Preservation mechanism of chitosan/gelatin films modified by deep eutectic solvent on chilled chicken breast at 4 °C storage

文献类型： 外文期刊

第一作者： Tang, Daobang

作者： Tang, Daobang;Wen, Haitao;Xu, Zhijie;Zou, Jinhao;Liu, Xueming;Wang, Xuping;Zhang, Dequan;Wang, Xuping

作者机构：

关键词： Chitosan/gelatin film; Deep eutectic solvent; Chicken breast; Antibacterial mechanism; Preservation

期刊名称：FOOD CONTROL （ 影响因子：6.3； 五年影响因子：6.1 ）

ISSN： 0956-7135

年卷期： 2025 年 174 卷

页码：

收录情况： SCI

摘要： Previous study indicated that chitosan/gelatin-deep eutectic solvent (CS/GEL-DES) film had highly water barrier and antimicrobial properties, but its application effectiveness on food and antibacterial mechanism have not known. This study aimed to evaluate the preservation effect of CS/GEL-DES film on the chicken breast and reveal the antibacterial mechanism. The chicken breast meat packed with CS/GEL-DES, CS/GEL, regular plastic and without films, respectively, were carried out to confirm the preservation effect of films. Results indicated that CS/GEL-DES film package exhibited significantly extending the shelf life of chicken breast stored at 4 degrees C for approximately 4 days in compared to without package group. And, the effective antibacterial ingredient of CS/ GEL-DES film was DES. Furthermore, the antibacterial mechanism of DES on spoilage dominant bacteria of Pseudomonas fluorescens (P. fluorescens) and Listeria monocytogenes (L. monocytogenes) was investigated. The minimum bactericidal concentration (MBC)/Maximum inhibitory concentration (MIC) values of DES on two bacteria were >4, demonstrated that DES behaved bactericidal effect. Additionally, the bactericidal mechanism against P. fluorescens and L. monocytogenes were that DES damaged the cell wall and disrupted the cell membrane, leading to AKP, ATP, protein and nucleic acid leaking out from bacterial cell and then killed the cell confirmed by chemical testing and microscopes observation. Moreover, the bactericidal effect of DES on L. monocytogenes (Gram-positive bacteria) stronger than that on P. fluorescens (Gram-negative bacteria). These findings indicating that CS/GEL-DES film can serve as a promising biodegradable active packaging material for preservation of fresh meat.

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