查询词典 chloric ether

The effects of different entrainers(methanol,acetone,ethyl acetate,petroleum ether and ethanol of different concentrations) on the diosgenin extraction rate were studied.

探讨了乙醇、甲醇、丙酮、乙酸乙酯、石油醚作为夹带剂以及在无夹带剂的条件下，对薯蓣皂素收率的影响。

Dissolve in ethanol, ethyl ether, chloroform and other organic solvents.

1，4-二［2-（4-吡啶）乙烯基］－苯是一种暗红色固体。

Ethyl tert-butyl ether can be produced by ethonol and isobutene catalyzed by acidic ion exchange resins.

乙基叔丁基醚一般由乙醇和异丁烯合成，以阳离子交换树脂为催化剂。

Results: The ultrasound extraction used ethyl ether superior to other methods of 5,identified 36 elements,containing the main esters,carbon-and second-category,at least acetylene category.

结果：乙醚超声萃取的前处理方法明显优于其他5种方法，鉴定出36种成分，主要为酯类，碳烯及烷类次之。

Coking and deactivation of zeolite catalysts in the synthesis of propylene glycol ethyl ether from propylene oxide and ethanol at lower reaction temperature were studied in this thesis.

本文选择反应物与生成物都含有氧原子的自环氧丙烷和乙醇合成丙二醇乙醚作为典型反应，研究较低温度下在沸石催化剂上反应过程中的的积炭失活规律。

Storage tanks developed by the introduction of new special plastic material, containing acetone, ethyl ether and other chloro-organic chemicals Fang operation, there are anti-corrosion and dissolution.

储水箱采用新研制的特种塑料材质，对含有丙酮、乙醚氯钫等有机化学物质的作业，有耐腐蚀而溶解作用。

It is easily soluble in water, acetone and alcohol, slightly soluble in ether, ethyl acetate, chloroform, and pyridine, unsoluble in benzene.

熔点151℃～154℃。易溶于水、丙酮与醇，微溶于醚、乙酸乙酯、氯仿和吡啶，不溶于苯。

And easy to dissolve in the water,at the same times,It does not dissolve in the chloroform, the ethyl alcohol, the ether and other organic solvents.

它易溶于水，不溶于氯仿、乙醇、乙醚等有机溶剂。

Various fractions of tannins with different polarities and relatively narrow molecular weight distribution were obtained by extractions using ether and ethyl acetate sequently.

通过乙醚和乙酸乙酯萃取可得到极性不同的组分。分析表明，各级分的分子量分布范围不同，且相对较窄。

Naphthol ethyl ether was sythesized with the ethanol and β-naphthol as materials and aluminium sulfate as catalyst.

介绍了以乙醇和β-萘酚为原料，在硫酸铝Al2(SO43.18H2O催化下合成β-萘乙醚的方法，讨论了反应时间，催化剂用量以及反应物摩尔比对合成的影响，确定了最佳反应条件。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。