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technetium
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technetium

Silver-grey, radioactive, metallic element, atomic number 43, relative atomic mass 98.906. It occurs in nature only in extremely minute amounts, produced as a fission product from uranium in pitchblende and other uranium ores. Its longest-lived isotope, Tc-99, has a half-life of 216,000 years. It is a superconductor and is used as a hardener in steel alloys and as a medical tracer.

It was synthesized in 1937 (named in 1947) by Italian physicists Carlo Perrier and Emilio Segrè, who bombarded molybdenum with deuterons, looking to fill a gap in the periodic table of the elements (at that time it was considered not to occur in nature). It was later isolated in larger amounts from the fission product debris of uranium fuel in nuclear reactors.
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The recent transfer of the 7,500 homes heralded the start of a pounds 99m improvement programme to the former council houses.
Unions in agreement by Evening Gazette (Middlesbrough, England)
The technetium 99m pertechnetate scan is the standard test for making this diagnosis.
Gastrointestinal bleeding in adult patients with Meckel's ... by Shetzline, Michael A. / Southern Medical Journal
It has been on the acquisition trail for over a year now and as a result, CEO Jacques Altschul says he is confident in predicting revenue for this year of 99m euros already, and, with further acquisitions planned, he expects to achieve 152m euros ($164m) in 2000.
Focal Reports 98 Earnings Up 62% at $3.8m by Computergram International
 
 
 
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