1. Drs. de Mejia and Hasler are with the Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, 228 ERML, M/C 051, 11201 W. Gregory Drive, Urbana, IL 61801, USA.
2. Miss Bradford is with Grambling State University, Grambling, Louisiana, Home Economics Department, P.O. Box 1190, LA 71245, USA.