EFFECT OF PILOT-PLANT PROCESS VARIABLES O N SOYA ISOLATE PROPERTIES

The influence of temperature (T), pH and concentration (C) on viscosit y and hydration properties of soy isolates obtained at pilot plant sca le was studied. Isolates were evaluated through viscosity, coefficient m, water and sodium chloride solubility and water absorption. It was observed that only the viscosity was affected by the three variables. All polynomial coefficients were significant at the 5 or 1% level, exc ept those of T-2 and pHxT; the higher incidence corresponded to the Tx C interaction. For the other responses only the linear coefficient of T and the independent terms were significant. Sol(H2O), and Sol(NaCl) decreasing with T while the coefficient m and absorption (AA(5') and A A(max) increased. Ah isolate reograms followed the power law with a go od correlation existing between viscosity and behaviour index (n).