779 resultados para cycling infrastructure


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The purpose of this study was to investigate the effect of thermal cycling and disinfection on the microhardness of acrylic resins denture base. Four different brands of acrylic resins were evaluated: Onda Cryl, QC 20, Classico and Lucitone. Each brand of acrylic resin was divided into four groups (n = 7) according to the disinfection method (microwave, Efferdent, 4% chlorhexidine and 1% hypochlorite). Samples were disinfected during 60 days. Before and after disinfection, samples were thermal cycled between 5-55 °C with 30-s dwell times for 1000 cycles. The microhardness was measured using a microhardener, at baseline (B), after first thermal cycling (T1), after disinfection (D) and after second thermal cycling (T2). The microhardness values of all groups reduced over time. QC-20 acrylic resin exhibited the lowest microhardness values. At B and T1 periods, the acrylic resins exhibited statistically greater microhardness values when compared to D and T2 periods. It can be concluded that the microhardness values of the acrylic resins denture base were affected by the thermal cycling and disinfection procedures. However, all microhardness values obtained herein are within acceptable clinical limits for the acrylic resins. © 2013 Informa UK Ltd.

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Ofrece una metodologia para evaluar el efecto de los proyectos de infraestructura (abastecimiento de agua, saneamiento, eliminacion de desechos solidos, carreteras y senderos y energia) sobre las caracteristicas socioeconomicas de las comunidades involucradas.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Includes bibliography

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A vision of the role played by infrastructure, transport and related services in the development of competitiveness and productivity is fundamental for proposing public policies linked to productive development. In particular, the supply costs and the quality of public utility and transport services are extremely relevant to countries’ productivity, GDP growth and competitiveness, and also for the development and economic integration of Latin America.

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This edition of the FAL Bulletin presents a summary of the major outcomes of the workshop, “Toward an integrated transport policy: institutions, infrastructure and logistics”, which was organized by the ECLAC Infrastructure Services Unit, in late 2009. The objective of the event was to analyse the various government bodies involved in the transport sector, Chile’s experience in formulating transport policy and the challenge that formulating and executing integrated policies entails.