Anti-listeria activity of poly(lactic acid)/sawdust particle biocomposite film impregnated with pediocin PA-1/AcH and its use in raw sliced pork

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• 作者：Weerapong Woraprayote ; Yutthana Kingcha ; Pannawit Amonphanpokin ; Jittiporn Kruenate ; Takeshi Zendo ; Kenji Sonomoto ; Soottawat Benjakul ; Wonnop Visessanguan
• 关键词：Poly(lactic acid) ; Sawdust particle ; Biocomposite film ; Pediocin ; Anti-listeria ; Packaging
• 刊名：International Journal of Food Microbiology
• 出版年：15 October, 2013
• 年：2013
• 卷：167
• 期：2
• 页码：229-235
• 全文大小：438 K

文摘

A novel poly(lactic acid) (PLA)/sawdust particle (SP) biocomposite film with anti-listeria activity was developed by incorporation of pediocin PA-1/AcH (Ped) using diffusion coating method. Sawdust particle played an important role in embedding pediocin into the hydrophobic PLA film. The anti-listeria activity of the PLA/SP biocomposite film incorporated with Ped (PLA/SP + Ped) was detected, while no activity against the tested pathogen was observed for the control PLA films (without SP and/or Ped). Dry-heat treatment of film before coating with Ped resulted in the highest Ped adsorption (11.63 卤 3.07 渭g protein/cm²) and the highest anti-listeria activity. A model study of PLA/SP + Ped as a food-contact antimicrobial packaging on raw sliced pork suggests a potential inhibition of Listeria monocytogenes (99% of total listerial population) on raw sliced pork during the chilled storage. This study supports the feasibility of using PLA/SP + Ped film to reduce the initial load of L. monocytogenes on the surface of raw pork.