查询词典 acid reaction

The effect of concentration of sulfonic acid and reaction temperature on sulfonating degree ware investigated.

主要用作高性能复合材料的树脂基和超级工程塑料、耐高温涂料等。

Methods The target compounds were prepared by using Pechmann reaction under catalysis by sulphamic acid and microwave irradiation. All the structures were confirmed by IR, 1H-NMR spectra.

在微波辐射和氨基磺酸的催化作用下经Pechmann反应得到相应产物，其结构经IR、1H-NMR波谱确证。

Taking the competitive and consecutitive azobenzene reaction between 1-naphthol and diazotised sulphanilic acid as an example calculated segregation index.

为旋转填充床用作液—液相混合反应设备打下了一定基础，希望最终能预测反应结果并指导试验和生产过程。

A new mathematical model is built based on the laminar flow model and coalescence and redispersion model. Taking the competitive and consecutitive azobenzene reaction between 1-naphthol and diazotised sulphanilic acid as an example calculated segregation index.

在层状扩散模型和聚并分散模型的基础上，建立了一个新的数学模型，以1—萘酚与对氨基苯磺酸重氮盐这一竞争串联偶氮化合反应体系为例，计算了反映微观混合状态的离集指数。

In the process of the sulphonate reaction, we use 1,2-dichloroethane as solvent and chlorosulfonic acid as the agent of sulfonation.

环化反应采用1，2-二氯乙烷作溶剂，用氯磺酸作磺化剂，在回流温度下进行磺化反应，3-十二烷基蒽醌磺酸的收率为85.75%。

Sulphonated carbon materials made from glucose were used as the solid acid and the support of Fe(superscript 2+) in the Fenton reaction, and the effects of the structure of carbon materials prepared by different methods on the Fe(superscript 2+) loading and the degradation efficiency of methyl orange were measured.

以葡萄糖为原料制备的磺化碳材料作为Fenton反应过程中固体酸及载体，研究了磺化碳材料结构对Fe(上标 2+)的负载能力及其对甲基橙降解反应的催化性能。

A series of sulphonated SBS were achieved by reacting SBS blockcopolymer with sulphuric acid, meanwhile, the blends of PVC andsulphonated SBS were studied. By means of strength capabilityexamination and DSC analysis, it was found the miscibility wasincreased after SBS was sulphonated.2 The chemical grafting of styrene and PVC membrane2.1 The reaction condition of graftingBy means of the swelling and seepage of Styrene to PVC film,St was grafted onto PVC film by the initiation of BPO .

采用硫酸对热塑性弹性体SBS进行磺化，得到不同磺化度的产物，并对其与PVC的物理共混进行了研究；通过力学性能及DSC测试，发现SBS磺化后增加了与PVC的相容性(来源：Af2a2a2BC论文网www.abclunwen.com)。2 苯乙烯与聚氯乙烯膜的化学接枝2.1 苯乙烯与聚氯乙烯膜接枝条件利用苯乙烯对PVC的溶胀渗透，在过氧化苯甲酚的引发下发生接枝共聚反应。

In order to minimize the pollution of the environment with waste acids and/or waste acidic salt solution, following measures were taken:(1) Instead of using excess sulfuric acid, sulfonation reaction was carried out in the presence of excess toluene and the water produced during the sulphonation was removed by azeotropic distillation.

在CLT酸生产中，为了使废酸和酸性废盐水对环境的污染减少到最低程度，采取了如下的措施：(1)与使用过量硫酸相反，磺化反应是在过量甲苯的存在下进行，同时用共沸蒸馏方法移出了磺化过程中产生的水。

The results indicated that the DNA damage could be accelerated by Fenton reaction in the presence of ascorbic acid but was inhibited slightly by hydroxyl free radical scavenger such as mannitol or dimethyl sulphoxide under the experimental conditions.

试验结果显示，抗坏血酸存在时可以加速Fenton反应对DNA的损伤，而在同样条件下，自由基捕获剂甘露醇或二甲基亚砜对由Fenton反应造成的DNA损伤的抑制作用却不是很大。

Keywords PE;chlorosulfonic acid;sulphuration reaction;hydrophilic property

聚乙烯；氯磺酸；磺化反应；亲水性

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。