1. Chief Researcher, Kurita Water Industries Ltd., 1-1 Gochoyama, Kawada, Nogi-machi, Shimotsuga-gun, Tochigi 329-0105, Japan (corresponding author).
2. Chief Researcher, Kurita Water Industries Ltd., 1-1 Gochoyama, Kawada, Nogi-machi, Shimotsuga-gun, Tochigi 329-0105, Japan.
3. General Manager of R&D Division, Kurita Water Industries Ltd., 1-1 Gochoyama, Kawada, Nogi-machi, Shimotsuga-gun, Tochigi 329-0105, Japan.
4. Senior Researcher, Paques BV, P.O. Box 52, 8560 AB Balk, The Netherlands.