反应率

The optimal reaction conditions were as follows: the molar ratio of propanol to acid was 1:1, the mass ratio of the catalyst used to p-nitrobenzoate was 6%.

合成硝基卡因的最佳工艺条件为：醇酸比为1：1，催化剂的用量为对硝基苯甲酸的6%，在回流温度下反应14h，产率达到79.5%。

Under optimum synthetic con dition, the yield of propyl ester was 93.5%.

在最佳反应条件下，尼泊金丙酯的产率为93.5%。

Study on Surface Enhanced Raman Scattering of Piperidine;2. Using piperidine as catalyst and ethanol as solvent, a series of new 2-amino-3-cyano-4-aryl-6-methoxy-1,4,9,10-tetrahydronaphtho[2,1-b]pyran derivatives were synthesized by one-pot reaction of aromatic aldehydes, malononitrile and 7-methoxy-1,2,3,4-tetrahydronaphthalen-2-one at room temperature in good yields.

以芳醛、丙二腈和 7 甲氧基 1，2 ，3 ，4 四氢萘 2 酮为原料，在六氢吡啶催化下以乙醇为溶剂，在室温合成了一系列新的 2 氨基 3 氰基 4 芳基 6 甲氧基 1，4，9，10 四氢萘并 [2 ，1 b]吡喃衍生物，反应条件温和，产率较高，并通过IR ，1HNMR和元素分析表征产物的结构，还通过单晶X射线衍射分析确证产物的构

The influence of the position of amino associated with pyrimidine on the reaction yields was discussed.

以取代的氨基嘧啶为共试剂，与多种芳香族硝基化合物进行了硒催化的羰基化反应，产率最高可达90％左右。

Application of pyrites in coal gangue in treatment of wastewater containing Niwas studied.

在煤系硫铁矿在处理含镍废水中，废水的pH值，反应时间，粒度，加入量，温度，搅拌等对Ni2+的去除率影响较大。

By using a mixture of aromatic hydrocarbon and water as a binary solvent,reaction of pyrogallol with PhCCl 3 was carried out in the presence of a catalyst(ZnCl 2?AlCl 3 or SOCl 2).2,3,4-Trihydroxybenzophenone was obtained in yields of 80%-87% with the advantages of easy control,stable yield,high product quality and low cost.

以焦性没食子酸为起始原料，在惰性气体保护和催化剂(ZnCl2、AlCl3或SOCl2)的存在下，在芳香烃与水组成的二元混合溶剂中，与三氯甲苯反应，经过芳香烃溶剂的后处理，可以得到2，3，4-三羟基二苯酮，产率最高达87%。

Methods 56 patients in esophageal and gastric variceal bleeding were allocated randomly into the control group and the treatment group. All patients were given basic treatment, the CG patients received pituitrin (0.2U/min) though micro infusion pump,octreotide 0.1mg were injected in the TG patients and infused continuously at a rate of 25 礸/h. The efficient hemostasis, rebleeding, the average bleeding time and blood volume were recorded. Adverse reactions such as the queasiness, abdominal distension, abdominal pain, diarrhoea, palpitaition and hypertension were observed.

将经胃镜证实的食管胃底静脉曲张破裂出血患者56例随机分成对照组(n=28)和治疗组(n=28)，两组在给予基础治疗的同时，对照组使用垂体后叶素0.2U/min微泵持续静脉滴注；治疗组使用奥曲肽，首次0.1mg静注，再以25μg/h微泵持续静脉滴注止血治疗，比较两组在止血有效率、再出血率、平均止血时间、平均输血量等止血效果及恶心、腹胀、腹痛、腹泻、心悸、胸闷、血压升高等不良反应上的差异，并进行统计学分析。

In the course of the reduction of 2, 4-diamino-5-methyl-6-nitro quinazoline instead of using 〓 catalytic hydrogenation was used for improving the yield.

改进了原合成路线中的〓〓还原的方法，采用催化氢化的方法（催化剂为5％Pd/C），使反应的产率接近8O％。

In the course of the condensation of 2, 4, 6-triamino quinazoline with substituted benaldehyde, the solvent DMF was replaced by absolute ethanol and the dried 3A clathrates was used as the dehydrating agent in order to improve the yield.

在2，4，6-三氨基喹唑啉与取代苯甲醛的缩合过程中，用无水乙醇代替DMF作溶剂，并用干燥过的分子筛吸收反应过程中生成的水，从而简化了后处理的步骤，并提高了产率。

A key feature of this methodology is the use of metal catalysts for the in situ racemization of enzymatically unreactive enantiomers in the enzymatic resolution of racemic substrates.

酶和金属配合物的结合扩展了这个方法的使用范围，该方法的主要特征是用酶催化拆分和金属催化原位外消旋化未反应的底物，克服了经典动力学拆分最高产率只有50%的缺陷。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！