOPARTICLES PREPARED FROM THE LEAF EXTRACT OF LANTANA CAMARA

    OpenAIRE

    Kumarasamyraja D; Jeganathan N. S.

    2013-01-01

    Lantana camara commonly known as weed or red sage is found throughout India. It was reported to be used in traditional medicine system for infectious diseases. The present study designed to evaluate antimicrobial activity of aqueous extract of Lantana camara and bio synthesized silver Nanoparticles from aqueous extract of Lantana camara. When the extract of the plant was treated with silver nitrate (1mM) solution, a yellowish brown color developed indicating the formation of silver Nanopartic...

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

    Directory of Open Access Journals (Sweden)

    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.

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

    National Research Council Canada - National Science Library

    Elva Zayas Sánchez; Niria Yusimi Reyes Desdín; Lidiana Fajardo Álvarez

    2014-01-01

    ... 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...

  16. Nematicidal and allelopathic responses of Lantana camara root extract

    Directory of Open Access Journals (Sweden)

    S.S. Shaukat

    2003-04-01

    Full Text Available The impact of root leachates of Lantana camara L., a tropical weed, against Meloidogyne javanica, the root-knot nematode, was tested under laboratory and pot conditions. Concentrated and diluted root leachate caused substantial mortality of M. javanica juveniles. Significant suppression of the nematode was achieved when soil was treated with a full-strength concentration of the leachate. Whilst this high concentration retarded plant height and shoot fresh weight, more diluted concentrations actually enhanced plant growth. To establish whether this inhibition of plant growth from the leachate was the result of depleted nitrogen levels in the soil due to the leachate, soil treated with such leachates was given urea as an additional nitrogen source. Urea not only enhanced nematode suppression activity of the root leachates but also increased seedling emergence and growth of mungbean. Application of the L. camara root leachates in combination with Pseudomonas aeruginosa, a plant growth-promoting rhizobacterium, significantly reduced nematode population densities in roots and subsequent root-knot infection, and enhanced plant growth. While a high concentration of root leachate slightly reduced P. aeruginosa colonization in the rhizosphere and inner root tissues, the nematicidal efficacy of the bacterium was unaffected. The root leachate of L. camara was found to contain phenolic compounds, including p-hydroxybenzoic acid, vanillic acid, caffeic acid, ferulic acid and a quercetin glycoside, 7-glucoside. It also contained weak enzymic hydrogen cyanide.

  17. Antiulcerogenic activity of Lantana camara leaves on gastric and duodenal ulcers in experimental rats.

    Science.gov (United States)

    Sathish, R; Vyawahare, Bhushan; Natarajan, K

    2011-03-08

    Lantana camara L. (Verbenaceae), a widely growing shrub has been used in the traditional medicine for treating many ailments. The objective of the present study was to evaluate the effects of methanolic extract of Lantana camara leaves on gastric and duodenal ulcers. The antiulcerogenic effect of methanolic extract of Lantana camara was evaluated in aspirin induced gastric ulcerogenesis in pyloric ligated rats, ethanol induced gastric ulcer, and cysteamine induced duodenal ulcer models. The extract was administered orally at two different doses of 250 mg/kg and 500 mg/kg. The lipid peroxidation, reduced glutathione levels of ethanol induced gastric ulcer model and inhibition zone in diameter against Helicobacter pylori also determined. The L. camara extract significantly (Pcamara showed significant (PLantana camara leaves shown healing of gastric ulcers and also prevents development of duodenal ulcers in rats. Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.

  18. Foliar anatomy of the species Lantana camara and L. radula (Verbenaceae Anatomia foliar das espécies Lantana camara e L. radula (Verbenaceae

    Directory of Open Access Journals (Sweden)

    J.L. Passos

    2009-01-01

    Full Text Available The species Lantana camara, commonly used as ornamental, has spread worldwide becoming one of the world's most important weeds. To develop new methods of control of this plant, it is essential to distinguish it from other species of the same genus, and this is usually accomplished through taxonomic studies of fertile samples. Considering the similarity between L. camara and L. radula, and the consequent difficulty in distinguishing one from the other when only sterile samples are available, this work aimed to investigate the use of the anatomical characteristics of the leaves of both species as tools for supporting correct classification. The leaves of L. camara and L. radula were anatomically examined by light microscopy and scanning electron microscopy. The major differences were observed in the petiole, which presented secretory idioblasts in L. camara. Secretory idioblasts were observed in the leaf blades of L. camara and Crystalliferou idioblasts were found in L. radula. Glandular and nonglandular trichomes as well as the abaxial surface are different in each species. Such results can support the strategies aiming at the control of L. camara without interfering with L. radula.A espécie L. camara tem sido usada há séculos como ornamental e, consequentemente, espalhou-se pelo mundo, tornando-se uma das mais importantes plantas daninhas. Na busca de novos métodos de controle para essa planta, é essencial distinguir espécies do mesmo gênero, o que usualmente é feito com estudos taxonômicos de amostras férteis. Considerando a similaridade entre L. camara e L. radula, e a consequente dificuldade em distingui-las quando somente amostras estéreis estão disponíveis, entendeu-se como necessário investigar o uso de características anatômicas das folhas como fonte de informação adicional para a distinção dessas duas espécies. As folhas de L. camara e L. radula foram examinadas sob microscopia de luz e microscopia eletrônica de

  19. Estudio clínico comparativo de diferentes agentes pulpares en pulpotomías de molares primarios

    OpenAIRE

    Cuadros Fernández, Cristina

    2013-01-01

    Debido a la controversia surgida con el Formocresol sobre sus efectos adversos en su uso en pulpotomías de molares primarios, durante años se ha buscado una alternativa más segura y efectiva. Sin embargo, por el momento, no ha surgido tal agente pulpar que cumpla con dichas expectativas. Objetivo: 1er estudio: evaluar y comparar los resultados clínicos y radiográficos de diferentes agentes pulpares (formocresol, sulfato férrico, MTA e hipoclorito de sodio) en pulpotomías de molares primari...

  20. Diagnóstico del estado pulpar y sus complicaciones en dientes con historia de traumatismo.

    OpenAIRE

    Fonseca, Gabriel Mario

    2015-01-01

    Para evaluar certezas en el estado pulpar, se desarrollo un estudio descriptivo sobre 64 dientes anteriores íntegros con historia de traumatismo, distribuidos en grupo I: 9 casos de emergencia traumática (estudio prospectivo); grupo II: 32 casos con historia traumática mediata (estudio retrospectivo y prospectivo); y grupo III: 23 casos de archivo (estudio retrospectivo). Los métodos diagnósticos se basaron en indicadores visuales y exploratorios, que se complementaron con estudios macroscópi...

  1. Cytotoxicity and oral acute toxicity studies of Lantana camara leaf extract.

    Science.gov (United States)

    Pour, Badakhshan Mahdi; Latha, Lachimanan Yoga; Sasidharan, Sreenivasan

    2011-05-03

    The objective of this study was to investigate the toxicity of Lantana camara methanol extract. In order to evaluate the toxicity of Lantana camara, the acute toxicity of the methanolic extract on adult mice and cytotoxicity test on Vero cell line were investigated. A fixed large dose of 2 g/kg body weight of L. camara leaf extract was administrated by a single oral gavage according to the OECD procedure. In 2 weeks, L. camara leaf extract showed no obvious acute toxicity. While female mice lost body weight after being treated with single dose of leaf extract in acute toxicity test, male ones lost organ mass, particularly for heart and kidney. The biochemical liver function tests showed significantly elevated TBIL and ALT in the L. camara leaf extract treated female mice group compared with the control group. Cytotoxicity effect of leaf extract of L. camara was estimated through a MTT assay. Cytotoxicity tests on Vero cell line disclosed that leaf extract at concentrations up to 500 µg/mL inhibited the growth of cells 2.5 times less than did Triton 100 × 1%. More interestingly, the cytotoxicity initiated to decline at elevated concentrations of this extract. The results of both tests confirm that L. camara shows a pro toxic effect.

  2. Cytotoxicity and Oral Acute Toxicity Studies of Lantana camara Leaf Extract

    Directory of Open Access Journals (Sweden)

    Badakhshan Mahdi Pour

    2011-05-01

    Full Text Available Background: The objective of this study was to investigate the toxicity of Lantana camara methanol extract. Methods: In order to evaluate the toxicity of Lantana camara, the acute toxicity of the methanolic extract on adult mice and cytotoxicity test on Vero cell line were investigated. A fixed large dose of 2 g/kg body weight of L. camara leaf extract was administrated by a single oral gavage according to the OECD procedure. Results: In 2 weeks, L. camara leaf extract showed no obvious acute toxicity. While female mice lost body weight after being treated with single dose of leaf extract in acute toxicity test, male ones lost organ mass, particularly for heart and kidney. The biochemical liver function tests showed significantly elevated TBIL and ALT in the L. camara leaf extract treated female mice group compared with the control group. Cytotoxicity effect of leaf extract of L. camara was estimated through a MTT assay. Cytotoxicity tests on Vero cell line disclosed that leaf extract at concentrations up to 500 µg/mL inhibited the growth of cells 2.5 times less than did Triton 100× 1%. More interestingly, the cytotoxicity initiated to decline at elevated concentrations of this extract. Conclusions: The results of both tests confirm that L. camara shows a pro toxic effect.

  3. Avaliação das propriedades biológicas do Biodentine™ no capeamento pulpar direto: ensaio clínico randomizado

    OpenAIRE

    Niedermaier, Katherynn Crespi

    2014-01-01

    Estudos recentes mostram que o hidróxido de cálcio, até então tido como padrão-ouro para capeamentos pulpares diretos, forma uma barreira mineralizada de baixa qualidade e com defeitos quando comparada àquelas formadas com a aplicação de cimentos a base de silicatos. O Biodentine, cimento a base de silicato de cálcio tem apresentado resultados satisfatórios na terapêutica pulpar, induzindo dentinogênese e diferenciação de células pulpares humanas. O objetivo desta pesquisa foi avaliar a respo...

  4. Two new pentacyclic triterpenoids from Lantana camara LINN.

    Science.gov (United States)

    Begum, Sabira; Zehra, Syeda Qamar; Siddiqui, Bina Shaheen

    2008-09-01

    Two new pentacyclic triterpenoids, namely lantanoic acid (1) and camaranoic acid (2), and six known compounds such as lantic acid, camarinic acid, camangeloyl acid, camarinin, oleanonic acid, and ursonic acid were isolated from the aerial parts of Lantana camara LINN. Structures of the new constituents were elucidated by chemical transformation and spectral studies including 1D ((1)H- and (13)C-NMR) and 2D ((1)H-(1)H correlation spectroscopy (COSY), nuclear Overhauser effect spectroscopy (NOESY), (1)H-(1)H total correlation spectroscopy (TOCSY), J-resolved, (1)H-detected heteronuclear multiple quantum coherence (HMQC), and heteronuclear multiple bond connectivity (HMBC)) NMR spectroscopy.

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

    OpenAIRE

    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. Terapia pulpar em dentes decíduos: possibilidades terapêuticas baseadas em evidências

    Directory of Open Access Journals (Sweden)

    Natalino Lourenço Neto

    Full Text Available INTRODUÇÃO: A pulpotomia em dentes decíduos é uma técnica conservadora de terapia pulpar amplamente utilizada em Odontopediatria, sendo de fundamental importância para evitar a perda prematura desses dentes, quer seja por alterações provocadas pela cárie dentária ou traumatismo dentário. Apesar de ser uma técnica estudada há muitos anos, causa muitas controvérsias e discussões, principalmente em termos de biocompatibilidade dos medicamentos empregados e pelas dificuldades e falhas no diagnóstico da condição pulpar. OBJETIVO: Por meio de uma revisão sistemática da literatura, no período compreendido entre 2000 e 2011, e com enfoque em estudos clínicos randomizados, revisões sistemáticas e meta-análises, este trabalho teve como objetivo discutir, com base em evidências científicas, alternativas para o tratamento de pulpotomia em dentes decíduos humanos. CONCLUSÃO: As evidências científicas fidedignas com o uso de materiais capeadores pulpares e as técnicas de Eletrocirurgia e Laser de Baixa Potência foram escassas. Desta forma, sugere-se a realização de estudos complementares bem delineados estatisticamente para maiores esclarecimentos. As informações geradas em tais experimentos poderão contribuir para um melhor entendimento dos mecanismos da terapia pulpar, podendo gerar o desenvolvimento de protocolos com novas formas terapêuticas, que visam a melhorar a terapia pulpar em dentes decíduos.

  7. Lantana camara leaf extract mediated silver nanoparticles: Antibacterial, green catalyst.

    Science.gov (United States)

    Ajitha, B; Ashok Kumar Reddy, Y; Shameer, Syed; Rajesh, K M; Suneetha, Y; Sreedhara Reddy, P

    2015-08-01

    Silver nanoparticles (AgNPs) have been synthesized by Lantana camara leaf extract through simple green route and evaluated their antibacterial and catalytic activities. The leaf extract (LE) itself acts as both reducing and stabilizing agent at once for desired nanoparticle synthesis. The colorless reaction mixture turns to yellowish brown attesting the AgNPs formation and displayed UV-Vis absorption spectra. Structural analysis confirms the crystalline nature and formation of fcc structured metallic silver with majority (111) facets. Morphological studies elicit the formation of almost spherical shaped nanoparticles and as AgNO3 concentration is increased, there is an increment in the particle size. The FTIR analysis evidences the presence of various functional groups of biomolecules of LE is responsible for stabilization of AgNPs. Zeta potential measurement attests the higher stability of synthesized AgNPs. The synthesized AgNPs exhibited good antibacterial activity when tested against Escherichia coli, Pseudomonas spp., Bacillus spp. and Staphylococcus spp. using standard Kirby-Bauer disc diffusion assay. Furthermore, they showed good catalytic activity on the reduction of methylene blue by L. camara extract which is monitored and confirmed by the UV-Vis spectrophotometer. Copyright © 2015 Elsevier B.V. All rights reserved.

  8. Bioefficacy of Lantana camara L. against Some Human Pathogens

    Science.gov (United States)

    Sharma, B.; Kumar, P.

    2009-01-01

    Antimicrobial efficacy of flavonoids (free and bound) and crude alkaloids of Lantana camara L. was determined by disc diffusion assay against three bacteria (Escherichia coli, Proteus mirabilis, and Staphylococcus aureus) and two fungi (Candida albicans and Trichophyton mentagrophytes). Minimum inhibitory concentration, minimum bactericidal/fungicidal concentration and total activity were also studied. Most susceptible microorganism in the present study was C. albicans followed by P. mirabilis, S. aureus, E. coli, and T. mentagrophytes. The range of minimum inhibitory concentration of tested extracts was 0.039-0.625 mg/ml while minimum bactericidal/fungicidal concentration ranged from 0.078-1.25 mg/ml. Six extracts out of eleven tested showed same values of minimum inhibitory concentration and minimum bactericidal/fungicidal concentration, while rest showed higher values of minimum bactericidal/fungicidal concentration. Highest total activity (120.51 ml/g) was observed for bound flavonoids of root against Candida albicans and Staphylococcus aureus. Results of the present investigation indicate that Lantana camara has good antimicrobial activity with low range of minimum inhibitory concentration hence can be exploited for future plant based antimicrobial drugs. PMID:20502587

  9. Cytogenetic characterization of Lippia alba and Lantana camara (Verbenaceae) from Brazil.

    Science.gov (United States)

    Brandão, Aline Dias; Viccini, Lyderson Facio; Salimena, Fátima Regina Gonçalves; Vanzela, André Luiz Laforga; Recco-Pimentel, Shirlei Maria

    2007-03-01

    The aim of this work was to determine the cytogenetic characteristics of Brazilian Lippia alba (Mill) N. E. Brown and Lantana camara Plum. that could be useful for future characterization of these genera. Our analyses revealed that Li. alba has 2n=30 chromosomes consisting of ten metacentric and five submetacentric pairs, while La. camara has 44 metacentric chromosomes. The large blocks of heterochromatin seen in both species suggest an apomorphic condition. Six 45S rDNA sites were detected in both species by fluorescence in situ hybridization (FISH). Two and four 5S rDNA sites were observed in Li. alba and La. camara, respectively. Meiotic analysis revealed a normal chromosomal behaviour. The number of chromosomes and the presence of 45S rDNA and 5S rDNA sites do not exclude a possible polyploid origin. The cytogenetic differences between La. camara and Li. alba may be useful markers for differentiating these species.

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

    Science.gov (United States)

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

    2012-12-01

    To investigate the antioxidant activity of methanolic extracts of Lantana camara (L. camara) various parts and the determination of their total phenolics content. The extract was screened for possible antioxidant activities by free radical scavenging activity(DPPH), xanthine oxidase inhibition activity and Griess-Ilosvay method. 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. This study suggests that L. camara extracts exhibit great potential for antioxidant activity and may be useful for their nutritional and medicinal functions.

  11. Climate Warming May Facilitate Invasion of the Exotic Shrub Lantana camara: e105500

    National Research Council Canada - National Science Library

    Qiaoying Zhang; Yunchun Zhang; Shaolin Peng; Kristjan Zobel

    2014-01-01

    .... 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...

  12. Molecular Characterization of Begomoviruses and DNA Satellites Associated with a New Host Spanish Flag (Lantana camara) in India

    OpenAIRE

    Marwal, Avinash; Kumar Sahu, Anurag; Gaur, Rajarshi Kumar

    2013-01-01

    In the year 2010 yellowing of leaf vein disease was observed on Spanish Flag (Lantana camara) in Sirsa, Haryana province, India. There was no earlier report of association of begomovirus and DNA satellites with Lantana camara. Therefore, molecular characterization and understanding of the genomic analysis of begomovirus infecting Lantana camara is imperative for the pathogen diagnosis and disease management. This is the first report and molecular characterization of a begomovirus associated w...

  13. Phytochemical screening, antioxidants and antimicrobial potential of Lantana camara in different solvents

    Directory of Open Access Journals (Sweden)

    Rabia Naz

    2013-12-01

    Full Text Available Objective: To evaluate the antioxidant activity, hydrogen peroxide radicals scavenging activity, reducing power, the total phenolic and flavonoids contents, and antimicrobial and antifungal activities of methanol, ethanol and water extracts of leaves of Lantana camara (L. camara. Methods: Methanol, ethanol and water extracts were evaluated against four Gram positive and Gram negative bacterial isolates (Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, Bacillus subtilis and two fungal strains (Aspergillus fumigatus and Aspergillus flavus. Methanol extract at different concentrations was tested for antioxidant potential and phytochemicals were determined by using spectrophotometric method. Results: The total phenolic content was (40.859依0.01 7 mg gallic acid/g in the leaves of L. camara, while the total flavonoids was (53.112依0.199 mg/g dry weight. Methanol leaf extract of L. camara showed maximum antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa and was also effective against other bacterial strains as compared to ethanol and aqueous extracts of leaves. The methanol leaf extract of L. camara exhibited significant inhibition (71% and (66% against Aspergillus fumigatus and Aspergillus flavus respectively. Conclusions: The methanol extract of the L. camara leaves is effective against selected bacterial and fungal strains. Its phytochemical contents have broad antimicrobial properties and the plant might be a novel source of antimicrobial drug.

  14. Phytochemical screening, antioxidants and antimicrobial potential of Lantana camara in different solvents

    Science.gov (United States)

    Naz, Rabia; Bano, Asghari

    2013-01-01

    Objective To evaluate the antioxidant activity, hydrogen peroxide radicals scavenging activity, reducing power, the total phenolic and flavonoids contents, and antimicrobial and antifungal activities of methanol, ethanol and water extracts of leaves of Lantana camara (L. camara). Methods Methanol, ethanol and water extracts were evaluated against four Gram positive and Gram negative bacterial isolates (Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, Bacillus subtilis) and two fungal strains (Aspergillus fumigatus and Aspergillus flavus). Methanol extract at different concentrations was tested for antioxidant potential and phytochemicals were determined by using spectrophotometric method. Results The total phenolic content was (40.859±0.017) mg gallic acid/g in the leaves of L. camara, while the total flavonoids was (53.112±0.199) mg/g dry weight. Methanol leaf extract of L. camara showed maximum antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa and was also effective against other bacterial strains as compared to ethanol and aqueous extracts of leaves. The methanol leaf extract of L. camara exhibited significant inhibition (71%) and (66%) against Aspergillus fumigatus and Aspergillus flavus respectively. Conclusions The methanol extract of the L. camara leaves is effective against selected bacterial and fungal strains. Its phytochemical contents have broad antimicrobial properties and the plant might be a novel source of antimicrobial drug.

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

    Science.gov (United States)

    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.

  16. Caracterización morfológica de células pulpares

    OpenAIRE

    Merino, Graciela; Blascetti, Nahuel; Mayocchi, Karina; Butler, Teresa Adela; Basal, Roxana Lía; Dorati, Pablo; Paggi, Ricardo; Bellesi, Carolina; Astudillo, Lisandro; Pinola, Lidia; Cantarini, Luis Martín; Micinquevich, Susana

    2017-01-01

    La investigación básica sobre células madre y el desarrollo de aplicaciones terapéuticas es uno de los campos de la investigación biomédica que más atención recibe en la actualidad. Las células madre dentales comparten muchas características con las células madre de la médula ósea de donde normalmente se extraen para las investigaciones. Objetivo: realizar una síntesis de la descripción morfológica de las células pulpares en cultivo. Para la caracterización se utilizó pulpas de gérmenes de te...

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

    Directory of Open Access Journals (Sweden)

    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. [Determination of 22 inorganic elements in different parts of Lantana camara by ICP-OES].

    Science.gov (United States)

    Zhou, Wei-ming; Wang, Ru-yi; Chen, Liu-sheng; Huang, Chuan-bin

    2014-09-01

    To determine the contents of 22 inorganic elements in different parts of Lantana camara by inductively coupled plasma optical emission spectroscopy (ICP-OES). HNO3-H2 02 digested system was used to completely decomposed the organic compounds effectually by microwave digestion. 22 inorganic elements such as K, Ca, Mg, Fe, Al, Na, Zn, Mn and Cr were determined by ICP-OES under set up working conditions. The contents of K, Ca and Mg were the most in different parts of Lantana camrnara; The contents of K, Ca, Mg, Mn, Sr and Cu in the leaves of Lantana camara were more than that in the root and the branch. The contents of Fe and Na in the root of Lantana camara were more than that in the leaves and the branch. The contents of Pb and Cd were higher than the national standard and Cr had high content in different parts of Lantana camara. The determination method is quick, easy and accurate with high sensitivity,which can determine the contents of 22 inorganic elements accurately in different parts of Lantana camara.

  19. Behavioral foraging responses by the butterfly Heliconius melpomene to Lantana camara floral scent.

    Science.gov (United States)

    Andersson, Susanna; Dobson, Heidi E M

    2003-10-01

    Floral color has been shown to influence flower selection by butterflies, but few studies have investigated the role of floral scent. In this study, adults of Heliconius melpomene L. (Lepidoptera: Nymphalidae: Heliconiinae) were tested in two-choice bioassays to investigate their ability to distinguish floral scent of the butterfly pollinated plant Lantana camara L. (Verbenaceae) from other plant scents. The relative importance of floral scent vs. color was also studied. Butterfly foraging behavior was measured as probing with proboscis. This probing, on floral models varying in scent and color, was timed. When given a choice of floral and vegetative scents of L. camara, newly emerged butterflies preferred floral scent, indicating an innate response to floral scents. When butterflies were conditioned to L. camara floral scent by offering the scent with yellow color and sugar water, yellow color elicited stronger feeding responses than did the floral scent. However, the floral scent of L. camara was preferred to that of the novel species Philadelphus coronarius L. (Hydrangiaceae). The floral scent of L. camara was dominated by tepenoid compounds, while that of P. coronarius by fatty acid derivatives, thus demonstrating totally different compositions. It is concluded that, while H. melpomene butterflies often use visual floral traits when selecting which flowers to visit, floral scents elicit behavioral responses that initiate and maintain foraging on flowers.

  20. Digalacturonide flavones from Egyptian Lantana camara flowers with in vitro antioxidant and in vivo hepatoprotective activities.

    Science.gov (United States)

    Abou El-Kassem, Lamia T; Mohammed, Reda S; El Souda, Sahar S; El-Anssary, Amira A; Hawas, Usama W; Mohmoud, Khaled; Farrag, Abdel Razik H

    2012-01-01

    A new digalacturonide flavone, luteolin 7-O-beta-galacturonyl-(2 --> 1)-O-beta-galacturonide (1), was isolated along with nine known flavone glycosides from the aqueous methanolic extract of Lantana camara (L.) flowers. Their structures were determined on the basis of the spectral data. The extract of L. camara was evaluated for antioxidant and hepatoprotective properties in the acetaminophen-induced mouse liver damage model. 1 exhibited significant antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay with an IC50 value of 27.2 microM. Pre-treatment with L. camara extract (25 and 75 mg/ kg body weight) decreased the activities of alkaline phosphatase (ALP), serum glutamate oxaloacetate transaminase (SGOT), and serum glutamate pyruvate transaminase (SGPT) enzyme levels that were elevated by acetaminophen. Both doses of the L. camara extract ameliorated the histopathological and histochemical alterations induced by acetaminophen. The results indicate that the L. camara extract possesses hepatoprotective activity against acetaminophen-induced liver damage.

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

    Science.gov (United States)

    Barros, Luiz Marivando; Duarte, Antonia Eliene; Morais-Braga, Maria Flaviana Bezerra; Waczuk, Emily Pansera; Vega, Celeste; Leite, Nadghia Figueiredo; de Menezes, Irwin Rose Alencar; Coutinho, Henrique Douglas Melo; Rocha, João Batista Teixeira; Kamdem, Jean Paul

    2016-02-10

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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. © 2016 Verlag Helvetica Chimica Acta AG, Zürich.

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

    Directory of Open Access Journals (Sweden)

    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.

  5. Espessura do assoalho da câmara pulpar de molares decíduos inferiores tratados pelo TRA, pulpotomia e pulpectomia

    OpenAIRE

    Santos, Vanessa Aparecida Carvalho [UNESP

    2008-01-01

    O assoalho da câmara pulpar de molares decíduos apresenta tecido dentinário permeável podendo conter também canais acessórios que conectam a polpa com a área de furca, estabelecendo uma via de transmissão de toxinas bacterianas. O resultado deste processo culmina com danos no assoalho da câmara pulpar, chegando a ocasionar a sua redução. O objetivo deste estudo é o de verificar a espessura do assoalho da câmara pulpar de molares decíduos inferiores, através de imagens radiográficas, relaciona...

  6. Kinetic modelling of laccase mediated delignification of Lantana camara.

    Science.gov (United States)

    Gujjala, Lohit K S; Bandyopadhyay, Tapas K; Banerjee, Rintu

    2016-07-01

    Enzymatic delignification is seen as a green step in biofuels production owing to its specificity towards lignin and its proper understanding requires a kinetic study to decipher intricate details of the process such as thermodynamic parameters viz., activation energy, entropy change and enthalpy change. A system of two coupled kinetic models has been constructed to model laccase mediated delignification of Lantana camara. From the simulated output, activation energy was predicted to be 45.56 and 56.06 kJ/mol, entropy change was observed to be 1.08 × 10(2) and 1.05 × 10(2)cal/mol-K and enthalpy change was determined to be 3.33 × 10(4) and 3.20 × 10(4)cal/mol, respectively from Tessier's and Michaelis Menten model. While comparing the prediction efficiency, it was noticed that Tessier's model gave better performance. Sensitivity analysis was also conducted and it was observed that the model was most sensitive towards temperature dependent kinetic constants. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. Impact of Lantana camara in the Indian society

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    Reshmi Chatterjee

    2015-06-01

    Full Text Available Lantana camara, an introduced species by the British has turned itself in to a noxious weed, which has expanded itself in almost all the possible habitats of India. It is a major threat to the ecosystem, including plants and animals. Attempt to combat the further spread of this nuisance species has been of little help. Therefore, in the present discussion an attempt on its impact, toxicity, uses and therapeutic properties have been discussed. A carefully knitted plan should be framed emphasizing on exploiting this species economically as well as on taming the present threat so that the Indian society can be benefitted by properly utilizing the plant and thereby also conserve the ecosystem with its bio resources. The present review paper focuses on the various benefitting sides of the Lantana that would create better livelihood opportunities. DOI: http://dx.doi.org/10.3126/ije.v4i2.12663 International Journal of Environment Vol.4(2 2015: 348-354

  8. A review of the hepatotoxic plant Lantana camara.

    Science.gov (United States)

    Sharma, Om P; Sharma, Sarita; Pattabhi, Vasantha; Mahato, Shashi B; Sharma, Pritam D

    2007-05-01

    Lantana (Lantana camara Linn) is a noxious weed that grows in many tropical and subtropical parts of the world. Ingestion of lantana foliage by grazing animals causes cholestasis and hepatotoxicity. Both ruminants and nonruminant animals such as guinea pigs, rabbits, and female rats are susceptible to the hepatotoxic action of lantana toxins. The hepatotoxins are pentacyclic triterpenoids called lantadenes. Molecular structure of lantadenes has been determined. Green unripe fruits of the plant are toxic to humans. Lantana spp. exert allelopathic action on the neighboring vegetation. The allelochemicals have been identified as phenolics, with umbelliferone, methylcoumarin, and salicylic acid being the most phytotoxic. In addition to phenolics, a recent report indicates lantadene A and B as more potent allelochemicals. Management of lantana toxicosis in animals is achieved by drenching with activated charcoal and supportive therapy. Recent reports on the bilirubin clearance effect of Chinese herbal tea Yin Zhi Huang (decoction of the plant Yin Chin, Artemisia capillaries, and three other herbs) or its active ingredient 6,7-dimethylesculetin, in jaundice are very exciting and warrant investigations on its, possible, ameliorative effects in lantana intoxicated animals. Research is being conducted on new drug discovery based on natural products in different parts of the lantana plant.

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

    OpenAIRE

    Edison Gabriel Quintero Ricardo; Antonio Díaz Caballero; Eduardo Covo Morales

    2014-01-01

    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; ...

  10. Alterações pulpares e periapicais decorrentes de sobrecarga oclusal em ratos associadas ou não à periodontite induzida

    OpenAIRE

    Luiz Fernando Varrone

    2010-01-01

    As alterações pulpares e periapicais decorrentes de sobrecarga oclusal são problemas que acometem considerável parcela da população. Geralmente causadas por contato prematuro de restaurações com material em excesso, provocam um trauma de baixa intensidade, porém de alta frequência. Objetivo: Avaliar as alterações pulpares e periapicais, induzidas por esta sobrecarga oclusal associada ou não à doença periodontal induzida em dentes de ratas. Método: Foram utilizadas vinte ratas (Wistar) com nov...

  11. 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

  12. Importancia de la semiología del dolor en el diagnóstico de un proceso inflamatorio pulpar

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    Andrés 0 Pérez Ruiz

    2011-09-01

    Full Text Available El dolor es un síntoma de extraordinaria importancia en la práctica estomatológica y particularmente en lo concerniente a las alteraciones de la pulpa dentaria. Con el objetivo de profundizar en el conocimiento de las fases por las que atraviesa un proceso inflamatorio pulpar, que permiten predecir sus manifestaciones dolorosas, se realizó una revisión bibliográfica sobre el tema con un enfoque multidisciplinario y básico-clínico. Se utilizó el método documental para el análisis y tratamiento de la información ofrecida por las fuentes teóricas. El sitio en Internet Google fue empleado como fundamental motor de búsqueda y Lilacs, Hinari, Medline y PubMed fueron las bases de datos más revisadas. La clasificación del estado de inflamación pulpar, que atiende a eventos histopatológicos que no se pueden visualizar, resulta más difícil. Se podría lograr mayor precisión en un diagnóstico basado en el curso que sigue el dolor, de acuerdo a la magnitud del compromiso inflamatorio y apoyado en la rica semiología que se puede obtener si se sigue la trayectoria de las variables del estímulo nociceptivo. El incremento y profundización de los conocimientos en este campo contribuiyó significativamente a un mejor diagnóstico y tratamiento de los procesos inflamatorios pulpares.

  13. Etiología, clasificación y patogenia de la patología pulpar y periapical

    OpenAIRE

    López Marcos, Joaquín Francisco

    2004-01-01

    En la actualidad, gran parte de los tratamientos que se realizan en la clínica son debidos a patologías que afectan a la pulpa y al periápice. La pulpa es un tejido ricamente vascularizado e inervado, delimitado por un entorno inextensible como es la dentina, con una circulación sanguínea terminal y con una zona de acceso circulatorio –periápice– de pequeño calibre. Todo ello, hace que la capacidad defensiva del tejido pulpar sea muy limitada ante las diversas agresiones que pueda sufrir. ...

  14. Importancia de la semiología del dolor en el diagnóstico de un proceso inflamatorio pulpar

    OpenAIRE

    Andrés Pérez Ruiz; Julia María Martínez Lima; Jannette Carmona Betancourt; María Elena Urgelles Jiménez

    2011-01-01

    El dolor es un síntoma de extraordinaria importancia en la práctica estomatológica y particularmente en lo concerniente a las alteraciones de la pulpa dentaria. Con el objetivo de profundizar en el conocimiento de las fases por las que atraviesa un proceso inflamatorio pulpar, que permiten predecir sus manifestaciones dolorosas, se realizó una revisión bibliográfica sobre el tema con un enfoque multidisciplinario y básico-clínico. Se utilizó el método documental para el análisis y tratamiento...

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

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    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.

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

    Science.gov (United States)

    Taylor, Subhashni; Kumar, Lalit; Reid, Nick; Kriticos, Darren J

    2012-01-01

    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.

  17. Evaluation of wound healing activity of Lantana camara L. - a preclinical study.

    Science.gov (United States)

    Nayak, B Shivananda; Raju, S Sivachandra; Eversley, Mathew; Ramsubhag, Adash

    2009-02-01

    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 was to investigate excision wound healing activity of the leaf extract of L. camara in rats. The animals were divided into two groups of 12 each in both the models. The test group animals were treated with the aqueous extract of L. camara (100 mg/kg/day) topically and the control group animals were left untreated. Wound healing efficacy was measured by determining the morphological and biochemical parameters. Wound healing time, wound contraction and synthesis of collagen were monitored periodically. Antimicrobial activities of the extract against the microorganisms were also assessed. Treatment of the wounds with extract enhanced significantly the rate of wound contraction (98%), synthesis of collagen and decreased mean wound healing time. These studies demonstrate that L. camara is effective in healing excision wounds in the experimental animal and could be evaluated as a therapeutic agent in tissue repair processes associated with skin injuries. Copyright (c) 2008 John Wiley & Sons, Ltd.

  18. Variation in antioxidant and antimicrobial activities in Lantana camara L. flowers in relation to extraction methods.

    Science.gov (United States)

    Manzoor, Madiha; Anwar, Farooq; Sultana, Bushra; Mushtaq, Muhammad

    2013-01-01

    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. 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. 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. 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-assisted 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.

  19. Global invasion of Lantana camara: has the climatic niche been conserved across continents?

    Science.gov (United States)

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

    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 native niche in South America with its expressed niche in Africa, Australia and India. Using MaxEnt, the estimated niche for the native region was projected onto each invaded region to generate potential distributions there. Our results demonstrate that while L. camara occupied subsets of its original native niche in Africa and Australia, in India its niche shifted significantly. There, 34% of the occurrences were detected in warmer habitats nonexistent in its native range. The estimated niche for India was also projected onto Africa and Australia to identify other vulnerable areas predicted from the observed niche shift detected in India. As a result, new potentially invasible areas were identified in central Africa and southern Australia. Our findings do not support the hypothesis of niche conservatism for the invasion of L. camara. The mechanisms that allow this species to expand its niche need to be investigated in order to improve our capacity to predict long-term geographic changes in the face of global climatic changes.

  20. Nematicidal natural products from the aerial parts of Lantana camara Linn.

    Science.gov (United States)

    Qamar, F; Begum, S; Raza, S M; Wahab, A; Siddiqui, B S

    2005-09-01

    Lantanilic acid, camaric acid and oleanolic acid possessing nematicidal activity were isolated from the methanolic extract of the aerial parts of Lantana camara Linn. through bio-assay guided fractionation. These compounds exhibited 98%, 95% and 70% mortality respectively against root-knot nematode Meloidogyne incognita at 0.5% concentration. Conventional nematicide furadan showed 100% mortality at this concentration.

  1. High alpha cellulose from fast growing species such as Lantana camara (linn) and Hibiscus cannabinus

    Energy Technology Data Exchange (ETDEWEB)

    Manavalan, R.; Mithal, B.M.; Anand, S.M.; Chawla, J.S.

    1980-01-01

    Prehydrolysis of L. camara and kenaf with H/sub 2/O at 165 degrees, and kraft cooking gave pulp in 28-40% yield, and permanganate number 8.5-12. Bleaching of the pulps from these species by CEHED sequence gave products in 26-41% yield, and with 83-90% brightness.

  2. 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.

  3. Avaliação da expressão da fibronectina e tenascina após capeamento pulpar utilizando diferentes agentes hemostáticos (modelo humano) e diferentes materiais capeadores (modelo animal)

    OpenAIRE

    Baldissera, Elaine de Fátima Zanchin

    2006-01-01

    O controle do sangramento frente a uma exposição pulpar é de fundamental importância no sucesso do capeamento direto. As soluções de hipoclorito de sódio e de gluconato de clorexidina têm sido utilizadas como agentes de limpeza e hemostasia na terapia pulpar conservadora. Alguns estudos têm indicado para o controle da hemorragia e sucesso do capeamento pulpar adesivo o hipoclorito de sódio (COX et al, 1998; COX et al., 1999). Além de ser bom agente antimicrobiano, o hipoclorito possui elev...

  4. Osmotic and morphological effects on red blood cell membrane: action of an aqueous extract of Lantana camara

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    Adalgisa I. Maiworm

    Full Text Available The Lantana camara ("cambara de espinho" leaves infusions are used popularly in some countries to treat gastrointestinal diseases. Osmotic fragility assay and morphometric analysis have been used to verify the interaction of drugs with the membrane of red blood cells (RBC. The aim of this work was to evaluate the effects of an aqueous extract of Lantana camara on the osmotic fragility and on the morphology of RBC. Blood samples were treated with extract of Lantana camara (10 mg/mL, osmotic fragility assay and morphological analysis were carried out. In the presence of the extract, the data obtained indicated (i a significant (p < 0.05 increase of hemolysis and (ii modifications on the morphology of RBC. These effects of the Lantana camara may be associated with some pharmacological properties of the chemical compounds of this studied extract.

  5. 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

  6. Pulpar temperature changes during mechanical reduction of equine cheek teeth: comparison of different motorised dental instruments, duration of treatments and use of water cooling.

    Science.gov (United States)

    O'Leary, J M; Barnett, T P; Parkin, T D H; Dixon, P M; Barakzai, S Z

    2013-05-01

    Although equine motorised dental instruments are widely used, there is limited information on their thermal effect on teeth. The recently described variation in subocclusal secondary dentine depth overlying individual pulp horns may affect heat transmission to the underlying pulps. This study compared the effect of 3 different equine motorised dental instruments on the pulpar temperature of equine cheek teeth with and without the use of water cooling. It also evaluated the effect of subocclusal secondary dentine thickness on pulpar temperature changes. A thermocouple probe was inserted into the pulp horns of 188 transversely sectioned maxillary cheek teeth with its tip lying subocclusally. Pulpar temperature changes were recorded during and following the continuous use of 3 different equine motorised dental instruments (A, B and C) for sequential time periods, with and without the use of water cooling. Using motorised dental instrument B compared with either A or C increased the likelihood that the critical temperature was reached in pulps by 8.6 times. Compared with rasping for 30 s, rasping for 45, 60 and 90 s increased the likelihood that the critical temperature would be reached in pulps by 7.3, 8.9 and 24.7 times, respectively. Thicker subocclusal secondary dentine (odds ratio [OR] = 0.75/mm) and water cooling (OR = 0.14) were both protective against the likelihood of the pulp reaching the critical temperature. Prolonged rasping with motorised dental instruments increased the likelihood that a pulp would be heated above the critical temperature. Increased dentinal thickness and water cooling had protective roles in reducing pulpar heating. Motorised dental instruments have the potential to seriously damage equine pulp if used inappropriately. Higher speed motorised dental instruments should be used for less time and teeth should be water cooled during or immediately after instrument use to reduce the risk of thermal pulpar damage. © 2012 EVJ Ltd.

