What is interesting about this plot are the branches—the seemingly clear bifurcation in the distribution, which illustrates uncoupling between color and luminosity (i.e., knowing the value for one does not necessarily allow for an accurate prediction of the other). Recall that a value of 1 is...
describing only a dark-colored pigment [1]. However, the popular term “melanin” refers to polymeric pigments colored in tone from light to dark. It is synthesized
Products for parenteral use should be visually inspected before administration,when the container or the solution makes it possible, in order to possibly detect the presence of particles or of an abnormal color. Do not use in case of presence of turbidity or precipitates....
The ultraviolet frequencies responsible for tanning are often divided into the UVA and UVB ranges. UVA causes the release of preexisting melanin from the melanocytes to combine with oxygen (oxidize), which in turn creates the actual tan color in the skin. UVB induces increased melanin production....
What is claimed is: 1.A composition comprising, as an active ingredient thereof, an orotic acid derivative represented by the following general formula (1) or a salt thereof and containing 1% by weight to 99.9% by weight of water:wherein, R represents a side chain of a hydrophilic naturally...
Melanism refers to thedepositionof melanin in the tissues of living animals. Thechemistryof the process depends on the metabolism of the amino acid tyrosine, the absence of which results inalbinism, or lack of pigmentation. Melanism can also occur pathologically, as in a malignantmelanoma, a ca...
In this way, these particles look transparent and without color in the visible spectrum, while micrometric particles show Mie scattering and a whitish appearance. Recently, the use of silver nanoparticles in cosmetics had been proposed, in virtue of their anti-bacterial activity [56]. What is ...