1. Division of Chemistry, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University
2. Department of General Science, Faculty of Science and Engineering, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus
3. Chemistry Program, Faculty of Science and Technology, Sakon Nakhon Rajabhat University
4. Division of Biology, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University