查询词典 ether

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中，可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2，4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

Two dimension mathematical model of the tube reactor for dimethyl ether synthesis from methanol was established The temperature and concentration profiles in axial and radial direction for this tube reactor with change of operating condition were obtained with finite difference method,so as to provide design data for developing largescale plant of synthesizing dimethyl ether from methano

通过对甲醇气相脱水制二甲醚反应特点的研究，提出了使用拟等温管式反应器的概念；并用二维数学模型进行了数学模拟；在该模型上进行了操作条件对催化床温度分布影响的模拟研究，从而提出了该反应器的结构尺寸，为甲醇气相脱水制二甲醚的大型化开发提供了设计依据。

Suck off the ether and add it to the other jar with the ether.

在将上层加入另外的广口瓶。

Result: The stability obtained from alcohol, acetone, ether, ethyl ether all improved the stabilization of curcumin. 80% Alcohol extract had the optimal stabilizineg ability for curcumin.

结果：姜黄的乙醇、丙酮、乙醚、醋酸乙酯等提取部位均能降低姜黄素的降解速率。80%的乙醇提取物对姜黄素的稳定作用最强。

Solubility of barium chloride and barium oxide in hydrochloric acid, ethanol,acetone,ether and hydrochloric acid- ethanol,hydrochloric acid- acetone,hydrochlo- ric acid- ether has beeen studied and the separation of Ba O from Ba Cl\- 2 with hydrochloric acidethanol as the solvent has been proposed.

研究了氯化钡和氧化钡在盐酸、乙醇、丙酮、乙醚及盐酸-乙醇、盐酸-丙酮、盐酸-乙醚中的溶解性，提出以盐酸-乙醇为溶剂进行两者的分离。以 DBC- CPA为显色剂分光光度法测定氧化钡的含量，加料回收率为 98%～ 10 2 %，氧化钡含量为 0 。32 %时，平行测定 7次，相对标准偏差为 1。 58%。该法适于快速测定热处理盐浴中氧化钡的含量，对监控盐浴品质有指导意义

Benzyl ether is easy to condensed from benzyl chloride in the presence of alkali. In order to prevent production of benzyl ether, benzyl chloride must not contact with alkali.

由于氯化苄在碱作用下容易生成二苄醚，为了减少二苄醚的生成，必须避免氯化苄与碱的直接接触。

The industrialized situation, problems and solving ways of heavy alkylbenzene sulfonate and petroleum sulfonate were mainly, such introduced, and the research developments and industrialized prospect of arylalkyl sulfonate, alkylated diphenyl ether sulfonate and fatty alcohol ether sulfonate were discussed at the same time.

介绍了重烷基苯磺酸盐和石油磺酸盐工业化生产的现状、存在的问题以及解决的途径，并探讨了芳基烷基磺酸盐、烷基二苯醚磺酸盐和脂肪醇醚磺酸盐的研究现状与工业化前景。

A series of alkyl diphenyl ether were synthesized with low cost raw materials,diphenyl ether and aliphatic alcohol,catalyzed by concentrated sulfuric acid,and followed by sulfonation to produce MADS.On the basis of analysis and characterization,structure of the products was identified,effect factors of the preparation reactions were investigated and the optimum reaction conditions were obtained.2.The surface chemical properties of C_8,C_9,C_(10)-MADS were determined.

通过对产物的表征分析，对其结构进行了鉴定，并对合成反应的影响因素进行了分析讨论，优化了合成条件。2、测定了所合成的系列烷基二苯醚双磺酸钠C_8-MADS，C_9-MADS，C_(16-MADS的表面化学性能，结果表明：合成样品在质量分数高达10%的无机酸、无机碱及无机盐溶液中表面化学性能稳定，同时显示出优良的乳化性能和在硬水条件下较好的去污洗涤性能。3。

But, it was postulated, if ether exists, then another observable phenomenon, ether "drift," must also exist.

但是，它是假定的，如果以太存在，然而另外的看得见的现象，以太&冲洗&也必定存在。

The concents of testosterone and NO of the mouses gavaged with high dosages of Chinese chive extractiong were not significantly more than that of giving middle dosages.This indicated that Chinese chives might be more safe than traditional chinese herbals of sexual improvement function.2、The screening of sexual improvement function chemical substances of Chinese chivesThe crude extract was leached to four phases by petroleum ether, ethyl acetate,n-butanol and water.By doing animal tests to detect the contents of testosterone and NO in serum of mices,the result was showed that the extracts of petroleum ether and n-butanol have sexual improvement function,especial the n-butanol phase.

从小鼠灌喂不同剂量的韭菜提取液试验结果来(来源：ABCa539a5论文网www.abclunwen.com)看，灌胃高剂量的小鼠的睾酮含量和NO含量相对于中剂量来说并不上升，而是保持稳定，因为睾酮含量和NO含量过度上升可能会带来付作用，所以由此可以说明其食用安全性高，副作用小。2、韭菜改善性功能物质的筛选将韭菜粗提物依次通过不同溶剂萃取，分成石油醚、乙酸乙酯、正丁醇和水四个萃取相，通过小鼠灌胃的动物试验，以小鼠血液NO含量和睾酮含量为指标，发现正丁醇和石油醚萃取相中的物质有改善性功能的效果，尤其是正丁醇相效果非常显著。

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。