查询词典 ions

Reaction trends of catalytic desulfurization of thiophene were determined based on the reaction energy needed, which was obtained with the AM1 calculation results of thiophene and possible carbonium ions on transition state.

采用半经验AM1计算方法，利用静态理论对噻吩在分子筛催化剂上的催化裂化脱硫机理进行了量子化学计算研究，通过对噻吩分子和可能产生的中间正碳离子的量子化学计算，得到各中间反应所需的能量，从而判断噻吩催化裂化脱硫反应的趋势，证实了氢转移反应在催化裂化脱硫中所起的作用。

According to Wurtz reaction, if we can control solvothermal reactive condition to make the four C-Cl bonds in the carbon tetrachloride broken incompletely, according to the mechanism of Wurtz reaction, some kinds of free radicals or carbonium ions will be produced in solvothermal condition.

那么，如果控制反应条件，使四氯化碳等小分子碳氯化合物中的氯原子不完全脱掉，根据Wurtz反应机理，反应体系中将产生大量的碳氯自由基或碳正离子，它们在溶剂热条件下按照一定的生长规律进行组合，必将生成大量的多氯代多环芳香化合物。

The experiments for determining the mechanism and kinetics of catalytic pyrolysis reaction for a simple petroleum feedstock, were carried out in a batch micro-reactor using Daqing light gas oil. The results showed that carbonium and free radical reactions were the key reactions in catalytic pyrolysis. The carbonium ions were induced by catalytic reaction, whereas free radical reaction was predominantly due to thermal cracking.

首先在重油微反装置上考察大庆减压馏分油催化裂解反应产品分布，并将反应结果与相同温度范围内的热裂解反应相比较，二者的产品分布随温度等操作参数的变化规律明显不同，进而推断催化裂解反应过程为正碳离子反应机理和自由基反应机理并存；并建立了大庆减压馏分油催化裂解消失动力学模型，求得了化学反应速率常数。

Their adsorption rate on the molecular sieve catalysts surface and the stability of their carbonium ions were then obtained based on the molecular simulation on these molecules from their dipole moment, 2-dimensional electrostatic potential energy contours and 3-dimensional electrostatic potential energy isosurface.

采用半经验的AM1量子化学计算方法和静态理论，分别考察了噻吩、 3 甲基噻吩和 2 ，5 二甲基噻吩分子结构特性的不同，从偶极矩、各自垂直于芳香环平面的二维电势能分布曲线和整个分子周围三维电势能分布情况等方面分析了它们在分子筛催化剂表面吸附速度的快慢和生成正碳离子稳定性的高低，进一步比较了噻吩及其衍生物所生成的正碳离子进一步反应的能量变化，从而可判断噻吩及其衍生物裂化脱硫速度的快慢，噻吩及其衍生物裂化脱硫的速度由大到小分别为：2 ，5 二甲基噻吩、 3 甲基噻吩、噻吩。

The research indicated that the main electric particles forming guiding discharge channel were the electrons released from the process of the breaking up of the negative ions. During 10 microseconds after the laser pulse, the electrode also could guide discharge effectively; and it suggested the new conception of the electrode erosion, and developed new-type running disk electrode, which could discharge for a million times in atmosphere. It also suggested methods of the texturing roller of besmearing with oil film and cathodal discharge in processing. The research of the texturing roller indicated that roughness of 14 microns and the intensified depth of over 200 microns could be got.

研究表明：形成诱导放电通道的带电粒子主要是负离子解离过程释放的电子，在激光脉冲结束后10微秒内，电极都能有效诱导放电；提出了电极损耗的新概念，并研制了新型转动圆盘电极，可在大气中完成上百万次放电，提出了加工过程中负极性放电、工件表面涂介质薄膜放电的毛化工艺方法；并用之对轧辊试件进行了毛化工艺研究，毛化粗糙度可达14微米，强化深度大于200微米。

The infrared spectrum results indicate that the complexes chelate ceric ions by amino group.

通过红外光谱确定铈离子是与壳聚糖的胺基发生络合作用的。

Glycerine, triethanolamine, corn starch and polyvinyl alcohol can be immobilized onto BOPP surface using cerous ions as initiator. Attenuated total reflecteion-FITR and CA results show that vinyl monomers also can be grafted onto polymer surface by cerous ion as initiator.

在D-果糖改性CPP膜的体系中，实验结果显示随着D-果糖初始浓度的增加，改性膜的表面水接触角先下降后略微增加；增加紫外光的辐照强度能够促进D-果糖对CPP膜的表面偶合改性。

The interaction of these chalcone derivatives, DMAC-CD with transitional metal ions were studied by steady state and time-resolved fluorescence spectral techniques.

利用稳态荧光和时间分辨荧光技术研究了该类查尔酮衍生物以及上述查尔酮修饰的环糊精衍生物与过渡金属离子间的相互作用。

Metal ions of Mn2+ stimulate the ChoA activity and Ca2+ significantly stimulate the ChoB activity, while Cu2+, Fe3+, and Ag+ inhibited them.

酶A的活性能够被Mn~(2+)激活，酶B的活性则能够被Ca~(2+)激活，Cu~(2+)，Fe~(3+)和Ag~+则对两种酶的活性都有抑制作用。

X6 3?,large specific surface area and adsorbent capacity However,most molecules and hydrated ions can not enter the aperture pass because of their size over the aperture diameter of palygorslote except less simple ones Furthermore,Palygorskite adsorbs water molecule choosingly In most cases the absorbing of palygorskite is by its outside surface that works in the form of colloid and ion exchange other than i...

但是由于凹凸棒石孔道直径小于大多数分子及水合离子的直径，除少数简单分子和离子外，多数分子和离子都不能进入凹凸棒石孔道，而且凹凸棒石选择性吸附水分子，因而在多数情况下，凹凸棒石对吸附质的吸附不是内表面吸附，而是外表面吸附。并且外表面吸附是胶体和离子交换吸附。本文阐述了凹凸棒石的孔道直径、吸附选择性、体系pH 值及凹凸棒石和蒙脱石胶体颗粒的互相作用对凹凸棒石吸附性能应用的制约。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