1. Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657
2. Faculty of Engineering, Tohoku Gakuin University, Tagajo, Miyagi 985-8537
3. Ebara Engineering Service Co., Ltd., 11-1 Haneda Asahi-cho, Ohta-ku, Tokyo 144-8610, Japan