Abstract
Current work aimed to examine the influence of soaking solution (citric acid, calcium chloride and ascorbic acid) and high hydrostatic pressure (100, 200 and 400 MPa) on gelatinization properties of flour and antioxidant activity alongwith in vitro- digestibility of β-carotene in orange-fleshed sweet potato flour (OSPF) noodles. With the intensity of the HHP application, water absorption capacity increased linearly whereas water swelling capacity decreased in OSPF. Differential scanning calorimetry (DSC) of OSPF indicated a remarkable reduction in peak enthalpy due to gelatinization of starch and denaturation of protein. Hardness and cohesion of OSPF noodles at 400 MPa remarkably decreased whereas springiness increased. Antioxidant capacities of OSPF was gradually increased with the 400 MPa and ascorbic acid-treated OSPF due to the immense contribution of higher contents of TPC. After in vitro digestibility, noodles from OSPF prepared with 400 MPa treated flour exhibited maximum β-carotene retention. Thus, OSPF treated with 400 MPa might be potentially used for the production of noodles with acceptable texture and functional properties.
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