酚羟基化合物往往具有清除O-·2 作用。
The phenolic hydroxyl compounds usually have activity scavenging O -· 2.
含酚羟基化合物的抗氧化活性与其结构密切相关。
The AA of phenolic compounds is correlated to their chemical structures.
所有的K离子均同时与酚羟基和硝基的氧原子配位。
All K atoms coordinate with o atoms of phenolic hydroxyl group and nitro-group simultaneously.
目的改进雌激素类化合物3位酚羟基的甲醚化工艺。
OBJECTIVE To improve the preparation of estrogen 3-methyl ether.
红外分析表明大同煤中羧基含量很少，酚羟基含量较多。
We also found that Datong coal contains more phenolic hydroxyl and less carboxyl.
同时测定了炭黑表面羧基、酚羟基、内酯基等酸性含氧基团的含量。
The contents of carboxyl, phenol hydroxyl, and lactones groups on carbon black surface have been determined.
腐植酸的羧基和可滴定的酚羟基在热力学性质上同简单的羟基苯羧酸相似。
The thermodynamic parameters of carboxylic group and titrable phenolic hydroxyl group of humic acid are similar to that of simple hydroxy-benzoic 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。
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.
反应的结果是氯取了荧光素的酚羟基，反应机理由本工作找到的关键中间体证实。
Whole effect of the reaction is that the substitution of chlorine for phenolic hydroxy on fluorescein. The reaction mechanism is certificated by the key intermediate found in the work.
而羧基邻位有酚羟基存在时，则配体以双齿形式与钛配位形成二茂钛六元环状化合物。
And if there is a hydroxyl in ortho position of carboxyl, the oxygen of hydroxyl and carboxyl in ligand are bound to ti to form hexatomic cyclic compound.
研究表明，由于具有多酚羟基结构，茶多酚复合体及其单体儿茶素可以有效消除自由基。
Research have shown that the structure of phenolic hydroxyl can effectively dispelling the free radical.
对铁基复合氧化物催化苯酚羟基化合成苯二酚反应过程中酚焦油的生成机理进行了研究。
The mechanism for the formation of phenolic tars in the process for the preparation of diphenols by the hydroxylation of phenol using iron-based composite oxides as catalyst was studied.
对铁基复合氧化物催化苯酚羟基化合成苯二酚反应过程酚焦油的生成反应进行了模拟研究。
The simulating study of the formation and inhibition of phenolic tars in the process of diphenols preparation by hydroxylation of phenol with iron-based composite oxides as catalyst was conducted.
经活化处理后纸浆中木素含量降低，残余木素中的羰基和酚羟基增多，聚糖中的羰基也增多。
Lignin content in the pulp descreases, while carbonyl and phenolic hydroxylgroups in the residual lignin increase, and so do carbonyl groups in polysaccharides, after theactivating treatment.
配体中酚羟基上的H原子与N原子相吸形成了分子内氢键，并以氢键连接构成了一个新六元环。
H atom of phenolic hydroxyl in the ligand was attractive to N atom forming intramolecular hydrogen bond, and a new six-membered ring was formed by the hydrogen bond connection.
与环己烯法相比，氢气还原法的催化剂用量明显减少，醇羟基数增加较为显著，酚羟基含量基本一致。
Compared with the reaction using cyclohexene as reducer, the dosage of catalyst was obviously reduced, alcoholic hydroxyl increased and the content of phenolic hydroxyl was almost the same.
在理化性质测定方面，将葛根素分子结构中的4’-酚羟基进行酰化后其理化性质发生了一定的变化。
When we acylated the 4'-phenolic hydroxyl group in the molecular structure of puerarin, the derivatives'physico-chemical properties had some changes.
着重介绍用过氧化氢和过氧化羧酸作羟基化剂，使苯酚羟基化生成邻苯二酚和对苯二酚的研究开发进展。
Research and development for fhe production of pyrocatechol and hydroquinone by reaction of phenol with hydrogen peroxide and percarboxylic acid as hydroxylating reagent are introduced.
迷迭香酸是一种含多酚羟基的酸，广泛存在于多种植物中，具有抗菌、抗病毒、抗氧化、抗炎等多种药理作用。
Rosmarinic acid with several phenolic hydroxyl groups exists widely in many plants, which has various pharmacological actions on anti-inflammatory, anti-biotic, anti-virus, and anti-oxidation.
通过比较木素磺酸盐和模型物接枝前后酚羟基的含量和碱性硝基苯氧化产物得率的变化，对接枝反应位置进行了研究。
The graft site was studied by comparing the phenolic contents, yields of alkaline nitrobenzene oxidation products of lignosulfonates, model compounds and their copolymers.
本文观察到酚酸类化合物分子中的酚羟基对土壤中氮硝化有关的微生物及酶具有毒性作用，是抑制土壤中氮硝化作用的主要影响基团。
It is observed that phenolic group in phenolic acids appeared toxic to microbials and enzymes, and was main group to effect inhibition of nitrification.
用天然氨基酸为起始材料，合成了一种具有双酚羟基官能团的环肽，并以此环肽为联酚合成了主链包含酰胺键的可生物降解环氧树脂。
Starting from natural amino acid, diphenol having a phenolic hydroxyl group was synthesized. Using the diphenole as comonomer, a biodegradable epoxy resin in which contain amide group.
采用酶动力学方法研究了对羟基肉桂酸对酪氨酸酶单酚酶的抑制效应。
The inhibitory effects of 4-hydroxycinnamic acid on the activity of monophenol oxidase in tyrosinase were studied using enzymological kinetic method.
研究表明，棓酰类多元酚可与铝形成络合物，其络合物是铝和棓酰基中苯三酚的邻位二羟基形成的，它是稳定的五员螯合环结构；
It is show that the complexes of galloyl type hydrolysable tannins with aluminum are formed which involve five-member ring stably formed adjacent hydroxyl groups in galloyl to aluminum atoms.
在选定的色谱操作条件下，2-（4-羟基苯氧基）丙酸与杂质对苯二酚等之间具有良好的分高效果。
Under the selected conditions of the chromatographic operation, there was the better separation efficiency between 2-(4- hydroxyphenoxy) propionic acid and impurities(such as hydroquinone, etc).
总酚提 取物主要包括对羟基苯乙醇、3、4-二羟基苯乙醇、红景天苷以及以 其为母核的糖苷类化合物和其它衍生物。
The total phenol extract mainly contains hydroxyl mandelic, 3, 4-dihydroxy phenylethyl alcohol, salidroside and indicant compound and other derivatives with salidroside as the mother nucleus.
用8羟基喹啉、甲醛、间苯二酚及苯磺酸钠作原料合成了一种螯合树脂。
Formaldehyde 8 hydroxyquinoline sodium benzene sulfonate resorcinol copolymer described as chelating ion exchange resin was synthesized.
由对羟基苯甲醛经过硝化、腈化和碘化反应也合成了硝碘酚腈。
Nitroxynil was also prepared from p -hydroxybenzaldehyde by nitration , cyanation and iodination of the product.
由对羟基苯甲醛经过硝化、腈化和碘化反应也合成了硝碘酚腈。
Nitroxynil was also prepared from p -hydroxybenzaldehyde by nitration , cyanation and iodination of the product.
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