Center Hole
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Análise da atividade antimicrobiana de probióticos e sua adesividade a bráquetes ortodônticos: estudo in vitro
Resumo Introdução A presença de aparelho ortodôntico fixo dificulta a higienização e potencializa o acúmulo de biofilme bacteriano nas superfícies dentárias. O desenvolvimento de produtos que minimize isso é desejo de pesquisadores em todo o mundo. Objetivo Verificar a ação bacterapêutica de produtos lácteos contendo ou não probióticos sob
Rev. odontol. UNESP. Publicado em: 20/12/2019
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2. Development of a new model of actinic enteritis in rats using a cobalt-60 open source and a protection device as a collimator
Abstract Purpose: To describe a new model of actinic enteritis that does not use radiotherapy machines. Methods: Sixteen Wistar rats were divided into four groups, consisting of four animals each: control (group A), two weeks after irradiation (group B), five weeks after irradiation (group C) and eight weeks after irradiation (group D). Animals were given
Acta Cir. Bras.. Publicado em: 2017-04
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3. Peripheral Deformation and Buckling of Stainless Steel Hemispherical Shells Compressed by a Flat Plate
Abstract An experimental investigation was performed on stainless steel hemispherical shells under axial compression. Eight kinds of shells with radius-to-thickness ratios that range from 57.1 to 125 were designed and manufactured for this study. The shells were compressed to more than 50% of their radii by a solid flat plate. To avoid contact between the ba
Lat. Am. j. solids struct.. Publicado em: 2016-02
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4. Influence of a diagonal pre-drilled hole on hole quality during the reaming process using multiblade tools
The requirements of production engineering for a precision hole are to ensure the required quality as well as minimal production costs. The interactions between machine, tool and the pre-drilled hole result in uncertainties during the final reaming process. For this purpose the reaming process itself and the appearance of process faults were focused in a lar
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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5. Efeito crioprotetor de lactose e glicose em cÃlulas fÃngicas imobilizadas em alginato de sÃdio como mÃtodo de preservaÃÃo de culturas. / Cryoprotectant effect of lactose and glucose yeast cells immobilized in calcium alginate as a method for preservation of cultures
Cryopreservation is the method of choice in many banks of microorganisms because it leads to a situation of metabolic dormancy and consequently cultures are stable for long periods. By reducing the temperature may however be formed of ice crystals which tend to cause cell damage to cell damage in turn can be avoided by vitrification process which takes place
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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6. Propriedades magneto-óticas e de magneto-transporte de um diodo de tunelamento ressonante contendo Si δ - doping no poço quântico
In this work, we have studied the transport and optical properties of GaAs = AlGaAs resonant tunneling diodes with Si delta-doping at the center of the quantum well. We have studied magneto-transport and polarized resolved photoluminescence from GaAs quantum well and contact layers as a function of applied voltage and magnetic _eld parallel to the tunnel cur
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/03/2011
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7. Descontinuidade na seção transversal em laminados compósitos poliméricos: efeitos e propriedades
A crescente demanda na utilização de materiais compósitos torna imprescindível uma melhor compreensão do seu comportamento frente às mais diversas condições de carga e serviço, bem como sob as variadas formas de conexões (fixações) envolvendo mecanismos nos projetos estruturais. Sabe-se que a maioria dos elementos estruturais é projetada com pre
Publicado em: 2010
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8. Estudo experimental da oxidação dos aços inoxidáveis ferríticos AISI 444 e AISI 439 a altas temperaturas em ar
It was carried on a comparative study of the response to oxidation, in high temperatures and dry air atmosphere, of the stainless steel AISI 444 and AISI 439, with the temperature range between 850C and 1.050C. Such steels differ in their chemical composition basically by containing molybdenum in the AISI 444 steel. It were used samples supplied by ArcelorMi
Publicado em: 2008
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9. Thermoluminescence, electron paramagnetic resonance and color centers properties of diopside / Propriedades de termoluminescência, de ressonância paramagnética eletrônica e de centros de cor de diopsídio
Diopside of chemical formula, CaMgSi2O6, a natural silicate mineral has been investigated concerning its Thermoluminescence (TL), Electron Paramagnetic Resonance (EPR) and Reflectance properties. Synthetic, pure or doped diopside, produced in the laboratory, has been investigated. Samples annealed at 600 `GRAUS´ C for one hour, to eliminate previously induc
Publicado em: 2007
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10. Correlated electron-hole transitions in bulk GaAs and GaAs-(Ga,Al)As quantum wells: effects of applied electric and in-plane magnetic fields
The effects of crossed electric and magnetic fields on the electronic and exciton properties in semiconductor heterostructures have been investigated within the effective-mass and parabolic band approximations for both bulk GaAs and GaAs-Ga1-xAl xAs quantum wells. The combined effects on the heterostructure properties of the applied crossed electric/magnetic
Brazilian Journal of Physics. Publicado em: 2006-09
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11. Propriedades de termoluminescência, ressonância paramagnética eletrônica e absorção óptica da rodonita natural e sintética / Thermoluminescence, electron paramagnetic resonance and optical absorption properties of natural and synthetic Rodonita
The optical absorption, electron paramagnetic resonance and thermoluminescence properties of natural silicate mineral, rhodonite with chemical formula (Mn,Ca,Fe,Mg)SiO3 as well as synthetic samples pure or doped have been investigated. Synthetic samples were obtained heating appropriated mixture of oxides components of rhodonite to above melting temperature
Publicado em: 2005
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12. Análises espectroscópicas em vidros aluminoboratos de bário dopados com íons de Mn / Spectroscopical analyses in barium aluminoborate glasses doped with Mn
As amostras de vidro aluminoborato de bário (BABAL), obtido a partir da estrutura 20 Al2O3. 50 B2O3. 30 BaO mol% dopadas com manganês foram preparadas e caracterizadas pelas técnicas de absorção óptica (AO), ressonância paramagnética eletrônica (RPE) e termoluminescência (TL). O presente estudo está centrado nos íons manganês e nas suas interaç
Publicado em: 2005