英汉例句

• and hydroxyl groups of acetylneuraminic acid were protected by acetylation, then protecting groups were take off selectively to make chlorine take the place of 2-acetyl.

  唾液酸经全乙酰化保护羟基后，选择性的脱去保护基，使它的2位的乙酰基被氯取代。

• the ftir result verified that the hydroxyl groups on the surface of the resulting nano-sio2 form hydrogen bondings with adipic acid generated by hydrolysis of dimethyl adipate during reaction.

  红外光谱表明二氧化硅表面硅羟基与己二酸二甲酯酯化产物己二酸的羧基形成氢键。

• the oxygen atoms that coordinated with yttrium were offered by both carboxyl and hydroxyl groups of deoxycholic acid.

  脱氧胆酸中羧基氧原子、羟基氧原子均与钇发生配位作用。

• a biologically important organic phenol, having two hydroxyl groups attached to the benzene ring.

  苯磷二酚生物学上一种重要的有机酚，苯环上有两个羟基群。 收藏。

• 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。

• the phenylated silica gel has been prepared by the reaction between the surface hydroxyl groups of silica gel and phenyl trichlorosilane.

  本文利用苯基三氯硅烷和硅胶表面羟基反应制备了苯基化硅胶。

• both the free hydroxyl groups readily undergo esterification.

  两个自由羟基，都容易酯化。

• it was found that the two hydroxyl groups on c9,10 of aleuritic acid were in cross position. the molecular structure of shellolic acid was confirmed by modern spectrometry.

  发现国产紫胶中，紫胶桐酸c_（9、10）上的二个羟基处于交叉位，用现代光谱学手段证实了前人用化学方法推测的壳脑酸分子结构。

• the results indicated that the range of optimization amounts of hydroxysilicone oil which condensed with hydroxyl groups onto the surface of gas-phase foam silica.

  结果表明，在硅橡胶混炼过程中，接到硅橡胶主链上的羟基硅油甚少，大部分接到白炭黑表面上；

• the results showed that hydroxyl groups of h3bo3 reacted with the hydroxyl groups of fir powder, and thus the crystalline phase of cellulose was destroyed.

  研究表明，h3bo3与杉木粉中的羟基发生了缩合反应，纤维素的结晶被破坏；

• addition of the compounds with hydroxyl groups and a tendency of coordination will accelerate the degradation.

  添加有配位倾向的含羟基的化合物会加快破胶过程。

• when hydroxyl groups in ver were not metered, the elastomers presented two glass-transition temperatures.

  不计量ver中的仲羟基时，所合成的pu/ver表现为两个玻璃化转变温度。

• the foam was prepared through a reaction of the hydroxyl groups with diisocyanate.

  聚胺酯泡沫通过多羟基化合物上的羟基和二异氰酸酯反应形成。

• it was supposed that sodium phytate first reacted with amylopectin and hydroxyl groups of primary alcohol of c6 in starch molecular.

  推测支淀粉最先起反应，淀粉的c_6的伯醇羟基易于与植酸钠反应。

• hydroxyl groups on the filter medium are substituted to other functional groups.

  将过滤介质上的羟基取代为其它官能团。

• 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.

  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 made of organic diisocyanate or polyisocyanate with two hydroxyl groups or polyhydroxy compounds together with.

  它是由有机二异氰酸酯或多异氰酸酯与二羟基或多羟基化合物加聚而成。

• the hydroxyl groups of epoxy acrylate(aaep) in ver were sealed with different methods in order to obtain modified ver.

  采用不同的方法对乙烯基酯树脂（ver）中环氧丙烯酸酯（aaep）进行羟基封闭，制备改性ver。

• acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride, methacryloyl anhydride and methacrylic acid as the acylating agents.

  以甲基丙烯酰氯、基丙烯酸酐和甲基丙烯酸作酰化剂，研究了胆酸甲酯分子中羟基的反应活性。

• methods the hydroxyl groups were selectively acetylated and n atom was methylated respectively to prepare the derivatives of anisodamine.

  方法通过将山莨菪堿的羟基选择性地乙酰化，氮原子甲基化，制备山莨菪堿衍生物；

• 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。