查询词典 dimmers

The excited-state intramolecular proton transfer tautomerism reaction of 6-methyl-4-hydroxy pyri-midine monomers and dimmers was investigated by the ab initio method with the self-consistent reaction field with Tomas's polarized continuum mode and CIS theories at HF level on the basis of 6-311+G* and 6-31G basis set. By studying the potential energy surface, it was found that the monomer's ground-state proton transfer process together with the excited-state proton transfer process is a molecular system of four energy level, but dimmers were not, which can be used to explain the fact that UV-visible absorption and fluorescence spectra of monomer and dimers all corresponded to quinoid.

采用 ab initio HF理论的组态相关CIS方法和连续溶剂模型PCM，分别在6-311+G*和6-31G水平上研究了6-甲基-4-羟基嘧啶单体及二聚体激发态质子转移的异构化反应；对其反应势能面的研究发现，单体基态和激发态的异构化反应一起可以形成四能级的分子电子体系，而二聚体的却不能，由此解释了单体和二聚体的紫外吸收光谱和荧光发射光谱均对应于酮式构型的原因。

Foot of the ON | OFF switch, online ON | OFF switch, pipe tuning, sub-light ON | OFF mother paragraph without fine-tuning of light dimmers, touch-free fine-tuning dimmers paragraph (a lamp ON | OFF mother lights without paragraph fine-tuning), the pedal dimmers (son of lights ON | OFF home without lights above fine-tuning), the pedal dimmers .......

脚踏的ON|OFF开关、线上ON|OFF开关、管内微调、子灯ON|OFF 母灯无段微调的调光器、触摸无段微调调光器（子灯ON|OFF 母灯无段微调）、脚踏的调光器（子灯ON|OFF 母灯无段微调）、脚踏的调光器……。

The results show that isobutene oligomerization is fast liquid-solid reaction. Under the temperature of 80 ℃～120 ℃ and pressure of 2.0 MPa, the products of oligomerization are mainly dimers and trimers of isobutene. The yield of trimers is higher than that of dimers and the mass fraction of trimers decreases with reaction temperature increasing. The yield of tetramers is much lower than that of dimmers and trimers. The tetramers are formed by reaction of isooctenes and C8 carbonium ion.

结果表明，异丁烯齐聚反应为快速液固相催化反应，在80 ℃～120 ℃，2.0 MPa的实验条件下，反应产物主要是异丁烯的二聚物和三聚物，且三聚物的收率远高于二聚物，两者的浓度比值随反应温度的升高而下降；少量四聚物的生成主要源于碳八烯烃与碳八正碳离子的反应。

Ozone College depletion in stratosphere has led to the increase of solar UV-B radiation reaching to the earth surface, which would damage DNA of plant epidermal cells and produce cyclobutane pyrimidine dimmers (CPD and 6-4 photoproducts.

臭氧衰减导致地表紫外辐射增强，而紫外线辐射对植物表皮细胞的DNA具有损害作用，可导致环丁烷嘧啶二聚体和6，4-光产物的形成。

College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072A novel diselenide porphyrins dimmers was synthesized using 5(4- hydroxylphenyl)-10,15,20- triphenyl porphyrin and selenium as raw materials. The structure of the novel porphyrin was confirmed by 1H NMR, IR, UV, and MS.

以5-(4-羟基苯基)-10，15，20-三苯基卟啉和硒粉为原料，合成了新型二硒双卟啉，用紫外可见光谱，红外光谱，核磁共振氢谱（1H NMR），高分辩质谱对目标产物的结构进行了确认。

Compound 6 is a sheet of dimmers, in which two Mn ions are bridged by two EO azides and the dimers are linked by the single EE bridges into a sheet.

磁性分析表明配合物6的二维层内单EE叠氮桥和双EO叠氮桥分别传递反铁磁和铁磁相互作用，但整体表现反铁磁相互作用。

This is how lamp dimmers work, and the same principle is used by speed controllers to drive a motor.

这是怎样灯调光器的工作，和相同的原则是速度控制器来驱动马达。

Did you know there are over 40 different kinds of dimmers?

光是调光器就有40几种

Sarah: Did you not say you wanted dimmers?

莎拉：你不是说过你想要安调光器吗？

As a movie is about to start, the LED strips, which are wired to 12 dimmers, dramatically fade from front to back of the auditorium space, transitioning the audience to what is about to take place on screen.

如同电影即将开始，带领带，其中有线12 dimmers ，急剧衰减，从前线回来的礼堂空间 transitioning观众什么是发生在屏幕上。

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。