1. State Key Lab of Food Science and Technology; Jiangnan University; Wuxi Jiangsu 214122 P. R. China
2. International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology; Jiangnan University; Wuxi Jiangsu 214122 P. R. China
3. Department of Chemical Engineering; University of Michigan; Ann Arbor MI 48109-2136 USA