三种选定细菌对臭氧的敏感性。
Sensitivity of three selected bacterial species to ozone.
作者信息
Broadwater W T, Hoehn R C, King P H
出版信息
Appl Microbiol. 1973 Sep;26(3):391-3. doi: 10.1128/am.26.3.391-393.1973.
Abstract
THE MINIMAL LETHAL CONCENTRATION OF OZONE IN WATER WAS DETERMINED FOR THREE BACTERIAL SPECIES
Escherichia coli, Bacillus cereus, and Bacillus megaterium. A contact period of 5 min was selected. The lethal threshold concentration for the cells of B. cereus was 0.12 mg/liter while that for E. coli and B. megaterium was 0.19 mg/liter. Low concentrations of ozone were ineffective when organic matter was present to interfere with the action of ozone on the bacterial cells. Also determined during the study was the sensitivity of spores of B. cereus and B. megaterium to ozone in water. The threshold concentration required to kill the spores of both species was 2.29 mg/liter. The cells and spores of these organisms exhibited the "all-or-none" die-away phenomenon normally associated with ozone treatment.
摘要
测定了三种细菌——大肠杆菌、蜡样芽孢杆菌和巨大芽孢杆菌在水中的最低致死浓度。选择了5分钟的接触时间。蜡样芽孢杆菌细胞的致死阈值浓度为0.12毫克/升，而大肠杆菌和巨大芽孢杆菌的致死阈值浓度为0.19毫克/升。当存在有机物干扰臭氧对细菌细胞的作用时，低浓度的臭氧无效。在该研究中还测定了蜡样芽孢杆菌和巨大芽孢杆菌的孢子对水中臭氧的敏感性。杀死这两种细菌孢子所需的阈值浓度为2.29毫克/升。这些微生物的细胞和孢子表现出通常与臭氧处理相关的“全或无”死亡现象。
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