608 JOURNAL OF COSMETIC SCIENCE skinfeel and handfeel of disposable facial wipes, 100 percutaneous absorption by skincare products, 317 soothing and calming effects of N-acetyl-Tyr-Arg-cetylester peptide, 98 Solid-phase extraction Determination of methylparaben in o/w emulsions by, 47 Solvents polarity of, 87 Sonication from ultrasonic wave beauty devices, 319 Spectroscopy in vitro, of sunscreen products, 463 UV, in vitamin E acetate penetration studies, 119 Stratum comeurn (see also Skin) aqueous pore radius in, 29 interplay between corneocytes and lipids in, 102 penetration of vitamin E acetate, 119 thickness of, 108 water barrier in, 110 water-handling properties of, 289 Sun protection factors (SPFs) predictions t¾om UV filter blends, 463 Sunscreen(s) film geometry, continuous height distribution model of, 463 overview of, 86 o/w microemulsion as vehicle for, 451 phototoprotection against UV-induced reactive oxygen species, 589 photostability in, 87, 513 preservative systems in, 1 rutile-based pigments in, 513 treatment efficiency of, 513 UV filters in, 87, 463 Surfactants amphoteric, 559 anionic, 559 evaluation of, on dyed hair, 318 in multicompound fragrance, 429 non-ionic, 559 in o/w microemulsions, 451 Tape stripping quantification of vitamin E acetate penetration by, 119 separation of stratum corneum from epidermis, 161 and stratum corneum water barrier, 110 Triclosan TM antimicrobial activity of, 537 aqueous solubility of, 537 as deodorant, 251 molecular structure of, 537 Ultraviolet radiation and cutaneous skin damage, 161 effect on hair roughness and thickness, analysis by atomic force microscopy, 271 filters in sunscreens, 87, 463 and photochemical oxidation of hair, 379 protection from, by rotlie-based pigments, 513 Vitamin A and acne, 220 Vitamin C bioconversion from sodium ascorbyl phosphate within the epidermis, 589 Vitamin E acetate bioconversion to vitamin E within the epidermis, 589 penetration studies of, 119