查询词典 pyrocatechol

The production, demand, import and export of pyrocatechol in China were analyzed, and the future production and consumption of catechol were predicted.

综合分析了国内邻苯二酚供需、生产和进出口等状况，对今后生产与消费趋势进行了预测。

The synthesis of 1,2-dimethoxybenzene from chloromethane combined with pyrocatechol is introduced in this artcile.

本文介绍了以氯甲烷和邻苯二酚为原料合成1，2-二甲氧基苯的方法。

The change of Ortho chlorophenol and pyrocatechol, which were used as models of chlorophenol compounds and polyphenol compounds respectively during the electroanalysis process was also investigated in order to find degradation mechanism.

实验中以邻苯二酚和邻氯苯酚作为多酚类化合物、木素衍生物和氯酚类化合物的模型物，探讨了多酚类化合物和氯代酚在电化学处理过程中的降解机理。

Pyrocatechol and hydroquinone, as important raw material intermediates in fine chemical industries, are used in many fields.

邻、对苯二酚是重要的精细化工原料中间体，用途非常广泛，市场的需求量很大。

The color fading reaction of pyrocatechol violet with iodate ion in stronger acid was studied and a method for determination of iodine in the salt was proposed.

研究了在强酸性条件下，邻苯二酚紫与碘酸根离子的褪色反应，拟定了测定加碘食盐中碘离子简便、快速的分析方法，确定了该褪色反应的最佳褪色条件。

The production and consumption situation of pyrocatechol were analysed in country and abroad.

分析了国内外邻苯二酚生产和消费状况。

Tert-butyl- pyrocatechol is one of important organic substance.

对国内外对叔丁基邻苯二酚的合成工艺及其最新的研究进展进行了介绍。

It has been observed that pyrocatechol and m-phenylenediamin can sensitively inhibit the discoloration of neutral red oxidation by the H2O2 and in the presence of catalyzer Fe in dilute sulfuric acid solution but the inhibitory effects of two organic compounds can not be added. Based on this research, the advantages of artificial neural network were adopted to handle the experimental data and a new inhibitory kinetic spectrophotometry of simultaneous determination for pyrocatechol and m-phenylenediamin with artificial neural networks was established.

在硫酸性介质中，Fe能够催化H2O2氧化中性红褪色反应，邻苯二酚和间苯二胺都能阻抑该催化氧化褪色反应的速度，研究发现：两者对Fe催化H2O2氧化中性红褪色反应阻抑作用不具有加和性，根据这一现象，用人工神经网络处理非线性体系的优势进行数据处理，从而建立了一种新的测定邻苯二酚和间苯二胺混合物的人工神经网络阻抑动力学光度法。

Catalysts in three synthesis routes,the hydroxylation of 4-tert-butyl-phenol,the alkylation of pyrocatechol by tert-butyl alcohol and the alkylation of pyrocatechol by isobutene,were discussed in detail in terms of reaction conditions,catalysts,temperature,reaction time etc.

论述了对叔丁基苯酚羟基化法、邻苯二酚与叔丁醇烷基化法和邻苯二酚与异丁烯烷基化法生产对叔丁基邻苯二酚的合成路线的催化剂。

Flavone and pyrocatechol were chosento act as model compounds of different structure aspects of flavonoids and theirreactions with α-hydroxyl ethyl peroxyl radical were studied. The rate constants of thereactions of α-hydroxyl ethyl peroxyl radical with flavone and pyrocatechol weredetermined to be 〓 and 〓,respectively.

我们又选择了黄酮体和邻苯二酚作为黄酮类化合物的结构模型，用脉冲辐解的方法研究了它们与α-羟乙基过氧自由基的反应动力学，得到黄酮体和邻苯二酚与α-羟乙基过氧自由基的反应速率分别为〓和〓〓。

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。