1. Department of Applied Biological Chemistry, Graduate School of Agriculture; Kinki University; Nara 631-8505 Japan
2. Department of Welfare Systems and Health Science, Faculty of Health and Welfare Science; Okayama Prefectural University; 111 Kuboki Soja-shi Okayama 719-1197 Japan
3. Department of Food and Nutrition, Faculty of Home Economics; Kyoto Women's University; Kyoto 605-8501 Japan