分子内的

Some new lignans of dibenzocycloheptadiene and benzofuran analogues were first synthesized successfully by intramolecular nonphenolic oxidative coupling and rearrangement of the 1,4-biaryl-2,3-dimethyl-2,3epoxide substituted butanes with DDQ in TFA.

以DDQ为非酚氧化偶合试剂与1，4-二芳基-2，3-环氧类化合物进行分子内的非酚氧化偶合反应，首次合成了二苯骈环庚二烯类和苯骈呋喃类的新型木脂素，其结构由不同光谱和X-单晶衍射所确证。

With the analysis of theπandσresonance,the change of bond length,dipole moment,bond energy in different state are discussed.

键能变大，偶极矩变大等反常行为是和其分子内的共振能紧密相关的。

The influence of intramonomer electron correlation on and was also found to be remarkable in the dimer system.

最后发现：在硝酰胺二聚体中，分子内的电子相关效应对和的影响很显著。

The electric field in the beam of sunlight sets the electric charges in the molecule in vibration.

太阳光束中电场使这一分子内的电荷振动。

Non--- plastic film in HighVoltage excitat, ramolecular of charge displaced and in surface induced charge, the presence of induced charge with polar envirogluvtm molecular production library of attractive, this business card printing and membership card making ink layer fastness of must have a certain value.

非导电性塑料薄膜在高压电场作用下，分子内的电荷发生位移，而在表面形成感应电荷，这种感应电荷的存在就可与极性的油墨分子产生库化吸引，这对制卡和会员卡制作墨层牢度的提高也是有一定作用的。

It seems that intricate steric or electronic demand is required for an intramolecular metathesis to take place.

会产生这样的结果主要推测与立体效应和电子效应有关，进而产生分子内的歧化反应。

Via comprehensive computations, the possibilities of vinylidene and allene intermediates were excluded, and the reaction mechanism was found to contain the following three steps:(1) gold-catalyzed cyclization to give the cyclic intermediate,(2) the cyclic intermediate undergoing a 1,3-H migration to give a more stable intermediate, with the assistance of water-cluster,(3) finially, the 1,2-H or 1,2-silyl migration occuring for generation of the observed product.

通过对各种可能的反应路径的进行计算和比较，排除了亚甲基卡宾和连二烯中间体的可能性，并确定该异构化反应机理包含以下三个步骤：（1）炔丙基吡啶反应在金催化条件下发生分子内的成环得到环状中间体；（2）环状中间体在水分子簇的协助下优先发生1，3-氢迁移反应，异构化得到更为稳定的中间体；（3）最后再进行1，2-氢迁移或是1，2-硅烷基团迁移即得到实验中所观察到的环异构化产物。

Transformation into active enzymes occurs as one or more peptide bonds in the zymogen are cleave d.

活化作用即是打断原分子内的一个或多个键。

He secondary structure of Anticoagulation Factor in the venom of agkistrodon acutus, i.

利用CD谱对皖南尖吻蝮蛇蛇毒内抗凝血因子的二级结构，即α－螺旋、β－折叠和无规则卷曲进行了测定，利用ChenandYang的方法计算出了它们在ACF分子内的百分比。

In this study, a series of star-burst DCM dyes were designed and synthesized. These novel structures can be considered to be the integration of two or three DCM chromophores into one molecule using triphenylamine as electron-donating core.

围绕抑制浓度猝灭效应的主题，本课题以三苯胺为核心，设计合成了系列星型结构的DCM类染料分子，它们均可看作是两个或三个DCM染料在一个分子内的集成。

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。