查询词典 methanol

Optimum purification condition is elute with 60% methanol with a flow rate of 0.5ml/min .

采用SOURCE 5RPC预装柱检测收集到的洗脱液白藜芦醇纯度可达80.34％。

Under ultrasonic extraction, comparing the ratio of total alkaloid with 95% ethanal, hloroform, methanol.

用超声波提取法比较了以95%乙醇、氯仿、甲醇为溶剂的提取率，结果依次为1.21%、1.57%、1.54%。

Natural gas is important chemical material and is used as feed to produce synthesis ammonia,methanol and ethyne .

天然气是化工的重要原料，以天然气为原料生产合成氨、甲醇、乙炔三大产品。

The step and roughened surface promotes simultaneously the methanol oxidation via adsorbed CO and dissolved intermediates, therefore for different pure Pt electrodes, though different faradaic current, the current efficiency for CO〓 formation is approximately same.

台阶位置和粗化表面同时促进了甲醇氧化的两个路径，因此，对于不同的纯Pt电极，尽管甲醇氧化电流不同，CO〓的电流效率接近相同。

Due to the flammability of methanol vapor and air and its concentration in a certain range of the explosive mixture, so, how safe and effective storage and use is very important.

由于甲醇的易燃性及其蒸气与空气在一定浓度区间内混合物的爆炸性，因此，如何安全、有效地储存和使用是非常重要的。

Then Br was mixed with silver fluoborate(AgBF4) in methanol and replacement reaction took place.

进而利用Br与AgBF4 在甲醇中发生复分解反应，合成出了四氟硼酸N-乙基吡啶(BF4)。

In this paper, catalysts for hydrogenation of carbon dioxide to hydrocarbon, methanol and formic acid were introduced.

介绍了近年来二氧化碳催化加氢合成烃类、甲醇和甲酸过程使用的催化剂和助剂研究进展。

Removal rate and feed oil recovery were obviously increased with the mixed solvents of methanol and formic acid.

甲醇与甲酸组成的复合溶剂可明显提高碱氮的脱除率和柴油收率，同时减少了络合剂的用量。

In addition, the methanol contained in aspartame breaks down into formic acid and formaldehyde.

此外，甲醇所载阿斯巴甜破裂成甲酸和甲醛。

A phospho molybdic acid catalyst was investigated for the esterification of fumaric acid with methanol in this paper.

研究了以磷钼酸为催化剂，富马酸和甲醇为原料合成富马酸二甲酯，探讨了酸醇量比、反应时间、催化剂用量等工艺参数对 DMF收率的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。