查询词典 asymmetric

It is also found that the distribution of boron in diamond is asymmetric, and poor shape crystals and polycrystalls tend to form with the increase of the content of boron in diamond.

同时，实验还发现，硼在晶体中的分布情况存在着区域性，以及随着晶体内硼含量的增加，晶体晶形变差，而且容易生长聚晶。

With a peak-peak of rectangular asymmetric waveform voltage up to 1 600 V, a frequency of 195.8 kHz, a duty cycle of 30% and a compenstaion voltage of-8.63 V, the acetone displacement is compensated and the sensor ability to separate ions is demonstrated by an experiment using the planar copper drift tube.

当方波非对称射频电压峰峰值为1 600 V，频率为195.8 kHz，占空比为30%，补偿电压为-8.63 V时，采用平板铜块迁移区实现了丙酮离子的位移补偿，实验结果验证了传感器的性能。

It is obvious that l-MnO2 is a potential electrode material for asymmetric supercapacitor.

很明显l-MnO2可以作为一种潜在的不对称超级电容器电极材料。

For the asymmetric reduction ofα-hydroxyacetophenone and ethyl 4-chloro acetoacetate,-1-phenyl-1,2-ethanediol and-ethyl 4-chloro-3-hydroxybutanoate were produced by the purified enzyme, with the 99% and 94.3% e.e. value respectively.

在纯酶水平验证了近平滑假丝酵母(Candida parapsilosis CCTCCM203011)对外消旋苯基乙二醇的拆分机理，整个去消旋过程是由-苯基乙二醇次级醇脱氢酶和羰基还原酶共同催化完成的。

Results It was found that the thickness of topical tunica intima of aortas increased in diabetic rats. In each focus, the elastic lamina existed asymmetric thickness and some had fissures and abruptions. The SMCs in superficial lamella showed slight proliferation and disorganized arrangement.

结果 糖尿病大鼠主动脉表现为局限性内膜增厚，中膜浅层平滑肌细胞轻度增生、排列紊乱、病灶处内弹力板呈波浪状或交织状排列、有断裂分离现象。

In addition, we also studied the asymmetric Baylis-Hillman reactions of alkynes with aryaldehydes and the application of the dibrominated compounds in palladium-catalyzed coupling reactions.

对于贫电子炔类的化合物不对称的Baylis-Hillman反应以及二溴化合物的应用转换也进行了初步的研究。

Herein we mainly discuss the asymmetric addition of terminal alkynes to aldehydes and ketones using commercially available chiral pool and their derivatives.

这篇论文论述了商业化的手性源及其衍生物配体催化的末端炔对醛和酮的不对称加成反应的研究。

Chapter 6: The analogue of the Squalamine's intermediate was synthesized from desoxycholic acid by using asymmetric addition of alkynes to the aldehydes (ee up to 99%) as key step.

第六章：利用炔对醛的不对称加成反应为工具，我们从方便易得的原料猪胆酸出发，对甾体化合物的侧链进行了改造，合成了Squalamine的中间体类似物。

The asymmetric addition of terminal alkynes to aldehydes and ketones is an important method of synthesizing chiral propartyl alcohols and tertiary alcohols, which are important pharmaceutical intermediates.

末端炔对醛和酮的不对称加成是合成光学纯的炔丙醇和手性叔醇的重要方法，是不对称催化的重要研究课题之一。

The results show that the relationship betweentotal potential energy and time step exhibits periodic characteristic when sigma-3symmetric twist grain boundary model and sigma-3 tilt grain boundary model slide atOK. But for sigma-13 asymmetric tilt grain boundary, the relationship between totalpotential energy and time step exhibits damp surge characteristic.

结果发现，∑3对称扭转晶界模型与∑3对称倾侧晶界模型在0K滑动时，系统的势能与计算步数之间的关系曲线呈现周期性变化的规律，而∑13非对称倾侧晶界模型系统的势能与计算步数之间的关系却呈现阻尼振荡特征的变化规律。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。