436 JOURNAL OF COSMETIC SCIENCE Skin moisturization influence of occlusive compounds on, 313 long-term results of, 23, 79 one-hour measurements of, 23 short-term measurements of, effect of glycerin, 13 single treatments, 79 Sodium chloride effect on short-term measurement of skin moisturization, 13, 79 Solvent(s) composition in hairspray, 281 Spectroscopy (see also X-ray fluorescence) secondary ion mass, to study penetration of oils into hair, 169 Stratum corneum (see also Skin) barrier damage of, 86 delivery of active ingredients in, 346 lipid pathlength in, 339 skin surface relief, 326 thickness of, 91 UV filters in, 1 Sun exposure and lack of melanosome caps, 91 and melanin, 91 and migration of melanosomes, 91 and stratum corneum thickness, 91 Sunscreens combination products, 408 ethyl cellulose in, 253 as filters of ultraviolet radiation, 1 gemini surfactants for, 414 photostability of, 1, 412 SPF improvements in, 410 UVA protection by, 412 Surfactants (see also Cationic polymers Polymers Emulsifiers) effect on synthesis of silicone latex, 153 gemini, in sunscreens, 414 nonionic, 421 in self-preserving formulas, 423 surfactin sodium salt, 153 Ultrasonography in measurement of skin thickness, 391 Ultraviolet radiation damage on hair, 103 low-dose UVB irradiation and reduction of Langerhans cell number, 325 Retinol degradation from, 77 sunscreen filters of, 1 UVB and up regulation of melanin, 327 Vitamin E (ot-tocopherol) as antioxidant, 35, 155, 225 bioconversion from vitamin E acetate (ot-tocopheryl acetate), 155 distribution in human skin, 155 kinetics of permeation and metabolism of, 35 permeation profile of, 35 quantification by HPLC, 155 Vitamin E acetate (ot-tocopheryl acetate) as antioxidant, 35, 155,225 bioconversion to vitamin E (ot-tocopherol), 155 delivery of, 225 kinetics of permeation and metabolism of, 35 metabolism of, 225 permeation profile of, 35 quantification by HPLC, 155 Whitening agents evaluation method for, 95 X-ray fluorescence for estimation of elemental content in hair, 297 to study oil deposition from shampoo, 131