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- W48717775 abstract "A radioresistant strain of E. coli was obtained from strain M-17 by up to 10 gamma irradiations. Suspensions of 2 x 10/sup 9/ microbes of the original and the radioresistant strain per ml physiological solution were cultured on various media under sterile and nonsterile conditions, keeping them at room temperature in light or in the dark. The media were: sand, earth, water, physiological solution, moleskin, wood, leaves, paper money, oilcloth, and paper. Survival varied from 11 days on paper, oilcloth, and wood to 8 months on earth and sand. While in the sterile tests no significant difference was observed between irradiated and non-irradiated bacteria, the survival was under nonsterile conditions 1-- 1.5 months longer in 8 of 20 alternatives for the irradiated specimens than for the non-irradiated, and only in 2 cases shorter. This is attributed to the reduction of antagonistic properties of the irradiated strain and the natural flora. A difference in biological behavior between the irradiated and the nonirradiated strain was observed only in later periods. E. coli citrovorum was detected in sterile and nonsterile cultures of the radioresistant M-17 strain on water and earth after 4-5 months, but was never observed in the control cultures. Hence, themore » appearance of citratepositive strains of E. coli may be indicative of radioactive contamination. (OTS)« less" @default.
- W48717775 created "2016-06-24" @default.
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- W48717775 date "1963-01-01" @default.
- W48717775 modified "2023-09-26" @default.
- W48717775 title "THE EFFECT OF GAMMA IRRADIATION ON THE SURVIVAL OF BACTERIUM COLI IN AN EXTERNAL ENVIRONMENT" @default.
- W48717775 hasPublicationYear "1963" @default.
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