羟基酮

Coumarinyloxy)-6-methoxyl-7-hydroxycoumarin,β-sitosterol, 3-stigmast-5-en-3- 3 -D-Glucopyranoside . 3-(7-coumarinyloxy)-8-(7-hydroxycoumarin-8-yl)-7-hydroxycoumarin rhamnoside and Sucrose. Compound I , V, IX and XI were isolated from barks and stems of this plant for the first time and compound VI and VI were isolated from flowers of this plant for the first time, too.

共鉴定了其中11个化合物，根据理化性质和波谱数据鉴定确定为：丁香甙，结香甙C(Edgeworoside C Ⅱ)，7-羟基香豆素(7-hydroxycoumarin Ⅲ)，5，7-二甲氧基香豆素(5，7-dimethoxycoumarin Ⅳ)，卫矛醇，异吲哚-1，3-二酮1H-iso-Indole-1，3(2H-dione Ⅵ，西瑞香素(Daphnoretin Ⅶ)，β-谷甾醇(β-sitosterol Ⅷ)，胡萝卜甙(Daucosterol Ⅸ)，结香甙A(Edgeworoside A Ⅹ)和蔗糖。

A method for the micro determination of germanium by flow injection－spectrophotometry with CCD diode array detector is reported, based on the color reaction between germanium and salicyl fluorone in the presence of cetyl trimethyl ammonium bromide. A good linear relationship was obtained in the range of 0～3.0 mg/L for germanium.

研究了在溴化十六烷基三甲铵存在下，锗与2，3，7－三羟基－9－水杨基荧光酮－6的显色反应，采用二极管阵列检测器，建立了检测微量锗的流动注射分光光度法。

Six crystalline substances were isolated from the stem and root of Syzygium buxifoli um and identified as friedelin,βsitosterol,ursolic acid,pomolic acid,oleanolic acid and βdaucosterol..

摘要从赤楠的茎和根部的乙醇提出物中，分离和鉴定了6个化学成分，分别为木栓酮，β谷甾醇，乌苏酸，19α羟基乌苏酸，齐墩果酸和胡萝卜甙。

In the first part, the prototropic hydroxy-oxo tautomerisms of 2 (1H)- pyridones/2-hydorxypyridines, one of the most important model systems in molecular biology, have been investigated with self-consistent reaction field method based on continuum model. The influence of the nature and position of substituent groups, the existence of intramolecular hydrogen bonding and tautomeric competition between 2-hydroxy and 4-hydroxy on the tautomeric equilibria have also been examined.

第一部分，首先从溶剂敏感的异构化性质入手，用基于连续介质的自洽反应场理论方法对一类重要的生化模型体系—2（1H）-吡啶酮／2-羟基吡啶互变异构体系进行了研究，系统地考察了取代基性质、取代基位置、分子内氢键的形成以及互变异构竞争的存在对异构化平衡的影响。

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。

Trihydroxy fluorones ; refactory metals ; data base system

三羟基荧光酮类试剂；难熔金属离子；数据库系统

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。

High-pressure liquid chromatography was used to determine the retention time and integral area ratio of every esterified production.

对不同条件下合成的三羟基二苯甲酮酯化215感光剂进行高效液相色谱分析，确定了产物中各酯化产物的保留时间及其在产物中所占的积分峰面积比。

The method to purify compound 4 was resolved. A novel method to prepare the intermediate from phenylacetyl chloride was selected in this paper. The facile synthetic scheme put forward in this work is simple to operate and has the characteristic of high yield and good feasibility.

解决了终产品4的分离纯化难题，采用生成衍生物再进行水解的方法达到了纯化目的；提出了合成中间体3-羟基-4-苯基-吡喃-2，5-二酮(7)的较为新颖的方法，操作简单，各步中间体无需作进一步纯化便可进行下一步反应，从而得到了结构较新颖的终产品4。

Synthesis 3,5-dihydroxytoluene by ethyl acetoacetate and diketene as material(yield 6%),by 3-methyl-4-chlorophenol and KOH as material(yield 30-40%)respectively,It was solved for product separation and purify.

分别以乙酰乙酸乙酯与双乙烯酮为原料(收率6%)、3-甲基-4-氯苯酚与氢氧化钾为原料(收率30-40%)合成了3，5-二羟基甲苯，解决了产品分离纯化问题。3-甲基-4-氯苯酚路线进行了中试，中试收率为20%。

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。