The aim of this study was to evaluate the influence of accelerated aging (AAA) on the color stability of resin cements for bonding ceramic laminate veneers of different thicknesses. The occlusal surfaces of 80 healthy human molars were flattened. Ceramic laminate veneers (IPS e-max Ceram) of two thicknesses (0.5 and 1.0 mm) were bonded with three types of luting agents: light-cured, conventiona...

The shelf life and oxidative stability of refrigerated raw ground beef enriched with omega-3 and/or conjugated linoleic acid (CLA) were studied. Grape seed extract (GSE) was used to inhibit lipid oxidation in the ground beef. Eight treatments of ground beef were established according to the enrichment of beef (control, enriched with omega-3, with CLA, or with omega-3 plus CLA) and the use of GS...

The aims of this study consist on anthocyans isolation from black grapes skin by different extraction methods in order to select the best choice, as well as the spectrophotometric characterization of anthocyans extracts (quantitative analysis, indices for pigment degradation, color density, polymeric color and stability study during time at ambient temperature). The study is justified by two ma...

Xanthylium derivatives are yellow to orange pigments with a glyoxylic acid bridge formed by dimerization of flavanols, which are built by oxidative cleavage of tartaric acid. Although their structure and formation under wine-like conditions are well established, knowledge about their color properties and their occurrence and importance in wine is deficient. Xanthylium cations and their correspo...

background to achive natural and harmonic restoration color, shade matching is a commonly used method in dental practice using shade guides. to prevent infection,shade guides are required to be disinfected .using of disinfection solutions gradually affect the color of dental equipment. the aim of this study was to evaluate the effect of three disinfectants sodium hypochlorite solution 5/25%, de...

OBJECTIVES The purpose of this study was to assess the color change of three types of composite resins exposed to coffee and cola drink, and the effect of repolishing on the color stability of these composites after staining. MATERIALS AND METHODS Fifteen specimens (15 mm diameter and 2 mm thick) were fabricated from microhybrid (Esthet-X; Dentsply and Filtek Z-250; 3M ESPE) and high-density ...

the effect of cinnamomum zeylanicum essential oil (czeo) at two concentrations (0.02% and 0.04% v/w) on chemical composition, ph, water activity (aw), lipid oxidation, color stability and sensory characteristics of lyoner-type sausage stored at 4 ˚c for 40 days was investigated. the moisture content of the control sample was higher (p < 0.05) than czeo incorporated samples, while fat, ash and p...

The spectral stability of illumination is an important aspect in color machine vision. The physical properties of lamps may change the spectrum of the illumination with time. In this work we examine the robustness of different color spaces against spectrally varying illumination in industrial wood defect inspection, when the inspection system is not adapted to the variations of illumination. Th...