1. Graduate research assistant, research associate, and professor, respectively, Dept. Grain Science and Industry, Kansas State University, Manhattan, 66506.
2. Present address: Bunge Foods, 725 North Kinzie Ave., Bradley, IL 60915.
3. Present address: R&R Research Services, Inc., 8831 Quail Lane, Manhattan, KS 66502.
4. Corresponding Author, e-mail: r_and_r@kansas.net