RECOVERY FROM ULTRAVIOLET IRRADIATION IN ESCHERICHIA COLI
نویسندگان
چکیده
منابع مشابه
Dark - Recovery Processes in Escherichia coli Irradiated with Ultraviolet Light
Mutants of Escherichia coli K-12 unable to excise pyrimidine dimers from their deoxyribonucleic acid (DNA) because of a uvr mutation show a higher survival when plated on a minimal salts medium after exposure to ultraviolet radiation than when plated on a complex medium such as nutrient agar containing yeast extract. This response has been called minimal medium recovery (MMR). Recovery of uvr m...
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Improved plating techniques and a fluctuation test have been used to distinguish between liquid holding recovery of ultraviolet-irradiated cells and cell multiplication in Escherichia coli. Among tested strains, only recA mutants showed true recovery.
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Abstract: Background and objectives: There is a great interest in photocatalytic oxidation of contaminants, using ZnO, in recent years. The main objective of this research was to study photocatalytic disinfection of E. coli bacteria as water microbial pollution index, using nano particles of ZnO and a UV lamp in a batch reactor. Material and Methods: In this study, the contaminated water sample...
متن کاملDark reactivation in ultraviolet irradiated Escherichia coli.
Reversal of the lethal effect of ultraviolet radiation on microorganisms by a variety of treatments has been demonstrated with two essentially different plating techniques. Cells may be plated immediately after irradiation, in which case reactivation occurs on the agar plate. By employing such a plating procedure, reactivation has been accomplished through the use of heat (Anderson, 1951), acet...
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Toluene-treated cells of Escherichia coli represent an in uifro system capable of replicative DNA synthesis. They should offer advantages for investigation of enzymatic mechanisms of DNA repair synthesis secondary to ultraviolet irradiation. The stability of this system allows in vifro irradiation with subsequent measurement of DNA synthesis. Ultraviolet irradiation in vitro causes an inhibitio...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1949
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.57.3.363-375.1949