1. College of Food Science and Engineering, Northwest A&F University, Yangling 712100, P. R. China
2. College of Biology and Food Engineering, Chongqing Three Gorges University, Chongqing 404100, P. R. China
3. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, P. R. China
4. Institute of Agricultural Products Processing, Shanxi Academy of Agriculture Sciences, Taiyuan 030006, P. R. China