The Combined Effect of UV Irradiation and Ethanol Extract from Torilis japonica Fruit on Inactivation of Bacillus subtilis Spores

Won Il Cho, Chan Ick Cheigh, Myung Sub Chung, Ki Hwan Park, Pahn Shick Chang, Myong Soo Chung

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The purpose of this study was to evaluate the synergistic sporicidal effects of the ethanol extract from Torilis japonica fruit on inactivation of Bacillus subtilis spores induced by UV irradiation at a wavelength of 254nm. UV254 exhibited the strongest inactivation effect, with the level of spores being reduced by approximately 3.6- and 4.7-log cycles, respectively, after 3 and 10min of exposure at an irradiation distance of 15cm. And an ethanol extract of T. japonica fruit at concentration of 1.0% reduced the spore counts by about 3.0-log cycles for 1h of treatment. Furthermore, a combined treatment with UV254 irradiation and 1.0% ethanol extract of the fruit produced 4.2-5.0-log reductions of Bacillus spores at different growth stages for an exposure time of 3min. The energy required from UV irradiation to inactivate the spores was 50% lower in the presence of 1% ethanol extract of the fruit than with UV irradiation alone.

Original languageEnglish
Pages (from-to)474-480
Number of pages7
JournalJournal of Food Safety
Volume32
Issue number4
DOIs
StatePublished - Nov 2012

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