1. Division of Food Function Research, Korea Food Research Institute, 46-1 Baekhyun-Dong, Bundang-Gu, Songnam-Si, Kyunggi-Do 463-746, Republic of Korea, and Department of Food Science and Technology, Chung-Ang University, 72-1 Nae-Ri, Daedeok-Myeon, Anseong-Si, Kyunggi-Do 456-756, Korea