1. Department of Food Service Industry, Uiduk University, Gangdong, Gyeongju, Gyongbuk, Korea 780-713; Department of Food Service Industry, Seowon University, Heungdeok, Cheongju, Korea 361-742; Mass Analysis Laboratory, National Food Research Institute, Tsukuba, Japan 305-8642; and Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Albany, California 94710