975 resultados para Fração idea
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The crisis of globalization has given renewed topicality to the idea of development as a complex process involving social and institutional changes as well as a variety of democratic learning processes. Placed at the margin of the international academic and political debate, the political economy of development can come back into its own if academics and politicians responsible for the economy are forced to think for the long term. The political economy of development needs to be twinned with politics so that what we understand by the general interest can be reconfigured in pursuit of freedom, justice and democracy. These can be the keys to turning globalization, whose essence is openness and interdependence, into an active agent in the development of national density, something that is indispensable if we are to think critically about reality and, as Prebisch taught and practised, set history on a future-creating course.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Biociências e Biotecnologia Aplicadas à Farmácia - FCFAR
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Estudos experimentais evidenciam o potencial promissor das células da fração mononuclear da medula óssea (CMN-MO) no tratamento de modelos de isquemia cerebral. Sabe-se que as CMN-MOs são sensíveis à modificações microambientais, tal qual aquelas induzidas por uma isquemia, como eventos associados à inflamação. Contudo, pouco se conhece a respeito da biodistribuição e sobrevida dessas células no tecido nervoso pós-lesão. Objetiva-se investigar se a sobrevivência e a disseminação das CMN-MOs são influenciadas pela resposta inflamatória após isquemia estriatal. Parecer CEPAE, protocolo nº 073/12. Transplante heterólogo (5x105 de CMN-MOs) no estriado de ratos Wistar, agrupados entre controles não-tratados (IST) e falso-operado (FO) e tratados (ITCM), perfundidos em 1, 3, 7 e 28 dias. CMN-MO foram impregnadas com Nanocristais Qdot para posterior identificação por microscopia de fluorescência no tecido do receptor. Coloração, por violeta de cresila, e imunoistoquímica básica (IBA1 e ED1) foram aplicadas para análise histopatológica do tecido em microscopia de luz. Testes neurocomportamentais (teste de remoção do adesivo e teste do cilindro) foram realizados para aferir a resposta dos grupos às intervenções. Os achados histopatológicos evidenciam a eficiência do modelo experimental de indução isquêmica em reproduzir a lesão no estriado dorsolateral. O infiltrado celular no grupo IST marca a resposta inflamatória, posteriormente confirmada por imunoistoquímica para ED1 e IBA1; o infiltrado celular no grupo ITCM, evidencia a permanência das CMN-MO em todas as sobrevidas estudadas. O perfil de perda por morte das CMN-MO transplantadas no sítio de lesão é semelhante entre os grupos ITCM e FO, contudo, evidencia que resposta inflamatória do receptor causa maior decaimento do montante celular no grupo ITCM. Procedimentos de infusão celular mais refinados ou automatizados podem melhorar a sensibilidade dos testes comportamentais para discriminar a evolução entre os grupos estudados. Conclui-se que a alteração do microambiente pós-isquemia cria condições que determina a dispersão e a sobrevivência das CMN-MO. Outras análises de imunoistoquímicas podem apontar resultados quanto ao perfil microglial presentes nas sobrevidas estudadas e o grau de imunomodulação pelo estudo da dinâmica das citocinas inflamatórias produzidas.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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In agriculture, the search for higher crop yields based on sustainable soil management has led to a gradual pursuit of knowledge of the variables related to production systems. The identification of the causes of variability of these properties has become a part of strategic planning in the sugar and ethanol industry. This study investigated the spatial variability of iron oxides in the clay fraction and its relationship to soil physical and chemical properties in different sugarcane cultivation systems in the region of Ribeirão Preto, São Paulo State. Two 1-ha plots were outlined in areas with mechanical and manual harvesting systems. Soil samples were taken at 126 points from the 0.00-0.25 m layer in both areas. The mineralogical and chemical data were subjected to geostatistical analyses, to determine the spatial dependence, semivariograms and kriging maps of the properties. To analyze the correlation between the parameters cross-semivariograms were constructed. The spatial variability of chemical properties was greater in areas with mechanical harvesting than burnt harvesting (manual harvesting), whereas the range of the mineralogical properties was largest in the area of green-harvested sugarcane. The properties organic matter, mean crystal diameter goethite had a negatively spatial correlation, while clay was positive correlated with P sorption in the two sugarcane harvest systems.
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Pós-graduação em Doenças Tropicais - FMB
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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In the second half of the last century the automobile industries suffered from the petroleum crisis caused mainly by the wars in the Middle East. These crises led the automakers rethink their vehicles. One of the most important events after that was the adoption of new steels by the industry. One example is the TRIP steels (Transformationinduced plasticity). It is known that the macroscopic behavior of a material is strongly dependent on its microstructure and therefore the quantitative metallography is important to understand and relate the material properties to its microstructure. In this work, different specimens of TRIP steels were etched using LePera reagent. The obtained images were analyzed using digital processing. Using the ImageJ software the methods threshold and watershed were studied as well as a comparison with the ASTM E562 standard. The methods were compared and finally the morphological characteristics and volumetric fraction of the retained austenite and martensite phases were analyzed. The results showed that the threshold led to a higher number of identified grains with lower mean area and total area fraction than the watershed method and ASTM standard
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After confirming the high specific mechanical properties of composite materials by scientific studies conducted over the last decades, one of the challenges of this new class of materials is the ability to achieve mass production at a more affordable cost, which has become indispensable. The Resin Transfer Molding (RTM) is an excellent method for manufacturing composite materials. Despite being a process widely used by international companies in the production of high performance structural composites, only a short time the national aviation industry has shown interest in implementing this type of processing to more complex structures and greater structural responsibility. In aeronautical projects, the reproducibility and the relative low cost of this process, several studies have been performed in Brazil for learning and perfecting this technique. This process is suitable for producing polymer components both simple as complex geometry, and allows to achieve consistent thickness, with high quality finish and without limiting range. Polymeric composite components for the high mechanical stress applications such as aircraft structures, satellites, etc., require a strict control of volume fractions of the composite constituents, beyond the knowledge of their mechanical and thermal properties. Therefore, in this experimental work degree study on the mechanical, thermal and of porosity composites processed by RTM processed characterization was performed. This characterization was performed targeting a possible aerospace application of this composite material. For the production of composites, process equipment (RTM RTM injector Radius 2100cc) was used. The processed carbono/epoxy composites were characterized via flexure tests mechanically and thermally analysis via DMA, DSC and TGA. To determine the volume fraction of fibers, the composite samples were analyzed via matrix digestion (ASTM D3171) ... (Complete abstract click electronic access below)
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Sedentary habits or insufficient activities to promote health benefits can influence the occurrence of chronic diseases. The cardiovascular risk factors arise, at least partially, from the individual-environment interaction during life, and worsen with aging and lack of physical exercise. Health promotion and prevention are among the greatest challenges of public health policies. However, physical activity turns out to be rarely recommended and, thus have a very poor adhesion. In spite of consensus about the benefits of physical activity in both primary and secondary prevention, only 32% of adults and 66% of children and adolescents, according to Healthy People 2010 guideline, practice leisure-time physical activity. Thus, the regular practice of physical activity and healthy habits require changes in basic concepts in government and social policies. The higher involvement of public and private sectors related to health and education, the more expressive would be the reduction in socioeconomic costs and the improvement in quality of life.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)