  7. Importancia de la semiología del dolor en el diagnóstico de un proceso inflamatorio pulpar Significance of pain's Symptomatology in the diagnosis of pulpal inflammatory process

    National Research Council Canada - National Science Library

    Andrés 0 Pérez Ruiz; Julia María Martínez Lima; Jannette Carmona Betancourt; María Elena Urgelles Jiménez

    2011-01-01

    .... Con el objetivo de profundizar en el conocimiento de las fases por las que atraviesa un proceso inflamatorio pulpar, que permiten predecir sus manifestaciones dolorosas, se realizó una revisión...

  8. 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)

    OpenAIRE

    DELFINO, C.S.; RIBEIRO, C.; Vieira, G. F.; 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 ...

  9. O direito criminal pós-positivista e o devido processo penal constitucional

    OpenAIRE

    Balico, Vladimir

    2008-01-01

    O presente trabalho analisa a hermenêutica do direito no âmbito criminal, à luz da Constituição Federal, em um Estado Constitucional e Democrático de Direito, que tem como idéia síntese a dignidade da pessoa humana. A idéia de Justiça passa pelo conceito de proporcionalidade, vale dizer, não há interpretação possível fora do texto constitucional, notadamente em matéria criminal, que atribua a cada um o que lhe é devido, na medida do seu merecimento, sem que se faça a ponderação dos valores em...

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

    Science.gov (United States)

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

    2013-06-01

    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). 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. 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. 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. Copyright © 2013 Hainan Medical College. Published by Elsevier B.V. All rights reserved.

  11. Mass Transfer Studies on Adsorption of Phenol from Wastewater Using Lantana camara, Forest Waste

    Directory of Open Access Journals (Sweden)

    C. R. Girish

    2016-01-01

    Full Text Available Adsorption is one of the important treatment methods for the removal of pollutants from wastewater. The determination of rate controlling step in the process is important in the design of the process. Therefore, in the present work, mass transfer studies were done to evaluate the rate-limiting step in the adsorption of phenol from aqueous solution onto Lantana camara. Different mass transfer models were used to find the rate-limiting step and also to find the values of external mass transfer coefficient and diffusion coefficient. The Biot number was found to investigate the importance of external mass transfer to intraparticle diffusion. From the various models studied and the Biot numbers obtained, it was found that the adsorption on Lantana camara was controlled by film diffusion. The sensitivity analysis was performed to study the significance of the model parameters on the adsorption process.

  12. Effects of Lantana camara (Verbenaceae) on general reproductive performance and teratology in rats.

    Science.gov (United States)

    Mello, Fernanda B; Jacobus, Daniela; Carvalho, Kelly; Mello, João R B

    2005-03-15

    Lantana camara L. (Verbenaceae) possesses several medicinal properties and it is used in folk medicine with antipyretic, antimicrobial and antimutagenic properties. This plant is one of the 10 most noxious weeds in the world. Lantana poisoning have caused severe economic losses and was the major cause of livestock mortality and morbidity. In this article we report the effects of hydroalcoholic extract from Lantana camara var. aculeata leaves on fertility, general reproductive performance and teratology in the rat. The data showed that the extract interfered in the frequency of fetal skeleton anomalies from dams treated with the extract and induced embryotoxicity as indicated by post-implantation loss, without any signs of maternal toxicity. The other parameters evaluated did not suggest modifications.

  13. Nematicidal and allelopathic responses of Lantana camara root extract

    OpenAIRE

    S.S. Shaukat; Siddiqui, I.A.; N.I. Ali; S A Ali; G.H. Khan

    2003-01-01

    The impact of root leachates of Lantana camara L., a tropical weed, against Meloidogyne javanica, the root-knot nematode, was tested under laboratory and pot conditions. Concentrated and diluted root leachate caused substantial mortality of M. javanica juveniles. Significant suppression of the nematode was achieved when soil was treated with a full-strength concentration of the leachate. Whilst this high concentration retarded plant height and shoot fresh weight, more diluted conc...

  14. Adulticidal activity of essential oil of Lantana camara leaves against mosquitoes.

    Science.gov (United States)

    Dua, V K; Pandey, A C; Dash, A P

    2010-03-01

    Development of insect resistance to synthetic pesticides, high operational cost and environmental pollution have created the need for developing alternative approaches to control vector-borne diseases. In the present study we have investigated the insecticidal activity of essential oil isolated from the leaves of Lantana camara against mosquito vectors. Essential oil was isolated from the leaves of L. camara using hydro-distillation method. Bioassay test was carried out by WHO method for determination of adulticidal activity against mosquitoes. Different compounds were identified by gas chromatography-mass spectrometry analysis. LD(50) values of the oil were 0.06, 0.05, 0.05, 0.05 and 0.06 mg/cm(2) while LD(90) values were 0.10, 0.10, 0.09, 0.09 and 0.10 mg/cm(2) against Ae. aegypti, Cx. quinquefasciatus, An. culicifacies, An. fluvialitis and An. stephensi respectively. KDT(50) of the oil were 20, 18, 15, 12, and 14 min and KDT(90) values were 35, 28 25, 18, 23 min against Ae. aegypti, Cx. quinquefasciatus, An. culicifacies, An. fluviatilis and An. stephensi, respectively on 0.208 mg/cm(2) impregnated paper. Studies on persistence of essential oil of L. camara on impregnated paper revealed that it has more adulticidal activity for longer period at low storage temperature. Gas chromatographic-mass spectrometric analysis of essential oil showed 45 peaks. Caryophyllene (16.37%), eucalyptol (10.75%), alpha-humelene (8.22%) and germacrene (7.41%) were present in major amounts and contributed 42.75 per cent of the total constituents. Essential oil from the leaves of L. camara possesses adulticidal activity against different mosquito species that could be utilized for development of oil-based insecticide as supplementary to synthetic insecticides.

  15. A new 28-noroleanane triterpenoid from the aerial parts of Lantana camara Linn.

    Science.gov (United States)

    Begum, Sabira; Zehra, Syeda Qamar; Ayub, Anjum; Siddiqui, Bina Shaheen

    2010-08-01

    A new 28-norolean-12,17-diene triterpene lantigdienone (1) oxidised at C-11 and C-22 has been isolated from the aerial parts of Lantana camara, along with two known compounds, camarinin (2) and camangeloyl acid (3). The structure of compound 1 was elucidated as 3,25-epoxy-3alpha-hydroxy-22beta-[beta,betadimethylacryloyloxy]-11-oxo-28-norolean-12,17-diene, with the help of spectral studies.

  16. Patologías pulpares y periapicales más frecuentes en urgencias en 2 clínicas estomatológicas

    Directory of Open Access Journals (Sweden)

    Dinhora Quiñones Márquez

    2000-08-01

    Full Text Available Las patologías pulpares y periapicales son unas de las enfermedades que más llevan a los pacientes a acudir a una consulta de urgencia estomatológica debido a su sintomatología. Es de gran importancia realizar un correcto diagnóstico en este momento para brindar la terapeútica adecuada.La frecuencia de estas patologías en consulta de urgencia fue lo que nos motivó a la realización de este trabajo, el cual tuvo entre sus objetivo contribuir al conocimiento de las patologías pulpares y periapicales más frecuentes en urgencias, determinar la patología pulpar aguda más frecuente según grupos de edad, así como la patología periapical aguda. Para realizar el trabajo se examinaron 70 pacientes de las Clínicas Estomatológicas "Dr. Mario Pozo Ochoa" y "Manuel Angulo Farrán". Se observó que las patologías agudas fueron las que más se presentaron, entre ellas, la hiperemia y el absceso alveolar agudo.Pulpar and periapical pathologies are some of the diseases that make the patients attend the dental emergency department due to their symptomatology. It is very important to make a right diagnosis at this moment in order to give the adequate therapy. The frequency of these pathologies at the dental emergency department led us to write this paper. One of its objectives was to contribute to the knowledge of the most frequent pulpar and periapical pathologies in emergencies and to determine the most common acute pulpar pathology according to age groups and the acute periapical pathology. 70 patients from the ?Dr. Mario Pozo Ochoa? and ?Manuel Angulo Farrán? Dental Clinics were examined. It was observed that the acute pathologies were the most frequent and, among them, hyperemia and acute alveolar abscess.

  17. Essential oil from leaves of Lantana camara: a potential source of medicine against leishmaniasis

    Directory of Open Access Journals (Sweden)

    Rachel R. P. Machado

    2012-04-01

    Full Text Available Leishmaniasis is an infection of viscera or tegument caused by protozoa Leishmania sp. The extensive period required for the treatment, which involves the use of toxic medicines, leads patients to drop treatment increasing the development of resistant forms of Leishmania sp. Lantana camara L., Verbenaceae, is a tropical plant native from America. Folk uses have been described for treatment of tumors, tetanus, rheumatism and malaria. This study evaluates the leishmanicidal activity of the essential oil of leaves from L. camara on promastigote forms of Leishmania chagasi and L. amazonensis and its toxic effects on Artemia salina (brine shrimp test, macrophage cultures and BALB/c mice. The chemical composition was evaluated using the gas chromatography coupled with mass spectrometer (GC-MS. Thirty substances, mostly mono and sesquiterpenes were identified. The most representative constituents were: germacrene D (24.90%, farnesene derivatives (22% and (E-cariophylene (14.31%. Bioassays revealed a significant leishmanicidal activity of essential oil against L. amazonensis (IC50 0.25 µg/ mL and a potential toxic effect on Brine shrimp (LC50 10 µg/mL and macrophage assays (CC50 4 µg/mL, while there was no toxic manifestation on mice. The data show the relevant potential of L. camara as a source of medicine for leishmaniasis treatment.

  18. Chemical constituents and evaluation of cytotoxic and antifungal activity of Lantana camara essential oils

    Directory of Open Access Journals (Sweden)

    Lídia B. P. Medeiros

    2012-08-01

    Full Text Available The essential oil (EO of aerial parts of Lantana camara L., Verbenaceae, from Simões, Piaui, Northeast of Brazil, were obtained by hydrodistillation and analyzed by GC-FID and GC-MS techniques. In total, 68 compounds were identified. The most representative compounds of the oil were mono and sesquiterpenes. The main compounds found in the oil of the leaves in different months were β-caryophyllene (10.5%, in June of 2009, sabinene (7.98%, in September of 2008, limonene (7.68%, in September of 2008, spathulenol (11.64%, in September of 2008. The oil from stems of L. camara was characterized by a largest amount of sesquiterpenoids, with spatulenol (15.9% and caryophyllene oxide (17.1% in June of 2009, as main components. β-Gurjunene (32.7%, in September of 2008 was the most prominent compound in the stems oils, which was absent or at very low relative abundance in leaves. L. camara essential oils from leaves were cytotoxic to V79 mammalian cells and also to Artemia salina, showing 50% lethal concentration (LC50 values from 0.23 µg/mL. The in vitro data obtained in this study suggested that EO may also be effective treating yeast infection in patients infected with fluconazole and terbinafine resistant isolates, but its toxicity must be monitored carefully.

  19. Chemical composition and resistance-modifying effect of the essential oil of Lantana camara Linn.

    Science.gov (United States)

    Sousa, Erlânio O; Silva, Natálya F; Rodrigues, Fabiola F G; Campos, Adriana R; Lima, Sidney G; Costa, José Galberto M

    2010-04-01

    In this work, the chemical constituents, antibacterial and modulatory activities of the essential oil of Lantana camara Linn were studied. The essential oil was extracted from the leaves of L. camara by hydrodistillation method using Clevenger's apparatus and its chemical constituents were separated and identified by GC-MS, and the relative content of each constituent was determined by area normalization. Among the 25 identified components, bicyclogermacrene (19.42%), isocaryophyllene (16.70%), valecene (12.94%) and germacrene D (12.34%) were the main constituents. The oil was examined to antibacterial and modulatory activities against the multiresistant strains of Escherichia coli and Staphylococcus aureus by microdilution test. The results show an inhibitory activity to E. coli (MIC 512 mug/ml) and S. aureus (MIC 256 mug/ml). The synergism of the essential oil and aminoglycosides was verified too, with significant reduction of MICs (7 x, 1250-5 mug/ml) against E. coli. It is suggested that the essential oil of Lantana camara Linn could be used as a source of plant-derived natural products with resistance-modifying activity.

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

    Science.gov (United States)

    Ajitha, B; Ashok Kumar Reddy, Y; Sreedhara Reddy, P

    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. Copyright © 2015 Elsevier B.V. All rights reserved.

  1. Chemical constituents and evaluation of cytotoxic and antifungal activity of Lantana camara essential oils

    Directory of Open Access Journals (Sweden)

    Lídia B. P. Medeiros

    2012-12-01

    Full Text Available The essential oil (EO of aerial parts of Lantana camara L., Verbenaceae, from Simões, Piaui, Northeast of Brazil, were obtained by hydrodistillation and analyzed by GC-FID and GC-MS techniques. In total, 68 compounds were identified. The most representative compounds of the oil were mono and sesquiterpenes. The main compounds found in the oil of the leaves in different months were β-caryophyllene (10.5%, in June of 2009, sabinene (7.98%, in September of 2008, limonene (7.68%, in September of 2008, spathulenol (11.64%, in September of 2008. The oil from stems of L. camara was characterized by a largest amount of sesquiterpenoids, with spatulenol (15.9% and caryophyllene oxide (17.1% in June of 2009, as main components. β-Gurjunene (32.7%, in September of 2008 was the most prominent compound in the stems oils, which was absent or at very low relative abundance in leaves. L. camara essential oils from leaves were cytotoxic to V79 mammalian cells and also to Artemia salina, showing 50% lethal concentration (LC50 values from 0.23 µg/mL. The in vitro data obtained in this study suggested that EO may also be effective treating yeast infection in patients infected with fluconazole and terbinafine resistant isolates, but its toxicity must be monitored carefully.

  2. Un nuevo protocolo de medicación intraconducto para dientes con necrosis pulpar y rizogénesis incompleta

    OpenAIRE

    Soares, Adriana de Jesus; Facultad de Odontología de Piracicaba, Universidad Estatal de Campinas (FOPUNICAMP).; Lima, Thiago Farias Rocha; Facultad de Odontología de Piracicaba, Universidad Estatal de Campinas (FOPUNICAMP).; Lins, Fernanda Freitas; Facultad de Odontología de Piracicaba, Universidad Estatal de Campinas (FOPUNICAMP).; Herrera Morante, Daniel Rodrigo; Facultad de Odontología de Piracicaba, Universidad Estatal de Campinas (FOPUNICAMP).; Gomes, Brenda Paula Figueiredo de Almeida; Facultad de Odontología de Piracicaba, Universidad Estatal de Campinas (FOPUNICAMP).; Souza-Filho, Francisco José de; Facultad de Odontología de Piracicaba, Universidad Estatal de Campinas (FOPUNICAMP).

    2014-01-01

    El trauma tiene un serio impacto en el desarrollo de la dentición de niños y jóvenes, pudiendo resultar en necrosis del diente permanente joven. El tratamiento más común para los casos de necrosis pulpar en dientes con rizogénesis incompleta es promover la apexificación. Esteartículo presenta el reporte de un caso clínico donde fue utilizada una medicación intraconducto (MIC) compuesta por la asociación de hidróxido de calcio, clorhexidina gel al 2% y óxido de zinc (2:1:2) para promover la fo...

  3. 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)

  4. 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)

  5. Management of Root-Knot Disease on Tomato with Bioformulated Paecilomyces lilacinus and Leaf Extract of Lantana camara

    Directory of Open Access Journals (Sweden)

    Idorenyin Asukwo Udo

    2014-08-01

    Full Text Available Glasshouse experiments were conducted to evaluate the efficacy of application frequency of a bioformulated Paecilomyces lilacinus in combination with five concentration of Lantana camara crude aqueous leaf extract against Meloidogyne incognita race I on tomato. The experiment was a 3x5 factorial laid out in a completely randomized design (CRD with four replications. Each seedling was inoculated with 5000 eggs of M. incognita. Application of the bionematicide and L. camara leaf extract alone significantly (P≤ 0.05 inhibited root galling and egg production compared with their respective control. However, the severity of root galling and egg mass production was more significantly (P< 0.05 suppressed with the application of P. lilacinus than L. camara leaf extract. Double inoculation with P. lilacinus in combination with 0.80 g mL-1 of the L. camara leaf extract changed the susceptibility of the tomato cultivar with gall index (GI=4.00 to GI=1.50. Application of P. lilacinus twice (at transplanting and two weeks after transplanting in combination with 0.80g mL-1 of L. camara leaf extract was the most effective treatment in gall and egg mass inhibition, growth enhancement and dry matter accumulation. This environment-friendly approach could be incorporated into integrated root-knot disease management in tomato.

  6. Pathological investigation of caries and occlusal pulpar exposure in donkey cheek teeth using computerised axial tomography with histological and ultrastructural examinations.

    Science.gov (United States)

    Toit, Nicole du; Burden, Faith A; Kempson, Sue A; Dixon, Padraic M

    2008-12-01

    Post-mortem examination of 16 donkey cheek teeth (CT) with caries (both peripheral and infundibular) and pulpar exposure were performed using computerised axial tomography (CAT), histology and scanning electron microscopy. CAT imaging was found to be useful to assess the presence and extent of caries and pulp exposure in individual donkey CT. Histology identified the loss of occlusal secondary dentine, and showed pulp necrosis in teeth with pulpar exposure. Viable pulp was present more apically in one exposed pulp horn, with its occlusal aspect sealed off from the exposed aspect of the pulp horn by a false pulp stone. Scanning electron microscopy showed the amelo-cemental junction to be a possible route of bacterial infection in infundibular cemental caries. The basic pathogenesis of dental caries in donkeys appears very similar to its description in other species.

  7. Descripción de las propiedades funcionales del sistema nociceptivo trigeminal en relación con el dolor pulpar

    Directory of Open Access Journals (Sweden)

    Andrés O Pérez Ruíz

    Full Text Available El sistema trigeminal nociceptivo es un componente del sistema sensorial somestésico que tiene la capacidad de discriminar cuatro variables básicas de los estímulos que provocan daño tisular, ellas son: cualidad, curso temporal, localización e intensidad. Las fibras A delta y C, vinculadas a la nocicepción están presentes en la pulpa dental. Se utilizan varias clasificaciones del dolor, atendiendo a diversos criterios: calidad de la sensación, velocidad de transmisión por las fibras, en relación con el lugar del cuerpo donde se exprese, y a la ubicación del nociceptor. La evolución de las condiciones pulpares se clasifican como: pulpitis reversible, pulpitis transicional, pulpitis irreversible y pulpa necrótica.Según su cualidad, el dolor pulpar puede ser punzante o continuo; atendiendo a su aparición, provocado o espontáneo; por su curso, intermitente o continuo; por su localización puede ser limitado a una región, irradiado y referido; y en relación con su intensidad se considera leve, moderado o severo. La capacidad del sistema sensorial nociceptivo en cuanto a discriminar la modalidad, curso temporal, localización e intensidad del estímulo, permite conocer las diferentes etapas de un proceso inflamatorio pulpar.

  8. C15271. The Chemical Diversity of Lantana camara: Analyses of Essential Oil Samples from Cuba, Nepal, and Yemen.

    Science.gov (United States)

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

    2016-02-10

    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. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

  9. Evaluation of antimotility effect of Lantana camara L. var. acuelata constituents on neostigmine induced gastrointestinal transit in mice

    Directory of Open Access Journals (Sweden)

    Sehgal Rajesh

    2005-09-01

    Full Text Available Abstract Background Lantana camara L. (Verbenaceae, a widely growing shrub which is toxic to some animal species, has been used in the traditional medicine for treating many ailments. The purpose of the present study was to evaluate the antimotility effects of Lantana camara leaf constituents in mice intestine. Methods Evaluation of antimotility activity was done in intestine of mice treated with Lantana camara leaf powder, Lantana camara methanolic extract (LCME, lantadene A, neostigmine and neostigmine + LCME. Neostigmine was used as a promotility agent. Intestinal motility was assessed by charcoal meal test and gastrointestinal transit rate was expressed as the percentage of the distance traversed by the charcoal divided by the total length of the small intestine. The antidiarrheal effect of LCME was studied against castor oil induced diarrhea model in mice. Results The intestinal transit with LCME at a dose of 500 mg/kg was 26.46% whereas the higher dose (1 g/kg completely inhibited the transit of charcoal in normal mice. The % intestinal transit in the neostigmine pretreated groups was 24 and 11 at the same doses respectively. When the plant extracts at 125 and 250 mg/kg doses were administered intraperitonealy, there was significant reduction in fecal output compared with castor oil treated mice. At higher doses (500 and 1000 mg/kg, the fecal output was almost completely stopped. Conclusion The remarkable antimotility effect of Lantana camara methanolic extract against neostigmine as promotility agent points towards an anticholinergic effect due to Lantana camara constituents and attests to its possible utility in secretory and functional diarrheas and other gastrointestinal disorders. This effect was further confirmed by significant inhibition of castor oil induced diarrhea in mice by various doses of LCME.

  10. Evaluation of antimotility effect of Lantana camara L. var. acuelata constituents on neostigmine induced gastrointestinal transit in mice.

    Science.gov (United States)

    Sagar, Lenika; Sehgal, Rajesh; Ojha, Sudarshan

    2005-09-17

    Lantana camara L. (Verbenaceae), a widely growing shrub which is toxic to some animal species, has been used in the traditional medicine for treating many ailments. The purpose of the present study was to evaluate the antimotility effects of Lantana camara leaf constituents in mice intestine. Evaluation of antimotility activity was done in intestine of mice treated with Lantana camara leaf powder, Lantana camara methanolic extract (LCME), lantadene A, neostigmine and neostigmine + LCME. Neostigmine was used as a promotility agent. Intestinal motility was assessed by charcoal meal test and gastrointestinal transit rate was expressed as the percentage of the distance traversed by the charcoal divided by the total length of the small intestine. The antidiarrheal effect of LCME was studied against castor oil induced diarrhea model in mice. The intestinal transit with LCME at a dose of 500 mg/kg was 26.46% whereas the higher dose (1 g/kg) completely inhibited the transit of charcoal in normal mice. The % intestinal transit in the neostigmine pretreated groups was 24 and 11 at the same doses respectively. When the plant extracts at 125 and 250 mg/kg doses were administered intraperitonealy, there was significant reduction in fecal output compared with castor oil treated mice. At higher doses (500 and 1000 mg/kg), the fecal output was almost completely stopped. The remarkable antimotility effect of Lantana camara methanolic extract against neostigmine as promotility agent points towards an anticholinergic effect due to Lantana camara constituents and attests to its possible utility in secretory and functional diarrheas and other gastrointestinal disorders. This effect was further confirmed by significant inhibition of castor oil induced diarrhea in mice by various doses of LCME.

  11. 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.

  12. 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

  13. Ingestion of Lantana camara is not associated with significant effects in children.

    Science.gov (United States)

    Carstairs, Shaun D; Luk, Joyce Y; Tomaszewski, Christian A; Cantrell, F Lee

    2010-12-01

    We sought to identify characteristics of children with reported ingestion of Lantana camara. We reviewed the California Poison Control System database for all reported pediatric ingestions of L. camara for the years 1997-2008. Data collected included age, gender, clinical effects, duration of effects, medical interventions, and outcomes. There were a total of 641 patients; patient ages ranged from 1 to 16 years, with a mean of 2.5 years. Reported effects included vomiting (n = 30), abdominal pain (n = 8), agitation (n = 6), diarrhea (n = 6), throat/mouth irritation (n = 5), tachycardia (n = 4), drowsiness (n = 3), nausea (n = 2), and mydriasis (n = 1). There was no difference in frequency of symptoms between patients who ingested ripe (15.5% [95% confidence interval: 9.1%-21.8%]) versus unripe (6.0% [95% confidence interval: 0.9%-11.1%]) berries or between patients who ingested berries (10.5% [95% confidence interval: 7.3%-13.8%]) versus other plant parts (7.1% [95% confidence interval: 4.0%-10.3%]). Fifty-one patients (8%) were treated in a health care facility and 2 (0.3%) were admitted. No significant effects and no deaths were recorded. Ingestion of L. camara (including unripe berries) was not associated with significant toxicity; patients who ingested unripe berries did not exhibit more-frequent or more-severe symptoms than did patients who ingested ripe berries or other plant parts. Most patients displayed no or minimal symptoms. Children with asymptomatic ingestions and those with mild symptoms can be treated at home.

  14. Chemical composition and antibacterial activity of essential oils of Lantana camara, Ageratum houstonianum and Eupatorium adenophorum.

    Science.gov (United States)

    Kurade, Nitin P; Jaitak, Vikas; Kaul, Vijay K; Sharma, Om P

    2010-05-01

    Essential oils have applications in folk medicine, food preservation, and as feed additives. The essential oils of Lantana camara Linn. (Verbenaceae), Ageratum houstonianum Mill. (Asteraceae) and Eupatorium adenophorum Spreng. (Asteraceae) were analyzed by Gas chromatography-mass spectrometry (GCMS). In L. camara oil, of the total identified (83.91%) volatile constituents, five constituents [3,7,11-trimethyl-1,6,10-dodecatriene (28.86%), beta-caryophyllene (12.28%), zingiberene (7.63%), gamma-curcumene (7.50%) and alpha-humulene (3.99%)] represented the major ones. In A. houstonianum oil, among the total identified volatile constituents (94.51%), three [precocene-II (52.64%), precocene-I (22.45%) and beta-caryophyllene (9.66%)] represented the major ones. In E. adenophorum oil, of the total identified volatile constituents (84.95%), six [1-napthalenol (17.50%), alpha-bisabolol (9.53%), bornyl acetate (8.98%), beta-bisabolene (6.16%), germacrene-D (5.74%) and alpha- phellandrene (3.85%)] represented the major ones. The antibacterial activity expressed as Minimum Bactericidal Concentration (MBC) (microg/mL) was determined by the broth dilution method. The essential oil of E. adenophorum had antibacterial activity against Arthrobacter protophormiae, Escherichia coli, Micrococcus luteus, Rhodococcus rhodochrous, and Staphylococcus aureus with MBC values of 200, 100, 100, 12.5, and 200, respectively. The essential oil of A. houstonianum showed antibacterial activity against M. luteus and R. rhodochrous with MBC of 100 and 12.5, but not against A. protophormiae, E. coli, and S. aureus. The essential oil of L. camara showed antibacterial activity against A. protophormiae, M. luteus, R. rhodochrous and S. aureus with MBC of 50, 25, 12.5, and 200, respectively, but not against E. coli. MBC was lowest for R. rhodochrous for all the three essential oils.

  15. Quantitative risk analysis and prediction of potential distribution areas of common lantana (Lantana Camara in China

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    XiangRong Lui

    2011-04-01

    Full Text Available The ornamental hybrid shrub, Lantana camara L. (lantana, is a serious environmental weed and has been targeted for the biologist. This paper used such approaches as Analytic Hierarchy Process (AHP, fuzzy decision, etc., to analyze and predict potential distribution areas of common lantana in 147 sites of China. Based on ecological properties of common lantana, we chose 5 climate ecological factors, i.e., mean annual temperature, mean temperature from March to May in a year, elevation, days with temperature greater than 25C and annual precipitation. The results showed that common lantana will continue to spread forward north China (Hunan, Hubei, etc..

  16. 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...

  17. Adsorption of Phenol from Aqueous Solution Using Lantana camara, Forest Waste: Kinetics, Isotherm, and Thermodynamic Studies

    Science.gov (United States)

    Girish, C. R.; Ramachandra Murty, V.

    2014-01-01

    The present work investigates the potential of Lantana camara, a forest waste, as an adsorbent for the phenol reduction in wastewater. Batch studies were conducted with adsorbent treated with HCl and KOH to determine the influence of various experimental parameters such as pH, contact time, adsorbent dosage, and phenol concentration. The experimental conditions were optimized for the removal of phenol from wastewater. Equilibrium isotherms for the adsorption of phenol were analyzed by Freundlich, Langmuir, Temkin, and Dubinin-Radushkevich isotherm models. Thermodynamic parameters like the Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were also determined and they showed that the adsorption process was feasible, spontaneous, and exothermic in the temperature range of 298–328 K. The kinetic data were fitted with pseudo-second-order model. The equilibrium data that followed Langmuir model with the monolayer adsorption capacity was found to be 112.5 mg/g and 91.07 mg/g for adsorbent treated with HCl and KOH, respectively, for the concentration of phenol ranging from 25 to 250 mg/L. This indicates that the Lantana camara was a promising adsorbent for the removal of phenol from aqueous solutions. PMID:27350997

  18. Antinociceptive and anti-inflammatory effects of Lantana camara L. extract in mice

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    T.S.C. SILVA

    2015-06-01

    Full Text Available ABSTRACT:he Lantana camara L. belongs to the family Verbenaceae, which contains several active compounds in leaves and roots and which are reported to have medicinal and insecticidal properties. Studies of plants within the same family show the existence of anti-inflammatory activity in paw edema induced by carrageenan, serotonin and histamine and analgesic activity in the acetic acid writhing and tail-flick tests. The present study investigated whether the L. camara extract (ACE also exerts these effects. The ACE toxicity was studied in male mice, and the percentage of mortality recorded 7 days after treatment was assessed. The ACE was evaluated as an antinociceptive agent in the hot plate, tail-flick and acetic acid writhing tests at a nontoxic dose of 1.0 g/Kg. The results showed that 1.5 g/Kg of ACE was not able to cause death, and doses of 3.0 and 4.0 g/Kg caused 50% and 60% death, respectively, in male mice. In all of the antinociceptive tests, 1 g/Kg of ACE markedly reduced responses to pain. Our findings suggest that ACE may have active anti-inflammatory and antinociceptive properties in much smaller doses than toxic.

  19. Repellent, antifeedant, and toxic activities of Lantana camara leaf extract against Reticulitermes flavipes (Isoptera: Rhinotermitidae).

    Science.gov (United States)

    Yuan, Zhonglin; Hu, Xing Ping

    2012-12-01

    This study investigated biological activity of chloroform extract of dry Lantana camara 'Mozelle' leaves against the eastern subterranean termite, Reticulitermes flavipes (Kollar), an important structural pest. Repellent activity was assessed using a paper-disc choice test and a sand arena choice test. Antifeedant and toxic properties were assessed using a no-choice paper test and a topical application method. In the choice tests, significantly fewer termites made contact with treated paper-discs at test concentrations > or = 0.016 mg/cm2 (equivalent to 0.0023 wt:wt) or tunneled into treated sand at test concentrations > or = 0.125 mg/g, compared with control. In the no-choice tests, termite feeding activity was significantly reduced and termite mortality was greatly increased in treatments than control. Exposure to filter paper treated at 0.212 and 0.106 mg/cm2 (equivalent to 0.03 and 0.015 wt:wt) resulted in > 90% mortality and 78% reduction in feeding, and approximately 52% mortality and 40% reduction in feeding, respectively. Top-dorsal application led to > 60% mortality at 4 microg/termite. This study showed that the chloroform leaf extract of L. camara had excellent repellent and moderate toxic and antifeedant activities.

  20. Adsorption of Phenol from Aqueous Solution Using Lantana camara, Forest Waste: Kinetics, Isotherm, and Thermodynamic Studies.

    Science.gov (United States)

    Girish, C R; Ramachandra Murty, V

    2014-01-01

    The present work investigates the potential of Lantana camara, a forest waste, as an adsorbent for the phenol reduction in wastewater. Batch studies were conducted with adsorbent treated with HCl and KOH to determine the influence of various experimental parameters such as pH, contact time, adsorbent dosage, and phenol concentration. The experimental conditions were optimized for the removal of phenol from wastewater. Equilibrium isotherms for the adsorption of phenol were analyzed by Freundlich, Langmuir, Temkin, and Dubinin-Radushkevich isotherm models. Thermodynamic parameters like the Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were also determined and they showed that the adsorption process was feasible, spontaneous, and exothermic in the temperature range of 298-328 K. The kinetic data were fitted with pseudo-second-order model. The equilibrium data that followed Langmuir model with the monolayer adsorption capacity was found to be 112.5 mg/g and 91.07 mg/g for adsorbent treated with HCl and KOH, respectively, for the concentration of phenol ranging from 25 to 250 mg/L. This indicates that the Lantana camara was a promising adsorbent for the removal of phenol from aqueous solutions.

  1. Bioethanol production from Lantana camara (red sage): Pretreatment, saccharification and fermentation.

    Science.gov (United States)

    Kuhad, Ramesh Chander; Gupta, Rishi; Khasa, Yogender Pal; Singh, Ajay

    2010-11-01

    Lantanacamara contains 61.1% (w/w) holocellulose and can serve as a low-cost feedstock for bioethanol production. Acid hydrolysis (3.0%, v/v H(2)SO(4), 120 degrees C for 45 min) of L. camara produced 187.14 mg/g total sugars along with fermentation inhibitors such as phenolics (8.2mg/g), furfurals (5.1mg/g) and hydroxy methyl furfurals (6.7 mg/g). Sequential application of overliming (pH 10.0) and activated charcoal (1.5%, w/v) adsorption was used to remove these toxic compounds from the acid hydrolysate. The acid-pretreated biomass of L. camara was further delignified through combined pretreatment of sodium sulphite (5.0% w/v) and sodium chlorite (3.0% w/v), which resulted in about 87.2% lignin removal. The enzymatic hydrolysis of delignified cellulosic substrate showed 80.0% saccharification after 28 h incubation at 50 degrees C and pH 5.0. Fermentation of acid and enzymatic hydrolysates with Pichiastipitis and Saccharomycescerevisiae gave rise to 5.16 and 17.7 g/L of ethanol with corresponding yields of 0.32 and 0.48 g/g after 24 and 16 h, respectively. Copyright 2010 Elsevier Ltd. All rights reserved.

  2. 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...

  3. EFICACIA DE LA PREPARACIÓN BIOMECÁNICA DE CONDUCTOS RADICULARES EN EL CRECIMIENTO MICROBIOLÓGICO EN PIEZAS DENTARIAS ANTERIORES CON NECROSIS PULPAR EN PACIENTES DE LA CLÍNICA ODONTOLÓGICA UANCV. JULIACA, PUNO. 2013

    OpenAIRE

    TAPIA CONDORI, RILDO PAÚL

    2015-01-01

    RESULTADOS TABLAS DE INFORMACIÓN GENERAL TABLAS QUE RESPONDEN A LOS OBJETIVOS MICROBIOLOGÍA ENDODÓNTICA VÍAS MICROBIANAS DE ACCESO TÚBULOS DENTINARIOS CAVIDAD ABIERTA MEMBRANA PERIODONTAL REQUERIMIENTOS PARA UN PATÓGENO ENDODÓNTICO POTENCIAL DE OXIDO-REDUCCIÓN ANTAGÓNICOS INTERMICROBIANOS NECROSIS PULPAR TIPOS DE NECROSIS PREPARACIÓN BIOMECÁNICA EN PIEZAS CON NECROSIS PULPAR INSTRUMENTOS CONVENCIONALES DE ACERO INOXIDABLE CARACTERÍSTICAS DE LAS LIMAS K DE ACERO INOXIDABLE PROPIEDADES FÍSICAS ...

  4. Análise da atividade antimicrobiana de quatro pastas endodônticas sobre microorganismos removidos da cavidade pulpar de molares decíduos necrosados

    OpenAIRE

    Gonçalves, Sandro Seabra

    2010-01-01

    O objetivo deste estudo foi analisar "in vitro" a atividade antimicrobiana de quatro materiais (CTZ, Guedes-Pinto, Calen PMCC® e OZE) utilizados na obturação dos canais radiculares de dentes decíduos sobre alguns microorganismos removidos e identificados da cavidade pulpar de molares decíduos necrosados. Foram selecionadas 06 crianças na faixa etária de 6 a 10 anos de idade, cada uma apresentado um molar decíduo necrosado. Na fase clínica, os dentes envolvidos foram acessados e um cone de pap...

  5. Análise da atividade antimicrobiana de quatro pastas endodônticas sobre microorganismos removidos da cavidade pulpar de molares decíduos necrosados

    OpenAIRE

    Gonçalves, Sandro Seabra

    2010-01-01

    O objetivo deste estudo foi analisar “in vitro” a atividade antimicrobiana de quatro materiais (CTZ, Guedes-Pinto, Calen PMCC® dos canais radiculares de dentes decíduos sobre alguns microorganismos removidos e identificados da cavidade pulpar de molares decíduos necrosados. Foram selecionadas 06 crianças na faixa etária de 6 a 10 anos de idade, cada uma apresentado um molar decíduo necrosado. Na fase clínica, os dentes envolvidos foram acessados e um cone de papel...

  6. 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...

  7. Alternativas de medicação intracanal em casos de necrose pulpar com lesão periapical = Intracanal medication indicated for pulpal necrosis with apical osteites

    OpenAIRE

    Fachin, Elaine Vianna Freitas

    2006-01-01

    Trata-se de estudo in vivo em pacientes portadores de dentes monorradiculares apresentando necrose pulpar com lesão periapical. O objetivo foi avaliar radiograficamente a efetividade de 4 diferentes curativos de demora (PMCC, gel de clorexidina 2%, pasta de hidróxido de cálcio e hipoclorito de sódio1%). O tratamento endodôntico foi padronizado em todos os elementos através da técnica escalonada e irrigação com hipoclorito de sódio 1%. Para a medicação intracanal, os pacientes foram separados ...

  8. Negative effect of litter of invasive weed Lantana camara on structure and composition of vegetation in the lower Siwalik Hills, northern India.

    Science.gov (United States)

    Singh, Harminder Pal; Batish, Daizy R; Dogra, Kuldip Singh; Kaur, Shalinder; Kohli, Ravinder Kumar; Negi, Anjana

    2014-06-01

    Lantana camara, an aromatic shrub, native to tropical America, was introduced into India for ornamental hedging, but later escaped and became a serious invasive weed. This study assessed the quantitative and qualitative status of plant community richness and diversity in areas invaded by L. camara in the Siwalik Hills (Himachal Pradesh, India), and explored allelopathy as a possible mechanism of interference. We measured species diversity, richness and evenness of the vegetation in areas invaded and uninvaded by L. camara. Allelopathic effects of L. camara rhizosphere soil and litter were assessed against two native plants-Achyranthes aspera (a herb) and Albizia lebbeck (a tree). Density, biomass and indices of diversity, richness and evenness were reduced by L. camara, indicating a significant alteration in composition and structure of native communities. Seedling growth of the test species was reduced in L. camara rhizosphere- and litter-amended soil. The inhibitory effect was ameliorated by the addition of activated charcoal, indicating the presence of organic inhibitors (quantified as phenolics) in the soil. Lantana invasion greatly reduces the density and diversity of the vegetation in the invaded area, and chemical interference of its litter plays an important role in invasion.

  9. Acute Lantana camara poisoning in a Boer goat kid : case report

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    A. Ide

    1998-07-01

    Full Text Available Acute Lantana camara poisoning in a Boer goat kid is described. The animal was part of a flock of boer goats that was introduced from the Kalahari thornveld, where the plant does not occur, to an area where the plant grew abundantly. At necropsy, the animal was severely icteric, dehydrated and constipated, with hepatosis, distention of the gall-bladder and nephrosis, but no skin lesions. Histopathological findings of the liver confirmed moderate hepatosis with single-cell necrosis and bile stasis. The pathology is consistent with that described in acute Lantana poisoning in cattle, sheep and goats. The absence of photosensitisation may be attributed to relatively mild liver damage, or the rapid course of this toxicosis.

