title: [KINETICS OF PHOTO-INDUCED FREE RADICALS IN THE HUMAN HAIR CHESTNUT COLOR AFTER SHORT PERIODS OF RED, GREEN, BLUE AND WHITE LIGHT EXPOSURE].
abstract: The aim of the study was to investigate the kinetics of photo-induced free radicals in the human hair chestnut color with short-term exposure to visible light in different frequency ranges. Studies carried out on human volunteers aged 17-21 years (n=37). Hairs of volunteers of the study were not treated with dyes and other active cosmetic preparations. Hairs bundled in a bun had a length - 1.5 cm, weight - 40 mg. At the beginning background EPR-spectrum of a sample was measured and then hairs were irradiated with visible light (blue, green, red and white) of different wavelength subsequently; exposure duration - 60 minutes; after the exposure the kinetics of photo-induced free radicals was measured within 60 minutes. The radiation source was selected LED array of the four crystals that provides a nearly monochromatic radiation spectrum having no parasitic infrared and ultraviolet radiations. The studies give a reason to assume that the impact on hairs by visible electromagnetic rays a leading factor is their frequency characteristics: on the one hand - the proximity of the blue light to ultraviolet radiation, and on the other - the red light to the infrared range.
authors.affiliation: Tbilisi State Medical University; Javakhishvili Tbilisi State University, Georgia.
authors.forename: N
authors.initials: N
authors.lastname: Tskhvediani
authors.affiliation: Tbilisi State Medical University; Javakhishvili Tbilisi State University, Georgia.
authors.forename: E
authors.initials: E
authors.lastname: Chikvaidze
authors.affiliation: Tbilisi State Medical University; Javakhishvili Tbilisi State University, Georgia.
authors.forename: A
authors.initials: A
authors.lastname: Tsibadze
authors.affiliation: Tbilisi State Medical University; Javakhishvili Tbilisi State University, Georgia.
authors.forename: I
authors.initials: I
authors.lastname: Kvachadze
authors.affiliation: Tbilisi State Medical University; Javakhishvili Tbilisi State University, Georgia.
authors.forename: T
authors.initials: T
authors.lastname: Gogoladze
authors.affiliation: Tbilisi State Medical University; Javakhishvili Tbilisi State University, Georgia.
authors.forename: A
authors.initials: A
authors.lastname: Katsitadze
mesh_terms: D000293:Adolescent; D005260:Female; D005609:Free Radicals / Q000378:metabolism*; D006197:Hair / Q000378:metabolism / Q000528:radiation effects*; D006200:Hair Color; D006801:Humans; D007700:Kinetics; D008027:Light / Q000009:adverse effects*; D008297:Male; D013997:Time Factors; D055815:Young Adult
chemical_list: D005609:Free Radicals