Document Detail


The transfer of radiocaesium to ewes through a breeding cycle--an illustration of the pitfalls of the transfer coefficient.
MedLine Citation:
PMID:  17765367     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A study to measure the transfer of radiocaesium to adult female sheep through a breeding cycle is described. The transfer of radiocaesium from the diet to muscle (estimated as the equilibrium transfer coefficient) was significantly lower to pregnant, and especially lactating, animals compared to non-lactating and barren animals. High dry matter intake rates were also associated with significantly lower transfer coefficients. Known relationships between dry matter intake rates and protein turnover could credibly explain some of these differences. However, when described as the concentration ratio, radiocaesium transfer to meat was apparently highest during lactation. The apparent difference in results obtained by the two approaches of determining transfer is the consequence of daily dry matter intake being a denominator within the estimation of transfer coefficient. A wider discussion of transfer coefficients and concentration ratios leads us to suggest that the concentration ratio is the more robust and potentially generic parameter.
Authors:
N A Beresford; R W Mayes; C L Barnett; B J Howard
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Publication Detail:
Type:  Journal Article     Date:  2007-09-04
Journal Detail:
Title:  Journal of environmental radioactivity     Volume:  98     ISSN:  0265-931X     ISO Abbreviation:  J Environ Radioact     Publication Date:  2007  
Date Detail:
Created Date:  2007-10-23     Completed Date:  2008-04-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508119     Medline TA:  J Environ Radioact     Country:  England    
Other Details:
Languages:  eng     Pagination:  24-35     Citation Subset:  IM    
Affiliation:
Centre for Ecology and Hydrology, CEH-Lancaster, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK. nab@ceh.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Administration, Oral
Animal Feed
Animals
Breeding
Cesium Radioisotopes / administration & dosage,  pharmacokinetics*
Female
Lactation
Male
Pregnancy
Reproducibility of Results
Sheep
Chemical
Reg. No./Substance:
0/Cesium Radioisotopes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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