反应时间

For that question: how a probability event becomes to be a certainty event after some time.The answerer is that the Probability is changing along the development of time since many factors will affect the Probability in that time interval and Probability=1 at the point it happened.

又如生化反应，在刚开始的时候，那些化学物质发生反应的概率可能很小，加入催化剂（或者即使不加入催化剂，由于各物质的溶度随着反应进行，时间的推移而改变）影响着后来某一时刻这些化学物质能否完全反应。

The effects of the composition of catalyst (the structure and amount of bident ligand and strong acid, the cocatalytic activity of Cu〓, the roles of methanol and phenol etc.) and the copolymerization condition (the reaction time, temperature, amount of ST and CO, the structure and amount of solvent etc.) on catalytic activity were studied. The principle of the copolymerization was investigated.

研究了催化体系组成（含氮双齿配体的结构与用量、强酸的结构与用量、铜盐的助催化作用、甲醇和酚类化合物作用等）和共聚反应条件（共聚反应的温度与时间、溶剂种类与用量、苯乙烯与一氧化碳量等）对溶液共聚反应的催化活性的影响，探索溶液聚合反应规律。

Two representative compounds have been determined by X-ray crystallography. The best ratio of reactants, the adequate reaction temperature and solvent have been found by contrast experiments.4. The better photoreaction conditions and irridation times have been confirmed through the different photoreaction results. It is the first time that fifty quinazoline derivatives with biological activity and four photooxidation products with urea functional groups have been obtained by photochemistry method. Two representative compounds, quinazoline derivatives and photooxidation products, have been determined by X-ray crystallography, respectively.

通过实验对比我们找到了较佳的反应物的投料比、反应温度和反应所用的溶剂。4、根据不同条件下的光反应结果，确定了硫脲衍生物的相对较好的光反应条件和光照时间，首次利用光化学手段成功得到50个具有生物活性的喹唑啉衍生物和4个具有脲基官能团的光氧化的产物，测定了两个具有代表性的喹唑啉和光氧化的产物的晶体结构。

The results demonstrated that the fractional conversion and reaction rate were rapidly increased in the initial curing reaction. The higher the curing temperature, the higher the fractional conversion and reaction rate was. With increasing of the curing temperature and time, the fractional conversion and reaction rate decreased and became constantly. The initial curing reaction was a first order reaction. The apparent activation energy and frequency factor of curing reaction used G- capryl ester was bigger than that of used G-oligomer.

结果表明：固化体系在研究的固化温度下，转化率和反应速率在固化反应初期增加快速，温度越高增加越快，随着固化时间的延长，这种变化逐渐变慢，并最终趋于恒定；初期固化反应为一级反应，反应初期的表观活化能和指前因子大小顺序为G-预聚体＞G-辛酯。

The results showed that the synthesis reaction was biphasic, because of the presence of the intermediate product dicalcium phosphate dehydrate. The second step reaction occurred just at the end of the first one and ended rapidly in less than 30s, which was called as explosive reaction. The pseudo-Avrami equation was used to describe the reaction processes.

结果表明，合成过程为生成中间产物二水磷酸氢钙的两步式反应，其中第二步反应在第一步反应结束后才开始，并且在很短的时间内(0s)迅速完成，即发生了&爆炸式&反应，反应过程可用类Avrami方程进行表征。

The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of Sodium tetraphenylborate (NaBPh4) with carboxylic anhydrides catalyzed by Pd(PPh3)2Cl2 in THF was first reported.

第二章：微波辐射下Pd配合物催化NaBPh_4与羧酸酐的偶联反应研究本章中我们在微波辐射条件下，研究了PdCl_2(PPh_3)_2催化NaBPh_4与羧酸酐偶联反应，合成出了十种不对称芳酮，并分别考察了微波辐射功率、辐射时间、溶剂和原料配比等因素对反应的影响，优选出了较佳的反应条件，并根据文献及实验结果，讨论了可能的反应机理。

The Suzuki reaction, the coupling of organoborate compounds with organic electrophiles catalyzed by Palladium complexes, is a valuable Csp2-Csp bond forming reaction. The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of phenylboronic acid with benzyl halides catalyzed by Pd(PPh3)2Cl2 DMF/H2O(v/v=10 : 2) was first reported.

第四章：微波辐射下Pd配合物催化端烯与芳卤偶联反应研究本章中我们在微波辐射条件下，研究了PdclZ(P Ph3)：催化端烯与芳卤的偶联反应，合成出了七种乙烯基化合物；并分别考察了微波辐射功率、辐射时间、原料配比、和PTc等因素对反应的影响，优选出了较佳的反应条件，并根据文献及实验结果，讨论了可能的反应机理。

The characteristics of on-off responses of medial geniculate body neurons to tone bursts of varying frequency, intensity and duration were affected by lateral amygdaloid nucleus stimulation, which was in form of altering the pattern of discharge or complete suppression. The effect also varied with the changes of the interval between amygdaloid stimulation and the tone bursts. The results of the present work show that LAm could modulate temporal processing of auditory information.

新西兰兔内膝体神经元的on-off反应与纯音刺激的强度、频率及作用时程有关；刺激边缘系统杏仁外侧核，可以抑制on-off反应，或是使on-off反应放电构型发生变化。on-off反应是神经元对声音信号作用时程及声音的起止进行编码的方式之一，LAm对on-off反应的影响表明，边缘系统杏仁体的活动可以调控听觉中枢对声音时间信息的编码。

The primary amine of DETA is closed by ethyl methyl ketone to reduce the reactivity of –NCO group and –NH2 group and smooth the reaction process. The mole ratio value of –NH2/-NCO should be 2.2 to make sure that –NCO group is completely closed in by –NH2 group and amine terminate compound is prepared. The reaction temperature, reaction time and the way of adding raw materials to vessel are discussed. Structure and performance of the resin are analyzed with infrared ray spectrum.

用甲乙酮封闭DETA分子中的伯胺基团，降低-NCO与-NH2的反应活性，使反应平稳进行；研究投料比和投料方式对反应的影响；为确保生成以氨基封端的聚氨酯树脂，并将游离的异氰酸酯反应完全，最佳原料投料比控制在-NH2/-NCO=2.2；确定合理的合成条件如反应温度、时间等；利用红外光谱分析端氨基聚氨酯树脂的结构与性能。

DSC thermo-analysis showed that both of epoxy resins and blended resins had an exothermic peak during the period of thermal-scanning due to the curing reaction. Comparison between different kinds of liquefied wood, blending resins that using the liquefied Japanese cedar of LW-C as the raw material would undergo more degree of cross-linking reaction. They released more reaction heat, and formed a more complete cross-linking structure. However, heat treatment could promote an advanced cross-linking reaction of room temperature cured resins. DSC isothermosetting analyses showed that the curing reaction of both epoxy resins and blended resins conformed to Arrhenius kinetic model. The time needed to achieve 95% of curing reaction was shorter for blending resin than that of epoxy resin.

由DSC热分析显示环氧树脂与掺合树脂在热扫描过程中均出现硬化反应放热峰，其中以液化柳杉LW-C为原料之掺合树脂在硬化过程可进行较多之架桥反应，其反应放热量较大，硬化树脂之架桥结构较完整，而加热可促进常温硬化树脂进一步之架桥反应；由DSC等温硬化性分析显示环氧树脂与掺合树脂之硬化反应均符合Arrhenius动力学模式，添加液化柳杉之掺合树脂达95%硬化率所需时间较环氧树脂短。

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。。。。