1. Department of Food Science and Technology and Funcitional Food Research Center, Chonnam National University, Gwangju 500-757, Korea
2. Jeonnam Agricultural Research and Extension Services, Naju 520-715, Korea
3. Gyeongnam Agricultural Research and Extension Services, Jinju 660-370, Korea
4. Rural Development Administration, Organic Agricultural Division, Suwon 441-707, Korea
5. Department of Horticulture and Institute of Agricultural Science and Technology, Chonnam National University, Gwangju 500-757, Korea
6. Korea Pear Research Organization, Chonnam National University, Gwangju 500-757, Korea