羟基化

The hydrophobic core serves as a reservoir for water-insoluble drugs.Hence,these nanoparticles can be used as carriers for hydrophobic drugs.For the synthesis of cholesterol-modified glycol chitosan conjugates,a carboxyl group was initially introduced to cholesterol molecule using succinic anhydride,and then covalently coupled with the primary amino group of glycol chitosan in the presence of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxyl succinimide.

本文采用二步反应将胆固醇接枝到乙二醇壳聚糖，首先将胆固醇进行羧基化，将胆固醇与琥珀酸酐反应生成胆固醇半琥珀酸酯，然后用1-乙基-3-(3-二甲基氨丙基)碳二亚胺盐酸盐与N-羟基琥珀酰亚胺作为偶联剂，将胆固醇半琥珀酸酯的羧基与乙二醇壳聚糖主链的氨基进行反应，得到胆固醇疏水改性乙二醇壳聚糖共聚物。

The structure of the product was characterized by IR and 1H NMR.It indicated that the double bonds in ester were sulphonated and then converted into the corresponding saturated hydrocarbon ester sulphonate after hydrolysis.

对产物用红外光谱和核磁共振 1H谱进行的结构分析结果显示，油酯的不饱和双键发生了磺化反应，生成了饱和的羟基磺酸盐。

Tetra-(8-hydroxy-quinolinato) boron complex with tetrahedral-like geometry and 3,3',4,4'-benzophenone tetracarboxylic anion with long-chain structure were successfully intercalated into layered double hydroxides with ion-exchange method.

我们首次选择了两种具有不同构型的光活性物种作为客体，即：具有四面体构型的四-(8-羟基喹啉)硼配合物和具有长链形状的3，3′，4，4′-苯酮四羧酸，得到了两种新的有机无机杂化光功能材料。

A series of polys based on pyromellitic dianhydride, biphenylyl tetracarboxylic dianhydride, thiodiphthalic dianhydride bis benzene dianhydride and oxydiphthalic dianhydride were prepared in different solvents.

以所合成的AB_2单体为原料，合成了一系粘度较低、溶解性良好，带端酚羟基、苯甲酰基、乙酰基、氰代苯基和苯酰苯亚胺基的芳香族超支化聚酰亚胺，通过核磁波谱、红外光谱分析和元素分析对其结构进行确证。

The normal method was through the hydrolysis and poly-condensation process of tetravalent metal alkoxides and inside which rare earth dopants are simply performed by dissolving salts into initial sol, thus makes matrices being introduced a higher percent of hydroxyl groups, affects the resulting luminescence efficiency and balance of two phases.

普通的方法为将稀土盐导入金属烷氧基化合物的溶胶然后水解缩聚，这使得金属离子分离的最小化过程受限以及含羟基过多，极大影响了发射效率和两相均衡。

Influence of the chemicals on the composition of pyrolysis products of Tilia amurensis lignin was discussed. During the pyrolysis process, a great deal of CO2, CO and H2O was produced, which was mainly attributed to the elimination of carbonyl, carboxyl, hydroxyl, methyl and the further reaction to form polycyclic aromatic hydrocarbons.

结果表明：木质素在裂解过程中，产生大量的CO2、CO、H2O，其主要原因是高温时羰基、羧基、羟基、甲基等脱除反应以及环芳香族化反应深入进行，而所选用的阻燃剂大多数促进了CO2、CO、H2O的产生。

Pentanediol reacted with phosphorus tribromide to make it mono-bromination, under the catalytic action of PPTs it reacted with 2,3-dihydropyran to protect another hydroxy group, then to react with triphosphine, produced quarterphossal.

再以1，5-戊二醇为原料，三溴化磷使之单溴代，得到5-溴-1-戊醇，在对甲苯磺酸吡啶盐的催化下与2，3-二氢吡喃反应保护其另一端的羟基，与三苯基膦反应生成季磷盐。

Using classical diazotisation of anilines, 5-(4-aminophenyl)-10,15,20-triphenyl-porphyrin was converted to a series of meso-tetraarylporphyrins with different substituents, including 5-(4-hydroxylphenyl)-10,15,20-triphenylporphyrin (80%), 5-(4-chlorophenyl)-10,15,20-triphenylporphyrin (74%), 5-(4-iodinphenyl)-10,15,20-triphenylporphyrin (76%), 5-(4-hydrazinephenyl)-10,15,20-triphenylporphyrin (67%) and 5-(4-bisphenyl)-10,15,20-triphenylporphyrin (32%). Therefore an efficient way of synthesizing unsymmetrically substituted TAPs was developed.

利用芳胺的重氮化及重氮盐反应，研究了5-(4-氨基苯基)-10，15，20-三苯基卟啉上氨基官能团的转化反应，以较高产率合成了5-(4-羟基苯基)-10，15，20-三苯基卟啉(80%)、5-(4-氯苯基)-10，15，20-三苯基卟啉(74%)、5-(4-碘基苯基)-10，15，20-三苯基卟啉(76%)、5-(4-肼基苯基)-10，15，20-三苯基卟啉(67%)和5-(4-联苯基)-10，15，20-三苯基卟啉(32%)等一系列含单个para-取代基的meso-四芳基卟啉，为合成不对称取代的芳基卟啉提供一条有效途径。

The detected phenolic, gallic acid was gradually increased with continuous cropping years increasing, vanillic was steady in soil of different continupus cropping years, ferulic acids had more content in soil of five-year continuous cotton cropping, but remarkably reduced with ten-year continuous cropping.7 It was found that the p-hydrobenzoic, vanillic, gallic acid and ferulic acids in different comentration inhibited/stimulated the spore germination and mycelium growth of cotton verticillium wilt.

没食子酸含量随着连作年限增加在土壤中逐渐增加，香草醛在不同连作年限土壤中含量较稳定，而阿魏酸连作5年土壤中含量最高，连作10年时显著下降。7不同浓度的对-羟基苯甲酸、阿魏酸、香草醛和没食子酸对棉花黄萎病病菌孢子萌发和菌丝生长产生促进或抑制的化感作用。

The chlorin e6 7 and chiorin 11 were oxidized further with osmium oxide in the same oxidization condition to yield bateriochlorin 8 and 12, respectively.

卟吩醛2在碱性条件下转化为卟吩e6三甲酯7，2与烷基溴化镁的格氏反应给出脱镁叶绿酸醇9，选择高钌酸四丙基铵和N-甲基吗啉N-氧化物将3-位羟基氧化成羰基，所生成的卟吩二酮10在酸性条件下脱去甲酸甲酯生成焦脱镁叶绿酸衍生物11，用四氧化锇对7和11实施氧化，则分别转化为细菌卟吩衍生物8和12。

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。