1. Laboratory of Food Chemistry, Katholieke Universiteit Leaven, Kardinaal Mercierlaan 92, B-3001 Heverlee, Belgium.
2. Research associate and professor, Department of Grain Science and Industry, Kansas State University, Manhattan KS 66506.
3. Present address: American Institute of Baking, 1213 Bakers Way, Manhattan, KS 66502.
4. Present address: R & R Research Services, Inc., 8831 Quail Lane, Manhattan, KS 66502.
5. Corresponding author. E-mail: r_and_r@kansas.net