[Changes in the resistance of mice to whole-body lethal irradiation after local irradiation of the abdominal area]. / Izmenenie rezistentnosti myshei k obshchemu letal'nomu oblucheniiu posle lokal'nogo oblucheniia oblasti zhivota.

The resistance of mice to whole-body irradiation with lethal doses, after preirradiation of part of the abdomen, was studied with a reference to radiation dose, the volume of local exposure, and the interval between exposures. The radioresistance was found to increase when the preirradiated zone corresponded to the spleen projection, the interval between exposures was 3-7 days, and the dose of local exposure, 2 Gy.

[Radiation resistance of animals subjected to lethal irradiation with chemical protection]. / K voprosu o radiorezistentnosti zhivotnykh, perenesshikh letal'noe obluchenie v usloviiakh khimicheskoi zashchity.

The data are presented on radioresistance of mice 1, 5 and 9 months after irradiation (LD95-99/30) in conditions of protection with cystamine. It was shown that the resistance of these animals to repeated irradiation with LD50/30 is considerably lower than that of the animals not exposed previously. The radioresistance and such indices of the haemopoietic system status as quantity of caryocytes and colony-forming capacity of the bone marrow are compared.

[Damage and repair of bone marrow CFUf and CFUc at different times after whole body sublethal gamma-irradiation of animals]. / Povrezhdenie i vosstanovlenie KOEf i KOEc kostnogo mozga v razlichnye sroki posle obshchego subletal'nogo gamma-oblucheniia zyivotnykh.

Cellularity and colony-forming ability of stromal (CFUf) and haemopoietic (CFUc) bone marrow stem cells have been studied at different times after irradiation. The results obtained are indicative of the similarity between the kinetics of the damage and repair of stromal and haemopoietic stem cells.

[Survival of irradiated animals and the preservation of CFUs after the administration of various radioprotectors]. / Vyzhivaemost' obluchennykh zhivotnykh i sokhrannost' KOEs pri vvedenii nekotorykh radioprotektorov.

The comparative data are presented concerning the 30-day restoration of the bone marrow cellularity and the number of endogenous colonies in the spleen of the control animals and of those treated with the radioprotective agents after irradiation with doses from 4.5 to 8.1 Gy. There was a good agreement between the results of studies in the integrity of the haemopoietic system on day 9 after irradiation and the 30-day survival of animals.