  10. Chemical composition and antibacterial activity of the essential oil of Lantana camara var. moritziana.

    Science.gov (United States)

    Tesch, Nurby Rios; Mora, Flor; Rojas, Luis; Díaz, Tulia; Velasco, Judith; Yánez, Carlos; Rios, Nahile; Carmona, Juan; Pasquale, Sara

    2011-07-01

    The essential oil obtained from the leaves of Lantana camara var. moritziana (Otto & Dietr.) López-Palacios collected at Rubio, Táchira State, Venezuela, was obtained by hydrodistillation in a Clevenger trap (0.1% yield). The oil was analyzed by gas chromatography-mass spectrometry (GC/MS) on HP GC-MS System, model 5973, identifying 33 compounds (97.1%) of which the major components were germacrene D (31.0%), followed by beta-caryophyllene (14.8%), a-phellandrene (6.7%), limonene (5.7%) and 1,8-cineole (5.2%). Evaluation of the antibacterial activity by agar diffusion method with discs against international reference bacteria (Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Klebsiella pneumoniae, Salmonella Typhi, Pseudomonas aeruginosa) showed growing inhibition of E. faecalis and S. aureus at MIC of 350 mg/mL and 400 mg/mL, respectively.

  11. Simultaneous saccharification and fermentation of enzyme pretreated Lantana camara using S. cerevisiae.

    Science.gov (United States)

    Kuila, Arindam; Banerjee, Rintu

    2014-10-01

    Lantana camara, an abundantly available non-edible lignocellulosic biomass has been found to be a potential feedstock for ethanol production. The substrate was first pretreated with laccase followed by simultaneous saccharification and fermentation using cellulase and Saccharomyces cerevisiae, respectively. Laccase was produced from Pleurotus sp. and carbohydratases (cellulase and xylanase) were produced from Trichoderma reesei Rut C30. Using pretreated substrate simultaneous saccharification and fermentation was optimized through central composite design-based response surface methodology. Maximum bioethanol concentration of 5.14 % (v/v) was obtained at optimum process conditions of substrate concentration 17 % (w/v), inoculum volume 9 % (v/v), inoculum age 60 and 144 h of incubation time. To enhance ethanol yield, S. cerevisiae was treated with ethyl methane sulfonate, a chemical mutagenic agent which induced mutagenesis. A maximum bioethanol concentration of 6.01 % (v/v) was obtained using the mutated strain of S. cerevisiae (CM5).

  12. Embryo sac development in some South African cultivars of Lantana camara

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    J. J. Spies

    1982-12-01

    Full Text Available Twenty embryo sacs from each of 20 different  Lantana camara L. cultivars naturalized in South Africa were examined. The normal sexual embryo sacs were monosporic 8-nucleated embryo sacs of the polygonum type and were encountered in 55% of the material examined. Several deviations from this pattern were recorded. Occasionally one of the nuclei failed to develop into a synergid, resulting in three polar nuclei. Contrary to published information, the antipodal cells did not increase in size, nor was there an increase in the number of nuclei per cell. Although the occurrence of sexuality is confirmed, no definite evidence exists for the occurrence of apomixis. The occurrence of two embryo sacs per locule might be the result of either apospory or of sexuality whereby two embryo sacs were formed from two megaspores.

  13. Coeficientes de modificação das propriedades mecânicas da madeira devidos à temperatura

    OpenAIRE

    Manríquez Figueroa, Manuel Jesús

    2012-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Civil As propriedades mecânicas da madeira à temperatura ambiente estão relacionadas, principalmente, com a densidade, a anatomia e o teor de umidade desse material. Quando ela é submetida a altas temperaturas, essas propriedades são completamente alteradas. Nessa situação, a resistência mecânica, as propriedades térmicas e a rigidez são afetadas devido à transição vítrea ...

  14. Estudos complementares sobre a toxidez de Lantana camara (Verbenaceae em bovinos

    Directory of Open Access Journals (Sweden)

    Tokarnia Carlos Hubinger

    1999-01-01

    Full Text Available Descreve-se, no município de Quatis, RJ, a ocorrência de um surto de intoxicação por Lantana camara var. aculeata em bovinos, caracterizado por acentuada icterícia, lesões de fotossensibilização, constipação e edema subcutâneo dos membros. A reprodução experimental da doença, com êxito letal, através da administração de dose única de 40 g/kg de L. camara var. aculeata, confirmou a planta como causa do surto; doses únicas de 20 g/kg, 10 g/kg e 5 g/kg causaram respectivamente, grave intoxicação, leve intoxicação e ausência de sintomas. Experimentos com doses repetidas permitem concluir que essa planta apresenta efeito acumulativo, quando ingerida em doses diárias de 10 g/kg (1/4 da dose letal; a administração de quatro doses de 5 g/kg (1/8 da dose letal ou de oito doses de 2,5 g/kg (1/16 da dose letal reproduziram o quadro grave de intoxicação. Subdoses menores, de 1,25 g/kg (1/32 da dose letal, administradas durante 34 dias, não produziram quaisquer sinais clínicos. Os exames histológicos dos casos naturais e experimentais revelaram, além de bilestase, alterações regressivas nos hepatócitos e no epitélio dos túbulos renais.

  15. Toxicity of apolar and polar Lantana camara L. crude extracts in mice.

    Science.gov (United States)

    Bevilacqua, A H V; Suffredini, I B; Romoff, P; Lago, J H G; Bernardi, M M

    2011-02-01

    Lantana camara L, widely used in folk medicine, presents toxicity for farm animals. The acute poisoning effects of the apolar and polar L. camara L. extracts in mice were done. The percentage of death during 7 days after treatment, the acute signs of toxicity as well as the general activity observed in open field were assessed. The extracts were administered by i.p. route at 1.5, 3.0 and 5.0 g/kg. Animals were evaluated during the first 2 h after the treatments to assess the acute signs of toxicity and daily observations were done for the presence of death. In the end of the experiment, at day 7, or immediately after death the animals had their organs removed, weighted and observed for macroscopic alterations. (1)H NMR and TLC analysis suggest the presence of triterpenoids in the apolar phase but not in the polar phase. Results showed also that both extracts produced similar percentage of death, mainly after 2 days of treatment; only the apolar extract presented a dose-dependent increased lethality. At necropsy, mice treated by both apolar and polar extracts were severely icteric, dehydrated and constipated, with hepatosis, showed congested heart and lung, and nephrosis; no skin lesions were shown. The main signs of toxicity revealed a decreased spontaneous general activity. In addition, it was observed a decreased duration of locomotion and animal rearing parallel to an increased immobility in the open field. The similarity of the signs related to the acute toxicity for both apolar and polar extracts suggested that the extracts have some of the active toxic principles in common. Data from open field behavior and spontaneous signs of toxicity suggest that the toxic principles have depressive properties on central nervous system. Copyright © 2010 Elsevier Ltd. All rights reserved.

  16. Acetylcholinesterase inhibition by biofumigant (Coumaran) from leaves of Lantana camara in stored grain and household insect pests.

    Science.gov (United States)

    Rajashekar, Yallappa; Raghavendra, Anjanappa; Bakthavatsalam, Nandagopal

    2014-01-01

    Recent studies proved that the biofumigants could be an alternative to chemical fumigants against stored grain insect pests. For this reason, it is necessary to understand the mode of action of biofumigants. In the present study the prospectus of utilising Lantana camara as a potent fumigant insecticide is being discussed. Inhibition of acetylcholinesterase (AChE) by Coumaran, an active ingredient extracted from the plant L. camara, was studied. The biofumigant was used as an enzyme inhibitor and acetylthiocholine iodide as a substrate along with Ellman's reagent to carry out the reactions. The in vivo inhibition was observed in both dose dependent and time dependent in case of housefly, and the nervous tissue (ganglion) and the whole insect homogenate of stored grain insect exposed to Coumaran. The possible mode of action of Coumaran as an acetylcholinesterase inhibitor is discussed.

  17. Effect of diesel exhaust pollution on cuticular and epidermal features of Lantana camara L. and Syzygium cuminii L. (Skeels. )

    Energy Technology Data Exchange (ETDEWEB)

    Kulshreshtha, K.; Farooqui, A.; Srivastava, K.; Singh, S.N.; Ahmad, K.J.; Behl, H.M. (National Botanical Research Inst., Lucknow (India))

    1994-02-01

    Cuticular and epidermal features of leaves of two common plant species namely, Lantana camara L. and Syzygium cuminii L. (Skeel.) growing in polluted and healthy (control) environments were studied under light and scanning electron microscopes. Polluted leaf samples were collected from the plants growing near a diesel generating set used in running a tube well. The study shows that in polluted populations of Lantana camara, the trichome frequency had increased four fold. In Syzygium cuminii, the stomatal openings were filled with dust and a tendency towards callus formation was also observed. The epidermal cells were comparatively thick walled and were broken at certain places. The changes observed in the cuticular and epidermal features of polluted populations of the investigated species indicate their significance as bioindicators of atmospheric pollution. 9 refs., 2 figs., 1 tab.

  18. Efficacy of some oils and chemical compounds on Insignorthezia insignis (Browne) (Hemiptera: Ortheziidae) infesting Lantana camara in Alexandria, Egypt.

    Science.gov (United States)

    Moursi, S Khadiga; Abo-Shanab, A S H; Mesbah, H A; Abdel-Razak, S I; Mourad, A K; Zaghloul, O A; Abdel-Fatah, R S

    2010-01-01

    Field and laboratory experiments were conducted in March, 2008 in El-Nouzha garden, Alexandria governorate. Pre-and post treatment inspections of the insects were examined and recorded before and after (2,4,8, and 12 weeks). Spraying was applied to evaluate the efficiency of the tested compounds, [Mineral oils (KZ oil and Star oil); IGRs (Chlorfluazuron, lufenuron and pyriproxyfen); Neem oil; emamectin benzoate and thiamethoxam]. Percentages of reduction were calculated. The ensign scale insects Insignorthezia insignis (Browne) were collected from treated Lantana camara shrubs to investigate the effect of the tested chemicals on Aspartate transferase (AST), Alanine transferase (ALT) and Alkaline-phosphatase (ALPK) of the insect enzymes activities. From the obtained results, it could be concluded that the tested materials gave good results for controlling both adult and immature stages of the ensign scale insect Insignorthezia insignis (Browne) that infested Lantana camara shrubs, through affecting enzymes activities of the assigned insect pest.

  19. Acetylcholinesterase Inhibition by Biofumigant (Coumaran from Leaves of Lantana camara in Stored Grain and Household Insect Pests

    Directory of Open Access Journals (Sweden)

    Yallappa Rajashekar

    2014-01-01

    Full Text Available Recent studies proved that the biofumigants could be an alternative to chemical fumigants against stored grain insect pests. For this reason, it is necessary to understand the mode of action of biofumigants. In the present study the prospectus of utilising Lantana camara as a potent fumigant insecticide is being discussed. Inhibition of acetylcholinesterase (AChE by Coumaran, an active ingredient extracted from the plant L. camara, was studied. The biofumigant was used as an enzyme inhibitor and acetylthiocholine iodide as a substrate along with Ellman’s reagent to carry out the reactions. The in vivo inhibition was observed in both dose dependent and time dependent in case of housefly, and the nervous tissue (ganglion and the whole insect homogenate of stored grain insect exposed to Coumaran. The possible mode of action of Coumaran as an acetylcholinesterase inhibitor is discussed.

  20. Kandungan Kimia dan Uji Antiinflamasi Ekstrak Etanol Lantana camara L. pada Tikus Putih (Rattus norvegicus L. Jantan

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    AHMAD DWI SETYAWAN

    2008-05-01

    Full Text Available Lantana camara L. is a widely distributed plant on tropics region belonging to the Family Verbenaceae. In Indonesia, the plant is used in traditional medicines of edema and rheumatisms. The aims of this research were to compare saponins, flavonoids, and essential oils constituents among the roots, the leaves, and the fruits and to know about anti-inflammatory effects of ethanolic extracts of L. camara on white male rats. The framework of the research was that the saponins, flavonoids, and essential oils constituents of L. camara have an anti-inflammatory effect. Organs with the highest constituents of saponins, flavonoids and essential oils would expect giving optimal anti-inflammatory effects. Complete Randomized Design with five treatment groups, each of the treatment had five repetitions, was used in this study. Each group have been treated: Group I CMC 0.5% control (placebo, Group II positive control (Na-diclofenac, Group III, IV and V giving ethanolic extracts of L. camara dose 720, 1080 and 1440 mg/kg BW, respectively. The inflammation was produced by sub plantar injection of carrageenan suspension in the right hind paw of the rats. The quantitative data of Area under Curve of edema percentage were analyzed statistically with SPSS program using One-Way ANOVA followed by LSD test. The results showed that the highest constituents of saponins, flavonoids, and essential oils were found in the leaves. Ethanolic extracts of L. camara’s leaves dose 720 mg/kg BW had given the highest anti- inflammatory effects (38.1%.

  1. Extraction of Lantana camara essential oil by supercritical carbon dioxide: influence of the grinding and biological activity.

    Science.gov (United States)

    Marongiu, Bruno; Piras, Alessandra; Porcedda, Silvia; Tuveri, Enrica; Deriu, Antonella; Zanetti, Stefania

    2007-01-01

    The aim of this study was to produce Lantana camara essential oil by SFE and to study the effect of matrix grinding on the yield and/or composition of the extract. Experiments were carried out on grinding matrices (G) and on not grinding matrices (NG). The extracts were analyzed by GC-MS. A comparison with the oil obtained by hydrodistillation is also given. Finally, the antibacterial and antifungal activity of the various extracts has been assayed.

  2. Clinical and immuno-proteomic approach on Lantana camara pollen allergy-a major health hazard.

    Science.gov (United States)

    Ghosal, Kavita; Saha, Bodhisattwa; Gupta Bhattacharya, Swati

    2016-01-01

    The incidence of allergic diseases is increasing gradually and is a global burden affecting the socio-economic quality of life. Identification of allergens is the first step towards paving the way for therapeutic interventions against atopic diseases. Our previous investigation figured out that total pollen load correlated significantly with the rise of respiratory allergy in a subtropical city in India. The most dominant pollen responsible for IgE sensitivity in most patients emerged to be from Lantana camara (LC) an obnoxious weed growing in and around suburban areas of West Bengal. In this study, we identified allergenic components from this shrub using an immunoproteomic approach. Determination of dominant pollen species was done using aerobiological sampling during two consecutive years and correlated with hospitalization and skin prick test. Serum was collected from LC positive patients and checked for in vitro allergenicity using ELISA and Histamine assay. Total proteome was profiled in SDS-PAGE, 2D PAGE and immunoblotted to detect IgE binding proteins which were further identified using mass spectrometry. Lantana camara pollen emerged as a significant contributor from the correlation study with hospital admission of the respiratory allergy sufferers and its extract demonstrated an elevated IgE response in ELISA and histamine release assay tests. Five IgE reactive bands/zones were observed in 1D blot which resolved to 12 allergo-reactive spots in the 2D blot. Mass spectrometric analysis identified nine spots that grouped into four diverse proteins. Pathogenesis-related Thaumatin-like protein was found to be one of the major allergens in Lantana camara. This is to our knowledge the first attempt to identify allergens from Lantana camara using a proteomic approach. The allergens identified thereof can be used to prepare hypoallergenic vaccine candidates and design immunotherapy trials against LC pollen and other aeroallergen carriers which are cross

  3. Anti-diabetic potential of ursolic acid stearoyl glucoside: a new triterpenic gycosidic ester from Lantana camara.

    Science.gov (United States)

    Kazmi, Imran; Rahman, Mahfoozur; Afzal, Muhammad; Gupta, Gaurav; Saleem, Shakir; Afzal, Obaid; Shaharyar, Md Adil; Nautiyal, Ujjwal; Ahmed, Sayeed; Anwar, Firoz

    2012-01-01

    A new stearoyl glucoside of ursolic acid, urs-12-en-3β-ol-28-oic acid 3β-D-glucopyranosyl-4'-octadecanoate and other compounds were isolated from the leaves of Lantana camara L. The structure of this new glycoside was elucidated and established by standard spectroscopic methods. In streptozotocin-induced diabetic rats it showed significant reduction in blood glucose level. Crown Copyright © 2011. Published by Elsevier B.V. All rights reserved.

  4. 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.

  5. In vitro effects of Coriandrum sativum, Tagetes minuta, Alpinia zerumbet and Lantana camara essential oils on Haemonchus contortus.

    Science.gov (United States)

    Macedo, Iara Tersia Freitas; de Oliveira, Lorena Mayana Beserra; Camurça-Vasconcelos, Ana Lourdes Fernandes; Ribeiro, Wesley Lyeverton Correia; dos Santos, Jessica Maria Leite; de Morais, Selene Maia; de Paula, Haroldo Cesar Beserra; Bevilaqua, Claudia Maria Leal

    2013-01-01

    Phytotherapy can be an alternative for the control of gastrointestinal parasites of small ruminants. This study evaluated the efficacy of Alpinia zerumbet, Coriandrum sativum, Tagetes minuta and Lantana camara essential oils by two in vitro assays on Haemonchus contortus, an egg hatch test (EHT) and larval development test (LDT). No effect was observed for L. camara in the EHT. A. zerumbet, C. sativum and T. minuta essential oils exhibited a dose-dependent effect in the EHT, inhibiting 81.2, 99 and 98.1% of H. contortus larvae hatching, respectively, at a concentration of 2.5 mg mL-1. The effective concentration to inhibit 50% (EC50) of egg hatching was 0.94, 0.63 and 0.53 mg mL-1 for A. zerumbet, C. sativum and T. minuta essential oils, respectively. In LDT, L. camara, A. zerumbet, C. sativum and T. minuta at concentration of 10 mg mL-1 inhibited 54.9, 94.2, 97.8 and 99.5% of H. contortus larval development, presenting EC50 values of 6.32, 3.88, 2.89 and 1.67 mg mL-1, respectively. Based on the promising results presented in this in vitro model, it may be possible use of these essential oils to control gastrointestinal nematodes. However, their anthelmintic activity should be confirmed in vivo.

  6. Chemical characterization of volatile compounds of Lantana camara L. and L. radula Sw. and their antifungal activity.

    Science.gov (United States)

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

    2012-09-27

    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 the attack of the phytopathogenic fungi Corynespora cassiicola. An experiment, involving C. cassiicola cultivation in culture media containing volatile oils of the two species demonstrated that the oils of L. radula were more fungistatic than the oils of L. camara, in accordance with the in vivo observations. It is likely that E-nerolidol and phytol, only found in the oil of L. radula, play a significant role in the effects of L. radula on C. cassiicola.

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

    Directory of Open Access Journals (Sweden)

    Juliana Lanna Passos

    2012-09-01

    Full Text Available 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 the attack of the phytopathogenic fungi Corynespora cassiicola. An experiment, involving C. cassiicola cultivation in culture media containing volatile oils of the two species demonstrated that the oils of L. radula were more fungistatic than the oils of L. camara, in accordance with the in vivo observations. It is likely that E-nerolidol and phytol, only found in the oil of L. radula, play a significant role in the effects of L. radula on C. cassiicola.

  8. Chemical composition and insecticidal activity of the volatile oils of leaves and flowers of Lantana camara L. cultivated in Egypt.

    Science.gov (United States)

    Abdel-Hady, Nevein M; Abdei-Halim, Azza S; Al-Ghadban, Al-Mewafy A

    2005-08-01

    GC and GC/MS analysis of the hydrodistilled volatile oils of the leaves and flowers of Lantana camara L. cv. flava (Verbenaceae) cultivated in Egypt revealed both qualitative and quantitative variations. Experimentally, twenty-nine and twenty-two components were identified in the volatile oils of leaves and flowers representing 91.91% and 95.24% of the total composition of both oils respectively. The major constituents of the leaves volatile oil were caryophyllene (9.76%), cineol (9.37%) and pinene (8.15%). The flowers volatile oils were caryophyllene (18.20%), humulene (12.22 %) and bicyclegermacrene (10.33%). Comparing the chemical composition of the volatile oils of the leaves and flowers of L. canara cv., flava from different origins, seasons and even experimental conditions revealed that there are significant qualitative and quantitative variations. The larvicidal effect of the volatile oils of L. camara cv., flava leaves and flowers of was tested against the maturation of Musca domestica L. larvae in the laboratory at concentrations (0.0125%, 0.025%. 0.05%, 0.1% and 0.2%). They showed mortality rate ranged from 80%- 100%. On the other hand, 10-20% of the developed pupae emerged to adults. Adults' fecundity was in larvae given a concentration of 0.0125%. In conclusion, the volatile oils of the leaves and flowers of L. camara cv., flava can be safely recommended in controlling M. domestica 3rd stage larvae.

  9. Evaluation of the anti-diarrheal activity of the aqueous stem extract of Lantana camara Linn (Verbenaceae) in mice.

    Science.gov (United States)

    Tadesse, Edlam; Engidawork, Ephrem; Nedi, Teshome; Mengistu, Getnet

    2017-04-04

    Diarrheal disease remains a public health problem in developing countries, including Ethiopia. In order to alleviate this disease, Ethiopian traditional healers use a wide range of medicinal plants from which Lantana camara is one of them. The stem of this plant is traditionally used for the treatment of diarrhoea. In addition, this plant is scientifically evaluated to have an antispasmodic effect on in vitro study. The aim of this study was to evaluate the antidiarrheal activity of the aqueous stem extract of L. camara Linn in mice. The antidiarrheal activity of the extract was investigated using castor oil induced diarrhoea, enteropooling and small intestine transit models. The test groups received various doses (100, 200, and 400 mg/kg) of the extract, whereas positive controls received Loperamide (3 mg/kg) and negative controls received distilled water (10 ml/kg). In castor oil induced diarrhoea model, the extract, at all test doses, significantly (p camara, thus provide the scientific basis for the traditional uses of this plant as a treatment for diarrhoea.

  10. Transplantes dentários : alterações pulpares e das superfícies radiculares

    OpenAIRE

    Ferreira, Manuel Marques

    2009-01-01

    Tese de doutoramento em Medicina Dentária (Dentisteria Operatória- Endodoncia) apresentada à Fac. Medicina da Univ. Coimbra A ausência de dentes perdidos por cárie, por traumatismo ou devido a agenesias, tem como sequelas a alteração da integridade do sistema estomatognático, com repercussão a nível estético, funcional, social e psicológico. Existem diversas possibilidades clínicas para substituir os dentes ausentes, tais como, a prótese parcial removível, a prótese fixa e os implantes ora...

  11. 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.

  12. Biomagnetic monitoring of particulate matter (PM through leaves of an invasive alien plant Lantana camara in an Indo-Burma hot spot region

    Directory of Open Access Journals (Sweden)

    Prabhat Kumar Rai

    2016-03-01

    Full Text Available Present study was performed in urban forests of Aizawl, Mizoram, North East India falling under an Indo-Burma hot spot region of existing ecological relevance and pristine environment. Phyto-sociolology of invasive weeds has been performed and results revealed that Lantana camara was the most dominant invasive weed. Further, the air quality studies revealed high suspended particulate matter (SPM as well as respirable suspended particulate matter (RSPM in ambient air of Aizawl, Mizoram, North East India. Bio-magnetic monitoring through plant leaves has been recognised as recent thrust area in the field of particulate matter (PM science. We aimed to investigate that whether magnetic properties of Lantana camara leaves may act as proxy of PM pollution and hence an attempt towards it's sustainable management. Magnetic susceptibility (χ, Anhyste reticremanent magnetization (ARM and Saturation isothermal remanent magnetization (SIRM of Lantana camara plant leaves were assessed and concomitantly correlated these magnetic properties with ambient PM in order to screen this invasive plant which may act as proxy for ambient PM concentrations. Results revealed high χ, ARM, SIRM of Lantana camara leaves and moreover, these parameters were having significant and positive correlation with ambient SPM as well as RSPM. Therefore, present study recommended the use of Lantana camara as bio-magnetic monitor which may further have sustainable management implications of an invasive plant.

  13. Evaluation of antioxidant activity and total phenol in different varieties of Lantana camara leaves.

    Science.gov (United States)

    Kumar, Sanjiv; Sandhir, Rajat; Ojha, Sudarshan

    2014-08-22

    Phytochemicals like carotenoids, tocopherols, ascorbates and phenols present in the plants are strong antioxidants and have an important role in the health care system. There is growing interest in correlating the phytochemical constituents of a plant with its pharmacological activity. Therefore, the present study investigates the content of total phenolics, flavonoids and the antioxidant activity of four different varieties of Lantana camara L. (Verbenaceae) leaves by using in vitro antioxidant models. The leaves of Chandigarh purple variety (CPV), Palampur red variety (PRV), Chandigarh yellow turning pink variety (YTPV) and Chandigarh yellow variety (CYV) Lantana camara were collected and the total phenolic, flavonoid content, antioxidant and free radical scavenging activities were determined in their methanolic extracts. The phenolic content was found to be highest in the CYV extract (232.99 ± 15.97 mg GAE/ g extract). The content of the flavonoids are in the order of YTPV, PRV, CPV and CYV. The IC50 values for the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging test were in the order of CYV (33.30 ± 2.39) total antioxidant capacity was observed in CYV (222.20 ± 5.05 mg AAE/ g). The Ferric ion reducing antioxidant potential (FRAP) value of the extracts were in the order of CYV > PRV > YTPV > CPV. The IC50 values of 2, 2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS) scavenging assay for CYV, PRV, YTPV, CPV were 18.25 ± 0.19, 18.24 ± 1.82, 50.43 ± 9.49, 52.84 ± 1.82 μg/mL respectively. PRV extract showed the maximum in vitro lipid peroxidation inhibition effect with an IC50 value of 68.50 μg/mL which is even stronger as compared to the standard Rutin (79.69 μg/mL). The extracts showed a strong correlation between the phenolic content and their antioxidant activities. The highest correlation (r = 0.998, R2 = 0.997) was found between total phenolic content and ABTS scavenging assay. Among

  14. Aplicação de princípios de engenharia tecidual no estudo da diferenciação de células-tronco pulpares

    OpenAIRE

    Luciano Casagrande

    2008-01-01

    O presente estudo utilizou o modelo fatia-dental/matriz-polimérica para avaliar a influência do tratamento dentinário e das BMPs dentinárias na diferenciação das células-tronco da polpa de dentes decíduos (SHED). Secções transversais (1mm) foram preparadas a partir de terceiros molares humanos extraídos. Matrizes poliméricas a base de ácido poli-L-lático (PLLA) foram criadas no interior da cavidade pulpar das secções dentinárias, tratadas com solução de EDTA a 10%; NaOCl a 5.25%; ou permanece...

  15. Treatment of bovine dermatophilosis with Senna alata, Lantana camara and Mitracarpus scaber leaf extracts.

    Science.gov (United States)

    Ali-Emmanuel, N; Moudachirou, M; Akakpo, J A; Quetin-Leclercq, J

    2003-06-01

    This study describes interesting preliminary results on the therapeutic effects of ointments prepared with extracts of medicinal plants on bovine dermatophilosis. Our results show that the use of ointments made with ethanolic extracts of leaves of Senna alata, Lantana camara and Mitracarpus scaber, as topical treatments on chronic crusty or acute lesions of dermatophilosis, induces healing of the disease in the nine infected animals treated without recurrence. This is opposed to what is observed by using oxytetracycline, terramycin long-acting (TLA), or procaine-penicillin, antibiotics commonly used parenterally for the treatment of dermatophilosis in the Republic of Benin which could not prevent the recurrence of the disease. These ointments, when applied once a day for 8-15 days, provoked the falling off of the crusts after 3-4 days of treatment. Hair grows on the treated areas, which heal without scarring, within 3-4 weeks after the end of the treatment. The healed animals became free of dermatophilosis without recurrence for more than 3 years and were in good health.

  16. Phytochemical analysis and modulation in aminoglycosides antibiotics activity by Lantana camara L.

    Directory of Open Access Journals (Sweden)

    Erlânio Oliveira de Sousa

    2015-08-01

    Full Text Available Several plants have been evaluated not only for alone antimicrobial activity, but as resistance-modifying agent. This work is the first on the modulation of antibiotic activity by Lantana camara L. extracts against multiresistant strains of Escherichia coli and Staphylococcus aureus. The antibacterial activities of leaf and root ethanol extracts alone or in association with aminoglycosides were determined against bacterial strains by a microdilution test. The minimum inhibitory concentration (MIC of the extracts was compared with of the aminoglycosides. Phytochemical prospection revealed the presence of quinones, steroids, flavonoids, saponins, tannins, triterpenoids and alkaloids. The results showed antibacterial activities of the extracts and synergistic effects combined with aminoglycosides. The most expressive effects were obtained with root extract but gentamicin or but neomycin against E. coli with MICs decreased (312 to 5 µg mL-1. The data from this study are indicative of the antibacterial activity of L. camara’s extracts and its potential in modifying the resistance of aminoglycosides analyzed.

  17. Pentacyclic triterpenoids from the aerial parts of Lantana camara and their nematicidal activity.

    Science.gov (United States)

    Begum, Sabira; Zehra, Syeda Qamar; Siddiqui, Bina Shaheen; Fayyaz, Shahina; Ramzan, Musarrat

    2008-09-01

    Two new olean-12-ene triterpenoids, camarolic acid (1) and lantrigloylic acid (2), have been isolated from the aerial parts of Lantana camara, along with ten known triterpenes, namely, camaric acid, lantanolic acid, lantanilic acid, pomolic acid, camarinic acid, lantoic acid, camarin, lantacin, camarinin, and ursolic acid. The new compounds have been characterized as 3,25-epoxy-3alpha-hydroxy-22beta-{[(S)-3-hydroxy-2-methylidenebutanoyl]oxy}olean-12-en-28-oic acid (1) and 3,25-epoxy-3alpha-hydroxy-22beta-[(3-methylbut-2-enoyl)oxy]olea-9(11),12-dien-28-oic acid (2) through spectroscopic studies and a chemical transformation. Seven of the constituents, namely pomolic acid, lantanolic acid, lantoic acid, camarin, lantacin, camarinin, and ursolic acid, were tested for nematicidal activity against root-knot nematode Meloidogyne incognita. Pomolic acid, lantanolic acid, and lantoic acid showed 100% mortality at 1 mg/ml concentration after 24 h, while camarin, lantacin, camarinin, and ursolic acid exhibited 100% mortality at this concentration after 48 h. These results are comparable to those obtained with the conventional nematicide furadan (100% mortality at 1 mg/ml concentration after 24 h).

  18. Effect of culture conditions on synthesis of triterpenoids in suspension cultures of Lantana camara L.

    Science.gov (United States)

    Srivastava, Priyanka; Sisodia, Vikash; Chaturvedi, Rakhi

    2011-01-01

    Present report is aimed to study the batch kinetics of Lantana camara. Dynamic changes of parameters, such as pH, conductivity, wet and dry cell concentrations, consumption of major nutrients, carbon source and agitation speeds were investigated to understand the culture characteristics of suspended cells grown on MS + BAP + 2,4-D + NAA in shake flasks. Results indicated that the consumption of phosphate resulted in the onset of stationary phase in cultures. Maltose as carbon source resulted in production of maximum triterpenoid content (31.08 mg/L) while the least was found on glucose (10.69 mg/L). Notably, both did not support accumulation of betulinic acid. Sucrose, although stood second in terms of quantity (21.6 mg/L), supported the production of all the three triterpenoids-oleanolic, ursolic and betulinic acids. Maximum viable cultures were obtained at a rotation speed of 120 rpm. The present finding will form a background for further scale-up related studies.

  19. Genetic diversity and population structure of Lantana camara in India indicates multiple introductions and gene flow.

    Science.gov (United States)

    Ray, A; Quader, S

    2014-05-01

    Lantana camara is a highly invasive plant, which has spread over 60 countries and island groups of Asia, Africa and Australia. In India, it was introduced in the early nineteenth century, since when it has expanded and gradually established itself in almost every available ecosystem. We investigated the genetic diversity and population structure of this plant in India in order to understand its introduction, subsequent range expansion and gene flow. A total of 179 individuals were sequenced at three chloroplast loci and 218 individuals were genotyped for six nuclear microsatellites. Both chloroplasts (nine haplotypes) and microsatellites (83 alleles) showed high genetic diversity. Besides, each type of marker confirmed the presence of private polymorphism. We uncovered low to medium population structure in both markers, and found a faint signal of isolation by distance with microsatellites. Bayesian clustering analyses revealed multiple divergent genetic clusters. Taken together, these findings (i.e. high genetic diversity with private alleles and multiple genetic clusters) suggest that Lantana was introduced multiple times and gradually underwent spatial expansion with recurrent gene flow. © 2013 German Botanical Society and The Royal Botanical Society of the Netherlands.

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

    Science.gov (United States)

    Taylor, Subhashni; Kumar, Lalit

    2012-01-01

    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.

  1. Valorization of Toxic Weed Lantana camara L. Biomass for Adsorptive Removal of Lead

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    Vipin Kumar Saini

    2017-01-01

    Full Text Available Valorization of Lantana camara L., which is a recognized invasive plant, as a potential source of activated carbon is proposed in this study. Its stem and leaf have been utilized for the preparation of activated carbon (ACL and ACS by following acid-impregnation technique, followed by thermal treatment. The developed activated carbon samples were characterized for their structural and surface related properties by low-temperature nitrogen adsorption isotherm, SEM techniques, and pHPZC method. The samples show reasonable high surface area and pore volume; nonetheless, these properties are higher in case of ACL as compraed to ACS. Both of these samples developed negative charge on their surface due to acid treatment that resulted in an increase in adsorption at pH > 5. The batch adsorption studies on these samples shows the Pb(II ion adsorption capacities of ACL and ACS were 36.01 and 32.24 mg·g−1, respectively, at 25°C. The kinetics of adsorption with both the sample systems follow the pseudo-second-order model, whereas the experimental equilibrium isotherm data of ACL and ACS were explained by Freundlich and Langmuir models, respectively. For these samples, the HCl shows maximum desorption with which the recycling test on these samples shows that ACS has better recycling potential over ACL samples.

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

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    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.

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

    Science.gov (United States)

    Ramaswami, Geetha; Sukumar, Raman

    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.

  4. Micropropagation and callus induction of Lantana camara L. – A medicinal plant

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    Varaporn Veraplakorn

    2016-09-01

    Full Text Available Lantana camara L., a medicinal plant, exhibits antimicrobial, fungicidal, insecticidal and nematicidal properties. Effective in vitro micropropagation and callus induction aid plant material production for bioactive compound studies and plant resource conservation. Shoot multiplication, root induction and callus formation were investigated. The results indicated a high shoot multiplication rate on Murashige and Skoog (MS medium supplemented with 16.0 μmol/L N6-benzyladenine (BA. Shoots showed good root regeneration with healthy plantlets on MS medium supplemented with 7.5 μmol/L indole-3-butyric acid. A large callus size occurred with roots at the basal end of shoots on the media added with 20.0 μmol/L or 40.0 μmol/L of 1-naphthalene acetic acid (NAA combined with 40.0 μmol/L BA. Leaf explants were more suitable for callus induction. Media containing 0.0–40.0 μmol/L BA in combination with 20.0 μmol/L or 40.0 μmol/L NAA could efficiently induce callus formation with the same level of relative growth rate. These plants and callus will be suitable sources of plant material for further study in producing bioactive compounds.

  5. Efectividad clínica y radiográfica de dos pastas antibióticas empleadas en necrosis pulpar en niños de un hospital nacional del Perú

    OpenAIRE

    Calixto Chanca, Katherin Sherly; Correa Olaya, Eufemia; Anchelia Ramírez, Shilla

    2014-01-01

    Objetivo. Determinar la efectividad clínica y radiográfica de la pasta CTZ comparada con la Guedes Pinto modificada (GPM) empleadas en necrosis pulpar en niños de 3 a 6 años de edad del Servicio de Odontopediatría del Hospital Nacional Hipólito Unánue. Materiales y métodos. Estudio experimental, longitudinal y prospectivo. Se evaluó a 48 niños de 3 a 6 años, obteniéndose 56 piezas dentarias deciduas con diagnóstico de necrosis pulpar. Se les realizó el tratamiento de pulpectomía y se...

  6. Evaluation of traumatized immature teeth treated with two pulp revascularization proposals = : Avaliação de dentes traumatizados com rizogênese incompleta submetidos a duas propostas de revascularização pulpar

    OpenAIRE

    Juliana Yuri Nagata

    2013-01-01

    Resumo: O presente trabalho teve como objetivos: avaliar os resultados clínicos e radiográficos da utilização da pasta tripla antibiótica e do hidróxido de cálcio associado à clorexidina gel 2% para a revascularização pulpar (capítulo 1); avaliar a redução microbiana da descontaminação realizada com pasta tripla antibiótica e à base de hidróxido de cálcio e clorexidina gel 2% na revascularização pulpar, e identificar espécies microbianas por Reação em Cadeia da Polimerase (PCR) (capítulo 2); ...

  7. In vitro activity of Lantana camara, Alpinia zerumbet, Mentha villosa and Tagetes minuta decoctions on Haemonchus contortus eggs and larvae.

    Science.gov (United States)

    Macedo, Iara T F; Bevilaqua, Claudia M L; de Oliveira, Lorena M B; Camurça-Vasconcelos, Ana L F; Morais, Selene M; Machado, Lyeghyna K A; Ribeiro, Wesley L C

    2012-12-21

    The resistance of gastrointestinal nematodes to anthelmintics has increased the need to evaluate natural products that can replace or assist current strategies to control gastrointestinal nematodes. The objective of this study was to evaluate the effect of decoctions of Lantana camara (DLc), Alpinia zerumbet (DAz), Mentha villosa (DMv) and Tagetes minuta (DTm) on Haemonchus contortus by two in vitro tests. The effects of increasing concentrations of lyophilized decoctions (0.31 to 10mg/ml) were assessed using the egg hatch test (EHT). The decoctions were then tested in the larval artificial exsheathment assay. H. contortus third stage larvae (L3) were exposed to 0.31 mg/ml A. zerumbet and M. villosa decoctions and 0.62 mg/ml T. minuta and L. camara decoctions for 3h and then exsheathment procedure at 10 min intervals. An inhibitor of tannins, polyvinyl polypyrrolidone (PVPP), was used to study if tannins were responsible for the inhibitory effect on hatching and exsheathment of larvae. A. zerumbet, M. villosa and T. minuta showed a dose-dependent effect in the EHT, which did not disappear after the addition of PVPP. No effect was observed for L. camara in the EHT. However, the decoctions inhibited the process of larval exsheathment, which may be related to tannin action because the addition of PVPP reversed the inhibitory effect. A. zerumbet, M. villosa and T. minuta decoctions showed inhibitory activity on H. contortus larvae hatching and exsheathing. The decoctions of these plants could be used to control gastrointestinal nematodes following confirmation of their anthelmintic activity in vivo. Copyright © 2012 Elsevier B.V. All rights reserved.

  8. Chemical Composition of Essential Oil of Lantana camara L. (Verbenaceae and Synergistic Effect of the Aminoglycosides Gentamicin and Amikacin

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    Erlânio O. Sousa

    2012-01-01

    Full Text Available The leaves of Lantana camara L. (Verbenaceae were subjected to hydrodistillation, and the essential oil extracted was examined with respect to chemical composition, antibacterial and antibiotic modifying activity by gaseous contact. Among the 25 identified components, bicyclogermacrene (26.1%, β-caryophyllene (24.4%, germacrene D (19.2% and valecene (12.0% were the main constituents. The essential oil volatile constituents inhibited the growth of Staphylococcus aureus and Pseudomonas aeruginosa with MIC of 1 and > 1 mg/L, respectively. The activity of the antibiotic amikacin was increased by 65% against S. aureus and P. aeruginosa after contact with the volatile components.

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

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    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.

  10. Host-plant variety and not climate determines the establishment and performance of Aceria lantanae (Eriophyidae), a biological control agent of Lantana camara in South Africa.

