There are large amounts of phenyl hydroxyl groups and a-carbonyl available in the residual lignin of poplar APMP pulps by using' H-NMR spectra analysis.

The carboxylic groups in hemicellulose and the phenolic hydroxyl and ester groups in lignin are the major bonding sites for copper, as confirmed by FTIR.

另外，经FTIR证实，铜与木材作用时，主要是半纤维素中的羧基团和木质素中的酚羟基及芳基酯基与铜成键。

互联网摘选

Synthesis and Anion Recognition Properties of Receptors Bearing Phenolic Hydroxy Groups; Study on the Synthesis and Properties of Gemini Cationic Surfactant

含酚羟基化合物的设计合成及阴离子识别研究羟丙基Gemini阳离子表面活性剂的合成与性能研究

互联网摘选

The number of Phenol hydroxyl more in molecules, the activity of scavenge DPPH radical is stronger.

分子中酚羟基的数目越多，化合物清除DPPH自由基的活性就越强。

互联网摘选

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

这与化合物H2衍生物的活性结果相似，这些同样说明A环的邻二酚羟基是活性关键基团。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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。

互联网摘选

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

互联网摘选

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。

互联网摘选

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；

互联网摘选

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。

互联网摘选

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；

互联网摘选

, 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；

互联网摘选

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；

互联网摘选