Discontinuous Mechanisms
Mostrando 1-12 de 29 artigos, teses e dissertações.
-
1. Teorema do envelope generalizado para espaços de tipos multidimensionais
O principal objetivo desta dissertação é obter um Teorema do Envelope que permita mecanismos não diferenciáveis, preferências arbitrárias e que possa ser aplicado em modelos com múltiplos agentes. Nós alcançamos isto ao expandir a análise de Milgrom e Segal (2002), generalizando seus resultados para espaços de tipos multidimensionais. Dessa forma
Publicado em: 2010
-
2. Magneto-tunelamento ressonante em super-redes de GaAs/AsGaAs
In this thesis we present three works in weakly coupled semiconductor superlattices of GaAs/AlGaAs. In the first work we present an investigation of the electric field domain configuration in the sequential tunneling regime in weakly coupled superlattices in the presence of a magnetic field applied parallel to the quantum well layers. We show that, for an ap
Publicado em: 2008
-
3. Mapeamento da zona costeria protegida por arenitos de praia (Beachrocks) em Nísia Floresta - RN
The goal of this work comprises the detailed mapping of the coastal zone of the south coast of the State of Rio Grande do Norte. The emphasis of the study is the units of beachrocks and the features of the physical environment associated. The mapping of the beachrocks and of the adjacent coastal features is justified, among other aspects, by the fact that th
Publicado em: 2005
-
4. Influencia da suplementação de Aspartato e Asparagina sobre a associação entre os limiares metabolicos e ventilatorios e sobre a taxa de oxidação de nutrientes durante o exercicio
The anaerobic threshold (A T), defined as the levei of work or the O2 consumption (V02) just below that at which metabolic acidosis and associated changes in gas exchange occur, is composed of a supposed cause-effect association of 2 individual thresholds - lactate or metabolic (MT) and ventilatory (VT). However the proposed mechanisms to explain musclelbloo
Publicado em: 2004
-
5. Analysis of the intercellular fluid proteome of Xylella fastidiosa - infected citrus leaves. / Análise do proteoma do fluído intercelular de folhas de laranjeiras infectadas com Xylella fastidiosa.
In order to understand the mechanisms regulating the Xylella fastidiosacitrus (Citrus sinensis var. Pêra) interaction, proteins with differential accumulation in the apoplast of Xf-infected citrus leaves with or without disease symptoms as compared to non-infected leaves, were identified and characterized using 2D-PAGE and mass spectrometry (MALDI-ToF). The
Publicado em: 2002
-
6. Lattice model of replicators: aplication on prebiotic models and herpes ulcer / Dinâmica de replicação na rede: aplicações em modelos de evolução pré-biótica e de formação de úlceras
Two fundamental questions in the study of prebiotic evolution (origin of life) are concerned to the requisites for the persistence of small colonies of self-replicating molecules (replicators) and to the possibility that complex organisms evolve from simpler organisms as a result of mutations. These issues have been studied mainly in the chemical kinetics fo
Publicado em: 2001
-
7. Polyoma virus DNA replication is semi-discontinuous.
In marked contrast to simian virus 40 (SV40), polyoma virus (PyV) has been reported to replicate discontinuously on both arms of replication forks. In an effort to clarify the relationship between the mechanisms of DNA replication in these closely related viruses, the distribution of RNA-primed DNA chains at replication forks was examined concurrently in PyV
-
8. Evaluation of the role of heterogeneous nuclear ribonucleoprotein A1 as a host factor in murine coronavirus discontinuous transcription and genome replication
Viruses with RNA genomes often capture and redirect host cell components to assist in mechanisms particular to RNA-dependent RNA synthesis. The nidoviruses are an order of positive-stranded RNA viruses, comprising coronaviruses and arteriviruses, that employ a unique strategy of discontinuous transcription, producing a series of subgenomic mRNAs linking
The National Academy of Sciences.
-
9. Mechanism of nuclear DNA replication in radicles of germinating cotton
The mechanism of nuclear DNA replication in radicles of germinating cotton (Gossypium barbadense) was investigated. Pulse-labeling with [3H]thymidine indicates that replication intermediates are of small molecular weight (4-10S) and behave as if single-stranded. Prolonged labeling indicates that intermediates are of discrete size, suggesting a mechanism of d
-
10. Discontinuous plus-strand DNA synthesis in human immunodeficiency virus type 1-infected cells and in a partially reconstituted cell-free system.
Human immunodeficiency virus type 1 (HIV-1) replication requires conversion of viral RNA to double-stranded DNA. To better understand the molecular mechanisms of this process, we examined viral DNA synthesis in a simple cell-free system that uses the activities of HIV-1 reverse transcriptase to convert regions of single-stranded HIV-1 RNA to double-stranded
-
11. Reevaluation of Amino Acid Variability of the Human Immunodeficiency Virus Type 1 gp120 Envelope Glycoprotein and Prediction of New Discontinuous Epitopes
To elucidate the evolutionary mechanisms of the human immunodeficiency virus type 1 gp120 envelope glycoprotein at the single-site level, the degree of amino acid variation and the numbers of synonymous and nonsynonymous substitutions were examined in 186 nucleotide sequences for gp120 (subtype B). Analyses of amino acid variabilities showed that the level o
American Society for Microbiology.
-
12. Importance of the Positive-Strand RNA Secondary Structure of a Murine Coronavirus Defective Interfering RNA Internal Replication Signal in Positive-Strand RNA Synthesis
The RNA elements that are required for replication of defective interfering (DI) RNA of the JHM strain of mouse hepatitis virus (MHV) consist of three discontinuous genomic regions: about 0.46 to 0.47 kb from both terminal sequences and an internal 58-nucleotide (nt)-long sequence (58-nt region) present at about 0.9 kb from the 5′ end of the DI genome. The
American Society for Microbiology.