115 resultados para bronze bug
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Pós-graduação em Agronomia - FEIS
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Pós-graduação em Estudos Literários - FCLAR
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
cis-Jasmone e Tween 20 na indução de metabólitos secundários em soja e seus efeitos em insetos-praga
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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The invention of a process for producing synthetic melanin is described, as well as the respective product obtained. More specifically, the invention comprises aqueous synthesis of melanin by oxidation of the melanin precursor (L-DOPA) using a hydrothermal reactor.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Agronomia (Produção Vegetal) - FCAV
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The research involving new materials has always been considered as a differential in the development of a technology company. This occurred naturally since ancient times, often motivated by reasons of a certain age, where the most common material used was also the name of your time and may be cited as an example the Bronze Age, and later was the Iron. Currently, the use of firearms are they used in resolving conflicts between countries, or a more equivocal, as an instrument of social banditry make innovations in the area of shielding welcome, whether for personal use, in the form of vests or vehicle such as cars, tanks and even aircraft. In this context, is a Silicon Carbide Ceramic, with low density and high hardness. Thus, the aim of this study is the evaluation and comparison of these materials, seeking to improve their properties by means of additives such as boron and silicon metal and amorphous YAG. For this work, the specimens were pre-shaped by means of uniaxial later to be referred for isostatic pressing and sintering. The maximum percentage for each additive was 5%, except for the YAG whose percentage was 8.2% (mass percentage). All compositions were subjected to the same tests (x-ray diffraction, apparent density, optical microscopy, Vickers hardness, scanning electron Microscopita), so that one could draw a comparison between the materials under study, samples that showed better mechanical properties and micro structural, related here by hardness testing and microscopy (optical and SEM) were the silicon carbide doped with YAG and alumina samples, demonstrating the potential of these materials for ballistic protection. Other compositions have high porosity, which is highly undesirable, since in order to harmful influences on the mechanical properties discussed below
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Coordenação de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
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Pós-graduação em Letras - IBILCE
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Pós-graduação em Engenharia Mecânica - FEG
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Pós-graduação em Agronomia (Proteção de Plantas) - FCA