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Science 17 May 1963:
Vol. 140. no. 3568, pp. 801 - 802
DOI: 10.1126/science.140.3568.801
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Articles

Iodine-131 in the Thyroids of North American Deer and Caribou: Comparison after Nuclear Tests

W. C. Hanson 1, F. W. Whicker 2, and A. H. Dahl 2

1 Hanford Laboratories, General Electric Company, Richland, Washington
2 Radiology Section, Colorado State University, Fort Collins

Concentrations of I131 in the thyroids of deer from Washington, Colorado, and Maryland, and of caribou from Alaska were measured after the resumption of nuclear weapon tests by the U.S.S.R. on 1 September 161. Maximum concentrations occurred nearly 2 months after the first nuclear test and then decreased at an effective half-time of about 15 days. Thyroids from Washington and Colorado deer showed the highest concentrations, thyroids from Alaskan caribou the lowest.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)