查询词典 dimethyl ether

The clean synthesis of 1,6-dicarbamate hexane from dimethyl carbonate and 1,6-diamine hexane is studied.

对由1，6-己二胺和碳酸二甲酸合成1，6-六亚甲基二氨基甲酸甲酯的洁净化工艺过程进行了初步研究。

The same compounds can be characteristic compounds of Curculionidae and were 1,2- Benzenedicarboxylic acid, decyl hexyl ester, n-Eicosane and 1,2,4-Benzenetricarboxylic acid, 4-dodecyl dimethyl ester.

两种害虫蜡层和护蜡层共有成分分别是：1，2-苯二甲酸-1，2-（2-甲基-1）-丁醇二酯、正二十烷和1，2，4-苯三甲酸-（4-正十二醇酯）-1，2-甲二酯，它们可能具有象虫属的特征。

A cyanide-free silver electroplating process with 5,5-dimethyl hydantoin as coordination agent is studied.

研究了5，5-二甲基乙内酰脲为配位剂的无氰镀银工艺。

The paper studied the degradation rule of Bromo-Chloro-Dimethyl Hydantoin in water environment and its acute toxicity to 4 aquatic organisms(Photobacterium phosphoreum, Chlorella vulgaris, Daphnia magna Straus and Brachydanio rerio).

研究了新型消毒剂溴氯海因在水环境中的降解规律及其影响因素以及BCDMH对4种不同生态位水生生物(发光菌、小球藻、大型溞和斑马鱼)的急性毒性。

The invention relates to formaldehyde, methanol and N, N-dimethyl hydroxylamine coexisting analysis method.

本发明涉及甲醛、甲醇和N，N-二甲基羟胺共存时的分析方法，属有机化学分析技术领域。

The invention is easy to operate, and has high accuracy. It could take rapid analysis to the coexisting formaldehyde, methanol and N, N-dimethyl hydroxylamine.

本发明的分析方法分析时间短，速度快，操作简易方便，分析精确度较高，可同时对共存时的甲醛、甲醇和N，N-二甲基羟胺进行快速分析。

The launch platform is positioned over a flame trench that splits the exhaust from the Long March YF-20 hypergolic engines in the core vehicle and boosters, which burn dinitrogen tetroxide (N2O4) and unsymmetrical dimethyl hydrazine to generate about 177,000 lb.

发射平台位于火焰导流槽上部，可以将长征二F运载火箭所排出的废气分流。

The synthesis, crystal structure and characterization of 4, 5-dimethyl-2-(2-pyridyl) imidazole were reported.

为了制备研究2-取代咪唑配合物，设计合成了4， 5-二甲基-2-（2-吡啶基）咪唑，用IR、MS、1H-NMR对其结构进行了确证，并对其晶体结构进行了分析。

A series of the ligands including 6-bromo-piperonal dimethyl acetal, bis (9-fluorenyl) silane, and the dimer of indene have been synthesized and characterized.

合成了溴代胡椒醛二甲基缩醛基配体，合成了手性配体甲基苯基双芴基硅烷，合成了茚的二聚体，对其进行表征，培养单晶并测定了晶体结构。

Intertribal hybrid calli between Isatis indigotica Fort. and Brassica oleracea L. var. alboglabra Bailey were induced using polyethylene glycol (PEG 3350) and dimethyl sulphoxide.

运用聚乙烯乙二醇和二甲基亚砜共同诱导融合的方法，成功获得芥蓝与菘蓝原生质体融合的再生愈伤。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。