    Science.gov (United States)

    Mukwevho, Ludzula; Simelane, David; Olckers, Terence

    2017-02-01

    The flower-galling mite Aceria lantanae (Cook) (Trombidiformes: Eriophyidae) was released for the biological control of Lantana camara L. (Verbenaceae) in South Africa in 2007, but has displayed variable and patchy establishment throughout the weed's range. Surveys were undertaken in 2013-2014, both seasonally and during the mite's peak infestation periods, to determine the influence of climatic factors on its performance. Although there were seasonal differences in the percentages of mite-infested inflorescences, these did not differ significantly between altitudinal zones. There were also no significant relationships between the percentages of mite-infested inflorescences and either of annual rainfall, temperature or relative humidity. A field inoculation trial revealed significant differences between 10 common South African L. camara varieties in their susceptibility to A. lantanae. Only three varieties displayed appreciable susceptibility (50-61% of inflorescences infested), whereas six displayed only slight to moderate susceptibility (8-21%) and one displayed a lack of susceptibility (no infestation). These data support the contention that differential varietal susceptibility and not climate is responsible for the variable performance of A. lantanae on L. camara in South Africa. Complementing the current biotype of A. lantanae, originally sourced from Florida (USA), with other biotypes from different L. camara genotypes in Central and South America could increase the mite's impact on the weed.

  11. Leaves of Lantana camara Linn. (Verbenaceae) as a potential insecticide for the management of three species of stored grain insect pests.

    Science.gov (United States)

    Rajashekar, Y; Ravindra, K V; Bakthavatsalam, N

    2014-11-01

    Insects cause extensive damage to stored grains and their value added products. Among the stored grain pests Sitophilus oryzae (L.) Callosobruchus chinensis (Fab.) and Tribolium castaneum (Herbst.) are considered as destructive pests in India. Plants may provide alternatives to currently used insect control agents as they constitute rich source in bioactive molecules. Lantana camara, an erect shrub, which grows widely in the tropics, exhibits insecticidal activity against several insects. The methanol extract from leaves of L. camara has fumigant and contact toxicity against S. oryzae, C. chinesis and T. castaneum. In fumigant assays, The LC50 for S. oryzae was 128 μl/L(1), C. chinensis 130.3 μl/L(1), and T. castaneum 178.7 μl/L(1). The LD50 values for S. oryzae C. chinensis and T. castaneum in contact toxicity were 0.158, 0.140 and 0.208 mg/cm(2), respectively. For grain treatment, a concentration of 500 mg/L(1) and 7 days exposure were needed to obtain 90 - 100 % population extinction in all three insects. Probit analysis showed that C. chinensis were more susceptible than S. oryzae and T. castaneum. Gaschromatography-Mass Spectrometer (GCMS) studies for extracts indicated the presence of potent fumigant molecules in L. camara. The prospect of utilizing L. camara as potent fumigant insecticide is discussed.

  12. Kibdelosporangium lantanae sp. nov., isolated from the rhizosphere soil of an ornamental plant, Lantana camara L.

    Science.gov (United States)

    Li, Dan; Huang, Yaojian; Song, Siyang; Xue, Ci; Wu, Yingying; Deng, Xianming

    2015-08-01

    Strain XMU 506T, isolated from the rhizosphere soil of an ornamental plant, Lantana camara L., collected from Xiamen City, China, was identified using a polyphasic approach to clarify its taxonomic position. The aerial mycelium of this organism formed long straight or curved chains of spores and sporangium-like structures. The optimum growth occurred at 28-30 °C, pH 7.0 with 0-1% NaCl. Strain XMU 506T showed the highest 16S rRNA gene sequence similarity (96.5%) to Kibdelosporangium philippinense DSM 44226T, and formed a monophyletic clade in the 16S rRNA gene phylogenetic tree together with the type strains of the genus Kibdelosporangium. The chemotaxonomic properties further supported the assignment of strain XMU 506T to the genus Kibdelosporangium: meso-diaminopimelic acid was the diagnostic amino acid in the cell wall peptidoglycan; mycolic acids were not present in the cell wall; the whole-cell hydrolysates contained arabinose, galactose, glucose and ribose. The major menaquinone was MK-9(H4); the phospholipids of the isolate comprised phosphatidylethanolamine, OH-phosphatidylethanolamine, diphosphatidylglycerol and unidentified amino-, glyco- and phospholipids; the major fatty acids of the strain were iso-C16 : 0, C17 : 1 ω6c and iso-C16 : 1 H. The G+C content of genomic DNA was 67.3 mol%. Based on the results of phylogenetic analysis, phenotypic and genotypic characterization, strain XMU 506T represents a novel species in the genus Kibdelosporangium, for which the name Kibdelosporangium lantanae sp. nov. is proposed. The type strain is XMU 506T ( = KCTC 29675T = MCCC 1K00430T).

  13. In vitro effects of Coriandrum sativum, Tagetes minuta, Alpinia zerumbet and Lantana camara essential oils on Haemonchus contortus

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    Iara Tersia Freitas Macedo

    Full Text Available Phytotherapy can be an alternative for the control of gastrointestinal parasites of small ruminants. This study evaluated the efficacy of Alpinia zerumbet, Coriandrum sativum, Tagetes minuta and Lantana camaraessential oils by two in vitro assays on Haemonchus contortus, an egg hatch test (EHT and larval development test (LDT. No effect was observed for L. camara in the EHT. A. zerumbet, C. sativum and T. minuta essential oils exhibited a dose-dependent effect in the EHT, inhibiting 81.2, 99 and 98.1% of H. contortus larvae hatching, respectively, at a concentration of 2.5 mg mL-1. The effective concentration to inhibit 50% (EC50 of egg hatching was 0.94, 0.63 and 0.53 mg mL-1 for A. zerumbet, C. sativum and T. minuta essential oils, respectively. In LDT, L. camara, A. zerumbet, C. sativum and T. minuta at concentration of 10 mg mL-1 inhibited 54.9, 94.2, 97.8 and 99.5% of H. contortus larval development, presenting EC50 values of 6.32, 3.88, 2.89 and 1.67 mg mL-1, respectively. Based on the promising results presented in this in vitro model, it may be possible use of these essential oils to control gastrointestinal nematodes. However, their anthelmintic activity should be confirmed in vivo.

  14. Anti-inflammatory and anticancer compounds isolated from Ventilago madraspatana Gaertn., Rubia cordifolia Linn. and Lantana camara Linn.

    Science.gov (United States)

    Ghosh, Subhalakshmi; Das Sarma, Madhushree; Patra, Amarendra; Hazra, Banasri

    2010-09-01

    The aim was to search for anti-inflammatory and anticancer compounds from three medicinal plants, viz. Ventilago madraspatana Gaertn., Rubia cordifolia Linn. and Lantana camara Linn. The NO* scavenging potential of selected plant extracts was determined on LPS/IFN-gamma activated murine peritoneal macrophage cultures, and iNOS and COX-2 expression was evaluated by Western blot analysis. Bio-assay guided fractionation yielded four compounds: physcion and emodin from V. madraspatana, 1-hydroxytectoquinone from R. cordifolia, and oleanonic acid from L. camara. The anti-inflammatory activity of these compounds was tested through the carrageenan-induced rat-paw oedema model. They were then tested against a murine tumour (Ehrlich ascites carcinoma), and three human cancer cell lines, namely A375 (malignant skin melanoma), Hep2 (epidermoid laryngeal carcinoma) and U937 (lymphoma). All four compounds dose dependently inhibited NO* through suppression of iNOS protein without affecting macrophage viability. Physcion and emodin caused 65-68% reduction of oedema volume at 40 mg/kg, which validated their in-vivo anti-inflammatory effect. 1-Hydroxytectoquinone and oleanonic acid exhibited promising cytotoxicity against A375 cells. Ethnomedical reports on these traditional medicinal plants have been rationalised through an insight into the anti-inflammatory as well as anticancer potential of four constituents, characterised to be prospective candidates for designing novel therapeutic agents.

  15. Characterization of leaves and flowers volatile constituents of Lantana camara growing in central region of Saudi Ar

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    Merajuddin Khan

    2016-11-01

    Full Text Available The chemical components of essential oils derived from leaves and flowers of Lantana camara growing in Saudi Arabia are analyzed for the first time using gas chromatography techniques (GC–MS, GC–FID, Co-GC, LRI determination, and database and literature searches on two different stationary phase columns (polar and nonpolar. This analysis led to the identification of total 163 compounds from leaves and flowers oils. 134 compounds were identified in the oil obtained from leaves of L. camara, whereas 127 compounds were identified in the oil obtained from flowers; these compounds account for 96.3% and 95.3% of the oil composition, respectively. The major components in the oil from leaves were cis-3-hexen-1-ol (11.3%, 1-octen-3-ol (8.7%, spathulenol (8.6%, caryophyllene oxide (7.5% and 1-hexanol (5.8%. In contrast, the major compounds in the flowers oil were caryophyllene oxide (10.6%, β-caryophyllene (9.7%, spathulenol (8.6%, γ-cadinene (5.6% and trans-β-farnesene (5.0%. To the best of our knowledge, cis-3-hexen-1-ol and 1-octen-3-ol that were identified as major components in this study have not been reported earlier from Lantana oils.

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

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    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. Antibacterial Activity of Lantana camara Linn and Lantana montevidensis Brig Extracts from Cariri-Ceará, Brazil.

    Science.gov (United States)

    Barreto, Fs; Sousa, Eo; Campos, Ar; Costa, Jgm; Rodrigues, Ffg

    2010-01-01

    The use of medicinal plants with therapeutics properties represents a secular tradition in different cultures, mainly in underdeveloped countries. Lantana camara Linn and Lantana montevidensis Briq (Verbenaceae) found in tropical and subtropical areas around the world are popularly known as "camará" or "chumbinho." In popular medicines, both plants are used as antipyretic and carminative and in the treatment of respiratory system infections. In this study, the antibacterial activity of the ethanolic extracts of L. camara and L. montevidensis leaves and roots against gram-positive and gram-negative strains standard and multi-resistant bacteria isolated from clinical material are presented. In order to determine the minimal inhibitory concentration (MIC), the microdilution method was used. The extracts demonstrated antibacterial activity against all tested bacteria, but the L. montevidensis fresh leaves extract present the best result against P. aeruginosa (MIC 8 μg/mL) and against multi-resistant E. coli (Ec 27) (MIC 16 μg/mL). These results drive new researches with both species in order to isolate the constituents responsible for the activity.

  18. Lantana camara invasion in urban forests of an Indo–Burma hotspot region and its ecosustainable management implication through biomonitoring of particulate matter

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    Prabhat Kumar Rai

    2015-12-01

    Full Text Available The present study was performed in urban forests of Aizawl, Mizoram, north east India falling under an Indo–Burma hot spot region of existing ecological relevance and pristine environment. The phytosociolology of invasive weeds has been studied, showing that Lantana camara was the most dominant invasive weed. Further, the air quality studies revealed high suspended particulate matter as well as respirable suspended particulate matter in the ambient air of Aizawl. Biomonitoring through plant leaves has been recognized as a recent thrust area in the field of particulate matter science. We aimed to investigate whether L. camara leaves may act as a biomonitoring tool hence allowing its sustainable management. The quantity of respirable suspended particulate matter and suspended particulate matter at four different sites were much higher than the prescribed limits of Central Pollution Control Board of India during the summer and winter seasons. The dust deposition of L. camara leaves was 1.01 mg/cm2 and, pertaining to the biochemical parameters: pH was 7.49; relative water content 73.74%; total chlorophyll 1.91 mg/g; ascorbic acid 7.06 mg/g; sugar 0.16 mg/g; protein 0.67 mg/g; catalase 30.76 U/mg protein; peroxidase 0.16 U/mg protein; and air pollution tolerance index was 12.91. L. camara was observed in the good category in anticipated performance index, which shows the tolerant and conditioning capacity of air pollution. Therefore, the present study recommends the use of L. camara as biomonitor that may further have sustainable management implications for an invasive plant.

  19. An anatomical study to evaluate the risk of pulpar exposure during mechanical widening of equine cheek teeth diastemata and 'bit seating'.

    Science.gov (United States)

    Bettiol, N; Dixon, P M

    2011-03-01

    Cheek teeth (CT) diastemata are a major equine dental disorder that can be treated by mechanically widening the diastemata. There is limited anatomical knowledge of the spatial relationships of the individual pulps to the adjacent interproximal surfaces; on the risks of exposing the 6th pulp horn when performing the clinically unproven 'bit seating' procedure on Triadan 06s. To describe the anatomical relationships between the occlusal and interproximal surfaces of CT and the adjacent pulp horns; and between the 6th pulp horn and the occlusal and rostral surfaces of Triadan 06s. The CT from 30 skulls of horses subjected to euthanasia for non-dental reasons were sectioned to expose the rostrally and caudally situated pulp horns to allow the anatomical relationships between the pulp horns and the occlusal and interproximal aspects of the CT to be assessed. Pulp horns were mean ± s.d. of 5.74 ± 1.45 (range 1.3-10.8 mm) from the nearest interproximal surface, with 5.3% of pulp horns being <3.5 mm from the interproximal surface. In contrast to expectations, pulps tended to became closer to the interproximal surface (and also to the occlusal surface) with increasing age. Teeth with physiologically tall clinical crowns, and also those in the Triadan 09 position had pulps that were closer to the interproximal surfaces than the remaining CT. The more caudally situated pulp horns, i.e. in particular, the 4th maxillary and 5th mandibular pulp horns were closer to the interproximal surfaces than the remaining pulp horns and these pulp horns also had the thinnest sub-occlusal secondary dentine. Pulps that were close to the interproximal surface were also found to be close to the occlusal surface of the CT. While diastema widening is theoretically safe between the majority of CT, a small proportion of pulp horns are only 1.3 mm from an interproximal surface and others lie just 1.6 mm beneath the occlusal surface, and such pulps are at risk of pulpar exposure and to thermal

  20. 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.

  1. Alternativas de medicação intracanal em casos de necrose pulpar com lesão periapical = Intracanal medication indicated for pulpal necrosis with apical osteites

    Directory of Open Access Journals (Sweden)

    Fachin, Elaine Vianna Freitas

    2006-01-01

    Full Text Available Trata-se de estudo in vivo em pacientes portadores de dentes monorradiculares apresentando necrose pulpar com lesão periapical. O objetivo foi avaliar radiograficamente a efetividade de 4 diferentes curativos de demora (PMCC, gel de clorexidina 2%, pasta de hidróxido de cálcio e hipoclorito de sódio1%. O tratamento endodôntico foi padronizado em todos os elementos através da técnica escalonada e irrigação com hipoclorito de sódio 1%. Para a medicação intracanal, os pacientes foram separados aleatoriamente em 4 grupos que receberam um dos medicamentos listados. Após 7 dias, os canais foram obturados e submetidos a controle radiográfico aos 3, 6 e 9 meses em que se mediu com precisão a diminuição do diâmetro radiolúcido apical. Os resultados mais satisfatórios ocorreram após o uso do PMCC, seguido pelo hidróxido de cálcio, clorexidina 2% e, por último, hipoclorito de sódio 1%

  2. Microscopic analysis of dog dental pulp after pulpotomy and pulp protection with mineral trioxide aggregate and white Portland cement Análise microscópica da polpa dental de cães após pulpotomia e proteção pulpar com agregado de trióxido mineral e cimento Portland branco

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    Renato Menezes

    2004-06-01

    Full Text Available Considering previous studies on the similarity between the chemical composition of the mineral trioxide aggregate and the Portland cement, the purpose of this study was to investigate the pulp response of dog's teeth after pulpotomy and direct pulp protection with MTA Angelus and white Portland cement. Thirty eight pulp remnants were protected with these materials. One hundred and twenty days after treatment, the animals were sacrificed and the specimens removed and prepared for histological analysis. Both materials demonstrated the same results when used as pulp capping materials, inducing hard tissue bridge formation and maintaining pulp vitality in all specimens. The MTA Angelus and the white Portland cement showed to be effective as pulp protection materials following pulpotomy.Considerando estudos anteriores sobre a similaridade entre a composição química do agregado de trióxido mineral e o cimento Portland, o objetivo deste estudo foi investigar a resposta pulpar de dentes de cães após pulpotomia e proteção pulpar direta com MTA Angelus e cimento Portland branco. Trinta e oito remanescentes pulpares foram recobertos com esses materiais. Cento e vinte dias após o tratamento, os animais foram sacrificados e os espécimes removidos e preparados para análise histológica. Ambos os materiais demonstraram os mesmos resultados quando utilizados como materiais de capeamento pulpar, induzindo a formação de ponte de tecido mineralizado e mantendo a vitalidade pulpar em todos os espécimes. Ambos matérias se mostraram efetivos como protetores pulpares após pulpotomia em dentes de cães.

  3. 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...

  4. NOVAS PERSPECTIVAS DA RESPONSABILIDADE PROCESSUAL NO BRASIL: O PRINCÍPIO DA BOA-FÉ OBJETIVA E O DEVIDO PROCESSO LEGAL

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    Thiago Rodrigues de Pontes Bomfim

    2016-09-01

    Full Text Available O presente estudo busca, inicialmente, demonstrar o caráter normativo dos princípios constitucionais, bem como seu papel no que acaba por se transformar em uma nova ordem processual, para, por fim, uma vez reconhecido o caráter de princípio jurídico à boa-fé objetiva, situar seu fundamento constitucional em um novo conceito de devido processo legal.

  5. Antioxidant, antibacterial and cytotoxic potential of silver nanoparticles synthesized using terpenes rich extract of Lantana camara L. leaves

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    Patil Shriniwas P.

    2017-07-01

    Full Text Available Several attempts have been made for green synthesis of silver nanoparticles (AgNPs using different plant extracts. Present study revealed that, antioxidant, antibacterial and cytotoxic AgNPs were synthesized using terpenes-rich extract (TRE of environmentally notorious Lantana camara L. leaves. AgNPs were characterized by advanced techniques like UV–Visible and Infra red spectroscopy; XRD, SEM techniques as terpenes coated sphere shaped NPs with average diameter 425 nm. Further, on evaluation, AgNPs were found to exhibit dose – dependent antioxidant potential, good to moderate antibacterial activity against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa; and toxicity on Brine shrimp (A. salinanauplii with LD50 value 514.50 µg/ml.

  6. Antioxidant, antibacterial and cytotoxic potential of silver nanoparticles synthesized using terpenes rich extract of Lantana camara L. leaves.

    Science.gov (United States)

    P, Patil Shriniwas; T, Kumbhar Subhash

    2017-07-01

    Several attempts have been made for green synthesis of silver nanoparticles (AgNPs) using different plant extracts. Present study revealed that, antioxidant, antibacterial and cytotoxic AgNPs were synthesized using terpenes-rich extract (TRE) of environmentally notorious Lantana camara L. leaves. AgNPs were characterized by advanced techniques like UV-Visible and Infra red spectroscopy; XRD, SEM techniques as terpenes coated sphere shaped NPs with average diameter 425 nm. Further, on evaluation, AgNPs were found to exhibit dose - dependent antioxidant potential, good to moderate antibacterial activity against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa; and toxicity on Brine shrimp (A. salinanauplii) with LD50 value 514.50 µg/ml.

  7. Lantana camara Linn root extract-mediated gold nanoparticles and their in vitro antioxidant and cytotoxic potentials.

    Science.gov (United States)

    Ramkumar, Rajendiran; Balasubramani, Govindasamy; Raja, Ramalingam Karthik; Raja, Manickam; Govindan, Raji; Girija, Easwaradas Kreedapathy; Perumal, Pachiappan

    2017-06-01

    The Lantana camara Linn root extract derived gold nanoparticles (Au NPs) were characterized by Ultraviolet-Visible spectroscopy, X-ray diffraction, fourier transform-infrared, high resolution transmission electron microscopy, selected area electron diffraction pattern and energy dispersive X-ray analyses. In DPPH assay, the inhibitory concentration (IC50) of Au NPs and gallic acid was 24.17 and 5.39 μg/ml, whereas, for cytotoxicity assay, the IC50 of Au NPs was 17.72 and 32.98 μg/ml on MBA-MB-231 and Vero cells, respectively. Thus, the Au NPs possess significant in vitro antioxidant and cytotoxic properties which could be considered as potential alternate for the development of anticancer drug in future.

  8. Anticonvulsant and depressant-like activity of ursolic acid stearoyl glucoside isolated from Lantana camara L. (verbanaceae

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    Imran Kazmi

    2012-05-01

    Full Text Available Objective: Ursolic acid stearoyl glucoside (UASG, a new terpenoid -isolated from Lantana camara L. was evaluated for its anticonvulsant and depressant activity of was in Wistar albino rats and Swiss mice. Methods: Column chromatography was used to isolate UASG. The intraperitonial administration of UASG (25 and 50 mg/kg produced a significant depressant effect on CNS. Anticonvulsant potential was experimentally proved and demonstrated through Maximal electroshock (MES induced seizure, Isoniazid (INH induced seizure and Assessment of locomotor activity test. Results: Administration of drug reduced spontaneous motor activity (P<0.05, the number and lethality (P<0.01 and P<0.001 of Isoniazid (INH-induced seizures and inhibition of hind limb extension in (P<0.05 and P<0.001 in Maximal Electroshock (MES-induced seizures. Conclusions: Research finding suggests that ursolic acid stearoyl glucoside possess anticonvulsant and depressant like effect.

  9. 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.

  10. Importancia de la semiología del dolor en el diagnóstico de un proceso inflamatorio pulpar Significance of pain's Symptomatology in the diagnosis of pulpal inflammatory process

    OpenAIRE

    Andrés Pérez Ruiz; Julia María Martínez Lima; Jannette Carmona Betancourt; María Elena Urgelles Jiménez

    2011-01-01

    El dolor es un síntoma de extraordinaria importancia en la práctica estomatológica y particularmente en lo concerniente a las alteraciones de la pulpa dentaria. Con el objetivo de profundizar en el conocimiento de las fases por las que atraviesa un proceso inflamatorio pulpar, que permiten predecir sus manifestaciones dolorosas, se realizó una revisión bibliográfica sobre el tema con un enfoque multidisciplinario y básico-clínico. Se utilizó el método documental para el análisis y tratamiento...

  11. Revascularización pulpar en dientes permanentes jóvenes con ápice abierto y pulpa necrótica: revisión bibliográfica

    OpenAIRE

    Molina Adame, Nuria

    2016-01-01

    INTRODUCCIÓN: La revascularización pulpar es un tratamiento regenerativo para tratar dientes inmaduros con pulpa necrótica por caries o traumatismos que, a diferencia de la apexificación y el uso de barreras apicales artificiales, permite la continuación del desarrollo radicular. Esta revisión tiene por objeto exponer el procedimiento y principios básicos de la revascularización así como ver las posibles ventajas e inconvenientes que presenta. MATERIAL Y MÉTODO: se realiza l...

  12. FACTORES BIOQUÍMICOS Y CELULARES EN LA RESPUESTA INFLAMATORIA PULPAR EN LOS EQUINOS Y SU IMPORTANCIA EN LA FARMACOTERAPIA ACTUAL PARA LA ABOLICIÓN DEL DOLOR PRE, INTRA Y POSOPERATORIO ENDODÓNTICO

    OpenAIRE

    Rafael Argueta López

    2013-01-01

    La enfermedad pulpar dental es un de sorden bucal común de los caballos y de gran impacto en la práctica de la clínica del dolor y anestesiología estomatológica veterinaria en equinos. Desafortunadamente, el examen oral realizado por la mayor parte de los médico veterinarios especialistas en equinos consiste sólo en separar los labios, observar los incisivos y colocar un dedo en el carrillo para palpar puntas sobre los primeros dientes superiores del carrillo. Este tipo de examen dete cta sól...

  13. Avaliação da tomografia por ocorrência óptica como método de visualização da câmara pulpar e canal radicular

    OpenAIRE

    KAUFFMAN, Cynthia Macêdo Feijó

    2006-01-01

    Tomografia por coerência óptica (OCT) é uma técnica óptica recente para fazer imagens biomédicas. Ela realiza imagens tomográficas em secções transversais de microestruturas de tecidos biológicos com alta resolução. O objetivo deste trabalho foi avaliar a OCT como método de diagnóstico por imagem da estrutura interna do dente, especialmente câmara pulpar e canal radicular. Nos experimentos foram utilizados dois dentes extraídos de ratos albinos, primeiros molares. O sistema de OCT desenvolvid...

  14. 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

  15. Evaluation of liver function impairment and lipid peroxidation induced by lantana camara leaf powder administration in adult rat serum and liver.

    Science.gov (United States)

    Saini, N; Singh, J; Sehgal, R; Ojha, S

    2007-05-30

    Lantana camara is a common weed and certain medicinal properties have been attributed to this plant, but most varieties of this plant are reported to be highly toxic to animals. The plant is a native of America but a few varieties are indigenous to tropical Asia and Africa. The present investigation was done to study the hepatotoxic and lipid peroxidative effects of this noxious weed on female Wistar rats. Eighty four percent (84%) increase was observed in the activity of AST in group B and 120% increase was noted in group C in serum. In, liver tissue this increase was 66% and 258%. In the case of ALT, 165% increase was observed in group B and 219% increase was observed in group C in serum. In, liver there was 46% increase in group B and 216% increase in group C in the ALT activity. Similarly, 30% and 50% increase in group B and 120% and 300% increase in group C in the activity of ALP was observed with respect to control group. The overall protein concentration was increased in serum and decreased in liver tissue. Lipid peroxidation in liver tissue was inhibited by 22% in group B and 55% in group C. Thus Lantana camara is a toxic plant which produces severe hepatotoxicity in rats, but it also prevented lipid peroxidation that may suggest that Lantana camara may be acting as antioxidant but, exactly which of its component is responsible for this activity is not known and needs future investigations.

  16. Evaluation of the antibacterial activity of Ventilago madraspatana Gaertn., Rubia cordifolia Linn. and Lantana camara Linn.: isolation of emodin and physcion as active antibacterial agents.

    Science.gov (United States)

    Basu, Subhalakshmi; Ghosh, Abhijit; Hazra, Banasri

    2005-10-01

    The antibacterial activity of the extracts of Ventilago madraspatana stem-bark, Rubia cordifolia root and Lantana camara root-bark, prepared with solvents of different polarity, was evaluated by the agar-well diffusion method. Twelve bacteria, six each of gram-positive and gram-negative strains, were used in this study. Chloroform and ethanol extracts of V. madraspatana showed broad-spectrum activity against most of the bacteria except S. aureus, E. coli and V. cholerae. On the other hand, the activity of the chloroform and methanol extracts of R. cordifolia and L. camara was found to be more specific towards the gram-positive strains, although gram-negative P. aeruginosa was also inhibited by the methanol extracts of both these plants in a dose dependent manner. The water extracts of V. madraspatana and L. camara were found to be inactive, while that of R. cordifolia was significantly active against B. subtilis and S. aureus compared with streptomycin and penicillin G used as standards. In the course of bio-assay guided fractionation, emodin and physcion were isolated for the first time from the stem-bark of V. madraspatana. It was noteworthy to find the MICs of emodin in the range 0.5-2.0 microg/mL against three Bacillus sp. Both the anthraquinonoid compounds inhibited P. aeruginosa, emodin being more effective, showing an MIC of 70 microg/mL. Copyright (c) 2005 John Wiley & Sons, Ltd.

  17. Effect of two biodegradable chelates on metals uptake, translocation and biochemical changes of Lantana Camara growing in fly ash amended soil.

    Science.gov (United States)

    Pandey, Shikha Kumari; Bhattacharya, Tanushree

    2017-10-20

    The present work had two purposes firstly to evaluate the potential of Lantana Camara for phytoextraction of heavy metals from fly ash amended soil and to assess the suitability of a proper biodegradable chelating agent for chelate assisted phytoextraction. Plants were grown in manure mixed soil amended with various concentration of fly ash. Two biodegradable chelating agents were added (EDDS and MGDA) in the same dose separately before maturation stage. Sampling was done at different growing stages. The plant took up metal in different plant parts in the following order: for Cu, and Zn leaf >root >stem, for Cr and Mn leaf>stem >root, for Ni root >leaf>stem and for Pb root≈leaf>stem respectively. For Cu, Zn, Cr and Mn Lantana camara acted as phytoextractor. Translocation factor and bioaccumulation coefficient was>1 signifying enrichment and translocation of metals in the plant. Morphological studies showed no toxicity symptom in the plant. Among biochemical parameters protein and nitrate reductase activity decreased, whereas, chlorophyll and peroxidise activity increased with the growth stages. Finally, it was evident from the results that Lantana Camara can be used as efficient phytoextractor of metals, with proper harvesting cycle and both chelate were proved as effective chelators for phytoextraction of metals.

  18. [Microscopic anatomy and volatile secondary metabolites at three stages of development of the inflorescences of Lantana camara (Verbenaceae)].

    Science.gov (United States)

    Caroprese Araque, José Fernando; Parra Garcés, María Isabel; Arrieta Prieto, Dagoberto; Stashenko, Elena

    2011-03-01

    Plants of the Verbenaceae family, like L. camara, have called the attention of researchers, not only because of its high diversity and its distribution around the world, but also for its variable use as popular medicine to treat diseases like tetanus, rheumatism and malaria, and as bactericide and insecticide. To assess this, the morphology and ontogeny of the inflorescences of Lantana camara and the chemical composition of volatile secondary metabolites were analyzed at three different ontogeny stages. Plants were collected from the experimental crop area in CENIVAM, Bucaramanga, Colombia. Fresh inflorescence stages were established and analyzed using a stereoscopic microscope, fixed in FAA and included in parafine. Transversal and longitudinal 10 microm thick sections were prepared using a rotative microtome, safranine-fastgreen stained and were observed and photographed using a light microscope. The chemical composition of volatile secondary metabolites were analyzed for each stage. The analytes, obtained from 0.7 g of plant, were isolated by solid phase micro-extraction in the headspace mode (HS-SPME) and were placed in 20 ml vials. The components were analyzed by gas chromatography coupled to mass spectrometry (GC-MS). Stage I was microscopically characterized by an immature development in which the meristematic differentiation begins with a mass of cells. In Stage II, the morphogenetic movement gives way to the formation of the respective floral sexual structures, calyx and corolla. In Stage III, the different organs are conspicuous: four stamens epipetals and didynamous, monocarpelar, biloculate and globose gynoecium, upper ovary and lateral stigma; the flowers are hermaphroditic. The main secondary metabolites detected by GC-MS were bicyclosesquiphellandrene, E-beta-farnesene, E-beta-caryophyllene, gamma-muurolene + gamma-curcumene and alpha-zingiberene. Nevertheless, this study reports for the first time in plant species alpha-gurjunene, gamma

  19. 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)

  20. 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. Copyright © 2015 Elsevier B.V. All rights reserved.

  1. 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. Copyright © 2014 Elsevier B.V. All rights reserved.

  2. Importancia de la semiología del dolor en el diagnóstico de un proceso inflamatorio pulpar Significance of pain's Symptomatology in the diagnosis of pulpal inflammatory process

    Directory of Open Access Journals (Sweden)

    Andrés 0 Pérez Ruiz

    2011-09-01

    Full Text Available El dolor es un síntoma de extraordinaria importancia en la práctica estomatológica y particularmente en lo concerniente a las alteraciones de la pulpa dentaria. Con el objetivo de profundizar en el conocimiento de las fases por las que atraviesa un proceso inflamatorio pulpar, que permiten predecir sus manifestaciones dolorosas, se realizó una revisión bibliográfica sobre el tema con un enfoque multidisciplinario y básico-clínico. Se utilizó el método documental para el análisis y tratamiento de la información ofrecida por las fuentes teóricas. El sitio en Internet Google fue empleado como fundamental motor de búsqueda y Lilacs, Hinari, Medline y PubMed fueron las bases de datos más revisadas. La clasificación del estado de inflamación pulpar, que atiende a eventos histopatológicos que no se pueden visualizar, resulta más difícil. Se podría lograr mayor precisión en un diagnóstico basado en el curso que sigue el dolor, de acuerdo a la magnitud del compromiso inflamatorio y apoyado en la rica semiología que se puede obtener si se sigue la trayectoria de las variables del estímulo nociceptivo. El incremento y profundización de los conocimientos en este campo contribuiyó significativamente a un mejor diagnóstico y tratamiento de los procesos inflamatorios pulpares.Pain is a symptom very important in the stomatologic practice and particularly in that concerning to dental pulp alterations. To deep in the knowledge of phases crossed by a pulpal inflammatory process allowing predicting its painful manifestations, authors made a bibliographic review on this subject with a multidisciplinary and basic-clinical approach, using the documentary method for analysis and management of information offered by theoretical sources. Google was used as a fundamental search tool and LILACS, HINARI, Medline and PubMed were the more reviewed databases. The classification of pulpal inflammation state, taking into account non

  3. O INSTITUTO DO INQUÉRITO CIVIL VISTO COMO FORMA E MEIO IMPORTANTE PARA PACIFICAR AS DEMANDAS COLETIVAS E A DISCUSSÃO DE SEU DEVIDO PROCESSO CONSTITUCIONAL

    Directory of Open Access Journals (Sweden)

    Francisco das Chagas da Silva

    2017-06-01

    Full Text Available O objetivo deste trabalho é abordar as peculiaridades do inquérito civil no direito brasileiro sob a ótica dos princípios que embasam o devido processo legal. Introduzido pela lei da Ação Civil Pública, o Inquérito Civil é um instituto de titularidade do Ministério Público voltado a auxiliar a pacificação dos conflitos coletivos, servindo de fundamento para a propositura de ações coletivas e de firmação do termo de ajustamento de conduta (TAC, mecanismos processuais e extraprocessuais que tem como finalidade a defesa de interesses difusos, coletivos e individuais homogêneos. Durante todo o desenvolvimento desta pesquisa foram analisadas diversas obras literárias dos mais variados autores da área do direito processual civil, do direito processual do trabalho e do direito constitucional, além da apreciação de dados oriundos da jurisprudência pátria, bem como revistas e periódicos da área jurídica pertinentes ao tema aqui desenvolvido. O trabalho está dividido numa apreciação sobre o devido processo constitucional e nos princípios norteadores do processo. Depois será desenvolvida uma análise acerca da natureza jurídica do inquérito civil e, por fim, uma discussão acerca do contraditório nesse procedimento administrativo, verificando as argumentações doutrinárias que negam a aplicação deste princípio.

  4. The anti-mycobacterial activity of Lantana camara a plant traditionally used to treat symptoms of tuberculosis in South-western Uganda.

    Science.gov (United States)

    Kirimuhuzya, Claude; Waako, Paul; Joloba, Moses; Odyek, Olwa

    2009-03-01

    Tuberculosis continues to be a devastating public health problem. Many communities in Uganda use medicinal plants to treat various infections, including respiratory tract infections. There are claims that some can treat tuberculosis. Verifying some of these claims could lead to discovery of lead compounds for development of a TB drug. Chloroform and methanol extracts of L. camara collected from South-western Uganda were screened against three strains of Mycobacterium tuberculosis using the agar-well diffusion method. H37Rv, the rifampicin-resistant TMC-331 and a non-resistant wild strain (28-25271). The MIC and MBC were determined using the Agar dilution method on Middle brook 7H11. The methanol extract showed the highest activity against all the three strains used, with zones of inhibition of 18.0-22.5 mm and MIC values of 20 µg/ml for H37Rv and 15 µg/ml for both TMC-331 and wild stain. The values for rifampicin were 1.0 µg/ml for both H37Rv and wild strain but rifampicin hardly showed any activity on TMC-331. The MBC value for the methanol extract of L. camara was 30µg/ml for the H37Rv, and 20µg/ml for both the TMC-331 and wild strains of M. tuberculosis. The MBC for rifampicin was 2.0µg/ml for both H37Rv and the wild strain. We conclude that L. camara contains principles active against M. tuberculosis, which merit further research.

  5. Are there evidences of a complex mimicry system among Asclepias curassavica (Apocynaceae), Epidendrum fulgens (Orchidaceae), and Lantana camara (Verbenaceae) in Southern Brazil?

    OpenAIRE

    Fuhro, Daniela; Araújo, Aldo Mellender de; Irgang, Bruno Edgar

    2010-01-01

    The goal of this paper was to test the presence of mimicry in Asclepias curassavica L., Epidendrum fulgens Brong., and Lantana camara L. The study was carried out at the Parque Estadual de Itapeva, RS, southern Brazil, from 2004 to 2006. Flowering period of each of the three species was followed up; focal observations of butterflies visiting flowers, from fixed point and during random walks were carried out. We also estimated the frequency of pollinaria removal in the orchid, as well as its m...

  6. Avaliação da acurácia entre o diagnóstico clínico e os achados histopatológicos das alterações pulpares degenerativas e inflamatórias

    OpenAIRE

    José Neto da Costa

    2015-01-01

    Resumo: Correlacionar a patologia pulpar com os sinais e sintomas clínicos, contínua sendo motivo de pesquisa e um dilema clínico na definição da opção terapêutica a ser instituída, visto que o diagnóstico final só pode ser estabelecido pelo exame histopatológico que não é um procedimento de rotina. Assim, este trabalho teve como objetivos confrontar o diagnóstico clínico obtido por meio de semiologia endodôntica subjetiva e objetiva, com a análise histopatológica de polpas extirpadas de dent...

  7. Uso de anfotericina B como antifúngico no meio de cultura para células pulpares humanas = Use of amphotericin B as antifungal agent in a culture medium for human dental pulp cells

    Directory of Open Access Journals (Sweden)

    Luisi, Simone Bonato

    2008-01-01

    Full Text Available Objetivo: O presente trabalho tem como objetivo avaliar o comportamento de células da polpa, de terceiros molares humanos, cultivadas na presença ou ausência de um antifúngico (anfotericina B. Metodologia: As células pulpares foram obtidas de seis terceiros molares inclusos, após extração por motivos ortodônticos. A polpa foi cortada em fragmentos e estes foram incubados a 37ºC, por 60 minutos, em solução tampão contendo 0,2% de colagenase. A suspensão de células foi dividida em 2 tubos e centrifugada, sendo um pellet ressuspenso em meio – DMEM suplementado com 10% de soro fetal bovino, 100 unidades/mL de penicilina, 100µg/mL de estreptomicina, 0,45µg/mL de gentamicina e 3,7mg/L HEPES, e o outro ressuspenso no mesmo meio, porém contendo 2,5µg/mL de anfotericina B. As células foram semeadas em placas de cultura plásticas e incubadas em atmosfera 5% de CO²/95% de ar a 37ºC. Resultados: Dos seis dentes testados, dois não apresentaram crescimento celular em qualquer dos meios testados. Nos demais quatro dentes, houve crescimento celular em ambos meios, sendo este mais proeminente no meio sem anfotericina B. Conclusão: Apesar da anfotericina B ser importante para a prevenção de contaminações por fungos, concluiu-se que esta dificulta o estabelecimento de células pulpares humanas em cultura

  8. Antiurolithiatic Activity of Extract and Oleanolic Acid Isolated from the Roots of Lantana camara on Zinc Disc Implantation Induced Urolithiasis

    Science.gov (United States)

    Argal, Ameeta

    2013-01-01

    The present study was done to evaluate the antiurolithiatic activity of ethanolic extract of roots (ELC 200 mg/kg) and oleanolic acid (OA 60 mg/kg, O.A. 80 mg/kg, O.A. 100 mg/kg) isolated from roots of Lantana camara in albino wistar male rats using zinc disc implantation induced urolithiatic model. The group in which only zinc disc was implanted without any treatment showed increase in calcium output (23  ± 2.7 mg/dL). Cystone receiving animals showed significant protection from such change (P < 0.01). Treatment with OA and ELC significantly reduced the calcium output at a dose of OA 60 mg/kg (P < 0.01), OA 80 mg/kg (P < 0.01), ELC 200 mg/kg (P < 0.01), and OA 100 mg/kg (P < 0.001), as compared with zinc disc implanted group. The average weight of zinc discs along with the deposited crystals in the only disc implanted group was found to be 111 ± 8.6 mg. Group that received Cystone 500 mg/kg showed significant reduction in the depositions (P < 0.001). Similarly, the rats which received OA and ELC showed reduced formation of depositions around the zinc disc (P < 0.001). The X-ray images of rats also showed significant effect of OA and ELC on urolitiasis. Thus, OA and ELC showed promising antiurolithiatic activity in dose dependant manner. PMID:23762599

  9. 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.

