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Search Results: 1 - 10 of 32183 matches for " Leila Marques Araújo "
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SCANNING ELECTRON MICROSCOPIC INVESTIGATION OF DENTINAL TUBULES IN MONKEY DENTIN SCANNING ELECTRON MICROSCOPIC INVESTIGATION OF DENTINAL TUBULES IN Cebus apella DENTIN
Rafael Rodrigues Lima,Leila Marques Araújo,Priscilla Rocha Affonso,Kalena Melo Maranh?o
Ciência Animal Brasileira , 2009,
Abstract: The aim of the study was to investigate the number and diameter of the Cebus apella dentinal tubules. The roots of the Cebus apella teeth were examined in specific tooth locations: the apical, middle and cervical dentin. The calculations were based on the scanning electron microscope photographs of the fractured surfaces. The results showed that the average number of dentinal tubules for each location was: 74,800 tubules/mm2 for apical root dentin, 90,000 tubules/mm2 for mid-root dentin, 91,600 tubules/mm2 for cervical root dentin. The average diameter was the following: apical root dentin, 4,30μm; mid-root dentin, 4,37μm; cervical root dentin, 5,23μm. These findings demonstrate that the Cebus apella teeth are a suitable substitute for human in endodontics studies. KEY WORDS: Dentin, dentinal tubules, teeth. The aim of the study was to investigate the number and diameter of the Cebus apella dentinal tubules. The roots of the Cebus apella teeth were examined in specific tooth locations: the apical, middle and cervical dentin. The calculations were based on the scanning electron microscope photographs of the fractured surfaces. The results showed that the average number of dentinal tubules for each location was: 74,800 tubules/mm2 for apical root dentin, 90,000 tubules/mm2 for mid-root dentin, 91,600 tubules/mm2 for cervical root dentin. The average diameter was the following: apical root dentin, 4,30μm; mid-root dentin, 4,37μm; cervical root dentin, 5,23μm. These findings demonstrate that the Cebus apella teeth are a suitable substitute for human in endodontics studies. KEY WORDS: Dentin, dentinal tubules, teeth.
A STUDY OF ROOT CANAL MORPHOLOGY OF Cebus apella TEETH ESTUDO ANAT MICO DO CANAL RADICULAR DE DENTES DE Cebus apella
Rafael Rodrigues Lima,Leila Marques Araújo,Priscilla Rocha Afonso,Suely Maria Lamar?o
Ciência Animal Brasileira , 2008,
Abstract: Realizou-se um estudo anat mico em dentes do Cebus apella, para análise da anatomia interna do canal radicular dessa espécie, normatizando seu uso como modelo experimental. Utilizaram-se doze animais adultos. Após a remo o do tecido organico, os dentes foram removidos, seccionados e fotografados, sendo analisados com um estereomicroscópio. Os resultados mostraram que os dentes apresentaram características semelhantes às dos seres humanos, mas com algumas peculiaridades, tais como: a anatomia do canal radicular variou de oval para circular; nos caninos inferiores, os canais s o semelhantes a um rim, o que reflete o contorno externo da raiz; nos molares superiores, os canais mesiobucal e distobucal s o ovais, seguindo o contorno geral do dente. Os autores concluem que esta espécie pode ser utilizada como modelo em pesquisas odontológicas, principalmente em estudos do tratamento do sistema de canal radicular. PALAVRAS-CHAVES: Anatomia, dentes, Cebus apella. An anatomic study of Cebus apella root teeth was performed to analyze the internal anatomy of permanent dentition, normalizing its use as experimental model endodontic research. Twelve adult animals were used in this study. After the removal of the organic tissue, the all teeth were removed, sectioned, analyzed and photographed with a stereomicroscope. The results showed that the anatomy of root canal of this species are similar to human dental anatomy, considering the shape, pathway and number of canals, but with some peculiarities, such as: the root canal anatomy varied from oval to circular; in the lower canines, the canals are resembled a kidney, reflecting the outside contour of the root; in the upper molars, the mesiobuccal and distobuccal canals are oval, following the general contour of the tooth. The authors conclude that this primate can be applied as models for study of root canal treatment in human beings, in special the upper central and lateral incisors, upper and lower canines and first, second, third lower premolars present single and wide canal with easy access being ideals for endodontic experiments. KEY WORDS: Anatomy, Cebus apella, teeth.
