1. Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat 11630, Indonesia
2. Department of Chemistry and Bio-Science, Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
3. Department of Physics, Faculty of Education and Regional Studies, 9-1 bunkyo 3-chome, Fukui 910, Japan