助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   土元素 的翻译结果: 查询用时:0.146秒
图标索引 在分类学科中查询
所有学科
化学
更多类别查询

图标索引 历史查询
 

土元素
相关语句
  earth elements
     THE SEPARATION OF RARE EARTH ELEMENTS IN THE SYSTEM OF CH_3OH-LiNO_3-HNO_3-DTPA-ANION EXCHANGE RESIN
     CH_3OH-LiNO_3-HNO_3-DTPA-阴离子交换树脂分离希土元素
短句来源
     ON THE SEPARATION OF RARE EARTH ELEMENTS BY MEANS OF REVERSE-PHASE PAPER CHROMATOGRAPHY Ⅰ. THE HDEHP-Na_2SO_4 SYSTEM
     希土元素之纸条反相分配层析法分离——Ⅰ.HDEHP-Na_2SO_4体系
短句来源
     INVESTIGATION OF SYNERGISTIC EXTRACTION MECHANISM OF RARE EARTH ELEMENTS(Ⅲ) WITH HEHEHP AND PMBP
     HEHEHP与PMBP协同萃取希土元素(Ⅲ)的机理研究
短句来源
     STUDIES ON REDOX PROPERTIES AND STABILITY OF 1: 12 HETEROPOLY COMPLEXES WITH RARE EARTH ELEMENTS
     希土元素1:12系列杂多配合物的氧化还原性和稳定性质研究
短句来源
     When using ~(148)Nd method in burnup determination,to obtain real value ofburnup determination,the interference from natural rare earth elements Nd,Ceand Sm to the value of Nd must be concerned.
     用~(148)Nd 法测定核燃料燃耗时,来自天然钕、天然铈,天然钐等希土元素对裂变产物钕测量的干扰必须认真考虑,以便求得真实的燃耗值.
短句来源
更多       
  “土元素”译为未确定词的双语例句
     STUDIES OF THE RARE EARTH COORDINATION COMPOUNDS—— Ⅷ.SYNTHESIS AND CHARACTERIZATION COMPLEXES OF RARE EARTH WITH 1,4-BIS-(1'-PHENYL-3'-METHYL-5'-PYRAZOLONE-4')-1,4-BUTANEDIONE
     希土配合物的研究——Ⅷ.1,4-双(1’-苯基-3’-甲基-5’-氧代吡唑酮基-4’)代-1,4-丁二酮(BPMPBD)与希土元素配合物的合成及表征
短句来源
     THE RESEARCH OF THE DETERMINATION INTERFERENCE FROM RARE ELEMENTS FOR FISSION PRODUCT ~(149)Sm
     烯土元素干扰裂变产物~(149)Sm测定的研究
短句来源
     SYNERGISTIC EXTRACTION OF RARE EARTH IONS(Ⅲ) BY HPMBP AND PRIMARY AMINE N_(1923)
     HPMBP与伯胺N_(1923)对希土元素(Ⅲ)的协同萃取
短句来源
     We have made the measurements of the extraction coefficients ofthe rare earths (La,Ce,Pr,Nd,Sm, Eu, Gd) with di-sec-octyl methylpho-sphonate (P-350) at 17°, 25°, 33°, 41°, 49℃. From these resulisthe enthalpy,relative free energy and enthopy changes associated with the extractionprocess have been calculated and discussed.
     测得17、25、33、41、49℃下甲基膦酸二仲辛酯(P-350)萃取希土元素(La、Ce、Pr、Nd、Sm、Eu、Gd)的分配系数,从其结果计算了萃取过程的焓及其相对吉氏函数和熵变,并进行讨论。
短句来源
     Twenty-four complexes of transition-metal (Cr, Fe, Cu, Mn, Co, Ni) nitrate and chlorides with 12-crown-4, 15-crown-5, 18-crown-6 had been prepared.
     碱金属、碱土金属、希土元素、锕系元素的阳离子与冠醚形成配合物的报导已有许多,但过渡金属Mn、Co、Ni、Cu的二价阳离子与冠醚形成配合物的报导却很少,而且不成系统,还未见到Fe~(3+)、Cr~(8+)与冠醚形成配合物的报导。
短句来源
更多       
  相似匹配句对
     Most elements were relatively enriched in soil forming process.
     多数元素在成过程中富集;
短句来源
     PREPARATION OF RARE EARTH TARGETS WITH MOLECULAR PLATING
     分子电镀法制备希元素
短句来源
     Elementoorganic Chemistry
     元素有机化学
短句来源
     Nucleosynthesis of Elements
     元素核合成
短句来源
     Investigation the Specific Gravity of Soil
     的比重研究
短句来源
查询“土元素”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  earth elements
Research results of the rare earth elements reveal that these cherts formed in a relatively deep-water basin with no significant terrestrial interference.
      
Total rare earth elements (REE) contents of the rocks increase gradually and negative Eu anomalies become more obvious from Precambrian to Triassic, which may indicate intensifying crustal anatexis.
      
