1. Department of Food Science and Technology, University of Georgia, Athens, Georgia 30602
2. Department of Nutrition and Health Science, Chung-Chou University of Technology, Yuan-Lin, Chang-Hua 503, Taiwan
3. Department of Life Science, National Taiwan Normal University, Taipei 116, Taiwan
4. Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan
5. Institute of Plant and Microbial Biology, Academia Sinica, Nankang, Taipei 11529, Taiwan