英汉例句

• antioxidant activity was positive correlated to the number of phenolic hydroxyl groups and the stability of newly formed free radical.

  抗氧化活性大小与抗氧化剂分子中酚羟基数目及新生成自由基的稳定性呈正相关。

• 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.

  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。

• research have shown that the structure of phenolic hydroxyl can effectively dispelling the free radical.

  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。

• 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.

  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着，酚羟基含量基本一致。

• 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.

  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。

• the thermodynamic parameters of carboxylic group and titrable phenolic hydroxyl group of humic acid are similar to that of simple hydroxy-benzoic acid.

  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。

• in addition, compared with acidic lignin from stalk, aliphatic hydroxyl content of the lignin from pith was higher, phenolic hydroxyl and methoxy content were lower;

  另外，与秆部木素相比，髓芯木素中醇羟基含量较高，酚羟基和甲氧基含量较低。

• the reactivity of phenolic hydroxyl which in ring a and b of forsythiaside was almost identical.

  连翘酯苷结构中的a环酚羟基和b环酚羟基对活性氧的清除能力相当。

• in the alkylation, phenolic hydroxyl formed salt with sodium hydride, then reacted with 3bromo pentane, and the yield was 44.4 %;

  烷基化反应中先使酚羟基与氢化钠成盐，然后再与3溴戊烷反应，收率44.4%；

• the phenolic hydroxyl compounds usually have activity scavenging o -· 2.

  酚羟基化合物往往具有清除o-·2作用。

• three isoflavone compounds are synthesized with hydroxybenzene and phenylacetic acid in the improved method and three isoflavone derivatives are synthesized by modifying phenolic hydroxyl in a-ring.

  并以芳基酚和苯乙酸为原料，用「一锅煮」法合成了三个a环带酚羟基异黄酮化合物。 然后对其a环的酚羟基进行结构修饰，分别得到三个新的异黄酮衍生物。

• all k atoms coordinate with o atoms of phenolic hydroxyl group and nitro-group simultaneously.

  所有的k离子均同时与酚羟基和硝基的氧原子配位。

• 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.

  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。

• conclusion phenolic hydroxyl group is necessary for chalcone antioxidant; hydroxyl and double bonds of the opened c ring can increase antioxidant activity.

  结论酚羟基是起抗氧化作用的必要基团，c环开环后形成的羟基和双键是其抗氧化活性显着增强的重要原因。

• we also found that datong coal contains more phenolic hydroxyl and less carboxyl.

  红外分析表明大同煤中羧基含量很少，酚羟基含量较多。