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Effect of cellulose nanofiber-based coating with chitosan and trans-cinnamaldehyde on the microbiological safety and quality of cantaloupe rind and fresh-cut pulp. Part 1: Microbial safety

文献类型： 外文期刊

作者： Zhang, Jin 1 ; Ozturk, Samet 2 ; Singh, Rakesh K. 2 ; Kong, Fanbin 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Food Sci, Hangzhou 310021, Zhejiang, Peoples R China

2.Univ Georgia, Dept Food Sci & Technol, 100 Cedar St, Athens, GA 30602 USA

3.Gumushane Univ, Gumushane, Turkey

关键词： Cellulose nanofiber; Coating; Cantaloupe; Foodborne pathogens; Chitosan; Trans-cinnamaldehyde

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：4.952； 五年影响因子：5.383 ）

ISSN： 0023-6438

年卷期： 2020 年 134 卷

页码：

收录情况： SCI

摘要： This study aimed to evaluate the effect of cellulose nanofiber (CNF)-based coating containing chitosan (CHI) and trans-cinnamaldehyde (TC) on microbial growth of foodborne pathogens and spoilage microorganisms on cantaloupe rind and fresh-cut pulp. Coated/uncoated cantaloupe rind and pulp samples were inoculated with Salmonella enterica, Escherichia coli O157:H7 and Listeria monocytogenes and subsequently subjected to storage for 20 d at 4 degrees C or 12 d at 22 degrees C. Results showed that coating with only CNF (0.5%, dry-base) was effective in the elimination of S. enterica and E. coli O157:H7. Adding CHI (1%, w/w) and TC (1%, w/w) into CNF-based coating enhanced film formation on the surface and increased the antimicrobial activity on rind sample, but the reduction effect was less significant on pulp samples. The CNF (0.5%, dry-base) +CHI (1%, w/w) +TC (1%, w/w) coating resulted in 2.23, 2.43 and 3.22 log(10) CFU/cm(3) reduction of S. enterica, E. coli O157:H7 and L. monocytogenes, respectively, on pulp samples after 20 d at 4 degrees C. The formulation also significantly inhibited the growth of natural spoilage microorganisms, and no growth was observed up to 18 d at 4 degrees C. Results indicated that CNF-based coating significantly improved microbial safety of cantaloupe rind and fresh-cut pulp during storage by forming a physical barrier reducing activities of oxygen-dependent microorganisms.

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