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  • Title: Enhanced oral oil release and mouthfeel perception of starch emulsion gels.
    Author: Hu X, Karthik P, Chen J.
    Journal: Food Res Int; 2021 Jun; 144():110356. PubMed ID: 34053549.
    Abstract:
    Reducing oil/fat content without compromising the structural and sensory quality of food is a great technical challenge to the food industry. The present work aims to investigate the possibility of a novel emulsion design that gives an enhanced oral release of oil/fat from an emulsion gel and therefore an enhanced mouthfeel of oiliness. Hence, alpha-amylase sensitive emulsifier such as starch was used for this purpose. On the other hand, whey protein isolate (WPI) i.e. α-amylase insensitive emulsifier was used as a reference. The gellan gum was selected as a gelling agent to prepare emulsion gels. The mastication and size reduction of the emulsion gels were examined through in-vitro and in-vivo studies. The amount of oil released as indicated by the β-carotene analysis was monitored and various influencing factors (pH, time, compositions, etc.) were also investigated. Using sensory panelists, oral processing of emulsion gels was examined in terms of both mastication parameters and perceptions of oiliness and thickness. The obtained results showed that the use of a starch emulsifier gives a higher oil release and an enhanced oral sensation of oiliness mouthfeel. Therefore, starch emulsion could provide a novel solution in the design of fat-reduced food products with no effect on the mastication parameter, sensation and perception of fat-related attributes.
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