LYCOS RETRIEVER 
Strontium: Strontium-90
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Strontium is a trace element widely found in nature. It became famous in the 1960s when a radioactive form of strontium produced by atomic bomb testing, strontium-90, became prevalent in the environment. Nonradioactive strontium has recently undergone study as a treatment for osteoporosis, with some promising results.
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Strontium-90 is a byproduct of uranium fission, which collects in bones and other tissues. The RPHP is currently studying whether children with cancer have more strontium-90 in their teeth than other children.
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Strontium-90 is used as a radioactive tracer in medical and agricultural studies. The heat generated by strontium-90's radioactive decay can be converted to electricity for long-lived, portable power supplies. These are often used in remote locations, such as in navigational beacons, weather stations, and space vehicles.
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Strontium-90