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The changes on microstructure and electrical properties of Bi:2223/Ag composite as a function of the granulation and the content of the added silver powder
(Trans Tech Publications Ltd, 2005-12-01)
The Bi-Sr-Ca-Cu-O system has been one of the most studied superconducting ceramic materials for industry applications. The most of the studies with this aim are on silver/ceramic composites, due to the benefits and great ...
Effect of staining agents on color change of composites
(2012)
Composite resins are materials that can present color changing when exposed to pigments. Objective: The aim of this study was to evaluate, in vitro, the color changing of composites after immersion in different substances ...
The effect of whitening toothpastes on colour change and surface roughness of restorative materials
(Facultad de Odontología. Universidad de Costa Rica, 2023)
Temporal patterns of Species Composition of Siliceous Phytoplankton Flux in the Santa Barbara Basin
(2007)
We have examined the species composition of 127 sediment trap samples collected sequentially from the Santa Barbara Basin, USA, during a 7-year period. The sampling period included two warm-water periods (El Ninos) and two ...
Glycerol Electrooxidation on Platinum-Tin Electrodeposited Films: Inducing Changes in Surface Composition by Cyclic Voltammetry
(Springer New York LLC, 2017-01)
In this work, PtSn binary electrodeposits were prepared in three compositions and submitted to successive voltammetric cycles in presence of glycerol (1.0 mol L−1) in acidic media. Catalysts were characterized by energy ...
Influence of pre-heat treatment and different light-curing units on Vickers hardness of a microhybrid composite resin
(2009-06-01)
The aim of this study was to evaluate the hardness of a dental composite resin submitted to temperature changes before photo-activation with two light-curing unite (LCUs). Five samples (4 mm in diameter and 2 mm in thickness) ...
Influence of pre-heat treatment and different light-curing units on Vickers hardness of a microhybrid composite resin
(2009-06-01)
The aim of this study was to evaluate the hardness of a dental composite resin submitted to temperature changes before photo-activation with two light-curing unite (LCUs). Five samples (4 mm in diameter and 2 mm in thickness) ...