1. Division of Packaging Technology, Faculty of Agro-Industry; Chiang Mai University; Chiang Mai 50100 Thailand
2. Department of Chemistry, Faculty of Science; Chiang Mai University; Chiang Mai 50200 Thailand
3. Materials Science Research Center, Faculty of Science; Chiang Mai University; Chiang Mai 50200 Thailand
4. Microanalysis Department, Institute for Tropical Technology; Vietnam Academy of Science and Technology; Hanoi Vietnam