查询词典 valent

Otherwise existence of the phosphate, perchloride and nitrate ions can reduce the rate of chromium removal by zero valent iron in commercial powder iron system.

研究结果显示当六价铬中含有氯离子和硫酸根时能增加商业铁粉对六价铬的去除效果，而硝酸根、过氯酸根及磷酸根则会使商业铁粉去除六价铬的效果变差。

However, it is hard to prepare high valent Mn complexes with ligand with only neutral chelating nitrogen atom of two dpa arms in 〓. In order to get a Mn dimmer complex with high oxidation states of manganese to increase the possibility of storing more oxidizing equivalents necessary to oxidize water evolving oxygen, some N atoms are replaced by anionic phenolate groups.

本文以高价金属的稳定、氧化还原性能的改善、各金属离子之间联系的增强等作为主要研究内容，来改进以往模型中金属价态较低，氧化还原电位高，不利于形成氧化活性中间体；多核配合物的研究较少，且各金属活性中心相互协同作用弱等问题。

A 4 regular Hamiltonian planar map is a plannar map which is both 4 regular and Hamilitonian. A nearly 4 regular map is such a map that all of its vertices but the root vertex are 4 valent.

若一个平面地图的所有顶点是四次的，且又是哈密尔顿地图，则称该平面地图为四正则哈密尔顿平面图一个地图是近四正则的，是指除去根点外，其余顶点的次均为四。

By using the equi-valent gravity wave assumptionof tidal waves, the interaction among the typical 2 days planetary wave,semidiurnal tide and 9.6 hours inertial-gravity waves are investigatedin detail.

利用潮汐波的等价重力波假设，讨论了2天行星波与半日潮及9.6 h惯性重力波的相互作用，三波相互作用时能量守恒。

The experiments showed that the labeling process was based on physical adsorption of low valent technetium resulted from reduction reaction on the surface of carbon nanomaterials.

实验结果提示，(上标 99m)Tc标记过程是基于还原得到的低价Tc在碳纳米颗粒表面上的物理吸附机理。

New reactions induced by low-valent titanium reagent;;dReactions catalyzed by active zinc dust

中文题名低价钛试剂引起的新反应；活性锌粉催化的反应

Objective: In order to analyse the valent state of Arsenic in water in KuiTun Xinjiang,and study the pathogenesis of arsenism.

目的：对新疆奎屯地方性砷中毒病区水样中的砷进行价态分析，研究砷中毒的发病机理。

The partition behavior of Np in various valent states has been investigated with aceto hydroxamic acid as well.

探讨了反萃时间、酸度、配位体浓度、相比、反萃次数、温度、HDBP浓度、放置时间、Np价态等因素的影响。

For example,the addition reaction with small molecular,the metathetical reaction with alkynes and Wittig reaction to prepare high-valent transtion-metal allenylidene complexes.

对于化合物11，详细研究了其与小分子加成反应、炔烃复分解反应以及通过Wittig反应制备高价态过渡金属丙二烯基卡宾化合物。

In light of the principle of vanadium's valent state change,after samples are dissolved by weak nitric acid,in medium of around 15% nitric acid,the oxidant ammonium persulphate is immediately used to selectively oxidize V~(4+) to V~(5+).

利用钒的价态变化原理，试样以稀硝酸溶解后，在15%左右的硝酸介质中，直接用氧化剂过硫酸铵选择性地氧化V~(4+)为V~(5+)。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。