  10. 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.

  11. 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.

  12. 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.

  13. Estudo clínico, radiográfico, histológico e imuno-histoquímico na resposta pulpar após o uso de diferentes materiais capeadores em pulpotomias de dentes decíduos humanos

    OpenAIRE

    Natalino Lourenço Neto

    2013-01-01

    O objetivo deste estudo foi avaliar: 1) a resposta pulpar de dentes decíduos humanos após pulpotomia com diferentes materiais capeadores por meio de análise clínica, radiográfica e histológica; e 2) a expressão da Proteína 1 da Matriz Dentinária (DMP-1) na resposta pulpar. Vinte e cinco molares decíduos inferiores de 22 crianças com idade entre 6 e 9 anos foram criteriosamente selecionados. Os dentes foram randomicamente divididos nos grupos Formocresol de Buckley diluído a 1/5 (Grupo I - FC)...

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

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    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%.

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

    Science.gov (United States)

    Swamy, Mallappa Kumara; Sinniah, Uma Rani; Akhtar, Mohd Sayeed

    2015-01-01

    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%).

  16. Chemical constituents and antifilarial activity of Lantana camara against human lymphatic filariid Brugia malayi and rodent filariid Acanthocheilonema viteae maintained in rodent hosts.

    Science.gov (United States)

    Misra, Namita; Sharma, Mithilesh; Raj, Kanwal; Dangi, Anil; Srivastava, Sudhir; Misra-Bhattacharya, Shailja

    2007-02-01

    Lymphatic filariasis continues to be a major health problem in tropical and subtropical countries. A macrofilaricidal agent capable of eliminating adult filarial parasites is urgently needed. In the present study, we report the antifilarial activity in the extract of stem portion of the plant Lantana camara. The crude extract at 1 g/kg for 5 days by oral route killed 43.05% of the adult Brugia malayi parasites and sterilized 76% of surviving female worms in the rodent model Mastomys coucha. A 34.5% adulticidal activity along with sterilization of 66% of female worms could be demonstrated in the chloroform fraction. Remarkable antifilarial activity was observed in the adult B. malayi transplanted gerbil model where up to 80% of the adult worms could be killed at the same dose and all the surviving female parasites were found sterilized. The extract was also found effective against a subcutaneous rodent filariid Acanthocheilonema viteae maintained in Mastomys coucha, where it exerted strong microfilaricidal (95.04%) and sterilization (60.66%) efficacy with mild macrofilaricidal action. Two compounds, oleanonic acid and oleanolic acid, isolated from hexane and chloroform fractions showed LC100 at 31.25 and 62.5 mug/ml, respectively, on B. malayi in vitro. This is the first ever report on the antifilarial efficacy of Lantana camara.

  17. Nematicidal activity of leaf extracts from Lantana camara L. against Meloidogyne incognita (kofoid and white chitwood and its use to manage roots infection of Solanum melongena L.

    Directory of Open Access Journals (Sweden)

    Faheem Ahmad

    2010-06-01

    Full Text Available Various concentrations of aqueous leaf extract of Lantana camara were assessed in vitro conditions against second stage juveniles (J2 of Meloidogyne incognita. The standard concentration 'S' of leaf extract was found to be highly nematostatic, where nematodes were completely paralyzed after 12 h and after 48 h of exposure, 96% of juveniles were killed at same concentration. However, the mortality of juveniles was 75% in S/2 dilution at 48 h. The degree of effectiveness and dilutions of extract were directly proportional. The percentage of paralyzed juveniles was decreased, when J2 transferred in distilled water after 48 h incubation in standard aqueous leaf extract. Addition of freeze-dried aqueous extract to sterile sandy substrate at S/2 dilution significantly decreased the root-knot infection to susceptible eggplants whereas second stage juveniles (J2 that penetrated roots of eggplant were able to complete development in sterile sandy substrate without treatment of freeze-dried aqueous extract.

  18. Cytotoxic pentacyclic triterpenoids from Combretum sundaicum and Lantana camara as inhibitors of Bcl-xL/BakBH3 domain peptide interaction.

    Science.gov (United States)

    Litaudon, Marc; Jolly, Claire; Le Callonec, Catherine; Cuong, Dao Din; Retailleau, Pascal; Nosjean, Olivier; Nguyen, Van Hung; Pfeiffer, Bruno; Boutin, Jean A; Guéritte, Françoise

    2009-07-01

    In an effort to discover potent inhibitors of the antiapoptotic protein Bcl-xL, a systematic in vitro evaluation was undertaken on extracts prepared from various parts of Vietnamese plants. The ethyl acetate extracts obtained from the leaves and flowers of Combretum sundaicum and the leaves of Lantana camara were selected for their interaction with the Bcl-xL/Bak association. Bioassay-guided purification of these species led to the isolation of 15 pentacyclic triterpenoids (1-15) possessing olean-12-en-28-oic acid and olean-12-en-29-oic acid aglycons, of which compounds 1-6 and 8-10 are new. Five compounds exhibited binding activity with K(i) values between 5.3 and 17.8 microM. The cytotoxic activity of 1-15 was also evaluated on various cancer cell lines.

  19. Anatomía microscópica y metabolitos secundarios volátiles en tres estadios del desarrollo de las inflorescencias de Lantana camara (Verbenaceae

    Directory of Open Access Journals (Sweden)

    José Fernando Caroprese Araque

    2011-03-01

    Full Text Available Las plantas de la familia Verbenaceae, entre ellas la especie Lantana camara L., poseen una alta diversidad botánica además de su variable uso. Se describe el avance morfoanatómico de tres etapas de desarrollo de las inflorescencias de L. camara L. (Verbenaceae, recolectadas en Bucaramanga, Colombia. Para esto se tincionaron las estructuras vegetales mediante la técnica fast-green, previo a los análisis con microscopía óptica convencional. El aislamiento de los analitos de cada estadio se realizó mediante la técnica de microextracción en fase sólida en el modo headspace (HS-SPME y su posterior análisis de componentes, mediante cromatografía de gases acoplada a espectrometría de masas (GC-MS. En el Estadio I se apreció un grupo de células en donde se inicia la diferenciación meristemática. En el Estadio II, los movimientos morfogenéticos dan paso a la formación de las respectivas estructuras sexuales florales, el cáliz y la corola. Al llegar al Estadio III, se observaron claramente los diferentes órganos. Los metabolitos detectados en este estudio y que no fueron encontrados en la bibliografía revisada fueron, el α- gurjuneno, el Υ-amorfeno, el α-muuroleno, el sesquitujeno, el α-trans- bergamoteno y el trans-cadina-1,4-dieno. Los principales metabolitos secundarios detectados fueron: biciclosesquifelandreno, E-β-farneseno, E-β-cariofileno, Υ- muuroleno+Υ-curcumeno y α-zingibereno. Una función importante de éstas y otras esencias florales es la defensa y la protección durante el estrés abiótico de la planta.

  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. © The Author 2015. Published by Oxford University Press on behalf of the Entomological Society of America.

  1. Poluentes do ar e internações devido a doenças cardiovasculares em São José do Rio Preto, Brasil

    Directory of Open Access Journals (Sweden)

    Kátia Cristina Cota Mantovani

    2016-02-01

    Full Text Available Resumo O presente estudo teve como objetivo estimar os efeitos de poluentes ambientais sobre o número de internações por doenças cardiovasculares. Foi um estudo ecológico com dados de internações hospitalares de residentes em São José do Rio Preto, São Paulo, Brasil, com diagnóstico nas categorias de I-00 a I-99, entre 01/10/11 e 30/09/12. Os poluentes analisados foram partículas finas (PM2,5, ozônio, monóxido de carbono, óxido de nitrogênio e dióxido de nitrogênio. Foram estimados pelo modelo CCATT-BRAMS. O uso do modelo aditivo de regressão de Poisson foi utilizado para estimar associação entre a exposição ao PM2,5 e internação por doença cardiovascular. Foram calculados os excessos de internação e os gastos por estas doenças. Observou-se que a exposição ao PM2,5 no quinto dia após a exposição (lag 5 foi significativo para internação e aumentou em 15 ppts segundo incremento de 10µg /m3 na concentração de PM2,5. Foram identificadas 650 internações evitáveis com custos da ordem de R$ 1,9 milhão. Desse modo, foi possível identificar associação entre exposição ao PM2,5 e internações devido a doenças cardiovasculares em cidades de médio porte como São José do Rio Preto fornecendo subsídios aos gestores municipal e regional de Saúde.

  2. Composição química e avaliação das atividades antibacteriana e de toxicidade dos óleos essenciais de Lantana camara L. e Lantana sp.

    Directory of Open Access Journals (Sweden)

    José G. M. da Costa

    Full Text Available Os óleos essenciais de Lantana camara L. e Lantana sp., Verbenaceae, foram obtidos por hidrodestilação e seus componentes analisados por CG/EM. Tal procedimento analítico revelou a predominância dos sesquiterpenos, biciclogermacreno (19,42%, isocariofileno (16,70%, valenceno (12,94% e germacreno D (12,34% no óleo de L. camara, enquanto o biciclogermacreno (13,93%, germancreno D (27,54 e β-cariofileno (31,50%, % destacaram-se como majoritários no óleo de Lantana sp. Os dois óleos foram submetidos a avaliação de atividades antibacteriana e de toxicidade usando as larvas de Artemia salina. Os resultados mostraram considerável atividade antibacteriana do óleo de L. camara, principalmente para Proteus vulgaris (ATCC 13315 e Escherichia coli (ATCC 25922. O óleo de Lantana sp. mostrou-se mais significativo contra Sthaphylococcus aureus (ATCC 10390. As atividades de toxicidade CL50 revelaram resultados inferiores ao limite padrão de 1000 μg/mL.

  3. 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.

  4. Anatomía microscópica y metabolitos secundarios volátiles en tres estadios del desarrollo de las inflorescencias de Lantana camara (Verbenaceae

    Directory of Open Access Journals (Sweden)

    José Fernando Caroprese Araque

    2011-03-01

    Full Text Available Las plantas de la familia Verbenaceae, entre ellas la especie Lantana camara L., poseen una alta diversidad botánica además de su variable uso. Se describe el avance morfoanatómico de tres etapas de desarrollo de las inflorescencias de L. camara L. (Verbenaceae, recolectadas en Bucaramanga, Colombia. Para esto se tincionaron las estructuras vegetales mediante la técnica fast-green, previo a los análisis con microscopía óptica convencional. El aislamiento de los analitos de cada estadio se realizó mediante la técnica de microextracción en fase sólida en el modo headspace (HS-SPME y su posterior análisis de componentes, mediante cromatografía de gases acoplada a espectrometría de masas (GC-MS. En el Estadio I se apreció un grupo de células en donde se inicia la diferenciación meristemática. En el Estadio II, los movimientos morfogenéticos dan paso a la formación de las respectivas estructuras sexuales florales, el cáliz y la corola. Al llegar al Estadio III, se observaron claramente los diferentes órganos. Los metabolitos detectados en este estudio y que no fueron encontrados en la bibliografía revisada fueron, el α- gurjuneno, el Υ-amorfeno, el α-muuroleno, el sesquitujeno, el α-trans- bergamoteno y el trans-cadina-1,4-dieno. Los principales metabolitos secundarios detectados fueron: biciclosesquifelandreno, E-β-farneseno, E-β-cariofileno, Υ- muuroleno+Υ-curcumeno y α-zingibereno. Una función importante de éstas y otras esencias florales es la defensa y la protección durante el estrés abiótico de la planta.Microscopic anatomy and volatile secondary metabolites at three stages of development of the inflorescences of Lantana camara (Verbenaceae. Plants of the Verbenaceae family, like L. camara, have called the attention of researchers, not only because of its high diversity and its distribution around the world, but also for its variable use as popular medicine to treat diseases like tetanus, rheumatism and

  5. 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

  6. Changes in Physicochemical Properties of Soil Encourage the Invasion Establishment and Carbon Dynamics of Lantana camara from Doon Valley, Western Himalaya, India

    Directory of Open Access Journals (Sweden)

    Gautam Mandal

    2014-07-01

    Full Text Available Abstract - Lantana camara L. is a recognized weed of worldwide significance due to its widespread distribution and impacts on nature conservation. In this study physicochemical properties of soil were analysed from different high and low Lantana infested areas. Significant site effect was frequently observed than effect due to invasion status. The present study tested the impact of soil properties in the measured and calculated attributes of Lantana by randomly sampling soil from the highly invaded and less invaded sites in different habitats using the Modified Whittaker plot design. Ten samples were collected at high invaded and ten at less invaded sites per habitat totalling to 120 which were obtained and analysed. One way analysis of variance (ANOVA results indicated that edaphic factors such as soil pH, total nitrogen, soil organic carbon, Phosphorus and Potassium content positively influenced the growth of Lantana and helped in the further invasion process. These factors were also positively influencing the measured and calculated attributes of Lantana such as canopy coverage, average crown diameter, shrub canopy area, phytovolume and biomass from all sites. However some attributes like shrub height and stem diameter were negatively influenced by these soil factors. The level of these soil nutrients was found elevated in all Lantana invaded sites as compared to less invaded sites. The present results reveal that Lantana invasion can not only significantly improve the soil nutrient level but also positively increase the chances of its further invasion with more copious plant attributes.

  7. Oleanane triterpenes with protein tyrosine phosphatase 1B inhibitory activity from aerial parts of Lantana camara collected in Indonesia and Japan.

    Science.gov (United States)

    Abdjul, Delfly B; Yamazaki, Hiroyuki; Maarisit, Wilmar; Rotinsulu, Henki; Wewengkang, Defny S; Sumilat, Deiske A; Kapojos, Magie M; Losung, Fitje; Ukai, Kazuyo; Namikoshi, Michio

    2017-09-13

    During the search for new protein tyrosine phosphatase (PTP) 1B inhibitors, EtOH extracts from the aerial parts of Lantana camara L. (lantana) collected at Manado (Indonesia) and two subtropical islands in Japan (Ishigaki and Iriomote Islands, Okinawa) exhibited potent inhibitory activities against PTP1B in an enzyme assay. Four previously undescribed oleanane triterpenes were isolated together with known triterpenes and flavones from the Indonesian lantana. The EtOH extracts of lantana collected in Ishigaki and Iriomote Islands exhibited different phytochemical profiles from each other and the Indonesian lantana. Triterpenes with a 24-OH group were isolated from the Indonesian lantana only. Five known triterpene compounds were detected in the Ishigaki lantana, and two oleanane triterpenes with an ether linkage between 3β and 25 were the main components together with five known triterpenes as minor components in the Iriomote lantana. The structures of previously undescribed compounds were assigned on the basis of their spectroscopic data. Among the compounds obtained in this study, oleanolic acid exhibited the most potent activity against PTP1B, and is used as a positive control in studies on PTP1B. Copyright © 2017 Elsevier Ltd. All rights reserved.

  8. 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.

  9. Evaluation of the in vitro effect of a Lantana camara extract on the labeling of blood constituents of rats with technetium-99m.

    Science.gov (United States)

    Maiworm, A I; Santos-Filho, S D; Presta, G A; Giani, T S; Paoli, S; Bernardo-Filho, M

    2008-03-01

    Blood constituents labeled with technetium-99m (99mTc) have been used in nuclear medicine procedures and drugs are capable to interfere on this labeling. Lantana camara (lantana) has medicinal properties and it has been used in folk medicine. The aim is to verify the effect of a lantana extract on the labeling of blood constituents with 99mTc. Blood of rats was incubated with extract, stannous chloride and 99mTc, as sodium pertechnetate. Plasma (P) and blood cells (BC) were isolated, also precipitated with trichloroacetic acid and soluble (SF) and insoluble fractions (IF) were separated. The % of radioactivity (%ATI) in these samples was calculated. Samples of labeled BC were washed and the %ATI maintained (%ATI-M) in the BC was determined. The results showed that lantana extract decreased significantly (p < 0.05) in the IF-P from 70.24 +/- 2.59 to 11.95 +/- 3.07. This effect was not observed in the BC and IF-BC. The BC-%ATI-M was significantly (p < 0.05) decreased in all concentrations tested when the BC was washed. This fact was not observed in the control. Substances present on the extract should have redoxi action decreasing the concentration of the stannous ion and this condition could justify the effect on the IF-P. The results about the BC-%ATI-M should indicate a possible effect on the transport of ions through the erythrocyte membrane.

  10. Effects of Lantana camara leaf extract on the activity of superoxide dismutase and accumulation of H2O2 in water hyacinth leaf.

    Science.gov (United States)

    Zheng, Hui-Qiong; Wei, Ning; Wang, Liu-Fa; He, Ping

    2006-04-01

    Water hyacinth (Eichhornia crassipes) is one of the most productive plants, but is also a troublesome weed in the world. In order to protect the public water system from chemical herbicides pollution, biological method has been suggested to control the growth and the reproduction of this weed. Lantana (Lantana camara L.) is an important weed of the family Verbenaceae and its leaf extract is highly toxic to water hyacinth. The results of this study showed that the extract of lantana leaves suppressed the emergence of leaf buds of water hyacinth plant, and caused the decay of its leaves by foliar spraying. In addition, the increase of SOD activity in water hyacinth leaves was in accordance with the accumulation of H(2)O(2) and the increase in degree of membrane peroxidation, while the activity of catalase, which might remove the excessive H(2)O(2) in water hyacinth leaves, was inhibited by treatment with lantana extract. At tissue level, high H(2)O(2) histochemical labeling was detected in guard cells after treatment with lantana extract. This overproduction of H(2)O(2) could kill the leaf cells and cause leaf necrosis in the treated plant. Therefore, the high toxicity of lantana leaf extract to water hyacinth might be due to oxidative stress.

  11. Vermicomposting of toxic weed--Lantana camara biomass: chemical and microbial properties changes and assessment of toxicity of end product using seed bioassay.

    Science.gov (United States)

    Suthar, Surindra; Sharma, Priyanka

    2013-09-01

    This work illustrates the results of vermicomposting trials of noxious weed - Lantana camara (LL) leaf litter spiked with cow dung (CD) in different ratios (0%, 20%, 40%, 60% and 80%) using Eisenia fetida. A total of five treatments were established and changes in chemical and microbial properties of vermibeds have been observed for 60 days. In all treatments, a decrease in pH (19.5-30.7%), total organic carbon (TOC) (12-23%) and C:N ratio (25-35%), but increase in ash content (16-40%), total N(N(tot)) (11-32%), available phosphorous (P(avail)) (445-629%), exchangeable potassium (K(exch)) (63-156%) exchangeable calcium (Ca(exch)) (67-94%),and N-NO3(-) (164-499%) was recorded. Vermibeds with 40-60% LL (T2 and T3) showed better mineralization rate. The number of fungi, bacteria and actinomycetes showed 0.33-1.67-fold, 0.72-2.33-fold and 2.03-2.99-fold increase, respectively after vermicomposting process. The germination index (GI) was between 47% and 83% in all vermicomposts as indicated by seed bioassay test. Results thus suggested that Lantana may be a potential source for vermicompost production for sustainable agriculture. Copyright © 2013 Elsevier Inc. All rights reserved.

  12. Pyrolysis of Lantana camara and Mimosa pigra: Influences of temperature, other process parameters and incondensable gas evolution on char yield and higher heating value.

    Science.gov (United States)

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

    2017-11-01

    Pyrolysis of invasive non-indigenous plants, Lantana camara (LC) and Mimosa pigra (MP) was conducted at milligram-scale for optimisation of temperature, heating rate and hold time on char yield and higher heating value (HHV). The impact of scaling-up to gram-scale was also studied, with chromatography used to correlate gas composition with HHV evolution. Statistically significant effects of temperature on char yield and HHV were obtained, while heating rate and hold time effects were insignificant. Milligram-scale maximised HHVs were 30.03MJkg(-1) (525°C) and 31.01MJkg(-1) (580°C) for LC and MP, respectively. Higher char yields and HHVs for MP were attributed to increased lignin content. Scaling-up promoted secondary char formation thereby increasing HHVs, 30.82MJkg(-1) for LC and 31.61MJkg(-1) for MP. Incondensable gas analysis showed that temperature increase beyond preferred values caused dehydrogenation that decreased HHV. Similarly, CO evolution profile explained differences in optimal HHV temperatures. Copyright © 2017 Elsevier Ltd. All rights reserved.

  13. A utilização de tratamento preventivo e corretivo em indivíduos com risco de deficiência de cálcio devido à medicação

    OpenAIRE

    Santos, Catarina Luzia Duarte Santos

    2015-01-01

    Introdução: As interações entre os medicamentos e a nutrição nem sempre são valorizadas na prática clínica, muitas vezes devido ao pouco conhecimento por parte dos profissionais de saúde. Estas interações podem resultar em desnutrição e, por isso pode ser necessário o consumo de suplementos alimentares. Os profissionais de Farmácia desempenham um papel importante na identificação de pacientes em risco. Objetivos: Analisar o consumo de tratamento preventivo ou corretivo em indiv...

  14. A battle lost? Report on two centuries of invasion and management of Lantana camara L. in Australia, India and South Africa.

    Science.gov (United States)

    Bhagwat, Shonil A; Breman, Elinor; Thekaekara, Tarsh; Thornton, Thomas F; Willis, Katherine J

    2012-01-01

    Recent discussion on invasive species has invigorated the debate on strategies to manage these species. Lantana camara L., a shrub native to the American tropics, has become one of the worst weeds in recorded history. In Australia, India and South Africa, Lantana has become very widespread occupying millions of hectares of land. Here, we examine historical records to reconstruct invasion and management of Lantana over two centuries and ask: Can we fight the spread of invasive species or do we need to develop strategies for their adaptive management? We carried out extensive research of historical records constituting over 75% of records on invasion and management of this species in the three countries. The records indicate that governments in Australia, India and South Africa have taken aggressive measures to eradicate Lantana over the last two centuries, but these efforts have been largely unsuccessful. We found that despite control measures, the invasion trajectory of Lantana has continued upwards and that post-war land-use change might have been a possible trigger for this spread. A large majority of studies on invasive species address timescales of less than one year; and even fewer address timescales of >10 years. An understanding of species invasions over long time-scales is of paramount importance. While archival records may give only a partial picture of the spread and management of invasive species, in the absence of any other long-term dataset on the ecology of Lantana, our study provides an important insight into its invasion, spread and management over two centuries and across three continents. While the established paradigm is to expend available resources on attempting to eradicate invasive species, our findings suggest that in the future, conservationists will need to develop strategies for their adaptive management rather than fighting a losing battle.

  15. A battle lost? Report on two centuries of invasion and management of Lantana camara L. in Australia, India and South Africa.

    Directory of Open Access Journals (Sweden)

    Shonil A Bhagwat

    Full Text Available Recent discussion on invasive species has invigorated the debate on strategies to manage these species. Lantana camara L., a shrub native to the American tropics, has become one of the worst weeds in recorded history. In Australia, India and South Africa, Lantana has become very widespread occupying millions of hectares of land. Here, we examine historical records to reconstruct invasion and management of Lantana over two centuries and ask: Can we fight the spread of invasive species or do we need to develop strategies for their adaptive management? We carried out extensive research of historical records constituting over 75% of records on invasion and management of this species in the three countries. The records indicate that governments in Australia, India and South Africa have taken aggressive measures to eradicate Lantana over the last two centuries, but these efforts have been largely unsuccessful. We found that despite control measures, the invasion trajectory of Lantana has continued upwards and that post-war land-use change might have been a possible trigger for this spread. A large majority of studies on invasive species address timescales of less than one year; and even fewer address timescales of >10 years. An understanding of species invasions over long time-scales is of paramount importance. While archival records may give only a partial picture of the spread and management of invasive species, in the absence of any other long-term dataset on the ecology of Lantana, our study provides an important insight into its invasion, spread and management over two centuries and across three continents. While the established paradigm is to expend available resources on attempting to eradicate invasive species, our findings suggest that in the future, conservationists will need to develop strategies for their adaptive management rather than fighting a losing battle.

  16. Potential distribution of an invasive species under climate change scenarios using CLIMEX and soil drainage: a case study of Lantana camara L. in Queensland, Australia.

    Science.gov (United States)

    Taylor, Subhashni; Kumar, Lalit

    2013-01-15

    Invasive species pose a major threat to biodiversity which may be intensified by the effects of climate change, particularly if favourable climate conditions allow invasives to spread to new areas. This research explores the combined effects of climate change and soil drainage on the potential future distribution of Lantana camara L. (lantana) in Queensland, Australia. Lantana is an invasive woody shrub species that has a profound economic and environmental impact worldwide. CLIMEX was used to develop a process-based niche model of lantana to estimate its potential distribution under current and future climate. Two Global Climate Models (GCMs), CSIRO-Mk3.0 and MIROC-H, were used to explore the impacts of climate change. These models were run with the A1B and A2 scenarios for 2030, 2070 and 2100. Further refinements of the potential distributions were carried out through the integration of fine scale soil drainage data in a Geographic Information System (GIS). The results from both GCMs show a progressive reduction in climatic suitability for lantana in Queensland. The MIROC-H projects a larger area as remaining at risk of lantana invasion in 2100 compared to CSIRO-Mk3.0. Inclusion of soil drainage data results in a more refined distribution. Overall results show a dramatic reduction in potential distribution of lantana in Queensland in the long term (2100). However, in the short term (2030), areas such as South East Queensland and the Wet Tropics, both regions of significant ecological importance, remain at risk of invasion consistently under both GCMs and with both the climate only and climate and soil drainage models. Management of lantana in these regions will need to be prioritized to protect environmental assets of ecological significance. Copyright © 2012 Elsevier Ltd. All rights reserved.

  17. 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.

  18. Analise da correlação entre o tono muscular, força muscular e as funções motoras em crianças com paralisia cerebral tetraparetica espastica devido a lesões hipoxico- isquemicas

    OpenAIRE

    Cristina Iwabe

    2003-01-01

    Resumo: A paralisia cerebral (PC) é um quadro clínico geralmente conseqüente à agressão não progressiva do cérebro em desenvolvimento, caracterizando-se por alterações do tono, força muscular e função motora. O objetivo deste estudo foi analisar a interferência do tono e força muscular nas funções motoras em crianças com paralisia cerebral tetraparética (pC-T) espástica devido a lesões hipóxico-isquêmicas (LHI). Foram avaliadas 15 crianças com diagnóstico de PC-T espástica na faixa etária de ...

  19. Avaliação microscópica da resposta do complexo dentino-pulpar de dentes de cães ao agregado de trióxido mineral, cimento portland e cimento portland branco após pulpotomia

    OpenAIRE

    Renato Menezes da Silva

    2003-01-01

    A idéia de se proteger e manter a vitalidade pulpar não é recente. Vários materiais têm sido preconizados com tal finalidade, no entanto, nenhum ainda pode ser considerado o material ideal, por este motivo compreende-se a importância e o interesse sempre crescente pela evolução dos estudos em torno deste assunto. Levando-se em consideração alguns relatos sobre a semelhança de composição química entre o agregado trióxido mineral (MTA) e o cimento de Portland, foi objetivo deste estudo desenvol...

  20. 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

  1. Detecção de microrganismos, quantificação de endotoxinas e avaliação in vivo do extrato glicólico de própolis em dentes com necrose pulpar e lesão periapical

    OpenAIRE

    Xavier, Ana Claudia Carvalho [UNESP

    2011-01-01

    Este estudo avaliou in vivo a ação do extrato glicólico de própolis 12%, como substância química auxiliar em tratamentos endodônticos de dentes com necrose pulpar e lesão periapical. A avaliação foi realizada através da cultura e detecção de microrganismos por Reação em Cadeia Polimerase (PCR) e da quantificação de endotoxinas. Além disso, foi avaliada a correlação entre o tamanho da lesão periapical e a quantidade de endotoxinas presente. Foram selecionados 30 dentes, os quais foram dividido...

  2. Prevalence of microorganisms in root canals of human deciduous teeth with necrotic pulp and chronic periapical lesions Prevalência de microrganismos em canais radiculares de dentes decíduos de humanos com necrose pulpar e lesão periapical crônica

    Directory of Open Access Journals (Sweden)

    Luciana Cunha Pazelli

    2003-12-01

    Full Text Available The objective of this study was to evaluate bacterial prevalence in 31 root canals of human deciduous teeth with necrotic pulp and periapical lesions using bacterial culture. After crown access, the material was collected using absorbent paper points for microbiological evaluation and determination of colony forming units (CFU. Anaerobic microorganisms were found in 96.7% of the samples, black-pigmented bacilli in 35.5%, aerobic microorganisms in 93.5%, streptococci in 96.7%, and S. mutans in 48.4%. We concluded that in human deciduous teeth root canals with necrotic pulp and periapical lesions the infection is polymicrobial, with a large number of microorganisms and a predominance of streptococci and anaerobic microorganisms.O objetivo deste estudo foi avaliar, por meio de cultura bacteriológica, a prevalência de microorganismos em 31 canais radiculares de dentes decíduos humanos com necrose pulpar e lesão periapical. O material, colhido dos canais radiculares após a realização da cirurgia de acesso, foi submetido ao processamento microbiológico para a determinação das unidades formadoras de colônia de microorganismos. Os resultados mostram que os microorganismos anaeróbios foram quantificados em 96,7% dos casos, os bacilos pigmentados de negro (BPB em 35,5%, os aeróbios em 93,5%, os estreptococos em 96,7% e os S. mutans em 48,4%. Assim, pôde-se concluir que a infecção em canais radiculares de dentes decíduos humanos portadores de necrose pulpar e lesão periapical é polimicrobiana, com grande quantidade de microorganismos e maior prevalência de estreptococos e microorganismos anaeróbios.

  3. Insuficiencia renal aguda devido a rabdomiolise

    National Research Council Canada - National Science Library

    Cabral, Guilherme Gomide; Monice, Leticia Mattar; Machado, Lorena Rocha Dias; Caldeira, Luana Modesto Lopes; Silva, Lucas Roquim e; Couto, Hudson de Araujo

    2012-01-01

    Physical activities are important to any individual's health, but, when held in inappropriate conditions, based on very violent exercises, rhabdomyolysis can occur, being one of its consequences, acute renal failure (ARF...

  4. 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

  5. Chemical treatment to unclogg dripper irrigation systems due to biological problems Desentupimento de um sistema de irrigação por gotejamento devido a problema de origem biológica

    Directory of Open Access Journals (Sweden)

    Túlio Assunção Pires Ribeiro

    2008-02-01

    Full Text Available Many producers use drippers for trickle irrigation systems for flower production in the field and in protected environments. A frequent problem in this type of irrigation system is the clogging of drippers, which is directly related to water quality and filtering system efficiency. The objective of this study was to conduct an experimental investigation to evaluate the efficiency of using nitric acid and sodium hypochlorite to unclogg drippers due to the use of water with high algae content. The evaluation was conducted in six, 4216 m² greenhouses, each with two sectors comprised of ten spaces or lines, totaling 12 sectors of a dripper irrigation system in a rose producing property of Holambra, State of SP, Brazil. Chemical and physical analyses and the bacteriological count in water were carried out in the three water sources that supply the irrigation system to check the factors causing the clogging. Evaluations were carried out on water distribution uniformity in all sectors before and after chemical treatment in order to evaluate efficiency. The treatment improved water distribution uniformity and a lead to a reduction in the coefficient of variation (CV for dripper flow in all sectors. There was a good correlation between CV and the water distribution uniformity index. Therefore, this is an excellent method to be used to unclogg drippers due to biological problems.Muitos produtores usam gotejadores para irrigação localizada em produção de flores no campo e em ambientes protegidos. Um problema freqüente neste tipo de irrigação é o entupimento dos gotejadores, que está diretamente relacionado à qualidade da água e à deficiência de filtração do sistema. Este trabalho teve como objetivo fazer uma investigação experimental para avaliar a eficiência da utilização de ácido nítrico e de hipoclorito de sódio na desobstrução de gotejadores entupidos, devido à utilização de águas com elevado teor de matéria de origem

  6. Pigmentary retinopathy due to Bardet-Biedl syndrome: case report and literature review Retinopatia pigmentar devido a síndrome de Bardet-Biedl: relato de caso e revisão da literatura

    Directory of Open Access Journals (Sweden)

    Luis Jesuino de Oliveira Andrade

    2009-10-01

    Full Text Available Bardet-Biedl syndrome (BBS is a rare autosomal recessive disorder with clinical and genetic heterogeneity. This syndrome was first described by Laurence and Moon in 1866 and additional cases were described by Bardet and Biedl between 1920 and 1922. The main features are obesity, polydactyly, pigmentary retinopathy, learning disabilities, various degrees of intellectual impairment, hypogonadism, and renal abnormalities. Bardet-Biedl syndrome is both phenotypically and genetically heterogeneous. Clinical diagnosis is based on the presence of 4 of the 5 cardinal features. The authors present a typical case of pigmentary retinopathy due to Bardet-Biedl syndrome and made a brief commentary about the disease's cardinal manifestations.A síndrome de Bardet-Biedl (BBS é uma desordem autossômica recessiva rara, com heterogeneidade clínica e genética. Esta síndrome foi descrita pela primeira vez por Laurence e Moon em 1866 e outros casos foram descritos por Bardet e Biedl entre 1920 e 1922. As principais características são obesidade, polidactilia, retinopatia pigmentar, dificuldades de aprendizagem, graus de deficiência intelectual diversos, hipogonadismo e anomalias renais. Síndrome de Bardet-Biedl é fenotipicamente e geneticamente heterogêneos. O diagnóstico clínico baseia-se na presença de quatro dos cinco sinais principais da síndrome. Os autores apresentam um caso típico de retinopatia pigmentar devido à síndrome de Bardet-Biedl e fazem uma breve revisão sobre as manifestações da síndrome com especial atenção à retinopatia pigmentar.

  7. 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

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

    Directory of Open Access Journals (Sweden)

    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.

  9. Influence of temperature, photoperiod and humidity on oviposition and egg hatch of the root-feeding flea beetle Longitarsus bethae (Chrysomelidae: Alticinae), a natural enemy of the weed Lantana camara (Verbenaceae).

    Science.gov (United States)

    Simelane, D O

    2007-04-01

    The root-feeding flea beetle Longitarsus bethae Savini & Escalona, was introduced into South Africa as a candidate biological control agent for the noxious and invasive weed, Lantana camara L. As part of the study to predict the beetles' survival in its new range, the influence of climatic conditions on its egg development and reproductive performance were investigated in the laboratory. The threshold temperature (T degrees) and degree-days (DD) required for egg hatch were determined after exposing the eggs to various constant temperatures (12, 17, 22, 27 and 32 degrees C) in separate growth chambers. The DD required for egg hatch was 178.6, and the temperature threshold required for egg hatch was 11.3 degrees C. Survival of eggs varied from 27 to 56% at 32 and 17 degrees C, respectively, and was optimum between 17 and 25 degrees C. Oviposition was examined under high and low relative humidity (RH) regimes while egg hatch was determined at six RH levels, each maintained in a separate controlled growth chamber set at a constant temperature (25 degrees C). Whilst RH had no influence on oviposition, eggs were highly susceptible to aridity, and continuous exposure to relative humidity below 63% for more than three days was wholly lethal at 25 degrees C. Optimum egg hatch occurred at RH between 85 and 95% for up to 12 days. The effect of day length on oviposition and subsequent egg hatch was investigated under two photoperiod regimes. Neither oviposition nor subsequent egg hatch was influenced by photoperiod. The knowledge obtained will be useful for mass rearing as well as field release programmes for L. bethae.

  10. Influence of soil texture, moisture, and surface cracks on the performance of a root-feeding flea beetle, Longitarsus bethae (Coleoptera: Chrysomelidae), a biological control agent for Lantana camara (Verbenaceae).

    Science.gov (United States)

    Simelane, David O

    2007-06-01

    Laboratory studies were conducted to determine the influence of soil texture, moisture and surface cracks on adult preference and survival of the root-feeding flea beetle, Longitarsus bethae Savini and Escalona (Coleoptera: Chrysomelidae), a natural enemy of the weed, Lantana camara L. (Verbenaceae). Adult feeding, oviposition preference, and survival of the immature stages of L. bethae were examined at four soil textures (clayey, silty loam, sandy loam, and sandy soil), three soil moisture levels (low, moderate, and high), and two soil surface conditions (with or without surface cracks). Both soil texture and moisture had no influence on leaf feeding and colonization by adult L. bethae. Soil texture had a significant influence on oviposition, with adults preferring to lay on clayey and sandy soils to silty or sandy loam soils. However, survival to adulthood was significantly higher in clayey soils than in other soil textures. There was a tendency for females to deposit more eggs at greater depth in both clayey and sandy soils than in other soil textures. Although oviposition preference and depth of oviposition were not influenced by soil moisture, survival in moderately moist soils was significantly higher than in other moisture levels. Development of immature stages in high soil moisture levels was significantly slower than in other soil moisture levels. There were no variations in the body size of beetles that emerged from different soil textures and moisture levels. Females laid almost three times more eggs on cracked than on noncracked soils. It is predicted that clayey and moderately moist soils will favor the survival of L. bethae, and under these conditions, damage to the roots is likely to be high. This information will aid in the selection of suitable release sites where L. bethae would be most likely to become established.

  11. 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

    Directory of Open Access Journals (Sweden)

    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.

  12. Histologia e fisiologia da dor de origem pulpar

    OpenAIRE

    Fernandes, Bruno Miguel Oliveira

    2015-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária Na prática clínica dentária é comum observar que um grande número de pacientes que solicitam uma consulta sem agendamento se deve a uma urgência ou emergência. Normalmente, esses pacientes chegam de maneira inesperada e com dores severas, alterando a rotina da agenda do dentista e, simultaneamente, criando situações de tensão que afe...

  13. Células madres pulpares: describiendo y descubriendo potencialidades

    OpenAIRE

    Merino, Graciela Mónica; Dewey, Ricardo Alfredo; Mayocchi, Karina; Butler, Teresa Adela; Dorati, Pablo; Basal, Roxana Lía; Paggi, Ricardo; Cantarini, Luis Martín; Pinola, Lidia; Micinquevich, Susana

    2015-01-01

    La evidencia científica ha demostrado que las células madre (CM) ofrecen una importante innovación en la investigación odontológica. Ellas pueden diferenciarse posibilitando el reemplazo de tejidos afectados aunque sean de otros linajes celulares. Las de origen dental por su multipotencialidad pueden formar células con carácter osteo/odontogénico, adipogénico y neurogénico. La pulpa dental ofrece células madre en baja concentración, siendo más proliferativas aquellas que dan origen a la coron...

  14. Laser Doppler flowmeter e o diagnóstico pulpar.

    OpenAIRE

    Pisterna, Gabriela

    2003-01-01

    Recibido: Junio 2003 Aceptado: Agosto 2003 A sofisticação da tecnologia disponível pelos clínicos atuais apoia a solidez dos procedimentos diagnósticos. Apesar disso esta tecnologia não varia a natureza fundamental do diagnóstico como processo de escuta ativa, observação precisa e curiosidade genuína sobre a fonte dos signos e sintomas presentes.

  15. Sensibilidade pulpar em pacientes geriátricos

    OpenAIRE

    Santos, Alexandra Ariana Fernandes dos

    2015-01-01

    Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz Em virtude do aumento da expetativa de vida da população, o número de pacientes geriátricos tem aumentado, proporcionalmente. A necessidade de evolução na prevenção, no diagnóstico e no tratamento da saúde oral no idoso, torna-se premente. Além das mudanças decorrentes do processo natural do envelhecimento, há alterações sistémicas, psicológicas e físicas a salientar. Com o envelhecimento, ...

