1. State Key Laboratory of Food Science and Technology; Jiangnan University; Wuxi 214122 China
2. School of Food Science and Technology; Jiangnan University; Wuxi 214122 China
3. National Engineering Research Center for Functional Food; Jiangnan University; Wuxi 214122 China
4. Tokiwa Phytochemical Co. Ltd.; 158, Kinoko Sakura-Shi Chiba 285-0801 Japan