Effect of Calcium Chloride and Acid Condition on free GABA content and Pasting Properties of Germinated Brown R

Abstract

The effect of calciumchloride and acid condition on free GABA content and pasting properties of germinated brown rice (Oryza sativa L. cv. PCRC92001-432) was determined. The experimental design in CRD was conducted by using 8 soaking solutions consisted of different concentrations of 0, 0.5 and 1.0 mM of calcium chloride at pH 3 and 5 controlled by citrate buffer designated as; P3 (citrate buffer pH 3), P5 (citrate buffer pH 5), C5 (0.5 mM CaCl₂), C1 (1.0 mM CaCl₂)_, C5/P3 (0.5 mM CaCl₂, pH 3), C5/P5 (0.5 mM CaCl₂, pH 5), C1/P3 (1.0 mM CaCl₂ ,pH 3 and  C1/P5 (1.0 mM CaCl₂, pH 5). The non germinated brown rice was served as control. The result showed that moisture content ranged from 6.60-7.15%. The highest free GABA content 120.79 mg/100 g of germinated brown rice produced from brown rice soaked in C1/P5 and were higher than those from soaked in calcium chloride and citrate buffer only. Then, soaking in 8 solution peak viscosity and set back from trough decrease while reducing sugar increase.