[Effect of lowered relative humidity of the air on the accumulation of plutonium-239 in the body and its biological effectiveness]. / Vliianie ponizhennoi otnosite'lnoi vlazhnosti vozdukha na povedenie plutoniia-239 v organizme i ego biologicheskuiu éffektivnos't.

The experiments on rats show that the 4-month elevated air dryness has no impact on body accumulation of 239Pu but causes more distinct forms of bronchitis and interstitial pneumonia combined with the strain in medullary hemopoiesis and reactivity intensification of pulmonary and B-system immunity. Under prolonged effect of both factors a breakdown in fully adequate immune response can occur.

[Unification of the staining of histological preparations and histoautoradiograms with Harris hematoxylin]. / Unifikatsiia okraski gistologicheskikh preparatov i gistoavtoradiogramm gematoksilinom Garrisa.

The method of the paraffin or celloidin-paraffin sections and histoautoradiogram accelerated staining with Harris haematoxylin is suggested. The quality of staining with this haematoxylin of all organs and tissues of rats sacrificed under the ether narcosis or after natural death is evaluated. All the histoautoradiogram treatment (exposition, development, fixation, washing and staining) is being carried out in the same cassette this excluding the possibility of the photolayer and section damage. Harris haematoxylin enables the elective nuclear staining and this allows, without detriment to the quality, using the cassette method of staining with this reagent in laboratories with a large bulk of work and recommending it for elaboration of the technical standards.

[Longevity of animals in combined exposure to total gamma irradiation and incorporated plutonium-239]. / Prodolzhitel'nost' zhizni zhivotnykh pri kombinirovannom vozdeistvii total'nogo gamma-oblucheniia i inkorporirovannogo plutoniia-239.

The paper presents the functions and nomograms permitting to estimate the expected consequences of the combined effect of alpha-radiation from incorporated plutonium 239 and external gamma-rays at random doses on the lifetime of animals.

[Dynamics of the microdistribution of 239Pu in immunocompetent structures of the rat spleen after administration of the nuclide in the nitrate form]. / Dinamika mikroraspredeleniia 239Pu v immunokompetentnykh struktur selezenki krys posle vvedeniia nuklida v organizm v forme nitrata.

The histoautoradiographic study has demonstrated that during the first 24 hours following the administration, plutonium is distributed diffusely and in the form of aggregates corresponding to reticular cells of marginal and brain sinuses. In addition, after 7 days on, one could observe phagocytosis of 239Pu particles and aggregates by the interdigiting reticular cells and migration thereof into follicle region where the cooperative relations occur between T- and B-lymphocytes. The absorbed radiation dose in the interdigiting cells is estimated.

[Long-term effects of combined exposure to external 137Cs gamma-radiation and incorporated 239Pu]. / Otdalennye posledstviia sochetannogo vozdeistviia vneshnego gamma-oblucheniia 137Cs i inkorporirovannogo 239Pu.

A study was made of the delayed effects of mixed exposure to 137Cs-gamma-radiation (a single exposure) and 239Pu (a single intravenous injection) in doses approximating optimal blastomogenic ones. The results are calculated per 1 cGy of weighted mean dose within the body with regard for RBE (1 cSv), per cent of osteosarcomas (per 1 cGy in endosteum and periosteum). A conclusion is made of a complete summation of main biological effects per 1 cSv of the dose absorbed.