1. Graduate student, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011.
2. Assistant professor, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011.
3. Corresponding author. Phone: (515) 294-8681. Fax: (515) 294-8181. E-mail: lamsal@iastate.edu