title: [Photoisomerization of provitamins D under influence of various ultraviolet radiation].
abstract: The influence of various sources of ultraviolet radiation on the photoisomerization of provitamins D--ergosterol and 7-dehydrocholesterol--was studied under industry-like conditions. The yield of previtamins and, consequently, vitamins D was higher with the use of erythemic lamps with luminophore E-2 and luminophore E-3 than with the use of lamps PRK-2.
mesh_terms: D002784:Cholesterol / Q000031:analogs & derivatives* / Q000528:radiation effects; D004875:Ergosterol / Q000528:radiation effects*; D007536:Isomerism; D008722:Methods; D011830:Radiation Effects; D014466:Ultraviolet Rays; D014807:Vitamin D / Q000528:radiation effects*
chemical_list: D014807:Vitamin D; D002784:Cholesterol; D004875:Ergosterol
vernacular_title: Fotoizomerizatsiia provitaminov D pod deĭstviem ul'trafioletovogo izlucheniia razlichnykh istochnikov