1. Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada, Kobe 657-8501, Japan
2. Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
3. Materials and Analysis Department, Hyogo Prefectural Institute of Technology, 3-1-12 Yukihira-cho, Suma-ku, Kobe 654-0037, Japan
4. Machinery Business Headquarters, Hitachi Zosen Corporation 2-11, Funamachi 2-Chome, Taisho-ku, Osaka 551-0022, Japan