Combined antimicrobial effect of high pressure processing and ethyl lauroyl arginate (LAE)-containing films and its application in coconut water preservation

• Published in: Food control 2024-01, Vol.155, p.110039, Article 110039
• Main Authors: Li, Ting, Chen, Junyu, Duan, Xiaorong, Wu, Xiaomeng, Liao, Xiaojun
• Format: Article
• Language: English
• Subjects: Antimicrobial films; Coconut water; Ethyl lauroyl arginate; High pressure processing
• ISSN: 0956-7135; 1873-7129
• DOI: 10.1016/j.foodcont.2023.110039

The combined effect of high pressure processing (HPP) and antimicrobial film enriched with ethyl lauroyl arginate (LAE) was investigated. More than 5 log10 CFU/mL reduction of Staphylococcus aureus and Escherichia coli O157:H7 were achieved at 300 MPa HPP combined with 2.0% LAE-PLA film. HPP combined with LAE-PLA film showed a synergistic inactivation against S. aureus, probably because it severely damaged the cell membrane and eliminated pressure-induced sublethal injuries of S. aureus. However, no synergistic effect between HPP and LAE-PLA film was found on E. coli O157:H7. Furthermore, coconut water under 300 MPa HPP with 2.0% LAE-PLA treatment showed a longer shelf life than that of 500 MPa HPP alone. These results indicated that antimicrobial films could serve as a promising hurdle technology to lower the processing intensity of HPP while maintaining safety. •HPP and LAE-PLA film led to >5 log10 CFU/mL reduction of S. aureus and E. coli O157:H7.•The combined treatment showed synergistic inactivation against S. aureus.•Using LAE-PLA film, coconut water achieved longer shelf life with lower HPP intensity.