1. Department of Food and Nutrition, Sookmyung Women’s University, Seoul 140-742, Korea, Department of Animal Science and Biotechnology, Kyungpook National University, Daegu 702-701, Korea, Department of Pharmacology and Dental Therapeutics, Chosun University, Gwangju 501-759, Korea, and Department of Pharmacognocy Material Development, Kangwon National University, Samcheok 245-711, Korea