[The dependence of the biological effect of electron radiation on the pulse repetition rate. The dependence of mortality and life span in rats on the radiation dose and pulse repetition rate]. / Zavisimost' biologicheskogo éffekta élektronnogo izluchenia ot chastoty sledovaniia impul'sov. Zavisimost' smertnosti i prodolzhitel'nosti zhizni krys ot dozy izlucheniia i chastoty sledovaniia impul'sov.

Quantitative regularities have been established for mortality and life-span of rats in relation to the pulse recurrence frequency (3-2400 s-1) of electron radiation with electron energies of 25 and 50 MeV. Electrons with pulse recurrence frequencies of 600 and 1200 s-1 have shown a higher biological effectiveness.

[The dependence of the biological effect of electron radiation on the pulse repetition rate. The characteristics of the clinical manifestations in rats after irradiation at superlethal doses]. / Zavisimost' biologicheskogo éffekta élektronnogo izlucheniia ot chastoty sledovaniia impul'sov. Osobennosti klinicheskikh proiavlenii u krys posle oblucheniia v sverkhletal'nykh dozakh.

A comparison between biological effects of electron radiation (25 and 50 MeV) at doses of 100-300 Gy and with pulse recurrence frequencies from 3 to 2400 s-1, using general damage severity, distinctiveness of separate clinical manifestations and incidence of extremely severe forms of radiation sickness as criteria, has demonstrated some peculiarities of radiation pathology in rats under these circumstances. The pulse recurrence frequency influence varies with the criterion applied.

[Characteristics of the development of radiation sickness in guinea pigs exposed to non-uniform irradiation in highly lethal doses]. / Osobennosti razvitiia luchevoi bolezni u morskikh svinok pri neravnomernykh obluchenniakh v sverkhletal'nykh dozakh.

Certain peculiarities have been revealed in the development of radiation sickness in guinea pigs subjected to nonuniform irradiation with superlethal doses. With electron and gamma-neutron radiation LD50/1.5 was 116.11 and 114.48 Gy respectively, when delivered to whole body, and 133.40 and 111.72 Gy when delivered to the posterior part of the body.

[The RBE of 0.85-MeV neutrons in the cerebral form of radiation sickness in guinea pigs]. / OBE neitronov s énergiei 0,85 MéV pri tserebral'noi forme luchevoi bolezni u morskikh svinok.

The RBE coefficient of neutrons (0.85 MeV) was 1.87 in comparison with that of electron radiation (8 MeV) as determined by the death rate of guinea pigs with the cerebral form of radiation sickness. LD50/1.5 amounted to 43.2 and 80.7 Gy. The dynamics of clinical symptoms at the height of the disease is discussed.

[The RBE of 0.85-MeV neutrons in the intestinal form of radiation sickness in guinea pigs]. / OBE neitronov s énergiei 0,85 MéV pri kishechnoi forme luchevoi bolezni u morskikh svinok.

Relative biological effectiveness (RBE) coefficient of 0.85 MeV neutrons was 1.87 in comparison with 0.66 MeV gamma radiation (137Cs) when estimated by the death rate of guinea pigs with intestinal form of radiation sickness. LD50/5 was 5.9 and 11.06 respectively. Features of the mortality rate dynamics, clinical picture and pathoanatomical changes are discussed.

[The RBE of 0.85 MeV neutrons on guinea pig mortality]. / OBE neitronov s énergiei 0,85 MéV po smertnosti morskikh svinok.

A comparative study was made of the death rate of guinea pigs after neutron (0.85 MeV) and 137Cs-gamma-radiation (0.66 MeV); LD50/30 were 1.58 and 3.44 Gy respectively. CRBE of neutrons was 2.2 as determined by median lethal dose values for guinea pigs.