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Antimicrobial effect of a combination of herb extract and organic acid against Bacillus subtilis spores

Title
Antimicrobial effect of a combination of herb extract and organic acid against Bacillus subtilis spores
Authors
Cho W.-I.Chung M.-S.
Ewha Authors
정명수
SCOPUS Author ID
정명수scopus
Issue Date
2017
Journal Title
Food Science and Biotechnology
ISSN
1226-7708JCR Link
Citation
vol. 26, no. 5, pp. 1423 - 1428
Keywords
Bacillus subtilis sporeCorianderHerbsOrganic acidSporicidal activity
Publisher
The Korean Society of Food Science and Technology
Indexed
SCIE; SCOPUS; KCI WOS scopus
Abstract
The sporicidal activities of the herbs were investigated to screen for novel antimicrobial substances against Bacillus subtilis spores. The bacterial inactivation effects of ethanol extracts of coriander, caraway, mace at concentrations of 0.5% (w/v) and 1.0–2.5% were about 10- and 100-fold respectively against spores. At pH 5, the antimicrobial activity was about 92%, but at pH 4 the sporicidal activity was particularly high, reducing the spore count by 99.99%. The 0.1–2.5% ethanol extract of herbs adjusted to pH 4–5 exhibited significantly marked deactivation effects, with 3–4 log CFU/mL reductions. The herb–acid combination exerted a further increase in sporicidal activity, with an additional 1–3 log CFU/mL reduction. The sporicidal mechanism was assumed to involve a two-step: (1) the hydrophobic binding of surfactants in the herbs onto the spore coat destroys its protein, and (2) the acid then penetrates into the interior, generating unstable growth conditions. © 2017, The Korean Society of Food Science and Technology and Springer Science+Business Media B.V.
DOI
10.1007/s10068-017-0164-5
Appears in Collections:
엘텍공과대학 > 식품공학전공 > Journal papers
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