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Title 

Sensory and microbiological qualities of romaine lettuce and kale affected by a combined treatment of aqueous chlorine dioxide and ultraviolet-C

Authors 

J H LeeH H ChunD H OhJ ParkMi Sun WonK B Song

Publisher 

Korean Society for Horticultural Science

Issue Date 

2012

Citation 

Horticulture, Environment, and Biotechnology, vol. 53, no. 5, pp. 387-396

Keywords 

foodborne pathogensmicrobial safetynon-thermal treatmentshelf-lifestorage

Abstract 

The effects of a combined treatment of aqueous chlorine dioxide (ClO 2) and ultraviolet-C (UV-C) on the sensory and microbiological qualities of Romaine lettuce and kale were examined. Samples of Romaine lettuce and kale were artificially inoculated with Escherichia coli O157:H7 and Salmonella enterica serotype Typhimurium. The inoculated Romaine lettuce and kale, as well as fresh samples, were treated with 50 L L -1 aqueous ClO 2, 10 kJ m -2 UV-C, and a combination of aqueous ClO 2 and UV-C, and stored at 4 for 7 days. The combined treatment of aqueous ClO 2 and UV-C reduced the initial populations of total aerobic bacteria in the Romaine lettuce and kale by 2. 07 and 2. 49 log CFU/g, compared to 6. 36 and 6. 07 log CFU/g for the control, respectively. The combined treatment also reduced the populations of yeast and mold in the samples by 1. 85 and 4. 25 log CFU/g, respectively. In particular, E. coli O157:H7 and S. Typhimurium inoculated in the Romaine lettuce and kale were eliminated by the combined treatment. The Hunter 'L', 'a', and 'b' values of Romaine lettuce and kale were not significantly different among the treatments. Sensory evaluation results indicated that the combined treatment provided better scores than did the control. Our results suggest that the combined treatment of 50 L L -1 aqueous ClO 2 with 10 kJ m -2 UV-C can be useful for maintaining the microbial safety and sensory qualities of Romaine lettuce and kale.

Citation 

ISSN 

0253-6498

Link 

http://dx.doi.org/10.1007/s13580-012-0013-7

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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