The Effect of the DBD Cold Plasma Process on the Physicochemical, Mechanical, and Microbial Properties of the Biodegradable Packaging Film (Based on Gelatin-Sodium Alginate) Incorporated with AgNPs to Extend the Shelf Life of Trout Fish in the Refrigerator
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引用次数: 0
Abstract
This investigation aimed to develop a novel biodegradable packaging film based on gelatin (G) and sodium alginate (SA) biopolymers containing silver nanoparticles (AgNPs) using the solvent casting method, assess the physicochemical, mechanical, and antimicrobial features, and evaluate the efficacy of the films in food packaging consumption. Film properties were slightly affected by AgNP concentration levels. As the concentration of AgNPs was increased, water vapor permeability (WVP), water solubility, transparency, and tensile strength (TS) of GSA-AgNPs films were significantly reduced by an average of 42%, 59%, 56%, and 76%, respectively (p < 0.05). Additionally, the impacts of Hurdle technology on GSA (control) and GSA-AgNPs (optimal) films were investigated using dielectric barrier discharge (DBD) cold plasma technology. Scanning electron microscopy (SEM) revealed that cold plasma-treated GSA-AgNPs films had compact surface structures, excellent structural integrity, good barrier qualities, and potential antibacterial activity (Escherichia coli O157:H7 and Salmonella Typhimurium) as a result of DBD cold plasma treatment. The packaged samples with cold plasma-treated optimal films were lower in thiobarbituric acid (0.54 mg MDA/kg sample), total volatile nitrogen (19.04 mg/100 g), and total mesophilic bacteria count (5.8 log CFU/g) compared to other samples. Tests on fish fillets have indicated that cold plasma-treated films containing 20 ppm (0.002%) AgNPs are considered the most effective antimicrobial food packaging.
期刊介绍:
Food and Bioprocess Technology provides an effective and timely platform for cutting-edge high quality original papers in the engineering and science of all types of food processing technologies, from the original food supply source to the consumer’s dinner table. It aims to be a leading international journal for the multidisciplinary agri-food research community.
The journal focuses especially on experimental or theoretical research findings that have the potential for helping the agri-food industry to improve process efficiency, enhance product quality and, extend shelf-life of fresh and processed agri-food products. The editors present critical reviews on new perspectives to established processes, innovative and emerging technologies, and trends and future research in food and bioproducts processing. The journal also publishes short communications for rapidly disseminating preliminary results, letters to the Editor on recent developments and controversy, and book reviews.