查询词典 ether

Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.

根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。

Appearance and Properties:A colorless,hydroscopic,oxidative crystal,is soluble in water,dissolves in ethyl alcohol,and is slightly soluble in ether.

性状：无色结晶。

The process was methanolysis α-imino ether acid hydrogen chloride salt from methyl-cyanide.

研究了以乙腈为原料经α-亚氨基乙醚盐酸盐醇解制备原醋酸二乙酯的工艺方法，对醇解的投料比、反应时间及中和pH值等工艺条件进行了研究，得出较优惠的工艺条件。

The formation mechanism for the C-PPV aggregation we proposed is: complex between K+ and the crown ether derivatives in the C-PPV brings two polymer chains closer together, and the K+ ions create interpolymer bridges, forming aggregations in the solution.

本文合成了可溶的带冠醚取代基的聚苯撑乙烯，其中冠醚基团的氧原子直接连在PPV主链上苯环的2、3位，并研究了聚合物在K~+存在下的自组装形成聚集体的行为。

Experiments were conducted to determine the intersolubility of Dimethyl Ether and diesel fuel in a thermo-physical property measuring system with high accuracy,which consists of temperature measurement system(measurement range-80~300 ℃with uncertainty less than ±0.002 ℃) and pressure measurement system(measurement range 0~2 MPa with uncertainty less than ±0.7 kPa).

利用高精度热物性测量系统对二甲醚与柴油的互溶性进行了实验研究。实验系统中温度覆盖范围为-80~300℃，测量不确定度小于±0.002℃；压力测量范围为0~2 MPa，测量不确定度小于±0.7 kPa。测量了10%、20%、30%的二甲醚/柴油混合燃料的饱和蒸气压力和临界互溶温度。研究表明：二甲醚与柴油互溶性良好。

Dimethyl ether ; RVP ; Intersolubility ; Engine

二甲醚；饱和蒸气压；互溶性；发动机

Among the 8 herbal extracts, petroleum ether extract of Inula britanica L.

根据杀螨活性初筛结果，选取这3种触杀活性较高的中草药提取物进行毒力活性测定结果为：旋覆花石油醚提取物的LCS。

We have developed a simple and easy-handling procedure for copper-catalyzed cyanation of aryl halides using K4[Fe_6] as the cyanide source. The present procedure has ligand- and base-free advantages, and was accomplished under the conditions of exposure to the air without degassing of the solvent.4. We carried out the selective control of preparation for phenyl ether and phenol from iodobenzene with 10 mol% of Cu_2·H_2O as the catalyst under the condition of exposure to air.

这个程序有无配体无碱的好处，并能够在暴露于空气的条件下进行，溶剂也不用脱气。4、空气气氛下，用10 mol%的Cu_2·H_2O催化碘苯偶联，实现了制备二苯醚和苯酚的选择性控制：即在有(来源：Aa955BC55论文网www.abclunwen.com)机溶剂NMP中实现了碘苯直接制备二苯醚的Ullmann反应，在H2O中实现了碘苯直接制备苯酚。

The commercial application of SPC01 catalyst for decomposition of tert-amylmethyl ether to produce isoamylene was reviewed.

介绍了SPC-01型催化剂在甲基叔戊基醚裂解生产异戊烯中的工业应用。

This algorithm was applied to a typical epoxy polymeric network based on diglycidyl ether bisphenol A and isophorone diamine, obtaining a highly crosslinked infinite network model with the conversion up to 93.7%.

将其应用到异佛尔酮二胺固化双酚A二缩水甘油醚得到的聚合物，产生了一个高度交联无限扩展的聚合物网络模型，其反应转变率达到了93.7%。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。