1. Graduate research assistant and professor, Dept. of Grain Science and Industry, Kansas State University, Manhattan, KS 66506.
2. Present address: 1545 Food Sciences Bldg., Iowa State Univ., Ames, IA 50011.
3. Corresponding author. Phone: 913/532-6161. Fax: 913/532-7010.
4. Supervisory research chemist and research chemist, USDA-ARS, U.S. Grain Marketing and Production Research Center, Manhattan, KS 66502 and adjunct professors, Kansas State University.