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[en] The 210Po concentration in the hair of 51 radium dial painters (one group of 29 male, and the another group of 22 female) was reported in this paper. It was found that the 210Po concentration in the hair of both the male and female painters were significantly higher than that of the controls (for the male painters p = 0.0025, for the female painters p < 0.0005). A correlation has also been observed between the 210Po concentration in the hair and the working ages of the male painters
[en] This chapter provides a general overview of the occurrence, behaviour and cycling of 210Pb and 210Po in the environment and covers some major concepts and pathways. The data presented give a feeling for the orders of magnitude of activity concentrations which can be expected in environmental media and the relative importance of various pathways. However, the information is not comprehensive, nor does it provide details of the mechanisms involved. Environmental media and pathways are discussed in more detail in Chapters 5-10, including data on activity concentrations, transfer parameters and fluxes.
[en] The metabolic formation of volatile 210Po species in a rat that was intravenously administered with 210Po-citrate was investigated in this study. A slurry of the faecal sample was prepared in water and was bubbled with nitrogen gas in a closed system. The discharged gas was passed through a trapping device filled with liquid scintillation cocktail in order to capture any volatile 210Po species. The amount of 210Po trapped in the scintillation cocktail was measured by a liquid scintillation analyser that provided evidence of the presence of volatile 210Po species in the faeces. The presence of volatile 210Po in the faeces indicates that the metabolic formation of volatile 210Po is likely to occur in the gut due to bacterial activity. The amount of volatile 210Po species was compared with the daily faecal excretion of 210Po. After 2 h of bubbling, the volatile 210Po collected from the faeces sample was found to be between 1.0 and 1.7 % of the daily faecal excretion for the 4 d following 210Po-citrate administration. (authors)
[en] Content of polonium 210 was studied in the leaves of six varieties of Bulgarian oriental tobacco according to their class. Tobacco that had to be examined was kept for more than three years for equilibrium between polonium 210 and lead 210 to be reached. Tobacco leaves of higher classes contained smaller quantities polonium 210 compared with those of lower classes (III-V classes). This is due to leaves of the upper and middle parts of the plant with a shorter vegetation period belonging to higher tobacco classes; radionuclide penetration by the root. The established divergence from this relationship was due to some other reasons such as mechanical damage, etc. (A.B.)
[en] This chapter summarizes the physical and chemical properties of polonium and acts as a reference for the subsequent chapters. It includes decay data and series systematics, solution chemistry and adsorption, and methods of determining 210Po activity concentrations in samples.
[en] Measurement capability and data comparability are essential for emergency response when analytical data from cooperative laboratories are used for risk assessment and post incident decision making. In this study, the current capability of food emergency response laboratories for the analysis of 210Po in water was evaluated using a proficiency test scheme in compliance with ISO-43 and ILAC G13 guidelines, which comprises a test sample preparation and verification protocol and an insightful statistical data evaluation. The results of performance evaluations on relative bias, value trueness, precision, false positive detection, minimum detection limit, and limit of quantification, are presented. (author)
[en] The bioaccumulation of natural radionuclides in marine organisms along the Rio de Janeiro coast was studied. Significant levels of 210Po were found in the edible bivalve Perna perna linnaeus, 1758. The level of 210 Po in the soft tissue of bivalves collected along the Ponta Negra rock there was three times higher than that of similar organisms collected near Boa Viagem. (M.A.C.)
[pt]Estuda-se a bioacumulacao de radionuclideos naturais em organismos marinhos na costa do Rio de Janeiro. Encontram-se niveis significantes de 210 Po no bivalve comestivel Perna perna linnaeus. O nivel de 210 Po em tecidos moles dos bivalves coletados ao longo da praia de Ponta Negra apresenta-se tres vezes mais elevado em comparacao aqueles coletados proximos a praia de Boa Viagem. (M.A.C.)
[en] Full description of the 210Po contamination of the southern Baltic ecosystem creates need for determination of the content of polonium in the sea birds' bodies. Presented paper descries the recently obtained results of the polonium content in different tissues and routs of its incorporation into the organism. 210Po concentration varied from 0.16 to 18.90 Bq/g in different organs and from 0.47 to 5.70 Bq/g in feathers. Obtained values are discussed in terms of the nutrition customs and the diet composition. It has been found, that 63% of the 210Po is adsorbed in the form present in the air and 36% only is incorporated into the different organs, skin and feathers
[en] Polonium-210 is a radio-isotopes natural α emitter, it cans be found in tobacco with a significant range. The high activity of 210Po in tobacco and cigarettes causes the absorption of a high dose of alpha radiation that caused probably lung cancer, the objective of this study is to estimate the activity of 210Po in tobacco matrix. Thirteen samples of cigarettes consumed in tunisia were experimented to determine the activity of this radionuclide. The PIPS, a silicon semiconductor, is used as on α spectrometry detector for the detection of 210Po in all of our samples. The final results showed a high radioactivity of 210Po from 11.77 to 25.31 mBq/g. We conclude that the effective annual average is estimated at 106.53 μSv / year.