查询词典 refluxing

The distribution and the refluxing pattern of the venules in the pulmonary parenchyma on yak and sheep were described in the present study, and these contents provided the new data for the comparative anatomy.

本文报道了牦牛和绵羊肺脏实质内微静脉的系统的分支分布状况及回流方式，为比较解剖学增加了新资料。

The experimental results show that the optimum conditions were as follows: molar ratio of pentaerythritol to phosphorus trichloride to bisphenol A was 1.0:2.8:2.0, the first and the second reaction held for about 3 h on the conditions of refluxing.

试验结果表明：反应溶剂为苯，用量为50 mL；物料配比〔m：m：m〕为1.0：2.8：2.0；第一步和第二步均回流反应3h。

The method comprises: adding 4-(3,4-dichlorophenyl)-1-tetralone and solvent at a ratio of 1:(3-4) into a three-necked flask with a stirrer, heating under stirring until 4-(3,4-dichlorophenyl)-1-tetralone is completely dissolved, heating to 60-100 deg.C, refluxing for 0.5-2 h, cooling the filtrate to -5-10 deg.C, filtering, recrystallizing to obtain refined 4-(3,4-dichlorophenyl)-1-tetralone, and drying at 40-80 deg.C to obtain dry 4-(3,4-dichlorophenyl)-1-tetralone.

该方法的步骤是：在带搅拌的三颈瓶中依次加入4-(3，4-二氯苯基)-1-萘满酮和溶剂，溶剂与4-(3，4-二氯苯基)-1-萘满酮的L∶W为3～4∶1，将上述4-(3，4-二氯苯基)-1-萘满酮及混合精制溶剂搅拌下升温，使4-(3，4-二氯苯基)-1-萘满酮全部溶解，升温至60～100℃，回流0.5-2h；滤液用冰水冷却至-5～10℃，过滤，所得物料再用上述方法进行一次重结晶得到精品4-(3，4-二氯苯基)-1-萘满酮，40～80℃干燥后即得到干品4-(3，4-二氯苯基)-1-萘满酮。

An exothermic reaction occured with separation of water; start refluxing with a Dean-Stark trap attached to the reflux condenser to collect the water that is generated in the reaction.

放热反应发生的同时有水生成；用一个dean-stark trap接在回流冷凝管上用于收集反应中生成的水。

An improved Adler method was used for preparing TAPPH〓. TAPPH〓 was synthesized in high yield by direct condensation of pyrrole with 4aminobenzaldehyde in refluxing propanoic acid with the presence of vitamin C. This new synthetic strategy for preparing TAPPH〓 can greatly extend synthetic methods for porphyrins containing amino groups.

我们通过对Adler法的合成条件进行改进，即在反应体系中加入还原剂Vc，由4-氨基苯甲醛直接合成了对酸敏感的TAPPH〓（1），提高了总收率，拓宽了Adler法的适用范围。

The optimization reaction condition is that using the mixture catalyst of phosphorous acid ester and dihydrogen phosphate, and toluene as solvent, at 105 oC and refluxing 30 hours, the yield is 90% with purity over 95%.

在最佳条件下，即在混合催化剂亚磷酸酯/磷酸氢盐的作用下，以甲苯为溶剂，在105 ℃反应30 h，酯化收率90%，纯度95%以上。

This allows part of the refluxing liquid to be tapped off at various points as "side-stream" products.

这允许一部分的循环加热的液体被轻拍在各种各样的点作为&边小河&产品。

NaOH concentration and refluxing time have been found to effect the phase, particle size and morphology.Ⅱ.

氢氧化钠浓度和回流时间会影响产物的相、颗粒和形态。Ⅱ。

An optimal yield of 72% was achieved when the reaction was carried out in refluxing.

冰乙酸既是反应溶剂，又是催化剂，产率最高可达72%。

The best extraction technology was as follows: refluxing extraction with 16 times of 80 % alcohol for 2 times (1 hour each time).

最佳工艺条件为：16倍于原料的80 %乙醇，回流提取2次，每次1 h。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。