The cholesterol esterase and its oxidase were respectively immobilized onto sol-gel ( tetraethyl orthosilicate) and then an enzymatic reaction column was prepared.

Objective: To study hydrolysis of vitamin E acetate catalyzed by cholesterol esterase in the reversed micelle systems.

目的：探索反胶束体系中维生素E醋酸酯的酶促水解规律。

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Results: cholesterol esterase can catalyze the hydrolysis of vitamin E acetate in lecithin/ cholesterd/ cyclohexane reversed micelle systems.

结果：在卵磷脂胆固醇环己烷反胶束体系中，胆甾醇酯酶对维生素E醋酸酯具有催化活性。

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Study on Catalyzed Hydrolysis of Vitamin E by Cholesterol Esterase in the Reversed Micelle Systems

反胶束体系中维生素E的胆甾醇酯酶催化水解

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It analyzes half ester acid value change and synthesis results by acid value titration.

用酸值滴定、红外光谱分析半酯酸值变化和合成结果。

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Adjustment of the after-solution temperature and the solidification bath temperature may improve the structure and morphology of the product, which can be explained with the concept of residual ester value. This shows that the selected technological parameters are reasonable.

通过溶解温度和凝固浴温度的调整，可以改善产品的结构形态，并用剩余酯化度的概念解释了二者之间的关系，证明了工艺参数选择的合理性。

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Thereby the relationships between the colloidal stability of viscose and the ester value of cellulose sulphonate, as well as the alkalinity and the quantity of CS2 used are discussed.

本文通过对溶解和熟成初期过程的研究，着重论述了粘胶的胶态稳定性与纤维素黄酸酯的酯化度、溶液中碱的浓度和CS2用量之间的关系。

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It not only describes the extraneous factors influencing the esterification, but also explains the internal reasons which restrict the ester value of iso-octyl salicylate.

文中讨论了影响酯化反应的外部条件，同时对制约水杨酸异辛酯酯化率的内在因素也作了相应的解释。

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Essential oils ( containing tertiary alcohols)& Estimation of free alcohols content by determination of ester value after acetylation

GB/T14455.8-1993精油（含叔醇）乙酰化后酯值的测定和游离醇含量的评估

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Essential oils& Determination of ester value of oils containing difficult-to-saponify esters

GB/T14455.10-1993精油含难以皂化酯类的精油酯值的测定

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Test methods for acid value, saponification value, ester value, iodine value, hydroxyl value and unsaponifiable matter of chemical products

化学产品酸值、皂化值、酯化值、碘值、羟值及未皂化物质化学分析方法

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Vicinal diol can be effectively translated into azelaic acid and the corresponding dicarboxylic acid monomethyl ester.

邻二醇可以有效地转化为壬酸和相应的二元酸单甲酯。

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Carbonic acid, dibutyl ester; dibutyl carbonate;

二丁基碳酸酯；

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Compounding of Specific Lateral High Carbonic Polypropylene Alcoholic Ester and Pour Point Depressant Performance Evaluation

特殊支链聚丙烯酸高碳醇酯的合成及降凝性能评价

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This text has introduced briefly the physical performance of the Polycarbonate and production status at present. Comparatively detailed elucidation gathers the application distribution situation in nine major fields such as optics, automobile industry, aviation, spaceflight of carbonic acid ester.

介绍了聚碳酸酯的物理性能和生产现状，详细地阐明了聚碳酸酯在光学、汽车制造工业、航空航天等九大领域的应用分布情况。

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Some metal oxides, organic and inorganic salts were studied as catalyst for synthesis of aliphatic carbonic ester by alcoholysis of urea.

考察了以不同金属氧化物为催化剂对尿素醇解合成长碳链脂肪族碳酸二酯的催化活性，发现氧化锌具有较高的催化活性。

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The high-effective catalysis and synthesis of cyclic carbonic ester by Zn ion solution system

锌离子液体系高效催化合成环状碳酸酯

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The paraffin wax is oxidized without catalysts by the self made experimental apparatus, and the acid number ( AN) and the ester number ( EN) of oxidized wax are correlated with the reaction conditions using artificial neural network ( ANN).

在自制的石蜡氧化装置上对石蜡进行了无催化剂氧化，并利用人工神经网络将氧化蜡的酸值和酯值与石蜡氧化条件（反应温度、空气流量和反应时间）进行关联。

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So it is an important raw material for the production of paper, coatings, inks, rubber, soaps, electronic industrial products, food grade ester gum, rosin ester resins etc.

是造纸、涂料、油墨、橡胶、肥皂、电子、食用酯胶、松香酯树脂等工业的重要原料。

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Using Tobacco-seed Oil Instead of Tung Oil to Make Phenol Aldehyde and ester Gum Paint

用烟籽油代替桐油制酚醛、酯胶树脂漆

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As the bending strength of sodium silicate sand cured by ester method is much higher than that cured by CO_2 method the analysis shows that the key point is the refinement of grains of silicate gel.

分析了酯法比CO2法水玻璃砂强度高的原因，指出充分发挥水玻璃粘结效率的关键在于细化水玻璃凝胶胶位。

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