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Nuclear Transmutation03:20

Nuclear Transmutation

Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed protons being...

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Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce (Lactuca sativa) Germplasm Collections
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1959年美国小麦作物中的-90

T A OLSON

    Science (New York, N.Y.)
    |March 23, 1962
    PubMed
    概括

    分析了1959年美国小麦作物的-90水平. 虽然总体上与其他研究一致,但俄克拉荷马州小麦样本显示-90度最高.

    科学领域:

    • 环境科学 环境科学
    • 农业科学 农业科学
    • 放射化学 放射化学是指辐射化学.

    背景情况:

    • 放射性同位素如-90 (Sr-90) 可以污染农产品.
    • 在主食作物中监测Sr-90水平对于评估潜在的饮食暴露至关重要.

    研究的目的:

    • 分析了1959年美国小麦作物中90的存在和分布.
    • 将发现与有关食品中放射性污染的现有数据进行比较.

    主要方法:

    • 1959年美国小麦收获的广泛采样.
    • 放射化学分析以量化小麦样本中的-90度.

    主要成果:

    • 在分析的小麦样本中检测到90.
    • 总体水平与之前的调查一致.
    • 来自俄克拉荷马州的小麦样本显示了-90的最高度.

    结论:

    • 1959年美国小麦作物中含有90,但观察到区域差异.
    • 在此期间,俄克拉荷马州是小麦中较高的90积累的焦点.
    关键词:
    农业 农业 农业 农业斯特伦/放射性物质的使用.麦子 麦子 麦子

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