1. College of Food Science and Engineering; Northwest A&F Univ.; Yangling 712100 China
2. Dept. of Veterinary Medicine, College of Food and Agriculture; United Arab Emirates Univ.; Alain 15551 United. Arab Emirates
3. State Key Laboratory of Chirosciences; Dept. of Applied Biology and Chemical Technology; The Hong Kong Polytechnic Univ.; Hung Hom Kowloon Hong Kong
4. Natl. Inst. for Food and Drug Control; Beijing 100050 China