Avaliação da termociclagem sobre a estabilidade de cor de diferentes matizes de resina composta

The objective was to evaluate the effect of thermocycling on the color variation of three different composite resins . We studied was Resin Enamel on 3 levels : ( Esthetic X , Opallis and Venus ) ; Resin Dentin in three levels : ( Esthetic X , Opallis and Venus ) and Thermocycling on level 1 : ( 3,000 cycles ) ; variable was the change of color gauged by spectrophotometry . 60 specimens , subdivided into 6 groups were made : GI - Esthetic X Enamel ; GII - Esthetic X dentin ; GIII - Opallis Enamel ; GIV - Opallis dentin ; GV - Enamel and GVI Venus - Venus dentin . The specimens were prepared with a matrix to standardize samples . The inserts of incrementally resins and polymerized with a halogen light Ultralux unit ( Dabi Atlante , Brazil ) with a power of 450mW / cm ² . After fabrication , underwent color reading with a UV Visible Spectrophotometer reflection , UV -2450 ( Shimadzu , Kyoto , Japan ) , with the changes calculated by the system CIE L * a * b * . Then isolates were stored in artificial saliva at 35 ° C ± 2 ° C during 3 months containers being subjected to the effects of thermal cycling for 3000 cycles over the range of 5C to 55C . Again subjected to chromatic evaluation. For the analysis of the results of color change of the studied resins was applied ANOVA two factors at 5 % . The results showed a statistically equal resins enamel GI and GV ( p = 0.79 ) ; the same was not observed for GI and G III resins , where the color change was higher for resin G III ( p = 0.0000002 ) . The same was observed between G III and GV , where the resin enamel G III showed a statistically superior to the color change ( p = 0.0000005 ) Average . Resins to dentin was there a statistical equality between the materials studied . We conclude that the resins studied change in color and resin enamel G III was the most suffered major color changes after aging by thermocycling .

Quimiluminescência como fonte de luz alternativa na terapia fotodinâmica

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Efeitos do uso de programas de luz e de triptofano suplementar na dieta sobre o desempenho, comportamento e parâmetros de estresse de leitões recém-desmamados

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Inserção de conceitos e experimentos físicos nos anos iniciais do ensino fundamental: uma análise à luz da teoria de vigotski

In this paper, we analyze the educational importance of teaching Physics in the early grades of elementary school from a teaching experience with students of 5th grade, using five experiments on electricity and magnetism. The theoretical framework used was the socio-historical psychology, especially Vigotski's studies on concept formation. It can be stated that the teaching of Physics and the use of experimental activities in the early grades cannot be simply associated to the teaching of certain scientific concepts, but should be explored bearing in mind the child's development.

A variação e o preconceito linguístico na escola à luz sociolinguística e dos PCNs

Nowadays questions involving the use of social and cult language approach at the school has produced discussions between teachers, thus the use of the linguistics registers different of that considered correct aren’t accept or analyzed in the context of the classroom, although the national curriculum framework recommend it. So, there are many difficulties of socialization by the students principally that ones who come from the surrounding regions, if they use the linguistics approach differently of the accepted as a model. The objective of this paper is to analyze those questions, involving variation and prejudice in the classroom context, from the Sociolinguistics point of view how this science has been applied in the classroom context, considering the curriculum proposals of 1992 and the national curriculum .

Instituições de Ensino Superior na transição para uma sociedade ambientalmente mais sustentável: grandes temas em debate à luz do conceito de sistema de gestão ambiental

Este artigo tem o propósito de examinar os desafios e oportunidades relacionados à implementação de sistemas de gestão ambiental baseados na Norma ISO 14001:2004 nas Instituições de Ensino Superior e como elas podem se adequar aos requisitos para possuir um sistema de gestão ambiental (SGA). O estudo envolve análises sobre as implicações da adoção de sistemas de gestão ambiental por universidades e sobre os aspectos relevantes na adoção de SGAs com base na Norma ISO 14001, como barreiras, benefícios, motivações, práticas e fatores críticos de sucesso. Luzes são lançadas, assim, a um tema de crescente importância (sistemas de gestão ambiental), com foco em objeto analítico ainda pouco analisado do ponto de vista ambiental (Instituições de Ensino Superior).

Investigação das propriedades ópticas de ZnO e ZnO:Al

Pós-graduação em Ciência e Tecnologia de Materiais - FC

Estrutura supramolecular de um derivado de perileno em filmes finos fabricados por evaporação térmica a vácuo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Temperatura, luz e tolerância à dessecção na germinação de sementes de açaí-do-Amazonas

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Elementos constitutivos do humor em sitcoms: uma análise à luz dos estudos da tradução baseados em corpus

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Repensando o sentido formativo da atividade filosófica à luz do “Trabalho sobre si-mesmo” de Wittgenstein: se filosofar é trabalhar sobre si, o que se trabalha quando se filosofa?

Pós-graduação em Educação - FFC

Assistência em saúde: revisão integrativa do conhecimento produzido à luz da complexidade

This is part of an integrative review whose object of study was the production of knowledge in journals concerning nursing studies that have used the Theory of complexity as a theoretical framework. This study gathers seven articles collected from a literature review of 18 publications found on the databases: Medical Literature Analysis and Retrieval Sistem on-line (MEDLINE), Literatura Latino-Americana e do Caribe emCiências da Saúde (LILACS) and Cumulative Index to Nursing and Allied Health Literature (CINAHL) from 1998 to 2008. In the two former databases, the following combination of key words was used: “complexity theory” and “health” and “nursing”, and in the third: “complexidade” and “saúde” and “enfermagem. Content analysis was the methodological framework that allowed for organizing the knowledge aggregated in the theme: Health Care. It was observed that the Complexity Theory has based the comprehension of the health care process, pointing out the care provider with his practices and the environment.