查询词典 C.H.

With single strength window charge proportional counter and special light path system, the detectability reaches 10pprn. Automatic C/H ratio modification is applicable to various samples; a result can be got in 15 seconds at the soonest.

不含同位素放射源；采用薄窗充气正比计数管和特殊的光路系统，使检测限达到10pprn；自动C/H比修正，适合多种样品；最快15秒给出结果；外观美观、时尚。

C.H. Muller and his colleagues at CPATU, in Belém, he executed the most complete research project undertaken with Brazil nut to date.

C.H。穆勒和他的同事们在贝伦的Cpatu ，进行和完成了目前最完整的巴西坚果研究项目。

Whereas the tin hydride is used, for preparing functional fivemembered rings ,to induced alkenyl radical translocation/ cyclization process ——oxidaton process by selective activation of a C H bond——developed by Curran et al., thiophenol, non-tin chemical, is used in this new synthetic method for preparing cyclopentane derivatives through a 1,5-hydrogen transfer/cyclization sequenceEq.

在这些目标中，发展无毒、环保试剂实施有效的自由基反应是一具有挑战性的目标。Curran等发明了用氢化锡介导的自由基易位/环化过程是一种通过C H键的选择性氧化制备功能五元环的高效的方法。

The results show that the DLC films are in amorphous state, with a certain amount of C—H bonds.

结果表明，这样制备的DLC膜是无定形态的，包含了大量的C—H键，具有良好的透明性。

To further explore the origin of the blue shift for C-H bond not directly participating in H-bond formation, we present a theoretical investigation on the complexes formed by formamide and small molecules such as HF et al.

为了进一步研究不直接参与氢键形成的C-H键蓝移的起因，我们对甲酰胺和HF等小分子形成的氢键复合物进行了理论计算研究。

There, Gurnard received six battle stars and the Navy Unit Commendation, while her captain, Lieutenant Commander C.H.

在那儿，"鲂鱼"号得到六颗战星和海军集体嘉奖，她的艇长，海军上尉C.H。

The most preferable substituents are methyl groups for positions R1 and/or R2, due to the existence of a hyperconjugation effect between the p z orbital of the central carbon atom and one of the C—H bond orbitals in methyl group.

当R1， R2位置是甲基时，由于碳原子的p z 轨道与甲基的一个C—H键轨道间存在强的超共轭效应，从而可以较大程度地降低α-氢转移反应的势垒。

FT-IR spectrum showed that the new bands at 3000cm-1~2700cm-1 and 1600cm-1~1400cm-1 were assigned to the C-H telescopic vibration and the framework vibration feature of imidazole ring, besides the characteristic bands of BMMs appeared in all samples, however, all of characteristic bands for imidazolium ionic liquid disappeared in the samples when calcined at 550oC, which implied that the structure of imidazolium ionic liquid has been destroyed during calcinations.

FT-IR分析测试中3000cm-1~2700cm-1及1600cm-1~1400cm-1波数范围内的谱带被认为是饱和的C-H伸缩振动和芳环骨架振动，说明离子液体的存在，这些峰只在萃取样品中出现，可见键连的离子液体的结构在焙烧过程中被破坏。

For Nitro derivatives of methylbenzenes, the pyrolysis initial reaction is an isomerization reaction. It means the alpha C-H bond in methyl rupture, then the Hydrogen atom transfer to the Oxygen atom in nitryl to form isomer.

甲苯的硝基衍生物的热解引发反应为异构化反应——α_中的C-H键断裂，氢原子转移到邻位硝基(-NO_2)中的氧原子上，生成新的异构体化合物。

Therelative rates of the Rh-mediated carbenoid insertion into the benzylic C - H bonds of aseries of para-substituted phenyl substrates: methyl 2-diazo-3-oxo-6-(4-substituted phenyl)-4-propylhexanoate 47a - g, have been measured by an indirect intramolecular competitionmethod under the condition in which the possible steric and conformational effects have beenminimized.

为了将立体因素和构象因素最大程度减小，以便较为准确地评价电子效应对该反应的影响，设计并合成了不同对位取代基的化合物4-丙基-6-(4-取代苯基)-2-重氮基-3-氧代己酸甲酯47a-g，并研究了它们在不同Rh催化剂作用下的分子内C-H插入反应。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。