醚

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。

Based on the recent trends, research advances of sulfonic acid resin, zeolite, heteropolyacid is reviewed, and the effect of zeolites structure, acid density, acid strength on etherification property is discussed in this paper.

针对近期的发展动态，着重综述了大孔磺酸型离子交换树脂、分子筛、杂多酸等新型醚化催化剂的研究进展，详细讨论了分子筛催化剂的结构、酸密度、酸强度对醚化性能的影响。

In pilot test of 150 t/a of synthesizing ethylene glycol tbutyl ether from isobutene and ethylene glycol, reaction temperature, catalyst life, reaction heat draw and affection of LHSV on etherization are investigated.

通过异丁烯与乙二醇合成乙二醇特丁醚 1 50 t/a中间试验，考察了反应温度、液体空速对醚化反应的影响及反应器的撤热情况，考察了催化剂的寿命，提出精制各塔操作参数和产品质量指

Two magnetic triphase catalysts of comb-like polyether s supported by γ-Fe2O3 were synthesized, and their catalytic behaviors in the iodo-substitution, etherization and the addition reaction of dichlo-rocarbene to styrene were also investigated.

以表面经偶联剂修饰的γ-Fe2O3为载体，通过聚分别与乙二醇单甲醚和一缩二乙二醇单甲醚的醇钠盐反应，合成了两种磁性梳状聚醚三相相转移催化剂，研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

"General anesthesia induces loss of consciousness, most often using hydrocarbon s (e.g., cyclopropane, ethylene); halogenated hydrocarbon s (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

"General anesthesia induce s loss of consciousness, most often using hydrocarbons (e.g., cyclopropane, ethylene); halogenated hydrocarbons (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

"General anesthesia induces loss of consciousness, most often using hydrocarbons (e.g., cyclopropane, ethylene); halogenated hydrocarbons (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

"General anesthesia induces loss of consciousness, most often using hydrocarbons (e.g., cyclopropane, ethylene); halogen ated hydrocarbons (e.g., chloroform, ethyl chloride, trichloroethylene); ethers (e.g., ethyl ether or vinyl ether);"

全身麻醉药会让人丧失意识，最常用的是烃；卤化氢(如氯仿、氯乙烷、三氯乙烯)；醚如乙醚、乙烯醚

In this study, main chain of 4,4'-Biphenol combine different side chains to discuss polymer ~ polymer which synthesizes by the difference of structure of 1-Bromobutane、1-Bromoocatane、1-Bromododecane.To examinate luminance property and judge the correction for the structure of polymer ~ polymer by FT-IR、NMR-1H、UV、PL, in the meanwhile,to investigate into radiation wavelength under the condition of different side chains.

中文摘要 1。本实验是利用4，4'-Biphenol为起始物，与Allyl bromide反应，产生丙烯基芳基醚化合物，再利用克莱森重排反应将丙烯基转至邻位，然后在将OH基转变为不同链长的烷基醚合成出聚合物耤I），以FT-IR、NMR-1H、UV、PL测定其发光性质及判断产物结构是否正确，并探讨化合物在不同侧链之条件下，比较其放射波长。

Crown ether was introduced to copolymerize with the monomer of styrene owing to which can associate with silver ions. The silver ions were in-situ reduced to silver nanoparticles by UV light. Then silver nanoparticles were led on the surface of polystyrene latex particles. The vertical precipitation was employed to get the spheres self-assembled into close packed colloidal crystal with a face centered cubic structure identified.

利用冠醚可与银离子复合的特性，制备了聚苯乙烯－冠醚乳胶粒，采用原位还原的方法在乳胶粒表面引入银纳米颗粒，通过垂直沉降，乳胶粒子可自组装成紧密堆积具有面心立方的聚苯乙烯－银胶体晶体。

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。