Comparative study of RBE with exposure to alpha radiation of yeast cells at different stages of growth

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Radiobiology (USSR) (Engl. Transl.); (United States)

OSTI ID:7316477

Petin, V G; Kabakova, N M

A comparative study was made of RBE with exposure to ..cap alpha..-radiation of haploid and diploid yeast at the stationary and logarithmic stages of growth. RBE constituted 1.8 with irradiation of haploid yeast at the stationary phase of growth, and it was unrelated to dosage; at the logarithmic stage, in the region of the resistant tail of the survival curve, RBE increased from 2.0 to 9.0 with increase in radiation dose. With irradiation of resting diploid yeast, the shape of the survival curve showed little relationship to quality of radiation; only minor elevation of RBE was observed (from 3.1 to 5.0) in the region of the arm of the survival curve; at the logarithmic stage of growth, there was sharp decrease in curvature of the survival curve after exposure to ..cap alpha..-particles, because of which the RBE of ..cap alpha..-radiation increased sharply from 3.5 for large doses to 16.0 in the region of small doses. The authors discuss the observed differences in RBE as function of dosage for haploid and diploid cells at different stages of growth.

• Research Organization: Scientific Research Inst. of Medical Radiology, Obninsk, USSR
• OSTI ID: 7316477
• Journal Information: Radiobiology (USSR) (Engl. Transl.); (United States), Journal Name: Radiobiology (USSR) (Engl. Transl.); (United States) Vol. 17:1; ISSN RADBA
• Country of Publication: United States
• Language: English

Related Subjects

560131* -- Radiation Effects on Microorganisms-- Basic Studies-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALPHA PARTICLES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BIOMASS
CHARGED PARTICLES
DOSE-RESPONSE RELATIONSHIPS
ENERGY SOURCES
FUNGI
MICROORGANISMS
PLANTS
PLOIDY
RADIATION EFFECTS
RBE
RENEWABLE ENERGY SOURCES
SACCHAROMYCES
SACCHAROMYCES CEREVISIAE
SURVIVAL CURVES
YEASTS