1. Carbohydrate Lab, School of Food Science and Engineering; South China Univ. of Technology; Guangzhou 510640 P.R. China
2. Sericultural & Agri-Food Research Inst. Guangdong Acad. of Agricultural Sciences; Guangzhou 510610 P.R. China
3. Infinitus (China) Company Ltd; Jiangmen Guangdong 529156 P.R. China