离子结构

Methods: Antineoplastic compounds were screened by bioassay-guided method with partitive extraction and multiple column chromatographies(Sephadex LH-20,ODS and preparative HPLC).

通过分级萃取和多种硅胶柱层析(Sephadex LH-20凝胶过滤、ODS反相层析和HPLC)追踪分离抗癌活性成分；利用电喷雾离子质谱和高分辨(600 MHz)核磁共振二维谱技术鉴定化合物的结构。

Some interactions have been found between ions of sodium perchlorate and water molecules.

无机盐高氯酸钠的加入破坏了水分子的氢键结构，阴阳离子分别与水发生相互作用。

Na-montmorillonite was modified with different quaternary phosphonium salts using ion-exchange method,and the structures and property of modified montmorillonite were studied.

采用离子交换法将不同的季鏻盐交换到钠基蒙脱土的层间得到改性蒙脱土，并对改性蒙脱土的结构和性能进行了研究。

Studies on syntheses and structures of chalcogenides are of increasing interest because of their unique physical and chemical properties which are promising for applications in semiconductors, photoconductivity, non-linear optics, catalysis and ion exchange.

由于硫属化物具有独特的物理化学性质，在半导体、光电导、非线性光学、催化和离子交换等领域有广阔的应用前景，这类材料的合成与结构研究越来越受人们的关注。

More accurate results were obtained by using the new approach to calculate resonance structure and photoionization cross section.

本文使用多体微扰理论对锰原子及其离子光电离过程中光电离截面和共振结构进行了全面的理论研究和计算。

In this article, the research progress on the characterization, structure and function of the plasma membrane potassium ion transporters are reviewed.

本文对上述质膜钾离子转运体的生化特性以及结构功能研究的进展进行了综述。

Two-dimensional multilayered complex of Octabenzenesulphonate Polyhedral Oligomeric Silsesquioxane modified by alkyltrimethylammonium bromide C_nH_(2n+1N(CH_3)_3Br, CnTAB, where n denotes the carbon number in the alkyl chain via ion-exchange reaction.

一方面，使用多电荷阴离子的八磺酸根POSS和十六烷基三甲基溴化铵表面活性剂在水溶液体系里面进行离子交换反应，利用有机-无机不同的相似相容性质通过自组装的手段，得到具有规整的二维层状结构的杂化材料。

Fick's second law was always used to describe the diffusion properties of chloride in the concrete. For the application of Fick's second law in the prediction of the service life of reinforced concrete structures, many researchers have already made studies on this issue.

Fick第二定律通常被用来描述氯离子在混凝土中的扩散性质，对於Fick第二定律在钢筋混凝土结构寿命预测的应用，已经有许多学者对其进行了研究。

The structure of prehnite consists of ions Ca~(2+),Al~(3+),OH~- and[Si_3AlO_(10)]_n~(5n-).

葡萄石结构系由 Ca~(2+)，Al~(3+)，OH~-和[Si_3AlO_(10)]_~5(？-等离子组成，其中层型硅氧骨干系与(001)面平行，相隣的骨干通过离子 Al~(3+)得以结合。

In addition, two D-π-A alternative copolymers, P and P with thieno[3,4b]pyrazine in the backbone, were synthesized by Wittig-Horner polycondensation and applied in mecury detection.

此外，本论文还合成了两种含噻吡嗪单元的D-π-A结构的聚合物，作为荧光传感器敏感材料应用于汞离子检测。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。