Iodine-129: a study of its transport in the environment and distribution in biological systems. Final progress report Appendix

Technical Report · Thu Jun 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/6469297· OSTI ID:6469297

Manuel, O K

Many of the results of our four year study on the transport and distribution of /sup 129/I were presented to the funding agency in earlier annual reports, in manuscripts, and in a Ph.D. dissertation. Additional experimental data have been collected and will be presented in separate publications. These studies show a value of 1.5 x 10/sup -14/ < or = /sup 129/I//sup 127/I < or = 9.8 x 10/sup -14/ for natural iodine prior to the nuclear era, a value of /sup 129/I//sup 127/I = 7.6 x 10/sup -10/ in the U.S. biosphere in 1947, and modern values in the Missouri biosphere of /sup 129/I//sup 127/I = 1.8 x 10/sup -8/ in deer, /sup 129/I//sup 127/I = 5.9 x 10/sup -9/ in cow, /sup 129/I//sup 127/I = 2.3 x 10/sup -9/ in human, and /sup 129/I//sup 127/I = 1.8 x 10/sup -9/ in hog. Since the iodine content of mammalian thyroids is approximately constant, the content of /sup 129/I is highest in deer thyroids, where /sup 129/I = 3 x 10/sup -3/ pCi per g of thyroid (wet weight). Lower /sup 129/I contents of domesticated animal and human thyroids are attributed to dilution of /sup 129/I from the natural geochemical cycle with mineral iodine that is added to their diets. A survey on iodine in commercial milk in Missouri revealed modern values of /sup 129/I//sup 127/I = (4 to 10) x 10/sup -9/ and a value of 0.0004 pCi per liter for the /sup 129/I content.

• Research Organization: Missouri Univ., Rolla (USA). Dept. of Chemistry
• OSTI ID: 6469297
• Report Number(s): COO-2450-7(app.)
• Country of Publication: United States
• Language: English

Related Subjects

510302 -- Environment
Terrestrial-- Radioactive Materials Monitoring &amp; Transport-- Terrestrial Ecosystems &amp; Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
560171* -- Radiation Effects-- Nuclide Kinetics &amp; Toxicology-- Man-- (-1987)
560172 -- Radiation Effects-- Nuclide Kinetics &amp; Toxicology-- Animals-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOSPHERE
BODY
CATTLE
COWS
DEER
DOMESTIC ANIMALS
ENDOCRINE GLANDS
ENVIRONMENT
GLANDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE 127
IODINE 129
IODINE ISOTOPES
ISOTOPE RATIO
ISOTOPES
MAMMALS
MAN
MONITORING
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PRIMATES
RADIATION MONITORING
RADIOACTIVITY
RADIOISOTOPES
RUMINANTS
STABLE ISOTOPES
SWINE
THYROID
VERTEBRATES
YEARS LIVING RADIOISOTOPES