actinium 在《牛津英西词典》中的词汇

词条actinium在西班牙语»英语中的译文

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单语范例(未经PONS编辑处理)

英语
Ac one tonne of ore contains about 0.2 milligrams of actinium.
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The actinide series derives its name from the group 3 element actinium.
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When actinium trichloride is administered intravenously to rats, about 33% of actinium is deposited into the bones and 50% into the liver.
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Secondary decay products of thorium include radium and actinium.
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This research resulted in the successful identification of a new element in the decay chain between uranium-235 and actinium, later named protactinium.
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Owing to its scarcity, high price and radioactivity, actinium has no significant industrial use.
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Polonium-208 and actinium-227 were also considered as alpha sources.
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The close similarity of physical and chemical properties of actinium and lanthanum makes separation of actinium from the ore impractical.
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Actinium-227 (half-life 21.8 years) in turn decays via thorium-227 (half-life 18.7 days) to radium-223.
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This reduced actinium accumulation in the bones, but the excretion from the body remained slow.
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