1. Green Chemistry Division, Korea Research Institute of Chemical Technology, Yuseong-Gu, P.O. Box 107, Daejeon 305-600, Republic of Korea
2. College of Agriculture and Life Science, Chungnam National University, Yuseong-Gu, Daejeon 305-764, Republic of Korea
3. Vietnam Chemicals Agency, Ministry of Industry and Trade, 91 Dinh Tien Hoang Street, Hanoi, Vietnam