Document Detail


129I and 137Cs fission products in thyroids of animals, 1984-1991.
MedLine Citation:
PMID:  8416215     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Iodine is intensely concentrated in the thyroid of animals, while 137Cs is not. In this study, 129I and 137Cs concentrations were determined in animal thyroids from selected areas during 1984-1991. The thyroids were from deer killed within the Savannah River Site (SRS) in South Carolina; from the environs of Oak Ridge (OR), Tennessee; West Tennessee; and Florida. Thyroids from sheep slaughtered routinely in Birmingham, England (UK), were also tested. The glands were analyzed by x-ray spectroscopy using a high-purity germanium well detector. 129I concentrations of 1 to 102 Bq 129I (g thyroid)-1 were found in 6.8% of deer thyroids from SRS. Eighty-nine percent of the thyroids from SRS and 38% of those from OR contained 129I concentrations of 0.01 to 1.0 Bq 129I g-1. No thyroids from West Tennessee or Florida had more than 4 mBq 129I g-1. Cesium was found to be distributed differently; 38% of the thyroids from SRS contained 0.1 to 0.65 Bq 137Cs g-1, and the highest concentrations appeared periodically, during November and December. Ten to 100 mBq of 137Cs were found in 60% of thyroids from SRS, 79% of those from Florida, 52% of those from OR, and 22% of those from West Tennessee. In thyroids from SRS and Florida, most of the 137Cs has been from worldwide fallout on sandy soil which permits 137Cs-rich vegetation; if a fraction of the 137Cs is from other sources, it has not been defined. The unique finding of this report is the high incidence and persistence of > 0.01 Bq 129I (g thyroid)-1 in deer from OR and SRS. 129I is a marker for fission products, but it is not a radiological hazard because of its very slow radioactive decay and its continual dilution by additions of nonradioactive iodine to the environment.
Authors:
L Van Middlesworth
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Health physics     Volume:  64     ISSN:  0017-9078     ISO Abbreviation:  Health Phys     Publication Date:  1993 Jan 
Date Detail:
Created Date:  1993-01-14     Completed Date:  1993-01-14     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  2985093R     Medline TA:  Health Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  52-8     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Cesium Radioisotopes / analysis*
Deer*
England
Environmental Exposure
Florida
Iodine Radioisotopes / analysis*
Nuclear Fission
Radioactive Fallout
Sheep*
Soil Pollutants, Radioactive*
South Carolina
Tennessee
Thyroid Gland / chemistry*
Grant Support
ID/Acronym/Agency:
4K06DK00040-26/DK/NIDDK NIH HHS
Chemical
Reg. No./Substance:
0/Cesium Radioisotopes; 0/Iodine Radioisotopes; 0/Radioactive Fallout; 0/Soil Pollutants, Radioactive

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


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