Abstract
1 Department of Bioenvironmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University, Gung-dong 22, Yusung-gu, Daejeon 305-764, Republic of Korea
2 Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
3 Department of Biology & Medicinal Science, Pai Chai University, Daejon 302-735, Republic of Korea