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저널 이름 Food Chemistry (346: article number 128883)
연도 2021 June (IF=6.306)
저자 Inyoung Choi, Da Som Yoo, Yoonjee Chang, So Yeon Kim* and Jaejoon Han*

Title: Polycaprolactone film functionalized with bacteriophage T4 promotes antibacterial activity of food packaging toward Escherichia coli
Food Chemistry


Abstract 

Bacteriophages (phages) have been extensively utilized as antibacterial agents in the food industry because of their host-specific lytic ability. However, their application in polymer films has been limited because of the lack of a strong attachment method for bacteriophage to the surface. Here, we developed an antibacterial film by covalently immobilizing Escherichia coli (E. coli)-specific phage T4 on a polycaprolactone (PCL) film, a food packaging polymer. The chemical bond formation was confirmed by XPS analysis, and the covalent attachment of phage T4 effectively inhibited E. coli growth even after external stimulation of the film by sonication. When applied as a packaging film for raw beef samples inoculated with E. coli O157:H7, the chemically functionalized PCL film showed approximately 30-fold higher bacterial inhibitory effects than the film with physically adsorbed phage T4. These results indicate the promising application potential of chemically functionalized PCL film with phage T4 as an antibacterial food packaging material against the foodborne pathogen E. coli.




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