[Enhanced body radioresistance resulting from the transfusion of autologous blood irradiated with low doses of ionizing radiation]. / Povyshenie radiorezistentnosti organizma v rezul'tate transfuzii autogennoi krovi, obluchennoi malymi dozami ioniziruiushchego izlucheniia.

Preliminary administration of autogenic blood irradiated in vitro with ionizing radiation in small doses of 0.05, 0.3 or 0.5 Gy resulted in a pronounced increase in the radioresistance of mice [correction of rats] subsequently irradiated in a dose of 9 Gy. The optimum was autotransfusion of blood irradiated in a dose of 0.3 Gy a day or 10 days prior to the total irradiation which increased the survival rate of experimental animals to 80% while, in control groups, the survival rate was only 10%.

[Characteristics of the viral and bacterial associations in acute pneumonias in children]. / Kharakteristika virusno-bakterial'nykh assotsiatsii pri ostrykh pnevmoniiakh u detei.

The results obtained in the study of children with acute pneumonia in Frunze (761 live patients and 125 children who had died of this disease) revealed the prevalence of viro-bacterial associations: they were detected in 72.4% of cases of acute pneumonia without lethal termination and in 100% of cases with lethal termination. Most of the pathogenic or opportunistic bacteria isolated from the live patients with acute pneumonia were associated with influenza, parainfluenza and adenovirus infections, while in the children who had died of this disease mixed viro-viral or viro-mycoplasmic associations prevailed. Viro-bacterial associations detected in children with acute pneumonia comprised most frequently influenza, infection in the cold season and adenovirus and mycoplasmic infections in the warm season.

[Method of irradiating bioobjects and results of dosimetric measurements on the biosatellite "Cosmos-690"]. / Metodika oblucheniia bioob''ektov i rezul'taty dozimetricheskikh izmerenii na biosputnike "Kosmos-690".

The paper describes the design and experimental conditions of rat irradiation aboard the biosatellite Cosmos-690. An essential dose gradient due to different distances between the gamma-source and irradiated rats as well as due to the presence of construction components and equipment in the beam was made up by a special dose-equilibrating filter. The spectral distribution of scattered radiation reached maximum in the region of 0.1--0.3 Mev. The average dosage in the location of the main group of animals was 800 +/- 85 rad and that in the location of an additional group was 220 +/- 25 rad.

Irradiation of bio-objects aboard the Cosmos 690 biosatellite.

Animals on the Cosmos 690 were exposed to Cs 137 gamma-radiation of 320 curies. The on board emitter was a spherical container made of tungsten alloy with a gamma source placed in the centre. A special dose filter provided a uniform +/-10% distribution of the dose field. Animal containers were equipped with thermoluminescent dosimeters. Radiation was monitored by an on-board dosimeter and displayed. The emitter was controlled by commands from the ground. On the tenth flight day the emitter was turned on and bio-objects were exposed for 24 hours. The dose received by bio-objects located in different areas of the biosatellite varied from 200 to 1000 rad. The flight experiment confirmed entirely the reliability of the radiation system.