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  • Title: The behaviour of uranium-233 oxide and uranyl-233 nitrate in rats.
    Author: Cooper JR, Stradling GN, Smith H, Ham SE.
    Journal: Int J Radiat Biol Relat Stud Phys Chem Med; 1982 Apr; 41(4):421-33. PubMed ID: 6978863.
    Abstract:
    233UO2 and 233UO2(NO3)2 in aqueous suspension have been administered to rats by pulmonary intubation. The 233U associated with the fraction of the 233UO2 less than 4 nm in diameter translocates from lungs to blood at the same rapid rate as 233U from 233UO2(NO3)2. Identical reactions with blood plasma and lung fluid were observed whether the 233U was administered as less than 4 nm 233UO2 particles or 233UO2(NO3)2. It is suggested that oxidation of UO2 to UO3 occurs followed by the formation of uranyl ion. In blood plasma, approximately 50 per cent of the 233U is bound to transferrin, 25 per cent to citrate and 25 per cent on bicarbonate.
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