Hybrid Drive
Mostrando 13-24 de 36 artigos, teses e dissertações.
-
13. Brecha espectral na geração de corrente por onda hibrida inferior
Current drive by lower hybrid wave LH, is the most promising technique to obtain continuos current for the controlled thermonuclear fusion. The existence of "Spectral gap" forbid satisfactory match between theoretical results and experimental measurements of the generated current. The theory has always predicted smaller values. In this Thesis we show a possi
Publicado em: 1997
-
14. Estrategias de detecção e diagnostico de falhas em sistemas dinamicos
Analytical redundancy for fault detection and diagnosis of dynamic systems, FDD, has been approached by several methodologies, state estimation, parameter estimation, expert systems, and pattern classification and recognition being typical examples. In particular, pattern classification and recognition methods adopt probabilistic, heuristic, neural, and fuzz
Publicado em: 1997
-
15. Interação da onda híbrida inferior com os íons rápidos no Tokamak JET / Interaction of Lower Hybrid Waves with Fast Ions in JET
As tentativas de se conseguir um funcionamento contínuo para o tokamak e as perspectivas de estabilização de oscilações MHD através do controle do perfil de corrente, motivaram pesquisas que levassem a uma forma de geração de corrente não indutiva. Uma das possíveis alternativas para atingir esta meta é a injeção de ondas de alta freqüência co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/1994
-
16. Causes of Sex Ratio Bias May Account for Unisexual Sterility in Hybrids: A New Explanation of Haldane's Rule and Related Phenomena
Unisexual hybrid disruption can be accounted for by interactions between sex ratio distorters which have diverged in the species of the hybrid cross. One class of unisexual hybrid disruption is described by Haldane's rule, namely that the sex which is absent, inviable or sterile is the heterogametic sex. This effect is mainly due to incompatibility between X
-
17. Meiotic Drive and Unisexual Hybrid Sterility: A Comment
-
18. An Empirical Test of the Meiotic Drive Models of Hybrid Sterility: Sex-Ratio Data from Hybrids between Drosophila Simulans and Drosophila Sechellia
Recently, there has been much discussion regarding the hypothesis that divergence of meiotic drive systems in isolated populations can generate the patterns of reproductive isolation observed in animal hybridizations. One prediction from this hypothesis is that the sex ratio of hybrids with heterospecific sex chromosomes should greatly deviate from the Mende
-
19. RNase L dimerization in a mammalian two-hybrid system in response to 2',5'-oligoadenylates.
RNase L, a key enzyme in the anti-viral activity of interferons, requires activation by 2',5'-linked oligoadenylates (2-5A) to cleave viral and cellular single-stranded RNA. Here we demonstrate that 2-5A causes formation of stable dimers of RNase L in intact human cells as measured with a mammalian two-hybrid system. Hybrid proteins consisting of the GAL4 DN
-
20. Translation initiation controls the relative rates of expression of the bacteriophage lambda late genes.
The late operon of bacteriophage lambda contains the genes encoding the morphogenetic proteins of the phage. These genes are transcribed equally from the single late promoter. Although the functional half-lives of the mRNA for the various genes of this operon vary less than 2-fold, their relative rates of expression have been shown to vary by nearly 1000-fol
-
21. Evidence for Extensive Genetic Differentiation between the Sex-Ratio and the Standard Arrangement of DROSOPHILA PSEUDOOBSCURA and D. PERSIMILIS and Identification of Hybrid Sterility Factors
This study deals with sex-ratio genes tightly linked within the Sex-Ratio inversion. By taking advantage of the fact that the Sex-Ratio chromosome of Drosophila persimilis [SR(B)] is homosequential to the Standard chromosome of D. pseudoobscura [ST(A)], we carried out two reciprocal introgression experiments. Individual segments of SR(B) or ST(A) were introg
-
22. Yeast and mammals utilize similar cytosolic components to drive protein transport through the Golgi complex.
Vesicular transport between successive compartments of the mammalian Golgi apparatus has recently been reconstituted in a cell-free system. In addition to ATP, transport requires both membrane-bound and cytosolic proteins. Here we report that the cytosol fraction from yeast will efficiently substitute for mammalian cytosol. Mammalian cytosol contains several
-
23. Branched-Chain Amino Acid Transport in Cytoplasmic Membranes of Leuconostoc mesenteroides subsp. dextranicum CNRZ 1273
Membrane vesicles of Leuconostoc mesenteroides subsp. dextranicum fused with proteoliposomes prepared from Escherichia coli phospholipids containing beef heart cytochrome c oxidase were used to study the transport of branched-chain amino acids in a strain isolated from a raw milk cheese. At a medium pH of 6.0, oxidation of an electron donor system comprising
-
24. Nonsense-mediated decay of glutathione peroxidase 1 mRNA in the cytoplasm depends on intron position
mRNA for glutathione peroxidase 1 (GPx1) is subject to cytoplasmic nonsense-mediated decay (NMD) when the UGA selenocysteine (Sec) codon is recognized as nonsense. Here, we demonstrate by moving the sole intron of the GPx1 gene that either the Sec codon or a TAA codon in its place elicits NMD when located ≥59 bp but not ≤43 bp upstream of the intron. T
Oxford University Press.