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Radiation Protection Dosimetry Advance Access originally published online on October 5, 2004
Radiation Protection Dosimetry 2004 112(3):385-393; doi:10.1093/rpd/nch405
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Radiation Protection Dosimetry Vol. 112, No. 3 © Oxford University Press 2004; all rights reserved

Long-term accumulation of uranium in bones of Wistar rats as a function of intake dosages

J. D. T. Arruda-Neto1,2,*, M. V. Manso Guevara1, G. P. Nogueira3, M. Saiki4, A. C. Cestari2, K. Shtejer5, A. Deppman1, J. W. Pereira Filho1, F. Garcia6, L. P. Geraldo4,7, A. N. Gouveia1,8, F. Guzmán9, J. Mesa1, O. Rodriguez1,9, R. Semmler4 and V. R. Vanin1

1 Instituto de Física, Universidade de São Paulo, 05315-970, São Paulo, Brasil
2 Universidade de Santo Amaro/UNISA, 04829-300, São Paulo, Brasil
3 Faculdade de Medicina Veterinária/UNESP, 16050-680, Araçatuba, SP, Brasil
4 Instituto de Pesquisas Energéticas e Nucleares/IPEN, 05508-900, São Paulo, Brasil
5 Centro de Estudios Aplicados al Desarrollo Nuclear, PO Box 6122, Playa, Havana, Cuba
6 Universidade Estadual de Santa Cruz, 45650-000, Ilhéus, Bahia, Brasil
7 Universidade Católica de Santos/UNISANTOS, 11065-420, Santos, SP, Brasil
8 Instituto de Ciências Biomédicas, Universidade de São Paulo, 05508-900, SP, Brasil
9 Instituto Superior de Ciencia y Tecnologías Nucleares, 10600, Plaza, Havana, Cuba

* Corresponding author: arruda{at}usp.br

Groups of Wistar rats were fed with ration doped with uranyl nitrate at concentration A ranging from 0.5 to 100 ppm, starting after the weaning period and lasting until the postpuberty period when the animals were sacrificed. Uranium in the ashes of bones was determined by neutron activation analysis. It was found that the uranium concentration in the bones, as a function of A, exhibits a change in its slope at ~20 ppm—a probable consequence of the malfunctioning of kidneys. The uranium transfer coefficient was obtained and an analytical expression was fitted into the data, thus allowing extrapolation down to low doses. Internal and localized doses were calculated. Absorbed doses exceeded the critical dose, even for the lowest uranium dosage.


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