1. Citrus and Subtropical Products Laboratory, South Atlantic Area, Agricultural Research Service, United States Department of Agriculture, 600 Avenue S, Northwest, Winter Haven, Florida 33881, Department of Food Technology, Siam University, 235 Petchkasem Road, Phasi-charoen, Bangkok 10160, Thailand, and Department of Food Science and Human Nutrition, University of Florida, Gainesville, Florida 32611-0370