1. Department of Food Science and Nutrition, Doshisha Women's College of Liberal Arts, Kamigyo-ku, Kyoto, 602-0893, Japan.
2. Present address: Department of Home Economics, Shukugawa Gakuin College, 6-58 Koshikiiwa-cho Nishinomiya, 662-8555, Japan.
3. Corresponding author. Phone: +81-75-251-4214. Fax: +81-75-251-4289 or 4214. E-mail: knishimu@dwc.doshisha.ac.jp