Characteristics of rare earth elements of lacustrine exhalative rock in the Xiagou Formation of Lower Cretaceous in Qingxi sag,
      
Extraction of rare-earth elements under the action of vibrations on the dynamic interfacial layer in systems containing di-(2-et
      
Sol-Gel synthesis of an optical silica glass doped with rare-earth elements
      
更多          


In the present paper, a comparatively simple spectrochemical method for thedetermination of rare earth elements and thorium in their mixtures is described.The method takes the advantage of combined chemical and spectrographic proce-dure. The rare earths and thorium mixture is separated chemically from the mi-nerals. The cerium oxide content is determined volumetrically and then raised to80.0% by adding pure cerium compound, according to the method proposed byFassel. A drop of the resulting chloride solution...

In the present paper, a comparatively simple spectrochemical method for thedetermination of rare earth elements and thorium in their mixtures is described.The method takes the advantage of combined chemical and spectrographic proce-dure. The rare earths and thorium mixture is separated chemically from the mi-nerals. The cerium oxide content is determined volumetrically and then raised to80.0% by adding pure cerium compound, according to the method proposed byFassel. A drop of the resulting chloride solution is introduced to the flat top of agraphite electrode, which has been treated previously with a drop of liquid paraffin.The electrode is dried on a hot plate and excited in an activated A. C. arc. Spec-tral line pairs for the determination of La, Nd, Sm, Pr, Y, Gd, Dy, Yb and Erhave been selected in the region 3, 500--4, 500 A, while that of thorium falls inthe ultraviolet region. Cerium is used as internal standard. The root mean squaredeviations of a single determination vary from 2.9 to 8.8% for different elements.The linearity ef the working curves, obtained from a series of widely varyingstandard samples, and the results of rare earths and thorium for monazite showthat the present methed is free from line interference and systematic errors. Comparison has been made with regard to the vaporization characteristics ofthe rare earth oxides and thoria in the carbon D. C. are and their chlorides onthe surface of graphite electrode in the A. O. are. The effects of chlorides, nitra-tes and snlfates on the line intensity of the rare earths in the latter case havealso been observed.

本工作用化学处理与光谱分析的操作制订一较简单的分析法,适用于测定以铈组为主的希土混合物中个别组分的含量。根据Fassel的方法,希土元素及钍从矿石中用化学方法分离后,以容量法测定铈,再加入纯铈,提高氧化铈含量至80.0%。所得之混合氯化物溶液加到经液体石腊处理过的碳电极上,在电热板上干燥后,用活化交流电弧作激发光源在3,500—4,500A波段内摄谱,进行La,Nd,Sm,Pr,Y,Gd,Dy,Yb及Er的含量测定。钍在紫外摄谱。单次摄谱的均方误差在2.9—8.8%间。根据用含量变动范围较大的标准试料所作的工作曲线以及本法具体应用于独居石中希土及钍的混合物的分析结果,说明本法中没有元素互相干扰以及系统误差。此外,在工作中还比较希土元素粉末试料在直流碳电弧中及其氯化物溶液在碳电极表面上干燥后在交流电弧中的蒸发特性,并观察希土氯化物,硝酸盐及硫酸盐在后一光源中对谱线强度的影响。

A rapid method for the determination of thorium in cassiterite containing tungsten is suggested. The method gives satisfactory results and is fairly rapid. An analysis of ore sample can be completed in a working day. The prodecure is essentially as follows:The sample is fused with sodium peroxide and the fused mass extracted with water. The water-insoluble residue is dissolved in hydrochloric acid and thorium is precipitated as the oxalate with cerous oxalate as a carrier. After solution in nitric acid and decomposition...

A rapid method for the determination of thorium in cassiterite containing tungsten is suggested. The method gives satisfactory results and is fairly rapid. An analysis of ore sample can be completed in a working day. The prodecure is essentially as follows:The sample is fused with sodium peroxide and the fused mass extracted with water. The water-insoluble residue is dissolved in hydrochloric acid and thorium is precipitated as the oxalate with cerous oxalate as a carrier. After solution in nitric acid and decomposition of oxalic acid, thorium is determined colorimetrically with arsenazo in the presence of ascorbic and tartaric acids according to Zaikovsky and Gerkhardt.

测定钨锡矿中少量钍时,试样用过氧化钠熔融,沉淀溶于盐酸后,在酸度为0.3N时, 利用Na~+与希土元素的存在降低草酸钍的溶解度,用草酸铈作载体使钍以草酸钍形式沉淀并与大量Zr、Ti、Fe等元素分离。破坏草酸后,在pH(?)2时利用抗坏血酸掩蔽Fe、Ti,用酒石酸掩蔽Zr,用显色,进行比色测定。此法操作简便,只须一天便可完成全部分析。

Adding small amount of rare earth elements in alloy steel will improve its certain mechanical

木文中介绍了利用经化学分离及浓缩的处理后再进行光谱测定的方法来分析合金钢中的微量希土元素。测定的灵敏度0.005%(合量)。误差±10%。此外还研究了利用中型色散的仪器测量钢中希土元素的可能性以及直接固体样品激发进行钢中希土元素分析的部题。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关土元素的内容
在知识搜索中查有关土元素的内容
在数字搜索中查有关土元素的内容
在概念知识元中查有关土元素的内容
在学术趋势中查有关土元素的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社