邻苯二甲酸二甲酯与邻苯二甲酸二乙酯配合用于醋酸纤维素的薄膜、透明纸和模塑粉等制作中。
Phthalic acid dimethyl phthalate two two and two formic acid ethyl ester two for cellulose acetate film, transparent paper and molding powder production.
采用直接酯化法，将山梨酸与四种醇反应，合成了山梨酸甲酯、乙酯、丙酯、丁酯。
Methyl, ethyl, propyl and butyl sorbates were synthesized by esterification of sorbic acid with four kinds of alcohol respectively.
研究了以无水碳酸钠为催化剂，红霉素肟与甲氧基乙氧基氯甲醚(MEMC)为原料，一步合成罗红霉素的实验过程。
The experimental process on synthesis of roxithromycin was studied by using erythromycin oxime and MEMC as raw material under the catalytic action of anhydrous sodium carbonate.
在气相色谱上，乙酰乙酸甲酯、乙酰乙酸乙酯、3-氧代戊酸甲酯与醇在无任何催化剂存在下，发生酯交换反应。
Gas chromatography(GC) as a chemical reactor, methyl acetoacetate, ethyl acetoacetate, and methyl(3-oxo) pentanoate can undergo transesterfication with various alcohols without any catalyzers.
应用紫外差光谱和荧光光谱法研究了水溶液中酰胺类除草剂乙草胺、丙草胺、丁草胺、异丙甲草胺与脲酶分子间的相互作用。
The binding of acetochor, pretilachor, butachlor and metolachlor to urease in aqueous solution was studied using UV difference spectrum and fluorescence spectrum methods.
氢化苯甲酸甲酯和乙酯时，被氢化物与溶剂之比率很重要的。
The ratio of solvent to reactant to be hydrogenated was critical.
甲罐和乙罐各用三个传感器支承，传感器分别通过第一仪表、第二仪表与计算 机相连接。
The fourth valve and the third valve are connected with and controlled by a programmable controller. The tank A and the tank B are supported by three sensors respectively.
当底物换作2-丁炔酸乙酯时，与邻苯二甲酰亚胺在相同的条件下反应同样可以以良好至优秀的收率得到目标产物。
When ethyl but-2-ynoate was reacted with phthalimidomalonates under the same conditions, pyrroloisoindolinone derivatives were also obtained in good to excellent yields.
应用紫外差光谱和荧光光谱法研究了水溶液中酰胺类除草剂乙草胺、丙草胺、丁草胺、异丙甲草胺与脲酶分子间的相互作用。
The binding of metolachlor and S Isomer to urease in aqueous solution was studied using UV difference spectrum and fluorescence spectrum.
通过改变硫酸二乙酯的用量、水杨酸甲酯与氢氧化钾的反应时间、氢氧化钠的用量，得到了2-乙氧基苯甲酸的优化制备工艺条件。
The reaction conditions of 2-ethoxybenzoic acid were optimized by changing the amount of diethyl sulfate, reaction time of methyl salicylate and potassium hydroxide, the amount of sodium hydroxide.
以邻甲氧基苯酚与对氯*为原料，经四步反应合成6-（2-甲氧苯氧基）-1，4-二氢-4-氧代-3-喹啉羧酸乙酯。经抗鸡球虫实验证明具有抗球虫效果。
The compound 6-(2-methoxy phenoxy)-1, 4-dihydrogen-4-oxo-3-ethyl quinoline carboxylate is prepared with o-methoxyphenol and p-chloronitrobenzene as materials and through four-step reaction.
以邻甲氧基苯酚与对氯*为原料，经四步反应合成6-（2-甲氧苯氧基）-1，4-二氢-4-氧代-3-喹啉羧酸乙酯。经抗鸡球虫实验证明具有抗球虫效果。
The compound 6-(2-methoxy phenoxy)-1, 4-dihydrogen-4-oxo-3-ethyl quinoline carboxylate is prepared with o-methoxyphenol and p-chloronitrobenzene as materials and through four-step reaction.
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