1. Department of Biological and Agricultural Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, U.S.A.
2. Processed Foods Research Unit, USDA-ARS Western Regional Research Center, 800 Buchanan St., Albany, CA 94710, U.S.A.
3. Corresponding author. Phone: (510) 559-5861. Fax: (510) 559-5851. E-mail: zhongli.pan@ars.usda.gov or zlpan@ucdavis.edu