醚的

Background: We have previously proposed an equation derived from Fick's law and Lin's concept of effective blood concentration to calculate the mixed venous blood concentration of isoflurane.

背景：我们以前推荐一个由Fick 理论和 Lin的关于有效血浓度的理论计算出的混合静脉血异氟醚的浓度。

The results showed that the yield of phenyl glycidyl ether was 96.8% when the mole rate of sodium phenolate and epichlorohydrin was 1.15:1, the mass ratio of ionic liquid and reactant 2:1, reaction temperature 70℃ and reaction time 2h.

结果表明，在反应温度为70℃，反应时间为2h，反应物苯酚钠与环氧氯丙烷的物质的量比为1.5：1，离子液体与反应物的质量比为2：1时，苯基缩水甘油醚的产率为96.8%。

It was observed that the optimum temperature for the fluorous biphasic regioselective nitrations of toluene, ethylbenzene, flurobenzene, chlorobenzene, bromobenzene, odobenzene and diphenyl ether were 80℃, 60℃, 60℃, 60℃, 80℃, 80℃ and 70℃ respectively. The catalyst had almost no activity when the reaction system contained 25% of water. Simultaneously, increasing the volume ratio of fluorous phase and organic phase in the system in which the fluorous phase can miscible with organic phase could decrease ortho-para ratio.

发现甲苯、乙苯、氟苯、氯苯、溴苯、碘苯加二苯醚的最佳氟两相选择性硝化温度分别为80℃、60℃、60℃、60℃、80℃、80℃和70℃，当加入25%的水时，催化剂已基本失去活性，在氟相和有机相能完全互溶的体系中升高氟相和有机相的体积比有利于降低邻对位比值。

Chapter four. Two glucosamide-based trisiloxane Gemini surfactants which were connected with the short carbon chain dialcohol diglycidyl ether spacer were synthesized and their properties were determined. These compounds were structurally characterized by their 1H and 13C NMR spectra and elemental analysis.

界面性能通过K12表面张力仪测定，在临界聚集浓度CAC为1一3、10一5时可以显著地降低水的表面张力值至约21 mN/m，比连接基为低碳链二缩水甘油醚的略低，其CAC值随着乙氧基数的增加而增加，其CAC值比相应的单体低1~2个数量级，而且有两个CAC值。

When changing the flexible segment -- hydroxyl polyether's type and its molecular weight, and rigid segment -- aromatic isocyanic acid ester's type and function, solid's intensity, the heat resistance, the compressive strength and other performance will also vary.

改变氰凝预聚体结构中的柔性链段——端羟基聚醚的种类和分子量，或调节刚性链段——芳香族异氰酸酯的种类和官能度时，对固结体的强度、耐温性、抗压强度和其它性能可以进行控制。

Influences of reaction temperature, catalyst concentration, molar ratio of methanol to propylene oxide and reaction time on conversion of propylene oxide, yield and selectivity of propylene glycol monomethyl ether were studied.

在反应温度为120～130℃、催化剂用量为0.20%～0.30%、甲醇与环氧丙烷摩尔比为3/1～5/1的反应条件下，环氧丙烷的转化率在98％以上，丙二醇甲醚的选择性达95％，收率达93％，产品中伯醚的选择性为92％～93％。

ABSTRACT: This assay initially discussed the researches and developments of syntheses and reforming of the tetratlycidyletyer of tetraphenol ethane applying to the copper clad laminate and simply explained its principles and functions of UV-ray shield and fluorescence.

本文对四官能环氧树脂[1，1，2，2—四乙烷四缩水甘油醚]的合成与改性及在覆铜板中的应用作了初步探讨，并对其屏蔽紫外线与产生荧光的机理作用作粗浅的阐述。

It can supply with a good basis for getting polys crosslinked,grafted and other special polymers with various structures and function by changing crosslinked density and grafted density through binary copolymerization or trimerization.

而且通过二元或三元聚合，来改变交联点和接枝点的密度，为进一步得到结构更加多样化与性能各异的聚芳醚的交联聚合物、接枝聚合物及其它特种高分子材料，提供一个良好的基础。

In the process of bromotion of ester, it adopted high selective brominating agent , the yield exceeded 90% and the purity was above 95%.

在芳醚的溴化反应中，首次采用了高选择性的溴化剂，使溴化一步的收率超过90％，含量均在95％以上，具有很好的经济效益和应用前景。

Therefore the method of synthesis ethers is a potential method to pretectalcohols.

因此在本实验中，这种新的合成溴代醚的方法是一种潜在的醇保护的新方法。

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。