查询词典 rare earth element

The effect of rare earth-element lanthanum and copper on micronuclei and nuclear anomalies in erythrocyte s of H.

研究了稀土元素镧与铜离子单独或联合作用时，对鲹鲦红细胞微核及核异常的影响。

Through analyzing the distribution characteristics and geochemical behaviors (such as macroelement, rare earth element and microelement) of volcanic rock here, structural transformation characteristics of Jiyang-Changwei depression in Cenozoic are studied using new geochemical theories and principles.

通过对火山岩分布特征、常量元素、稀土元素、微量元素地球化学特征分析，运用新的地球化学理论和原理，探讨了济阳-昌潍坳陷新生代构造转换特征。

Based on the complexity of the sources for the sediments in the Okinawa Trough, the sequential extraction procedure was applied to the hydrothermal influenced sediments in the core H9 recovered from the middle Okinawa Trough. Five fractions, including exchangeable, bound to carbonates, bound to iron and manganese oxides, bound to organic matter, and residual were acquired. Based on detailed analysis for major, minor and rare earth element compositions, the distributions of the elements in various speciations of the sediments were determined and the controlling mechanism was discussed. The variations of hydrothermal signatures in the core, partitioned from the terrigenous, volcanic and biogenic materials, have been demonstrated and the accumulation rates of some elements were evaluated.

本文针对冲绳海槽多种物源沉积作用混杂的特征，采用顺序淋滤萃取方法对海槽中部受热液活动影响的H9岩芯沉积物进行了分离，将沉积物中分为可交换态、碳酸盐结合态、铁锰氧化物结合态、有机结合态和残渣态五个部分，并对各个结合态中常量、微量和稀土元素组成进行了分析，确定了不同元素在不同结合态中分配的比例，分析了控制不同元素进入沉积物的主要机制。

Rare earth element tracer method was used to study sheet erosion changing to rill erosion on slope land.

中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室，陕西杨凌712100

By means of the Miedema formation energy model for binary system with the Tanaka modification by excess entropy and the Chou geometric model for ternary system, the interaction relation between rare earth element La and the constituent elements of Sn Pb alloy system was analyzed.

传统的Sn60 Pb4 0软钎料合金中添加微量稀土元素La( 0 0 2 4 %)，显著抑制了其显微组织中围绕先析出富Pb相的粗大的富Sn相晕圈的形成，实现了金属学组织的均匀化，并进而提高软钎料合金的高温拉伸强度 70 % [1] 。

Several conclusions are drawn from the study. The ore deposit mainly occurs in the lower Cambrian Shuigoukou Formation, which is situated at the limbs of Qingshixia-Yujiatai overturned multiple syncline. The ore-hosted rocks are silicalite and mudstone. The content of SiO2 is high in the rocks of V ore deposit. Silicalites are mainly aphanitic quartz and chalcedony and the barite is sedimentogenic. The correlation between V and Cr, U, Ba is good. The rare earth element distribution patterns show Ce-negative or positive anomaly, obviously Eu positive anomaly and the right dip graphics.

研究结果表明，该区钒矿主要产出于青石峡－余家台倒转复式向斜两翼下寒武统水沟口组下岩段硅质岩夹泥岩的泥岩中，矿体产状与地层产状基本一致；钒矿床中所有岩石都含有较高的SiO2，硅质岩以隐晶质石英和玉髓为主，有沉积成因重晶石；V与Cr、U、Ba相关性好；稀土元素球粒陨石标准化模式具有或正或负的Ce异常和明显的Eu正异常、向右倾的图形。

This paper presents the newest research results on rare earth element additives to chrome plating in chromic acid bath.

对稀土镀铬添加剂的最新研究成果进行了系统的介绍，并就目前应用情况，阐述了今后研究工作中需要进一步探讨的问题。

5The distribution patterns of rare earth element compositions in the hydrothermal components are similar to that of pacific seawater. This infers the complex and significant interactions of hydrothermal fluid with surrounding seawater during its diffusing process. Dissolved trace metals in the hydrothermal fluid can be removed by settling terrigenous or biogenic particulates and precipitated quickly from the hydrothermal plume round the vent. On the other hand, hydrothermal particulates would also scavenge some elements from the seawater to coprecipitate into the sediments.

5岩芯沉积物中热液源组分携带的稀土元素组成具有类似海水的分布模式，反映了热液流体喷出海底后与其它物源物质之间的复杂的相互作用：一方面大量生物和陆源碎屑物质的快速沉积导致溶解态的热液源物质被快速清扫，无法向外扩散，快速堆积在热液喷口附近；另一方面，随热液羽状体向外扩散的颗粒态热液源物质也清扫海水中的元素共同进入沉积物。

The paper studied the application of rare earth element La in grafted watermelon production.

为稀土元素La在嫁接西瓜生产上的应用提供理论依据。

In order to solve the important and basic problem of the petrogenesis of "Tiantangzhai migmatitic granite" in the core of Dabie orogenic belt, the detailed 1∶50000 regional geological surveying and the big scale dissection of important region (metamorphic rocks, granites and structure), were operated in about 900km〓 area near Tiantangzhai peak. On the bases of the petrology, mineral chemistry, geochemistry of rare earth element and microelement, isotope geochemistry and chronology, physicochemistry, magmatic dynamics, geodynamics, diagenetic simulation, and regional geophysical data, the theory of cooling age and historical geochemistry and the viewpoint of tectonic evolution are applied to study the petrogenesis of Yanshan epoch granites of this region. On the bases of above studies, the process of tectonomagmatic dynamics after indo-Chinese epoch in Dabie orogenic belt is discussed. The important conclusions are gotten

本文针对大别造山带核部&天堂寨混合花岗岩&成因这一重大基础地质问题，在天堂寨一带近900km〓的面积上进行了详细的1∶5万区域地质调查和大比例尺重点区解剖，通过对区内燕山期花岗岩进行岩石学、矿物化学、稀土微量元素地球化学、同位素地球化学和年代学、物理化学、岩浆动力学、地球动力学和成岩计算机模拟等研究的基础上，结合区域地球物理学资料，应用冷却年龄、历史地球化学理论和构造演化观，阐明区内燕山期花岗岩成因，并以此为基础进一步讨论了大别造山带自印支期以来的构造—岩浆动力学过程，取得了如下的重要认识

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了