Abstract
In this study, Indigofera tinctoria extract (ITLE) along with maltodextrin in different concentrations was encapsulated using a freeze dryer, and some physicochemical properties were measured. Powder containing 30% maltodextrin was selected as the optimal powder for use in ice-cream production in four levels (0%-1.8%), and some quality parameters were examined. The results showed that with increasing the carrier concentration, moisture content, aw, solubility, a*, and b* of the powders decreased; bulk density, tapped density, and L* did not change significantly; total phenolic content and antioxidant activity of powders also increased significantly (p < .05). Addition of encapsulated ITLE to the ice cream caused a significant decrease in L*, b*, and melting rate, a significant increase in a*, overrun, and hardness of the samples and no change in the viscosity of the ice-cream mix (p < .05). Ice cream containing 1.2% encapsulated ITLE had higher sensory acceptance than other levels following control ice cream. The results of this study showed that ITLE can be used as a desirable additive in the production as a natural antioxidant and color agent.
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