Efeito in vivo da 5-oxoprolina sobre parâmetros de estresse oxidativo em cérebro de ratos jovens

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Efeito in vitro do ácido N-acetilaspártico sobre parâmetros de estresse oxidativo em córtex de ratos jovens

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Efeito in vitro do ácido N-acetilaspártico sobre parâmetros de estresse oxidativo em córtex de ratos jovens

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UMA ANÁLISE DOS CONDICIONANTES DA SATISFAÇÃO, DA DEDICAÇÃO E DO DESEMPENHO DE ESTUDANTES DE CURSOS DE ADMINISTRAÇÃO

O objetivo do artigo é analisar os condicionantes da satisfação, da dedicação e do desempenho de estudantes do curso de administração sob uma perspectiva que avalia questões relativas à estrutura do curso e da instituição, além da reputação profissional e do curso. Após uma revisão teórica sobre os tópicos do estudo foi feito um levantamento de campo por meio de um questionário estruturado, aplicado em salas de aula de duas instituições federais de ensino superior de um estado do nordeste brasileiro; a amostra final foi de 176 respondentes. Foram aplicados procedimentos descritivos, de correlação e de análise de regressão, com a finalidade de analisar as influências supostas. Como resultado foi verificado que o desempenho dos estudantes é fundamentalmente definido por seu empenho pessoal nos estudos, praticamente não havendo maiores influências diretas de sua satisfação. Por outro lado, a satisfação dos estudantes, que mostrou ser definida pelos vários fatores analisados, é um determinante consistente do empenho dos estudantes em seus estudos

Variações de Mensuração pela Escala de Verificação: uma análise com escalas de 5, 7 e 11 pontos

This paper analyses the potential effect of multiple item scales’ number of points on the descriptive results and psychometric characteristics. A literature review was carried, followed by a field survey. The data were collected by means of 3 structured questionnaires to measure management student’s perception of profession reputation and personal identification. The metrics were adapted for scales of 5 (1 to 5), 7 (1 to 7) e 11 (0 to 10) points. The total sample had 285 respondents, and the procedures of analysis involved descriptive statistics and reliability analysis. The results indicated significant differences, although small ones, in the descriptive measures, on the other hand, the psychometric analyses had no variation related to the number of scale points. The main conclusion is that the use of scale with the 3 number of points can generate good results for researches; thus, the researcher may decide which scale use, considering the study’s needs and the sample characteristics

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora