1. Research Chemist and Biological Science Laboratory Technician, USDA-ARS Hard Red Spring and Durum Wheat Quality Laboratory, North Dakota State University, Fargo, ND 58105. Names are necessary to report factually on available data, however the USDA neither guarantees nor warrants the standard of the product, and the use of the name by the USDA implies no approval of the product to the exclusion of others that may also be suitable.
2. Corresponding author. Email: grantl@fargo.ars.usda.gov. Fax: 701-239-1377.
3. Associate professor, Food & Agricultural Products Research Center, Oklahoma State University, Stillwater, OK 74078-6055.