1. Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan, National Agricultural Research Center for the Tohoku Region, Fukushima 960-2156, Japan, Department of Food Management, School of Food, Agricultural and Environmental Sciences, Miyagi University, Sendai 982-0215, Japan, and Department of Medicine, Nippon Medical School, Tokyo 113-8603, Japan