1. Research Institute for Food Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan, Department of Human Life Science, Seibo Jogakuin Junior College, Fukakusa, Fushimi-ku, Kyoto 612-0878, Japan, and Department of Food and Nutrition, Sugiyama Jogakuen University, Hoshigaokamotomachi, Chikusa-ku, Nagoya 464-8662, Japan