Abstract
Three forms of modified tapioca starch, i.e. phosphorylated cross-linked tapioca starch (CLTS), octenyl succinic anhydride substituted tapioca starch (OSTS) and hydroxypropylated tapioca starch (HPTS) were studied and used as stabilizers (0.5, 1 and 1.5%) in industrial liquid kashk, and their effects on the physicochemical and sensory properties of products were examined during 60days of refrigerated storage. When combined with the highest concentration of each stabilizer, the kashk reached its highest acidity, hardness, adhesiveness, viscosity and overall acceptability, while the lowest value of syneresis was obtained. Moreover, the highest values of viscosity was observed after incorporating CLTS into the samples, and other samples with HPTS showed the highest syneresis, hardness, adhesiveness and overall acceptability. During storage, there were significant trends of increase in the values of acidity, syneresis and hardness, whereas the viscosity, pH and adhesiveness decreased significantly. Several sensory attributes such as texture, odour value and overall acceptability were influenced by the type of stabilizer. In general, among the three kinds of modified tapioca starch, the HPTS was the most suitable form at the concentration of 1.5%, and this was most appropriate for the production of industrial liquid kashk with respect to high-quality physicochemical and sensory properties.
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