Department of Food Science and Technology, Department of Biological and Agri-
cultural Engineering, University of California, Davis, California 956 16, USA
ikal E. Saltveit
Department of Vegetables Crops, University of California, Davis, California 956 16,
USA
odrigo de Jestis egas & 30~6 Antonio Sauceda-Erez
Instituto Tecnol6gico de Culiacain, Culiacin, Sinaloa, Mixico
(Received 5 August 1992; revised version received 3 October 1992;
accepted 5 October 1992)