UVB rays

См. также в других словарях:

• UVB — ˌyü(ˌ)vē ˈbē noun : the region of the ultraviolet spectrum which extends from about 280 to 320 nm in wavelength and from which comes the radiation primarily responsible for sunburn, aging of the skin, and the development of skin cancer * * * UVB… …   Useful english dictionary

• UVB-induced apoptosis — is the programmed cell death of cells that become damaged by ultraviolet rays. This is notable in skin cells, to prevent melanoma. Some studies have shown that exercise accelerates this process.External links*… …   Wikipedia

• UVB — [yo͞o vē bē′] n. ultraviolet light with a shorter wavelength than UVA and thus closer in size to X rays: sometimes written UV B * * * …   Universalium

• UVB — [yo͞o vē bē′] n. ultraviolet light with a shorter wavelength than UVA and thus closer in size to X rays: sometimes written UV B …   English World dictionary

• UVB radiation — A type of ultraviolet (UV) radiation. UV rays are invisible rays that are part of the energy that comes from the sun. UVB radiation causes sunburn, and scientists have long thought that it can cause melanoma and other types of skin cancer. Skin… …   English dictionary of cancer terms

• UVB — UK [ˌjuː viː ˈbiː] / US [ˌju vɪ ˈbɪ] noun [uncountable] light from the sun that has a fairly short wavelength and causes skin to go brown and look older. UVB is an abbreviation for ultraviolet B rays …   English dictionary

• Ultraviolet — UV redirects here. For other uses, see UV (disambiguation). UVB redirects here. For the mysterious shortwave radio station in Russia, see UVB 76. For other uses, see Ultraviolet (disambiguation). False color image of the Sun s corona as seen in… …   Wikipedia

• Photoaging — or photoageing[1] (also known as Dermatoheliosis [2]) is a term used for the characteristic changes induced by chronic UVA and UVB exposure.[3]:29 Tretinoin is the best studied retinoid in the treatment of photoaging[4] The deterioration of… …   Wikipedia

• Tanning bed — A tanning bed or sunbed is a device emitting ultraviolet radiation (typically 95% UVA and 5% UVB, +/ 3%) used to produce a cosmetic tan. Regular tanning beds use several fluorescent lamps that have phosphor blends designed to emit UV in a… …   Wikipedia

• Vitamin D — is a group of fat soluble prohormones, the two major forms of which are vitamin D2 (or ergocalciferol) and vitamin D3 (or cholecalciferol).cite web|url=http://dietary supplements.info.nih.gov/factsheets/vitamind.asp|title=Dietary Supplement Fact… …   Wikipedia

• Sun tanning — describes a darkening of the skin (especially of fair skinned individuals) in a natural physiological response stimulated by exposure to ultraviolet (UV) radiation from sunshine or from artificial sources such as a tanning bed. With excessive… …   Wikipedia