1. Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido, Gifu, Japan
2. Department of Chemistry Education, Islamic University of Kalimantan, Kayu Tangi, Banjarmasin, Indonesia
3. Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jalan Raya W. R. Supratman, Kandang Limun, Bengkulu, Indonesia