查询词典 acrylic aldehyde

Their structures were characterized as dihydroconiferyl dihydro-p-coumarate, vanillin, apocynin, p-hydroxybenzaldehyde, syringaldehyde, syringic acid, syringylethanone,α-hydroxypropiosyringone, coniferyl aldehyde, dihydroconiferyl alcohol, 2-hydroxyphenylpropanol, and 3-hydroxy-4-methoxy-phenylethanol, respectively.

结果 从该植物中分离得到12个酚性化合物，其结构分别为二氢松柏醇二氢对羟基桂皮酸酯，香草醛，罗布麻宁，对羟基苯甲醛，丁香醛，丁香酸，丁香乙酮，α-羟基丁香丙酮，松柏醛，二氢松柏醇，2-羟基苯丙醇和3-羟基－4-甲氧基苯乙醇。

The preparation of polymer is required for high purity of glycolic acid, if not, low-weight polymer is obtained, therefore, high purity glycolic acid is scarce in the market. So, the research for the synthesis of glycolic acid is essential. In domestic and overseas, there are many methods for preparation of glycolic acid, including glycin oxidation, cyanogenesis, aldehyde oxidation, coupling of maldehyde and methyl formate, oxalic acid electrolysis, chloroactic acid hydrolysis and so on.

制备羟基乙酸的聚合物时，对羟基乙酸单体的纯度要求较高，否则得到的聚合物分子量较低，导致高纯度羟基乙酸的需求量逐年增长，目前在国内，高纯度的羟基乙酸还没有形成工业化规模生产，对羟基乙酸的合成进行研究是非常有意义的。

The presence of high temperature, middle oxidizer and dissolved oxygen oxidized alcohol into aldehyde and acetic acid; decompound of ester was concomitant with esterification.

此外，蒸馏过程中还发生物质的分解，由于高温、中间氧化剂和溶解氧的存在，使酒精氧化成乙醛和乙酸，酯化作用的同时发生酯的分解。

Under the condition of Gasi Oilfield, the formulation of motive polymer gel were as follows: 1500mg/L polymer HPAM + 400 mg/L organic phenolic aldehyde + 150mg/L stabilizer and 80 mg/L deoxidant.

在尕斯油田油藏条件下，研制出的可动凝胶配方体系为：1500mg/L聚合物HPAM+400mg/L有机酚醛+120mg/L稳定剂+80mg/L除氧剂。

Pinacol reductive coupling reaction of aldehyde and ketone is one of the most important methods in forming C-C bond, which may also produce vicinal diol as valuable intermediate compound applied in the synthesise of natrual products.

醛酮的Pinacol还原偶联反应是合成C—C键的重要方法之一，同时合成的邻二醇类化合物是重要的有机合成中间体，已被应用于许多含有邻二醇结构的复杂天然化合物总合成中。

Brandy quality could be evaluated through the measurement of pH value, total phenol, colority, catechin, aromatic aldehyde and aromatic acids, Cu content, flavoring compositions, Einstein shift in ultraviolet spectrum, and non-alcohol volatile substances content in Brandy.

可通过测定白兰地的pH、总酚、色调以及儿茶素；芳香醛及芳香酸类物质；紫外光谱的"红移"现象；白兰地中的铜；白兰地中的香气成分；非酒精挥发物总量来评价酒质量。

Aldehyde dehydrogenase is a kind of endoenzyme and cell-breaking is one of the key procedures in the extraction of ALDH from S. cerevisiae.

乙醛脱氮酶是一种胞内酶，在从酵母中分离提取ALDH的过程中，破碎细胞是其中的关键步骤之一。

Aldehyde dehydrogenase is a kind of endoenzyme and cell-breaking is one of the key procedures in the extraction of ALDH from S.cerevisiae.

乙醛脱氢酶是一种胞内酶，在从酵母中分离提取ALDH的过程中，破碎细胞是其中的关键步骤之一。

One pot synthesis of tetrahydroquinolines from aldehyde, aniline and enol ethers catalyzed by iodine was also applicable and provided tetrahydroquinolines in comparable yields.

在碘的催化下，从醛、苯胺和烯醇醚出发"一锅"合成了四氢喹啉衍生物，反应的产率与使用预制的亚胺进行的反应基本相同。

In addition, ioding was found to be an efficient catalyst for the imino Diels-Alder reaction of N-arylimine and enol ethers and the reaction provided tertrahydroqinolines in good yields. One pot synthesis of tetrahydroqinolines from aldehyde, aniline and enol ethers was also achieved using iodine as the catalyst. The chemical yield of the"one pot"reaction was comparable with that obtained using preformed N-arylimine.

此外我们也发现碘能够有效地催化N-芳基亚胺与烯醇醚的Diels-Alder反应，以很高的化学收率得到了四氢喹啉衍生物，并且发现碘也能够直接催化芳香醛、苯胺、烯醇醚的三组分"一锅"反应，获得的化学产率与使用预制的N-芳基亚胺相当。

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。