查询词典 acetacetic ester

The production process of fatty acid methyl ester with high acid value acidulated oil and fatty acid replaced superior quality fat and oil by high temperature gas phase method and supplemental ester translation process was also introduced.

对间歇式酯化-酯交换工艺进行了具体分析，并着重介绍了采用高温气相法及补充酯交换工艺，以高酸值酸化油和脂肪酸代替高档油脂生产脂肪酸甲酯的生产工艺。

The content of xanthophyl fatty acid ester obtained is 70-80%, wherein the content of all-trans xanthophyl ester is 90-95%.

用本发明方法得到的叶黄素脂肪酸酯含量为70～80％，其中全反式叶黄素酯达90～95％。

The synthesized high ester valuePVSK was characterized and compared with high ester value PVSK sample from Japanese company.

用红外光谱法对合成的高酯化度PVSK进行了表征，并与日本生产的高酯化度PVSK进行了比较。

The effect of single factor indicated that lower concentration of tea polyphenols and oxidant, temperature, ester proportion and pH value, shorter reaction time were favorable to the formation and accumulation of TFs, higher concentration of tea polyphenols, temperature, ester proportion and pH value, longer reaction time were favorable to the formation and accumulation of TRs.

借助参数模型研究各参数因子对TFs和TRs形成的影响，结果表明：茶多酚浓度、温度、酯比例及pH值对TFs和TRs形成与积累均有显著影响，反应时间对TFs影响显著，氧化剂对TRs影响显著；单因素效应显示：较低的茶多酚和氧化剂浓度、适当的低温和较短的时间、低的酯比例和pH较有利于TFs形成与积累，而有利于TRs形成与积累的参数则相反。

The advantages of catalytic synthesis of oxalate ester in gaseous phase by carbon monoxide are summarized. The five important characterization of our patent technology invented for the use of industrial raw material and the potential good economic value of the process are presented. It indicates that study and development of catalytic synthesis of oxalate ester .oxalic acid as well as glycols by natural gas in gaseous phase have a great advantage for full utilization of natural gas....

概述了&CO气相催化合成草酸酯&技术的先进性，介绍用工业性原料为主要内容的专利技术：&气相催化合成草酸酯连续工艺&的五个主要特点及其潜在的经济效益，并指出，用天然气经合成气进行气相催化合成草酸酯和草酸、乙二醇的研究与开发，可使天然气得到充分的利用，具有很好的经济效益，是天然气化工综合利用的一条有效途经，也是当代C1化学的重要发展方向。

The invention relates to a preparation and separation method of docosapentaenoic acid methyl ester and docosahexaenoic acid methyl ester.

本发明涉及二十二碳五烯酸甲酯和二十二碳六烯酸甲酯的制备和分离方法。

The methyl ester of this oil, rapeseed methyl ester, can be used in unmodified diesel engines and is sometimes known as biodiesel.

菜籽油中的甲酯，即菜籽油甲酯，可用於未改造的柴油发动机上，因而有时被称为生物柴油。

With the aid of 〓P NMR examination for the process and ESI-MS/MS analysis of the derivatized products from the reaction intermediate, it is found that the corresponding phosphoryl chloride is generated after mixing the hydrogen phosphonate derivative with chlorodiisopropylamine, and they react with amino acid, amino acid methyl ester, dipeptide methyl ester or N-methyl imidazole carboxyl alkyl diamine respectively to form the desired products.

利用〓P NMR对反应过程监测以及对反应中间体衍生化后产物的ESI-MS／MS检测分析发现，氢亚磷酸二酯与氯代二异丙胺反应首先生成了磷酰氯中间产物，它继续与氨基酸、氨基酸甲酯、二肽甲酯、1-甲基咪唑-2-酰基烷基二胺等反应生成了目标产物。

The process method of kaolin was introduced using A-151 and ester titanate coupling agent. Effect of dosage of A-151 and ester titanate coupling agent on stretch strength and modulus, bending strength and modulus , impact strength of UPR was investigated.

介绍了用A - 15 1与钛酸酯偶联剂处理高岭土的方法，研究了处理剂的用量与偶联高岭土的加入量对UPR的拉伸强度和模量、弯曲强度和模量以及冲击强度的影响。

In this research, leaves of maize grown on soil pots and vermiculite pots were treated with jasmonate methyl ester, salicylic methyl ester and third instar larvae of the maize stalk borer and were assessed for the effect on the contents of DIMBOA and phenolic acid, and the expression of defense genes in leaves and roots, the content and species of root exudates and the diversity of rhizosphere bacteria community.

本文通过土壤盆栽、蛭石盆栽实验，用化学分析和分子生物学方法研究不同浓度茉莉酸甲酯、水杨酸甲酯及玉米螟3龄幼虫处理玉米（粤农9号）叶片对叶片和根中丁布、酚酸及防御基因的表达量的影响；且探讨处理之后根系分泌物的种类和组分及土壤细菌群落多样性的变化。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"