Affiliation: | (1) Department of Chemistry, College of Natural Science, Chosun University, 375 Seoseok-dong, Dong-gu, 501-759 Gwangju, Korea;(2) School of Automotive & Mechanical Engineering Institute of Manufacturing & Automation System, Nambu University, 864-1 Wolgye-dong, Gwangsan-gu, 506-824 Gwangju, Korea |