1. Department of Materials Science and Engineering and Project Research Center for Interfacial Microbiology, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan, and Microza and Water Processing Division, Asahi Kasei Chemicals Corporation, Samejima 2-1, Fuji-city, Shizuoka 416-8501, Japan