Buscar
Mostrando ítems 11-20 de 559
Novel cellulose/NbOPO 4.nH 2O hybrid material from sugarcane bagasse
(North Carolina State Univ Dept Wood & Paper Sci, 2011-02-01)
In recent years studies concerning the applications of lignocellulosic/ inorganic couples have resulted in the development of an interesting class of functional materials. In this work a cellulose/NbOPO 4.nH 2O hybrid using ...
Hydrofluoric acid concentration, time and use of phosphoric acid on the bond strength of feldspathic ceramics
(2020-03-01)
The objective of this study was to evaluate the influence of hydrofluoric acid (HF) concentration, etching time, and application of phosphoric acid (PA) followed by neutralization with sodium bicarbonate on the bond strength ...
Bond strength of lithium disilicate after cleaning methods of the remaining hydrofluoric acid
(2020-02-01)
Background: Different ceramic surface cleaning methods have been suggested after the acid conditioning. The aim was to evaluate the effect of different protocols used to remove the remaining hydrofluoric acid on the shear ...
The impact of hydrofluoric acid etching followed by unfilled resin on the biaxial strength of a glass-ceramic
(2013-10-01)
Objectives: To evaluate the null hypotheses that hydrofluoric (HF) acid etching time would neither decrease the biaxial flexural strength of a glass-based veneering ceramic nor enhance it after silane and unfilled resin ...
The impact of hydrofluoric acid etching followed by unfilled resin on the biaxial strength of a glass-ceramic
(2013-10-01)
Objectives: To evaluate the null hypotheses that hydrofluoric (HF) acid etching time would neither decrease the biaxial flexural strength of a glass-based veneering ceramic nor enhance it after silane and unfilled resin ...