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Title Changes with age in the absorption of radiocaesium by sheep.CEH Staff publications
Name(s) Mayes, R W
Eayres, H F
Beresford, N A (Nick)
Lamb, C S
Howard, B J (Brenda J.)
Publication 1992
Subjects T07051g5; CEH staff publication;
Abstract The absorption of ionic 137Cs was determined in groups of lambs ranging in age from 11 to 59 weeks fed ewes' milk or fresh perennial ryegrass. Absorption was measured as either the apparent (Aa) or true absorption coefficient (A1). Whereas Aa declined with age, A1 appeared not to change with age but was higher (1.00) where the 137Cs was incorporated into milk, than when administered in a way which simulates incorporation into a solid feed (0.80 - 0.85). Previously observed differences in transfer coefficients for animals of different ages appear not to be due to changes in transfer across gut.
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