查询词典 alcohol acid

Single-walled carbon nanotubes prepared from alcohol are reacted with methanoic acid for 35 min at 200℃ and under protection of helium to form short SWCNTs.

碳纳米管具有优异的力学、光学、电学和吸附等性能[1-5]，引起了广泛持续的关注，至今仍是多个领域科学家研究的热点之一。

The method is characterized in that:(1) the reflux of the 2-[N, N- 2amino]-3-cyano-group-4-thiopheneacetic-5-carboxylic acid tetra ester is carried out in the proper sodium hydroxide aqueous solution of alcohol for 5h to 6h and the pH value is kept over 10 during hydrolysis;(2) the ethanol of 20 per cent to 60 per cent is added and then the strontium chloride aqueous solution with 2times to 2.5times molal weight is directly added, precipitates the crystal, is filtered and dried;(3) water is added to carry out the reflux and the little salt packed in the crude product is removed, and the product is collected through heat filtration.

其特征在于：①将2--3-氰基-4-羧甲基噻吩-5-羧酸四酯在适量氢氧化钠水醇溶液中回流5～6小时，水解过程保持pH值10以上；②然后再加入20-60％乙醇，随后直接加入2-2.5倍摩尔量氯化锶水溶液，析出结晶，过滤，晾干；③加水回流，除去粗品中包裹少量盐，热过滤，收集产品。

Under alkaline conditions, carboxymethyl konjac glucomannan with different degree of substitution was prepared through reaction of monochloroacetic acid and konjac glucomannan using isopropyl alcohol as dispersing agent.

以异丙醇为分散剂，在碱性介质中一氯乙酸和魔芋葡甘聚糖反应制备了系列羧甲基魔芋葡甘聚糖。

In the presence of acid catalyst, APG is formed by use C8 - C14 monohydric alcohols、low-carbon alcohol and glucose monohydrate with one step synthesis reaction, and it could be used without fractionation in most applications.

在酸性催化剂存在下，用C8～C14单羟基醇和低碳醇与一水合葡萄糖反应，一步合成较高纯度，在大多数应用场合不经分馏而直接使用的浅色烷基糖苷。

Naphthyl ethyl ether is synthesized from β-naphthol and ethyl alcohol by using nanometer complex heteropoly acid as catalyst.

该反应的最佳条件是：在酚醇物质的量比为1∶3.5，催化剂用量为0.6 g/0.04 molβ-萘酚，反应时间的7 h，β-萘乙醚的收率可达65.81

Ingredient: Hyaluronic acid, pearl powder, octadecyl alcohol, VE and etc.

主要成分：透明质酸、珍珠粉、十八醇、VE等。

The experiment results showed that the optimum reaction condition were as follow: concentration of H_(2)SO_(4) was 0.5 mol/L, calcinations time were 4 h at the temperature 550℃, the molar ratio of acrylic acid to octadecyl alcohol was ...

丙烯酸十八酯的优化工艺条件为：丙烯酸与十八醇的摩尔比为1.2，固体超强酸及对苯二酚的用量分别为6%、0.8%，反应温度为120℃，反应时间为3 h。在此反应条件下，酯化收率可达97%。

The production was further verified with IR.The experiment results showed that the optimum reaction condition were as follow:the molar ratio of acrylic acid to octadecyl alcohol was 1.2∶1,the amounts...

由实验得出的最佳合成条件是：丙烯酸与十八醇的摩尔比为1.2∶1，固体超强酸及对苯二酚的质量分数分别为6%，0.8%，反应温度为120℃，反应时间为3 h，在此反应条件下，酯的产率可达97%。

Octadecyl acrylate was synthesized from acrylic acid and octadecyl alcohol without water-carrying reagent.

以十八醇和丙烯酸为原料，在不加带水剂的条件下合成了丙烯酸十八酯。

The column of Hypersil-ODS C18:250mm×4.6mm 5μm; the mobile phase: 1.5% orthophosphoric acid and 10% methane alcohol;the detection wavelength: 276nm;velocity of flow: 1. 0 ml/min; temperature: 40℃;the content is measured in the way of external standard method of apex area.

方法］采用Hypersil-ODSC18(250mm×4.6mm5μm)色谱柱；流动相为甲醇—1.5%磷酸10%甲醇溶液(40：60，v/v)；检测波长为276nm；流速为1.0ml/min；柱温：40℃。

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。