阳离子

Flavonoids can act as antioxidants, free radical scavengers, and chelators of divalent cations and have a wide range of biological effects .

类黄酮是一组化学结构和性质上不同的多酚化合物，具有抗氧化、自由基清除和二价阳离子螯合作用，具有广泛的生物学功能。

Because of the property of donative electron of the methoxy group and the participation of the carbonyl group of the coumarin into the complexation proces...

研究表明，由于在香豆素的6 位上引入一个甲氧基，对应的主－客配合物的稳定常数较（7－甲氧基－4－亚甲基）香豆素基－单氮杂－ 18－冠－6（ MMC－ MAC（O5））与阳离子配位的稳定常数又有所增高。

In this paper, firstly, a detail analysis、 study and discussion of the existing disposing-chlorine method were made, on this condition, a new method based on the way of oxidation and deoxidization was discussed, phosphoramidic acid chelate resin and DOOl cation exchange resin were chosen as framework materials, two kinds of new disposing-chlorine materials could be obtained by loading Fe~(2+) on the skeleton of the materials, the surplus residual chlorine was disposed by taking advantage of chlorine oxidizing Fe~(2+).

本文在对已有的余氯去除方法进行分析、研究、探讨的基础上，提出一种基于氧化还原方式的吸附除氯方法，实验以氨基磷酸螯合树脂和D001强酸性阳离子交换树脂为骨架材料，并对这两种材料载Fe~(2+)改性得到两种新型除氯剂，通过固载的Fe~(2+)与水中余氯(Cl_2、ClO~-、HClO)的氧化还原作用将水中的余氯除去。

Selective doping has been proved to be a semiconductor oxide improve the photocatalytic activity of the most effective ways The introduction of certain metal ions can greatly improve the photocatalytic oxidation efficiency, Recently, a lot on the adoption of the doping to improve the photocatalytic oxidation performance reports, doped semiconductor photocatalysis material because of its physical and optical properties change, thereby improving the photocatalytic properties.

有选择性的进行掺杂已被证明是一种提高半导体氧化物光催化活性的极其有效的方法，掺入一定的金属阳离子能极大的提高TiO2的光催化效率，最近有大量的关于通过掺杂来提高TiO2的光催化性能的报道，掺杂的半导体光催化材料由于其物理和光学性质的改变，通过扩展光响应范围和提高光生电荷的分，从而提高了光催化性能。

According to the theory of electrical double layer potential in a capillary and the relation between Zeta potential and cation exchange capacity, the radial distributions of potential and ions concentration are assured.

为研究含水泥质砂岩导电特性的机理，由单毛管双电层电位理论和阳离子交换量与Zeta电位的关系，得到了毛管径向电位分布和离子浓度分布。

In basic aqueous system, large single crystal of 〓and 〓 were obtained, it wasthe first time that the double salt 〓 was synthesizedfrom aqueous solution.

在碱性条件下，首次合成了以质子化的有机胺为阳离子的无水偏钒酸盐单晶〓；首次以水热法合成了无水偏钒酸盐复盐〓单晶。

Rarely, ligands are cations and electron -pair acceptors.

配位体很少有阳离子和电子对的受主。

Gold nanoparticles was self-assembled onto a platinum electrode to form a negatively charged surface, and cationic dye-thionine was linked by Au—S and Au—N covalent bond and electrostatic adsorption as an electron transfer mediator.

在铂电极上自组装一层纳米金，构建负电荷的界面，然后通过金-硫、金-氮共价键合作用和静电吸附作用自组装一层阳离子电子媒介体硫堇。

Each starch reagent has its own mode of action on mineral surface, such as primary starch mainly by hydrogen bond, cationic starch by the co-action of hydrogen bond and electrostatic force (for minerals with negative charge on its surface), while carboxymethyl starch, hydroxamic acid starch and dialdehyde starch principally by chemical force accompanied with hydrogen bond and electrostatic force in part. Such chemical forces ensure the close adsorption of reagent on diaspore surface and enforces the hydrophilic of mineral surface. Also the branched chain enable the starch to cover the collector adsorbed on mineral surface, so as to depress diaspore furthermore.

不同淀粉药剂在矿物表面表现不同作用，原淀粉主要是氢键的作用，阳离子淀粉是氢键和静电力的共同作用，羧甲基淀粉、羟肟酸淀粉和双醛淀粉离子性药剂与矿物间的作用除了氢键、静电力外，更重要的是与矿物表面金属离子间产生的化学作用，使药剂能牢固地吸附在一水硬铝石矿物表面，增加矿物表面的亲水性，同时，淀粉支链结构的存在，使它能够掩盖吸附的捕收剂，达到抑制一水硬铝石的目的。

Because both ions in A and B sites of these compounds can be substituted by other ions with different electrovalence and radius in a wide range, their dielectric property is adjustable and can be optimized in a large scale. This implies that new type MWDC with advanced dielectric property may be exploited from these compounds and widely used.

该类化合物由于A、B位均可能被电价与半径不同的阳离子在较宽的范围内取代，所以其介电性质有较大范围的调节与优化的可能性，因此从该类化合物中极有可能开发出具有广泛应用前景的新型高性能微波介质陶瓷材料。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。