Effect of high-pressure processing on moisture sorption properties of brown rice

Abstract

The effect of high-pressure treatment (0.1 to 500 MPa for 10 min) on the moisture sorption properties of brown rice (Feng Liang You Xiang No. 1) was investigated. Air was maintained at selected conditions (temperature between 20°C and 40°C, equilibrium relative humidity between 11% and 75%) and equilibrium moisture content was measured. The control attained a higher equilibrium moisture content than treated samples, while the 300 MPa treated sample had the lowest. The area of hysteresis of the 300 MPa test sample was the largest and the BET model was applied to determine the monolayer moisture content.