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  • Title: Development and characterization of edible films based on modified corn starch and grape juice.
    Author: Yıldırım-Yalçın M, Şeker M, Sadıkoğlu H.
    Journal: Food Chem; 2019 Sep 15; 292():6-13. PubMed ID: 31054693.
    Abstract:
    Chemically modified corn starch with sodium trimetaphosphate (STMP) or citric acid (CA) and grape juice was used to produce edible films. Modification reactions were discussed by results of FT-IR scan, water solubility, swelling power, viscosity and degree of cross-linking properties. Mechanical, barrier, physical (solubility, color, transparency, microstructure) and glass transition temperature properties of films were studied to understand the effects of grape juice and modified starch usage in films. Usage of starch cross-linked with STMP decreased significantly oxygen permeability from 5.82 to 2.51 cm3 µm m-2 d-1 kPa-1, water vapor permeability from 1.89 to 1.38 g mm m-2 h-1 kPa-1, solubility from 0.65 to 0.55 g soluble solid/total solid, percent elongation from 62.96 to 16.47. The chemical reaction between starch and CA affected barrier, solubility and elongation properties of films and values were higher than values of STMP films.
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