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• W2595162382 abstract "Purpose: Investigation of macro and micro distribution of 239PuO2 in the lungs of rats and metabolic parameters taking into account the variability of initial bronchoalveolar deposits. Materials and methods: Plutonium dioxide was single introduced intracheal into nonlinear male rats in the amount of 100 kBq / kg of body weight. The experimental animals were observed during their life. Lifetime measurement of radioactivity of the body and excreta and posthumous radiometry of organs were made. Auto and histoautoradiografic study of lungs and lymph nodes were performed. Results: 239PuO2 particles are removed from the respiratory organs most intensively during the first 7 days. Slowing of metabolic processes is observed in the period from 7 to 200 days. The data on post-mortem 239PuO2 content in the lungs and regional lymph nodes of rats indicate a decrease of the content of plutonium dioxide in the lungs and no reduction in the lymph nodes with time. Three periods of effective half-life of plutonium dioxide from the lungs were experimentally identified and calculated. These values indicate that the parameters of the respiratory clearance depend on the value of the initial radionuclide bronchoalveolar deposits. Conclusions: Сonsiderable variability of plutonium dioxide content in the lungs and regional lymph nodes of rats following intratracheal administration has been shown. Neven distribution of 239PuO2 with the expressed α-particle aggregation assumes a significant difference in the local fabric of absorbed radiation doses in the lungs, but does not exclude the possibility of their calculation on the respiratory system as a whole. Options clearance from the respiratory 239PuO2 correspond to the values of the initial bronchoalveolar deposits. The cleansing light of plutonium dioxide, in contrast to its soluble compounds, the role of radionuclide transport blood to other organs and tissues is not of great impotance . The results presented plutonium dioxide metabolism studies administered intratracheally, testifies to the fact that the implementation of the biological effects of the compounds can be expected mainly in the lungs. Evidence about the profile respiratory disease will be presented in a subsequent communication." @default.
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• W2595162382 date "2017-02-26" @default.
• W2595162382 modified "2023-09-27" @default.
• W2595162382 title "Dioxide plutonium-239 in the lung. Report 1: Metabolism 239PuO2 with intratracheal administration" @default.
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• W2595162382 doi "https://doi.org/10.12737/25029" @default.
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