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Open AccessArticle

Physicochemical and Functional Properties of Active Fish Gelatin-Based Edible Films Added with Aloe Vera Gel

1
Analytical Chemistry, Nutrition & Food Sciences Department, University of Alicante, P.O. Box 99, 03080 Alicante, Spain
2
Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, AlbaNova University Centre, SE-106-91 Stockholm, Sweden
*
Authors to whom correspondence should be addressed.
Foods 2020, 9(9), 1248; https://doi.org/10.3390/foods9091248
Received: 30 July 2020 / Revised: 24 August 2020 / Accepted: 3 September 2020 / Published: 7 September 2020
Edible films based on the addition of Aloe Vera gel (AV) into fish gelatin (FG) with antimicrobial and functional properties for food packaging applications were proposed in this work. AV showed an amphiphilic nature by infrared spectroscopy, high total phenolics content (TPC), antioxidant activity and thermal stability with an initial degradation temperature of 174 ± 2 °C. Mannose and glucose were quantified as main monosaccharides whereas the linkage composition study confirmed the presence of acemannan as main active polysaccharide. Three different formulations were obtained by the casting technique and the addition of AV contents of 0, 1 and 4 wt.% to FG, showing films with 4 wt.% of AV the best performance. The addition of AV did not significantly affect mechanical and barrier properties to oxygen and water vapour. However, some structural changes were observed by infrared spectroscopy and the obtained glass transition temperature values due to intermolecular interactions that increased the hydrophilicity and solubility of the resulting FG/AV films. A higher thermal stability was observed in films with AV content increasing the initial degradation and oxidation onset temperatures. An antimicrobial activity against S. aureus was also observed for FG/AV films. The addition of AV into FG could be proposed as a potential effective material to increase the postharvest quality of packed fruits and vegetables by retarding the microbial growth and extending the shelf-life of these food products. View Full-Text
Keywords: active packaging; edible films; antimicrobial activity; fish gelatin; Aloe Vera active packaging; edible films; antimicrobial activity; fish gelatin; Aloe Vera
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MDPI and ACS Style

Sánchez, J.T.; García, A.V.; Martínez-Abad, A.; Vilaplana, F.; Jiménez, A.; Garrigós, M.C. Physicochemical and Functional Properties of Active Fish Gelatin-Based Edible Films Added with Aloe Vera Gel. Foods 2020, 9, 1248.

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