1. Department of Food Chemistry and PhysicsInstitute of Food ResearchProduct DevelopmentKasetsart University50 ChatuchakBangkok 10900Thailand
2. Department of Applied MicrobiologyInstitute of Food Research and Product DevelopmentKasetsart University50 ChatuchakBangkok 10900Thailand
3. Department of Applied Biological ScienceFaculty of AgricultureKagawa University2393 MikiKagawa 761‐0795Japan