1. Div. of Animal Science; Chonnam National Univ; Gwangju 500-757 South Korea
2. Div. of Food and Nutrition; Chonnam National Univ; Gwangju 500-757 South Korea
3. School of Mechanical Engineering; Sungkyunkwan Univ; Suwon 440-746 South Korea
4. Food Research Inst; Seongnam 463-746 South Korea
5. Dept. of Food Science, Univ. of Guelph; Canadian Research Institute for Food Safety; 000 Guelph ON N1G 2W1 Canada