三键

The Fourier transform infra-red spectroanalysis revealed the structure characeristics of the sulfonated copolymers, in which the characteristic absorption peaks of all the functional groups appeared in the corresponding spectrogram, and there was no olefinic band at 1635-1620cm〓.

三种磺化共聚物的特征吸收峰均较好地显示在相应的红外光谱图上，同时在1635-1620cm〓处未见碳碳双键的吸收峰。

As our studies showed, silylation of mesoporous molecular sieves with alkoxysilane was an usual method of linking desired organical groups. However, as a result, the a lot of silanol groups still existed on the surface of mosoporous molecular sieves after silylation, which maybe affect the interface property and its catalystic activity. Based on this consideration, a novel method was proposed that a mixture of trichlorosilanes was used to silylate mesoporous molecular sieves, introducing both the further reactive group and hyhrophobic methyl group in one pot.

正如研究表明，通过硅氧烷与介孔分子筛表面的硅羟基反应是常见的键连有机基团的方法，但表面仍会剩余较多的硅羟基，硅羟基的存在会严重影响到介孔分子筛表面性质及催化活性，为此笔者提出采用混合的三氯化硅烷一步硅烷化介孔分子筛，在孔道内同时引入可进一步功能化的氯丙基或氯苄基和疏水性的甲基。

As a novel class of self-assembled materials, Organogel s have receivedconsiderable attention in recent years because they can organize into regularnanoarchitectures through specific noncovalent interactions including hydrogen bonds,hydrophobic interactions,π-πinteractions and Van der Waals forces.

作为一类新型的自组装材料，有机小分子凝胶通过分子间氢键作用、π-π相互作用、范德华力等可以形成有序的三维网络结构，从而使适当的有机溶剂凝胶化。

An alternative term used for kosmotrope is 'compensatory solute' as they have been found to compensate for the deleterious effects of high salt contents (which destroy the natural hydrogen bonded network of water) in osmotically stressed cells, but again behavior as a kosmotrope in one system does not mean that a solute may behave as a 'compensatory solute' in another or even that it will stabilize the structuring of water in a third.

另类术语，用以kosmotrope是'补偿性溶质'，因为他们已经发现，以弥补因有害影响。高盐含量(破坏自然的氢键网络的水)，在osmotically强调细胞但同样的行为作为kosmotrope在一个系统并不意味着溶质可能像一个'补偿性溶质的另一个甚至认为它会稳定的结构水的三分之一。

The calculated results indicate that the energy bathers for the formation of dimethyl ether and trimethyl oxonium ion inside HSAPO-34 zeolite are 1.68 and 0.93 eV, respectively. The suggested intermediate oxonium ylide is very unstable and the energy barriers for the formation of C-C bond are over 3.0 eV by concerted pathway.

结果表明，二甲醚和三甲基氧鎓离子在HSAPO-34分子筛上的生成能垒分别为1.68和0.93eV，中间体氧鎓叶立德不能稳定存在，同时表明C-C键通过协同反应形成的能垒均超过3.0ev。

In this review the structure characteristic,bonding and spectral properties,synthetic methods and chemical reactivity of tricoordinated pentavalent phosphorus Compound with the structure are described.

对具有R－P结构的三配位五价磷化合物的结构特点、成键及光谱性质、合成方法及化学反应性能作了一描述。

Within carboxylic groups, the coordination properties of carbonyl were studied and tn SEM graphs of picolinic acid, meta-methyl benzoic acid and 2-chloro-benzoic acid systems, a large amount of chains like structures probably caused by crystal growth have been firstly observed.

首次在杯[4]芳烃下沿羟基引进亲电性的三乙氧基硅基异腈酸丙酯，并且根据能量传递与匹配的机理合成了五种新型以改性超分子为功能片段的强键型杂化材料，其中与铽能量传递与发射情况最为优异。

In this mechanism, a phosphine ligand in the Ru hydride complexes is replaced by protonic solvent ROH to generate the chain carrier.

三、反应机理论文提出，在固载Ru基催化剂上的scCO〓加H〓生成HCOOH的反应中，CO〓的活化在Ru配合物的作用下，以反插入Ru-H键，生成金属-羧酸配合物的形式进行。

The solid-liquid reaction method was used for the preparation of HPLC aryl-bonded silica gel stationary phases, including 3, 5-dinitrobenzyl, quinolinyl ether and 1, 1'-di(2-naphthol) ether bonded silica gel stationary phases by using N-(β-aminoethy1)-γ-aminopropylmethyldimethoxy silane and 3-glyci-doxypropyl trimethoxylsilane as coupling reagents, respectively.

采用固液相连续反应，以N-－γ-氨丙基甲基二甲氧基硅烷和γ-丙基三甲氧基硅烷为偶联剂，分别制备了二硝基苯甲酰胺基、喹啉醚基和联萘酚醚基三种芳基键合硅胶固定相。

My home a baby born in similar circumstances, the right eye of the lacrimal gland barrier, many眼屎, the doctor said nothing, and if not her that's so, then went to Children's Hospital repatency, but more than two months when I do it with BB security key, the doctor gave me a small opening Rohto eye drops, drop three or four times a day, each massage to her eyes for two minutes, less than a week had, and now that things have not.

我家宝宝一出生，情况也差不多，右眼泪腺不通，很多眼屎，医生说没事的，等她大一点如果还不通的话就去儿童医院做通术，不过两个多月的时候我带BB去做保键，医生给我开了小乐敦眼药水，每天滴三四次，每次给她眼角按摩两分钟，不到一个星期就通了，现在一点事都没有。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了