查询词典 chain reaction

We find that the chain transfer reaction between oligomeric radical cations and monomers is the key to elucidate these questions.

我们根据实验结果并借鉴前人的经验，指出低聚物阳离子自由基向单体的链转移是诠释这一切问题的关键。

The results show that the degradation effectiveness of PVA was optimum when potassium ferrate and sodium hypochlorite were jointly used as the oxidative agent. The removal rate of PVA and COD was more than 98% and 40% under the conditions that the concentration of PVA was 3.0 g/L and the pH value was 7.2, the dosage of potassium ferrate and sodium hypo chlorite were 0.32 g/L and 3.92 g/L, and the reaction time was 50 min. In the process of united oxidative degradation, the chain of PVA was cut off and many low molecular weight compounds were formed. The main degradation products were carboxyl compounds.

结果表明，用高铁酸钾与次氯酸钠联合氧化PVA时，降解效果最佳；在3.0 g/L，pH值为7.2的PVA溶液中，当高铁酸钾与次氯酸钠的投加量分别为0.32 g/L、3.92 g/L，反应时间为50 min时，PVA的去除率大于98%，COD去除率大于40%；在联合氧化降解过程中，PVA断链成小分子物质，最终降解产物主要为羧基化合物。

It was attributed to the formation of a boundary lubricant film well-bonded on the rubbing steel surface by way of adsorption and tribochemical reaction under heavy load,owing to the polar-group of molecular adsorbed onto the metal surface,and the hydrophobic long chain alkyl formed the absorbed film.

这可能是由于N-油酰基谷氨酸三乙醇胺盐中的极性基团吸附在钢球表面、长碳链疏水性烃基在金属表面形成较厚的保护膜、在较高载荷条件下发生化学反应并形成高强度摩擦化学反应膜的缘故。

In this way you can have a chain of reactions and accept each reaction as freedom.

这样你就有了一连串的反应，你可以把每个反应都当作自由。

The radical inhibition experiment indicated that the reaction is an excellent radical chain process initiated by single electron transfer.

自由基抑制实验证明反应是通过单电子转移引发的自由基链反应的过程。

Also known as Step-Growth Polymerisation. A way of making polymers in which every polymer chain grows continuously through the course of the reaction, remaining quite small until almost all the monomer has reacted.

缩合聚合又称作逐步聚合，每一个聚合物链都是通过一个反应过程连续增长的，在这个反应过程中，聚合物的分子量是与单体的转化率成正比的。

A common initiator used to start chain growth polymerisation. It undergoes a decomposition reaction at the peroxide bond.

过氧化二苯甲酰：用于引发链增长聚合的常用过氧类引发剂，引发时过氧键断裂分解。

To the preparation of the side chain, we exploit Sharpless Asymmetric Epoxidation, Grignard reagent epoxide opening and selective hydroboration reaction as key steps.

在探索制备手性六元环的过程中，发展了一种高效制备手性砌块49的方法，并利用乙烯基格氏试剂对49的不对称Michael加成制备了手性六元环56。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。