异构体

The thermodynamic parameters in the separation of enantiomers of amino acid derivatives and diastereomers of cinchona alkaloids were calculated and the dissociation constants of cinchonine and cinchonidine on the cinchonine imprinted monolithic disk were determined by frontal analysis.

计算了氨基酸衍生物对映体以及辛可纳非对映异构体分离过程的热力学参数并利用前沿色谱法测定了辛可宁和辛可尼丁在盘状分子印迹整体柱上的离解平衡常数。

B3LYP /aug-cc-pvDZ level of theory is applied to study the geometric structures, hyperconjugation and exchange repulsion of 13 isoelectronic equivalents of benzene obtained by successive replacement of CH groups by nitrogen atoms in benzene. More attention is paid to discussing how the energetic properties change upon the number of N atoms.

采用密度泛函理论的B3LYP方法在aug-cc-pvDZ基组上研究了13种苯及其含氮等电子体化合物的分子结构、能量和异构体相对稳定性，重点考察了含氮量对化合物含能性质的影响。

B3LYP/aug-cc-pvDZ level of theory is applied to study the geometric structures, hyperconjugation and exchange repulsion of 13 isoelectronic equivalents of benzene obtained by successive replacement of CH groups by nitrogen atoms in benzene.

采用密度泛函理论的B3LYP方法在aug-cc-pvDZ基组上研究了13种苯及其含氮等电子体化合物的分子结构、能量和异构体相对稳定性，重点考察了含氮量对化合物含能性质的影响。

The dimer and isomer of NAA has been found as the main products arised from these radical groups.

这些自由基又进一步反应形成了主要的产物，包括萘乙酸二聚体和萘乙酸的异构体。

Results: Under the experimental conditions adopted, the baseline separation of ephedrin and ephedrine levorotatory was obtained.

结果：麻黄碱及伪麻黄碱对映体得到良好分离，并满足进行左旋麻黄碱中对映异构体杂质检查所需要的条件。

In every case Werner investigated, the number of isomers found was equal to that expected for an octahedral complex.

沃纳调查了每一种情形发现，可找到的异构体数与所期望的八面体络合物数相等。

The effects of reactive route and temperature on forming control of four isomers were examined in the processes of synthesizing the thymine dimer.

考察了环丁烷嘧啶二聚体合成中反应途径和温度对四种异构体生成的影响和控制。

Isopentanol, nitrochlorobenzene, nitrotoluene and diethylbenzene were well separated in the range of optimal carrier gas velocity of 13~17cm/s.

SE-30系列毛细管色谱柱的最佳载气线这范因为13~17cm/s，且在最佳线速度下很好地分离了异戊醇、硝基氯苯、硝基甲苯及二乙苯同分异构体体系。

Methods Using the long-distance RT-PCR and a mammalian expression system, the full length cDNA of the α1D was cloned from cochleae and then expressed in HEK293 cell line.

以耳蜗基底膜中组织总RNA为模板，利用长距离RT-PCR克隆耳蜗毛细胞表达的电压门控钙通道α1D剪切异构体，并利用异源表达系统在哺乳动物细胞系进行表达。

The opening reaction of epoxide 17 by nucleobases was achieved regioselectvely to give designed isonucleosides in reasonable yield.

通过环氧化合物17的碱基开环反应，区域选择性地合成了设计的异核苷并利用制备HPLC分离了区域异构体。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。