铀
- 名uranium
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一种放射性元素。能放射出α、β和γ射线,在自然界中分布极少,主要用来产生原子能。
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{化} (放射性金属元素) aranium (U):
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低浓缩铀
low-enrichment uranium;
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裂变铀
fissioning uranium;
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浓缩铀
enriched uranium;
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天然铀
native uranium
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铀用作核电厂的燃料。
Uranium is used to fuel nuclear plants .
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浓缩铀是核武器的关键组成部分。
Enriched uranium is a key component of a nuclear weapon
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可世界上许多地区都有相当数量的铀储量。
Uranium is available in considerable quantity from various areas of the world .
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铀可溶解于海水。
Uranium is soluble in sea water .
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要避免使用那种非专用的同位素成分的铀化合物。
It is important to avoid the use of uranium compounds of unspecified isotopic composition .
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该理论认为,来自凝灰岩的地下水淋蚀铀
The concept holds that uranium is leached by groundwater from tuffeceous rocks .
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P(350)微孔快速色谱柱分离富集铀的性能研究
Studies on Properties of Tiny Decompressed Column Chromatography in Separation and Enrichment of Trace Uranium
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作为对比样的贫铀表面Al涂层则表现为粘着磨损行为,抗磨损性差。讨论了贫铀表面涂层的腐蚀和磨损行为。
The corrosion and abrasion behaviors of all coatings are discussed .
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铀表面Cu、Ni-P/Cu镀层研究
Study on Ni-P / Cu Coatings on U substrates
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同位素源X射线荧光法对高放废液中铀的分析
Analysis of u in the high-level liquid waste by isotopic source exciting X-ray fluorescence spectrometry
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铀矿物和含铀矿石中铀价态比值的X射线光电子能谱分析
Analysis of valence state ratio of uranium in uranium minerals and uranium-bearing ores by X-ray photoelectron spectrometry
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当铀的浸出率最低时为8.12%,残渣中铀含量为100.0mg/kg,不超过排放标准。
While the uranium content of residue is 100 mg / kg when the leaching rate is 8.12 % .
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端视ICP-AES测定铀化合物中的40种微量杂质元素
Determination of forty trace elements in uranium compounds by end-on viewed ICP-AES
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华南火山岩及铀成矿相关的Sr,Nd,Pb同位素演化规律研究
Research on evolutionary laws of sr , nd , Pb isotopes of uranium metallization and volcanic rocks in South China
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大量铀溶液中~(237)Np含量的γ谱法测量
The Determination of ~ ( 237 ) Np in the Large Amount of Uranium Solution by γ - spectrum
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铀表面Al-Zn镀层的结构和保护性能
Correlation between Al-Zn Coatings Structure and Its Protection for Uranium
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用离子交换法从铀中分离钍-234(UX1)的初步结果
Seperation of th-234 ( ux_1 ) from uranium by ion exchange method
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激光荧光法测定ADU及AUC化工工艺过程中痕量铀
The Determination of Trace Uranium in the ADU and AUC Processing by Laser Fluorescence
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分别用扫描电镜、X射线衍射仪和应力分析仪研究了5种不同偏压的施加对铀上磁控溅射铝镀层微结构和残余应力的影响。结果表明,偏压强烈影响镀层的组织。
Influence of different bias voltages on microstructures and residual stress of aluminum coatings is investigated by scanning electron microscope ( SEM ) , X-ray diffraction ( XRD ) and X-ray stress analyzer , respectively .
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关于季铵盐萃取铀的多核萃合物(R4N)2U3O(10)的研究
Study on polynuclear complex of uranium ( r_4n ) _2u_3o_ ( 10 ) in extraction by quaternary ammonium salt
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采用盐雾腐蚀和磨损试验考核,结合SEM/EDS和XRD表征,分析了贫铀表面Al2O3/Al复合涂层的保护性能。
Protection of Al2O3 / Al multi-layer coatings for depleted uranium was investigated by using a combination of 5 % NaCI salt fog and abrasion test with SEM / EDS and XRD profiles .
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Barbados岛珊瑚礁高精度铀系年龄及讨论
The conventional island high precision dating and discussion of coral reefs from Barbados with U series method
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HCD中铀基态原子衰变时间常数和亚稳态原子寿命测量
Measurement of decay time constant of ground and metastable states of U atoms in a HCD lamp
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狗急性铀中毒和用Tiron急救治疗
Curative effects of Tiron on dogs with acute uranium intoxication
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如果将pH控制在3.0左右,热溶液中加入微过量的棓酸以沉淀钍,经过两次沉淀可将钍与铀定量的分离。
Therefore thorium can be precipitated from the hot solution at about pH 3 in the presence of slight excess of the reagent . However , twice precipitating is required and the two elements can be separated quantitatively from each other .
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结果表明:金属铀表面经CO处理后的抗氧化能力有所提高,抛物线氧化阶段其氧化速率比未处理样品的氧化速率低25%~60%;
The result indicated that the oxidation resistance in dry air at 70 ℃ is improved after reaction of uranium with CO , and its oxidation rate is 25 % ~ 60 % lower than that of fresh uranium at initial stage of oxidation ;
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断裂构造高频等值线星团是构造活动最强烈的地区,是成矿溶液活动的场所,地球化学梯度(pH,Eh)变化大,有利于铀成矿。
Those areas covered by fracture structure frequency isopleth clusters represent the intense tectonic active areas and the ore-forming solution active places , where geochemical gradiants ( pH , Eh ) change in a wide range that is favourable for uranium metallization .
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铀酰在乙酸盐体系中于D-290树脂上的交换行为
Ion Exchange Behaviour of Uranyl in Solution of Acetate onto D-290 Macroporous Resin
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本文扼要介绍了加拿大萨斯喀彻温省北部比弗洛支地区脉型(veintype)和阿萨巴斯卡盆地中与不整合面有关的(Unconformityassociated)铀资源概况;
This paper briefly introduces uranium resources of unconformity associated uranium mineralization in Athabasca basin and vein type uranium mineralization in Beaverlodge area , Northern Saskatchewan , Canada , and systematically expounds common metallogenic characteristics of the above two types of uranium mineralization .
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岩石的U-Ra平衡系数研究表明,火山岩类存在明显的U-Ra不平衡现象,而花岗岩提供成矿铀源应发生在16000a以前。
U-Ra equilibrium coefficients of rocks indicate that there is obvious U-Ra disequilibrium phenomenon in volcanic rocks , and the time when granites provided uranium source occurred 16000 a ago .