1. Department of Applied Chemistry and Biotechnology, Chiba University, Inage-ku, Chiba 263-8522, Japan
2. Nippon Rensui Co., Minami-Otsuka, Toshima-ku, Tokyo 170-0005, Japan
3. Environment Purification Research Institute Co., Shinden-machi, Takasaki, Gunma 370-0833, Japan