Defect Centers
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. High-Risk Screening and Diagnosis of Inborn Errors of Metabolism: A Practical Guide for Laboratories
Abstract Inborn errors of metabolism (IEM) are a large and heterogeneous group of genetic diseases. In most of these conditions, the presence of variants in specific genes leads to enzyme deficiencies that affect a particular metabolic step. The number of laboratories dedicated to the study of IEM is very limited worldwide, and its multiplication is urgently
J. inborn errors metab. screen.. Publicado em: 28/02/2019
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2. Evolution of critically ill patients with gastroschisis from three tertiary centers
OBJECTIVES AND INTRODUCTION: Gastroschisis is a congenital abdominal wall defect with increasing occurrence worldwide over the past 20-30 years. Our aim was to analyze the morbidity of newborns after gastroschisis closure, with emphasis on metabolic and hydroelectrolyte disturbances in patients at three tertiary university centers. METHODS: From January 2003
Clinics. Publicado em: 2011
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3. Estudos das propriedades estruturais e ópticas de vidros teluritos / Studies of the structural and optical properties of the tellurite glasses
Vidros teluritos são considerados fortes candidatos para aplicações em lasers e óptica não linear devido a importantes características, como o elevado índice de refração, baixa energia de fônons, baixa temperatura de transição vítrea e sua fácil preparação. Neste trabalho foram produzidas amostras dos sistemas vítreos TeO2- ZnO-Na2O, TeO2-Nb
Publicado em: 2011
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4. Comparasion of two minimally invasive methods on the longevity of glass ionomer cement restorations: short-term results of a pilot study
The purpose of this study was to evaluate the clinical performance of glass ionomer cement (GIC) restorations comparing two minimally invasive methods in permanent teeth after 12 months. Fifty pregnant women (second trimester of pregnancy), mean age 22 ± 5.30 years, were treated by two previously trained operators. The treatment approaches tested were: chem
Journal of Applied Oral Science. Publicado em: 2008-04
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5. Centros de cor, centros paramagnéticos e centros de luminescência dependentes de defeitos pontuais em zirconita / Color center, paramagnetic center and luminescence center due the defect point in zircon
In the present work the investigation of some properties of Thermoluminescence (TL), Electronic Paramagnetic Resonance (EPR) and Optical Absorption (OA) of two samples of zircon (of brown color) from Minas Gerais, but the unknown exact origin, were carried out. The glow curves of thermoluminescence emission have shown the presence of 4 TL peaks at 140, 215,
Publicado em: 2005
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6. Defect centers in a-SiNx: electronic and structural properties
By combining ab initio methods and interatomic potentials, we investigated the electronic and the structural properties of amorphous silicon nitride. Our results show the trends on the electronic band structure of SiNx (0.5 < x < 1.8) as the nitrogen content changes, and are in good agreement with the experimental data.Hydrogenation of the systems was found
Brazilian Journal of Physics. Publicado em: 2002-06
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7. Zinc oxide films doped with aluminium or europium: preparation and characterization. / Filmes de óxido de zinco dopado com alumínio ou európio: preparação e caracterização.
The interest in the preparation of thin films by the sol-gel process has increased in last years due to the high quality of the films, low cost of the organic precursors and the great technological importance. Depending on the preparation conditions and dopant species, it is possible to obtain films with piezelectric, luminescent, isolating, conductive and s
Publicado em: 2001
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8. Caracterização de impurezas estruturais e de centros de defeitos relacionados ao A1 e OH quartzo natural
Characterization of lattice impurities and study of AI and H defects centers have conducted on natural quartz through a variety of experiments. For this purpose, about thirty samples of natural quartz were assembled from fourteen mines with known localities in Brazil. "The concentrations of Al, Fe , Li, Na e K have evaluated by atomic absorption spectroscopy
Publicado em: 1992
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9. Hypogammaglobulinemia and Thymic Hypoplasia in Horses: a Primary Combined Immunodeficiency Disorder
A severe combined immunodeficiency disorder was demonstrated in two Arabian foals which were full siblings. The defect in the B-lymphocyte system was shown by hypogammaglobulinemia, lymphopenia, and absence of germinal centers. The almost total absence of thymic tissue in one foal and the lack of thymic dependent lymphocytes in the spleens of both foals demo
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10. Unique Temperature-Sensitive Defect in Vaccinia Virus Morphogenesis Maps to a Single Nucleotide Substitution in the A30L Gene
Marker rescue experiments demonstrated that the genetic lesion of a previously isolated vaccinia virus temperature-sensitive mutant which forms multilayered envelope structures with lucent interiors and foci of viroplasm with dense centers mapped to the A30L open reading frame. A single base change, resulting in a nonconservative Ser-to-Phe substitution at r
American Society for Microbiology.
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11. Replication Protein A (RPA) Phosphorylation Prevents RPA Association with Replication Centers
Mammalian replication protein A (RPA) undergoes DNA damage-dependent phosphorylation at numerous sites on the N terminus of the RPA2 subunit. To understand the functional significance of RPA phosphorylation, we expressed RPA2 variants in which the phosphorylation sites were converted to aspartate (RPA2D) or alanine (RPA2A). Although RPA2D was incorporated in
American Society for Microbiology.
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12. Introduction of asymmetry in the naturally symmetric restriction endonuclease EcoRV to investigate intersubunit communication in the homodimeric protein.
Type II restriction endonucleases are dimers of two identical subunits that together form one binding site for the double-stranded DNA substrate. Cleavage within the palindromic recognition site occurs in the two strands of the duplex in a concerted manner, due to the action of two catalytic centers, one per subunit. To investigate how the two identical subu