醚的

Anethole accounted for 82.65% of the whole oil. Selective isolation of anethole form the volatile oil was carried out using an inclusion crystalline method with 1,1,6,6- tetraphenylhexa- 2,4-diyne-1,6-diol inclusion complex with anethole . The crystal structure of the inclusion complex was determined by IR, 1^H NMR and single crystal XRD techniques.

采用包结结晶方法对小茴香挥发油中的对-丙烯基茴醚进行了选择性分离，以1，1，6，6-四苯基-2，4-已二炔-1，6-二醇作为主体分子，小茴香挥发油中的对-丙烯基茴香醚作为客体分子，D.D选择性地与之形成超分子包结物晶体。

Eleven novel 2-alkylthio-5-(5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine-5-yl)-1,3,4-oxadiazole derivatives (5) and six novel 2-alkylthio-5-(5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine-5-yl)-1,3,4-thia- diazole derivatives (8) have been designed and synthesized by using 5-amino-3-ethoxycarbonyl-1H-1,2,4-triazole as a starting material.

以5-氨基－1H-1，2，4-三唑－3-羧酸乙酯为起始原料，设计合成了11个新型的2-取代硫醚－5-（5，7-二甲基－1，2，4-三唑并[1，5-a]嘧啶基）-1，3，4-恶二唑类化合物(5)和6个新型的2-取代硫醚－5-（5，7-二甲基－1，2，4-三唑并[1，5-a]嘧啶基）-1，3，4-噻二唑类化合物(8)。

Inconclusion, equipotent concentrations of desflurane or sevofluranein terms of BIS are associated with similar rSO2 values, butlarger anesthetic concentrations of both anesthetics increasedthe rSO2 values.

结论，在 BIS 方面等效浓度的地氟醚和七氟醚具有相似的 rSO2值，而两个麻醉药的较大麻醉剂浓度能提高 rSO2值。

As natural cellulose linter pulp raw materials,HEC is the name of a series of products after alkalization and etherification.

纤维素醚是以天然纤维素为基本原料，经过碱化、醚化反应而生成的一系列产品的总称。

Polyether modified polysiloxane defoaming agent s which was prepared by using hydrogenous polysiloxane and polyether as startintg materials, has good properties.

在聚硅氧烷链段上引入聚醚链段而得到的聚醚改性聚硅氧烷消泡剂是一种性能优良的消泡剂。

It was found that the chemical shift values of protons of the lariat ethers were changed with increase of their concentration. These results indicate that daisy chain-type polypseudorotaxanes were formed in concentrated solution.

结果表明冠醚中氢的化学位移随浓度的改变而变化，在浓溶液中侧臂冠醚单体通过超分子自组装形成了线性链状准聚轮烷。

Result and Conclusion The optimal concentration of 2 nonyl 1,3 dioxolane for higher percutaneous absorption of diclofenac gel was 2.0%,suggesting that 2 nonyl 1,3 dioxolane is a potent penetration enhancer.

结果 壬代环戊双醚含量在2.0％时透皮吸收最好。结论壬代环戊双醚具有较好的促渗作用，是较好的新型促渗剂。

Under proper conditions TES protecting groups could be selectively cleaved in high yields without affecting TBS groups.

在TBS硅醚存在的情况下可以选择性脱除TES硅醚保护。

Surface-active hydrophobic mono- lauryl polyoxyethylene(6)ether acrylatewas pre- pared from lauryl alcohol polyoxyethylene(6)ether and acrylate.

由丙烯酸和月桂醇聚氧乙烯(6)醚聚合得到具有表面活性的疏水单体月桂醇聚氧乙烯(6)醚丙烯酸酯。

Objective］ The research aimed to improve the comprehensive surface performance of lauryl polyoxyethylene ether (AEO3) by means of modification.［Method］ AEO3 was synthesized from lauryl alcohol and epoxy ethane, which reacted with liquid chloroacetic acid to produce modified AEC.

［目的］对月桂醇聚氧乙烯醚（AEO3）进行改性来提高它的综合表面性能［方法］用月桂醇、环氧乙烷合成月桂醇聚氧乙烯醚（AEO3），再用AEO3与液体氯乙酸反应改性合成AEC。

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。