Differential Protection
Mostrando 25-36 de 209 artigos, teses e dissertações.
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25. Resposta sísmica de edifícios com sistemas de isolamento de base
This dissertation work presents a comparative study of parameters that control the effectiveness of the main base isolation systems used in the building protection under a seismic excitation. Also, it is availed the efficient of parameter as: friction coefficient, isolator period, damping coefficient, structural stiffness, and structural period by means of c
Publicado em: 2008
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26. Polymorphism of the promoter region and exon 1 of the CTLA4 gene in endemic pemphigus foliaceus (fogo selvagem)
Endemic pemphigus foliaceus (EPF) is an autoimmune bullous skin disease characterized by acantholysis and antibodies against a desmosomal protein, desmoglein 1. Genetic and environmental factors contribute to development of this multifactorial disease. HLA class II and some cytokine gene polymorphisms are the only genetic markers thus far known to be associa
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-09
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27. A complete model of differential protection of transformers for tests in a digital relay / Um esquema completo de proteção diferencial de transformadores para testes em um relé digital
Este trabalho apresenta um procedimento completo de simulação da proteção digital diferencial aplicada a transformadores de potência, visando o emprego deste à avaliação do comportamento de relés comercialmente disponíveis. Foi escolhido o software ATP (Alternative Transients Program) como ferramenta para a simulação de distintas situações sobr
Publicado em: 2006
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28. Directed dispersal by ants and post-dispersal regenerative phase of the ruderal species Ricinus communis L. (Euphorbiaceae) / Dispersão direcional por formigas e fase regenerativa pos-dispersão da especie ruderal Ricinus communis L. (Euphorbiaceae)
Plant reproduction through seeds has two phases: the regeneration of the individuals of a population and the establishment of the adult plants. The regenerative phase consists of many stages, such as seed release, dispersal, dormancy/quiescency and germination, and seedling establishment, each with differences in duration an? in mechanisms according to the s
Publicado em: 2006
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29. Preparation and characterization of liposomes entrapping allergenic proteins
This work presents results of the preparation and characterization of small unilamellar liposomes for entrapping allergenic proteins extracted from the biomass of Dreschlera (Helminthosporium) monoceras cultivated by solid fermentation. Protein was entrapped by the dehydration-rehydration method, using lyophilization of preformed liposomes in order to preven
Brazilian Journal of Chemical Engineering. Publicado em: 2004-06
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30. Differential expression of notch signaling-related transcripts accompanies Pro-thymocyte proliferation and phenotype transition induced by epidermal growth factor plus insulin in fetal thymus organ cultures
Thymus regression upon stressing stimuli, such as infectious diseases, is followed by organ reconstitution, paralleling its development in ontogeny. A narrow window of thymus development was here studied, encompassing the pro-T lymphoid precursor expansion during specification stages, by the use of epidermal growth factor plus insulin (INS) in murine fetal t
Memórias do Instituto Oswaldo Cruz. Publicado em: 2004-06
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31. CriptoanÃlise Diferencial
Since the creation of the standard of encryption of data DES (Data Encryption Standard) in 1978, iterative ciphers of based private key in nets of Feistel have been constructed, aiming at to increase the security of the information stored and transmitted in unsafe environments of communications. Such ciphers, besides in general presenting one high level of r
Publicado em: 2003
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32. Estudo do processo de encapsulação do bioaroma de gorgonzola em Beta-ciclodextrina e em lipossomas
In this work, it was studied the stabilization of the blue cheese flavour compounds obtained from fermentation of Aspergillus sp, by complexation in P-cyclodextrin and encapsulation in liposomes. The complexation in P-cyclodextrin was carried out by coprecipitation method. Initially, the complexation was studied using concentrated solutions of the main synth
Publicado em: 2003
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33. METROLOGIA: INSTRUMENTO DE CIDADANIA / METROLOGY: CITIZENSHIP INSTRUMENT
Metrology: an instrument for citizenship aims at reviewing the present stage (1) of the Brazilian legislation on metrology and its correlated areas and (2) of the Brazilian education system in metrology, both matters understood as effective instruments that addresses the development of the industrial competitiveness and the consolidation of citizenship in th
Publicado em: 2002
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34. Caracterização da localização subcelular da proteína THI1 de Arabidopsis thaliana. / Characterization of the subcellular localization of arabidopsis thaliana thip.
Arabidopsis thaliana thi1 gene product is probably involved in both thiamine biosynthesis as well as protection of organellar DNA from damage. Studies of thiamine biosynthesis in plants suggest a plastid location for the pathway, which is in agreement with the predicted THI1 N-terminal chloroplastic transit peptide (TP). On the other hand, thiamine is synthe
Publicado em: 2002
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35. Obtenção e caracterização de materiais hibridos organo-inorganicos a base de silsesquioxanos em ponte
In this work, organic-inorganic hybrid materiaIs were prepared through an organic component and an alkoxysilane properly functionalized, by the sol-gel process, at room temperature. Dibutyltin dilaurate was used as catalyst of the silane s hydrolyze/condensation reactions. These materiaIs were obtained from the stechiometric mixture of epoxy resin poly(bisph
Publicado em: 2001
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36. Isolamento de cDNA em algodão homólogo a uma NADP(H) oxidase e induzido durante a seca
O objetivo deste estudo foi identificar e isolar genes diferencialmente expressos em quatro genótipos de algodão (Gossypium hirsutum L.) que apresentam respostas distintas ao déficit hídrico. Os genótipos estudados foram Siokra L-23, Stoneville 506, CS 50 e T-1521. As mudanças fisiológicas, morfológicas e de desenvolvimento que as plantas apresentam
Pesquisa Agropecuária Brasileira. Publicado em: 2000-07