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As 99.9% pure thorium oxide, price per thorium contained. Free on Board port of entry, duty paid. 91: Pa: Protactinium: 15.37: 1.4×10 −6 [i] (3.878 × 10 10 kg) No reliable price available. In 1959–1961 Great Britain Atomic Energy Authority produced 125 g of 99.9% pure protactinium at a cost of $ 500 000, giving the cost of 4 000 000 USD ...
For instance, the heavy water used in CANDU reactors is a highly enriched water mixture that is mostly deuterium oxide D 2 O, but also some hydrogen-deuterium oxide and a smaller amount of ordinary water H 2 O. It is 99.75% enriched by hydrogen atom-fraction; that is, 99.75% of the hydrogen atoms are of the heavy type; however, heavy water in ...
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Girdler sulfide process. The Girdler sulfide (GS) process, also known as the Geib–Spevack (GS) process, [1] is an industrial production method for filtering out of natural water the heavy water (deuterium oxide = D 2 O) which is used in particle research, in deuterium NMR spectroscopy, deuterated solvents for proton NMR spectroscopy, in heavy water nuclear reactors (as a coolant and ...
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Thus, deuterium accounts for about 0.0156% by number (0.0312% by mass) of all hydrogen in the ocean: 4.85 × 10 13 tonnes of deuterium – mainly as HOD (or 1 HO 2 H or 1 H 2 HO) and only rarely as D 2 O (or 2 H 2 O) (Deuterium Oxide, also known as Heavy Water)– in 1.4 × 10 18 tonnes of water.
However, deuterium (the second label in the doubly labeled water) is lost only when body water is lost. Thus, the loss of deuterium in body water over time can be used to mathematically compensate for the loss of 18 O by the water-loss route. This leaves only the remaining net loss of 18 O in carbon dioxide. This measurement of the amount of ...
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