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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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| Authors: | Weerapong Woraprayote Yutthana Kingcha Pannawit Amonphanpokin Jittiporn Kruenate Takeshi Zendo Kenji Sonomoto Soottawat Benjakul Wonnop Visessanguan |
| Affiliation: | 1. Department of Food Technology, Faculty of Agro-Industry, Prince of Songkla University, 15 Karnjanavanich Road, Songkhla 90110, Thailand;2. National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand;3. National Metal and Materials Technology Center (MTEC), 114 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand;4. Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka 812-8581, Japan |
| Abstract: | 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 ± 3.07 μg 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. |
| Keywords: | Poly(lactic acid) Sawdust particle Biocomposite film Pediocin Anti-listeria Packaging |
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