Effect of environmental water activity on microbial inactivation by intense pulsed light (IPL)
- 주제(키워드) bacteria , Intense pulsed light , Resistance , Water activity , Yeast
- 등재 SCIE, SCOPUS, KCI등재
- 발행기관 The Korean Society of Food Science and Technology
- 발행년도 2024
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000213490
- 본문언어 영어
- Published As https://doi.org/10.1007/s10068-023-01395-x
초록/요약
In this study, the effect of environmental aw on microbial inactivation by intense pulsed light (IPL) was investigated. Three different microorganisms (Gram-positive bacteria, Gram-negative bacteria, and yeast) were used as test organisms. The effect of environmental aw was assessed by irradiating each microbial suspension in sodium chloride solutions with different environmental aw levels (0.99–0.80). As the aw decreased, the aggregation of intracellular material of cell interior was changed and the cell number was increased. However, there was no significant difference in microbial reduction according to the aw after the 0.23–3.05 J/cm2 of IPL treatment. It was confirmed that yeast had the highest resistance to IPL because of the differences in cell structure and cell wall components between yeast and bacteria. Additional research is needed to clearly understand the inactivation mechanism according to the type of microorganism by controlling aw using various solutes. © 2023, The Korean Society of Food Science and Technology.
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