反应时间

The results show that the effect of quantity of initiator 、 dosage ratio between persulfates and Sodium Thiosulfate、reaction temperature、reaction time、crosslinking agent and the dosage of NaAA onGR、GE and WAR is significant.

实验结果表明：引发剂用量、反应温度、时间、和单体用量在制备腻子型吸水膨胀天然橡胶中对天然橡胶的接枝率有显著的影响，在本实验研究范围内的最佳工艺为：反应温度为40℃，反应时间为1小时，引发剂用量为0.50%，单体用量为100%，交联剂用量为2.00×10-4mol。

The effects of transition metal salt catalyst,reaction temperature and time on the yield of resorcinol were investigated.

考察了过渡金属盐催化剂、反应温度、时间等对间苯二酚收率的影响，结果表明在催化剂与硫酸摩尔比0.008∶2、反应温度220 ℃，反应时间9 h条件下，间苯二酚收率达到90.2%。

It is pointed out that under the condition of the temperature of 1120℃, the reaction time of 16 mm and the carbon content of 27%, the metal transformation rate of sponge iron used for general metallurgy is up to 90%. But the optimal carbon content is 29% for iron sponge to treat DSD acid oxidation wastewater. Under condition of the wastewater's pH value of 3 to 5 and the reaction time of 40min, the removal rates of COD and color are 68% and 90%, respectively. The BOD/COD ratio is up to 0.425 when DSD oxidation acid water is treated with sponge iron.

研究表明：在配碳量27%、反应温度1160℃、反应时间16min的情况下，以铁泥为原料制备的常规海绵铁的金属化率可达90%以上；用于处理DSD酸氧化废水的海绵铁适宜配碳量为29%，用制备出的海绵铁处理DSD酸氧化废水，在pH值3~5、反应时间40min时，出水的COD去除率可达68%、色度的去除率达90%、可生化性指标BOD/COD提高到0.425。

In chapter one, we introduced Ylides in brief and reviewed the methods 、 mechanisms and stereochemistry of the Wittig reaction.

第二章水相中的Wittig反应主要是半稳定Ylide和苯甲醛及各种取代苯甲醛在水相中的Wittig反应作了初步探索，考察水相中的反应条件，如反应时间，反应温度以及碱对水相Wittig反应的反应产率和立体化学影响。

The effects of feeding way of phosphorus pentoxide, ratio of C8H174OH to P2O5, reaction temperature and time on the synthesized isooctanol polyethenoxy ether phosphate were investigated. Its optimum synthesis technology conditions were as follows: feeding at batches while stirring tempestuously at 45℃, the ratio of nC8H17(EO4OH:n(P2O5)=2:1, esterifying at 70℃ for 4h, and add given volume of water at 70℃ for hydrolysing 2h.

研究五氧化磷的投料方式、反应物的用量比、反应温度和反应时间等因素对合成的异辛醇聚氧乙烯醚C8H17(EO4OH磷酸酯性能的影响，得到优化的异辛醇聚氧乙烯醚磷酸酯的合成工艺条件：在强烈搅拌下，分批投入P2O5，加料时的温度不超过45℃，nC8：H17(EO4OH：n(P2O5)=2：1，酯化温度为70℃，酯化时间为4h，在温度70℃时加入定量的水再水解2h。

Various reaction parameters such as ratio of ethyl acetoacetate to ethylene glycol,catalyst amount,reaction time and water-carrying reagent amount were studied.

讨论了酯醇比、催化剂用量、反应时间、带水剂用量对酯化率的影响。最佳反应条件为：n：n=1：1.8，催化剂用量为乙酰乙酸乙酯质量的2%，带水剂用量为20mL，反应时间3h。

Amination reaction was carried out at temperature of 90℃ to 150℃ for 2h to 10h and then ashless dispersant of polyisobutylene succinimide would be obtained after dehydration with the operations of vacuum distillation and filtration.

结果发现，实验在N_2保护下进行，BPO／PIB质量比为0.035，MA／PIB摩尔比为1.3，反应温度为150℃，反应时间为12h，搅拌速率为250rpm，引发剂过氧化苯甲酰以丁酮为溶剂分六次，时间间隔为30分钟，均量地加入反应器时，烃化反应物聚异丁烯的转化率最高。

Bromothiophene was synthesize d from thiophene through bromination to give 2,3,5-tribromothiophene,then reduced by Zinc in acetic acid.

以噻吩为原料，先和溴素反应合成2，3，5-三溴噻吩，再以锌作还原剂在乙酸溶剂中反应得到3-溴噻吩，主要研究了第一步反应时的原料配比对反应的影响及第二步的反应时间对反应的影响，反应总收率达72.6%。

Cellulose acetate butyrate with high or low degree of butyryl substitution was synthesized in heterogeneous system(butyric acid/ acetic acid/ butyric anhydride/ sulfuric acid) using the "free solvent" method. The effect of activation time, esterification time, the molecular weight of cellulose and the content of the organic acid or anhydride on the degree of acetyl and butyryl substitution of cellulose was discussed.

在非均相体系中进行酯化反应，采用&反应性溶剂&，以硫酸作为催化剂合成出从高丁酯含量到低丁酯含量的纤维素醋酸丁酸酯，研究有机酸以及酸酐的添加量、活化时间、酯化反应时间以及原料纤维素的分子量对酯化产物纤维素醋酸丁酸酯的影响。

Near-critical water is a promising reaction medium for conducting the hydrolysis of nitriles without the addition of any additives.

亚氨基二乙腈在没有外加催化剂的近邻界水中可以顺利发生水解。实验测定了亚氨基二乙腈在近临界水中(压力10MPa，温度200~260℃，反应时间10~60min)的水解反应动力学数据并考察了时间、温度、压力和初始反应物/水比对反应物转化率和产物产率的影响。

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。。。。