1. Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515,
Japan
2. Department of Environmental
Chemistry and Engineering, Interdisciplinary Graduate School of Science
and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
3. Advanced Research Institute for
the Sciences and Humanities, Nihon University, 12-5 Gobanchou, Chiyoda-ku, Tokyo 102-8251, Japan