| Date | Content |
|---|---|
| ㆍ2006.03-2006.05 | Invited Professor in Institute of Plant Physiology, Russian Academy of Science, Moscow, Russia |
| ㆍ1994.06-1994.08 | Invited Professor in Department of Horticulture, ChibaUniversity,Japan |
| ㆍ1992.06-1992.08 | Invited Researcher in InstituteofAtomicEnergy,ENENA,Italy |
| ㆍ1989.12-1990.02 | Invited Professor in Institute of Agricultural Biochemistry, TsukubaUniversity,Japan |
| ㆍ1985.07-1986.06 | Post Doctoral Fellow In Botany, Plant Physiology Research Group, of CalgaryUniversity,Canada |
| ㆍ1982.12-1983.04 | Researcher in Department of Botany, UniversityofCalifornia, Riverside, USA |
| ㆍ1981.11-1981.12 | Attended International Training Course on Agricultural Application of Plant Tissue Culture held at PhillipineUniversity,Laguna.Phillipines |
