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Salama, Hend E.; Abdel Aziz, Mohamed S.
Food science & technology, June 2021, 2021-06-00, Volume: 145Journal Article
The application of alginate-based coatings in food preservation is limited owing to their poor antimicrobial, UV-shielding, and water-barrier properties. For this concern, multifunctional alginate films were designed for the preservation of green capsicums through the incorporation of aloe vera (AV) and frankincense oil (FO). FTIR confirmed the successful incorporation of AV and FO while XRD showed a crystallinity reduction in the presence of FO. Significant improvements in thermal stability and mechanical properties were achieved in the presence of AV and FO. The addition of AV and FO made the films more bright, yellow and green meanwhile the film's transparency was not significantly influenced. A significant UV-shielding was detected upon increasing either AV or FO. Water vapor permeability was significantly reduced from 21.53 ± 1.43 g mm/m2 day kPa for alginate to 8.18 ± 0.24 g mm/m2 day kPa for the film containing AV at 67% and FO at 6%. Excellent inhibition activities against different bacteria and fungi were obtained for the films containing AV and FO. The prepared films exhibited excellent senescence retardation and resistance to the mass loss for green capsicums. Due to their enhanced UV-barrier, physical and microbial-inhibition properties, the prepared active films might be potentially used in food preservation. •Aloe vera (AV) and frankincense oil (FO) were incorporated into alginate edible coating.•AV and FO improved UV-shielding, physical and antimicrobial properties.•Both FO and AV didn't significantly affect the film's transparency.•The prepared coating retarded senescence of green capsicums.•The prepared coating might used potentially in food packaging industries.
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