Inductors
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Potencialidades e limites para o desenvolvimento econômico e inovativo local: uma análise comparativa em parques tecnológicos da região nordeste
Innovation and technological change processes define the trajectories of economic development of countries, regions and cities. Technological advance has been the main driving force behind the developing regions, accounting for much of the increase in productivity, income, job creation and international competitiveness. In that sense, the Habitat s innovatio
Publicado em: 2010
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14. DETERMINATION OF POLYCHLORINATED BIPHENYLS IN POWDERED MILK AND ESTIMATED DAILY INGESTION IN PRE-SCHOLARS / DETERMINAÇÃO DE BIFENILOS POLICLORADOS EM LEITE EM PÓ E INGESTÃO DIÁRIA ESTIMADA POR PRÉ-ESCOLARES
The polychlorinated biphenyls are synthetic organoclorated substances that can produce noxious effects to health. There are not any natural sources of PCBs known in the environment. They can be liquid or solid, colorless or clear yellow. Some of them are volatile and may remain as steams in the air. They were widely used in the industry as oils for transform
Publicado em: 2010
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15. ANÁLISE, MODELAGEM E VALIDAÇÃO EXPERIMENTAL DE UMA METODOLOGIA PARA O PROJETO DO INDUTOR EM CONVERSORES BOOST PFC / ANALYSIS, MODELING AND EXPERIMENTAL VALIDATION OF A DESIGN METHODOLOGY FOR THE INDUCTOR IN PFC BOOST CONVERTERS
This work presents the development of a methodology for design of inductor in singlephase PFC boost converters operating in CCM mode in agreement with international standards IEC 61000-3-2 and CISPR 22. Such converters are used in front-end modules of information technology equipment. This methodology is based on the investigation of the relationship among m
Publicado em: 2009
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16. Avaliação de técnicas alternativas para o manejo da antracnose da banana em pós-colheita
The banana is the second fruit more consumed in the world, being the fruit fresh holder of larger world market. Brazil, answers as second producing adult, using the varieties Silver and Pacovan in approximately 60% of area harvestd. However, several factors can cause losses in the production. In the powder-crop to the anthracnose, caused by Colletotrichum mu
Publicado em: 2009
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17. Produção e caracterização da atividade de tirosinase no extrato bruto de Pycnoporus sanguineus CCT-4518 / Production and characterization of tyrosinase activity in Pycnoporus sanguineus CCT-4518 crude extract
Tyrosinase (E.C.1.14.18.1) is an enzyme of industrial interest that catalyses the ohydroxylation of monophenols (monophenolase activity) and the oxidation of o-diphenols to reactive o-quinones (diphenolase activity), both reactions using molecular oxygen. Pycnoporus sanguineus (L. ex Fries) Murril, is a white rot fungi capable of producing tyrosinase and wid
Publicado em: 2009
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18. Production and characterization of tyrosinase activity in Pycnoporus sanguineus CCT-4518 crude extract / Produção e caracterização da atividade de tirosinase no extrato bruto de Pycnoporus sanguineus CCT-4518
Tyrosinase (E.C.1.14.18.1) is an enzyme of industrial interest that catalyses the ohydroxylation of monophenols (monophenolase activity) and the oxidation of o-diphenols to reactive o-quinones (diphenolase activity), both reactions using molecular oxygen. Pycnoporus sanguineus (L. ex Fries) Murril, is a white rot fungi capable of producing tyrosinase and wid
Publicado em: 2009
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19. Flavins promote changes in the extracellular matrix, signal transduction, antioxidant enzymes and metalloproteinases during osteoblast differentiation / Flavinas promovem mudanças na matriz extracelular, vias de transdução de sinal, enzimas antioxidantes e metaloproteinases durante a diferenciação de osteoblastos
Riboflavin (Rb-Vitamin B2) is the precursor of essential flavocoenzymes, flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). These coenzymes participate in numerous enzymatic processes dependent on electron transfer reactions that occur in energyproducing, biosynthetic, and detoxifying and electron-scavenging pathways. Increase dietary ribofla
Publicado em: 2009
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20. Co2Z hexaferrite obtained by the citrate precursor method in an inert atmosphere
Nanoparticles of Co2Z hexaferrite were synthesized by the citrate sol-gel process under an inert atmosphere, then thermally analyzed by Thermogravimetric and Differential Thermal Analysis and characterized by X-ray Diffraction, Scanning Electron Microscopy, Atomic Force Microscopy, X-ray Fluorescence and Vibration Sample Magnetometry. Z-type barium hexaferri
Matéria (Rio de Janeiro). Publicado em: 2008-06
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21. Integrated passive inductors for radio frequency applications / Indutores integrados passivos para aplicações em radio frequencia
This work aims the design and implementation of integrated passive inductors based on CMOS and BiCMOS processes. The inductors are essential devices in radio frequency applications and are used in many RF circuits such as amplifiers and oscillators. The inductors performance is mainly limited by metal and substrate losses. Although various methods of improve
Publicado em: 2008
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22. Bradykinin or acetylcholine as vasodilators to test endothelial venous function in healthy subjects
INTRODUCTION: The evaluation of endothelial function has been performed in the arterial bed, but recently evaluation within the venous system has also been explored. Endothelial function studies employ different drugs that act as endothelium-dependent vasodilatory response inductors. OBJECTIVES: The aim of this study is to compare the endothelium-dependent v
Clinics. Publicado em: 2008
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23. Estimativas de perdas em estruturas saturadas
Esta dissertaÃÃo propÃe um modelo para a estimaÃÃo de perdas em estruturas magnÃticas que operam sob regime de intensa induÃÃo magnÃtica, tais como se verifica no reator com saturaÃÃo natural. A metodologia utilizada para elaboraÃÃo desse modelo fundamenta-se na clÃssica separaÃÃo das perdas em parcelas devidas a histerese e as correntes de F
Publicado em: 2008
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24. Evolução da cadeia de suprimentos na indústria de produtos e soluções para redes de computadores: estudo de múltiplos casos / Supply-chain evolution in the network industr y: multiple cases study
This thesis studies the process and mechanisms of Supply-Chain changes in fast clockspeed industries, focusing the cyclical movements toward vertical integration and horizontal disintegration, according to Charles Fines Double Helix model. Other elements, derivate or inductors from these changes have also been studied such as outsourcing activities, growing
Publicado em: 2008