Introduction: Discoloration of resin composites is a common reason for replacement of these restorations. The aim of this study was to eva-luate the influence of different light curing de-vices on color stability of a microhybrid resin composite.  Materials and Methods: 80 disc-shaped speci-mens (8 mm in diameter, 2-mm height) were fabricated from filtek Z250 resin composite. Specimens wer...

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Background: Color vision has an important role in daily activities and also learning special talents in different jobs, especially in the field of medicine. However, they are many people all over the world that has no insight into their color blindness and choose the study fields that are completely dependent on vision. Due to the importance of color vision in the field of medicine, we conducte...

The effect of frying pressure on the kinetics of color changes during atmospheric and vacuum deep fat frying of Reshteh Khoshkar has been studied. The Hunter color parameters redness, yellowness, lightness and total color difference were used to estimate color changes during frying as a function of process. Lightness (L*) decreased from 85.37 to 75.01 with vacuum frying time, while redness (a*)...

objectives: this study aimed to evaluate the effects of chlorhexidine mouthrinses on color stability of nanofilled and micro-hybrid resin-based composites. materials and methods: in this in-vitro study, 160 disc-shaped specimens (7x2mm) were fabricated of filtek z250 and filtek z350xt enamel (a2 shade). the samples of each group were randomly divided into eight subgroups (n=10). the specimens w...

we deal with a wide range of colors in our daily life. they are such ubiquitous phenomena that is hard and next to impossible to imagine even a single entity (be it an object, place, living creature, etc) devoid of them. they are like death and tax which nobody can dispense with. this omnipresence of colors around us has also made its way through abstract and less tangible entities via the inte...

conclusions the findings of this study indicate that older children are more proficient in comprehension of color words compared to younger children, and girls are more proficient than boys. the two easiest and two most difficult color words for children to comprehend within the 3 age groups were “black” and “red” and “phosphoric-green” and “turquoise-blue,” respectively. there was a positive r...

"> In the present study the reaction kinetic and dynamic modeling of the reactor for syngas transformation into dimethyl ether u...