1. Chemical Safety Division; National Academy of Agricultural Science; Rural Development Administration; Suwon 441-707 Korea
2. Advanced Radiation Technology Institute (ARTI); Korea Atomic Energy Research Institute (KAERI); Jeongeup Korea
3. Plant Quarantine Service; Animal, Plant and Fisheries Quarantine and Inspection Agency; Anyang Korea
4. Department of Bio Environmental Chemistry; Chonbuk National University; Jeonju 561-756 Korea