1. Dept. of Food, Bioprocessing and Nutrition Sciences; North Carolina State Univ; 400 Dan Allen Drive Raleigh NC 27695-7624 U.S.A
2. USDA-ARS, SAA Food Science Research Unit, 322 Schaub Hall, Box 7624; North Carolina State Univ; Raleigh NC 27695-7624 U.S.A
3. Statistics Dept; North Carolina State Univ; SAS Hall 5238, Box 8203 Raleigh NC 27695 U.S.A