Order Lex
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Construção de um índex de informação da prática clínica em Radiologia e Diagnóstico por Imagem baseada em mineração de texto e tesauro
Objective To construct a Portuguese language index of information on the practice of diagnostic radiology in order to improve the standardization of the medical language and terminology. Materials and Methods A total of 61,461 definitive reports were collected from the database of the Radiology Information System at Hospital das Clínicas – Faculdade de M
Radiol Bras. Publicado em: 2013-10
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2. DistribuiÃÃo de pesos de bases de uma matrÃide
Muitas situaÃÃes no dia-dia podem ser descritas por meio de um diagrama que consiste de um conjunto de pontos e linhas que unem certos pares desses pontos. Por exemplo, podemos pensar nos pontos como terminais rodoviÃrios e nas linhas como sendo as estradas. Uma abstraÃÃo matemÃtica para esse tipo de situaÃÃo aparece no conceito de grafos. Em 1992, M
Publicado em: 2008
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3. LIMITES E POSSIBILIDADES DA NOVA LEX MERCATORIA NO DIREITO BRASILEIRO
This dissertation focuses on the new Lex Mercatoria, its possible applications, and the limits of this application in our country, in relation to international Brazilian trade contracts, due to certain aspects of our legal system. This theme was chosen due to the growing importance of international trade in countries economies, owing to factors such as the s
Publicado em: 2007
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4. A responsabilidade do estado na tarefa de garantir o direito de convivência familiar de crianças e adolescentes
In spite of eighteen years have passed since the 1988 Federal Constitution promulgation, still today it is a reality someone turns up with preoccupying situations involving state omissions in the face of the called fundamental human rights, more exactly in what concerns their application to minority social segments. So, the main theme we intend to accomplish
Publicado em: 2007
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5. Estudo in situ da rugosidade superficial de materiais hibridos de ionomero de vidro e resina composta submetidos a procedimentos de acabamento e polimento em função do tempo de permanencia na cavidade bucal
The purpose of this study was to evaluate the surface roughness of two polyacid modified composite resins and a resin modified glass-ionomer submitted to two finishing and polishing treatments, as afunction oftime, using an in situ experimental modelo A resin modified glassionomer Fuji II LC lmproved (GC) and two polyacid modified composite resins Compogla
Publicado em: 2000
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6. Activation of protease-constitutive recA proteins of Escherichia coli by rRNA and tRNA.
The RecA proteins of the unusually strong protease-constitutive mutants recA1202 and recA1211 can use RNA in addition to single-stranded DNA (ssDNA) as a cofactor in the cleavage of the LexA repressor in vitro. In the presence of rRNA or tRNA, the effectiveness of these proteins decreased in the order RecA1202 greater than RecA1211 much greater than RecA+, w
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7. Autodigestion of lexA and phage lambda repressors.
Proteolytic cleavage of lexA repressor is an early step in derepression of the SOS regulatory system of Escherichia coli. In vivo and in vitro data have indicated a role for recA protein in this specific proteolytic reaction. I show here that, under certain conditions, specific in vitro cleavage of highly-purified lexA protein can take place in the absence o
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8. Physical interactions between DinI and RecA nucleoprotein filament for the regulation of SOS mutagenesis
The Escherichia coli dinI gene is one of the LexA-regulated genes, which are induced upon DNA damage. Its overexpression conferred severe UV sensitivity on wild-type cells and resulted in the inhibition of LexA and UmuD processing, reactions that are normally dependent on activated RecA in a complex with single-stranded (ss)DNA. Here, we study the mechanism
Oxford University Press.
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9. Transcriptional repression in Saccharomyces cerevisiae by a SIN3-LexA fusion protein.
The yeast SIN3 gene (also known as SDI1, UME4, RPD1, and GAM2) has been identified as a transcriptional regulator. Previous work has led to the suggestion that SIN3 regulates transcription via interactions with DNA-binding proteins. Although the SIN3 protein is located in the nucleus, it does not bind directly to DNA in vitro. We have expressed a LexA-SIN3 f
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10. Homotypic interactions of chicken GATA-1 can mediate transcriptional activation.
We used a one-hybrid system to replace precisely the finger II chicken GATA-1 DNA-binding domain with the binding domain of bacterial repressor protein LexA. The LexA DNA-binding domain lacks amino acids that function for transcriptional activation, nuclear localization, or protein dimerization. This allowed us to analyze activities of GATA-1 sequences disti
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11. Phase Variation in Helicobacter pylori Lipopolysaccharide due to Changes in the Lengths of Poly(C) Tracts in α3-Fucosyltransferase Genes
The lipopolysaccharide (LPS) of Helicobacter pylori expresses the Lewis x (Lex) and/or Ley antigen. We have shown previously that H. pylori LPS displays phase variation whereby an Lex-positive strain yields variants with different LPS serotypes, for example, Lex plus Ley or nonfucosylated polylactosamine. H. pylori has two α3-fucosyltransferase genes that b
American Society for Microbiology.
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12. Activation of protease-constitutive recA proteins of Escherichia coli by all of the common nucleoside triphosphates.
To understand why the RecA proteins of the protease-constitutive recA1202 and recA1211 mutants show very high protease activities in vivo without the usual need for DNA damage (E. S. Tessman and P. Peterson, J. Bacteriol. 163:677-687, 1985), we examined the activation of the mutant proteins by nucleoside triphosphates (NTPs) in vitro. In vivo, the mutant pro