美[ˈmelənɪn] 英['melənɪn] n.黑(色)素 网络黑色素;拉宁;黑素 权威英汉双解 英汉 英英 网络释义 melanin n. 1. 黑(色)素a dark substance in the skin and hair that causes the skin to change colour in the sun's light...
Melanin is a dark biological pigment (biochrome) occurring in the skin, hair, feathers, scales, eyes, and some internal membranes of humans and other animals. It is formed as an end product during metabolism of the amino acid tyrosine.
Ultraviolet (UV) rays.Melanin helps protect your skin from these harmful rays, including blue light andUVA, UVB, and UVC. Melanin absorbs them and spreads them out in your skin's top layer. That keeps them from doing damage deeper inside your skin. Reactive oxygen species (ROS).These are ...
The epidermis is itself comprised of four further layers: the lowest being the basal cell layer, which is where skin cells called melanocytes continuously make the skin''s pigment, melanin. 90 per cent of cells in the epidermis are keratinocytes, which multiply and migrate upwards from the ...
Melanin is produced by melanocyte cells in the epidermis, or outermost layer of skin (the thicker, tougher layer underneath is called the dermis). These melanocytes lie in the lowermost layer of the epidermis, called the stratum basale or "basal layer." Melanin comes in several subtypes, the ...
not be absorbed into the lower layer of the skin, thus protecting the skin from sunlight and repairing skin damaged by sunlight or chemical burns. Researchers tested the effectiveness of synthetic melanin as a sunscreen. It was found that it can eliminate free radicals, protect the skin, and ...
Contain unique nd shining compound, fade spots, inhibit theformulation of melation of melanin. 含独特净白亮肤复合物, 淡化斑点的同时抑制黑色素的形成. 期刊摘选 Purely natural plant formulation, kind geniality, validity control skin base layer the melanin is born. 纯天然植物配方 、 性质温和 、 有效...
degradation than smaller melanosomes formed in lightly pigmented skin (Jimbow et al., 1999; Quevedo and Holstein, 2006). Thus, in lightly pigmented human skin the degraded melanosomes only persists as so-called “melanin dust” in the suprabasal layer of the epidermis (Brenner and Hearing, ...
Melanin noun Melaninn. (Physiol.) A black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. It is supposed...
1.The outer, protective, nonvascular layer of the skin of vertebrates, covering the dermis. 2.An integument or outer layer of various invertebrates. 3.The outermost layer of cells covering the leaves and young parts of a plant. [Late Latin, from Greek :epi-,epi-+derma,skin; seeder-inInd...