1. Gansu Innovation Center of Fruit and Vegetable Storage and Processing, Agricultural Product Storage and Processing Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
2. New Rural Development Research Institute of Northwest Normal University, Lanzhou 730070, China
3. Gansu Provincial Maternity and Child-care Hospital, Lanzhou 730050, China
4. College of Food and Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
5. Department of Biology, Faculty of Education, University of Khartoum, Khartoum 11111, Sudan