These results similar to those derivatives of compound H2, which showing phenolic hydroxyl of ring A was a key group.

And the pKa values for the phenoxyl and the water are 5.22 and 9.47 respectively.

配位酚羟基和水分子的离解常数pKa值分别为5.22和9.47。

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The-COOH contents in HA increases, phenolic-OH group decreases and the chemical acidity of acidic functional groups increases when HA is oxidized by nitric acid.

用硝酸氧化能使HA中羧基含量增加，酚羟基减少，酸性功能团活性提高。

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Sodium ferulate ( SF), extracted from DangGui, containing phenolic hydroxyl has the antioxidative activity.

阿魏酸钠（SF）是当归的水溶性单体提取成分，含有酚羟基，具有抗氧化活性。

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Determination of the Content of Phenolic Hydroxyl Groups in Lignin and Pulp with FC-Method

FC法测定木素和纸浆中的酚羟基

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Ten mononuclear complexes with phenolic hydroxyl Schiff base ligands have synthesized.

以酚羟基Schiff碱为配体设计合成了十个单核过渡金属配合物。

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Results indicated that contents of carboxyl, phenolic hydroxyl and sulfonic groups decreased with increased M_w.

研究表明，随着Mw增大，羧基、酚羟基、磺酸基的含量减小。

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Furthermore, the pH effect of photoionization of tyrosine resulting from deprotonation of phenolic hydroxyl group in alkaline solution was demonstrated.

进一步阐明，酪氨酸光电离的pH效应源于其酚羟基的电离。

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Their structures were characterized by elemental analysis, IR, NMR and TG DSC.

经元素分析、IR、NMR和TG－DSC测定，对其结构进行了表征，配合物是通过酚羟基氧原子和锡原子的配键生成的。

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These illustrated that selective inhibition of TOP ⅱα might originate from the middle of the phenolic hydroxyl groups on the B ring.

这些说明选择性抑制TOPⅡα的活性可能来源于中间B环上的酚羟基。

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NMR study of proton dissociation processes of two complexans containing phenolic hydroxyl groups

含酚羟基氨羧络合剂质子解离过程的NMR研究

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Expanded empirical formulas suggest that, in structure unit of C9, the numbers of phenol and aliphatic hydroxyl both have increased, while the carboxyl and carbonyl have decreased after hydrogenation.

扩大经典式显示，C9结构单元中酚羟基和醇羟基的个数在活化后都有所增加，羰基和羧基数都不同程度地减少了。

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The C_9 unit empirical formula of the product of F was: C_9H_ ( 6.72) O_ ( 3.07)( OCH_3) 1.52, with 0.43 Ph-OH and 1.52 methoxyl group in each C_9 unit.

甲酸酸解后产物的C9单元经验式为：C9H（6.72）O（3.07）（OCH3）（1.52），每个C9单元含有0.43个酚羟基，1.52个甲氧基；

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The technology could effectively get rid of sediment-causing substance in fruit juice or wine, such as pectin, protein.

能有效去除果汁饮料（酒）中的果胶、蛋白和高级棕榈酸酯絮状物等造成沉淀的物质。

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Liquor turbidity and precipitate include white haze, flocculent precipitate, white needle-shaped crystal, brown precipitate, faint yellow precipitate, blue precipitate and smoky haze etc.

白酒浑浊沉淀现象有白色浑浊、絮状物沉淀、白色针状结晶、棕色沉淀、淡黄色沉淀、蓝色沉淀、烟雾状浑浊等；

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, white floc ( induced by the change of dissolution conditions of ethyl oleate, ethyl palmitate, ethyl linoleate and fusel oil), brown yellow precipitate ( induced by iron ion), and greasy substances ( produced by aroma-producing substances in liquor).

白色絮状沉淀主要由3种高级脂肪酸乙酯，即油酸乙酯、棕榈酸乙酯、亚油酸乙酯和杂醇油的溶解条件变化而引起；棕黄色沉淀主要是由铁离子形成的棕色沉淀物质；

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The precipitate in liquor is a common problem in distilleries which have to tackle with and the frequent causations are as follows: floccule induced by three kinds of higher fatty acid ethyl ester and microthermal storage and filtration could prevent it;

白酒产生混浊沉淀是一普遍问题，常见的有絮状沉淀，主要由3种高级脂肪酸乙酯引起，可于低温贮存过滤；

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The magnetic field separation method can separate the magnetic flocs effectively, which overcome the high gradient magnetic separator to the electric power supply dependence, achieves the good treatment effect.

磁场分离法能有效分离磁性絮状沉淀，克服了高梯度磁分离器对电力供应的依赖，达到较好的处理效果。

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CONCLUSION The method of new technics was simple and practical, which well solved the problem of the floccule appearing in Compound Belladonna Mixture.

结论新工艺制法简单、实用，有效的解决了复方颠茄合剂絮状沉淀的问题。

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The precipitate in low-alcohol Maotai Liquor mainly include reversible white floc, black fine solids precipitation, and gray floc.

低度茅台酒生产中产生的主要沉淀为：可逆性的白色絮状沉淀、黑色细颗粒沉淀和灰白色絮状沉淀。

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The solution of zirconium oxychloride is hydrolyzed by aqueous ammonia, and hydrated zirconia flocculent is deposited.

氧氯化锆水溶液用氨水水解，生成水合氧化锆絮状沉淀，再经过洗涤、陈化、干燥、破碎、筛分、活化处理等几步工艺制成水合氧化锆树脂。

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