1. School of Food Science and Technology; Henan Univ. of Technology; 100 Lianhua St. Zhengzhou 450001 Henan P. R. China
2. State Key Laboratory of Food Science and Technology; Jiangnan Univ.; 1800 Lihu Ave. Wuxi 214122 Jiangsu P. R. China
3. Agricultural and Biological Engineering, and Dept. of Food Science, Whistler Center for Carbohydrate Research; Purdue Univ.; 745 Agriculture Mall Dr. West Lafayette IN 47906 U.S.A