Formação de recursos humanos: estagiários, iniciação científica, mestres, doutores e pós-doutores orientados na Embrapa Instrumentação.

bitstream/item/128894/1/capa-livro-rh-novo-29-05-2015.pdf; bitstream/item/128896/1/Embrapa-RH-16-06-2015.pdf2. ed. rev. ampl

History and philosophy of science in Biology teaching

Neste trabalho, buscamos evidenciar a concepção de História da Biologia que é veiculada nos livros didáticos. Para tanto, analisamos três coleções de livros de Biologia destinados ao Ensino Médio, e alguns livros universitários usados em cursos de formação de professores. Ao analisar este material curricular foi possível observar que a história apresentada é desvinculada do contexto cultural de cada período histórico, o que pode levar o aluno a construir uma falsa representação da ciência e do fazer científico.In this work, we search forto evidences the conception of the History of Biology being is propagated in textbooks. We analyze three Biology book collections designed estined forto middle schooledium education, and some university books used in teacher education courses. When analyzing this curricular material it was possible to observe that the history of biology presented is disengaged from entailedofthe cultural context of each historical period, and this what can lead the student to construct a false representation of science and of scientific meaning making

Performance related factors are the main determinants of the von Willebrand factor response to exhaustive physical exercise

Background: Physical stress triggers the endothelium to release von Willebrand Factor (VWF) from the Weibel Palade bodies. Since VWF is a risk factor for arterial thrombosis, it is of great interest to discover determinants of VWF response to physical stress. We aimed to determine the main mediators of the VWF increase by exhaustive physical exercise. Methods: 105 healthy individuals (18-35 years) were included in this study. Each participant performed an incremental exhaustive exercise test on a cycle ergometer. Respiratory gas exchange measurements were obtained while cardiac function was continuously monitored. Blood was collected at baseline and directly after exhaustion. VWF antigen (VWF:Ag) levels, VWF collagen binding (VWF:CB) levels, ADAMTS13 activity and common variations in Syntaxin Binding Protein-5 (STXBP5, rs1039084 and rs9399599), Syntaxin-2 (STX2, rs7978987) and VWF (promoter, rs7965413) were determined. Results: The median VWF:Ag level at baseline was 0.94 IU/mL [IQR 0.8-1.1] and increased with 47% [IQR 25-73] after exhaustive exercise to a median maximum VWF:Ag of 1.38 IU/mL [IQR 1.1-1.8] (p<0.0001). VWF:CB levels and ADAMTS13 activity both also increased after exhaustive exercise (median increase 43% and 12%, both p<0.0001). The strongest determinants of the VWF:Ag level increase are performance related (p<0.0001). We observed a gender difference in VWF:Ag response to exercise (females 1.2 IU/mL; males 1.7 IU/mL, p = 0.001), which was associated by a difference in performance. Genetic variations in STXBP5, STX2 and the VWF promoter were not associated with VWF:Ag levels at baseline nor with the VWF:Ag increase. Conclusions: VWF:Ag levels strongly increase upon exhaustive exercise and this increase is strongly determined by physical fitness level and the intensity of the exercise, while there is no clear effect of genetic variation in STXBP5, STX2 and the VWF promoter

Ingenium:\u2028 an exploratory research on learning processes specific to robotic labs

The Ingenium project is an exploratory research that investigates the processes of learning in robotics laboratories frequented by students aged between 13 and 19 years with the aim of improve teaching in educational contexts. The study highlights the specific learning processes involved in robotics labs and how they affect positively on overall school performance

Working with Research Integrity-Guidance for Research Performing Organisations: The Bonn PRINTEGER Statement

This document presents the Bonn PRINTEGER Consensus Statement: Working with Research Integrity-Guidance for research performing organisations. The aim of the statement is to complement existing instruments by focusing specifically on institutional responsibilities for strengthening integrity. It takes into account the daily challenges and organisational contexts of most researchers. The statement intends to make research integrity challenges recognisable from the work-floor perspective, providing concrete advice on organisational measures to strengthen integrity. The statement, which was concluded February 7th 2018, provides guidance on the following key issues: § 1. Providing information about research integrity § 2. Providing education, training and mentoring § 3. Strengthening a research integrity culture § 4. Facilitating open dialogue § 5. Wise incentive management § 6. Implementing quality assurance procedures § 7. Improving the work environment and work satisfaction § 8. Increasing transparency of misconduct cases § 9. Opening up research § 10. Implementing safe and effective whistle-blowing channels § 11. Protecting the alleged perpetrators § 12. Establishing a research integrity committee and appointing an ombudsperson § 13. Making explicit the applicable standards for research integrity.status: publishe

Avaliação da resistência residual de lajes alveolares em concreto armado em uma edificação industrial após incêndio

O concreto, durante exposição a elevadas temperaturas, caracteriza-se pela baixa difusividade térmica e incombustibilidade,resultando em desempenho satisfatório frente ao fogo. Todavia, constatam-se transformaçõesquímicas e físicas em seus componentes. A estabilidade do composto relaciona-se com a microestrutura,portanto consegue-se verificar a degradação do material através de técnicas avançadas de análise microestrutural.Neste contexto, o uso de ensaios no material, como a difratometria e fluorescência de raios X, mostraseatraente. Neste artigo, é descrita a inspeção de laje alveolar pré-fabricada de uma edificação industrial, aqual sofreu exposição às altas temperaturas provindas de um incêndio no subsolo da edificação. Avaliou-se oelemento estrutural através de ensaios de caracterização química, em diferentes espessuras da laje de concreto,estimando a temperatura alcançada em cada camada e, consequentemente, a perda de resistência do elementoestrutural. A partir dos resultados, constatou-se a temperatura de, aproximadamente, 700 ºC na superfícieda laje e menos de 100 ºC nas camadas mais profundas. Estimou-se a redução na resistência à compressãodo concreto na ordem de 25 % na camada de 20 mm e redução praticamente desprezável na região dosfios protendidos, atestando a segurança estrutural da estrutura após o sinistro