948 resultados para Somas conexas de superfícies


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Pós-graduação em Engenharia Mecânica - FEIS

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Pós-graduação em Física - FEG

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Pós-graduação em Geologia Regional - IGCE

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Pós-graduação em Enfermagem (mestrado profissional) - FMB

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Pós-graduação em Odontologia Restauradora - ICT

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The purpose of this study was to evaluate in vitro the shear bond strenght to bovine dentin, during 24h and 30 days with the following variables: resin cements Enforce and Panavia F; aesthetics restorative materials Art Glass, IPS Empress 2 and Targis, with surface treatment with microetching with aluminium oxide, fluoridric acid and silane. Two hundred eighty eight sound bovine teeth from 3 years old animals constituted the samples after inclusion on polyester resin box. lnstron model 430 Universal Testing Machine, a crosshead speed 0,5 mm/min and load cells of 500 Kg, was used for shear bond strenght testing (MPa). The results were statistically analysed by ANOVA The best result was obtained with /PS Empress 2, microetched with aluminium oxide, fluoridric acid and silane, cemented with Panavia F and stored in distilled water, 3f'C during 30 days

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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This article aims to investigate the construction of reflective abstraction and relate it to the construction of social knowledge. So, two methodological tools were applied to 60 students aged between ten and 16 years: a) evidence of the construction of surfaces and perimeters b) clinical interview about the origins of Earth and life. The main results show that participants were presented at more elementary levels of constuction of reflective abstraction and contruction of social knowledge despite the advanced age and schooling. Statistical analysis revealed a highly significant relationship between the constuction of abstraction and social knowledge.