Titre :
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The response of Escherichia coli K12 upon exposure to hypochlorous acid and hydrogen peroxide
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Auteurs :
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B. Pietersen ;
V. Brozel ;
T. Cloete
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Type de document :
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article/chapitre/communication
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Année de publication :
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1996
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Format :
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p. 43-48
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Langues:
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= Anglais
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Catégories :
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Biologie
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Mots-clés:
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ACTIVITE BACTERIENNE
;
BACTERICIDE
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Résumé :
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The aim of the work reported here was to investigate the growth-inhibitory activity of HOCl and HO toward Escherichia coli K 12 during both logarithmic and stationary phases of the growth cycle, as well as the response of E. coli K12 to these oxidants. Stationary phase cultures were exposed to sub-inhibitory oxidising stress, and the minimum inhibitory concentrations (MIC) were determined during the ensuing 24 h. The effect of oxidant on logarithmically growing cultures was also determined. Stationary phase cultures of E. coli K12 responded to HO stress, both the MIC and survival following exposure to high concentrations increasing following exposure to stress. By contrast stationary phase cells did not become more tolerant of high concentrations of HOCl following HOCl stress. Logarithmically growing E. coli K12 did not display increased tolerance to either inhibitory or lethal concentrations of HO or HOCl following the relevant oxidising stress.
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Source :
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Water SA, vol.22, n°1
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