Transmission of UV Radiation Through Horny Layer and Epidermis in Relation to the Minimal Erythema Dose (MED)
Ultraviolet radiation of human skin leads to a number of reactions, of which erythema, reddening of the skin, is the most visible. The redness emerges a few hours after irradiation, and comes from a dilatation of the blood vessels. This dilatation is probably not a direct consequence of the radiation absorbed by the blood vessels; it is thought to be due to a substance which is liberated at a more superficial level and reaches the blood vessels by diffusion.
KeywordsStratum Corneum Diffuse Pattern Horny Layer Minimal Erythema Dose Viable Epidermis
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