Induction of phagocytic activity and nitric-oxide production in natural populations of Trypanosoma Cruzi I and II from the state of Paraná, Brazil
Zalloum, Leila;Lala, Eliane Raquel Peres;Moreira, Neide Martins;Silveira, Thaís Gomes Verzignassi;Dalálio, Márcia Machado de Oliveira;Toledo, Max Jean de Ornelas;Gomes, M?nica Lúcia;Araújo, Silvana Marques de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2011, DOI: 10.1590/S0036-46652011000500002
Abstract: twelve strains of trypanosoma cruzi isolated from wild reservoirs, triatomines, and chronic chagasic patients in the state of paraná, southern brazil, and classified as t. cruzi i and ii, were used to test the correlation between genetic and biological diversity. the phagocytic index (pi) and nitric-oxide (no) production in vitro were used as biological parameters. the pi of the t. cruzi i and ii strains did not differ significantly, nor did the pi of the t. cruzi strains isolated from humans, triatomines, or wild reservoirs. there was a statistical difference in the inhibition of no production between t. cruzi i and ii and between parasites isolated from humans and the strains isolated from triatomines and wild reservoirs, but there was no correlation between genetics and biology when the strains were analyzed independently of the lineages or hosts from which the strains were isolated. there were significant correlations for randomly amplified polymorphic deoxyribonucleic acid (rapd) and biological parameters for t. cruzi i and ii, and for humans or wild reservoirs when the lineages or hosts were considered individually.
OS DIREITOS HUMANOS SOB A óTICA DAS DIFERENTES TRADI ES RELIGIOSAS
Giselle Marques de Araújo
Lex Humana , 2011,
Abstract: A doutrina contemporanea dos direitos humanos vem sendo construída a partir de consensos estabelecidos entre os países integrantes da Organiza o das Na es Unidas, que possibilitaram a Declara o Universal dos Direitos Humanos de 1948, aceito como mais importante documento em rela o ao tema. Neste artigo, retratamos a análise de cientistas sociais que procuram verificar se existiria uma base comum entre esta doutrina e as diferentes tradi es religiosas por eles professadas: islamismo, budismo, confucionismo e hinduísmo.Defendemos a idéia de que as identidades tradicionais precisam ser explicitadas e valorizadasno espa o público, onde a dimens o espiritual do ser humano merece ser contemplada. // The contemporary doctrine of human rights has been constructed from the consensus established among the member countries of the United Nations, which allowed the Universal Declaration of Human Rights 1948, accepted as the most important document in this regard. In this article we have depicted the analysis of social scientists who seek to verify whether there was common ground between this doctrine and the different religious traditions which they professed: Islam, Buddhism, Confucianism and Hinduism. We support the idea that identities need to be spelled traditional and valued in the public space, where the spiritual dimension of human being deserves to be considered.
Rela o materno-fetal em camundongos experimentalmente infectados pelo Trypanosoma cruzi
Araújo Silvana Marques de
Revista da Sociedade Brasileira de Medicina Tropical , 1998,
Abstract:
Resistência parcial à brusone em somaclones da cultivar de arroz CICA-8
Araújo, Leila G.;Prabhu, Anne S.;
Fitopatologia Brasileira , 2004, DOI: 10.1590/S0100-41582004000400006
Abstract: the development of rice blast resistance sources is a basic requirement for rice (oryza sativa) breeding. the main objective of this investigation was to evaluate somaclones of rice cultivar cica-8, developed from callus cultures of immature panicles for blast resistance. rice blast in 39 somaclones was assessed in the advanced generations from r5 to r7, in the blast nursery under natural conditions of infection and in greenhouse inoculation tests, using five isolates pertaining to four pathotypes (id-14, ii-1, ib-1 and ib-45) of pyricularia grisea. in the rice blast nursery, somaclones exhibited differences in disease reactions. in inoculation tests, somaclones showed differential interaction between isolates of the pathogen and genotypes. two isolates highly virulent to five somaclones including cica-8 and co 39 were selected to determine the partial resistance. there was no significant interaction between isolates and somaclones for partial resistance index, determined based on leaf lesion number per cm2. four somaclones showed significantly higher degree of partial resistance when compared with the parent cultivar cica-8.
