1. Korea Ginseng & Tobacco Research Institute, 302 Shinsung-dong Yousung-ku, Taejon, 305-345, Korea, Department of Biology, Sungshin Woman's University, Dongseon-dong Seongbuk-ku, Seoul, 136-742, Korea, and LG Household and Personal Care R&D Institute, 84 Jang-dong Yousung-ku, Taejon, 305-343, Korea