Effects of Ultraviolet Radiation on Microorganisms and Animal Cells

摘要: The photobiologic reactions of multicellular organisms depend upon what happens to individual living cells within their organ systems, which in turn is determined by intracellular photochemical reactions. Ultraviolet radiation may inactivate enzymes numerous biologic systems producing alterations proteins. Peptide bonds be split, oxidations occur, sulfide and disulfide altered, DNA photochemically changed. In order for this photochemistry must absorbed, providing the molecular activation energy initiate All absorption radiant energy, however, does not lead photochemistry, because competition other mechanisms dissipating absorbed such as fluorescence, phosphorescence, or nonradiative deexcitation.