  16. Laser doppler flowmeter y el diagnóstico pulpar

    OpenAIRE

    Pisterna, Gabriela

    2003-01-01

    Recibido: Junio 2003 Aceptado: Agosto 2003 La sofisticación de la tecnología disponible por los clínicos actuales apoya la solidez de los procedimientos diagnósticos. Sin embargo esta tecnología no varía la naturaleza fundamental del diagnóstico como un proceso de escucha activa, observación precisa y curiosidad genuina sobre la fuente de los signos y síntomas presentes.

  17. 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

    Directory of Open Access Journals (Sweden)

    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.

  18. 1701-IJBCS-Article-Camara Mameri

    African Journals Online (AJOL)

    hp

    Trois antécédents culturaux, constitués par le soja, le niébé et le riz ont été mis en place, selon un dispositif en bloc de Fisher, en première année. A partir de la deuxième année, une jachère naturelle de 3 ans a été ajoutée aux trois premiers antécédents. Le riz (NERICA1) a été semé sur les quatre antécédents et 4.

  19. Tensão devido ao papel de cuidador entre cuidadores de crianças com câncer Tensión debido al rol de cuidador entre cuidadores de niños con cáncer Caregiver role strain in caregivers of children with cancer

    Directory of Open Access Journals (Sweden)

    Ana Raquel Medeiros Beck

    2007-10-01

    Full Text Available Pretendeu-se identificar a freqüência do diagnóstico de enfermagem `tensão devido ao papel do cuidador' e `risco para tensão devida ao papel do cuidador', entre 50 cuidadores de crianças portadoras de câncer, num hospital infantil especializado em doenças onco-hematológicas de Campinas, SP. O estudo foi transversal e descritivo, os dados foram coletados por meio do prontuário e de entrevista com o cuidador, utilizando-se formulário próprio. Apresentaram `tensão devido ao papel de cuidador 78% dos cuidadores e 100% tinham risco para tensão devida ao papel de cuidador, com a presença de, no mínimo, duas características definidoras e seis fatores de risco'. Conclui-se que os cuidadores de crianças com câncer têm alto risco para tensão devida ao papel de cuidador.Se pretendió identificar la frecuencia del diagnóstico de enfermería: `tensión debido al rol de cuidador' y `riesgo de tensión debida al papel de cuidador', entre 50 cuidadores de niños portadores de cáncer, en un hospital infantil especializado en enfermedades onco-hematológicas de Campinas, SP, Brasil. El estudio fué transversal y descriptivo, los datos fueron recogidos por medio de la ficha de la entrevista con el cuidador, utilizandose un formulario apropiado. Presentaron `tensión debida al papel del cuidador' 78% de los cuidadores, y 100% corrían riesgo de `tensión debido al rol de cuidador', con la presencia mínima de 2 características definidoras y 6 factores de riesgo. Se concluye que los cuidadores de niños con cáncer corren alto riesgo de tensión debida al papel de cuidadador'.The purpose of this study was to identify the frequency of nursing diagnoses "caregiver role strain" and "risk for caregiver role strain" in 50 caregivers of children with cancer in a specialized children's cancer hospital in Campinas, São Paulo. The data for this descriptive cross-sectional study was obtained from the patients' files and interviews held with the

  20. 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

    Directory of Open Access Journals (Sweden)

    Ernesto Dallaverde Neto

    2011-10-01

    Full Text Available 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 como as patologias associadas às infecções causadas por esse microrganismo de interesse para o reumatologista, e a possível implicação da reação da articulação ao ácido hialurônico como possível fator predisponente do derrame articular.Monoarthritis remains a diagnostic challenge in Rheumatology and Orthopedics. The author reports a case of septic arthritis due to Streptococcus bovis after several episodes of joint effusion treated with hyaluronic acid (Hylan G-F 20 and methylprednisolone acetate in a 69-year-old patient with liver cirrhosis due to hepatitis C virus. Neither adenoma of the colon nor endocarditis was present. The diagnostic possibilities for this case of monoarthritis, the pathologies related to the microorganism of interest to the rheumatologist, and the possible involvement of joint reaction to hyaluronic acid as a predisposing factor to joint effusion are discussed.

  1. 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

    Directory of Open Access Journals (Sweden)

    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

  2. Liver transplantion in a patient with rapid onset parkinsonism-dementia complex induced by manganism secondary to liver failure Transplante hepático em um paciente com complexo parkinsonismo-demência rapidamente progressivo induzido por manganismo devido a insuficiência hepática

    Directory of Open Access Journals (Sweden)

    Giorgio Fabiani

    2007-09-01

    Full Text Available Bilateral and symmetric globus-pallidus hyperintensities are observed on T1-weighted MRI in most of the patients with chronic liver failure, due to manganese accumulation. We report a 53-year-old man, with rapid onset parkinsonism-dementia complex associated with accumulation of manganese in the brain, secondary to liver failure. A brain MRI was performed and a high signal on T1-weighted images was seen on globus-pallidus, as well as on T2-weighted images on the hemispheric white-matter. He was referred to a liver-transplantation. The patient passed away on the seventh postoperative day. Our findings support the concept of the toxic effects of manganese on the globus-pallidus. The treatment of this form of parkinsonism is controversial and liver-transplantation should not be considered as first line treatment but as an alternative one.Hiperintesidades simétricas e bilaterais dos gânglios da base são observadas em imagens de ressonância magnética encefálica (RM ponderadas em T1 na maioria dos pacientes com insuficiência hepática crônica devidas ao acúmulo de manganês. Nós relatamos o caso de um homem, com 53 anos de idade, com um complexo parkinsonismo-demência rapidamente progressivo associado com o acúmulo de manganês no cérebro, secundariamente a insuficiência hepática. Uma RM encefálica foi realizada e foram observadas imagens hiperintensas/hipersinal nas imagens ponderadas em T1 no globo pálido e, também, na substância branca dos hemisférios cerebrais ponderadas em T2. Devido à falta de resposta ao tratamento clinico optamos pelo transplante hepático. O paciente faleceu no 7º dia de PO. Nossos achados corroboram o conceito dos efeitos tóxicos do manganês nos gânglios da base/globo pálido. O tratamento desta forma de parkinsonismo é controverso e o transplante hepático não deverá ser considerada uma opção terapêutica de primeira linha, porém como um tratamento alternativo considerando-se os riscos

  3. Avaliação e efeito da compactação do solo, devido à freqüência de tráfego, na produção de madeira de eucalipto Evaluation and effect of soil compaction due to traffic frequency on Eucalyptus wood production

    Directory of Open Access Journals (Sweden)

    Fernando Seixas

    2007-12-01

    Full Text Available A compactação do solo devido ao tráfego de máquinas de colheita de madeira, assim como a extensão da área impactada, constitui fator de preocupação, em virtude da possibilidade de efeitos prejudiciais para o crescimento da floresta. O objetivo deste trabalho foi avaliar os efeitos da freqüência de tráfego de um trator mais carreta na compactação do solo e na produtividade de um plantio de Eucalyptus grandis, no final da primeira rotação de sete anos. A compactação do solo, avaliada por meio da densidade e resistência à penetração, foi determinada para tratamentos com 1, 3, 5, 10 e 20 passadas do veículo carregado com 12,5 estéreos de madeira, com peso total de oito toneladas, além de uma testemunha sem a ocorrência de tráfego. Após as cinco primeiras passadas ocorreram cerca de 80% do adensamento total do solo, resultante das 20 passadas, sendo recomendado restringir o tráfego de veículos dentro do talhão na menor área possível, diminuindo-se a extensão de possíveis efeitos da compactação sobre o povoamento florestal. Contudo, nessa situação em particular a compactação do solo não prejudicou o crescimento das árvores em nenhum dos tratamentos avaliados.Soil compaction resulting from forestry machine traffic may reduce forest production. The objective of this study was to evaluate the influence of traffic frequency on soil compaction and Eucalyptus grandis forest productivity after a seven-year rotation. Soil bulk density and cone penetrometer resistance measurements were used as indicators to evaluate soil compaction resulting from tractor plus trailer traffic, a total of 8 tons load, after 1, 3, 5, 10, 20 vehicle passes and a control with no traffic. Around 80% of total soil compaction after 20 vehicle passes resulted after the first five vehicle passes, with no significant change after that. This indicates the necessity to restrict vehicle traffic to smaller areas in the forest, even with that area

  4. 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

    Directory of Open Access Journals (Sweden)

    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

  5. 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

  6. Lantana camara L. (Verbenaceae) invasion along streams in a ...

    Indian Academy of Sciences (India)

    2014-07-16

    Jul 16, 2014 ... 1Centre for Ecological Sciences and 2Divecha Centre for Climate Change, Indian Institute of Science,. Bangalore 560 ..... lantana would aid managers to identify high-risk zones that should be monitored intensively and receive targeted management. We conclude that a heterogeneous land- scape offers a ...

  7. Allelopathic Effects of Lantana (Lantana camara L.) Leaf Extracts on ...

    African Journals Online (AJOL)

    Bheema

    leaf litter (May and Ash, 1990). The report from Hussain et al. (2011), for example, showed strong allelopathic effects of aqueous extracts of all parts of lantana on the test species while the soil collected underneath lantana thickets had no allelopathic effects. 5. CONCLUSION. The results of the study showed allelopathic ...

  8. Lantana camara L.(Verbenaceae) invasion along streams in a ...

    Indian Academy of Sciences (India)

    Verbenaceae) ... 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.

  9. 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.

  10. Impacts of climate change on invasive Lantana camara L ...

    African Journals Online (AJOL)

    staylor

    the overwhelming evidence for rapid climate change effects (IPCC, 2007), it is essential to consider the ..... to the long term threat and undertake on-going monitoring of the identified areas. In such instances, the. Year. CSIRO-Mk3.0. MIROC-H. A1B. A2. A1B. A2. 2030. (a). (b). (c). (d). 2070. (e). (f). (g). (h). 2100. (i). (j). (k). (l) ...

  11. Allelopathic Effects of Lantana (Lantana camara L.) Leaf Extracts on ...

    African Journals Online (AJOL)

    Bheema

    many plant species (Sahid and Sugau, 1993; Gentle and Duggin, 1997; Sharma et al., 2005;. Ahmed et al., 2007). Lantana can also interfere growth of nearby plants by outcompeting for soil nutrients (Dobhal, et al., 2010) and altering microenvironment (e.g. light, temperature) by forming dense thickets (Sharma and ...

  12. Effect of Insecticidal Plant Materials, Lantana camara L. and ...

    African Journals Online (AJOL)

    The effect of ground powders of two tropical plants, Lantana camam L. and Tephrosia vogelii Hook, on the level of insect damage and ... lesser rate with high concentration and had no effect on the percent germination of maize grains when compared to the controls. .... white/ yellow to light brown. 3.Moderate change (>5 to ...

  13. C:\\Users\\AISA\\Desktop\\M. CAMARA.xps

    African Journals Online (AJOL)

    AISA

    entre le vieillissement précoce des cacaoyers et les caractéristiques morphopédologiques dans le Sud-Ouest de la Côte d'Ivoire. Journal of Applied. Biosciences 24 : 1508 - 1519. Konaté Z. 2008. Etude comparative des pratiques paysannes de plantation ou de replantation cacaoyère en Côte d'Ivoire. Mémoire de DEA.

  14. Lantana camara berry for the synthesis of silver nanoparticles

    Directory of Open Access Journals (Sweden)

    Brajesh Kumar

    2015-03-01

    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.

  15. 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

  16. Hemorragia digestiva baixa devido a melanoma maligno metastático

    Directory of Open Access Journals (Sweden)

    Orlando Ribeiro Prado Filho

    Full Text Available A case of lower gastrointestinal bleeding due to metastatic malignant melanoma in a man, in which the final diagnosis was made only on surgery, is reported. The patient underwent a segmentary enterectomy with primary anastomosis and he was discharged on tenth postoperative day.

  17. Metodología para estudios histológicos pulpares en ratas

    OpenAIRE

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

    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...

  18. Conservación de la vitalidad pulpar en piezas autotransplantadas

    OpenAIRE

    Pineda Mejia, Martha Elena; Profesora del Dpto: Estomatología Rehabilitadora Fac. Odontología. UNMSM.; Silva Infantes, Manuel; Prof. del Dpto: Estomatología Medico Quirúrgica. Fae. Odontología. UNMSM.; Sáenz Quíroz, Lizardo Augusto; Prof. del Dpto: Estomatología Medico Quirúrgica. Fae. Odontología. UNMSM.; Cheín Villacampa, Sylvia; Profesora del Dpto: Estomatología Biosocial. Fac Odontología. UNMSM.; Palacios Alva, Elmo; Prof. del Dpto: Estomatología Medico Quirúrgica. Fae. Odontología. UNMSM.

    2014-01-01

    To carry out this investigation, eight patients 15 to 21 years old of Central Clinic of UNMSM Dentistry Faculty who had the indication for. first permanent molar extraction and at the same time had a third molar germ in eruption, were selected. The germ was at least in a Nolla development stage 7, 8 ó 9. Having the patient´s respective consent they underwent the autotransplantation of the germ to the socket of the first molar within the same quadrant. Cases were followed for a 12 weeks perio...

  19. Respuesta pulpar a materiales de restauración tipo resina

    OpenAIRE

    Ayala Quito, Ángel Geovanny

    2016-01-01

    Las resinas compuestas y adhesivos dentales se utilizan ampliamente para la restauración de dientes con pulpas vitales. La preferencia en el uso de estas resinas compuestas podría estar atribuida a que son materiales con buenos resultados estéticos y se consideran materiales de restauración estables. Sin embargo se ha demostrado que son susceptibles a la degradación y liberación de la fracción de sus componentes y que cierta cantidad de los monómeros de su composición permanecen sin polime...

  20. 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.

  1. 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.

  2. Tratamento de revitalização pulpar em dentes permanentes jovens com rizogênese incompleta

    OpenAIRE

    Ednaldo de Jesus Filho

    2013-01-01

    Hipótese do estudo: acredita-se que a presença de células tronco, matriz protéica e fatores de crescimento em um canal descontaminado pode estimular a continuidade da formação radicular em dentes com rizogênese incompleta que sofreram necrose por trauma ou pelo avanço de lesão de cárie. Objetivos: o objetivo deste estudo foi realizar uma revisão de literatura e avaliar a continuidade da rizogênese e regressão da lesão periapical em raízes de dentes necrosados, submetidos ao tratamento de revi...

  3. 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)

  4. 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.

  5. Rover mast calibration, exact camera pointing, and camara handoff for visual target tracking

    Science.gov (United States)

    Kim, Won S.; Ansar, Adnan I.; Steele, Robert D.

    2005-01-01

    This paper presents three technical elements that we have developed to improve the accuracy of the visual target tracking for single-sol approach-and-instrument placement in future Mars rover missions. An accurate, straightforward method of rover mast calibration is achieved by using a total station, a camera calibration target, and four prism targets mounted on the rover. The method was applied to Rocky8 rover mast calibration and yielded a 1.1-pixel rms residual error. Camera pointing requires inverse kinematic solutions for mast pan and tilt angles such that the target image appears right at the center of the camera image. Two issues were raised. Mast camera frames are in general not parallel to the masthead base frame. Further, the optical axis of the camera model in general does not pass through the center of the image. Despite these issues, we managed to derive non-iterative closed-form exact solutions, which were verified with Matlab routines. Actual camera pointing experiments aver 50 random target image paints yielded less than 1.3-pixel rms pointing error. Finally, a purely geometric method for camera handoff using stereo views of the target has been developed. Experimental test runs show less than 2.5 pixels error on high-resolution Navcam for Pancam-to-Navcam handoff, and less than 4 pixels error on lower-resolution Hazcam for Navcam-to-Hazcam handoff.

  6. 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)

  7. Screening antimycobacterial activity of Baccharis dracunculifolia, Centella asiatica, Lantana camara and Pterodon emarginatus

    Directory of Open Access Journals (Sweden)

    R.R.P. MACHADO

    2015-01-01

    Full Text Available ABSTRACT The permanent investigation of new antimycobacterial drugs is necessary for the eradication programs of tuberculosis and other mycobacterium-related diseases. The aim of the present study is to search for new sources of antimycobacterial drugs using plant materials. In this study, 11 plant materials (extracts, essential oils and some fractions obtained from 4 species of medicinal plants traditionally used as general therapeutics for different illnesses and specifically as treatment of tuberculosis, were evaluated using the microplate resazurin assay against 2 species of the Mycobacterium tuberculosis Complex and 3 nontuberculous mycobacteria. The results showed the hexane extract and the essential oil from fruits of Pterodonemarginatus (Vogel as potential sources of antimycobacterial drugs against 4 species of tested mycobacteria. The hexane fraction of methanol extract from leaves of Centella asiatica also presented significant mycobacterial growth inhibition, but against M. chelonae only. In conclusion, it was possible to contribute to the antimycobacterial investigations by presenting three new samples of plants with significant antimicrobial activity against four Mycobacteriumspp and suggest future studies about the antimycobacterial properties of fruits from P. emarginatus.

  8. 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)

  9. Evaluation and monitoring of a darkroom; Monitoramento e avaliacao de uma camara escura

    Energy Technology Data Exchange (ETDEWEB)

    Bramati, I.E.; Bacelar, A.; Pinto, A.L.A.; Lima, A.A.; Jacques, L.C.B.C.; Nied, L. [Hospital das Clinicas, Porto Alegre, RS (Brazil). Grupo de Pesquisa e Pos-graduacao em Fisica Medica

    1996-12-31

    Basic tests (light, temperature, humidity) to check the darkroom`s integrity and performance are proposed in order to express its true conditions. A complete description of the chambers is carried out. A periodical evaluation of working conditions of the chamber is suggested to meet the radiologic protection rules 4 refs.

  10. Efeito da redução do aporte nutricional na diversidade genotípica e nos fatores de virulência de bactérias cariogênicas isoladas de dentina cariada selada

    OpenAIRE

    Nailê Damé-Teixeira

    2015-01-01

    No tratamento de lesões profundas de cárie, a Remoção Parcial de Dentina Cariada (RPDC) e restauração tem sido proposta como alternativa conservadora para evitar perda de tecido dentário e exposição pulpar. Existe uma hipótese de que uma seleção de bactérias ocorre abaixo de restaurações devido a um acesso limitado de nutrientes. No entanto, há falta de conhecimento sobre a diversidade e potencial de virulência das bactérias cariogênicas residuais seladas abaixo de restaurações sobre dentina ...

  11. 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)

  12. 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.

  13. Pseudomicetoma dermatofítico: relato de um caso devido a Trichophyton tonsurans Dermatophytic pseudomycetoma: report of a case caused by Trichophyton tonsurans

    Directory of Open Access Journals (Sweden)

    Mário A.P. Moraes

    2001-06-01

    Full Text Available É descrito um caso de pseudomicetoma dermatofítico, recidivante, em paciente com lesões no couro cabeludo. O exame histopatológico de uma das lesões mostrou, nos tecidos, os agregados micelianos ou pseudogrânulos, característicos da enfermidade. Dos tecidos frescos de outras lesões foi isolado o dermatófito Trichophyton tonsurans. Exames micológicos adicionais falharam em demonstrar a existência de tinea capitis, possível fonte do pseudomicetoma. A raridade dessa forma de dermatofitose profunda justifica a presente publicação.A case of dermatophytic pseudomycetoma, in a patient with a history of recurrent lesions in the scalp, for over two years, is reported. Histopathological examination of the affected tissues revealed the mycelial aggregates or pseudogranules characteristic of the disease. Cultures of fresh tissues samples detected a fungus identified as Trichophyton tonsurans. Additional examinations failed to demonstrate lesions of tinea capitis, a probable source of the deep infection. Dermatophytic pseudomycetoma is an extremely rare form of dermatophytosis, and the rarity of such cases is the motive for the present communication.

  14. Direito à informação: requisito do devido processo legal em um Estado democrático de Direito

    Directory of Open Access Journals (Sweden)

    Carmen Sílvia Lima de Arruda

    2016-11-01

    Full Text Available In this paper, we will seek to demonstrate how the "Right to Information", universally enshrined as a human right and, in particular, by the Inter-American Convention on Human Rights, incorporated into the Brazilian Constitution as one of the individual guarantees of citizens, has become a requirement of due Legal process, and foundation of democracy, allowing the insertion of a Rule of Law in the international community in a globalized world. Believing that only after the broad access to information regarding the administrative agents' action it will be possible to achieve the right to ample defense and contradictory, grounds of the framework of due administrative legal process, all duly elected as individual guarantees by the Constituent Assembly. Brazilian law, especially Law 12.527/2011, which regulates access to information, will be compared with the US legislation, highlighting the Freedom of Information Act, published at the beginning of President Barack Obama's administration, which starts from the principle of reliability through the transparency of government actions, with a strong presumption in favour of full disclosure. We will also try to study the hypotheses of an exception to the right of access to information and the extension of exegesis. Finally, a current panorama of Brazilian and North American jurisprudence will be presented on the subject, and the Inter-American Court of Human Rights Access to information as a due process requirement.

  15. Desenvolvimento de metodologias para avaliação da exposição ocupacional interna devido ao radiofármaco 18FDG

    OpenAIRE

    Lacerda, Isabelle Viviane Batista de

    2013-01-01

    A produção do 18F tem crescido na última década. Ele é produzido basicamente para a síntese do 18F-fluordeoxiglicose (18FDG), principal radiofármaco utilizado em exames PET (Positron Emission Tomography). O crescimento na frequência de realização destes exames resultou em aumento do número de indivíduos ocupacionalmente expostos (IOE) ao radionuclídeo 18F na forma de 18FDG, elevando-se, desta forma, a probabilidade de incorporação acidental do mesmo. Este trabalho teve como ...

  16. 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.

  17. AvaliaÃÃo da fragilidade mandibular ao trauma devido à presenÃa de terceiros molares: Uma anÃlise tridimensional com elementos finitos

    OpenAIRE

    TÃcio Pinheiro Bezerra

    2012-01-01

    O Ãngulo mandibular tem sido descrito como uma Ãrea frÃgil e, acredita-se que, com a presenÃa do terceiro molar, a mandÃbula perde parte de sua estrutura para abrigar tecidos que nÃo contribuem para sua resistÃncia estrutural. Neste contexto, o artigo produzido nessa tese teve como objetivo identificar Ãreas de concentraÃÃo e distribuiÃÃo de estresse na regiÃo do Ãngulo em uma mandÃbula portando os dois terceiros molares erupcionados, outra portando apenas um terceiro molar erupcionado e outr...

  18. Signos y sintomas clinicos predoctores de cicatrizacion apical 12 meses despues de microcirugia endodontica.(DOSSIER ENDODONCIA, TERAPIA PULPAR MODERNA Y REVOLUCIONARIA)

    National Research Council Canada - National Science Library

    Marin Zuluaga, Dairo Javier; Martinez Agudelo, Patricia; Garcia Guerrero, Claudia Carmina; Suarez Rueda, Luis Carlos

    2015-01-01

    Objetivo: Analizar la presencia de dolor espontaneo/dolor a la percusion pre y posquirurgicos, como predictores de la cicatrizacion periapical 12 meses despues de microcirugia endodontica (ME). Metodos...

  19. 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

  20. Browse Author Index

    African Journals Online (AJOL)

    Items 1 - 50 of 360 ... Camara, Diankanagbe · Camara, M · Camara, Marième · Camara, Massaman · Camara, Souleymane · Camiletti-Moirón, Daniel · Campinha-Bacote, Nia · Can, A · Can, Fatma · Canakci, Selcuk Eren · Cariou, G · Carter, Jane · Cassidy, Emma Louise · Cavin, Bekolo · Céline, Bambara · Cerf, Dominique

  1. SEM - Morphological evaluation of the root apex in human primary teeth with different degrees of pulpal and periapical pathology

    OpenAIRE

    Patrícia Motta Fernandes

    2007-01-01

    O objetivo deste estudo foi avaliar a morfologia da superfície externa de ápices radiculares de dentes decíduos de humanos com necrose pulpar, com e sem lesão periapical visível radiograficamente, e de dentes com vitalidade pulpar, por meio da microscopia eletrônica de varredura (MEV). Dezenove dentes foram extraídos sendo cinco dentes com vitalidade pulpar (Grupo I), seis com necrose pulpar sem lesão periapical (Grupo II) e oito com necrose pulpar e lesão periapical (Grupo III). Os dentes (i...

  2. 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)

  3. 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)

  4. Relevant parameters for construction of a radon controlled chamber; Parametros relevantes para construcao de uma camara controlada de radonio

    Energy Technology Data Exchange (ETDEWEB)

    Estrada, Julio J.S.; Matta, Luiz E.S.C. [Instituto de Radioprotecao e Dosimetria (IRD), Rio de Janeiro, RJ (Brazil); Alves, Rex N. [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil)

    1997-10-01

    This work intends to discuss important parameters to be considered during the construction of a controlled radon chamber. Based on the review of different chambers, it was noticed that some characteristics such as size, shape, volume, and source activity are dependent on the chamber applications. Parameters such as aerosol generation, humidity, temperature and pressure inside the chamber are also discussed. A design of a multipurpose controlled radon chamber is suggested. (author). 10 refs., 2 figs., 1 tab.

  5. Laboratory implantation for well type ionization chambers calibration; Implantacao de um laboratorio para calibracao de camaras de ionizacao tipo poco

    Energy Technology Data Exchange (ETDEWEB)

    Vianello, E.A.; Dias, D.J.; Almeida, C.E. de [Laboratorio de Ciencias Radiologicas- LCR- DBB (UERJ). R. Sao Francisco Xavier, 524- Pav. HLC, sala 136 terreo- CEP 20.550-013. Rio de Janeiro (Brazil)

    1998-12-31

    The Radiological Science Laboratory is implanting a service for calibration of well type chambers by IAEA training program. The kerma rate in the air (mu Gy/h) of the linear Cs-137 reference source CDCS-J4 have been determined using a well type chamber Standard Imaging HDR-1000 model, which have been calibrated at Secondary Standard Laboratory Calibration of IAEA, whereas two HDR-1000 Plus chambers were calibrated too, following the same standards. The results were compared with Wisconsin University calibration certification and has demonstrated that well type ionization chamber calibration can be used in brachytherapy for several kinds of radionuclides. (Author)

  6. 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)

  7. 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)

  8. Uso do metronidazol como medicação intracanal em dentes com necrose pulpar e reação periapical: relato de caso = The use of metronidazol as an intracanal medication for teeth with pulpar necrosis and periapical reaction: case report

    Directory of Open Access Journals (Sweden)

    Carneiro, Sérgio Murilo Barbalho de Souza

    2005-01-01

    Full Text Available O objetivo desse trabalho foi comparar dois tratamentos endodônticos realizados em dentes com abscesso periapical crônico, em um mesmo paciente, empregando-se medicações intracanais diferentes. Para isso foram relatados dois casos clínicos de tratamentos endodônticos em dois dentes (31 e 41, nos quais foram empregados a mesma técnica de preparo biomecânico e obturação, variando apenas a medicação intracanal, pois no dente 31 foi empregada uma pasta a base de hidróxido de cálcio (Calen e no dente 41, o metronidazol na forma de gel ginecológico. Após um ano de proservação dos tratamentos realizados, verificou-se reparação dos tecidos periapicais em ambos os dentes, concluindo-se que, nesse caso, a variação da medicação intracanal não interferiu no resultado do tratamento instituído e que o metronidazol pode ser uma alternativa viável como coadjuvante na terapia endodôntica desse tipo de patologia

  9. Materiales de obturación radicular utilizados en dientes deciduos

    OpenAIRE

    Trejo-A; Cuevas-C

    2014-01-01

    La caries y traumatismos son las principales causas de urgencias en odontología pediátrica. Estas afecciones pueden llegar a ejercer un daño irreversible en el tejido pulpar comprometiendo la permanencia de los órganos dentarios afectados. Para limitar el daño pulpar y evitar la extracción de piezas temporales se han diseñado distintas técnicas que van desde recubrimientos pulpares hasta un tratamiento más radical como la pulpectomía. Ésta última consiste en la extirpación del tejido pulpar, ...

  10. 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.

  11. 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.

  12. 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)

  13. A case of acute diarrhea due to the emerging pathogen Campylobacter jejuni subsp. doylei in Southern Chile Um caso de diarréia aguda devido ao patógeno emergente Campylobacter jejuni subsp. doylei no sul do Chile

    Directory of Open Access Journals (Sweden)

    Heriberto Fernández

    2003-04-01

    Full Text Available The first documented case of acute diarrhea due to C. jejuni subsp. doylei in Chile is reported. The clinical findings, the absence of other enteropathogens, virus or parasites and the fact that C. jejuni subsp. doylei was the only bacteria isolated support the assumption that it was the etiological agent of this diarrheal case.O primeiro caso documentado de diarréia aguda por C. jejuni subsp. doylei no sul do Chile é apresentado. As características clínicas, a ausência de outros enteropatógenos, vírus ou parasitas, e o fato de C. jejuni subsp. doylei ter sido a única bactéria isolada, permitem assumir que este microrganismo é o agente etiológico neste caso de diarréia.

  14. 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.

  15. Morbidity due to Schistosoma mansoni - Entamoeba histolytica coinfection in hamsters (Mesocricetus auratus Morbidade em hamsters (Mesocricetus auratus devido à co-infecção Schistosoma mansoni - Entamoeba histolytica

    Directory of Open Access Journals (Sweden)

    Silvio Santana Dolabella

    2007-04-01

    Full Text Available Data on Schistosoma mansoni-Entamoeba histolytica coinfection are scarce in the literature. In the present study, hamsters that had been infected for 70 days with Schistosoma mansoni (LE strain were inoculated via the portal vein with two strains of trophozoites of Entamoeba histolytica: ICB-EGG (highly virulent and ICB-RPS (non-virulent. The most evident result of coinfection was increased morbidity and mortality, in comparison with either of the infections alone. Histologically, there were no evident signs of interaction between these two infections. The morphological findings of schistosomal granuloma and amoebic abscesses in the liver were similar to those seen in the respective single-infection controls. However, there was severe wasting of the animals with both infections and greater numbers of amoebic lesions in their livers. The results obtained indicated that schistosomiasis aggravates the course of amoebiasis in hamsters.Dados sobre a co-infecção Schistosoma mansoni-Entamoeba histolytica são escassos na literatura. No presente estudo, hamsters com 70 dias de infecção por Schistosoma mansoni (cepa LE foram inoculados com trofozoítos de Entamoeba histolytica, cepa ICB-EGG (virulenta e cepa ICB-RPS (não virulenta, via veia porta. O mais evidente resultado da co-infecção foi o aumento da morbidade e mortalidade, quando comparado com os animais com somente uma das infecções. Histologicamente, não houve sinais evidentes da interação entre as duas infecções. O aspecto morfológico do granuloma esquistossomótico e do abcesso hepático amebiano são similares aos observados nos controles, com somente uma infecção. Entretanto, foi observado que os animais co-infectados apresentavam-se mais debilitados e com maior número de lesões amebianas no fígado. Os resultados obtidos indicam que a esquistossomose agrava o curso da infecção amebiana em hamsters.

  16. Hemolytic disease of the newborn due to anti-U Doença hemolítica do recém-nascido devido a anti-U

    Directory of Open Access Journals (Sweden)

    Marcia Cristina Zago Novaretti

    2003-01-01

    Full Text Available Anti-U is a rare red blood cell alloantibody that has been found exclusively in blacks. It can cause hemolytic disease of the newborn and hemolytic transfusion reactions. We describe the case of a female newborn presenting a strongly positive direct antiglobulin test due to an IgG antibody in cord blood. Anti-U was recovered from cord blood using acid eluate technique. Her mother presented positive screening of antibodies with anti-U identified at delivery. It was of IgG1 and IgG3 subclasses and showed a titer of 32. Monocyte monolayer assay showed moderate interaction of Fc receptors with maternal serum with a positive result (3.1%. The newborn was treated only with 48 hours of phototherapy for mild hemolytic disease. She recovered well and was discharged on the 4th day of life. We conclude that whenever an antibody against a high frequency erythrocyte antigen is identified in brown and black pregnant women, anti-U must be investigated.Anti-U é um aloanticorpo eritrocitário raro detectado exclusivamente em negros, que pode causar doença hemolítica do recém-nascido e reações transfusionais hemolíticas. Relatamos o caso de um recém-nascido, de sexo feminino, que apresentou teste de antiglobulina direto fortemente positivo, dirigido a um anticorpo IgG em sangue de cordão umbilical. Anti-U foi identificado por técnica de eluição ácida. A mãe apresentava pesquisa de anticorpos irregulares positiva com anticorpo anti-U, de subclasses IgG1 e IgG3, título 32, identificado ao nascimento. O ensaio de monocamada de monócitos apresentou resultado positivo (3.1%, mostrando uma interação moderada de receptores Fc com soro materno. O recém-nascido foi tratado somente por fototerapia durante 48 horas para uma doença hemolítica leve. A criança recuperou-se bem e teve alta médica no quarto dia de vida. Concluímos que quando um anticorpo contra um antígeno eritrocitário de alta freqüência for identificado em gestantes negras e pardas, anti-U deve ser investigado.

  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. 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)

  19. 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

  20. Ocular masquerade syndrome due to intraocular lymphoma - two forms of retinal pigment epithelium involvement: case reports Síndrome ocular mascarada devido linfoma intra-ocular: relato de casos

    Directory of Open Access Journals (Sweden)

    Miguel Hage Amaro

    2007-06-01

    Full Text Available Ocular masquerade syndrome was diagnosted in two patients with chronic uveitis. The patients presented non-Hodgkin's lymphoma as the final diagnosis two forms of intraocular retinal pigment epithelium involvement was seen. One case was flecks of the retinal pigment epithelium and another case was a solid retinal pigment epithelium detachment. These unusual presentations of non-Hodgkin's lymphoma is an alert to all involved in lymphoma care.Os autores apresentam dois casos de pacientes com linfoma não-Hodgkin, diagnosticados inicialmente como uveite crônica de etiologia não determinada. Os exames posteriores a partir da presença de outros sinais e sintomas demonstraram a presença de linfoma não-Hodgkin nestes pacientes. Um dos pacientes apresentava "flecks" ao nível do epitélio pigmentar da retina e o outro paciente apresentava descolamento sólido do epitélio pigmentar da retina. Estas formas de envolvimento do epitélio pigmentar da retina não são usuais em linfoma não-Hodgkin.

  1. Absorbed doses by the thyroid follicles due to the short half-lives isotope; Dose absorvida pelos foliculos tireoideanos devido aos isotopos de iodo de meia-vida curta

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Laelia; Amaral, Ademir; Colas-Linhart, Nicole; Hindie, Elif; Oliveira, Jairo R. de; Oliveira, Pedro A.R. de [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Energia Nuclear. Grupo de Estudos em Radioprotecao e Radioecologia (GERAR); Universite Paris 7, Paris Cedex 18 (France). Faculte de Medecine Xavier Bichat. Lab. de Chimie et Biophysique des Traceurs; Paris Cedex 12 (France). Hopital Saint-Antoine. Service de Medecine Nucleaire; Universidade Federal de Pernambuco UFPE, Recife, PE (Brazil). Dept. de Fisica e Matematica; E-mails: lpbcampos@uol.com.br; amaral@ufpe.br

    2005-11-15

    The aim of this work is to evaluate the contributions of internally deposited short-lived iodines to the dose absorbed by thyroid's follicle, in the case of nuclear accidents . Dose calculation was carried out, at follicular level, for {sup 131} I and short-lived iodines ({sup 132}I, {sup 133}I, {sup 134}I and {sup 135}I), using the code MCNP4C. The thyroid's follicles were modeled as spheres, with different diameters (between 40 to 240 {mu}m), having the same density as for soft tissue ({rho} = 1.04 g.cm{sup -3}). The results showed that the contribution of short-lived iodines for total dose is about 72%. The results reported in this work pointed out that, in case of nuclear accidents, the contributions of the short-lived iodines to the total dose absorbed by thyroid, at follicular level, cannot be neglected in a prospective evaluation of risks associated to internal contamination by radioactive iodine.(author)

  2. Desempenho de reatores UASB expostos a choques de carga hidráulica e diluição de matéria orgânica devidos a eventos de chuva

    OpenAIRE

    Mónica Liliana Salazar Peláez

    2007-01-01

    Os sistemas de esgotos urbanos são classificados em separador absoluto, separador parcial e unitário, conforme o grau de separação que existe no recolhimento dos esgotos sanitários e das águas de drenagem pluviais. Embora a diretriz das cidades brasileiras seja a adoção do sistema separador, na prática ocorre uma importante contribuição das águas de chuvas nas vazões afluentes às estações de tratamento de esgotos como produto das interconexões existentes, clandestinas ou não, entre as redes d...

  3. 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)

  4. 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.

  5. 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.

  6. 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)

  7. 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)

  8. Changes in the structure of doped poly aniline (Pani-HCL) due to the process of de-doped;Alteracos na estrutura da polianilina dopada (PAni-HCL) devido ao processo de desdopagem

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Everton Carlos; Oliveira, Maria Auxiliadora Silva de, E-mail: evertonquimica@gmail.co [Instituto Tecnologico da Aeronautica (ITA), Sao Jose dos Campos, SP (Brazil). Dept. de Engenharia Mecanica e Aeronautica. Lab. de Estudos de Corrosao

    2009-07-01

    The poly aniline (PAni) is much studied, partly due to its relatively ease chemical or electrochemical synthesis, thermal stability in air and redox behavior. The chemical synthesis of poly aniline (PAni) was performed in a medium containing hydrochloric acid (HCl) as a doping agent. After that, the obtained polymer was de-doped in alkaline medium (NH4OH). Thermogravimetric analysis (TG) showed that the doped polymer, PAni-HCl, shows better thermal stability in comparison with the de-doped polymer (PAni-NH4OH). Differential scanning calorimetry (DSC) analyses show that the number of processes occurring during the heating of the polymer, as well as the complexity of them, is much higher in the PAni-HCl than the in the PAni-NH4OH. Through the spectra of FTIR and Raman could conclude that dedoping PAni-HCl was not complete, but the degree of doping of PAni-NH4OH decreased by treatment with ammonium hydroxide. XRD analysis pointed out that as the PAni-HCl as the PAni-NH4OH are partially crystalline. (author)

  9. 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)

  10. 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)

  11. 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)

  12. Cardiogenic shock due to citomegalovirus myocarditis: successful clinical treatment Choque cardiogênico devido à miocardite por citomegalovírus: terapêutica clínica com sucesso

    Directory of Open Access Journals (Sweden)

    José Francisco Baumgratz

    2010-06-01

    Full Text Available OBJECTIVE: Cytomegalovirus (CMV systemic disease and myocarditis in healthy persons is infrequently reported in the literature, although in increasing numbers in recent years. The importance of the recognition of the syndrome that usually has an initial picture of a mononucleosis like infection in an otherwise healthy person, is the available therapeutic agent, ganciclovir, that can cure the infectious disease. METHODS: We analyzed the clinical result of pulsotherapy with steroids in a patient with CMV myocarditis after 7 days of etiological treatment, with ganciclovir, intravenous vasodilators, and the conventional treatment for congestive heart failure. RESULTS: The clinical condition of the patient improved accordingly to the better function of the left ventricle, and the ganciclovir was kept for 21 days, most of it in an out patient basis. The patient was dismissed from the hospital, with normal myocardial function. CONCLUSION: Potentially curable forms of myocarditis, like M pneumoniae and CMV, for example, can have an initial disproportionate aggression to the myocardium, by the acute inflammatory reaction, that can by itself make worse the damage to the LV function. In our opinion, the blockade of this process by pulsotherapy with steroids can help in the treatment of these patients. We understand that the different scenario of immunosuppressive treatments for the possible auto immunity of the more chronic forms of the presumably post viral cardiomyopathy has been in dispute in the literature, and has stolen the focus from the truly acute cases.OBJETIVO: Doença sistêmica por citomegalovírus (CMV com miocardite em pessoas saudáveis é raramente referida na literatura, apesar de em maior número em anos recentes. A importância do reconhecimento da síndrome, que usualmente tem um quadro inicial "mononucleosis like" em uma pessoa sadia é a disponibilidade do agente terapêutico ganciclovir, que pode curar a infecção. MÉTODOS: Nós analisamos o resultado da pulsoterapia com esteróides em um paciente com miocardite por CMV, após 7 dias de tratamento etiológico com ganciclovir, vasodilatadores intravenosos e o tratamento convencional para insuficiência cardíaca congestiva. RESULTADOS: A condição clínica do paciente melhorou com a melhor função do ventrículo esquerdo e o ganciclovir foi mantido por 21 dias após alta hospitalar.A função miocárdica retornou ao normal. CONCLUSÃO: Formas curáveis de miocardites como M pneumonia e CMV, por exemplo, podem ter uma agressão grave ao miocárdio por uma ação inflamatória que pode piorar a função cardíaca. Em nossa opinião, o bloqueio deste processo pela pulsoterapia com esteróides pode auxiliar no tratamento destes pacientes. Entendemos que existe um cenário diferente de tratamento com imunossupressores para possível agressão auto-imune das formas mais crônicas de cardiomiopatias dilatadas e isso está em disputa na literatura, talvez mudando o foco dos casos realmente agudos.

