1. Food Science and Technology Programme, Dept. of Chemistry; National Univ. of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
2. College of Bioscience & Biotechnology; Fuzhou Univ; Fuzhou 350108 China
3. College of Biological Engineering; Hevnan Univ. of Technology; Zhengzhou Henan 450052 China
4. National Univ. of Singapore (Suzhou) Research Inst; 377 Lin Quan Street, Suzhou Industrial Park Suzhou Jiangsu 215123 China