thorium


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thorium

 [thor´e-um]
a chemical element, atomic number 90, atomic weight 232.038, symbol Th. (See Appendix 6.)
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

tho·ri·um (Th),

(thō'rē-ŭm),
A radioactive metallic element; atomic no. 90, atomic wt. 232.0381. 232Th, the only naturally occurring nuclide, with a half-life of 14 × 109 years, is used in colloidal form in electron microscopy as a stain for acid mucopolysaccharides.
[Thor, Norse god of thunder]
Farlex Partner Medical Dictionary © Farlex 2012

tho·ri·um

(Th) (thōr'ē-ŭm)
A radioactive metallic element; atomic no. 90, atomic wt. 232.0381. 232Th, the only naturally occurring nuclide, with a half-life of 14 × 109 years, is used in colloidal form in electron microscopy as a stain for acid mucopolysaccharides.
[Thor, Norse god of thunder]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Under the terms of the deal,managers of Yates will take an 18.6% stake in Thorium's parent company,Holmium.
PULMOBRANCHIATES has ARSENIC, BARIUM, BISMUTH, BOHRIUM, BROMINE, CARBON, CERIUM, CESIUM, COBALT, ERBIUM, HELIUM, IRON, NOBELIUM, PLATINUM, RHENIUM, TERBIUM, THORIUM and TIN One letter longer and with 2 more elements is this 20-element 17-letter solution:
This idea has also been around in theory since the early 1950s; it gained renewed currency in 1993, when Nobel Prizewinning physicist Carlo Rubbia proposed an "energy amplifier," an accelerator-driven subcritical reactor (ADSR) that coupled a particle accelerator to a reactor core containing thorium, depleted uranium, or other mildly radioactive materials.
'We cannot accept this and we will continue to fight for our safety and that of future generations' since thorium has a 14 billion year half-life.
Thorium reactors destroy plutonium so decommissioning costs are a fraction of those from a uranium fuelled reactor.
Plans include as many as 30 new conventional nuclear plants (in addition to the 34 reactors operating today) as well as a variety of nextgeneration reactors, including thorium molten-salt reactors, high-temperature gas-cooled reactors (which, like moltensalt reactors, are both highly efficient and inherently safe), and sodium-cooled fast reactors (which can consume spent fuel from conventional reactors to make electricity).
We don't have huge deposits of uranium, but we have the largest reserve of thorium in the world, and we're developing thorium-based reactors which are completely unique and home-grown.
The Welsbach Company and the General Gas Mantle Company used radioactive material thorium from the late 1890s to 1941 to make the gas lamps manufactured at the facilities glow brighter.
Michael Mallinson, 43, from Kirkburton won the inaugural Thorium Throwdown CrossFit competition for Masters athletes in Peterlee near Durham.
This could be mixed with thorium and U-238 in various proportions and used by the UK in its own programme to develop a molten salt reactor.
(8) The radioactive material in Mexico was rapidly recovered by Mexican security forces and its theft was attributed to "common crime and not related to terrorism." (9) In Iraq, however, the state does not control the nearly 40 kilograms (88 pounds) of uranium or 0.125 kilograms (0.28 pounds) of thorium stolen from the University of Mosul, and the thieves are part of a known terrorist organization.