查询词典 phenol-phthalein

Clean synthesis of diphenyl carbonate by transesterification of phenol and dimethyl carbonate has been studied.

针对苯酚与碳酸二甲酯酯交换法合成碳酸二苯酯洁净催化反应过程进行了较系统的研究。

Reaction thermodynamics of diphenyl carbonate synthesis by the transesterification reaction from dimethyl carbonate and phenol is introduced.

介绍了碳酸二甲酯与苯酚酯交换合成碳酸二苯酯的反应热力学。

Their behaviors on the synthesis of diphenyl carbonate from phenol and CO2 in CCl4 were examined.

以二氧化碳、苯酚和碳酸钾为原料，在四氯化碳溶液中反应合成碳酸二苯酯时，锌负载催化剂具有较高的催化活性和DPC选择性。

The qualitative analysis by gas chromatography-mass spectrometry showed there were minor phenol and diphenyl carbonate in the MPC sample.

采用气相色谱-质谱法对所制备的MPC样品进行定性分析，结果表明其中还含有少量的苯酚和DPC杂质。

The synthesis of diphenylamine from aniline-phenol by liquid phase condensation in the presence of Pd/C catalyst was studied.

研究了在Pd／C催化剂存在下，通过液／固催化缩合反应由苯胺和苯酚合成二苯胺的方法。

The rise of temperature was favorable for disassociation of phenol hydroxyl but unfavorable for the formation of complex.

升高温度有利于酚羟基的解离但不利于单宁－金属络合物的形成。

It is very difficult to eliminate these influence factors completely by conventional treatment. Surface properties and surface treatment of ultrafine red phosphorus and MMT and their interface properties with polymer matrices were studied in this thesis. The results were characterized by GC, FTIR, XRD, DTA, TG, XPS, UV, SEM, TEM and other physical and chemical methods. The main contents are as following: 1. The study of factors influencing ultrafine red phosphorus's invariability and phosphine liberation indicated red phosphorus undergone oxidation and dismutation reaction in air, and trace ion of iron, copper and nickel fastened water absorption and oxidation, in which the effect of copper ion was the most, while aluminium and zinc ion could slow down red phosphorus'oxidation, and silver ion had the best effect on red phosphorus moisture absorption. Inhibitors such as aluminium hydroxide, magnesium hydroxide, organic phenol and ferrous potassuim cyanide had a good effect on reducing red phosphorus moisture absorption and restraining phosphine liberation.

本文围绕纳微米材料的表面处理及其在高聚物基体中的应用这一主题，系统地研究了超细红磷和蒙脱土两种常见材料的表面特性、表面处理方法及其与高聚物基体的界面特性，通过气相色谱、红外光谱、X射线衍射、差热、热重、X射线光电子能谱仪、紫外光谱、扫描电镜、透射电镜等现代分析仪器以及其它物理、化学方法对实验结果进行了表征和分析，全文主要内容如下： 1、对影响超细红磷安定性的因素以及磷化氢的缓释研究表明：红磷在空气中发生缓慢氧化、歧化反应，微量的铜、铁、镍等金属离子增加了它的吸水和氧化速度，其中铜离子的作用最为明显，而铝、锌等离子减慢了红磷的氧化速度，银离子对减少红磷的吸湿性效果最好。

Determine the content of the moisture with the dry law of the atmosphere; With is it draw law draw fat , analyse the backbone fat first esterification with the gaseous phase chromatogram to ask for; Determine the content of starch by fastenning all law; Propose the alcohol and sink the law and draw many candies with water, and determine many content of candy more than the color law with the phenol - the sulphuric acid.

用常压干燥法测定水分含量；用索氏提取法提取脂肪，将脂肪甲酯化，用气相色谱分析主要成分；用旋光法测定淀粉含量；用水提醇沉法提取多糖，并用苯酚-硫酸比色法测定多糖含量。

Brandy quality could be evaluated through the measurement of pH value, total phenol, colority, catechin, aromatic aldehyde and aromatic acids, Cu content, flavoring compositions, Einstein shift in ultraviolet spectrum, and non-alcohol volatile substances content in Brandy.

可通过测定白兰地的pH、总酚、色调以及儿茶素；芳香醛及芳香酸类物质；紫外光谱的"红移"现象；白兰地中的铜；白兰地中的香气成分；非酒精挥发物总量来评价酒质量。

Experimental study on microwave assisted photocatalytic degradation of phenol and its derivatives in aqueous solution was carried out with modified domestic microwave oven and electrodeless discharge lamp.

利用改装的家用微波炉和自制的无电极灯试验了5种酚在水溶液中的微波辅助光催化降解效果。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。