189 resultados para bibliografia regina Cristina
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Measures to control the cattle tick, Rhipicephalus (Boophilus) microplus, based only on chemical products are becoming unsustainable, mainly because of the development of resistance. The objective of this study was to test the effect of the aqueous extract of pineapple skin (AEPS) and bromelain extracted from the stem (Sigma-Aldrich®, B4882) on engorged females and larvae of R. (B.) microplus in vitro. These substances were diluted in water and evaluated at eight concentrations. Engorged females were collected and distributed in groups of 10, with three repetitions for each treatment. After immersion in the solutions, the females were placed in an incubator for observation of survival, oviposition and larval hatching. The larval packet method was used, also with three repetitions with about 100 larvae each. The packets were incubated and the readings were performed after 24h. The estimated reproduction and efficacy of the solutions were calculated. The LC50 and LC90 were estimated using the Probit procedure of the SAS program. The eight concentrations were compared within each treatment by the Tukey test. For the experiment with engorged females, the most effective concentrations were 125, 250 and 500mg/mL: 33%, 48% and 59% for the AEPS and 27%, 51% and 55% for the bromelain. The LC50 and LC90 values were, respectively, 276 and 8691mg/mL for AEPS and 373 and 5172mg/mL for bromelain. None of the dilutions tested was effective against the larvae of R. (B.) microplus. This is the first report of the action of pineapple extracts or their constituents on cattle ticks. The results demonstrate that further studies regarding composition of tick cuticle, with evaluation of other solvents and formulations, should be conducted seeking to enhance the effect of pineapple extracts and compounds against this ectoparasite. © 2013 Elsevier Inc.
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The present study aimed to examine the effects of thyroid hormone (TH), more precisely triiodothyronine (T3), on the modulation of leptin mRNA expression and the involvement of the phosphatidyl inositol 3 kinase (PI3K) signaling pathway in adipocytes, 3T3-L1, cell culture. We examined the involvement of this pathway in mediating TH effects by treating 3T3-L1 adipocytes with physiological (P=10nM) or supraphysiological (SI=100 nM) T3 dose during one hour (short time), in the absence or the presence of PI3K inhibitor (LY294002). The absence of any treatment was considered the control group (C). RT-qPCR was used for mRNA expression analyzes. For data analyzes ANOVA complemented with Tukey's test was used at 5% significance. T3 increased leptin mRNA expression in P (2.26 ± 0.36, p< 0.001), SI (1.99 ±0.22, p< 0.01) compared to C group (1± 0.18). This increase was completely abrogated by LY294002 in P (1.31±0.05, p< 0.001) and SI (1.33±0.31, p< 0.05). Western blotting confirmed these results at protein level, indicating the PI3K pathway dependency. To examine whether leptin is directly induced by T3, we used the translation inhibitor cycloheximide (CHX). In P, the presence of CHX maintained the levels mRNA leptin, but was completely abrogated in SI (1.14±0.09, p> 0.001). These results demonstrate that the activation of the PI3K signaling pathway has a role in TH-mediated direct and indirect leptin gene expression in 3T3-L1 adipocytes. © 2013 Oliveira et al.
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The development of resistance to anthelmintics has prompted research into alternative methods of controlling intestinal nematodes in ruminants. This study aimed to assess the activity of Ananas comosus on Haemonchus contortus in Santa Inês sheep. The aqueous extract of pineapple skin (AEPS), bromelain from pineapple stems (B4882) and residue from pineapple processing was evaluated in in vitro and in vivo tests. The enzymatic activity of substances was analyzed by the azocasein method. The egg hatch test (EHT) and larval development test (LDT) were performed using the Embrapa2010 isolate of H. contortus. In the in vivo test, 36 sheep artificially infected with H. contortus were divided into six groups: G1: 2g/kg BW of the aqueous extract administered for three days; G2: 2g/kg BW of the industrial pineapple residue for 60 days; G3: 180mg/animal of bromelain in a single dose; G4: negative control I; G5: positive control (levamisole phosphate); and G6: negative control II. The eggs per gram (EPG) in the feces were counted till 28 days after treatment. LC50 and LC90 were obtained by the probit procedure, while the in vivo test results were analyzed by GLM. The aqueous extract in the in vitro and in vivo test, the bromelain and industrial residue presented 0.102, 0.157, 1.864 and 0.048 enzyme units/mL, respectively. In the egg hatch test, the LC50 and LC90 were respectively 31 and 81mg/mL for the aqueous extract and 0.50 and 2mg/mL for bromelain. In the larval development test, the LC50 and LC90 were respectively 1.7 and 7.3mg/mL for the aqueous extract and 0.019 and 0.086mg/mL for bromelain. In the in vivo test, the general efficacies of the treatments in relation to the negative control were 22.6%, 42.2%, 3.65% and 89% for the aqueous extract, industrial pineapple residue, bromelain and positive control respectively. The transformed EPG values were 3.19±0.59, 3.32±0.25, 2.85±0.66, 3.44±0.50, 2.28±0.93 and 2.75±0.94 for the aqueous extract, industrial residue, bromelain, negative control I, positive control and negative control II respectively. The results for all the treated groups differed significantly (p<0.05) from the positive control, and although the residue presented efficacy of 42.2%, there was no statistical difference (p>0.05) in relation to the negative control. Therefore, both the aqueous extract and bromelain were effective in vitro, but showed reduced anthelmintic efficacy in vivo. For the pineapple residue, the 42.2% in vivo efficacy in reducing the EPG and the possibility of reducing environmental contamination through reuse of industrial residue indicate it can also be useful for control of this parasite. © 2013 Elsevier B.V.
