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The strontium unit is a unit used to measure the amount of radioactivity from strontium-90, a radionuclide found in nuclear fallout, in a subject's body; as the human body absorbs strontium as if it were calcium, incorporating it into the skeleton, its presence is very common. One strontium unit is equal to one picocurie from strontium-90 per gram of calcium (37 becquerels per kilogram) in the subject's skeleton. The United States National Academy of Sciences holds that the maximum safe measure of strontium-90 in a person is one hundred strontium units (3700 Bq/kg). The average American is estimated to have three to four strontium units. The strontium unit was formerly known briefly as the sunshine unit,〔(【引用サイトリンク】url=http://www.merkle.com/pluto/pluto.html )〕 a term promoted by the United States Department of Defense until public ridicule brought about its disuse. (Among the sources of this outcry was a George Carlin performance, released on the CD ''Parental Advisory: Explicit Lyrics'', during a passage on governmental euphemisms for dangerous or unethical activities: "The Pentagon has actually begun measuring nuclear radiation in something they call 'sunshine units'!") ==See also== *Project GABRIEL *Project SUNSHINE *Banana equivalent dose 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Strontium unit」の詳細全文を読む スポンサード リンク
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