酸根

The results show that quartz cannot react with oleic irons at pH=8-10, because it is difficult to combine with metallic irons. On the contrary, clinochlore can adsorb with oleic ions because there are enough active metallic positive ions between the minerals layers which can combine with clinochlore. The clinochlore can be hydrophobic, and so the separation can be realized finally. At pH=9, the clinochlore removal rate is the maximum, the purity of SiO2 is 99.86%, and the recovery of SiO2 is 35%.

结果表明：在pH为8~10的碱性溶液中，粉石英难与金属阳离子缔合，所以，不与油酸根离子结合；而斜绿泥石解离后层间存在活性金属阳离子，可与油酸根离子发生化学吸附产生疏水作用，因而使用反浮选的方法能有效地实现二者的分离：当pH为9时，斜绿泥石的去除率最高，粉石英的纯度达99.86%，回收率为35%。

A new photometric method for the determination of micro-amounts of bromate is proposed based on the oxidation of isatin by bromate in HC1 medium.

在盐酸介质中，依据溴酸根离子氧化靛红褪色的原理提出了测定溴酸根离子的新方法，研究了测定的最佳条件。

Using 1,3-dicyanobenzene as a precursor, we have obtained two coordination polymer of rare earth metal bridged by isophthalato ligand, Eu complex (4) and Sm complexe coordinated (5). X-ray single crystal diffraction investigation confirms that complex 4 and 5 are isomorphous with near isostructural 〓 unit.

以1，3-苯二氰为前体，合成了两个新的稀土金属与间苯二甲酸根配体桥联的聚合物：间苯二甲酸根配体配合的铕和钐化合物，4和5.X-射线衍射结构分析表明化合物4和5均具有〓基本结构单元且两者结构类似。

The competition research showed that HT was prefer to sorb phosphate than chromate. Sorb of chromate on HT decreased with increasing phosphate.

竞争实验结果显示HT溶液中含有少量磷酸根离子即可抑制铬酸根离子在HT上之吸附，但铬酸根离子对磷酸根离子之吸附影响并不大。

In this paper, the current research status on structural characteristics and decomposition mechanism of supersaturated sodium aluminate solution are reviewed.

本文对过饱和铝酸钠溶液中铝酸根离子存在的基本形态，浓度、苛性比和阳离子对铝酸钠溶液结构性质的影响，溶液中多种铝酸根离子平衡与转化规律，以及铝酸钠溶液分解机理研究的现状进行了总结和评述；分析了现有铝酸钠溶液结构性质与分解机理研究的不足；围绕强化氧化铝生产中铝酸钠溶液分解过程的目的，提出了铝酸钠溶液结构性质与分解机理研究的重点。

Chelate fiber with amidoxime group,which is obtained from chemical modification of PAN fiber,is treated with mercury nitrate to prepare anion-exchange fiber.The optimum conditions of the anion-exchange fiber absorption of the thiocyanate ion,such as ion concentration,time,the pH value were studied.

以聚丙烯腈纤维进行NH2OH化学改性制得的含有偕胺肟基的螯合纤维为原料，经Hg(NO3)2化学处理，制得阴离子交换纤维；并以硫氰酸根离子为研究对象，系统地探讨和研究了阴离子交换纤维吸附硫氰酸根离子的最佳条件参数：离子浓度、时间、pH值等。

Both crystallographically unique Zn atoms exit as an octahedral geometry. The four equatorial positions of Zn1 atom are occupied by the carboxylate-oxygen atoms of the two tartrates, and the two oxygens of the left four carboxylate-oxygen atoms coordinate to two different Zn2 atoms, respectively, forming infinite coordination polymer chains. The left two of the trans equatorial positions of Zn2 atom are completed with two oxygen atoms of two water molecules. The axial positions of both Zn atoms are occupied by the nitrogen atoms from different 4,4'-bipyridine molecules to give a 2D rectangular-grid layers with a cavity dimension of 0.51165(3)nm×1.13896(5) nm. A three dimensional network is formed by the crystallization water chains joined by the carboxylate-oxygen atoms through hydrogen-bonding interactions.

两个晶体学独立的Zn原子均为八面体构型，其中Zn1原子赤道配位点被2个酒石酸根中的4个羧酸根氧螯合配位， 2个酒石酸根中剩下的4个羧酸根氧中的2个分别与2个Zn2原子连接形成无限一维链， Zn2原子的另外2个反式赤道配位点被2个水分子氧占据，同时这两种Zn原子的轴向配位点均被4，4'-联吡啶的氮原子占据，形成具有矩形格子[0.51165(3) nm×1.13896(5) nm]的二维层状结构，游离的2个水分子通过氢键作用形成二聚体，并与酒石酸根中未与Zn配位的羧酸氧连接，把二维层状结构连接成三维网状的超分子结构。

Crystal structural analysis reveals that, because water molecules bond to Cu atoms, the dhbd ligand can only adopt a hydroxyl oxygen atom to bridge two reversed U-shaped subunits into a novel centrosymmetric dual-U-shaped tetranuclear Cu structure. Each U-shaped frame consists of two crystallographically distinct Cu atoms, two dpphen ligands and one coordinated water molecule.

晶体结构分析表明，由于水的配位阻断， 2，3-二羟基丁二酸根仅通过单羟基氧桥联两个U形双核亚单元形成具有一个对称中心的双U形四核结构，其中U型亚单元包含晶体学上不对称的2个Cu原子、1个2，3-二羟基丁二酸根、2个4，7-二苯基-1，10-邻菲咯啉和1个配位H2O分子。

There are also two types of IPTligands in crystal 2. With two bidentate carboxylates, one acts as bridging ligandconnecting neighboring 〓 tetrahedral core along c axia to form ladderlike long chain.

且间苯二甲酸根配体可以分为两类：第一类配体中每个羧酸根连接四核锌四面体结构中的四条边并沿c轴方向连接邻近的四面体结构单元形成梯形长链。

A novel mixed ligands sandwich copper complex with hydrotris borate and bihydrobis borate ligands Tp: hydrotris (pyrazolyl borate; Bp: bihydrobis borate was synthesized.

合成了一种新型Ⅱ三吡唑硼酸根和二吡唑硼酸根混合配体的&三明治&型铜配合物（Tp：三吡唑硼酸根，hydrotris borate；Bp：二吡唑硼酸根，bihydrobis borate）。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。