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Pós-graduação em Educação - FFC
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Pós-graduação em Letras - FCLAS
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Música - IA
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Pós-graduação em Saúde Coletiva - FMB
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Este e-book é uma produção do Programa de Pós-Graduação em Educação Para a Ciência - PPGEC - da Faculdade de Ciências da UNESP, campus de Bauru, e faz parte do Programa de Publicações Digitais da Pró-Reitoria de Pós-Graduação, em parceria com a Fundação Editora da UNESP, que tem como principal objetivo a divulgação de pesquisas realizadas pelos Programas de Pós-Graduação da universidade. A série Ensino de Ciências e Matemática teve início em 2009 e visa, por meio de pesquisas oriundas de teses, dissertações e de grupos de pesquisa, divulgar e fomentar a discussão sobre processos de ensino de Ciências e Matemática analisada a partir de diferentes perspectivas teóricas e metodológicas. Essa série abarca temáticas recentes que estão sempre presentes nas discussões de importantes eventos científicos, nacionais e internacionais, da área da Educação para a Ciência e Matemática. Entre esses temas destacam: formação de professores, formação de conceitos, Tecnologias da Informação, processos de ensino, entre outros. Esta obra é intitulada Ensino de Ciências e Matemática IV: temas de investigação porque veicula pesquisas que abordam temas atuais e importantes estudados por pós-graduandos e docentes do Programa, como, por exemplo, avaliação, prática de ensino, robótica, prática pedagógica, TV digital, educação desenvolvida em âmbito não-escolar, entre outros. Tais investigações são resultados de pesquisas desenvolvidas no Programa: algumas são resultados de teses e dissertações e outras foram produzidas por grupos de pesquisa. Professores que ensinam Ciências e Matemática, em diferentes níveis de escolaridade, e pesquisadores que desenvolvem estudos nessas áreas poderão ter fácil acesso a esta obra, uma vez que estará disponível na Internet, o que pode contribuir para o debate sobre ...
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Organizado por Ana Maria de Andrade Caldeira, este livro é composto por 16 capítulos escritos por professores e pós-graduandos de diversas especialidades científicas. Eles procuram problematizar questões fundamentais para o ensino de disciplinas como Biologia, Física e Matemática. Os autores apresentam estudos teóricos e empíricos com conteúdos extraídos da História e Filosofia das Ciências, tentando, ao mesmo tempo, lançar um olhar para a sala de aula, localizando e criticando conceitos que, eventualmente, são trabalhados de forma distorcida ou inadequada, com reflexos diretos e negativos na prática docente e na disseminação do conhecimento científico. Organizado de forma didática, o livro se divide em quatro grandes subáreas, cada uma delas agrupando estudos sobre diversos temas afins da Matemática, Física, Química e Biologia, respectivamente. O fio condutor da obra está na interface que todos os autores constroem entre o tema discutido e a História ou a Filosofia referentes aos quatro grandes blocos que o livro aborda. Embora denso e bastante específico, trata-se de um trabalho de leitura agradável.
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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC
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This was a qualitative study with the purpose of designing a meta-model for the work process of the Family Health Strategy (FHS) team. It was based on the experience of six sample groups, composed of their members (physicians, professional nurses, dentists, dental assistants, licensed technical nurses and community health agents) in a city in São Paulo state, Brazil, totaling 54 subjects. Six theoretical models emerged from non-directive interviews. These were analyzed according to Grounded Theory and submitted to the meta-synthesis strategy, which produced the meta-model between the processes of strengthening and weakening of the FHS model: professional-team-community reciprocity as an intervening component. When analyzed in light of the Theory of Complexity (TC), it showed to be a work with a vertical and authoritarian tendency, which is largely hegemonic in the tradition of public health care policies.
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A esclerose múltipla (EM) é uma doença inflamatória, autoimune, desmielinizante e degenerativa do sistema nervoso central. Estudos epidemiológicos têm identificado associações de hipovitaminose D com doenças autoimunes. O principal objetivo desta revisão é responder se há evidências que indiquem o uso terapêutico de vitamina D em monoterapia para pacientes com EM. Por meio dos sites PUBMED, EMBASE, LILACS e Scielo foram realizadas buscas usando os descritores “vitamin D”, e “multiple sclerosis” até 12/09/2013. Estudos clínicos randomizados, controlados e duplo-cegos foram selecionados para avaliar a resposta terapêutica da vitamina D na EM. Não foram encontradas evidências científicas que justifiquem o uso da vitamina D em monoterapia no tratamento da EM, na prática clínica.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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O livro Gestão, mediação e uso da informação vai ao encontro dos estudos teóricos e metodológicos de objetos e fenômenos que envolvem a gestão, a mediação, uso e apropriação da informação em distintos ambientes