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Naturally occurring strontium is nonradioactive and nontoxic at levels normally found in the environment, but 90 Sr is a radiation hazard. [4] 90 Sr undergoes β − decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an antineutrino, and the yttrium isotope 90 Y, which in turn undergoes β − decay with a half-life of 64 hours and a decay energy ...
It was determined that Sr-90 is a "bone-seeker," depositing in bones and marrow after ingestion. Civilian prisoners were considered for certain radiation testing, mainly Utah State prison inmates. One document revealed tests done on the bones of a stillborn baby showed that strontium-90 levels were 36% higher than the average 55% of other ...
A bone seeker is an element, often a radioisotope, that tends to accumulate in the bones of humans and other animals when it is introduced into the body. For example, strontium and radium are chemically similar to calcium and can replace the calcium in bones. [1][2] Plutonium is also a bone seeker, though the mechanism by which it accumulates ...
It was the first time Wyand, a Navy veteran who lived and worked at the shipyard in the late 1980s, learned he may have been exposed to radium-226 and strontium-90 — radionuclides that build up ...
Specifically, it is an aggressive malignant neoplasm that arises from primitive transformed cells of mesenchymal origin (and thus a sarcoma) and that exhibits osteoblastic differentiation and produces malignant osteoid. [1] Osteosarcoma is the most common histological form of primary bone sarcoma. [2] It is most prevalent in teenagers and young ...
Strontium-90 is a by-product of nuclear fission, present in nuclear fallout. The 1986 Chernobyl nuclear accident contaminated a vast area with 90 Sr. [ 6 ] It causes health problems, as it substitutes for calcium in bone , preventing expulsion from the body.
The mean strontium content of ocean water is 8 mg/L. [50] [51] At a concentration between 82 and 90 μmol/L of strontium, the concentration is considerably lower than the calcium concentration, which is normally between 9.6 and 11.6 mmol/L. [52] [53] It is nevertheless much higher than that of barium, 13 μg/L. [11]
According to Irish scientist Kathleen Lonsdale, in the mid-1950s or earlier it was known that strontium 90 is taken up particularly easily by children, that it causes bone tumors, and that "according to the British and American official reports, some children in both countries have already accumulated a measurable amount of radioactive strontium in their bodies."
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