  13. 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.

  14. Reconstructive dosimetry and radiation doses evaluation of members of the public due to radiological accident in industrial radiography; Dosimetria reconstrutiva e avaliacao de dose de individuos do publico devido a acidente radiologico em radiografia industrial

    Energy Technology Data Exchange (ETDEWEB)

    Lima, Camila Moreira Araujo de

    2016-07-01

    Radiological accidents have occurred mainly in the practices recognized as high risk radiological and classified by the IAEA as Categories 1 and 2, and highlighted the radiotherapy, industrial irradiators and industrial radiography. In Brazil, since there were five major cases in industrial radiography, which involved 7 radiation workers and 19 members of the public, causing localized radiation lesions on the hands and fingers. One of these accidents will be the focus of this work. In this accident, a {sup 192}Ir radioactive source was exposed for more than 8 hours in the workplace inside a company, exposing radiation workers, individuals of the public and people from the surrounding facilities, including children of a school. The radioactive source was also handled by a security worker causing severe radiation injuries in the hand and fingers. In this paper, the most relevant and used techniques of reconstructive dosimetry internationally are presented. To estimate the radiation doses received by exposed individuals in various scenarios of radiological accident in focus, the following computer codes were used: Visual Monte Carlo Dose Calculation (VMC), Virtual Environment for Radiological and Nuclear Accidents Simulation (AVSAR) and RADPRO Calculator. Through these codes some radiation doses were estimated, such as, 33.90 Gy in security worker's finger, 4.47 mSv in children in the school and 55 to 160 mSv for workers in the company during the whole day work. It is intended that this work will contribute to the improvement of dose reconstruction methodology for radiological accidents, having then more realist radiation doses. (author)

  15. 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.

  16. 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.

  17. Variação do movimento da água do solo devido à atividade de minhocas: simulação numérica Chance of soil-water movement due to eartworms activity: numerical simulation

    Directory of Open Access Journals (Sweden)

    Masato Kobiyama

    1996-08-01

    Full Text Available Este trabalho teve o objetivo de avaliar a influência das minhocas sobre o movimento da água no solo. O fluxo da água unidimensional, vertical e não saturada foi expresso com base na equação de Picharas, que foi resolvida pelo método de diferenças finitas. As propriedades hidráulicas dos solos com e sem minhocas, que foram medidas no campo, foram utilizadas e expressas com as equações de VAN GENUCHTEN (1980. Os resultados mostram que a atividade das minhocas aumenta o pico do hidrograma no solo onde a água subsuperficial é dominante no processo chuva-vazão. Entretanto, o fenômeno do aumento do pico depende da relação entre os aumentos da condutividade hidráulica saturada (Ks e da umidade saturada (tetas. Se as minhocas provocarem um pequeno aumento em Ks ou um elevado aumento em tetas, haverá uma redução do pico. Caso ocorra contrário, um elevado aumento em Ks ou um pequeno aumento em tetas, este pico aumenta.The objective of this study was to evaluate, with a numerical method, the influence of earth worms on the soil-water movement. The one-dimensional, vertical, saturated and unsaturated water flow was expressed by the Richards equation. The generated equations were solved with a fïnite difference method. The hydraulic properties of soils with and without earthworms, which were measured on field, were utilized and expressed with VAN GENUCHTEN (1980 equations. The results demonstrated that the eathworms activity increased a peak of hydrograph of soil where the subsurface flow is dominant in the rainfall-runoff process. However, the phenomenon of this increase depenas on the relation between the increases of the saturated hydraulic conductivity (Ks and the saturated water content (thetas. When the earthworms provide a small increase of Ks and a large increase of thetas, the peak would decrease. In the contrary case where Ks increases a lot and thetas increases a little, the peak would increase.

  18. Previsão do ruído ambiental urbano devido à implantação do Modal Veículo Leve sobre Trilhos (VLT) por meio de simulação computacional

    OpenAIRE

    Amorim, Adriana Eloá Bento; Durante, Luciane Cleonice; Vilela, Jhonatha Correia; Callejas, Ivan Julio Apolônio

    2017-01-01

    Resumo: O trabalho avaliou os impactos da implantação do Veículo Leve sobre Trilhos (VLT) no ruído ambiental de um corredor estrutural viário do aglomerado urbano de Cuiabá-Várzea Grande/MT, Brasil. Utilizando simulação computacional, concluiu-se que, muito embora, a implantação do VLT proporcione redução do ruído ambiental, este ainda permanece acima do limite normativo, indicando a necessidade de adoção de gestão integrada para mitigação da poluição sonora urbana. Abstract: The study aim...

  19. 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.

  20. ESTUDIO CLÍNICO-RADIOGRÁFICO COMPARATIVO DEL RECUBRIMIENTO PULPAR INDIRECTO CON PASTA A BASE DE UNCARIA TOMENTOSA VS. HIDRÓXIDO DE CALCIO Y CEMENTO ÓXIDO DE ZINC - EUGENOL.

    OpenAIRE

    Lahoud S., Víctor; Pas Director de la Escuela Académico Profesional.; Llizarbe E., Saúl; Profesor Asociado. Departamento Académico Estomatología Rehabilitadora.; Ballona Ch., Pedro; Profesor Departamento Académico Médico Quirúrgico.

    2014-01-01

    90 premolares and molares diagnosed with deep caries groud with symptoms of reversable pulpitis, were divided in 3 groups: Group I, 30 teeth having indirect pulp cap (IPC) Uncaria tomentosa; Group II, 30 teeth having indirect pulp cap with calcium Hidroxyde; Group III, 30 teeth having on indirect pulp cap with Zinc Oxide Eugenol. The clinical radiographic study 90 days demostrated comparativity the advantages of the aplication of Uncaria Tomentosa in the Indirect pulp Cap over the utilization...

  1. Desarrollo y caracterización de dos materiales biocerámicos basados en β-CaSiO₃ (Wollastonita) para el tratamiento pulpar del diente temporal y permanente joven

    OpenAIRE

    Badillo Perona, Vanesa

    2016-01-01

    El empleo de la wollastonita ha sido ampliamente documentado en la literatura como sustituto óseo, siendo un material accesible, económico, biocompatible, bioactivo y osteoinductivo. Los cementos en base a wollastonita se presentan mezclando una fase solida (polvo) con una fase líquida para formar una pasta manejable, la cual se transforma en una masa dura en pocos minutos (mediante fraguado o desecación). El objetivo de nuestro trabajo está enfocado a mejorar y desarrollar nuevos cementos do...

  2. 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)

  3. Análise microscópica da polpa dental de cães após pulpotomia e proteção pulpar com agregado de trióxido mineral e cimento Portland branco

    OpenAIRE

    Renato Menezes; Clóvis Monteiro Bramante; Roberto Brandão Garcia; Ariadne Letra; Vanessa Graciela Gomes Carvalho; Everdan Carneiro; Sérgio Brunini; Rodrigo Cardoso de Oliveira; Giovana Calichio Canova; Fernanda Gomes de Moraes

    2004-01-01

    Considering previous studies on the similarity between the chemical composition of the mineral trioxide aggregate and the Portland cement, the purpose of this study was to investigate the pulp response of dog's teeth after pulpotomy and direct pulp protection with MTA Angelus and white Portland cement. Thirty eight pulp remnants were protected with these materials. One hundred and twenty days after treatment, the animals were sacrificed and the specimens removed and prepared for histological ...

  4. 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

    Directory of Open Access Journals (Sweden)

    Só, Marcus Vinicius Reis

    2011-01-01

    Conclusão: O uso do EDTA misturado com o hipoclorito de sódio reduziu a propriedade de dissolução tecidual comparado ao hipoclorito de sódio sozinho, a despeito das concentrações de hipoclorito de sódio

  5. Effect of the addition of collagen in the preparation of hydroxyapatite, aiming the application of pulp capping; Efeito da adicao de colageno na preparacao de hidroxiapatita visando a aplicacao como capeador pulpar

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Geysy L.; Mendes, Luis C., E-mail: geysylopes@ima.ufrj.br [Instituto de Macromoleculas Professora Eloisa Mano (IMA) - Universidade Federal do Rio de Janeiro, UFRJ. Centro de Tecnologia, RJ (Brazil)

    2011-07-01

    This work studied the action of collagen (COLL) in the hydroxyapatite (HA) synthesis, produced through sol-gel process, in order to mimetize the chemical composition of dental tissue. The resulting material was characterized by energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), wide-angle X-ray diffraction (WAXD) and scanning electron microscopy (SEM). The Ca/P ratio was determined through EDX - 1,89 e 2,38, with and without collagen, respectively. The FT-IR analysis showed no significant interaction between the constituents of the composite. The R-ray diffractograms indicated an increase of the resolution and intensity of the HA peak. The photomicrographies showed that the preparation method exhibited significantly influence onto the hydroxyapatite morphology, as well as resulted in a homogeneously dispersed composite. (author)

  6. 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)

  7. Dosimetry in VMAT for prostate using ionization chambers of different volumes; Verificacao dosimetrica em VMAT para prostata com camaras de ionizacao de volumes diferentes

    Energy Technology Data Exchange (ETDEWEB)

    Groppo, Daniela P.; Anderson, Ernani; Pavan, Guilherme A., E-mail: danielagroppo@grupocoi.com, E-mail: ernanianderson@grupocoi.com [Clinicas Oncologicas Integradas (Grupo COI), Rio de Janeiro, RJ (Brazil); Caldas, Linda V.E., E-mail: lcaldas@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2016-07-01

    The volumetric modulated arc therapy is one of the most modern radiotherapy techniques. The advents of this modality in the dose delivery can also contribute to errors during the execution of the treatment, therefore various types of quality control are carried out. The individual assessment of dose delivered to the patient is also an important quality control test and required by the current regulations. The objective of this study was to evaluate the use of different volume ionization chambers for dosimetry of VMAT treatments for prostate cancer. Three ionization chambers were evaluated and all of them showed satisfactory results. (author)

  8. 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)

  9. 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

  10. 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)

  11. 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)

  12. 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)

  13. 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)

  14. Development of a parallel plate ion chamber for radiation protection level; Desenvolvimento de uma camara de ionizacao de placas paralelas para protecao radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Bottaro, Marcio; Landi, Mauricio [Universidade de Sao Paulo (STEEE/IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Secao Tecnica de Ensaios em Equipamentos Eletromedicos; Moralles, Mauricio [Instituto de Pesquisas Energeticas e Nucleares (CRPq/IPEN/CNEN-SP), SP (Brazil). Centro do Reator Nuclear de Pesquisas

    2011-07-01

    A new parallel plate vented ion chamber is proposed in this paper. The application of this chamber was primarily intended to the measurement of stray radiation in interventional procedures, but the energy response of about 2.6%, which was obtained in the first prototype, on the range from 40 to 150 kV using ISO 4037-1 narrow qualities, provided the possibility of a wide modality application on radiation protection. Primary studies with Maxwell 2D electromagnetic field simulator revealed an optimized model regarding effective volume and saturation voltage levels, which conferred to the ion chamber a dual entrance window feature. The development of this ion chamber has the main contribution of Monte Carlo calculations as a support tool to the establishment of the effective volume of the chamber and determination of the best materials for housing mounting and conductive elements, such as guard rings, electrode, and windows. Even the composition of the conductive layers, which would be neglected due to their very small thicknesses (about 35 {mu}m), had important influence on the results and could be better understood with Monte Carlo N-Particle Transport Code System (MCNP) simulations. (author)

  15. Calibration of PKA meters against ion chambers of two geometries; Calibracao de medidores de PKA contra camaras de ionizacao de duas geometrias

    Energy Technology Data Exchange (ETDEWEB)

    Almeida Junior, Jose N.; Terini, Ricardo A. [Pontificia Universidade Catolica de Sao Paulo (PUC-SP), SP (Brazil). Dept. de Fisica; Pereira, Marco A.G.; Herdade, Silvio B. [Universidade de Sao Paulo (STDTS/IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Secao Tecnica de Desenvolvimento Tecnologico em Saude

    2011-07-01

    Kerma-area product (KAP or PKA) is a quantity that is independent of the distance to the X-ray tube focal spot and that can be used in radiological exams to assess the effective dose in patients. Clinical KAP meters are generally fixed in tube output and they are usually calibrated on-site by measuring the air kerma with an ion chamber and by evaluating the irradiated area by means of a radiographic image. Recently, a device was marketed (PDC, Patient Dose Calibrator, Radcal Co.), which was designed for calibrating clinical KAP meters with traceability to a standard laboratory. This paper presents a metrological evaluation of two methods that can be used in standard laboratories for the calibration of this device, namely, against a reference 30 cc ionization chamber or a reference parallel plates monitor chamber. Lower energy dependence was also obtained when the PDC calibration was made with the monitor chamber. Results are also shown of applying the PDC in hospital environment to the cross calibration of a clinical KAP meter from a radiology equipment. Results confirm lower energy dependence of the PDC relatively to the tested clinical meter. (author)

  16. 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)

  17. 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)

  18. 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.

  19. Development and characterization of special ionization chambers for computed tomography beams; Desenvolvimento e caracterizacao de camaras de ionizacao especiais para feixes de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Maysa Costa de

    2016-10-01

    The use of computed tomography (CT) for imaging procedures is growing due to advances in the CT equipment technology, because they allow the obtention of images with better resolution than through other techniques. Therefore, they are responsible for increasing the dose radiation of patients during the procedure. This fact led to a greater concern about the doses received by patients who undergo this type of examination. To perform the dosimetry in CT beams, the most widely used instrument is the pencil type ionization chamber, because this dosimeter has a uniform response to the incident radiation beam for all angles. The conventional ionization chamber, which is available on the market, has a sensitive volume length of 10 cm; however, some studies have shown that this dosimeter has underestimated the dose values. Therefore, in this study two ionization chambers with sensitive volume lengths of 10 cm and 30 cm, making use of low cost national materials, were developed at the Calibration Laboratory of Instruments (LCI-IPEN/CNEN). The characterization of these chambers was performed, and the results were obtained within the international recommended limits. As an application, the developed ionization chambers and a commercial chamber were tested in a clinical tomograph. The developed ionization chambers were analyzed in a complete way for their possible uses. (author)

  20. 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)

  1. 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)

  2. Dosimetric verification of IMRT treatments using ionization chamber, radiographic film and gamma function; Verificacao dosimetrica de tratamentos de IMRT utilizando camara de ionizacao, filme radiografico e funcao gama

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Tatiana M.M.T.; Casagrande, Thais M.; Neves-Junior, Wellington F.P.; Mancini, Anselmo; Pelosi, Edilson L.; Haddad, Cecilia M.K.; Silva, Joao L.F., E-mail: tatiana.alves@hsl.org.b [Sociedade Beneficente de Senhoras Hospital Sirio-Libanes, Sao Paulo, SP (Brazil). Setor de Radioterapia

    2010-06-15

    This study aimed to evaluate the method adopted for patient specific intensity modulated radiotherapy (IMRT) quality assurance through the verification of planned and measured dose distributions and analyzing the correlation of the results with the acceptance criteria previously established. In the planning system, the patients complete plan is transferred to the computed tomography images of a pelvis or head and neck (HN) phantom composed of slabs of polymethylmethacrylate with an ionization chamber and radiographic film in the coronal plane. The dose measured with the ionization chamber and the dose distribution obtained with the film were compared with the planning. The comparison between measured and planned dose distributions was performed using the gamma function (y), assessing the percentage of points that meet the criteria of 3% dose difference and 3mm distance to agreement. By the previous analysis of 111 plans an acceptance criteria was defined based on the average results and after that they were applied on 30 new cases. The acceptance criteria were: 1.8+-1.4% (prostate), 2.7+-1.9% (HN) and 2.1+-1.7% (others) for the mean absolute errors between the doses provided by the planning system and those measured with the ionization chamber. The criteria for the average percentage of agreement (y<-1) between the dose distributions was 97.2+-2.8% (prostate), 95.2+-3.3% (HN) and 92.3+-7.4% (others). The new analyzed cases showed mean absolute errors of 1.1+-1.2% (prostate), 2.2+-1.5% (HN) and 1.6+-1.2% (others) and average percentage of agreement of 98.3+-1.0% (prostate), 95.2+-2.3% (HN) and 96.7+-2.9% (others). The acceptance criteria agreed with other authors and were respected by the planning verified posteriorly. We conclude that the established acceptance criteria are appropriate for the reality of our institution, and we are able to treat the patients safely. (author)

  3. Operation of 1 m{sup 3} plug flow plant on mixture of lantana-camara and cattle dung for biogas production

    Energy Technology Data Exchange (ETDEWEB)

    Kalia, A.K.; Singh, S.P. [Department of Agricultural Engineering, H.P. Krishi Vishvavidyalaya, Palampur (India)

    1998-12-31

    Earlier laboratory experiments with a mixture of 3 parts grass to 2 parts dung produced the highest gas yield. However, the plant was congested with one year. Subsequently, the proportion of grass was reduced to 1 part grass and 4 parts dung. The 1 m{sup 3} plant with a length - width ratio of 2 : 1 and a retention time of 55 days produced 4,23% more gas than the control plant filled with pure cattle dung. The methane content was also somewhat higher. The plant operated for almost two years without becoming congested. The authors conclude from this that such biogas plants on small farms can be filled with 20% grass and 80% dung in practice. (orig.)

  4. 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)

  5. 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)

  6. 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.

  7. 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.

  8. Factores asociados a la pérdida de dientes en pacientes con tratamiento endodóntico realizado por estudiantes de pregrado, Medellín (Colombia) / Factors Associated to Tooth Loss in Patients with Endodontic Treatment carried out by Dental Students

    National Research Council Canada - National Science Library

    Eliana Pineda-Vélez; Mario A Cumplido-Mendoza; Luis Miguel Madrid-Gutiérrez; María Camila Páez-Herrera; Natalia Tobón-Taborda; Laura Marcela Barreneche; Andrés A Agudelo-Suárez

    2015-01-01

      . Antecedentes: en las instituciones formadoras del recurso humano odontológico es común encontrar que asisten pacientes con problemas pulpares o periapicales, los cuales requieren tratamiento...

  9. Interpretación fisiopatológica de los diferentes estadios de una pulpitis Physiopathological interpretation of the different pulpitis stages

    OpenAIRE

    Andrés O Pérez Ruiz; Raquel Roseñada Cepero; Ileana Grau León; Rosa M González Ramos

    2005-01-01

    La caries dental que vulnera los tejidos duros del diente y compromete a la pulpa provoca un proceso inflamatorio que progresa por varias fases o estadios: pulpitis reversible, pulpitis transicional, pulpitis irreversible y pulpa necrótica. El tejido pulpar agredido por microorganismos no experimenta una necrosis repentina, sino que va sucumbiendo progresivamente, y cada uno de los estadios pulpares por los que transita el proceso, se puede ir identificando mediante el dolor con sus caracterí...

  10. AP Potential Expectancy Tables Based on PSAT/NMSQT and SAT Scores on the 2015-16 Redesigned Scales Using Final Concordance Tables. Statistical Report

    Science.gov (United States)

    Ewing, Maureen; Wyatt, Jeff

    2017-01-01

    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…

  11. C:\\Users\\AISA\\Desktop\\A. B. FANDOHAN.xps

    African Journals Online (AJOL)

    AISA

    suitable habitats are at high risk of invasion by L. camara, and should be accorded high priority when formulating appropriate management strategies. Key words : Invasive species ; Climate change ; Habitat suitability ; Protected areas ; West Africa. RESUME. LANTANA CAMARA ET LES AIRES PROTEGEES AU BENIN.

  12. 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…

  13. Assessing the utility of the spot 6 sensor in detecting and mapping ...

    African Journals Online (AJOL)

    Lantana camara is a significant weed in South Africa which is causing severe impacts on agriculture by reducing grazing areas. This study assessed the potential of the SPOT 6 multispectral sensor and two broadband vegetation indices (NDVI and SR) for detecting and mapping Lantana camara in a community grazing ...

  14. Perception of the relationship France–Africa by André Gide and ...

    African Journals Online (AJOL)

    The hero is a troubled Frenchman travelling in Africa. Camara inverted the roles traditionally attributed to Europe and Africa. The crossing of various regions is presented as initiatory tests which bring about the hero's palingenesis. Camara shows that a spiritual Africa brought peace and salvation to the Frenchman.

  15. Incorporating Ninth-Grade PSAT/NMSQT® Scores into AP Potential™ Predictions for AP® European History and AP World History. Statistical Report 2014-1

    Science.gov (United States)

    Zhang, Xiuyuan; Patel, Priyank; Ewing, Maureen

    2015-01-01

    Historically, AP Potential™ correlations and expectancy tables have been based on 10th-and 11th-grade PSAT/NMSQT® examinees and 11th-and 12th-grade AP® examinees for all subjects (Zhang, Patel, & Ewing,2014; Ewing, Camara, & Millsap, 2006; Camara & Millsap, 1998). However, a large number of students take AP European History and AP…

  16. Lantana poisoning of cattle and sheep in New Zealand.

    Science.gov (United States)

    Black, H; Carter, R G

    1985-08-01

    The investigation of a field case of Lantana camara poisoning in cattle is reported. Toxicity was confirmed by the experimental dosing of two sheep with dried leaf powder at 6 and 12 mg/kg body weight. Marked cholestatic hepatophy and renal tubular disease resulted. This is the first reported case of toxicity due to grazing a Lantana camara variety grown in New Zealand.

  17. Insecticidal effect of kaolin powder flavoured with essential oils of ...

    African Journals Online (AJOL)

    Insecticidal effect of kaolin powder flavoured with essential oils of Lantana camara L. (Verbenaceae) and Annona senegalensis Pers. (Annonaceae) on ... Purified and pulverized kaolin was flavoured with essential oils of A. Senegalensis Pers. and L. camara (Lam) obtained through vapour distillation. Adults C. serratus ...

  18. Browse Title Index

    African Journals Online (AJOL)

    Items 501 - 550 of 921 ... Alexandre Delamou, Sidikiba Sidibé, Alison Marie El Ayadi, Bienvenu Salim Camara, Thérèse Delvaux, Bettina Utz, Abdoulaye II Toure, Sah D. Sandouno, Alioune Camara, Abdoul Habib Beavogui, Asm Shahabuddin, Karen Van der Veken, Bouchra Assarag, Junko Okumura, Vincent De Brouwere.

  19. African Journal of Reproductive Health - Vol 21, No 1 (2017)

    African Journals Online (AJOL)

    Alexandre Delamou, Sidikiba Sidibé, Alison Marie El Ayadi, Bienvenu Salim Camara, Thérèse Delvaux, Bettina Utz, Abdoulaye II Toure, Sah D. Sandouno, Alioune Camara, Abdoul Habib Beavogui, Asm Shahabuddin, Karen Van der Veken, Bouchra Assarag, Junko Okumura, Vincent De Brouwere, 104-113 ...

  20. 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)

  1. 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)

  2. 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)

  3. 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)

  4. 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.

  5. 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)

  6. Comparison of ionization chamber calibration for mimeographs in W/Mo and W/Al qualities; Comparacao de calibracoes de camaras de ionizacao para mamografia nas qualidades W/Mo and W/Al

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Lara; Macedo, Eric; Navarro, Marcus; Ferreira, Mario; Garcia, Igor; Pires, Evandro; Leite, Handerson; Navarro, Valeria, E-mail: larapereira@ifba.edu.br [Instituto Federal da Bahia (LABPROSAUD/IFBA), Salvador , BA (Brazil). Lab. de Produtos para Saude

    2016-07-01

    The calibration of ionization chambers for mammography laboratories seek to keep pace with technological advancement of manufacturers who have used new combinations anode/filter in mammography beyond the classic combinations of molybdenum and rhodium. This paper proposes to investigate the equivalence between calibrations of chambers different using the combinations W/Mo and W/Al at LABPROSAUD. The results showed a variation less than 1% on relationship between the calibration coefficients obtained in the evaluated combinations anode/filter for an uncertainty of 2.4%. The excellent performance of the chambers suggests a new possibility of calibration in the mammography quality at LABPROSAUD. (author)

  7. 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.

  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. 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 11...

  10. 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)

  11. 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)

  12. 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)

  13. 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.

  14. 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)

  15. 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)

  16. 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)

  17. 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)

  18. 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.

  19. Determination of the air attenuation correction factor for a free air ionization chamber; Determinacao do fator de correcao para atenuacao no ar para uma camara de ionizacao de ar livre

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Natalia F.; Cintra, Felipe B.; Castro, Maysa C. de; Caldas, Linda V.E., E-mail: nsilva@ipen.br, E-mail: fbelonsi@ipen.br, E-mail: mcastro@ipen.br, E-mail: lcaldas@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2016-07-01

    The objective of this work is to present the experimental and simulation results for the air attenuation correction factor for a free air ionization chamber with concentric cylinders of Victoreen, model 481-5. This correction factor was obtained for the standard mammography qualities established in the Instrument Calibration Laboratory (LCI) of IPEN. The values were compared with the results from the German primary standard laboratory Physikalisch- Technische Bundesanstalt (PTB), and maximum differences of 0.40% in relation to the experimental value and 0.31% in relation to the simulated value were obtained. (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. 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.

  2. 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.

  3. 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)

  4. 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.

  5. 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.

  6. 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.

  7. 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)

  8. Dosimetric verification of IMRT treatments using ionization chamber, radiographic film and gamma function;Verificacao dosimetrica de tratamentos de IMRT utilizando camara de ionizacao, filme radiografico e funcao gama

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Tatiana M.M.T.; Casagrande, Thais M.; Neves-Junior, Wellington F.P.; Mancini, Anselmo; Pelosi, Edilson L.; Haddad, Cecilia M.K.; Silva, Joao L.F. [Sociedade Beneficente de Senhoras Hospital Sirio-Libanes, Sao Paulo, SP (Brazil). Servico de Radioterapia

    2009-07-01

    This study aims to evaluate the method adopted for patient specific intensity modulated radiotherapy (IMRT) quality assurance through the verification of planned and measured dose distributions and analyzing the correlation of the results with the acceptance criteria previously established. In the planning system, the patient's complete plan is transferred to the computed tomography images of a pelvis or head and neck (HN) phantom composed of slabs of polymethylmethacrylate with an ionization chamber and radiographic film in the coronal plane. The dose measured with the ionization chamber and the dose distribution obtained with the film are compared with the planning. The comparison between measured and planned dose distributions was performed using the gamma function (gamma), assessing the percentage of points that meet the criteria of 3% dose difference and 3 mm distance to agreement. By the previous analysis of 111 plans an acceptance criteria was defined based on the average results and after that they were applied on 30 new cases. The acceptance criteria were: 1.8%+-1.4% (prostate), 2.7%+-1.9% (HN) and 2.1%+-1.7% (others) for the mean absolute errors between the doses provided by the planning system and those measured with the ionization chamber. The criteria for the average percentage of agreement (gamma<=1) between the dose distributions was 97.2%+-2.8% (prostate), 95.2%+-3.3% (HN) and 92.3%+-7.4% (others). The new analyzed cases showed mean absolute errors of 1.1%+-1.2% (prostate), 2.2%+-1.5% (HN) and 1.6%+-1.2% (others) and average percentage of agreement of 98.3%+-1.0% (prostate), 95.2%+-2.3% (HN) and 96.7%+-2.9% (others). The acceptance criteria agreed with other authors and were respected by the planning verified posteriorly. We conclude that the established acceptance criteria are appropriate for the reality of our institution, and we are able to treat the patients safely. (author)

  9. Behaviour evaluation of a small volume ion chamber in computed tomography dosimetry;Avaliacao do comportamento de uma camara de ionizacao de pequeno volume em dosimetria de tomografia computadorizada

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, L.G.; Maia, A.F.; Ferreira, C.C. [Universidade Federal de Sergipe (UFS), Aracaju, SE (Brazil). Dept. de Fisica

    2009-07-01

    The dosimetric protocol currently used has become inadequate since the advancement of multislice computed tomography. Considering this fact and recent studies that show that, the contribution of computed tomography for the collective effective dose is larger than other radiological procedures, it is necessary to define new measuring procedures and to use new detectors and phantoms. This study aimed to test the viability of using an unusual dosimeter since the pencil ion chamber, which has been used since few decades, is considered inappropriate to the new characteristics of the computed tomography beams. Therefore, tests were performed on a PMMA phantom using a small volume ion chamber with active length of 23 mm and a 100-mm-long pencil chamber. The phantom was constructed locally and it was based on the computed tomography phantom proposed by international recommendations. The comparison of tests results from both types of dosimeters (small volume ion chamber and pencil ion chamber) indicates the viability of using unusual dosimeters to perform measures computed tomography beams. (author)

  10. 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)

  11. 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)

  12. 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.

  13. 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)

  14. 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.

  15. 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)

  16. 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)

  17. 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)

  18. 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)

  19. General description and first results with the ORIS-LMRI 4 {pi} {gamma} metering chamber; Descripcion general y primeros resultados con la camara 4 {pi} {gamma} metrologica ORIS-LMRI

    Energy Technology Data Exchange (ETDEWEB)

    Tejera R, A.; Becerril V, A.; Cortes P, A

    1990-04-15

    A problem that present the ionization chambers is that the response for the radiation is global, that is to say that it cannot discriminate against selectively the relating responses at different energies, if these impact simultaneously in the active volume. This is a reason to calibrate the chambers, if is possible, with gamma monoenergetic emitting and by average calculations to complete the response curve with gamma emitting of well-known yields. To obtain the calibration coefficients and may used them, it is necessary that so much the standardized radioisotopes as the solutions by calibrating, are contained in vessels with the same geometry and the same quantity. In the exposed case, pattern solutions of 5 ml were used contained in glass cruets of 10 ml. The problem solutions are contained in same cruets to those of the patterns. The first results obtained with the ORIS-LMRI 4 {pi} {gamma} metering chamber are presented. (Author)

  20. 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)

  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. Pseudoinfarto agudo do miocárdio devido à síndrome da disfunção ventricular apical transitória (síndrome de Takotsubo Pseudo-acute myocardial infarction due to transient apical ventricular dysfunction syndrome (Takotsubo syndrome

    Directory of Open Access Journals (Sweden)

    Bruno Araújo Maciel

    2013-03-01

    Full Text Available A síndrome de Takotsubo caracteriza-se por disfunção ventricular esquerda transitória, predominantemente medioapical, desencadeada caracteristicamente por estresse físico ou emocional. Relata-se aqui o caso de uma paciente de 61 anos de idade, admitida com tontura, sudorese profusa e mal-estar súbito, após intenso estresse emocional. Exame físico e eletrocardiograma inicial foram normais, porém havia elevação de troponina I e CKMB massa. Suspeitou-se de infarto agudo do miocárdio sem supradesnivelamento do segmento ST, indicando cineangiocoronariografia de urgência. Foram evidenciados ventrículo esquerdo com hipocinesia difusa grave, balonamento sistólico medioapical e coronárias sem lesões significativas. A paciente foi encaminhada aos cuidados intensivos, evoluindo satisfatoriamente com terapia de suporte. Conforme visto, a cardiomiopatia de Takotsubo pode simular infarto agudo do miocárdio, sendo a cineangiocoronariografia importante para distinção na fase aguda. Neste caso, a paciente evoluiu com resolução espontânea da disfunção ventricular, sem sequelas.Takotsubo syndrome is characterized by predominantly medial-apical transient left ventricular dysfunction, which is typically triggered by physical or emotional stress. The present article reports the case of a 61-year-old female patient presenting with dizziness, excessive sweating, and sudden state of ill feeling following an episode involving intense emotional stress. The physical examination and electrocardiogram were normal upon admission, but the troponin I and creatine kinase-MB concentrations were increased. Acute myocardial infarction without ST segment elevation was suspected, and coronary angiography was immediately performed, which showed severe diffuse left ventricular hypokinesia, medial-apical systolic ballooning, and a lack of significant coronary injury. The patient was referred to the intensive care unit and was successfully treated with supportive therapy. As this case shows, Takotsubo syndrome might simulate the clinical manifestations of acute myocardial infarction, and coronary angiography is necessary to distinguish between both myocardial infarction and myocardial infarction in the acute stage. The present patient progressed with spontaneous resolution of the ventricular dysfunction without any sequelae.

  3. Simulação em protótipo do sistema respiratório com ventilador de pressão positiva e análise das alterações devido às obstruções do fluxo aéreo pulmonar

    OpenAIRE

    Vicentini, Alexsandra Lopes [UNESP

    2008-01-01

    A doença pulmonar obstrutiva crônica (DPOC) é um sério problema de Saúde Pública na maior parte do mundo, é uma patologia progressiva e incapacitante. No Brasil atinge de 6% a 15,8% da população com mais de 40 anos, entre 3 e 7 milhões de doentes. É responsável por 270 mil hospitalizações e cerca de 30 mil óbitos/ano. A ventilação mecânica se impõe como recurso necessário nos casos de descompensação da DPOC, porém, ainda hoje, apesar dos modernos ventiladores e do melhor conhecimento da fisio...

  4. Attenuation study of 6MV beam in post-mastectomy breast radiotherapy due to metallic heterogeneity of tissue expanders; Estudo da atenuacao do feixe de 6MV em tratamentos radioterapicos de mama pos-mastectomia devido a heterogeneidade metalica de expansores de tecido

    Energy Technology Data Exchange (ETDEWEB)

    Trombetta, Debora M.; Silva, Ademir X. da, E-mail: dtrombetta@con.ufrj.b [Universidade Federal do Rio de Janeiro (PEN/COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Programa de Energia Nuclear; Cardoso, Simone C. [Universidade Federal do Rio de Janeiro (IF/UFRJ), RJ (Brazil). Inst. de Fisica; Facure, Alessandro [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil); Rosa, Luiz A.R. da [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2010-06-15

    In this work, the effects produced in attenuation of 6 MV radiotherapic beam as consequence of metallic heterogeneities present in some types of tissue expanders, used in the process of mammary reconstruction, were studied. The study was developed through the quantification relative transmission making use of computer simulations with Monte Carlo method, using the code MCNPX. The results showed that the presence of this metallic heterogeneity alters the transmission of the beam, causing a reduction up to 20% in the geometric shadowed region. According to dosimetry protocols, the reduction in the dose should be lower of 5%. Therefore the difference found in the study could be relevant to consider the presence of heterogeneity in the irradiation field for the treatment planning. (author)

  5. Attenuation of 6 MV beam in post-mastectomy breast radiotherapy due to metallic heterogeneity of tissue expanders;Estudo da atenuacao do feixe de 6 MV em tratamentos radioterapicos de mama pos-mastectomia devido a heterogeneidade metalica de expansores de tecido

    Energy Technology Data Exchange (ETDEWEB)

    Trombetta, Debora M.; Silva, Ademir X. da [Universidade Federal do Rio de Janeiro (PEN/COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia. Programa de Energia Nuclear; Cardoso, Simone C. [Universidade Federal do Rio de Janeiro (IF/UFRJ), RJ (Brazil). Inst. de Fisica; Facure, Alessandro [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil); Rosa, Luiz A.R. da [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    In this work, the effects produced in attenuation of 6 MV radiotherapy beam as consequence of metallic heterogeneities present in some types of tissue expanders, used in the process of mammary reconstruction, was studied. The study was developed through the quantification of relative transmission making use of computer simulations with Monte Carlo method, using the code MCNPX. The results show that the presence of this metallic heterogeneity alters the transmission of the beam, causing a reduction up to 20% in the geometric shadowed region. According to dosimetry protocols, the reduction in the dose should be lower than 5%.Therefore the difference found in the study demonstrates that the consideration of the heterogeneity present in the irradiation field can be relevant for the treatment planning. (author)

  6. 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

    Directory of Open Access Journals (Sweden)

    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.

  7. 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)

  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. 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.

  10. Principais características clínicas de pacientes que sobrevivem 24 meses ou mais após uma hospitalização devido a descompensação cardíaca Major clinical characteristics of patients surviving 24 months or more after hospitalization due to decompensated heart failure

    Directory of Open Access Journals (Sweden)

    Mucio Tavares de Oliveira Jr

    2005-02-01

    Full Text Available OBJETIVO: Estudar as principais características clínicas dos pacientes com insuficiência cardíaca sobreviventes há mais de 24 meses após hospitalização para compensação. MÉTODOS: Estudados 126 pacientes com insuficiência cardíaca, em classe funcional III ou IV, com idade média de 51,7 anos, a maioria homens (73%, com fração de ejeção (FE média de 0,36 e diâmetro diastólico (DD do VE de 7,13 cm. Avaliaram-se as principais características clínicas e laboratoriais e no seguimento identificaram-se 25 (19.8% pacientes que sobreviveram mais de 24 meses após a alta hospitalar. Compararam-se os dados dos sobreviventes (G1 aos dos que faleceram (G2 antes de 24 meses. RESULTADOS: No G1 encontraram-se níveis mais elevados do sódio sérico (138,3±3,4 vs 134,5±5,8 mEq/l; p=0,001, da pressão arterial (120,0 vs 96,7 mmHg; p=0,003 e da FE do VE (0,40±0,08 vs 0,34±0,09; p=0,004 e valores menores da uréia (59,8 vs 76,3 mg/dl; p=0,007, do tempo de protrombina (12,9 vs 14,8s; p=0,001, do DDVE (6,78±0,55 vs 7,22±0,91; p=0,003 e do diâmetro do AE (4,77 vs 4,99cm; p=0,0003. Houve mais sobreviventes entre os portadores de cardiomiopatia idiopática e hipertensiva do que entre os chagásicos e doença coronariana. Na análise multivariada permaneceram como variáveis preditoras independentes da mortalidade o DDVE > 7,8 cm (HR 1,95, o Na 14 seg (HR 1,69. CONCLUSÃO: O estudo permite predizer quais os pacientes com insuficiência cardíaca que poderão apresentar uma boa sobrevida após a alta e os com maior possibilidade de longa sobrevivência após a alta.OBJECTIVE: To study the major clinical characteristics of patients with heart failure who survived more than 24 months after hospitalization for compensation. METHODS: The study comprised 126 patients with heart failure in functional class III or IV, with a mean age of 51.7 years. Most patients were men (73%, had a mean ejection fraction (EF of 0.36 and left ventricular diastolic diameter (DD of 7.13 cm. The major clinical and laboratory characteristics were assessed, and, on follow-up, 25 (19.8% patients, who survived more than 24 months after hospital discharge, were identified. Data of survivors (G1 were compared with those of patients who died (G2 before 24 months. RESULTS: In G1, the following levels were greater: serum sodium (138.3±3.4 vs 134.5±5.8 mEq/L; P=0.001; blood pressure levels (120.0 vs 96.7 mm Hg; P=0.003; and LVEF levels (0.40±0.08 vs 0.34±0.09; P=0.004; and the following levels were lower: urea (59.8 vs 76.3 mg/dL; P=0.007; prothrombin time (12.9 vs 14.8 seconds; P=0.001; LVDD (6.78±0.55 vs 7.22±0.91; P=0.003; and LA diameter (4.77 vs 4.99cm; P=0.0003. More survivors were found among patients with idiopathic cardiomyopathy and arterial hypertension than among patients with Chagas' disease and coronary artery disease. In multivariate analysis, the following variables remained as independent predictors of mortality: LVDD > 7.8 cm (HR 1.95; Na 14 seconds (HR 1.69. CONCLUSION: The study allowed predicting which patients with heart failure will have a good survival after hospital discharge and those with a greater chance of a long survival after discharge.

