1) major elements
主元素
1.
Supergenic geochemical characteristics of major elements in red soils in South China;
华南红土主元素表生地球化学特征
2.
The acid dissolution technique is characterized by low detect limit and available for measurement for all major elements but Si and ca.
报道了采用酸溶和碱熔分解硅酸盐岩石样品、用ICP-AES和ICP-MS联合测定岩石的主元素和微量元素的分析方法。
3.
The results of major elements analysis showed the contents of Al_2O_3,TOFE,CaO,MgO,K_2O,Na_2O and TiO_2 in fluvial-lacustrine facies and paleosols were apparently higher than that in paleo-mobile dune sands;contrary is the contents of SiO_2 for them;and thus these major elements constituted the similar half nine "element cycles".
主元素分析结果显示,该剖面MIS3层序中河流相、湖相和古土壤的Al2O3、TOFE、CaO、MgO、K2O、Na2O、TiO2含量明显高于古风成砂,而SiO2则相反,构成与沉积旋回相应的9。
2) major element
主元素
1.
The change cycles of major element in Salawusu River valley since 150 ka B.P.;
150 ka B.P.以来萨拉乌苏河流域主元素变动旋回
2.
Content variations of the major elements and their potential implications to pa-leoenvironment have been dealt with for the sediments of core 97--37 from the southernSouth China Sea, and an element--stratum series, which corresponds to the oxygen iso-tope strata series rather wel1, has been constructed based on the variation of MgO/Al2, O3,ratio.
探讨了南海南部97－37钻孔沉积物中主元素的含量变化特征及部分特征地球化学指标的潜在古环境意义，并建立了基于 MgO／Al2O3比值变化的元素地层序列。
3.
, major elements (including the trace element of Cr, Co and Ni) of 12 samples and rare earth elements (REE) of 7 samples are tested.
在岩石取心和岩石薄片不多的情况下，为了对本区火山岩准确定名，了解本区火山岩的地球化学特征以及岩浆的结晶分异等岩浆作用的形成和演化，对本区１２块火山岩的主元素分布（包括铬、钴、镍等微量元素分析）和７块火山岩的稀土元素进行了分析。
3) main elements
主元素
1.
Charicteristics of main elements and their palaeoenvironment significance of Core 191 in the northern South China Sea;
南海北部191柱状沉积物主元素特征及其古环境意义
2.
ICP-AES was used for the determination of main elements in silicon-aluminium-barium alloy.
利用ICP-AES法测定硅铝钡合金中主元素,通过对溶样方法、溶样时间、元素分析谱线和背景校正扣除的综合分析优化了测定条件。
3.
With orthogonal test, the relation of four main elements C, Cr, Mo, V and HRC,a k were mainly examined.
采用正交试验法，重点考察了Ｃ，Ｃｒ，Ｍｏ，Ｖ四种主元素与力学性能指标ＨＲＣ和ａｋ之间的关系。
4) principal element
主元素
1.
Two rules of determining the principal element in simplex method;
单纯形法中确定主元素的两个新法则
2.
The author discusses the necessary and sufficient conditions under which polynomial identities d G kk (AX)= d G kk (X), X∈M m(c) , where d G kk denotes matrix function derived from principal element of unitary matrix representation Δ of the group G , and G is a subgroup of the full symmetric group S m .
讨论多项式恒等式dGΔkk(AX) =dGΔkk(X) (dGΔkk常简记为dGkk) X∈Mm(C)成立的充要条件 ,这里G是m次对称群Sm 的子群 ;dGkk(A)是群表示Δ的主元素Δkk诱导的矩阵函
5) major element
主量元素
1.
Geochemistry of major elements from the Cretaceous Taoqihe Formation-Taipinglinchang Formation sandstones in the Sunwu-Jiayin Basin;
孙吴-嘉荫盆地白垩系淘淇河组-太平林场组砂岩主量元素的地球化学特征
2.
In this paper a method for the direct determination of the major elements(S,Cl,K,Ca)in brine sam- ples by the energy dispersive X-ray fluorescence spectrometry is reported.
用模拟卤水建立一套能量色散X射线荧光光谱法测定卤水中硫氯钾钙主量元素含量的方法。
3.
Major element characteristics of sandstones from different kinds of basin are a function of particular provenance types and tectonic environments, and provenance analysis of basins may be performed using major element diagrams.
一定的砂岩地球化学特征对应于特定的源区和构造环境,利用主量元素图解可以进行盆地物源分析。
6) main group element
主族元素
1.
The β2-isomer Keggin structure heteropolytungstoarsenate complexes containing main group elements have been prepared and characterized by ICP,UV,IR,XPS,XRD and 183W NMR.
合成了4种主族元素取代的钨砷杂多配合物,通过ICP和TG曲线确定其通式为:K11,12〔M(AsW11O39)2〕。
2.
The results show that the new compounds are of Keggin structure,and the main group elements have already entered into the skeletons of new compounds.
结果表明,新配合物具有典型的Keggin结构,且主族元素进入到配合物的骨架中。
补充资料：第Ⅰ主族元素
包括氢、锂、钠、钾、铷、铯和钫七个元素(见彩图)。其中只有氢是双原子分子组成的气体，主要显非金属性；其余六种元素都是固体，主要显金属性，通称碱金属。碱金属蒸气中大部分是单原子分子，只有少量双原子分子。氢和碱金属都是 s电子充填元素,外层电子同属ns1构型。金属氢的研制和锂键的发现，说明氢与碱金属元素还是相近的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条