1. EMBRAPA - Food Technology, Av. das Americas 29501 CEP: 23020-470, Rio de Janeiro, Brazil.
2. Aberdeen Research and Extension Center, University of Idaho, Aberdeen, ID 83210.
3. Department of Food Science and Toxicology, University of Idaho, P.O Box 441053, Moscow, ID 83844.
4. Corresponding author. Phone 208-885-4661. Fax: 208-885-2567. E-mail: huberk@uidaho.edu.