Measurement of Hardening and Softening Properties of Soybean Protein-water Suspendion System

Abstract

A device was described for measuring the hardening and softening properties of soybean protein-water suspendion systems. The device was fitted to a coaxial cylinder viscometer with temperature and shear rate controllers and some interface to a computer. The viscometer was designed to operate with a small quantity of sample and gain high accuracy. A hybrid controlprogram was established; (i)Cyclic temperature test(20→90→20°C)under the constant rate of shear, where viscosity at actual temperature was measured in a laminar flow, and (ii)Cyclic shearing test(48.7→243.7→48.7 sec^-1)under isothermal conditions, before and after the heat