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Voigt, G.M. ; Henrichs, K. ; Pröhl, G. ; Paretzke, H.G.

Measurements of transfer coefficients for¹³⁷Cs,⁶⁰Co, ⁵⁴Mn,₂₂Na, ¹³¹I and ^95mTc from feed into milk and beef.

Radiat. Environ. Biophys. 27, 143-152 (1988)

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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.

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The transfer in cattle of the radionuclides137Cs,60Co,54Mn,22Na,131I and95mTc was studied experimentally to determine transfer coefficients from feed to milk and meat. Special interest was kept on normal feeding and maintenance conditions used in Germany. The radio-nuclides were incorporated into fodder plants through root uptake and thus available in a chemical form resulting from the contamination of agricultural soil. This permitted realistic simulation of the soil-plant-animal food chain. The equilibrium transfer coefficients for milk were calculated to be22Na: 0.016±0.002 d/l,60Co: ≤0.0002 d/l,54Mn: ≤0.0005 d/l, and137CS : 0.0022±0.0002 d/l. The equilibrium transfer coefficients for meat were calculated to be22Na: 0.01±0.002 d/kg,60Co: ≤0.00013 d/kg,54Mn : ≤0.0005 d/kg, and137Cs: 0.0062±0.0006 d/kg. A single dose of131I was orally administered three times in the chemical form of iodide. Models were applied to obtain parameters for a quantitative description of the iodine metabolism. The equilibrium transfer factor for131I in this chemical form to milk was calculated to be 0.009±0.0014 d/l. For95mTc only an upper limit of the transfer factor of 1.7 · 10-4 d/l could be estimated because of the small amount of radioactivity available.

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