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- active potassium dating method 放射性钾定年代法
- Fluoroaniline is synthesized in two steps from p-nitrochlorobenzene and active potassium fluoride. 以对氯硝基苯和活性氟化钾等为原料,经二步法合成了对氟苯胺。
- The second dating method was palaeo-magnetic analysis, or magnetic polarity stratigraphy. 第二种测定法是古磁学分析法，也叫磁极地层学测定法。
- K Ar and Ar Ar dating is one of the best dating method to Mesozoic Cenozoic volcanic rocks. Appropriate size and preprocessing procedure are important for the method to get good data. K Ar和Ar Ar法是中、新生代火山岩最有效的测年方法之一 ,合适的粒度和有效的预处理程序对于提高年龄资料的质量至关重要。
- The 14C age dating method was applied to study the deposited age of the Jiangbei conglomerate in Youxi profile,Jiangjin. The geochemical characteristics of oxides such as MgO,CaO,Fe2O3,FeO,Fe2O3/FeO were analyzed. 本研究采用14C法对江津油溪剖面江北砾岩胶结年代进行测定;用滴定法和原子吸收光谱仪对填隙物的Fe2O3、FeO、CaO、MgO及Fe2O3/FeO变化特征进行了分析.
- The longer transportation distance of the fluvial deposits facilitates the bleaching and increases the reliability of the luminescence dating method, especially for the young material. 当然是愈是年轻的标本，较长的搬运距离愈是可以增加被晒退的机会，当然也会增加萤光定年法的可信度。
- In practice,reaction extrusion is a new trend in the extrusion technology.The multiscrew extruder based on co rotating twin screw extruder is an up to date method. 在实验上，反应挤出技术代表了双螺杆挤出机开发的趋势，在此基础上的多螺杆技术是该领域的新发展。
- The geologic dating methods, which include the paleontology method, archeomagnetism method, and isotopic method, present absolute ages or relative ages of geologic events. 前人已建立的地质定年方法(同位素法、古生物法和古地磁法)给出的是地质事件的“绝对年龄”或“相对年代”。
- U-Pb and Pb-Pb dating methods have been used to determine the age of H8 dolomite in Bayan Obo Ore Deposit. 采用U Pb和Pb Pb方法研究了内蒙古白云鄂博赋矿H8白云岩的年代。
- The results of all these dating methods and fossil geochronometry should be contrasted each other. 与蛇绿岩形成、演化相关的各地质事件发生的时间可以对蛇绿岩的形成时代进行约束。
- Using radiometric dating methods, Sugden determined that the ash settled into the fissure after a volcanic eruption 8.1 million years ago. 使用放射性断代法，苏格丹发现火山灰早在810万年前的一次火山喷发后，就已进入了裂缝。
- No potassium did we find in this mineral. 在这种矿石中我们没有发现钾。
- fluorine-uranium-nitrogen-test dating method 氟负氮测年法
- The orient has been playing an active role in the world economy. 亚洲一直在世界经济中发挥积极作用。
- Calcium activated potassium channels 钙激活钾通道
- thermoluminescence dating method 热光测年法
- Calcium - activated potassium channels 钙激活钾通道
- He is an active member of the school's stamp club. 他是学校集邮俱乐部的一名活跃会员。
- Calcium- activated potassium channels 钙激活钾通道
- The high precision dating methods,such as,Re-Os dating of sulphide and ~(40)Ar-~(39)Ar dating of sericites are proposed to date this type of gold deposits. 提出了利用硫化物Re-Os法;热液绢云母40Ar-39Ar法等直接精确测定热液矿物年龄以获得成矿年龄的方法和可能途径.
