ULTRAVIOLET INACTIVATION AND PHOTOREACTIVATION OF AZOTOBACTER
نویسندگان
چکیده
منابع مشابه
Ultraviolet light inactivation and photoreactivation in the mycobacteria.
The kinetics of inactivation of mycobacteria by ultraviolet light were investigated. Mycobacterium tuberculosis and M. marinum were shown to be capable of photo-reactivation.
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Acetate grown cells of Azotobacter, like sucrose grown cells (Stone and Wilson, 1952), are unadapted to the oxidation of succinic acid although possessing an enzyme system capable of oxidizing succinate. Hence the adaptation of these cells to succinic acid may be termed a functional change in the physiology of the organism. In contrast, glucose grown cells of Saccharomyces cerevisae are unadapt...
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Hemophilus influenzae-transforming DNA, which has been inactivated by ultra-violet radiation, is reactivated by visible light in the presence of a cell-free extract of Escherichia coli B. The time rate of reactivation is increased by increasing the E. coli extract concentration, the temperature, and the intensity of illumination. Only DNA containing an ultraviolet-damaged genetic marker exhibit...
متن کاملExperiments on photoreactivation of bacteriophages inactivated with ultraviolet radiation.
Kelner (1949), working with conidia of Streptomyces griseus, discovered that light belonging to the visible range is capable of reactivating biological material that has been rendered inactive by ultraviolet radiation (WJY). Shortly after Kelner's discovery was known, a similar phenomenon in bacteriophages (bacterial viruses) was observed by accident. Plates of nutrient agar containing UV-inact...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1956
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.72.2.184-188.1956