The smaller molecular weight of humic acids is, the more oxygen groups such as carboxyl and phenolic hydroxyl it contains, the more reaction between the low molecular weight and humic acid, the greater absorption of humic acid.

IR absorption spectra indicated that the relative percentage contents of phenolic hydroxyl in LTPs were reduced to 68 4%-80 7% compared with that of TP ( 104%).

红外吸收光谱表明，LTP分子中仍存在酚羟基，但酚羟基的相对含量由TP的104%减少到684%～807%。

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PVPP has good appetency, It can remove the polyphenol efficiency through absorbing on surface by combination between the hydroxyl and carbonyl?

PVPP通过酚羟基和羰基之间的氢键结合，进行表面吸附，有效地去除多酚。

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The results show that hesperidin can not scavenge hydroxyl radicals ( HO ·) effectively because it contains only two phenol hydroxyls. However, it can form a complex of 2:1 with Cu(ⅱ) through the carbonyl group and the ortho-hydroxyl group.

结果表明，橙皮苷酚羟基含量少，不能有效清除羟基自由基，但是可通过羰基和邻羟基与Cu（II）形成2：1配合物；

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Nitrophenyl ferulate was synthesized in one step without the protection of the hydroxyl of ferulic acid in the presence of1,3 dicyclohexylcarbodiimide ( DCC) as the catalyst.

本文采用在1，3二环己基碳化二亚胺（DCC）催化下，无需保护酚羟基，阿魏酸和对硝基苯酚一步反应法直接合成了阿魏酸对硝基苯酚酯。

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The results showed that the coordination bonds were formed between Y(ⅲ) ions and phenolic hydroxyl group of PUF.

结果表明，三异丙氧钇中Y（Ⅲ）与PUF中酚羟基上的氧形成了配位键；

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Studies on C-Glycosides& ⅴ. Protection and Deprotection of Phenolic Hydroxy Group in the Synthesis of Substituted Phenols by Grignard Reagents

碳苷研究&Ⅴ.用Grignard试剂合成取代苯酚中酚羟基的保护及脱保护

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Determination for contents of the sulphoacid groups and hydroxy groups in urea modified sulphonating phenolic resin by Conductometric Titration

电导滴定法测定SPU中磺酸基、酚羟基含量

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Content of the active groups as carboxyl and hydroxyl etc. in AFA is somewhat higher than one of lower rank coals FA, but similar to one of soil FA.

羧基、酚羟基等活性官能团含量略高于风化煤和泥炭FA，接近于土壤FA。

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Conclusion The phenol-ketone structure in the CD ring may be responsible for the tetracycline ′ s bone affinity. The conformation that the structure keeps almost in one plane is necessary for its bone affinity.

结论四环素CD环中酚羟基酮结构可能是该类化合物趋骨活性的贡献部分，它们保持在一个平面内的构象是其具有较高趋骨性的必备条件。

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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.

对杨木APMP浆残余木质素进行了~1H NMR测定，结果表明，残余木质素结构中含有大量的对酚羟基基团和α羰基等结构。

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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。

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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

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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。

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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。

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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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