Akira Baba
Faculty of Engineering, Niigata University
8050 Ikarashi 2-nocho, Nishi-ku, Niigata 950-2181 JAPAN
Tel/Fax: +81-25-262-7369
E-mail: ababa@eng.niigata-u.ac.jp

Saengrawee Sriwichai
Department of Chemistry, Faculty of Science
Chiang Mai University
Chiang Mai 50200 THAILAND
Tel/Fax: +66 53 943341-5 ext. 189
E-mail: saengrawee.s@cmu.ac.th