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Mostrando 25-36 de 2279 artigos, teses e dissertações.
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25. Ancoragem da prata em substratos cerâmicos para tratamento de água de consumo
Resumo A fabricação de vasos cerâmicos impregnados com prata possibilita o acesso à água potável de uma forma barata e com fabricação relativamente simples. Este estudo teve como objetivo promover a modificação superficial de filtros cerâmicos utilizando APTES e EDTA como agentes ancoradores para melhorar a impregnação da prata e a eficiência e
Cerâmica. Publicado em: 14/11/2019
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26. METALLOTHIONEIN-2A (RS1610216&RS28366003) GENE POLYMORPHISMS AND THE RISK OF STOMACH ADENOCARCINOMA
RESUMO CONTEXTO: O câncer gástrico é a quarta causa mais comum de câncer em todo o mundo. Também em contraste com os enormes avanços na cura, a chance de viver é muito baixa, mesmo em casos de cirurgia. Ter uma predisposição genética desempenha um papel importante no desenvolvimento do câncer. A associação entre polimorfismos do gene metalotio
Arq. Gastroenterol.. Publicado em: 07/11/2019
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27. Estudio de las propiedades, estructurales, morfológicas y ópticas de nanopartículas de Cr2O3 sintetizadas por procesos de combustión de un solo paso y diferentes combustibles
ABSTRACT This research presents a novel one–step solution combustion synthesis to obtain nano-structured Cr2O3 from chrome nitrate solution and one fuel such as aspartic acid (Asp) or Lysine (Lys), or Autor Restrihydroxymethylaminomethane (Tris) or ethylenediaminetetraacetic acid (Edta). Once obtained, the ashes were calcined at 500°C. The powders were ch
Matéria (Rio J.). Publicado em: 16/09/2019
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28. The Ability of Biodentine™ of Guided Tissue Remineralization (GTR): Analysis Using SEM, EDX and TEM
Abstract Objective: To analyze the Biodentine™ capability in guided tissue remineralization. Material and Methods: Four premolar with two cavities per tooth of 3 mm depth were demineralized with EDTA 17% in shaking incubator at 37ºC temperature. After 7 days, the sample were washed with aquabidest then were soaked in 20 ml NaCl 1 M (pH 7.0) at 25ºC tem
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 02/09/2019
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29. Influence of photobiomodulation therapy on root development of rat molars with open apex and pulp necrosis
Abstract This study aimed to evaluate the role of photobiomodulation (PBM) in apexification and apexogenesis of necrotic rat molars with an open apex. Rat molars were exposed to the oral environment for 3 weeks. Canals were rinsed with 2.5% NaOCl and 17% EDTA, filled with antibiotic paste and sealed. After 7 days, canals were rinsed and divided into six grou
Braz. oral res.. Publicado em: 26/08/2019
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30. Isolation and characterization of a human cementocyte-like cell line, HCY-23
Abstract Cementum is the mineralized tissue covering the tooth root that functions in tooth attachment and post-eruptive adjustment of tooth position. It has been reported to be highly similar to bone in several respects but remains poorly understood in terms of development and regeneration. Here, we investigate whether cementocytes, the residing cells in ce
Braz. oral res.. Publicado em: 15/08/2019
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31. Effect of peracetic acid used as single irrigant on the smear layer, adhesion, and penetrability of AH Plus
Abstract The aim of this study was to evaluate the effect of peracetic acid (PAA) as a single irrigant on the smear layer, on the intraradicular dentinal bond strength, and on the penetrability of an epoxy-based resin sealer into the dentinal tubules. A total of 120 roots were distributed into 4 groups according to the irrigant used in root canal preparation
Braz. oral res.. Publicado em: 29/07/2019
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32. Effect of EDTA and QMIX Ultrasonic Activation on the Reduction of Microorganisms and Endotoxins in Ex Vivo Human Root Canals
Resumo O presente estudo objetivou comparar a eficácia do QMiX e do EDTA 17% associado à irrigação ultrassônica passiva (PUI) ou agitação manual (MA) na redução de E. faecalis, E. coli e LPS de canais radiculares. Quarenta dentes humanos unirradiculares foram divididos aleatoriamente em quatro grupos (n = 10), de acordo com o protocolo final de irri
Braz. Dent. J.. Publicado em: 03/06/2019
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33. Effect of ultrasonic and Nd: Yag laser activation on irrigants on the push-out bond strength of fiber post to the root canal
Abstract Objective: This in vitro study aimed to compare the efficacy of irrigants using various irrigation activation methods to the push-out bond strengths of fiber post to root canal luted with self-adhesive resin cement (SARC). Methodology: Forty-eight decoronated human canines were used. The specimens were divided into four groups corresponding with t
J. Appl. Oral Sci.. Publicado em: 30/05/2019
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34. Determination of L-Ascorbic Acid in Milk by Ultra-High-Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry Analysis
This study provides a fast, accurate and reproducible method for L-ascorbic acid (L-AA) determination in milk samples by ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS). A small volume of a low toxicity organic solvent (ethanol) was used for degreasing and deproteinization steps. Ethylenediaminetetraacetic acid
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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35. Polyomaviruses BK and JC DNA infection in peripheral blood cells from blood donors
ABSTRACT Objectives: To investigate the prevalence of human polyomavirus (BK and JC viruses) infection in peripheral blood mononuclear cells of healthy blood donors. Methods: The study included 250 healthy blood donors. Five-milliliter blood was drawn into sterile EDTA tubes and PBMCs were isolated from whole blood. The isolated PBMCs were counted and stor
Braz J Infect Dis. Publicado em: 20/05/2019
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36. Standardization of A Sample-Processing Methodology for Stable Isotope Studies in Poultry
ABSTRACT The objective of this study was to determine if lipid extraction processes alter the isotopic value of δ13C and δ15N of tissues (pectoral muscle, thigh and liver) and eggs and if the use of anticoagulants interferes with blood and plasma δ13C and δ15N isotopic values. Samples were acquired from the same flock of birds. The 32 egg samples were ra
Braz. J. Poult. Sci.. Publicado em: 18/04/2019