Record Display for the EPA National Library Catalog


Main Title Absorption, Distribution and Milk Secretion of Radionuclides by the Dairy Cow - V. Radiotungsten.
Author Mullen, A. L. ; Bretthauer, E. W. ; Stanley., R. E. ;
CORP Author Environmental Monitoring and Support Lab., Las Vegas, Nev.;Energy Research and Development Administration, Washington, D.C.
Year Published 1972
Report Number EPA/600/J-76/049; AT(26-1)-539;
Stock Number PB-266 821
Additional Subjects Health physics ; Radioactive isotopes ; Tungsten isotopes ; Dairy cattle ; Food chains ; Absorption(Biology) ; Radiation dosage ; Deposition ; Tissues(Biology) ; Body fluids ; Milk ; Experimental data ; Bioassay ; Ingestion(Biology) ; Parenteral infusions ; Reprints ; Environmental transport ; Bioaccumulation ; Radioecology
Library Call Number Additional Info Location Last
NTIS  PB-266 821 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
In a study conducted in 1969 and 1970 lactating cows were given oral or intravenous (I.V.) doses of radiotungsten. Blood, milk, urine and feces were collected and analyzed to measure transfer rate and quantity of tungsten eliminated over an extended period during and after exposure. The average per cent of administered dose secreted per liter of milk at peak activity was 0.01 and 0.1 for the groups receiving oral and I.V. doses, respectively. During the 84-hr period after dosing, 79% of the orally administered dose was recovered, with 64% recovered in the feces, 14.6% in urine and 0.4% in milk. In the same time period, 68% of the intravenous dose was recovered with 65% in urine, 2% in the milk, and less than 1% in feces. Tissue distribution results indicate the principal sites of short-term radiotungsten deposition were skin, liver and soft tissue. Long-term retention sites in mature cows were bone, muscle and skin. Long-term retention sites in calves were bone, adrenal, skin and spleen.