1. National Agricultural Research Center for Tohoku Region, Fukushima 960-2156, Japan; Food and Biodynamic Chemistry Laboratory, Graduate School of Life Science and Agriculture, Tohoku University, Sendai 981-8555, Japan; Fukushima Technology Center, Aizuwakamatsu Technical Support Center, Aizuwakamatsu 965-0006, Japan; and National Food Research Institute, Tsukuba 305-8642, Japan