  11. 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.

  12. 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

    Directory of Open Access Journals (Sweden)

    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.

  13. 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

  14. 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.

  15. 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.

  16. 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

    Directory of Open Access Journals (Sweden)

    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.

  17. 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.

  18. 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...

  19. Avaliação do desenvolvimento radicular em resposta às proteínas derivadas da matriz do esmalte e à resolvina E1: estudo experimental em dentes de ratos com rizogênese incompleta e necrose pulpar

    OpenAIRE

    Scarparo, Roberta Kochenborger

    2011-01-01

    Os objetivos deste estudo foram: (a) desenvolver um modelo experimental para testar estratégias de tratamento em dentes não-vitais com rizogênese incompleta, utilizando os primeiros molares inferiores de ratos; (b) avaliar, nesse contexto, o efeito da aplicação intracanal de proteínas de matriz do esmalte (EMD) e da Resolvina E1 (RVE1). Inicialmente, o método a ser utilizado para interrupção da rizogênese foi testado, comparando-se dentes hígidos e dentes que sofreram pulpectomia em estágio i...

  20. Fenômenos relacionados a fotoativação dos compósitos restauradores odontológicos

    Directory of Open Access Journals (Sweden)

    Ricardo Danil Guiraldo

    2015-11-01

    Full Text Available Os compósitos odontológicos fotoativados por luz visível são os materiais odontológicos restauradores estéticos mais utilizados atualmente. Além disto, são matériais restauradores diretos, assim independem de trabalho laboratorial. Dentre suas vantagens estão o controle do tempo de presa e a estética, além de ser desnecessária a confecção do preparo cavitário retentivo, preservando assim a estrutura dental. Aumento da temperatura durante a polimerização pode ocorrer devido à energia de radiação fornecida pela unidade fotoativadora e reação exotérmica do compósito. Durante o processo de polimerização, o compósito sofre contração e, dependendo da velocidade da reação, essa contração pode gerar grande tensão na interface dente-restauração, desta maneira, promovendo o aparecimento de fendas e consequente falha da restauração. Além disso, para que o compósito apresente propriedades mecânicas adequadas, é necessário que ele atinja alto grau de conversão. O grau de conversão depende da quantidade de energia que é fornecida ao compósito, todavia o efeito da densidade de energia (irradiância x tempo de exposição nas propriedades mecânicas dos compósitos odontológicos ainda não esteja bem evidenciado. Insuficiente polimerização da resina composta pode gerar grande número de problemas, tais como baixa estabilidade de cor, maior pigmentação e risco de agressão ao tecido pulpar pela não polimerização de monômeros e existência de parte do material com diferentes valores de módulo de Young.

  1. Pastoralism versus Agriculturalism-How Do Altered Land-Use Forms Affect the Spread of Invasive Plants in the Degraded Mutara Rangelands of North-Eastern Rwanda?

    Science.gov (United States)

    Wronski, Torsten; Bariyanga, Jean Damascene; Sun, Ping; Plath, Martin; Apio, Ann

    2017-05-12

    Lantana camara L. (Verbenaceae) originates from tropical Central and South America and has become invasive in about 50 countries. It causes problems when invading rangelands due to its toxicity to livestock and its tendency to form dense, monotonous thickets. Its invasiveness can partly be explained by the high tannin content largely protecting the species from being browsed, its tolerance to a wide range of environmental conditions, as well as its general preference for anthropogenically disturbed habitats. The dispersal of L. camara is facilitated by birds and other animals consuming its drupes (endozoochory), and so both wild and domestic ungulates could contribute to its spread. In our study, we investigated the distribution of L. camara in the Mutara rangelands of north-eastern Rwanda, an area that faced dramatic landscape changes in recent decades. We assessed 23 ecological factors and factors related to land-use and conservation-political history. Major effects on the local abundance of L. camara were found in that the relative canopy cover of L. camara was negatively correlated with the occurrence of other shrubs (suggesting competition for space and nutrients), while encounter rates of houses, 'living fences' (Euphorbia tirucalli L.) and cattle tracks were positively correlated with L. camara cover. Hence, the spread of non-native L. camara in the Mutara rangelands appears to be linked to landscape alterations arising from the transformation of rangelands supporting traditional pastoralist communities to other agricultural land-use forms.

  2. Pastoralism versus Agriculturalism—How Do Altered Land-Use Forms Affect the Spread of Invasive Plants in the Degraded Mutara Rangelands of North-Eastern Rwanda?

    Science.gov (United States)

    Wronski, Torsten; Bariyanga, Jean Damascene; Sun, Ping; Plath, Martin; Apio, Ann

    2017-01-01

    Lantana camara L. (Verbenaceae) originates from tropical Central and South America and has become invasive in about 50 countries. It causes problems when invading rangelands due to its toxicity to livestock and its tendency to form dense, monotonous thickets. Its invasiveness can partly be explained by the high tannin content largely protecting the species from being browsed, its tolerance to a wide range of environmental conditions, as well as its general preference for anthropogenically disturbed habitats. The dispersal of L. camara is facilitated by birds and other animals consuming its drupes (endozoochory), and so both wild and domestic ungulates could contribute to its spread. In our study, we investigated the distribution of L. camara in the Mutara rangelands of north-eastern Rwanda, an area that faced dramatic landscape changes in recent decades. We assessed 23 ecological factors and factors related to land-use and conservation-political history. Major effects on the local abundance of L. camara were found in that the relative canopy cover of L. camara was negatively correlated with the occurrence of other shrubs (suggesting competition for space and nutrients), while encounter rates of houses, ‘living fences’ (Euphorbia tirucalli L.) and cattle tracks were positively correlated with L. camara cover. Hence, the spread of non-native L. camara in the Mutara rangelands appears to be linked to landscape alterations arising from the transformation of rangelands supporting traditional pastoralist communities to other agricultural land-use forms. PMID:28498334

  3. Estandarizacion de la prueba para espectrofotometria en la medicion de concentracion de semen bovino, equino, porcino, ovino y canino

    National Research Council Canada - National Science Library

    Rodriguez, P; Franco, E; Jimenez, C

    2008-01-01

    El objetivo de este trabajo fue comparar dos metodos para la medicion de concentracion espermatica, espectrofotometria y camara de neubauer, para las especies bovina, equina, porcina, ovina y canina...

  4. Neuroprotective Potential of Lantana Trifolium Ethanolic Extract ...

    African Journals Online (AJOL)

    elna

    2017-11-12

    Garg et al., ... lose vision completely each year due to the use of EMB (Bourne et al., 2013) [8]. This number ..... Pollinator Specificity in Lantana camara and L. trifolia (Verbenaceae). Biotropica, 8(4), 260–264. 16. Ocheng, F.

  5. Fuel Wood: A Conventional Source Of Energy In Mountains Of The ...

    African Journals Online (AJOL)

    ... camara in tropical region; Anogeissus latifolia, Acacia catechu and Carissa spinarum in sub-tropical region; and Quercus leucotrichophora, Myrica esculenta and Pyracantha crenulata in temperate region. Keywords: Fuel wood consumption, altitudes, Garhwal Himalaya, season. Journal of Environmental Extension Vol.

  6. Les accidents de scooter chez l'enfant au CHU Aristide Le Dantec ...

    African Journals Online (AJOL)

    Les accidents de scooter chez l'enfant au CHU Aristide Le Dantec de Dakar: à propos de 74 cas. Azhar Salim Mohamed, Gabriel Ngom, Mamadou Sow, Papa Alassane Mbaye, Souleymane Camara, Ndeye Fatou Seck, Oumar Ndour ...

  7. Indigenous knowledge of field insect pests and their management ...

    African Journals Online (AJOL)

    The anti-pest plants documented included, Capsicum frutescens, Tagetes spp, Nicotiana tabacum, Cypressus spp., Tephrosia vogelii, Azadirachta indica, Musa spp, Moringa oleifera, Tithonia diversifolia, Lantana camara, Phytollacca dodecandra, Vernonia amygdalina, Aloe spp., Eucalyptus spp., Cannabis sativa, Cofea ...

  8. Journal of Food Technology in Africa - Vol 9, No 1 (2004)

    African Journals Online (AJOL)

    The Effects of Technological Modifications on the Fermentation of Borde, ... Potential African Substitutes for Hops in Tropical Beer Brewing · EMAIL FREE FULL ... Lantana camara L. and Tephrosia vogelii Hook, on the Quality Parameters of ...

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

    National Research Council Canada - National Science Library

    Mng'ong'o, Frank C; Sambali, Joseph J; Sabas, Eustachkius; Rubanga, Justine; Magoma, Jaka; Ntamatungiro, Alex J; Turner, Elizabeth L; Nyogea, Daniel; Ensink, Jeroen H J; Moore, Sarah J

    2011-01-01

    .... 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...

  10. 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

  11. A new Ectaga Walsingham (Lepidoptera, Oecophoridae from southern South America

    Directory of Open Access Journals (Sweden)

    Vitor O. Becker

    1994-01-01

    Full Text Available Ectaga garcia, sp.n., related to E. promeces Walsingham, 1912 is described. Larvae were reared on Lantana camara, L. griesebachiana and L. montevidensis (Verbenaceae in Argentina and Brazil.

  12. Neoplasias espontaneas em ratos Wistar de um centro de criacao de animais de laboratorio do Estado do Rio de Janeiro, Brasil

    National Research Council Canada - National Science Library

    de Sousa Trotte, Marcele Nogueira; Caldas Menezes, Rodrigo; Tortelly, Rogerio

    2008-01-01

    ... de Criacao de Animais de Laboratorio, FIOCRUZ, Rio de Janeiro. Foram necropsiados 1.964 ratos Wistar, no periodo entre agosto de 2002 e janeiro de 2007, apos eutanasia em camara de gas carbonico...

  13. Prevalência dos polimorfismos do geme DLX3 em pacientes diagnosticados com taurodontismo na clínica dentária universitária de Viseu

    OpenAIRE

    Veiga, Maria Leonor de Freitas Gabão

    2012-01-01

    Introdução: O processo de desenvolvimento da dentição humana é complexo e distúrbios durante este processo dão origem a manifestações dentárias únicas. O taurodontismo é uma anomalia do desenvolvimento dentário, caracterizada pelo aumento da câmara pulpar e pelo deslocamento apical do soalho pulpar. A etiologia desta anomalia de tamanho continua incerta, contudo existem estudos que indicam a possibilidade de o taurodontismo ser geneticamente transmissível. O objectivo deste est...

  14. Interpretación fisiopatológica de los diferentes estadios de una pulpitis Physiopathological interpretation of the different pulpitis stages

    Directory of Open Access Journals (Sweden)

    Andrés O. Pérez Ruiz

    2005-08-01

    Full Text Available La caries dental que vulnera los tejidos duros del diente y compromete a la pulpa provoca un proceso inflamatorio que progresa por varias fases o estadios: pulpitis reversible, pulpitis transicional, pulpitis irreversible y pulpa necrótica. El tejido pulpar agredido por microorganismos no experimenta una necrosis repentina, sino que va sucumbiendo progresivamente, y cada uno de los estadios pulpares por los que transita el proceso, se puede ir identificando mediante el dolor con sus características semiológicas propias de cada fase, lo que permite precisar con bastante certeza el estado pulpar por el que avanza el proceso inflamatorio en dicho tejido. La interpretación fisiopatológica de los diferentes estadios pulpares por los que transita una pulpitis y el seguimiento del dolor como síntoma cardinal del proceso inflamatorio, es una forma de diagnóstico que complementa el pensamiento interpretativo del clínico que atiende estas urgencias, y le permite una mejor comprensión de su evolución y establecer así el correcto tratamiento.The dental caries that harms the hard tissues of the tooth and compromises the pulp produces an inflammatory process that progresses through various phases or stages: reversible pulpitis, transitional pulpitis, irreversible pulpitis and necrotic pulp. The pulpar tissue attacked by microorganisms does not experiment a sudden necrosis, but it progressively succumbs and each of the pulpar stages the process goes through may be identified by the pain with its own semiological characteristics of every stage, which allows to determine with enough accuracy the pulpar stage through which the inflammatory process advances in this tissue. The physiopathological interpretation of the different pulpar stages of a pulpitis and the follow-up of pain as a cardinal symptom of the inflammatory process is a form of diagnosis complementing the interpretative thinking of the clinician that gives attention to these emergencies

  15. Posibilidad regenerativa y reparadora de estructuras dentarias de células mesenquimáticas post natales

    OpenAIRE

    Siragusa, Martha

    2014-01-01

    Objetivos: Presentar evidencias clínicas de la capacidad reparativa y de la formación de nuevos tejidos mineralizados en dientes con apices incompletamente desarrollados y diagnóstico de necrosis pulpar. Ha sido demostrado que las células pulpares adultas y las del ligamento periodontal presentan un comportamiento similar en su morfología y que la superficie cellular responde positivamente a marcadores de hueso, tejido adiposo, músculos y al estroma de tejido conectivo. La posibilid...

  16. 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 ...

  17. “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...

  18. Propiedades y Usos en Odontopediatria del MTA (Agregado de Trióxido Mineral)

    OpenAIRE

    Rodríguez-Villalobos, Patricia; Bolaños López, Violeta

    2012-01-01

    El MTA es un material desarrollado para endodoncia. Es derivado del cemento Portland, (cemento hidráulico que fragua y endurece al reaccionar con  el agua conformando una masa resistente y duradera, usada en arquitectura y construcción).El MTA fue desarrollado y reportado por primera vez de uso odontológico en 1993 por Lee, Torabinejad y colaboradores.El principal uso del MTA se da en el tratamiento pulpar de dientes vitales (pulpotomías, recubrimiento pulpar directo), apicoformaciones (barre...

  19. 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.

  20. Desenvolvimento de um sensor de determinação da vitalidade dentária

    OpenAIRE

    Cerqueira, Mariana Gomes

    2013-01-01

    Apesar da diferente morfologia, os dentes partilham uma estrutura fisiológica semelhante. Todos apresentam coroa, raíz e uma cavidade pulpar no interior da qual se encontra um tecido condutor altamente vascularizado e inervado – a polpa dentária. Existem diversos factores que ameaçam a vitalidade pulpar, provocando numa primeira fase a inflamação da polpa — pulpite — e numa fase posterior a sua morte — necrose. Neste contexto, esta tese de mestrado tem por objetivo desen...

  1. 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)

  2. 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

    Directory of Open Access Journals (Sweden)

    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.

  3. 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

    Directory of Open Access Journals (Sweden)

    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.

  4. Alterações na dieta de Pterodoras granulosus (Valenciennes, 1833 (Osteichthyes, Doradidae devido a variação na abundância de uma espécie invasora de bivalve no reservatório de Itaipu, Brasil Alterations in the Pterodoras granulosus (Valenciennes, 1833 (Osteichthyes, Doradidae diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil

    Directory of Open Access Journals (Sweden)

    Angelo Antonio Agostinho

    2002-05-01

    Full Text Available Foram avaliadas as alterações na dieta de Pterodoras granulosus (Osteichthyes, Doradidae, no reservatório de Itaipu, no período de 1994 a 1998, associadas às alterações na abundância de um bivalve invasor, Corbicula fluminea, considerando-se dois eventos: (i a explosão de C. fluminea no reservatório a partir de 1994, e (ii a mortandade desse bivalvia em função das flutuações do nível de água a partir de julho/96. Os conteúdos estomacais, foram analisados pelos métodos de ocorrência e volumétrico, combinados no Índice Alimentar. A análise mostrou que C. fluminea foi o principal alimento nos anos de 94/95/96, representando aproximadamente 90% da dieta. Em 1997, houve uma queda no consumo de C. fluminea (39% da dieta, concomitante a um incremento no consumo de vegetal (26%, enquanto no ano de 98 a dieta foi composta basicamente por algas filamentosas (49% e vegetal superior (45. Estes resultados evidenciam a importância da flutuação do nível da água em reservatórios sobre a disponibilidade alimentar de P. granulosus.Variations in the diet of Pterodoras granulosus (Osteichthyes, Doradidae were evaluated from 1994 to 1998 taking into account two events that affected the abundance of an introduced bivalve Corbicula fluminae: (i the abundance explosion of the bivalve in the reservoir, started in 1994 and (ii the slaughter of the bivalve population due to fluctuations in water level, started in July 1996. Stomach contents were analyzed and results were shown considering the methods of frequency of occurrence and volumetric, combined in an alimentary index (AI. In 1994, 1995 and 1996 C. fluminae was the most consumed item, constituting about 90% of the diet. A decrease of this item intake (39% was verified in 1997, with an increase of the vascular plants intake (26%. The diet of P. granulosus changed drastically in 1998, when it became based on algae (49% and vascular plants (45. These results indicate the important role played by water level fluctuations in reservoirs, on the food availability for P. granulosus.

  5. 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

    Directory of Open Access Journals (Sweden)

    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.

  6. Abordaje biológico de la caries profunda de dentina: el tratamiento por etapas

    Directory of Open Access Journals (Sweden)

    María Inés Garchitorena

    Full Text Available El objetivo de este trabajo es abordar el diagnóstico y el tratamiento de la lesión cariosa en la dentina profunda desde un enfoque biológico y conservador. Comprender la fisiología y la histopatología del complejo dentino pulpar, así como las condiciones que mantienen activa la lesión dentinaria son elementos determinantes que deben considerarse al momento de realizar tratamientos restauradores. Se realiza una revisión bibliografica orientada al estudio o análisis de la enfermedad caries en dentina, su diagnóstico y su tratamiento en situaciones clínicas que permitan una respuesta del complejo dentino pulpar. Se propone el tratamiento por etapas como alternativa a la remoción completa de la dentina cariada profunda. Se apuesta de esta manera a la capacidad reaccional pulpar con el objetivo de evitar exposiciones pulpares, brindando al paciente un tratamiento con enfoque preventivo e integral

  7. Manejo clínico de la caries profunda

    Directory of Open Access Journals (Sweden)

    María Elia Alonso

    Full Text Available La lesión cariosa profunda por la posibilidad de afectación pulpar, es un cuadro clínico de especial significación y permanente vigencia. Su tratamiento requiere de protocolos bien establecidos, de manera que la técnica empleada pueda ser conservadora y proporcione una amplia cobertura asistencial. Es fundamental el conocimiento de la etiopatogenia, de los correctos diagnósticos de la salud pulpar, de las propiedades de bases y protectores, así como también del correcto sellado marginal de la restauración coronaria. El objetivo será siempre mantener de manera conservadora la salud pulpar, dejando a la pieza apta para su restauración en forma, función y estética. Este artículo recoge el trabajo de una comisión que sistematizó los protocolos clínicos para la Protección Pulpar Indirecta (PPI y para el Tratamiento Pulpar Indirecto (TPI, con eliminación de caries en forma diferida. Los mismos se utilizan actualmente en la Clínica Integrada de Adultos III, Facultad de Odontología, Universidad de la República (Uruguay. Se considera que el Hidróxido de Calcio (Ca(OH2 sigue manteniendo su vigencia, siendo condición necesaria de su uso una pulpa saludable y requerimientos de reacción defensiva por depósito de tejido mineralizado

  8. Analysis of dosimetry of a Gamma Knife Perfexion using polystyrene and solid water phantoms for small volume ionization chambers; Analise da dosimetria de um Gamma Knife Perfexion utilizando phantoms de poliestireno e de agua solida para camaras de ionizacao de volume pequeno

    Energy Technology Data Exchange (ETDEWEB)

    Costa, N.A.; Potiens, M.P.A., E-mail: nathaliaac@ymail.com [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Saraiva, C.W.C. [Hospital do Coracao (HCor), Sao Paulo, SP (Brazil); Benmakhlouf, H. [Stockholm University, Karolinska Hospital (Sweden)

    2016-07-01

    The Gamma Knife Perfexion (GKP) is a radiosurgery equipment that has been developed by Elekta. Its dose-rate calibration is performed using phantoms developed by Elekta and a small volume ionization chamber. The purpose of this study was to evaluate the collected charge values obtained in its dosimetry using two different phantoms, polystyrene and solid water and the ion chambers PTW Semiflex, volume 0,125 cm{sup 3}, model 31010 and PTW Pinpoint, volume 0,016 cm{sup 3}, model 31016. (author)

  9. Automated system with LabVIEW for the obtention of voltage plateau, graphic of sensitivity and operation voltage in an ionization chamber; Sistema automatizado con LabVIEW para la obtencion de meseta de voltaje, grafica de sensitividad y voltaje de operacion en una camara de ionizacion

    Energy Technology Data Exchange (ETDEWEB)

    Cruz E, P. [Instituto Nacional de Investigaciones Nucleares, Departamento de Ingenieria Electronica, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2001-07-01

    The work developed for the Laguna Verde Nuclear Power Central allows to obtain the voltage plateau, graphic of sensitivity and operation voltage of three types of ionization chambers which are used in their monitoring systems of process radiation. The automated system is based in a personal computer (Pc) for controlling and acquiring data from the different instruments used, its programming was realized with virtual instruments (LabVIEW, National Instruments software). The system also realizes a diagnosis of the ionization chamber and determine whether the parameters obtained are inside of the manufacturer specifications, that is to say, it determines when the ionization chamber must be replaced. (Author)

  10. Recommended values of the humidity correction factor k{sub n} for determining exposure in an X-ray beam with free-air chambers; Valores recomendados del factor de correccion por humedad, k{sub h} para la determinacion de la exposicion en un haz de rayos X usando camaras de paredes de aire

    Energy Technology Data Exchange (ETDEWEB)

    Los Arcos, J.M.; Brosed, A.

    1983-07-01

    The experimental values stated by CCEMRI (Section I) concerning the humidity correction factor k{sub h} required for determining exposure in an X-ray beam with free-air chambers are commented and a method to estimate k{sub n} numerically, at any particular combination of relative humidity, pressure and temperature, la explained. A table of k{sub h}, calculated for relative humidity varying from 0% to 90%, for pressures in the range of 70 kPa to 104kPa and temperatures between 15 degree centigree and 30 degree centigree, is included. (Author) 10 refs.

  11. 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)

  12. Point absorbed dose verification for volumetric modulated arc therapy plans. A comparative study between ionization microchamber and chamber array; Verificacion de dosis absorbida en un punto para planes de arcoterapia volumetrica modulada. Estudio comparativo entre microcamara de ionizacion y matriz de camaras

    Energy Technology Data Exchange (ETDEWEB)

    Caudepon Moreno, F.; Pizarro Trigo, F.; Sanchez Jimenez, J.; Nunez Martinez, L.; Morillas Ruiz, J.; Palomo Llinares, R.

    2016-10-01

    According to the international recommendations a quality control must be made for IMRT treatments before these can be delivered. These recommendations are applied to volumetric modulated arc therapy treatments in our Department. As a part of the verifications chain, measurements of absorbed dose in a phantom point and in the phantom volume are made for a specific patient with ionization chamber and ionization chambers array, respectively. The aim of this issue is to compare measurements of absorbed dose between these two kinds of detectors. The predictions of absorbed dose from Treatment Planning System are taken as the reference one. The differences among these measurements and the reference are calculated for 105 specific patients. A statistical analysis shows that the measurements of absorbed dose with chamber and array are strongly correlated. This result allows us to eliminate from our verifications chain the measurements of absorbed dose in a phantom point with ionization chamber because these ones are included in measurements of absorbed dose in the volume with a very small statistic risk. As a result, much time can be saved in the verifications process without any lack of quality. (Author)

  13. 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.

  14. Uncertainty evaluation of the kerma in the air, related to the active volume in the ionization chamber of concentric cylinders, by Monte Carlo simulation; Avaliacao de incerteza no kerma no ar, em relacao ao volume ativo da camara de ionizacao de cilindros concentricos, por simulacao de Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Lo Bianco, A.S.; Oliveira, H.P.S.; Peixoto, J.G.P., E-mail: abianco@ird.gov.b [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. Nacional de Metrologia das Radiacoes Ionizantes (LNMRI)

    2009-07-01

    To implant the primary standard of the magnitude kerma in the air for X-ray between 10 - 50 keV, the National Metrology Laboratory of Ionizing Radiations (LNMRI) must evaluate all the uncertainties of measurement related with Victtoren chamber. So, it was evaluated the uncertainty of the kerma in the air consequent of the inaccuracy in the active volume of the chamber using the calculation of Monte Carlo as a tool through the Penelope software

  15. 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

  16. 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)

  17. 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)

  18. 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)

  19. Embryo sac development in some South African Lantana species (Verbenaceae

    Directory of Open Access Journals (Sweden)

    J. J. Spies

    1984-12-01

    Full Text Available Evidence that the South African Lantana camara L. complex only produces sexual embryo sacs is provided. It is shown that the archesporium occasionally divides mitotically and that both archesporia form tetrads. The chalazal megaspore of one tetrad and the micropylar megaspore of the second tetrad develop into Polygonum type embryo sacs. L. rugosa Thunb. also forms Polygonum type embryo sacs. The L. rugosa embryo sac has a much more densely packed cytoplasm, smaller vacuole and the position of the polar nuclei differs from that of the L. camara embryo sac. It is possible to distinguish between  L. camara and  L. rugosa on their embryo sac morphology alone.

  20. Production of ethanol from lignocellulosics: an enzymatic venture

    Science.gov (United States)

    Kuila, Arindam; Mukhopadhyay, Mainak; Tuli, D.K.; Banerjee, Rintu

    2011-01-01

    The major objective of the present investigation was to evaluate the effect of enzymatic pretreatment on Lantana camara for improved yield of reducing sugar and bioethanol production. An optimum enzymatic delignification (88.79 %) was achieved after 8 h of incubation. After delignification the substrate was further treated with the mixture of carbohydratases for appropriate saccharification. The enzyme treated substrate yielded maximum reducing sugar (713.33 mg/g dry substrate) after 9 h of saccharification. Monosaccharide content in the saccharified samples were quantified using high performance liquid chromatography (HPLC) system. Using conventional yeast strain, 9.63 g/L bioethanol was produced from saccharified samples of Lantana camara. Structural changes of Lantana camara before and after enzymatic pretreatment were further investigated through Fourier transformed infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Scanning electron microscopy (SEM). PMID:27857667

  1. Transferencia microquirúrgica hemipulpar del hallux en la reconstrucción del pulgar

    Directory of Open Access Journals (Sweden)

    José-Manuel Rodríguez-Vegas

    Full Text Available Introducción y Objetivo. La transferencia hemipulpar del hallux permite excelentes reconstrucciones de pulgar porque ofrece tejidos blandos de alta calidad, contorno pulpar casi normal y recuperación sensitiva satisfactoria sin necesidad de reorientación cortical. Además, a diferencia de colgajos locales y regionales, evita la agresión adicional a una mano ya lesionada, optimizando así el período de rehabilitación y el resultado final. El artículo revisa la experiencia del autor en la técnica y compara el procedimiento con otras opciones reconstructivas. Material y Método. Realizamos una revisión retrospectiva de 16 pacientes sometidos a transferencia hemipulpar del hallux en el período 2007-2013. Todos los pacientes fueron varones, con una edad media de 34 años y una alta demanda funcional (trabajadores manuales con traumatismo laboral. La técnica fue indicada en defectos mayores del 50% de la superficie pulpar del pulgar en pacientes sin factores de riesgo asociados relevantes. En 3 de los casos el defecto pulpar asoció un defecto óseo de falange distal de tamaño suficiente para aconsejar la transferencia combinada osteo-pulpar. Resultados. Quince de los 16 colgajos sobrevivieron sin incidencias postoperatorias. Un colgajo sufrió trombosis arterial con retirada del colgajo y cirugía adicional de cobertura. En 2 pacientes se realizó revisión estética del colgajo de manera diferida. Excepto en el caso fallido, todos los pacientes volvieron a su actividad laboral previa con excelente recuperación funcional de la mano. El cierre de la zona donante se realizó mediante cierre directo (12 pacientes o injerto cutáneo (4 pacientes. Ninguno de los pacientes, independientemente del tipo de cierre del defecto en el pie, refirió problemas en la deambulación o apariencia estética del pie. Conclusiones. La reconstrucción de defectos pulpares del pulgar mediante transferencia hemipulpar del hallux permite un excelente resultado

  2. Avaliação in vitro da biomodulação de células de linhagem odontoblástica (MDPC-23) de camundongos com laser de baixa potência

    OpenAIRE

    Luciana Batista Pereira

    2009-01-01

    O laser de baixa intensidade ou terapêutico promove a biomodulação das respostas reparadoras naturais de células pulpares como os odontoblastos, sendo uma estratégia de tratamento a ser utilizada na terapia pulpar. O objetivo deste estudo foi avaliar in vitro o efeito da irradiação do laser terapêutico de arseniato de gálio e alumínio (GaAlAs) no comportamento da linhagem odontoblástica (MDPC-23) de camundongos. Células odontoblásticas foram plaqueadas na concentração de 104 células/poço (n=5...

  3. Avaliação dos efeitos diretos da radioterapia sobre a microvascularização, a inervação e a matriz extracelular da polpa dental de pacientes oncológicos

    OpenAIRE

    Karina Morais Faria

    2013-01-01

    Resumo: O tratamento do câncer de cabeça e pescoço está associado a uma série de toxicidades bucais. Neste contexto, evidências clínicas recentes demonstraram que a radioterapia em cabeça e pescoço provoca alterações na microvascularização e na inervação pulpar. Entretanto, estas alterações não foram demonstradas por meio de estudos morfológicos do tecido pulpar oriundo de pacientes oncológicos. Portanto, esta dissertação se propôs a investigar os efeitos diretos da radioterapia sobre a micro...

  4. Apexogénesis de un molar inferior permanente joven con MTA

    OpenAIRE

    Callejas Ospina, Andrés; Jaramillo Builes, William Andrés

    2013-01-01

    Introducción:Uno de los principales objetivos de la terapia endodóntica es realizar una limpieza químico-mecánica del sistema de conductos radiculares con la eliminación completa del tejido pulpar en dientes que tienen su desarrollo completo y han sufrido algún tipo de patología pulpar; sin embargo, hay casos en los que el objetivo es mantener parte de ese tejido para promover el desarrollo de las raíces en dientes que han sufrido algún tipo de afección y no han terminado aún su formación rad...

  5. Identificação do padrão de metilação nos genes IFN- e IL-10 em polpa dental humana

    OpenAIRE

    Fabiano Pereira Cardoso

    2009-01-01

    Entre os mecanismos com acoes efetoras e moduladoras da resposta imune pulpar encontram-se as citocinas. Sua regulacao depende de diversos fatores, dentre eles, os fatores epigeneticos, considerados mecanismos de controle da transcricao genica. Estes mecanismos permitem que genes sejam silenciados ou ativados, sem que haja alteracao na sequencia de nucleotideos do DNA. O processo de metilacao do DNA gera uma alteracao conformacional que impede a transcricao. O padrao de metilacao dos genes...

  6. Clinical use of mineral trioxide aggregate (MTA) in periapical lesions and the treatment of root perforations

    OpenAIRE

    Pineda Mejía, Martha Elena; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.; Silva Infantes, Manuel; Departamento Académico Medico Quirúrgico, Facultad Odontología, UNMSM.; Salcedo Moncada, Doris; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.; Castro Rodríguez, Antonia; Departamento Académico de Estomatologia Biosocial, Facultad Odontología, UNMSM.; Terán Casafranca, Liliana; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.; Ortiz Cárdenas, Eduardo; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.; Ochoa Tataje, Julio; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.; Gaitán Velásquez, Jorge; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.; Watanabe Velásquez, Romel; Departamento Académico Estomatología Rehabilitadora, Facultad Odontología, UNMSM.

    2014-01-01

    The use of MTA cement (mineral trioxide aggregate) to solve endodontics treatment complications, like pulpar floor camera perforations during root canal treatment, as well as a retrograde obturation material of apicectomy treatment, was the purpose of this investigation. White MTA Angelus, (Industria de productos odontologicos Ltda. Londrina-PR-Brazil) was used wich has 10 – 15 minutes as initial and final hardening time. The radiopacity showed by the material was somewhat superior to that of...

  7. Gross, computed tomographic and histological findings in mandibular cheek teeth extracted from horses with clinical signs of pulpitis due to apical infection.

    Science.gov (United States)

    Casey, M B; Pearson, G R; Perkins, J D; Tremaine, W H

    2015-09-01

    The most prevalent type of equine dental pulpitis due to apical infection is not associated with coronal fractures or periodontal disease. The pathogenesis of this type of pulpitis is not fully understood. Computed tomography (CT) is increasingly used to investigate equine dental disorders. However, gross, tomographic and histopathological changes in equine dental pulpitis have not been compared previously. To compare gross, CT and histological appearances of sectioned mandibular cheek teeth extracted from horses with clinical signs of pulpitis without coronal fractures or periodontal disease. To contribute to understanding the pathogenesis of equine dental pulpitis. Descriptive study using diseased and healthy teeth. Mandibular cheek teeth extracted from horses with clinical signs of pulpitis (cases), and from cadavers with no history of dental disease (controls), were compared using CT in the transverse plane at 1 mm intervals. Teeth were then sectioned transversely, photographed and processed for histopathological examination. Tomographs were compared with corresponding gross and histological sections. Cement, dentine and bone had similar ranges of attenuation (550-2000 Hounsfield Units, HU) in tomographs but could be differentiated from pulp (-400 to 500 HU) and enamel (> 2500 HU). Twelve discrete dental lesions were identified grossly, 10 of which were characterised histologically. Reactive and reparative dentinogenesis and extensive pulpar mineralisation, previously undescribed, were identified. Pulpar oedema, neutrophilic inflammation, cement and enamel defects, and reactive cemental deposition were also observed. The CT and pathological findings corresponded well where there was mineralised tissue deposited, defects in mineralised tissue, or food material in the pulpar area. Pulpar and dentinal necrosis and cement destruction, evident grossly and histologically, did not correspond to CT changes. Computed tomography is useful for identifying deposition and

  8. ANÁLISIS HISTOLÓGICO DE LA REGENERACION IN VIVO DEL COMPLEJO PULPO-DENTINARIO HUMANO CON INGENIERÍA TISULAR AUTOLOGA

    OpenAIRE

    Romero Márquez, Ricardo Manuel; Docente Colaborador del Departamento de Ciencias Básicas Estomatológicas, Curso de Patología General y del Sistema Estomatognático. Facultad de Odontología. UNMSM.

    2014-01-01

    A long time ago, dental pulp-complex regeneration was our main objective in radicular reparation which could guarantee all appropiate growth of healthy and functional tissue. The present study is about a histological assay of a new dentinal-pulp complex formation using platelet rich plasm, pulpar tissue and fibrina, all autolougus, as components of dental pulp tissular engineering treatment. Qualitative and quantitative assays about the dentin pulp-complex regeneration grade on experimental a...

  9. 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.

  10. Materiales de obturación radicular utilizados en dientes deciduos

    Directory of Open Access Journals (Sweden)

    Trejo-A

    2014-01-01

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

  11. Acciones Terapéuticas Actuales en Caries Profunda. Revisión

    Directory of Open Access Journals (Sweden)

    Diana Golubchin Libeskin

    Full Text Available Resumen Esta revisión analiza el manejo de caries dentinaria profunda, considerando los eventos histiofisiológicos y biomoleculares del complejo dentino pulpar en dientes permanentes. Se destacan recursos clínicos para evaluar el grado de progresión de la lesión y guiar la remoción de caries. Se describen la Protección Pulpar Indirecta, la Técnica de eliminación de caries en etapas y la Remoción parcial de caries presentando casos clínicos realizados en Clínica Integrada II de la Facultad de Odontología Universidad de la República (Uruguay, con sus seguimientos. Estos tratamientos sencillos y de bajo costo, al alcance de todos los clínicos, disminuyen significativamente las exposiciones pulpares. El éxito de estas acciones terapéuticas depende de una adecuada selección del caso, de la integridad de la restauración y del seguimiento dentro de un plan preventivo integral.

  12. Phytochemical and Antibacterial Properties of Leaf Extracts of ...

    African Journals Online (AJOL)

    A bioactive diterpene from Lantana camara. Phytochemistry; 45:321-324. Bibitha, B.J., Jisha, V.K., Salitha, C.V., Mohan,. S. and Valsa, A.K. (2002). Antibacterial activity of different plant extracts, short communication. Indian Journal of. Microbiology. 42:361– 363. Burkil, J.M. (1985). The useful plants of West. Africa white friars ...

  13. Composition and dynamic of benthic macroinvertebrates community ...

    African Journals Online (AJOL)

    for many fish species, amphibians and birds. (Voshell and Reese, 2002). Despite the benefits and the services that ... such as rapid expansion of urban areas and agriculture (Moore and Palmer, 2005; Kaboré et al., 2016). ... organisms and their ecology is still fragmentary (Sharma et al. 1993; George et al., 2010; Camara et ...

  14. Sciences & Nature - Vol 4, No 1 (2007)

    African Journals Online (AJOL)

    Caractérisation agronomique, économique et biophysique du continuum bas fond : cas des complexes sahéliens et soudano -sahéliens du sine-saloum au Senegal · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. M Camara, M Kebe, MM Kouame, 1-15.

  15. Dynamiques et rôle économique et social du secteur informel des ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    e) responsable du CRDI. Camara, Alioune. Financement total. CAD$ 323,984. Pays. Nord du Sahara, Sud du Sahara, Cameroun, Sénégal, Burkina Faso. Chargé(e) de projet. Dr Sylvestre Ouédraogo. Institution. Yam Pukri. Pays d' institution.

  16. Evaluation of the antidiarrhoeal activity of 80% methanol extract and ...

    African Journals Online (AJOL)

    Lantana camara L. is one of the medicinal plants traditionally used for the treatment of diarrhoea in Ethiopia. The aim of this study was to evaluate antidiarrhoeal activity of the 80% methanol extract and solvent fractions using mice model of diarrhoea. The 80% methanol extract was prepared by maceration and the fractions ...

  17. Author Details

    African Journals Online (AJOL)

    Camara, Baba Ansoumana. Vol 112 (2017) - Articles La régénération naturelle assistée : perceptions paysannes et effets agro-écologiques sur le rendement du mil (Pennisetum glaucum (L.) R. Br.) dans le bassin arachidier au Sénégal Abstract PDF. ISSN: 1997-5902. AJOL African Journals Online. HOW TO USE AJOL.

  18. Developing technology options for rice integrated crop management ...

    African Journals Online (AJOL)

    Mo

    Developing technology options for rice integrated crop management in the. Sahel Zone of West Africa: Case of irrigated rice production the Senegal River. Valley. M. Kebbeh, K. Miezan and M. Camara1. Production Economist, Breeder and Visiting Scientist in Agronomy at The Africa Rice Center (WARDA). Address: BP 96 ...

  19. Original Researc Original Research

    African Journals Online (AJOL)

    RAGHAVENDRA

    sleeper weed is the most widely spread species genus Lantana. The root system is very strong main taproot and a mat of many s. (Sankaran, 2007; Ross, 1999) It is one of the trad ... wdered root in milk and tea and flowers, locally called otects against fever and cold lier phytochemical screening nd aerial parts of L. camara.

  20. Agronomie Africaine - Vol 29, No 2 (2017)

    African Journals Online (AJOL)

    Evaluation d'alternatives d'economie d'eau dans les systemes de double riziculture irriguee a l'office du Niger (Mali) · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. B. Tangara, M. Dicko, M. Camara, N. Kamissoko, 11-22 ...