1. Department of Applied Chemistry; School of Engineering; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
2. Research & Development Lab; Nippon Steel & Sumitomo Metal Corporation; Shintomi 20-1 Chiba Japan
3. Shinka Co. Ltd.; 3383-4, Gofuku Toyama Japan
4. School of Biological and Chemical Engineering; Zhejiang University of Science and Technology; Hangzhou 310023 P. R. China