Fuel Elements
Mostrando 37-45 de 45 artigos, teses e dissertações.
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37. Metallic materials in solid oxide fuel cells
Fe-Cr alloys with variations in chromium content and additions of different elements were studied for potential application in intermediate temperature Solid Oxide Fuel Cell (SOFC). Recently, a new type of FeCrMn(Ti/La) based ferritic steels has been developed to be used as construction material for SOFC interconnects. In the present paper, the long term oxi
Materials Research. Publicado em: 2004-03
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38. DETERMINATION OF REFRACTORY ELEMENTS IN USED LUBRICATING OIL AND IN FUEL OIL BY ICP OES WITH EMULSIFIED SAMPLES / DETERMINAÇÃO DE ELEMENTOS REFRATÁRIOS EM ÓLEO LUBRIFICANTE USADO E EM ÓLEO COMBUSTÍVEL POR ICP OES APÓS EMULSIFICAÇÃO DA AMOSTRA
O conhecimento da concentração dos elementos traço em óleo lubrificante usado é útil para a avaliação de desgastes de componentes específicos de motores.Em óleo combustível, este monitoramento permite avaliar a qualidade do combustível e prever o potencial das emissões de metais no meio ambiente. Neste trabalho, utilizou-se a espectrometria de e
Publicado em: 2003
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39. RazÃes da expansÃo dos cursos de especializaÃÃo : um olhar a partir da UFPE
The goal in this study is to identifyg and analyze the main reasons behind the expansion of specialization courses administered at Universidade Federal de Pernambuco, NE Brazil, and study the concepts that support âlatu sensuâ postgraduate policies that fuel the expansion process. Semi-structured interviews were used with coordinators and lecturers in the
Publicado em: 2003
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40. Experimental analysis of pressure drop and flow redistribution in axial flows in rod bundles
Fuel elements of PWR type nuclear reactors consist of rod bundles, arranged in a square array, and held by spacer grids. The coolant flows, mainly, axially along the rods. Although such elements are laterally open, experiments are performed in closed type test sections, originating the appearance of subchannels with different geometries. In the present work,
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2000
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41. Estudo de processos de obtenção de pó de U3O8 empregado em elementos combustíveis do tipo MTR / Study of processes for the preparation of U3O8 powder for MTR fuel elements
Três métodos de obtenção de pó de U3O8 de alta densidade foram estudados: trituração de pastilhas sInterizadas de U3O8; sinterização de grânulos de U3O8 calcinado; e sinterização de grânulos de diuranato de amônio (DUA). Testes foram conduzidos variando-se a temperatura e o tempo de calcinação do DUA, bem como o tempo de sinterização, resul
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/1989
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42. THERMAL ANALYSIS OF AXIAL FLOWS IN A TYPICAL SUBCHANNEL OF NUCLEAR FUEL ELEMENTS / ANÁLISE TÉRMICA DE ESCOAMENTOS AXIAIS EM SUBCANAL TÍPICO DE ELEMENTOS COMBUSTÍVEIS NUCLEARES
Os elementos combustíveis de reatores nuclear são geralmente constituídos por feixes de barras contendo as pastilhas de combustível montadas em arranjos de geometria triangular ou quadrada, através dos quais o fluido refrigerante escoa axialmente. O projeto térmico desses elementos só pode ser efetuado se informações sobre o processo de retirada de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/10/1979
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43. Minerals Associated with Biofilms Occurring on Exposed Rock in a Granitic Underground Research Laboratory
The concept of disposal of nuclear fuel waste in crystalline rock requires the effects of microbial action to be investigated. The Underground Research Laboratory excavated in a pluton of the Canadian Shield provides a unique opportunity to study these effects. Three biofilms kept moist by seepage through fractures in granitic rock faces of the Underground R
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44. Lipoproteomics: using mass spectrometry-based proteomics to explore the assembly, structure, and function of lipoproteins
Lipoproteins are centrally important in lipid transport, fuel metabolism, and cardiovascular disease. The prototypic lipoprotein has an outer shell of amphipathic lipids and proteins that solubilizes a hydrophobic lipid core. Lipoprotein-associated proteins have classically been viewed as structural elements and factors important in lipid metabolism. Recent
The American Society for Biochemistry and Molecular Biology.
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45. Computational functions in biochemical reaction networks.
In prior work we demonstrated the implementation of logic gates, sequential computers (universal Turing machines), and parallel computers by means of the kinetics of chemical reaction mechanisms. In the present article we develop this subject further by first investigating the computational properties of several enzymatic (single and multiple) reaction mecha