Isolation of radioresistant vegetative bacteria from the high-background radioactivity area

Journal Article · Thu Mar 01 04:00:00 EST 1973 · Sci. Pap. Inst. Phys. Chem. Res. (Jap.), v. 67, no. 1, pp. 35-40

OSTI ID:4389759

Matsuyama, A; Okazawa, Y; Arai, H; Mifune, M

The microflora in the high-background radioactivity areas in Japan was surveyed in order to obtain radioresistant vegetative bacteria. Several strains isolated exhibited appreciable resistance to gamma rays. The induction dose and D/sub 10/ value of the most radiation resistant strain B 12 were 640 and 370 krad with respect to log-phase cells, and 1300 and 353 krad with respect to stationaryphase ones, respectively. By a taxonomic study, strain B 12 was tentatively classified as Micrococcus sp. The results of sedimentation analysis of DNA suggest that remarkable radiation resistance of this strain can be explained in terms of the efficient capacity of DNA repair, as previously indicated with M. radiodurans. (auth)

• Research Organization: Inst. of Physical and Chemical Research, Wako, Japan
• NSA Number: NSA-29-005294
• OSTI ID: 4389759
• Journal Information: Sci. Pap. Inst. Phys. Chem. Res. (Jap.), v. 67, no. 1, pp. 35-40, Journal Name: Sci. Pap. Inst. Phys. Chem. Res. (Jap.), v. 67, no. 1, pp. 35-40; ISSN SPIPA
• Country of Publication: Japan
• Language: English

Related Subjects

*MICROCOCCUS-- RADIOSENSITIVITY
BIOLOGICAL RADIATION EFFECTS
DNA
DOSE-RESPONSE RELATIONSHIPS
GAMMA RADIATION
IRRADIATION
JAPAN
N48310* --Life Sciences--Radiation Effects on Microorganisms- -Basic Studies
NATURAL RADIOACTIVITY
SURVIVAL CURVES
TEMPERATURE DEPENDENCE