1. Department of Food Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1; Food Science Research Institute, Tsukuba Research and Development Center, Fuji Oil Company, Ltd., 4-3 Kinunodai, Yawara-mura, Tsukuba-gun, Ibaraki 300-2497, Japan; and Specialty and Functional Food Ingredients Development Section, Fuji Oil Company, Ltd., 1 Sumiyoshi-cyo, Izumisano, Osaka 598-0061, Japan