Abstract
In a previous paper (Bleaney, 1968) a description was given of the pattern of deposition of plutonium on the bone surfaces of six-week-old rabbits following an intravenous injection of plutonium nitrate. The dose-rates near bone surfaces were estimated from α track counts obtained by autoradiography. The experiments have been repeated with seven-month-old, fully grown rabbits and the distribution pattern of plutonium in these animals has been compared with that in the weanling rabbits. Another group of seven-month-old rabbits has been given intrasmuscular injections of plutonium nitrate, and distributions have been compared with those in animals given intravenous injections. Intramuscular injection should provide a better comparison with the situation arising in human contamination, where plutonium can enter the body through wounds from contaminated glassware or instruments. It has often been assumed that with wounds, the plutonium remains localised at the site of entry and is excreted very slowly. This p...
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