查询词典 customs bond

The arylation showed high regioselectivity and only occurred on the less sterically hinderd ortho-C—H bond. The reaction could be compatible to diverse functional groups such as CH3, CH3O, and CH3CO, as well as Br and Cl substituents, which would permit to be functionalized further to construct new compounds with more complicated structures.

实验结果表明，反应表现出明显的区域选择性，芳基化只发生在空间位阻较小的sp2 C—H键上，反应可以采用多种取代基(如CH3O， CH3CO， Br和Cl)进行，这有助于通过进一步反应构建更为复杂的新化合物。

How to interpret the intense bond between Dorothy and her poet brother, which was played out in the suffocatingly tiny rooms of their home, Dove Cottage, and against the surrounding landscape of the Lake District, which inspired not only his poems but her enigmatic, evocative journals?

湖区美景环绕，鸽屋在此坐落，多萝西和诗人兄长就居住在其中令人窒息的房间里。两人朝夕相处，情同手足，华兹华斯的诗作由此激发，她神秘难懂、回忆绵绵的日记之灵感也涌上心头——如此关系又该作何解释？

Raman spectrum and UV-vis-NIR absorption spectrum show that the above procedure does not change the electronic structures of single-walled carbon nanotubes. Moreover, the infrared spectrum confirms the formation of amide bond between ammonium sulfamate and carbon nanotubes.

Raman光谱和UV-vis-NIR吸收光谱表明，上述处理过程没有改变单壁碳纳米管的电子结构；此外，红外光谱的研究说明氨基磺酸铵与碳纳米管是通过酰胺键连接起来的。

A convenient method to synthesize three kinds of novel 2-(2-hydroxyphenyl) benzimidazole in order to improve the solubilities of the fluorophores with substituent of carboxyl, ester and double-bond which are aimed for determining the sulphydryl group was reported.

合成了N-{3-(2-苯并咪唑基)-4-羟基苯基}马来酰亚胺酸， N-{3-(2-苯并咪唑基)-4-乙酸酯基苯基}和马来酰亚胺N-{3-(2-苯并咪唑基)-4-羟基苯基}马来酰亚胺，在基本荧光发射团上分别引入了羧酸基；酯基；双键活性基团。

Besides ,the present system and correspondent mea sures do not keep pace with the development speed of the elopmentspeed bond market.This paper nuts forward the corresponding countermeasures for these Problems ...

文章首先从存在的这些问题出发，进行了深入细致地分析；最后提出了解决这些问题的相应对策。

The infrared spectrums show that the phenolic tars on the waste catalyst contain the typical structure of C=O bond, and it comes from the further oxidation of catechol.

红外光谱分析表明，1620cm^(-1)，吸收峰的产生和强化进一步说明废催化剂上沉积的酚焦油含有典型的C=O结构。

A major class of tautomeric reactions involves exchange of a hydrogen atom between two other atoms in the same molecule, in both cases forming a covalent bond.

一类主要的互变异构反应是氢原子在两个其它原子间交换，与任何一方都生成共价键。

A major class of tautomeric reactions involves exchange of a hydrogen atom between two other atom s in the same molecule, in both cases forming a covalent bond.

一类主要的互变异构反应是氢原子在两个其它原子间交换，与任何一方都生成共价键。

A major class of tautomeric reaction s involves exchange of a hydrogen atom between two other atoms in the same molecule, in both cases forming a covalent bond.

一类主要的互变异构反应是氢原子在两个其它原子间交换，与任何一方都生成共价键。

Tender bond is designed to protect Tenderee and Buyer from losses because of any actions of tenderers.

15.2 投标保证金是为了保护招标机构和买方免遭因投标人的行为而蒙受损失。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。