酯

Several synthesis of phosphoric acid monoester was introduced,and their strong suit and defect were compared.

介绍了磷酸单酯的各种合成工艺路线，并比较了它们的优缺点，提出了聚磷酸法是合成高纯度磷酸单酯的最佳路线。

Study on the synthesis of the antistatic agents of didodecyl phosphate and its salts ——The synthesis and technology optimization of didodecyl phosphoryl chloride;2. The synthesis of didodecyl phosphate and its salts by the reaction of 1-dodecanol with phosphorus oxychloride was studied.

研究了以三氯氧磷与月桂醇为原料合成磷酸二月桂酯(C12-DAP)及其盐的工艺条件，考察了反应温度、反应时间和物料配比等因素对酯化反应与水解反应进程的影响，通过优化实验方法，选择了适宜的合成工艺条件。

Methomyl, fipronil, tebufenozide and imidacloprid resulted in slow photodecomposition of rotenone in aqueous solution revealing a photo-extinction effect, chlorpyrifos, ethiofencarb, cypermethrin and tetramethrin made the photolysis of rotenone in aqueous solution fast showing an obvious photosensitized effect.

室内条件下研究了鱼藤酮水溶液存在不同杀虫剂时，鱼藤酮的紫外光降解，结果表明：灭多威、氟虫腈、虫酰肼和吡虫啉使鱼藤酮在水溶液中的光解速率下降，表现出明显的光猝灭降解效应；毒死蜱、杀虫单、氯氰菊酯和胺菊酯使鱼藤酮在水溶液中的光解速率加快，表现出光敏化降解效应。

Understand and familiarize with the classification of cholinergic agents, M effects, N effects, and also the pharmacological effects, clinical application and adverse reaction of physostigmine.

熟悉拟胆碱药的分类、M、N样作用、毒扁豆碱的作用、应用及主要不良反应；有机磷酸酯类中毒解救原则、胆碱酯酶复活药碘解磷定的作用机制和临床用途。

It has been demonstrated that TAK-147 is more potent and brain-specific AChE inhibition than tacrine and physostigmine, and has been approval potentiating choline acetyltransferase activity in cultured rat septal neurons more potent than donepezil, tacrine and revastigmine.

TAK－147 ｛ 3－［l一（phenylmethyl（－4－piperidinyl］－l一门，3，4，5－tetrahydro－IH－l－be.azepln－8－yi（－l－propanone umarate ｝是日本最近研制的一个选择性胆碱酯酶抑制剂。TAK－147与毒扁豆碱和他克林相比是具有更强作用和中枢选择性的胆碱酯酶抑制剂。

The ammonia was evaporated under decreasing pressure, and the precipitate was filtered off and the liquid was poured into hot saturated picric acid solution to get picrate with a yield of 85.0%. The optimum process starting from imidazole-4,5-dicarboxylic acid was: imidazole-4,5-dicarboxylic acid in acetic anhydride was refluxed to get imidazole-4-carboxylic acid, and the product was esterification in ethanol with a catalyzer of concentrated sulfuric acid to get ethyl imidazole-4-carboxylate, at last the compound above was reduced by LiAlH4 in ether at room temperature to get the target compound, the total yield of this route was 49.6%.

以4，5-二羧酸咪唑为原料的较佳工艺：1 脱羧反应：4，5-二羧酸咪唑40g，醋酐1200ml，回流10h，过滤并将滤液浓缩至干，所得固体加至50%的乙醇溶液回流，过滤并将滤液自然冷却过夜，过滤得固体；2 酯化反应：4(5)-羧酸咪唑50g，乙醇1000ml和浓硫酸60ml，加热回流2h，5%浓度NaOH溶液调节至pH＝8，减压浓缩至干，加入少量水回流，自然冷却过夜并过滤得固体；3 还原反应：LiAlH410g，乙醚300ml和4(5)-羧酸咪唑乙酯28g，常温反应1.5h，小心滴加25ml水后过滤，滤渣溶于300ml甲醇中并过滤，收集所得乙醚和甲醇滤液浓缩至干，将所得固体溶于300ml乙醇中加热回流，后将溶液浓缩至约30ml，冷却并过滤得固体，该路线总收率为49.6%。

In this thesis, we developed a new method to construct 2, 3, 6-trisubstituted piperidines using enantiopure -amino acid derivatives as the starting material and applied them to the synthesis of some piperidine alkaloids which showed interesting physiological activities.

本论文中，我们从非手性原料出发，通过手性胺对、(-不饱和酯的Michael加成来获得光学纯的-氨基酸酯，发展了一种构建2、3、6-三取代哌啶环的方法，并利用这种方法合成了一些具有重要生理活性的生物碱类天然产物。

The synthesis qualifications of tributyl oleoylcitrate were studied. The effect of plasticization of tributyl oleoylcitrate was discussed.

研究油酰柠檬酸三丁酯的合成工艺条件，探讨油酰柠檬酸三丁酯的增塑效果。

The test showed that the vegetable oil was better for plasticization of polystyrene.

结果 表明植物油对聚苯乙烯具有良好的增塑性，采用乙酸乙酯、乙酸乙酯和甲苯两种体系的溶剂进行溶解制备包膜肥料，除A1外，其他5种肥料初期溶出率均低于40%，可以确认用此两种体系溶剂溶解聚苯乙烯皆可行，混合溶剂体系的效果更好些。

ATBC is a kind of environment friendly plasticizer which can plasticize PLA effectively.

柠檬酸酯类增塑剂虽然能够有效增塑PLA，但由于析出严重而影响柠檬酸酯的应用。

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。