Journal
POSTHARVEST BIOLOGY AND TECHNOLOGY
Volume 118, Issue -, Pages 134-140Publisher
ELSEVIER
DOI: 10.1016/j.postharvbio.2016.04.005
Keywords
Antimicrobial coating; Gamma radiation; Ozone; Negative air ionization; Listeria; E. coli
Categories
Funding
- National Sciences and Engineering Research Council of Canada (NSERC)
- International Atomic Energy Agency (IAEA)
- Bonduelle North America
- Ecovie (Boucherville, QC, Canada)
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The objective of this study was to evaluate the effect of a bioactive edible coating combined with a low gamma-radiation dose or negative air ionization (NAI) with ozone on the microbiological quality of ready-to eat cauliflowers. Results showed that each treatment alone was effective on Listeria innocua, Escherichia coli and mesophilic bacteria. After 7 d, treatment with gamma-radiation reduced L. innocua and E. coli of 1.8 and 3.6 log CFU g 1 respectively while NAI + ozone reduced L innocua and E. coli of 2.0 and 2.8 log CFU g (1) respectively. Mesophilic bacteria were reduced of 1.8 log CFU g (1) after gamma-radiation and 1.4 log CFU g (1) after NAI + ozone. This study demonstrated that the bioactive coating acts in synergy with gamma-radiation, inducing no bacterial growth of L. innocua and E. coli, as well as a control of the growth of mesophilic bacteria during 7 d. The combination of bioactive coating and NAI + ozone induced an additive effect on L. innocua, E. coli and mesophilic bacteria, and suggests potential antioxidant properties of the coating. (C) 2016 Elsevier B.V. All rights reserved.
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