Progresso da brusone nas folhas e características agron?micas nas gera??es avan?adas de somaclones aromáticos da cultivar de arroz IAC 47
ARAúJO, LEILA G.;PRABHU, ANNE S.;
Fitopatologia Brasileira , 2001, DOI: 10.1590/S0100-41582001000300005
Abstract: field trials were conducted over three seasons with somaclones derived from the upland rice (oriza sativa) cultivar iac 47. variation for rice blast resistance and other agronomic traits were assessed in the advanced generations of r5, r6, and r7. the slow blasting resistance was evaluated based on the area under disease progress curve (audpc) and apparent infection rate (r). the correlations between r6 and r7 generations in relation to audpc as well as r were positive and highly significant. somaclones also showed two distinct plant types, one with erect bright green leaves and other with droopy yellow green leaves different from the plant type of cultivar iac 47 which is characterized by droopy pale green leaves. all somaclones exhibited aromatic grain characteristic. somaclones also showed variation in grain type, height, growth duration, panicle grain weight and grain yield. two somaclones scia02 and scia06 were identified that showed slow blasting resistance, early growth duration, and high yield potential compared to the parent cultivar iac 47 besides the aromatic grain characteristic and plant type with erect bright green leaves. they can be used as new blast resistant sources for upland rice improvement.
Progresso da brusone nas folhas e características agron micas nas gera es avan adas de somaclones aromáticos da cultivar de arroz IAC 47
ARAúJO LEILA G.,PRABHU ANNE S.
Fitopatologia Brasileira , 2001,
Abstract: Foram conduzidos experimentos de campo por três anos utilizando somaclones da cultivar de arroz (Oriza sativa) de terras altas IAC 47. A varia o para resistência à brusone e para outras características agron micas foram avaliadas nas gera es avan adas de R5, R6 e R7. O progresso lento da brusone foi medido baseado na área sob a curva de progresso de doen a (ASCPD) e taxa aparente de infec o (r). As correla es nas gera es R6 e R7 em rela o a ASCPD e r foram positivas e altamente significantes. Os somaclones também mostraram dois tipos distintos de plantas, um com folha ereta verde escura e outro com folha decumbente verde-amarela, arquiteturas diferentes do tipo de planta da cultivar IAC 47, a qual é caracterizada por folha decumbente verde-palha. Todos os somaclones exibiram característica aromática do gr o. Os somaclones mostraram também varia o para tipo de gr o, altura, dura o do ciclo, peso de gr os de 100 panículas e produtividade. Foram identificados dois somaclones SCIA02 e SCIA06 que mostraram progresso lento de doen a, precocidade e alto potencial de produtividade, comparados à cultivar parental IAC 47, além de possuir característica aromática e tipo de planta com folha ereta verde-escura. Estes somaclones podem ser utilizados como novas fontes de resistência à brusone no melhoramento de arroz de sequeiro.
Resistência parcial à brusone em somaclones da cultivar de arroz CICA-8
Araújo Leila G.,Prabhu Anne S.
Fitopatologia Brasileira , 2004,
Abstract: A obten o de novas fontes de resistência à brusone é requerimento básico para melhoramento do arroz (Oryza sativa). O objetivo do trabalho foi avaliar, para resistência à brusone, 39 somaclones da cultivar CICA-8, desenvolvidos a partir de calos de panículas imaturas. Os somaclones, nas gera es avan adas de R5 a R7, foram avaliados sob condi es naturais de infec o e em testes de inocula o artificial em casa de vegeta o, utilizando cinco isolados, pertencentes a quatro patótipos (ID-14, II-1, IB-1 e IB-45) de Pyricularia grisea. No viveiro de brusone os somaclones apresentaram diferentes rea es à doen a. Nos testes de inocula o os somaclones mostraram intera o diferencial com os isolados do patógeno. Dois isolados altamente virulentos a cinco somaclones foram selecionados para determinar a resistência parcial. N o houve intera o significativa entre genótipos e isolados para o índice de resistência parcial determinado com base no número de les es/cm2 de folha. Quatro somaclones mostraram graus significativamente maiores de resistência parcial à brusone quando comparados à cultivar parental CICA-8.
Trypanosoma cruzi infection in offspring born to chagasic C3H/He mice
Araújo, Silvana Marques de;Chiari, Egler;
Memórias do Instituto Oswaldo Cruz , 1996, DOI: 10.1590/S0074-02761996000200017
Abstract: this study reports the effects of trypanosoma cruzi infection induced in c3h/he male and female mice born to chagasic mice. an experimental model was established infecting female c3h/he mice with a low virulent t. cruzi clone. in this model, mating, fertilization, pregnancy evolution and delivery was carried out successfully. the offspring was infected at four, six and eigth weeks of age. the results showed that the offspring born to chagasic mothers present decreased resistance to acquired t. cruzi infection. this decreased resistance was expressed by higher levels of parasitaemia and higher mortality rates in offspring born to chagasic mothers than in controls. age and sex were shown to be important factors of this phenomenon. the results suggest that maternal immune system products can modulate the immune response of the offspring.
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