452 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS skin, surface composition, 287 triboelectric charging surface modification, 189 Ozonolysis triboelectric charging, surface modification, 189 PABA solubility parameter, 319 Palmitic acid shampoo detergency, 271 solubility parameter, 319 P-aminobenzoate sunscreen substantivity, 355 P-amino benzoic acid substantivity in vivo, in vitro, 355 Panthenol in cream, 143 solubility parameter, 319 PEG solubility parameter, 319 Pentaerythritol rosinate solubility parameter, 319 Pentane solubility parameter, 319 Perhydrosqualene emulsions occlusivity, 255 Permeability epidermis barrier property, 287 steroids epidermal surface, 303 Petrolatum allergen testing, 159 emulsions, 255 solubility parameter, 319 pH dyes, diffusion, 1 uptake, 31 Phenacetin neutralizer, 61 surface tension values, 393 Phenethyl alcohol solubility parameter, 319 Phenoxyethanol solubility parameter, 319 2-phenylbenzimidazolsulfonic acid in sunscreens, 125 Phosphorus skin composition surface, 287 Phototoxicity in vitro assay oil materials, 425 Plastic flow sedimentation suspension, 393 Plasticity stratum corneum, 177 Plasticizers solubility parameter, 319 Pliability stratum corneum, 177 P-methoxycinnamic acid esters in sunscreens, 125 Polarity solubility parameter cosmetic formulations, 319 suspensions stability, 393 Polyacrylic acid humectant sorption, 39 Poly(arylomethylstyrenes) triboelectric charging Hammet correlation, 189 Polycarbonate bisphenol-A triboelectric charging film preparation, 189 Polyethylene solubility parameter, 319 triboelectric charging Hammet correlation, 189 Polymers work function triboelectric charging, 189 Poly(methacrylamidopropyltrimethyl ammonium chloride) triboelectric charging, 189 Poly(methylmethacrylate) triboelectric charging film preparation, 189 Polyols sedimentation density, 393 Polysorbate in solution effect on steroids, 303 Polystyrenes triboelectric charging Hammet correlation, film preparation, 189 Potassium dichromate allergen delayed contact hypersensitivity testing, 159 Powders contact angles, suspensions, 393 PPG methyl ether solubility parameter, 319 P-phenylenediamine allergen delayed contact hypersensitivity testing, 159 dye uptake, 31 Pristane solubility parameter, 319 Profilimetry skin geometric characteristics, 143 Propane solubility parameter, 319 2-propanol sunscreen substantivity, 335 Propellant solubility parameter, 319 Propyl acetate solubility parameter, 319 Propyl alcohol solubility parameter, 319 Propylene carbonate solubility parameter, 319 Propylene glycol effects on steroids absorption, vasoconstruction, 303 solubility parameter, 319 suspensions flocculation, 393 Propylparaben in cream, 143 Protein keratin analysis, 17 Pseudomonas aeruginosa resistance imidozolidinyl urea, 413 Pseudomonas cepacia resistance imidozolidinyl urea, 413 Pseudomonas putida resistance imidozolidinyl urea, 413 Pseudoplasticity sedimentation viscosity, 393 P-tolvenesulfonylmethylnitrosamide chromatographic characteristics HPLC-TEA analysis, 213 Pyridine solubility parameter, 319 Pyrithion salts assay methods, 373 Quaternium matrices NDELA determination, 223 resistance cosmetics, 413 Quenching phototoxicity, 425 Race Negroid hair, fracture behavior, 39 Caucasian comparison of Negroid hair fracture behavior, 39 skin topography, 143 cystine content in hydrolysates, 363

SUBJECT INDEX 453 Reduction hair, 189 Reflectance technique dye uptake hair, wool, 31 Relaxers hair fracture behavior, 39 Retinyl palmitate in cream, 143 Rheology sedimentation suspension, 393 Roughness skin quantitative surface analysis, 105 profilemetry measurements, 143 dermatitis, 153 Rubbing hair triboelectric charging, 189 Saccharomyces cerevisiae in vitro assay phototoxicity, 425 Salicyl artils triboelectric charging Hammet correlations, 189 Salicylic acid surface tension values, 393 Salts viscosity xanthan gum solution, 393 Sanguinaria extract control of oral malodor, 297 Sebum composition shampoo detergency, 271 Sedimentation suspension stability, 393 Serine keratin amino acid analysis, 17 Shampoo detergency, 271 hair ultrastructural changes, 53 Shear rates suspension stability, 393 Shear waves skin attenuation, 169 Silica suspensions hydrogen bonding, 393 Silica column chromatography clean-up technique NDELA determination in cosmetics, 223 Silicon skin composition surface, 287 Silver methenamine hair reduction kinetics, 75 Skin dermatitis topical properties, 153 effects of sunscreen, 125 emulsions moisture, 255 guinea pigs phototoxicity, 425 irritation, 251 mechanical properties influence of environmental and biological factors, 169 elasticity, 335 percutaneous absorption influence of depletion, 237 soap substantivity, antibacterial activity, 231 stratum corneum dryness, 177 sunscreen substantivity, 355 surface lipids, 153 quantitative analysis, 105 composition, elemental, chemical, 287 topography profilimetry, 143 Soap antibacterial activity, 231 Sodium acetate buffer solution hair reduction, triboelectric charging, 189 Sodium alpha olefin C14-C16 sulphonate surfactant shampoo, 271 Sodium borate in cream, 143 Sodium capryl sulfate solubility parameter, 319 Sodium chloride concentration dye uptake, 31 hair bleaching, 61 oxidation, 363 suspensions viscosity, flocculation, 393 Sodium citrate viscosity xanthan gum solution, 393 Sodium dodecyl surfactant, 189 Sodium dodecyl sulfate hair, 39 Sodium lactate humectant effects on emulsions, 255 stratum corneum rheological properties, 177 Sodium laureth sulfate skin lipid removal, 287 Sodium lauryl sulfate hair cleansing, 1 dye deposition, 31 skin lipid removal, 287 solubility parameter, 319 surfactant 297, shampoo, 271 Sodium 5-pyrrolidone-2-carboxylate humectant effects on emulsion, 255 Sodium stannate neutralizer, 61 Sodium stearate solubility parameter, 319 Solubility parameter cosmetic formulations, 319 Solutions ammonium hydroxide, 61 aqueous ethanol dyeing of hair, 1 nonionic surfactants, 393 aqueous hydroxy acid stratum corneum, 17 hexane soiling process, 271 humectant polyacrylic, glycerin, dimethyl sulfuxide, polyacrylic acid, 39 hydrogen peroxide, 61 lactic acid, 177 pH dye uptake, 31 sodium lauryl sulfate cleansing of hair, 1 Solvents cosmetics NDELA determination, 223 composition dye diffusion, 1 skin lipid removal, 287 solubility parameter, cosmetic formulations, 319 Sorbic acid solubility parameter, 319 Sorbitan laurate solubility parameter, 319 Sorbitan monooleate emulsions, 255 ester surfactant, 255 Sorbitan stearate in solution effect on steroids, 303 Sorbitol sedimentation density, wetting, 393 Sorption bands sulfonate linkages, 61 dansyl chloride, 125 dye absorption, desorption, 1 hair humectant-treated, 39 percutaneous depletion, 237