查询词典 alkali reaction

The immediate products of this reaction are alkali-metal derivatives of the dialkyl phenylmalonates.

此反应得到的产物为二烷基苯基丙二酸酯的碱金属盐衍生物。

It is characterized by that dissolving the isocyanuric acid in aqueous solution of alkali or emulsion, introducing chlorine gas into solution or emulsion respectively at 5-15 deg.C, then drop-adding liquid bromine, finally introducing chlorine gas to make chlorization reaction, and controlling pH value to 2.5-4 to obtain effective chlorine whose content is 54-58% and effective bromine whose content is 46-49%.

其特征在于：将异氰尿酸溶解于碱的水溶液或者是乳浊液中，然后在5～15℃之间分别向溶液或乳浊液中通入氯气、然后滴加液溴、最后通入氯气进行氯化反应，并把反应的最终pH值控制在2.5～4之间，得到总有效氯为54～58％、有效溴含量为46～49％的产品。

1H-NMR and UV analysis show that, after reaction, benzene ring in the structure unit of the alkali lignin is steady, carboxyl, carbonyl and methoxyl all have reduced in different extent, while aliphatic and phenol hydroxyl have increased.

1H-NMR和UV光谱分析显示反应后碱木质素的结构单元中苯环结构稳定，羰基、羧基、甲氧基有所减少，醇羟基和酚羟基的量增加了。

But the CRI and CSR index of coke, used at present, is measured under the atmosphere of no alkali. In the different conditions, alkaline or not, the results of the selective reaction of coke microstructure are different,especially sometimes just opposit...

有碱或无碱存在，对焦炭显微结构的选择性反应序列有时是相反的，并发现∑ISO具有比各向异性结构更强的高温抗碱侵蚀的能力，而前者主要来自气煤类煤，后者主要来自强粘结性煤，因此认为，为了增加焦炭中∑ISO的含量，适当降低对M40(M25)、M10的要求，以达到多用气煤类煤，并改善焦炭的实际质量是可行的。

The regularities of the influence of various factors includingreaction temperature,reaction time,the ratio of formaldehyde to acetaldehyde,the quantity of alkali and the concentration of formaldehyde on the yieldsof pentaerythritol and dipentaerythritol were studied.

通过单因素实验，考察了反应温度、反应时间、甲醛与乙醛的配比等因素对单、双季戊四醇收率的影响。

The occurrence of deleterious alkali-carbonate reaction and performance of certain aggregates were determined by detailed petrographic examination of the aggregates in destructive concrete'structures.

在对材料制备过程的研究中，通过对溶胶—凝胶过程及干凝胶不同烧成温度的物相变化的研究，结合热力学函数方法的计算结果，提出了多组份溶胶的形成过程、溶胶的干燥过程、凝胶的烧成过程中的主要物相的生成反应。

Adverse effects of the alkali-aggregate reaction can be minimized by adding a fine pozzolanic material to the concrete mix.

碱集料反应的不利影响可通过向混凝土拌和物中加火山灰质材料来降至最小。

The diffirences about the promotion mechanism of methanol to PCBs decomposition are found between SCWO and SCWT. The dechlorination reaction was accelerated due to the decrease of HCl which produced in the dechlorination process by the neutralisation of HCl with alkali catalyst.

发现在超临界水氧化与超临界水裂解条件下CH3OH对PCBs降解反应的促进机制有所不同，碱催化剂通过中和反应过程中产生的HCl生成NaCl沉淀导致体系中Cl的含量降低，从而促进脱氯反应的进行。

The initial pH of reaction solution had little influence to the degradationefficiency, but in alkali solution, methylene blue degraded easier than in acid or neutral solution.

亚甲基蓝降解率随超声时间的增加而增加；溶液的pH值的变化对亚甲基蓝降解的影响不大，但是在中性溶液中，其降解率稍高于酸性或碱性溶液中。

Viscose manufacturing process involves the reaction of cellulose with sodium hydroxide to form an alkali cellulose.

粘胶的生产过程包括纤维素与氢氧化钠反应形成碱纤维素的过程。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