查询词典 speculum metal

The anion-exchange ion chromatography is suitable for the separation and analysis of alkaline earth metal ions, transition metal ions and rare earth metal ions.

综述了离子色谱法分析金属离子的研究进展，对目前应用于分析金属离子的阳离子交换IC、阴离子交换IC和螯合离子色谱进行了评述。

Miniaturization of hydroxide of alkaline-earth metal and solubility of salt, flame reaction of alkaline-earth metal ions, separation and identify of alkaline-earth metal ions was investigated.

系统探讨碱土金属氢氧化物及其盐的溶解性、碱土金属元素的焰色反应、碱土金属离子的分离和鉴定等微型化实验，并将其设计成新的微型实验应用于无机化学实验教学，效果良

The effect of alkaline metal, alkaline-earth metal or rare-earth metal oxides doping to Pd/γ-Al〓O〓 on the properties of supported palladium catalysts were investigated.

研究含氧条件下单Pd催化剂上进行丙烯选择催化还原NO的反应，考察浸渍法制备的Pd/γ-Al〓O〓催化剂中加入碱或稀土金属氧化物助剂对NO转化率的影响，并对催化剂进行了XRD表征及在氧化气氛中饱和吸附NO后的TPD研究。

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

As the main part of the Qinling orogenic belt which has been undergone all tectonic movements after Archeozoic, the Western Qinling region has a complex tectonic evolution history and are abundance of noble metal, non-ferrous metal and ferrous metal mineral resources.

西秦岭作为秦岭造山带的重要组成部分，经历了自太古宙以来的多期造山构造运动，是具有复杂的构造演化史地复合造山带。复杂的地质构造演化和蕴含丰富的贵金属、有色与黑色金属矿产是西秦岭造山带的主要特征。

The thesis introduced the procedure of synthesizing L-aspartic acid metal complex and aspartame metal complex with the raw material of L-aspartic acid、aspartame and metal elements iron、zinc、autunite、coppe.

本论文主要进行了L-天门冬氨基酸、阿斯巴甜与金属元素铁、锌、钙、铜的合成研究。

It contains metal; or it is grown or manufactured by the aid of metal; or it will be consumed with the help of metal.

有的产品本身就含有金属；有的产品是借助金属才得以发展或制造出来的；而有的产品的消耗也要借助于金属。

The Product Is Suitable for separating the granularity is 0.3-0.02mm of the iron ore,limonite,chromites,trotline,zirconium,retiles,monazite,centimes,wolfram ore,Stan nary,tantalum minerals,niobium minerals and other non feerous metal,rare metal and non metal.

本设备适用于分选粒度0.3--0.02毫米细料的铁矿、钛铁矿、铬铁矿、硫铁矿、锆英石、金红石、独居石、磷乙矿、钨矿、锡矿、钽矿、铌矿以及具有比重差异的其他有色金属、稀有金属和非金属矿物体。

A white metal straight-winged spread eagle and swastika emblem was pinned to the front of the crown; below it on the band was a white metal oak leaf wreath surrounding a raised, painted metal cockade.

白色金属直翅鹰和纳粹党徽标志的传播是挂在前面的冠，低于它在一个白色的金属乐队金属帽章橡树叶花环环绕着提高，画。

In the titration experiment of NMR and IR spectroscopy, we can understand how sensors binding with metal ions: the two carbonyl group and crown ether group cooperated in binding with metal ions. Furthermore, by altering the "oxygen" atoms of crown ether to "sulfur", we can change the binding affinity to the soft metal: cupper. It shows 60-fold enhancement of fluorescence.

在化合物2中，我们引进了硫原子在冠状醚中，则应对电子密度较低之金属有较好的结合能力，实验结果显示了此分子对铜离子有相当好的选择性和结合能力，萤光增加可达60倍；同时由红外光吸收光谱和核磁共振光谱滴定实验可确知，香豆素衍生物上的两个羰基对金属离子的选择性及结合上扮演相当重要的角色。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。