查询词典 ether

The paper suggests that the extraction of petroleum ether, polysaccharide and sodium copper chlorophyllin from banana leaves can be exploited as dishware abluent or abluent–assistants.

因此，从泡沫性能、表面张力、去污力三个方面，本研究认为香蕉叶石油醚抽出物、叶多糖和叶绿素铜钠盐可以开发作为餐具洗涤剂或洗涤助剂。

For the same blending system, the penetration rates for acetic ether, absolute alcohol and gasoline, increase in sequence.

对同一体系，对乙酸乙酯渗透率最小，无水乙醇次之，汽油最大。

Benzyl isopropyl ether also forms CCT complex with oxygen on the benzene ring like phenyl isopropyl ether, but it is easy to oxidize since charge transfer and 〓 transfer may occur at the methylene group adjacent to the benzene ring, which result in the oxidation of the methylene group.(4) The 〓-CCT complex and the initial dark oxidation mechanism of poly were studied.

虽然苄基异丙醚也以苯环与O〓形成CCT复合物，但它却容易发生暗氧化，这是由于与苯基相连的是亚甲基，此时电荷转移发生在苯环与亚甲基之间，引起亚甲基的氧化，而不是异丙基的氧化。

It was confirmed that the 〓-CCT of phenyl isopropyl ether is formed on the benzene ring rather thanon the etheroxy bond. The 〓-CCT complex is not strong enough to induce charge transfer and converts to CTC because the isopropyl group is separated from the benzene ring by oxygen atom. As a result,〓 can not transfer from isopropyl to form radical in cage. Therefore phenyl isopropyl ether is difficult to undergo dark oxidation.

这是由于苯基异丙醚和异丙醚形成O〓-CCT的部位不同，苯基异丙醚的O〓-CCT形成在苯环上，与异丙基相隔一个氧原子，不足以诱发异丙基电荷转移而转化为CTC，也就不能有氢质子转移和笼式自由基的形成，因此难于发生暗氧化反应。

The methods to eliminate the furfural's interference in the determination of cyanide in wastewater, such as silver salt, petroleum ether extraction, two-step petroleum ether extraction, are tested and compared.

目前对糠醛干扰氰化物测定方面的报道不多，大多是只是针对醛类干扰的消除方法，主要有：NaCl -AgNO3-H2 SO4蒸馏法〔3〕、银盐沉淀法〔4 ，5〕、萃取分离〔6〕。

Main propylene glycol ethers and ether products and derivative products, is the nation's largest alcohol ether specialized production bases.

公司主营乙二醇醚和丙二醇醚系列产品及其衍生产品，是国内最大的醇醚专业化生产基地。

As raw chemical materials, produce acetone, hydrogen peroxide, methyl isobutyl ketone, isobutyl ketone, 2-Propanol, diisopropyl ether and isopropyl alcohol ether, isopropyl chloride, isopropyl and fatty acids and fatty acid chloride as isopropyl.

作为化工原料，可生产丙酮、过氧化氢、甲基异丁基酮、二异丁基酮、异丙胺、异丙醚、异丙醇醚、异丙基氯化物，以及脂肪酸异丙酯和氯代脂肪酸异丙酯等。

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。

We remember that the velocity of light in vacuo, or in other words, in ether, is 186,000 miles per second and that light is an electromagnetic wave spreading through the ether.

我们记得在真空中，或者说在以太中，光的速度是3.0×10^5公里每秒，而光就是在以太中传播的电磁波。

At first, the broth was acidified, then centrifuged to get mycelia, which was heated and powdered; finally we use acetic ether to soak the powder. After that, the phase of acetic ether was washed using the solution of ammonium sulfate and the solution of ethanedioic acid, then concentrated to gain pulps. It was crystallized at 4℃.The coarse crystals was decolorized by activated carbons, the pure needle crystal of lovastatin was obtained.

发酵液经酸化处理后，离心得到菌体，烘干后过筛得到菌粉；用乙酸乙酯浸泡，乙酸乙酯相需用(NH_4)_2SO_4溶液和草酸溶液洗涤两次；乙酸乙酯相经薄膜浓缩得到浆状物，于4℃结晶，得到粗晶体；再经粉末活性炭脱色和重结晶后得白色针状结晶，为lovastatin的纯品。

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。