radioactivity 中文意思是什麼

音標 ['reidiəuæk'tiviti]
radioactivity 解釋
放射活動；放射強度
  1. The heat production in rocks due to radioactivity is highest in the acid rocks and lowest in the ultra-basic rocks.

    巖石的放射作用熱產率以酸性巖類最高，超基性巖類最低。
  2. We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium, by bombardment with alpha rays

    我們已經展示了人工放射現象的可能性，這種放射現象的特徵是用以射線轟擊用咄硼和鎂中的正電子或負電子。
  3. The atomic bomb is characterized by the grave injuries caused by radioactivity.

    原子彈具有由輻射引起嚴重損傷的特點。
  4. Our previous studies showed existence of apoplast cam in the plant cell and cam had many extracellular functions. so it supposed cam may be one of important extracellular polypeptides and trigger the intracellular signal transduction by binding the receptor. in this study, radiolabelled ligand is used to investigate the binding characteristic of cam and a. thaliana protoplasts. and chemical crosslinking is employed to explore binding proteins in the membrane. at first, ( 35 ) ~ s - cam was produced using ( 35 ) ~ s - labeled amino acid mixture in e. coli. sds - page and autoradiograph indicated high - purified, high - specific radioactivity ( 35 ) ~ s - cam was obtained. electrophoresis of ( 35 ) ~ s - cam is the same as that of unlabeled cam with ca ~ ( 2 + ) or egta ; a quatitive of protoplasts was prepared by enzymolysis

    首先，用~ （ 35 ） s標記的氨基酸混合物喂養工程菌成功地制備了~ （ 35 ） s標記的擬南芥鈣調素（ ~ （ 35 ） s - cam ） ， ~ （ 35 ） s - cam純度高、放射活度高、 ca ~ （ 2 + ）與egta存在時的電泳行為與未標記cam相同，可作為一種高靈敏性的探針用於進行受體學分析實驗；用擬南芥種子誘導愈傷，通過酶解制備了大量原生質體。
  5. Standard test method for beta particle radioactivity of water

    水的粒子放射性的標準試驗方法
  6. Cloud chambers are used for studying radioactivity

    雲室是用於研究放射活動的。
  7. Overburden had concealed the radioactivity.

    覆蓋層屏蔽掉了放射性。
  8. At the surface, radioactivity of the conglomerates is locally as high as 30 x background.

    在地表，礫巖的局部地段的放射性高達30倍本底值。
  9. The radioactivity of a sample is defined to be the number of disintegrations per unit time.

    樣品的放射性定義為每單位時間的蛻變數目。
  10. Radioactivity is the ejection of particles or radiation from the nucleus.

    放射性是原子從核中射出粒子或輻射的現象。
  11. The environmental engineer has an interest in nuclear chemistry as the radioactivity emanating from changes in unstable elements can result in hazards to health.

    環境工程師對核化學感興趣的是不穩定元素變化時放射出的放射性對人體健康的危害。
  12. The absorption of haematomas was assessed quantitatively by daily measurement of the radioactivity and compared intraindividually

    血腫的吸收通過每日定量地測定放射活性進行比較。
  13. Performance specifications for health physics instrumentation ; occupational airborne radioactivity monitoring instrumentation

    醫用儀器測試人體健康的性能規范.職業用空氣中放射性監視儀器
  14. Performance specifications for health physics instrumentation - occupational airborne radioactivity monitoring instrumentation

    健康醫療儀器的性能規范.職業性的空氣中放射性物質的監控儀器
  15. This type of long persistent phosphor has the advantages of innocuity, no radioactivity, high luminescence, long duration and no need of electricity, so it can be regarded as high efficiency solid display material

    它無毒、無放射性、亮度高、余輝時間長、不消耗電能，是一種高效節能的固體發光顯示材料。
  16. At the same time radioactivity injured the inner tissues of the skin and formed keloids on the surface of the skin.

    輻射力同時破壞組織，在表皮上形成瘢痕。
  17. After several days, the enclosed atmosphere was tested for radioactivity, which might indicate that the nutrients had somehow been metabolized.

    幾天之後，測驗封閉在裏面的空氣是否有放射性。如果有的話，說明營養物質多少已經產生代謝變化。
  18. It is shown that the radioactivity level of tin polymetallic ore, undressed ore and adjacent formation is affected by the strata and mineralization type, the radioactivity level of sulfide ore is not high as a whole, while that of tin ore generally is several times higher than the background value and that of debris and slag is also relatively high, whose impact on the environment is not neglectable

    錫多金屬礦原礦及圍巖放射性水平受地層與礦化類型影響很大，硫化礦整體放射性水平不高，砂錫礦卻普遍高出背景值數倍，尾礦、爐渣放射性水平也相對較高，對環境的影響不容忽視。
  19. Equipment for continuous monitoring of radioactivity in gaseous effluents - specific requirements for radioactive noble gas monitors

    氣態排放物放射性的連續監測設備.放射性惰性氣體監測器的特殊要求
  20. Equipment for continuous monitoring radioactivity in gaseous effluents - part 3 : specific requirements for radioactive noble gas monitors

    氣態排出流放射性連續監視設備.第3部分:放射性惰性氣體監視儀的特殊要求
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