羟基

A new series of the ligands of liquid crystal polymers with T-shaped two-dimensionl mesogens was synthesied by solution condensation polymerization by using 4,4'-(α,ω-alkylenedioyloxy)-dibenzol dichlorids with 2,4-dihydroxy-4 '-alkoxyl azobenzene as the monomers.

摘 要 以4，4′-二苯甲氯和2，4-二羟基-4′-烷氧基偶氮苯为单体，通过溶液聚合，合成了一系列新的含T-型二维液晶基元的液晶高分子配体。

A new series of the ligands of liquid crystal polymers with T-shaped two-dimensionl mesogens was synthesied by solution condensation polymerization by using 4,4'-(,-alkylenedioyloxy)-dibenzol dichlorids with 2,4-dihydroxy-4'-alkoxyl azobenzene as the monomers.

以4，4′-二苯甲酰氯和2，4-二羟基-4′-烷氧基偶氮苯为单体，通过溶液聚合，合成了一系列新的含T-型二维液晶基元的液晶高分子配体。

Four soluble poly(p-phenylene vinylene) derivatives with asymmetric alkoxyl substituents, poly (2-methoxy-5-butoxy)-p-phenylene vinylene, poly [2-methoxy-5-(3'-methyl)butoxy]-p-phenylene vinylene, poly (2-methoxy-5-hexyloxy)-p-phenylene vinylene and poly (2-methoxy-5-octoxy)-p-phenylene vinylene, were prepared by dehydrochlorination reaction with using p-hydroxyanisole and alkyl bromide as raw materials.

以对羟基苯甲醚和溴代烷烃为原料，采用强碱诱导的脱氯化氢缩合聚合法合成了四种可溶性不对称烷氧基取代聚对苯乙炔衍生物，分别为聚（2-甲氧基－5-丁氧基）对苯乙炔、聚［2-甲氧基－5-（3'-甲基）丁氧基］对苯乙炔、聚（2-甲氧基－5-己氧基）对苯乙炔和聚（2-甲氧基－5-辛氧基）对苯乙炔。

ABSTRACT The thesis aims at the studies on the total synthesis of α-alkylidene -β-hydroxy-γ-butyrolactones.

本论文以α-亚烷基-β-羟基-γ-丁内酯类天然产物的全合成研究为主，包括三个部分：第一部分：文献综述：着重介绍了α-亚甲基-γ-丁内酯萜类，。。。

The terminal allylation reaction was studied which was influenced by reaction time, reaction temperature, category and dosage of allylation reagent and molecular weight of polyether.

其次对双羟基聚醚的端烯丙基化反应进行研究，讨论了反应时间、反应温度、聚醚分子量、烯丙基化试剂的种类和用量对反应的影响。

The content of five free-anthraquinones (aloemodin, rhein, emodin, chrysophanol, physcion) in Alc95% active part were simultaneously determined by HPLC method.

其中7，3'-二羟基-5'-甲氧基异黄酮是自然界中罕见的B环为间位二取代的异黄酮类化合物，为新化合物。

The results demonstrated that recombination was not only physical mixed, but also connected by hydrogen bond between silicic polymer and free or hydrolyze-polymerized aluminum ion and polysilic acid which could form aluminiferous during the process.

结果表明，复合过程不是简单的物理混合，部分铝离子及水解络合铝离子可与共存的聚硅酸通过羟基结合，发生络合反应生成铝硅聚合物。

Results The average thickness of MAO film was 32.7μm and the films presented alveolate pores with diameter from several micrometers to a hundred micrometers, under SEM.

结果纯钛表面微弧氧化膜的平均厚度为32.7μm，表面存在大量直径3-20μm的蜂窝状孔隙，纯钛微弧氧化膜中富含钙、磷成分，并且出现羟基磷灰石结晶。

Objective To study the ameliorative effects of madecassosideon dementia induced by longterm intake of aluminum in mice.

目的 研究羟基积雪草甙（madecassoside，MC）对慢性铝中毒痴呆小鼠的保护作用。

The results indicated that the Fe3+ ion of Fe-AO-PAN was coordinated with three amino nitrogen atoms and three hydroxyl oxygen atoms of three amidoxime units on the surface of AO-PAN by covalent bond, and the coordination number was six.

结果表明， Fe-AO-PAN中的Fe3+能够与AO-PAN表面三个偕胺肟链节单元的三个氨基氮原子和三个羟基氧原子进行配位反应，配位数为6。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。