Manufactures
Mostrando 1-12 de 72 artigos, teses e dissertações.
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1. PEDRO DE ALCANTARA LISBOA, QUÍMICO BRASILEIRO DO SÉCULO XIX
The subject of the present article is a Brazilian chemist who lived and worked in the nineteenth century and who is hardly known today. He was the first person in Brazil, still in the first half of the nineteenth century, to write chemical equations in the description of actual reactions, and also the first to use equations in order to perform stoichiometric
Química Nova. Publicado em: 2022
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2. Radiopacidade de dentes artificiais para treinamento pré-clínico de endodontia
Resumo Introdução Dentes artificiais têm sido utilizados para a prática odontológica e, segundo seus fabricantes, apresentam muita similaridade aos dentes humanos para treinamento. Objetivo Avaliar a radiopacidade de dentes endodônticos artificiais para uso em atividades de ensino e saber a percepção de docentes quanto à análise radiográfica. M
Rev. odontol. UNESP. Publicado em: 07/11/2019
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3. As elasticidades setoriais das exportações brasileiras:uma análise empírica para o período 1999-2013
Resumo O objetivo deste estudo é analisar o desempenho das exportações brasileiras de produtos básicos e manufaturados para os blocos de países da Ásia, do NAFTA (Tratado Norte-Americano de Livre Comércio),da União Europeia e do Mercosul (Mercado Comum do Sul) entre os anos de 1999 e 2013. A partir do Modelo de Substitutos Imperfeitos de Goldstein e
Nova econ.. Publicado em: 09/05/2019
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4. Matriz de Competitividade e o papel dos mercados emergentes nas exportações argentinas e brasileiras
Resumo O objetivo deste trabalho é analisar a evolução da estrutura de exportações da Argentina e do Brasil entre 1985 e 2010 a partir da matriz de competitividade desenvolvida originalmente por Fajnzylber e Mandeng. Especificamente, pretende-se analisar a relação existente entre o formato da matriz de competitividade e a evolução dos mercados de de
Econ. soc.. Publicado em: 29/04/2019
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5. Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength
Abstract If steel manufactures usually comply with the minimum code specifications, the nominal yield strength of rebar can however be significantly exceeded in many countries, depending on the steel manufacturing processes. Such an increase in yield strength can have negative effects on the flexural behavior of beams designed as tension controlled, and redu
Lat. Am. j. solids struct.. Publicado em: 2016-05
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6. Citotoxicity of nonlatex elastomeric ligatures of orthodontic use
The aim of this study is to evaluate cytotoxicity between polyurethane and non-latex orthodontic elastomeric ligatures. Seven elastomeric ligatures of black-coloured from different manufactures (3 non-latex, 3 polyurethane and 1 latex) were divided into 7 groups of 10 elastics each: Group UK (nonlatex, 3M Unitek), Group TP (nonlatex, TP Orthodontics), Group
Matéria (Rio J.). Publicado em: 2015-03
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7. Influence of different acid etchings on the superficial characteristics of Ti sandblasted with Al2O3
Some implant manufactures use Al2O3 instead TiO2 powder to sandblast the machined dental implant, because Al2O3 powder is commercially more easily available and is cheaper than TiO2 powder. However, Al2O3 powder usually leaves aluminum oxide contamination on the surface, which is potentially toxic. In this work, we subjected Ti discs previously sandblasted w
Mat. Res.. Publicado em: 10/05/2013
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8. Análise da eficácia do instrumento RECIPROC #25 em atingir o forame apical sem glide path / Analysis of the effectiveness of the instrument RECIPROC #25 to achieve the foramen without glide path
The aim of the present studywas to evaluate the effectiveness of the Reciproc #25 instrument in reaching the apical foramen of mandibular molars root canals without any manual glide path. For this, a general sample of 300 mandibular molars was radiographed and graded accordantly the degree of curvature (Schneiders criteria) classes I and II. After applying t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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9. In vitro study of cytotoxicity of orthodontic elastomeric ligatures
This study investigated the cytotoxicity of crystal-coloured orthodontic elastomeric ligatures of polyurethane. Six ligatures from distinct manufactures were divided into 6 groups of 10 elastics each: Groups P1, P2, P3, P4, P5 and P6 (Polyurethane). The cytotoxicity essay was performed using L-929 line cells, which were submitted to the cell viability test w
Materials Research. Publicado em: 26/06/2012
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10. Evaluation of the cytotoxicity of polyurethane and non-latex orthodontic chain elastics
Allergy caused by latex proteins has been well documented. Thus, the study of non-latex materials, is necessary. The aim of this study is to evaluate the cytotoxicity of silver-coloured orthodontic chain elastics, of polyurethane and latex-free. Nine chain elastics from different manufactures (3 latex-free and 6 polyurethane) were divided into 9 groups of 10
Matéria (Rio J.). Publicado em: 2012
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11. Aplicação de métodos não destrutivos para qualificação de combustíveis tipo dispersão de U308-Al e U3Si2-Al no reator IEA-R1 / Application of non-destructive methods for qualification of the U3O8-Al and U3Si2-Al dispersion fuels in the IEA-R1 Reactor
IPEN/CNEN-SP manufactures fuels to be used in its nuclear research reactor the IEA-R1. To qualify those fuels, it is necessary to check if they have a good performance under irradiation. As Brazil doesnt have nuclear research reactors with high neutron fluxes, or suitable hot cells for carrying out post-irradiation examination of nuclear fuels, IPEN/CNEN-SP
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/11/2011
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12. Efeito do processamento e da inclusão de fibras nas propriedades mecânicas e ópticas de uma porcelana odontológica / The effect of processing methods and fibers incorporation on the optical and mechanical properties of a dental porcelain
The objective was to evaluate the processing methods (conventional sintering and heat pressing) and fibers incorporation on the microstructure, mechanical properties (flexural strength f, and Weibull parameters m, 0 e 5%), slow crack growth parameters (n e f0) and contrast ratio (CR), translucency parameter (TP), opalescence parameter (OP) optical properties
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2011