查询词典 condensation

This approach can circumvent gelation occurred in the classical condensation polymerization of A〓 and B〓.

这种方法巧妙地避免了在通常情况下A〓+B〓单体的缩聚反应中的交联反应。

Because of rigorous theory is lack, method that metal plastic stream is supposed through geometric proportion condensation, makes that cell quantity of the partition complex special-shaped product and disperse dots of die surface are many, reduce regression precision of streamline die design, sometimes can't be built mathematics module and its optimization.

由于缺乏严密的理论支持，仍假设金属流动按等比压缩方式研究，致使复杂拔挤异型材划分等比率单元过细及描述模腔曲面的离散点过多，降低了流线模设计的回归精度，甚至无法建立模腔数学模型及其优化。

Objective: To compare the therapeutic efficacy of the warm gutta-percha Trifecta technique and the cold later condensation technique.

目的：比较Trifecta热牙胶充填技术和冷牙胶侧方加压充填技术用于根管充填的治疗效果。

There was no significant difference in microleakage between differently tapered gutta-percha using continuous wave of condensation technique.

连续波充填技术微渗漏小于侧方加压技术，不同锥度牙胶配合连续波充填技术的微渗漏无显著性差异。

There are other peaks such as Bose-Einstein condensation, fractional Hall effect, and more.

还有其他峰如玻色-爱因斯坦凝聚，分数霍尔效应，而更多。

In this paper, the six typical reactions of LA were reviewed, including salification, esterification, hydrogenation, condensation, oxidation and halogenation.

乙酰丙酸是生物质资源直接水解的重要产物，可以用可再生资源大规模制备。

In the part two, we reported the classical Knoevenagel condensation between aromatic aldehydes and acyclic active methylene compounds or cyclic active methylene compounds containing heteroatom such as (2-thio)barbituric acid, Meldrum's acid using ionic liquids as reaction medium.

在第二部分中我们研究了离子液体中开链活性亚甲基化合物、杂环类活性亚甲基化合物如(2-硫代)巴比妥酸、Meldrum's酸与芳香醛之间的Knoevenagel缩合反应。

When the mesostructure is basically formed, the pH value of the reaction system is adjusted to 7-8 and then the hydrothermal crystallization is prolonged for some time to obtain heteroatom-incorporated mesoporous silica. The aim of adjusting pH value to near neutral is to change heteroatom species from the cationic to oxo form and therefore can enter the mesoframework through condensation with silanol groups in the wall.

该方法主要的特点是：操作简单（以调节体系pH值代替繁琐的后处理过程），效率高（可以得到Si/Al=5且铝物种全部处于四配位的骨架位置的Al-SBA-15），不破坏产物有序结构（产品具有高度有序的介孔结构），具有普遍性（适用于多种杂原子的掺杂如铝、钛、钒）。

The Catalyst used for preparation of carbodiimide from condensation of isocyanate were reviewed in this paper, including phosphorus-containing heterocycle compounds, phosphonate,organic metal compounds and polymer-grafting solid catalysts.

综述了异氰酸酯缩合生成碳化二亚胺催化剂的开发现状，包括磷杂环化合物、磷酸酯类化合物、金属有机化合物、聚合物接枝固相催化剂4大类。

The new compound,2- oxo-propionic acid p-carboxylphenyl hydrazone,was synthesized by the condensation reaction of 2- oxo-propionic acid and p-carboxylphenyl hydrazine which was prepared from p-aminobenzoic acid by diazotization and reduction.

以对氨基苯甲酸为原料，经过重氮化反应和还原反应，合成了对羧基苯肼(2)；2与2-羰基丙酸缩合得到新化合物2-羰基丙酸缩对羧基苯腙，其结构经UV，荧光光谱，1H NMR，13C NMR，IR和元素分析表征。

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