The viscoelastic properties of rice bran protein (RBP) and the effect of temperature and concentration
were investigated using small amplitude dynamic oscillatory shear measurements (SAOS). Linear
viscoelastic region determined at 0.5% strain. Storage modulus (G0) was greater than the loss modulus
(G00) at all concentrations and increased by raising RBP concentration. Yield stress value was determined
by stress sweep and it increased from 0.038 to 1.80 Pa, when concentration increased from 10% to 15%.
Frequency sweep showed that RBP solution had a typical fluid-gel behavior at low frequencies and
complex viscosity (h*) had linear correlation with frequency. Phase angle was remained relatively low
(>10) over the 1e10 Hz frequency range, confirming weak network of RBP. The effect of temperature on
rheological traits was investigated during heating (20e90 C) and cooling (90e20 C) phases. RBP has a
weak network and storage modulus was increased more during cooling phase. These rheological
properties of RBP make it as a good candidate to apply with gelling materials in nutraceutical and food
industries.