查询词典 acetacetic ester

At present, the study on molecule design, synthesis and biological activity of oxime ester compounds is a important field of pesticide development and research.

现在对于肟酯的分子设计、合成以及生物活性是农药研究领域的重要方向。

In this paper six carbazole oxime ester derivatives were synthesized through Friedel-Crafts acylation, oximation and esterification from N-alkyl-carbazole.

以N-烃基咔唑为原料，经Friedel-Crafts 酰化、成肟和酯化反应，合成了6种咔唑肟酯衍生物。

The most proper condition of synthesizing trihexyl phosphate ester with the method of phosphorus oxychloride has been discussed in this paper.

本文通过大量实验探讨了三氯氧磷法合成磷酸三己酯的最佳条件，使产率达到88.4%，正己醇的回收率达到80.0%。

This toxic effect was completely blocked by copper-zinc superoxide dismutase + catalase (SOD/catalase) or 〓-nitro-L-arginine methyl ester or oxyhemoglobin .

由〓引起的LDH释放可被超氧化物岐化酶（superoxide dismutase，SOD）+过氧化氢酶、NOS抑制剂L-NAME和氧合血红蛋白完全阻止。

With ester- 27 in hand, the vinyl group was next converted to the aldehyde moiety via ozonolysis, employing reduction of the ozonide with dimethylsulfide or PPh 3 , followed by treatment with DBU in THF to effect epimerization; aldehyde- 29 was produced in a combined yield of 65% for the two steps.

同酯-27手，下一组黑胶转为经醛啉臭氧、用人的臭氧减少与甲基或产后大出血3、治疗后，在指定四氢呋喃对异构；醛类-29年联合摄制产量65%的两步。

A salt or an ester of pantothenic acid .

泛酸盐，泛酸脂泛酸的盐或脂

Methods: P-toluenesulfonic acid diethoxyphosphorylmethyl ester (4) was prepared from diethyl phosphate and paraformaldehyde by condensation and esterification.

以亚磷酸二乙酯和多聚甲醛经缩合、酯化得到对甲苯磺酸羟甲基磷酸二乙基酯(4)。

AIM: To establish a method to determine 2,6Dimethyl4(3nitropheny1)1,4 dihydropyridine3carboxylic acid dimethylester5carboxylic acid pentyl ester (MN9202) in biological medium by reversephase highperformance liquid chromatography.

目的：建立生物介质中1，4二氢2，6二甲基4(3硝基苯基)3，5吡啶二甲酸甲戊酯（MN9202）的高效液相色谱检测方法。

Urea inclusion method was adopted with a stepped temperature dropping to purify ω-3PUFA. The optimum ratio of ester-urea is 1 : 15. After first separation cycle, the content of ALA in perilla oil and the total content of both EPA and DHA in fish oil were increased to 85.68% and 67.32% respectively. With the increase of the urea amount, the contents of ALA and EPA+DHA can be further concentrated to 87.1% and about 70% respectively.

采用分步降温的尿素包合法富集多不饱和脂肪酸，在经济酯脲比1：15的条件下，经一次脲包富集后，紫苏油中的ALA含量由62.45%提高至85.68%，鱼油中EPA和DHA总含量由30.05%提高至67.32%；随着尿素用量的增加，ALA含量可高达87.16%，EPA和DHA总含量可超过70%。

PETN is a typical nitric acid ester of high explosive with good explosion property. It is chosen as the base of polymer bonded explosive.

PETN（季戊四醇四硝酸酯，又名太安）是爆炸性能优良的硝酸酯类高能炸药的典型，该研究将其选作高聚物粘结炸药中的墓炸药。

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。