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Effects of ultraviolet B radiation on physicochemical properties of human hair shaft
Author(s) -
Kim Kyung Sook,
Shin Min Kyung,
Park HunKuk
Publication year - 2012
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22019
Subject(s) - chemistry , irradiation , thermogravimetric analysis , hair shaft , fourier transform infrared spectroscopy , keratin , chemical composition , morphology (biology) , ultraviolet radiation , atomic force microscopy , nuclear chemistry , materials science , hair follicle , optics , biology , nanotechnology , radiochemistry , organic chemistry , physics , genetics , nuclear physics , microbiology and biotechnology , paleontology
Changes in physicochemical properties of the human hair shaft induced by UVB during the summer climate were investigated. Using atomic force microscopy and thermogravimetric analyzer measurements, we investigated the changes in hair shaft physical properties including morphology, roughness, and water content. The changes in chemical properties were investigated by using FTIR spectroscopy. Hair samples from 20 females without any chemical or physical stresses were investigated. The samples were exposed to various UVB doses of 400, 2,000, and 4,000 mJ/cm 2 , which correspond to the radiation times of 0.44, 2.22, and 4.44 h, respectively. The morphology and surface of the hair shaft was not significantly affected by UVB irradiation. The components of keratin were affected by the UVB irradiation where the amide A bands at 3,263 and 3,246 cm −1 of the proximal and distal roots, respectively, were shifted to higher band region because α‐helix converted to β‐sheet, and the stretching modes of CH lipid alkyl chains at 2,965 and 2,850 cm −1 in the proximal and distal roots, respectively, were developed. As the UVB intensity increased, the water content of the proximal root decreased. Microsc. Res. Tech., 2012. © 2012 Wiley Periodicals, Inc.