1. Food Technology Research Center; Hiroshima Prefectural Technology Research Inst; 12-70 Hijiyamahon-machi Minami-ku Hiroshima 732-0816 Japan
2. Dept. of Bioscience and Biotechnology, Faculty of Agriculture; Kyushu Univ; 6-10-1 Hakozaki Higashi-ku Fukuoka 812-8581 Japan