1. Laboratory of Food Chemistry and Nutrition Science, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No.2 Yuan Ming Yuan West Road,
Haidian District, P.O. Box 5109, Beijing 100193, P. R. China
2. School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland