Bernstein Type Results
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Sobre rigidez de hipersuperfÃcies completas / On rigidity of complete hypersurfaces
The purpose of this thesis is to obtain characterization theorems of complete spacelike hypersurfaces isometrically immersed in a semi-Riemannian ambient space under some restrictions on the Gauss mapping or about the r-mean curvatures of these objects. We start our work by providing necessary conditions to ensure the umbilicity of immersed hypersurfaces in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2011
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2. Alguns resultados tipo-Bernstein em variedades semi-riemannianas / Some Bernstein-type results in semi-riemannian manifolds
Nesta tese, estudamos hipersuperfÃcies de tipo-espaÃo completas imersas em variedades semi-Riemannianas, satisfazendo alguma condiÃÃo sobre suas curvaturas de ordem superior, a fim de obtermos resultados tipo-Bernstein. As ferramentas analÃticas que utilizamos sÃo algumas versÃes do princÃpio do mÃximo. No caso em que o ambiente à um espaÃo-tempo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/05/2011
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3. Sobre a geometria de imersÃes isomÃtricas em variedades de Lorentz conformemente estacionÃrias / On the geometry of varieties of isometric immersions in Lorents stationary conformally
In this thesis we study several aspects of the geometry of conformally stationary Lorentz manifolds and, more particularly, of generalized Robertson-Walker spaces, under the presence of a closed conformal vector field. We initiate by focusing our study on the r-stability and on the strong r-stability of closed spacelike hypersurfaces of conformally stationar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/12/2010
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4. A formação do enfermeiro - anos 2000: contradições e desafios à prática pedagógica.
This study deals with the theme currculum, pedagogical Practice and the nurse?s formation which at present has taken relevant space within academical debate. Concerning these points, discourses take turns in demonstrating several concerns and many are the results from different analyses, for in the last decades the curriculum questions on the formation of th
Publicado em: 2003
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5. INTELLIGENT ASSISTANCE FOR KDD-PROCESS ORIENTATION / ASSISTÊNCIA INTELIGENTE À ORIENTAÇÃO DO PROCESSO DE DESCOBERTA DE CONHECIMENTO EM BASES DE DADOS
Generally speaking, such aspects involve difficulties in perceiving innumerable facts whose origin and levels of detail are highly diverse and diffused, in adequately interpreting these facts, in dynamically conjugating such interpretations, and in deciding which actions must be performed in order to obtain good results. How are the objectives of the process
Publicado em: 2003
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6. Method for Typing Antisera to Herpesvirus hominis by Indirect Hemagglutination Inhibition
A test for typing antisera to Herpesvirus hominis that uses the method of indirect hemagglutination inhibition is described. The test, which is based upon the differential absorption of herpes antisera by preparations of type 1 and type 2 antigens, is rapidly and easily performed. The results permit some conclusions to be drawn regarding the antigenic relati
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7. Sec59 encodes a membrane protein required for core glycosylation in Saccharomyces cerevisiae.
When incubated at a restrictive temperature, Saccharomyces cerevisiae sec59 mutant cells accumulate inactive and incompletely glycosylated forms of secretory proteins. Three different secretory polypeptides (invertase, pro-alpha-factor, and pro-carboxypeptidase Y) accumulated within a membrane-bounded organelle, presumably the endoplasmic reticulum, and resi
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8. Human immunodeficiency virus type 1 envelope glycoprotein is modified by O-linked oligosaccharides.
The human immunodeficiency virus type 1 (HIV-1) envelope glycoprotein has been shown to be extensively modified by N-linked glycosylation; however, the presence of O-linked carbohydrates on the glycoprotein has not been firmly established. We have found that enzymatic deglycosylation of the HIV-1 envelope glycoprotein with neuraminidase and O-glycosidase res
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9. Poliovirus mutant that does not selectively inhibit host cell protein synthesis.
A poliovirus type I (Mahoney strain) mutant was obtained by inserting three base pairs into an infectious cDNA clone. The extra amino acid encoded by the insertion was in the amino-terminal (protein 8) portion of the P2 segment of the polyprotein. The mutant virus makes small plaques on HeLa and monkey kidney (CV-1) cells at all temperatures. It lost the abi
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10. Transcellular activation of the human immunodeficiency virus type 1 long terminal repeat in cocultured lymphocytes.
One of the unexplained aspects of the progression of AIDS is that immunological abnormalities are detectable before CD4+ T-helper cell depletion occurs (A.R. Gruters, F.G. Terpstra, R. De Jong, C.J.M. Van Noesel, R.A.W. Van Lier, and F. Miedema, Eur. J. Immunol. 20:1039-1044, 1990; F. Miedema, A.J. Chantal-Petit, F.G. Terpstra, J.K.M.E. Schattenkerk, F. de W
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11. Physiological Basis for Conservation of the Signal Recognition Particle Targeting Pathway in Escherichia coli
The Escherichia coli signal recognition particle (SRP) is a ribonucleoprotein complex that targets nascent inner membrane proteins (IMPs) to transport sites in the inner membrane (IM). Since SRP depletion only partially inhibits IMP insertion under some growth conditions, however, it is not clear why the particle is absolutely essential for viability. Insigh
American Society for Microbiology.
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12. Transposon Insertions Causing Constitutive Sex-Lethal Activity in Drosophila Melanogaster Affect Sxl Sex-Specific Transcript Splicing
Sex-lethal (Sxl) gene products induce female development in Drosophila melanogaster and suppress the transcriptional hyperactivation of X-linked genes responsible for male X-chromosome dosage compensation. Control of Sxl functioning by the dose of X-chromosomes normally ensures that the female-specific functions of this developmental switch gene are only exp