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Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups
Resumo Este estudo avaliou a influência de um preparo retentivo em forma de ombro para prevenir a falha precoce de núcleos de preenchimento realizados em molares com 3 diferentes tipos de resina composta. Noventa e seis terceiros molares superiores hígidos extraídos de humanos, foram divididos em dois grupos (n=48) de acordo com o tipo de redução oclus
Braz. Dent. J.. Publicado em: 28/11/2019
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2. Use of intrarradicular pins in primary teeth: case report of one year of accompanying
RESUMO Os dentes decíduos possuem um papel importante no crescimento e desenvolvimento da criança, além de serem importantes para o bom desempenho da função mastigatória, fonação, oclusão e estética, são os melhores mantenedores de espaço e guia de erupção para o sucessor permanente. Para região anterior, existem diferentes alternativas de tra
RGO, Rev. Gaúch. Odontol.. Publicado em: 12/09/2019
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3. Evaluation of Standard API Casing Connections and Parametric API Buttress Improvement by Finite Element Analysis
Threaded and coupled connections generally present a non-uniform stress distribution, which is related to the higher stiffness of the box when compared to the pin. The non-uniform stress distribution can contribute to fatigue cracks and other failure modes in high pressure oil wells. An API 5CT P110 steel obtained from a seamless pipe was mechanically charac
Mat. Res.. Publicado em: 08/12/2016
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4. Morphological changes and growth of filamentous fungi in the presence of high concentrations of PAHs
In this study, we evaluated the effect of low and high molecular weight polycyclic aromatic hydrocarbons (PAHs),
i.e. , Phenanthrene, Pyrene and Benzo[a]pyrene, on the radial growth and morphology of the PAH-degrading fungal strainsAspergillus nomius H7 andTrichoderma asperellum H15. The presence of PAHsBraz. J. Microbiol.. Publicado em: 2015-09
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5. Wear and friction of composites of an epoxy with boron containing wastes
Abstract Polymer surface coatings provide superior adhesion to substrates, some flexibility and corrosion resistance. On the other hand, 400,000 ton of boron wastes are generated each year. We have developed polymer composites based on epoxy resins containing up to 50 wt. % of boron wastes and determined their pin-on-disk dynamic friction, w
Polímeros. Publicado em: 2015-06
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6. Study on the capacity of cold-formes steel built-up battened colums under axial compression
This paper presents the theoretical and numerical investigation results of the pin ended cold-formed steel built-up battened columns under axial compression. The finite element model was developed using the finite element software ABAQUS. The comparison of finite element analysis results match with the test results available in the literature shows that the
Lat. Am. j. solids struct.. Publicado em: 2014
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7. Direct Adhesive Pin-Retained Restorations for Severely Worn Dentition Treatment: A 1.5-Year Follow-Up Report
A superfície oclusal excessivamente desgastada pode resultar em desarmonia oclusal e prejuízo à estética e função. Como abordagem terapêutica, coroas unitárias convencionais têm sido propostas, porém este tipo de tratamento é complexo, altamente invasivo e caro. Este relato de caso descreve os resultados clínicos de um tratamento alternativo mini
Braz. Dent. J.. Publicado em: 2014
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8. Effects of Serenoa Repens, Selenium and Lycopene (Profluss®) on chronic inflammation associated with Benign Prostatic Hyperplasia: results of “FLOG” (Flogosis and Profluss in Prostatic and Genital Disease), a multicentre Italian study
Objective To evaluate the efficacy of Profluss® on prostatic chronic inflammation (PCI). Materials and Methods We prospectively enrolled 168 subjects affected by LUTS due to bladder outlet obstruction submitted to 12 cores prostatic biopsy for suspected prostate cancer + 2 cores collected for PCI valuation. First group consisted of 108 subjects, with his
Int. braz j urol.. Publicado em: 2013-04
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9. Wear mechanisms of dental composite restorative materials by two different in-vitro methods
In this work two very simple apparatuses, namely the ball crater (or ball-on-plate) and the linear reciprocating (or pin-on-plate) tests, were used in order to investigate the wear mechanisms of TPH Spectrum® and Resilab Master® dental composite resins. Loads in the range of 100 g to 1 kg and a total number of up to 24000 cycles were employed. During some
Mat. Res.. Publicado em: 21/12/2012
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10. Vapor chamber heat sink with hollow fins
A new vapor chamber heat sink with maximum fin efficiency is presented. The fins are hollow, so the vapor generated at the base flows up to the top of the fins. As a result, the heat sink is practically isothermal. A prototype of the hollow fin vapor chamber heat sink was built and tested. The prototype presented 20% less overall thermal resistance than conv
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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11. Estudo das propriedades elétricas de células eletroquímicas emissoras de luz de derivados de polifluoreno / Electric properties study of polymer light-emitting electrochemical cells based on polyfluorene derivatives
Polymer light emitting electrochemical cells, PLECs, are organic electronic devices that have attracted commercial interest because they operate at low voltage and exhibit high performance without the need of specific electrodes such as indium tin oxide (ITO), calcium and others. This feature provides low cost of fabrication and exible devices. The charge in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2011
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12. Trends and predictors of changes in pulmonary function after treatment for pulmonary tuberculosis
OBJECTIVES: The present study aimed to investigate the trends in changes in pulmonary function and the risk factors for pulmonary function deterioration in patients with pulmonary tuberculosis after completing treatment. INTRODUCTION: Patients usually have pulmonary function abnormalities after completing treatment for pulmonary tuberculosis. The time course
Clinics. Publicado em: 2011