查询词典 acid reaction

The results showed that during hydrogenation of rosin under the experimental conditions the dominant reaction was the formation of dihydro resin acids with minor products of tetrahydro resin acids and dehydroabietic acid.

证实在本实验条件下松香催化加氢过程中的主体反应是树脂酸的二氢化，只伴随少量的四氢化和极少量的脱氢反应。

The reaction of metallic tin with nitric acid was investigated in the presence of different types of technical surface active agents employing the thermometric method as developed by Shams El-din for evaluating the inhibition efficiency of different surfactants.

研究了有各类工业用表面活性剂存在条件下金属锡与硝酸的反应，采用Shams El-din建立的测温法评估不同表面活性剂的缓蚀效率。

A desulfurization method is proposed for the removal of sulfur compounds from FCC gasoline by alkylation reaction of thiophenic sulfur with olefins over acid catalysts, and the higher boiling sulfur-containing products are removed by fractional distillation.

选择以噻吩的甲基取代衍生物(包括 2-甲基噻吩、3-甲基噻吩及 2，5-二甲基噻吩)与异丁烯的烷基化反应为模型反应，考察了经三氯化铝气相固载法改性的 CT175 树脂催化剂催化噻吩的甲基取代衍生物与烯烃的烷基化反应性能。

Hydrochloric acid and thiosulphate solution react to give sulphur particles which can block the transmission of light. Under this merit, light sensor can be used to collect the corresponding experimental data. Analysing these data can help to find out the relationship between the concentration of solution and the rate of reaction.

由於氢氯酸与硫代硫酸盐溶液反应所释出的硫磺会影响光线进行，因此利用光度感应器便可收集有关的实验数据，透过这些数据的分析便可找出溶液浓度与这个反应速度的关系。

The effects of the reaction temperature , time ,pressure and air flow on the vield of o - toluic acid were evaluated on a medium sized Semi - coninuous bubbling bed reartor.

在中型半连续鼓泡床反应器上，评价了反应温度、反应压力、空气流量以及反应时间对邻甲苯甲酸单程收率的影响。

Rats were sacrificed at 0, 6, 12, 24 and 48 hours after reproduction of pancreatitis in both groups. The intestinal mucosal permeability was assessed with 99mTechnetium Diethlene Triamine Pentacetic Acid method, and the expression of substance P was evaluated with reverse transcriptase polymerase chain reaction and Western blotting analysis.

分别于制模成功后0、6、12、24和48 h处死两组大鼠，并留取标本；利用同位素法测定肠黏膜通透性，分别用逆转录-聚合酶链反应和蛋白质免疫印迹法检测P物质在肠组织中的mRNA和蛋白表达水平。

The first step was to synthesize imidazoline. The mole ratio of oleic acid and diethylene triamine was 1:1.2, the xylene was 30%. Temperature was controlled in about 160 ℃ on this stage, timing for acylation reaction was about 1.5 hours.

第一步咪唑啉的合成：油酸和二乙烯三胺摩尔比为1：1.2，以二甲苯为携水剂，反应温度控制在160℃酰化反应1.5小时，然后升温至220℃环化反应，反应时间6.5小时。

Catalyzed by indium tribromide as a Lewis acid catalyst, this reaction was completed smoothly in green solvent ethanol.

我们采用三溴化铟作路易斯酸催化剂，在绿色溶剂乙醇中顺利实现了该反应。

Reaction was stopped by adding 300 μl of 10% trichloroacetic acid and samples were incubated on ice for 30 min.

加入300 μl 10%的三氯乙酰酸来终止反应，然后将样品在冰中保温30分钟。

Trichloroacetic acid is a kind of short-stopper which can stop enzymatic reaction.

三氯乙酸是澳洲青苹PPO酶促反应有效的终止剂。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。