1. Grad. Sch. of Sci. and Eng., Yamagata Univ. 4-3-16 Jonan Yonezawa, Yamagata Japan 992-8510
2. ISE CHEMICALS Corp. 1-3-1 Kyobashi, Chuo-ku Tokyo Japan 104-0031
3. ZEON Corp. 1-6-2 Marunouchi, Chiyoda-ku Tokyo Japan 100-8246
4. ROEL, Yamagata Univ. 4-3-16 Jonan Yonezawa, Yamagata Japan 992-8510