324 JOURNAL OF COSMETIC SCIENCE (20) H. Bunjes, K. Westesen, and M. H. J. Koch, Crystallization tendency and polymorphic transitions in triglyceride nanoparticles, I,t. J. Pharm., 129, 159-173 (1996). (21) De•tsches Arz,eib•ch 1998 (Deutscher Apotheker Verlag, Stuttgart, & Govi Verlag, Frankfurt, 1998). (22) M. A. Thevenin, J. L. Grosslord, and M. C. Poelman, Sucrose esters/cosurfactant microemulsion sys- tems for transdermal delivery: Assessment of bicontinuous structures, Ira. J, Pharm., 137, 177-186 (1996). (23) G. Marti-Mestres and F. Nielloud, "Main Surfactants Used in the Pharmaceutical Field," in Pharma- ceutical Emulsions and S•spensions, F. Nielloud and G. Marti-Mestres, Eds. (Marcel Dekker, New York, Basel, 2000), pp. 1-18. (24) B. Brancq, Development and trends of sugar derived surfactants, Seifen, (Sle, Fette, Wachse, 118, 905-906 (1992).

j. Cosmet. sci., 52, 325-327 (September/October 2001) Abstracts Journal of the Society of Cosmetic Chemists Japan Vol. 34, No. 4, 2000* Impression of Physical Appearance and Its Influence to Others Mariko Yamamoto Department of Psychology, University of Tsukuba In this review, the author's research on the influence of physical appearance (with the focus on the face) impression on self and others, and an overview of the studies on the physical appearance is presented. First, I present the controllability of appearance in impression change. That is, even the same physical appearance has both easy aspect and difficult aspect to change impression. Moreover, it is indicated that depending on the high and low controllability of impression change, there might be differences in the content changed impression. Next, the inl•)rmation processing of physical appearance is presented. The information on physical appearance has a strong influence on the information processing of others, especially with regard to earlier stage. The influence involves stereotypes of appearance. In addition, depending on the lkatures of physical appearance how the behavior of self and others is influenced is discussed. Finally, operating the process of self presentation through physical appearance and individual differences regarding sensitiveness to self presentation are discussed. Reduction of Langerhans Cell Number by Repeated Challenges of Low Dose UVB IrradiationYukiko Ishitsuka, Takuji Masunaga, Chiharu Koide, Kumi Arakane Fundamental Research Laboratory, KOSE Corporation important in developing sun care cosmetics. While the damages caused by exposure to high dose ultraviolet irradiation have been studied so far, the influence of repeated low dose ultraviolet irradiation has remained unclear. The purpose of this study was to clarify the influence of repeated sub erythema ultraviolet irradiation to the skin, and to investigate the effect of natural herbs preventing ultraviolet damage to develop skin care products. The backs of hairless mice were exposed to ultraviolet (UVB) irradiation at 100 mJ cm2xl time, 50Mj cm2 (1MED)x2 times, 25mJ cm2x4times, or 10mJ cm2xl 0 times, followed by taking the skin specimens for histochemical examinations. The population of epidermal Langerhans cells in the specimens, which was employed as a marker for skin damage, exposed to repeated sub erythema doses was reduced to approximately 40 of non irradiated control, whereas that in the specimen exposed to a single high dose was only 67. Furthermore, Langerhans cells demonstrated less dendricity with exposure to ultraviolet irradiation. Clearly, the repeated sub erythema doses induced greater damage than the single high dose exposure. Besides, we found that Phellodendron bark extract and Glycyrrhiza extract were effective in combating ultraviolet induced reduction of Langerhans cells number. In conclusion, the repeated challenges of even sub erythema ultraviolet irradiation to which we are exposed in daily life can cause substantial damage to the epidermis, and it is necessary to prevent this damage. It is common knowledge that ultraviolet irradiation damages human skin. Understanding the mechanism by which this damage occurs is * These abstracts appear exactly as they were originally published. They have not been edited by the Journal of Cosmetic Science. 325