1. Dept. of Bioproduction and Environment Engineering, Faculty of Regional Environment Science; Tokyo Univ. of Agriculture; 1-1-1 Sakuragaoka Setagaya-ku Tokyo 156-8502 Japan
2. Dept. of Food Science & Technology, Faculty of Agriculture; University of Tripoli; Tripoli Libya
3. Department of Food Science; Purdue University; West Lafayette IN 47907 U.S.A
4. Dept. of Food Science and Human Nutrition; Michigan State Univ.; 135 GM Trout Building East Lansing MI 48824 U.S.A