Hard-to-cook defect in black beans — effect of pretreatment and storage condition on extractable phenols and peroxidase activity

Date

1987-12

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

Pretreatments were studied to assess their effectiveness in controlling the development of the hard-to-cook defect in black beans during storage in conditions that promote hardening. Of the methods tested only irradiation significantly reduced the rate of hardening. Total extractable phenols and in vitro peroxidase activity were measured over the storage period to find if changes in their relative amounts could be related to the rate of bean hardening. Determinations of extractable phenols over storage time showed that they decreased in some samples that showed hardening but this trend was not seen in all of the hardening bean samples nor was it seen exclusively in the hardening bean samples. However, it is apparent that, within each treatment, phenol degradation proceeded more rapidly under high temperature, high humidity conditions. It was concluded that the measurement of total extractable phenols may not have been sufficiently specific to detect changes in the phenol fraction important in either lignification or tannin anabolism. Peroxidase specific activity in beans stored in conditions promoting the hard-to-cook defect increased during the initial storage period but then decreased, either due to inactivation or binding. High levels of extractable peroxidase activity was not related to a greater degree or rate of hardening.

Description

Includes abstract in French

Keywords

FOOD STORAGE, BEANS, FOOD IRRADIATION, FOOD QUALITY, GRAIN STORAGE, FOOD PREPARATION

Citation

Plhak, L.C., Stanley, D.W., Hohlberg, A.I., & Aguilera, J.M. (1987). Hard-to-Cook Defect in Black Beans — Effect of Pretreatment and Storage Condition on Extractable Phenols and Peroxidase Activity. Canadian Institute of Food Science and Technology Journal, 20(5), 378-382. doi:10.1016/S0315-5463(87)71335-2

URI

http://hdl.handle.net/10625/52973

DOI

Collections

IDRC Research Results / Résultats de recherches du CRDI
1980s / Années 1980
Agriculture, Food and Nutrition Sciences Division / Division des sciences de l'agriculture, de l'alimentation et de la nutrition