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Media type:
E-Article
Title:
Replacement Rates for Human Tissue from Atmospheric Radiocarbon
Contributor:
Libby, W. F.;
Berger, Rainer;
Mead, J. F.;
Alexander, G. V.;
Ross, J. F.
imprint:
American Association for the Advancement of Science (AAAS), 1964
Published in:Science
Language:
English
DOI:
10.1126/science.146.3648.1170
ISSN:
0036-8075;
1095-9203
Origination:
Footnote:
Description:
<jats:p>Carbon-14, derived from the testing of thermonuclear weapons in the atmosphere of the Northern Hemisphere during 1961-62, has been found in human tissues including the brain in amounts which reflect the atmospheric concentration of carbon-14 as of several months earlier. In collagen of cartilage, the rate of uptake of carbon-14 is much slower than in other tissues; essentially no radioactive carbon was found in the collagen of 70-year-old adults that had been exposed to the comparatively high concentrations of carbon-14 in the atmosphere during the years 1954 to 1964. Individuals from the Southern Hemisphere show little increase in the carbon-14 content of their tissues at present, and detailed tests with individuals traveling to the Northern Hemisphere from the Southern allow closer scrutiny of the tissue replacement rates.</jats:p>