Effect of pre-gelatinised high-amylose maize starch combined with Ca~(2+) -induced setting of alginate on the physicochemical and sensory properties of rice flour noodles

摘要

This study explored the effect of pre-gelatinised high-amylose maize starch combined with Ca~(2+)-induced setting of alginate on the physicochemical and sensory properties of rice flour noodles. Rice flour noodles were prepared by partially substituting rice flour with pre-gelatinised high-amylose maize starch in ratios of 5, 10 and 15% (wt/wt), combined with sodium alginate at 1% (wt/wt). The noodles were then immersed in a calcium chloride solution to set the alginate. Results indicated that the hydrocolloids significantly (P ＜ 0.05) increased noodle tensile strength, hardness, water absorption and optimum cooking time while cooking loss was significantly (P ＜ 0.05) reduced. SEM micrographs showed a denser, compact noodle structure with an increase in the matrix's continuity as a result of hydrocolloids addition. Formulated noodles also scored above average (5.91) sensory acceptability on the 7 points hedonic scale. Overall, results proved promising for the preparation of rice flour noodles with enhanced properties.