查询词典 reaction formation

First, the speed of the reaction between mud acid and rock is very fast, the effective distance of acid is short, active acid can not reach deep formation.

首先，高温下常规土酸与地层矿物反应速度极快，酸液有效作用距离短，活性酸不能到达地层深部；其次，HF与铝硅酸盐的化学反应不是简单的一次反应，其副产物氟硅酸和氟铝化物还可与铝硅酸盐发生二次反应和三次反应，形成一系列不溶性的沉淀物，对储层造成严重伤害；第三，高温情况下酸液对井下管柱及工具腐蚀性很强，对缓蚀剂性能要求高。

The results show that acrolein appears at the beginning of the reaction, but acrylonitrile appears earlier when the temperature is higher which indicates that the formation of acrylonitrile takes some time.

研究发现，反应开始阶段即有丙烯醛生成，而丙烯腈随反应温度的升高，出现的时间变早，说明丙烯腈的生成需一定的时间。

In Figure 6, the action spectrum of the NR formation (filled circles; 10-min magnified profiles) and the absorption spectrum of the benzophenone-containing reaction solution are shown.

在图6 ，行动频谱的二○○形成（填补界； 10分钟放大概况）和吸收光谱的二苯甲酮含反应液中显示。

Rhodium-catalyzed asymmetric 1,4-conjugate addition reaction is one of the most efficient methods for the carbon-carbon bond formation.

铑催化不对称1，4-共轭加成反应是一种非常有效的碳—碳键形成方法。

Cellulase activity in adventitious roots of maize during aerenchyma formation induced by flooding was located through the reaction of Benedict＇s reagent with reducing sugars liberated by hydrolysis of carboxymethylcellulose.

采用本氏试剂与羟甲基纤维素水解还原糖反应的细胞化学方法，对玉米不定根淹水诱导形成通气组织过程中，逐步解体的皮层细胞内纤维素酶活性进行了定位观察。

Write the structure of the product of the low temperature reaction of anthracene with Br2.CCl4 and propose a mechanism for its formation.

答：1写出在低温下蒽与Br2-CCl4的反应产物，并写出反应历程。

Two reaction pathways involving the formation of the complexes CH2CHCHFCH2 and CH2CHCHCH2F were found in this reaction.

计算中发现，这个反应体系有两个形成中间复合物的通道。

On the other hand, steam can be used to restrain the side reaction such as hydrogen transfer reaction so as to increase the yield of light olefins by diluting the concentration of the reactant. In addition, minor steam can react with the feed hydrocarbon resulting in the decrease of coke and the formation of active hydrogen without the increase of hydrogen gas and light saturates that is not desirable.

另一方面，水蒸气不仅仅具有降低烃分压的作用，抑制了氢转移反应等副反应，对于低碳烯烃的产率有好的影响，而且在反应过程中，少量参与了反应，与烃类发生了水煤气反应，生成了活泼氢，不仅降低了焦碳的产率，并且没有提高氢气、低碳烷烃等不希望得到的产物。

The preparation mechanism of the product was explored through the formation of primary nuclei, the processing of autocatalytic reaction, the low atomic diffusion rate, low heat fluctuation and the spatial isotropy in reaction solution.

从初核的形成、自催化反应的持续、低温下原子的低扩散率和热涨落以及反应溶液中空间各向同性等角度对低温法形成均匀球状Ni-P纳米金属玻璃的机制进行了探讨。

Single component and multi\|component of iron system colloidal catalyst \Ali\|Bu\-3CH\-2CHCH\-2Cl\ were mixed by different ratios in hydrogenated gasoline medium at 25℃.This paper studied the relationship between the nonaqueous systematic electroconductivity and the concentration of catalyst components.In combination with Tyndall effect,polymerization experimental results,Ali\|Bu\-3 existed in associated state and dissociated into ionpair.The reaction between Ali\|Bu\-3 and Fenaph\-2 was the main reaction which formed colloidal core.Ali\|Bu\-3 reacted on CH\-2CHCH\-2Cl and Ali\|Bu\-2Cl was yielded which joined the formation of active center on the surface of colloidal core.The excessive Ali\|Bu\-3 was dissociated into ionpair which formed double electrode layer,and the double electrode layer kept the colloidal particles relatively stable.

研究了在25℃加氢汽油介质中，铁系胶体催化剂［Fenaph2Ali-Bu3―CH2==CHCH2Cl］单组分、多组分按不同配比混合，非水体系电导率与浓度的关系，结合Tyndall效应，聚合实验结果，得出Ali-Bu3以缔合状态存在并解离成离子对它同环烷酸亚铁的作用是形成胶核的主要反应，与氯丙烯反应生成的氯化异丁基铝，在胶核表面参与形成活性中心由过量Ali-Bu3解离的离子对形成的双电层结构，使胶粒保持相对稳定。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。