RADIATION DAMAGE OF YEAST AS A FUNCTION OF ITS PHYSIOLOGICAL STATE (in Russian)
The radiosensitivity, the oxygen effect, and the ability of yeast cells to recuperate after irradiation were investigated as a function of the process of germination and of the state of exhaustion of the yeast cells. A suspension of yeast cells of Saccharomyces vini of the Megri 139-B strain were prepared as an aqueous suspengion, and irradiated with Co/sup 60/ gamma rays. Fresh and exhausted yeast cells showed the same percentage survival on irradiation in air. Germination of the yeast cells starts at 1.5 hours after incubation, and then increases sharply with time. With increasing germination, the percentage survivals of the yeast cells rises sharply. The recuperative ability of exhausted cells is less than that of fresh yeast cells (after a dose of 48 kr, the survival of fresh cells increased from 10 to 75% after 24 hours incubation, while the survival of exhausted yeast cells increased only from 10 to 17%). On removing oxygen during the irradiation, the percentage of survivals increases markedly for fresh yeast cells, but is much less noticeable for the irradiation of exhausted yeast cells. The oxygen effect is the same for germinated yeast cells as for fresh yeast cells. Yeast cells irradiated in a state of rest (no mitotic activity) show the greatest tendency to recuperate in the post-radiation period. (TTT)
- Research Organization:
- Moscow Univ.
- NSA Number:
- NSA-16-032809
- OSTI ID:
- 4769273
- Journal Information:
- Radiobiologiya (U.S.S.R.) For English translation see Radiobiology (Engl. Transl.), Journal Name: Radiobiologiya (U.S.S.R.) For English translation see Radiobiology (Engl. Transl.) Vol. Vol: 2; ISSN RADOA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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