查询词典 acetacetic ester

After ultra high pressure treatment, limonene concentration was decreased greatly while myrcene and α-pinene concentrations were not changed significantly and the concentration of limonene was decreased by 75% after high pressure treatment of 500 MPa for 15 min,α-terpineol and carvone concentrations were increased significantly. The aldehydes concentrations were retained well. The ester concentrations were changed under high pressure treatment, but generally their concentrations were not changed remarkably.

通过定量检测分析发现：超高压处理对橙汁中的柠檬烯成分影响很显著，经500 MPa的压力处理15 min后其含量下降了75%，而月桂烯和α-蒎烯受高压影响较小；α-松油醇、香芹酮含量经高压处理后迅速增加；醛类特征香气成分基本不受高压影响；酯类成分在高压下会发生变化，但总体变化不显著。

Objective: To study effect of Laurate alcohol ester phenylacetate as precursor on thallus itself and fermentation unit in penicillin fermentation process.

目的：研究苯乙酸月桂醇酯作为前体对青霉素发酵过程中菌体本身和发酵单位的影响。

The present invention discloses a method for separating and extracting polyhydroxy fatty acid ester from bacterial thallus.

本发明公开了一种从细菌菌体内分离提取聚羟基脂肪酸酯的方法，以便能够有效地从细菌菌体内分离提取聚羟基脂肪酸酯。

Ester of lentinan polysaccharide had a significant inhibition to HBeAg excretion from Hep G2215 cells with a better therapeutic index TI

该酯化多糖对Hep G2215细胞分泌的HBeAg有不同程度的抑制作用，其治疗指数TI大于2。

By the experiments of friction and abrasion with the ball-plate fricti on testing machine, the effects for lubricant properties on different contents o f Triethanolamine oleic soap, boric acid ester and Thiocarbamide in a series of cutting fluid s were compared and that the three kinds of additives have good coo perating lubricating functions is presented.

利用盘球式摩擦磨损试验机进行摩擦磨损试验，比较了金属切削液中分别加入不同含量的油酸三乙醇胺、硼酸脂、硫脲对自制合成切削液润滑性能的影响，认为三者有良好的协同润滑作用。

By the experiments of friction and abrasion with the ball-plate fricti on testing machine, the effects for lubricant properties on different contents o f Triethanolamine oleic soap, boric acid ester and Thiocarbamide in a series of cutting fluids were compared and that the three kinds of additives have good coo perating lubricating functions is presented.

利用盘球式摩擦磨损试验机进行摩擦磨损试验，比较了金属切削液中分别加入不同含量的油酸三乙醇胺、硼酸脂、硫脲对自制合成切削液润滑性能的影响，认为三者有良好的协同润滑作用。

Keywords amino acid methyl ester hydrochloride;amino acids;methanol solution of thionyl chloride;thionyl chloride;synthesis

氨基酸甲酯盐酸盐；氨基酸；二氯亚砜-甲醇溶液；二氯亚砜；合成

The influentical factors on the synthesis of L-serine methyl ester hydrochloride with thionyl chloride were studied and optimized.

对亚硫酰氯法制备L-丝氨酸甲酯盐酸盐的影响因素进行试验及优化，较佳工艺条件下酯化收率可达85.0%以上，产品含量≥98.0%。

In order to manufacture high performance styrene-acrylic ester emulsion,the effects of emulsifier,auxiliary agent DZ-1 and acrylic on its viscosity and thixotropy were studied in this paper.

为了制备高性能的苯丙乳液，研究了乳化剂、助剂DZ-1及丙烯酸对苯丙乳液黏度及触变指数等性能的影响。

A salt or an ester of titanic acid .

一种硼酸和硅酸形成的盐。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。