查询词典 organic chemistry

Benzenoid system and coronoid system s are the natural representations of the skeletons of molecules of benzenoid hydrocarbons and coronoid hydrocarbons in the field of organic chemistry.

六角系统和冠状系统分别是有机化学领域中的苯碳氢化合物和冠状碳氢化合物的分子结构的自然体现。

The invention belongs to the technical field of organic chemistry, in particular to a benzothiazole compounds and a preparation method for the compounds.

本发明属于有机化学技术领域，具体为一种苯并噻嗪类化合物及其制备方法。

The determination of the absolute configuration of chiral molecules is an important issue in organic chemistry.

手性分子绝对构型的确定是一个极其重要且长期存在的问题。

Organic chemistry ; geminal dinitro ; energetic plasticizers ; propellants ; explosives

有机化学；偕二硝基；含能增塑剂；推进剂；炸药

Methodologies for stereoselective synthesis of alkenes are of great interest in synthetic organic chemistry since many biologically active compounds occuring in nature possess the structural skeleton of disubstituted or trisubstituted alkenes.

烯烃的立体选择合成方法学研究是有机合成化学中的重要课题，因为许多重要的天然产物中均含有双取代或三取代烯烃的结构单元。

For a disubstituted complex, MA4B2, the planar arrangement gives three isomers, the familiar ortho, meta, and para arrangement s of organic chemistry.

对于双取代络合物MA4B2，其平面排列有三个异构体，常见的为有机化学中的邻位、间位和对位排列。

For a disubstituted complex, MA4B2, the planar arrangement gives three isomers, the familiar ortho, meta, and para arrangements of organic chemistry.

对于双取代络合物 MA4B2，其平面排列有三个异构体，常见的为有机化学中的邻位、间位和对位排列。

Personnel quality asks:(1) record of formal schooling of undergraduate course above;(2) chemical project / chemical craft / metallurgy material / pulverous metallurgy / coloured metallurgy / mineral treatment / organic chemistry / solid physics kind professional;(3) grade of professional during school class is medium reach above ;(4) have certain English / computer application foundation;(5) harmonious, communication capability is strong, group collaboration consciousness is outstanding;(6) obedient job arrangement, abide by work discipline;(7) male woman student is not restricted, the man student is first;(8) the person that working experience perhaps has paper to send souvenir to record is preferential consideration.

人员素质要求：（1）本科以上学历；（2）化学工程/化学工艺/冶金材料/粉末冶金/有色冶金/矿物加工/有机化学/固体物理类专业；（3）在校期间专业课成绩中等及以上；（4）有一定的英语/计算机应用基础；（5）协调、沟通能力强，团队合作意识突出；（6）服从工作安排，遵守劳动纪律；（7）男女生不限，男生优先；（8）有工作经验或者有学术论文发表记录者优先考虑。

The sequence of chapters in Study Guidance is the same as the book Organic Chemistry written by lv yixian(7th edition), and this column summarized the study goals,requirements,knowledge points,unode and nodus briefly,which will make students easy to learn, master and comprehend.

学习指导》栏目的章序与吕以仙主编的《有机化学》第七版相同，简明扼要地归纳总结了各章的学习目的要求；知识点；重点与难点。使学生对本章所要学习、掌握和了解的内容一目了然。

Radical ring expansion is a new strategy to synthesize the medium-sized and even large rings, nowadays, it is one of the important research fields of organic chemistry.

而自由基扩环反应是合成中环乃至大环有机化合物的一种有效的新方法，已成为当今有机合成化学的前沿研究领域之一。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。