Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Improving the Microbial Safety of Fresh-Cut Endive with a Combined Treatment of Cinnamon Leaf Oil Emulsion Containing Cationic Surfactants and Ultrasound

  • Park, Jun-Beom (Department of Food Science and Technology, Chungnam National University) ;
  • Kang, Ji-Hoon (Department of Food Science and Technology, Chungnam National University) ;
  • Song, Kyung Bin (Department of Food Science and Technology, Chungnam National University)
  • Received : 2017.11.08
  • Accepted : 2018.01.19
  • Published : 2018.04.28
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Abstract

Endive is widely consumed in a fresh-cut form owing to its rich nutritional content. However, fresh-cut vegetables are susceptible to contamination by pathogenic bacteria. This study investigated the antibacterial activities of the combined treatment of cinnamon leaf oil emulsion containing cetylpyridinium chloride or benzalkonium chloride (CLC and CLB, respectively) as a cationic surfactant and ultrasound (US) against Listeria monocytogenes and Escherichia coli O157:H7 on endive. The combined treatment of CLC or CLB with US reduced the population of L. monocytogenes by 1.58 and 1.47 log colony forming units (CFU)/g, respectively, and that of E. coli O157:H7 by 1.60 and 1.46 log CFU/g, respectively, as compared with water washing treatment. The reduction levels of both pathogens were higher than those observed with 0.2 mg/ml sodium hypochlorite. In addition, the combined treatment showed no effect on the quality of the fresh-cut endive (FCE). In particular, the degree of browning in FCE was less for the treatment group than for the control and water washing treatment groups. Thus, cationic surfactant-based cinnamon leaf oil emulsions combined with US may be an effective washing treatment for the microbial safety of FCE.

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References

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