1. Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
2. Institute of Molecular Biosciences, Mahidol University, Bangkok, Nakhon Pathom 73170, Thailand
3. Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
4. Department of Microbiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
5. Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, Kasetsart University Institute for Advanced Studies, Kasetsart University, Bangkok 10900, Thailand