Positive Negative And Zero Sequence
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Real time methods for positive, negative sequence and/or harmonics extraction. / Método de extração em tempo real de seqüência positiva, negativa e/ou harmônicos.
Harmonics and unbalances cause several problems to equipments connected to AC mains. This work proposes a real time method to obtain the positive and negative sequence components and/or harmonics that requires no coordinate transformation neither signal filtering. Numerical simulation and experimental results are shown to validate the proposed method. As exa
Publicado em: 2007
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2. Uma nova abordagem à filtragem de harmônicos através de dispositivos eletromagnéticos
A qualidade da energia elétrica se apresenta como uma área de grande interesse para os consumidores e concessionários de energia. Buscando meios para regulamentar o assunto, reconhece-se, na atualidade, a existência de recomendações, normas e critérios nacionais e internacionais voltados para a orientação dos valores limites ou de referência para o
Publicado em: 2006
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3. rpoB Sequence Analysis of Cultured Tropheryma whippelii
Until recently no isolate of Tropheryma whippelii was available, and therefore genetic studies were limited to those based on PCR amplification of conserved genes. In this study we determined the nucleotide sequence of rpoB (encoding the β-subunit of RNA polymerase) from a cultured strain of T. whippelii using degenerate consensus PCR and genome walking. Th
American Society for Microbiology.
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4. Positive and Negative Regulatory Elements Control Expression of the Yeast Retrotransposon Ty3
We report the results of an analysis of Ty3 transcription and identification of Ty3 regions that mediate pheromone and mating-type regulation to coordinate its expression with the yeast life cycle. A set of strains was constructed which was isogenic except for the number of Ty3 elements, which varied from zero to three. Analysis of Ty3 expression in these st
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5. Single-molecule study of RuvAB-mediated Holliday-junction migration
Branch migration of Holliday junctions is an important step of genetic recombination and DNA repair. In Escherichia coli, this process is driven by the RuvAB complex acting as a molecular motor. Using magnetic tweezers, we studied the RuvAB-directed migration of individual Holliday junctions formed between two ≈6-kb DNA molecules of identical sequence, and
National Academy of Sciences.
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6. Biochemical Identification and Biophysical Characterization of a Channel-Forming Protein from Rhodococcus erythropolis
Organic solvent extracts of whole cells of the gram-positive bacterium Rhodococcus erythropolis contain a channel-forming protein. It was identified by lipid bilayer experiments and purified to homogeneity by preparative sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis (PAGE). The pure protein had a rather low molecular mass of about 8.4 kDa,
American Society for Microbiology.
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7. Characterization of the potassium channel from frog skeletal muscle sarcoplasmic reticulum membrane.
1. The sarcoplasmic reticulum (SR) membrane of skeletal muscle contains potassium channels which are thought to support charge neutralization during calcium release by providing a permeability pathway for counter-ion movement. To describe the behaviour of the SR K+ channel under physiological conditions, single channel activity was recorded from excised patc
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8. Studies of transepithelial Cl- transport in cultured cauda epididymal cells of rats by the short-circuit current method.
1. Monolayer cultures of cauda epididymides from male Sprague-Dawley rats (210-230 g) were studied by the short-circuit current (ISC) technique to characterize the properties of the transepithelial chloride transport. In HCO(3-)-free, HEPES-buffered solution, adrenaline (0.23 microM) added to the basolateral side led to an increase in ISC and transepithelial