Level Crossing Rates
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Extraction of pilocarpine and epiisopiloturine from jaborandi (pilocarpus microphyllus) using processes involving supercritical solvents / Extração de pilocarpina e episopiloturina de jaborandi utilizando processos envolvendo solventes supercriticos
Pilocarpine is an alkaloid found only in jaborandi leaves (Pilocarpus microphyllus), a native tree of Brazil, and is widely used in the treatment of glaucoma and xerostomia (dry mouth). Epiisopiloturine, another alkaloid also found in jaborandi has a similar biological activity, acting by different mechanisms. This research evaluated the applicability of the
Publicado em: 2008
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2. Distribuições e estatisticas de ordem superior para o canal sem fio / Distributions and higher-order statistics for wireless channels
Neste trabalho, uma nova distribuição de probabilidade amplamente geral, a distribuição α −η − κ − µ, é proposta. Esta distribuição contempla como casos particulares várias outras distribuições conhecidas na literatura, tais como Rayleigh, Rice, Nakagami-m, Hoyt, Weibull, α − µ (Gamma Generalizada) _
Publicado em: 2006
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3. Possible Role of Natural Selection in the Formation of Tandem-Repetitive Noncoding DNA
A simulation model of sequence-dependent amplification, unequal crossing over and mutation is analyzed. This model predicts the spontaneous formation of tandem-repetitive patterns of noncoding DNA from arbitrary sequences for a wide range of parameter values. Natural selection is found to play an essential role in this self-organizing process. Natural select
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4. The Sep1 Mutant of Saccharomyces Cerevisiae Arrests in Pachytene and Is Deficient in Meiotic Recombination
Strand exchange protein 1 (Sep1) from Saccharomyces cerevisiae promotes homologous pairing of DNA in vitro and sep1 mutants display pleiotropic phenotypes in both vegetative and meiotic cells. In this study, we examined in detail the ability of the sep1 mutant to progress through meiosis I prophase and to undergo meiotic recombination. In meiotic return-to-g
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5. Promoter fusions to the Activator transposase gene cause distinct patterns of Dissociation excision in tobacco cotyledons.
To explore the effects of altering the level of Activator (Ac) transposase (TPase) expression, a series of plasmids was constructed in which heterologous promoters were fused to the TPase gene. Promoters for the cauliflower mosaic virus (CaMV) 35S transcript and the octopine synthase (ocs) and nopaline synthase (nos) genes were tested. These fusions, and con
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6. Evolutionary Inferences from DNA Variation at the 6-Phosphogluconate Dehydrogenase Locus in Natural Populations of Drosophila: Selection and Geographic Differentiation
Several allozyme-coding genes in Drosophila melanogaster show patterns suggesting that polymorphisms at these loci are targets of balancing selection. An important question is whether these genes have similar distributions of underlying DNA sequence variation which would indicate similar evolutionary processes occurring in this class of loci. One such locus,