1. Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo, Kagurazaka, Shinjuku-ku, Tokyo 162, Japan; Shiseido Basic Research Laboratories, 1050 Nippa-Cho, Kohoku-ku, Yokohama 223, Japan; and Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, Kurokami, Kumamoto 860, Japan