羟基

On investigation of the soft coral Sarcophyton digitatum for the first time anew polyhydroxylated sterol S-D-1 was obtained.

本论文首次对指状肉芝软珊瑚进行了化学研究，从中分离并鉴定了一个新的多羟基甾醇(S-D-1)和鲨肝醇(S-D-2)。

The structures were elucidated by spectral analysis and chemical evidence.Result:Six compounds were isolated from the plant and identified as alpinumisoflavone,wighteone,daidzein,genistein,vittadinoside and stigmasterol.

结果 ：从该植物中分离得到6个化合物，分别鉴定为高山金链花素，4′，5，7 三羟基-6-异黄酮，大豆素，染料木素，维太菊苷和豆甾醇。

Their structures were identified by chemical and spectral analysis. RESULTS Five compounds were isolated and identified as stigmasterol 3-O-β-D-glucopyranoside, 20β-hydroxy-ecdysone,β-L-thymidine, pennogenin 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside and pennogenin 3-O-α-L-rhamnopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→4)-[α-L-rhamnopyranosyl-(1→2)-]-β-D-glucopyranoiside.

结果 分离并鉴定了5个化合物，分别是Δ5，22-豆甾醇3-O-β-D-葡萄吡喃糖苷，20β-羟基蜕皮激素，β-L-脱氧胸腺嘧啶苷，偏诺皂苷元3-O-α-L-鼠李吡喃糖基－(1→2)-β-D-葡萄吡喃糖苷和偏诺皂苷元3-O-α-L-鼠李吡喃糖基－(1→4)-α-L-鼠李吡喃糖基－(1→4)-［α-L-鼠李吡喃糖基－(1→2)-］-β-D-葡萄吡喃糖苷。

Stilbene, dibenzene methane and non-phenolic 5-5' type substructures in lignin were stable to LMS treatment, and difficult to be degraded.

LMS处理时木素发生α-位羟基的氧化产生α-羰基，并在其后的碱处理段被降解成小分子量的碎片。

Are there any similar effects of stilbene derivatives on animals as they do on plants? In the present work, the chemical modification of resveratrol is investigated in detail. Furthermore, virtual screening, bioactivity evaluation and structure-activity relationship analysis are done on the designed molecules.

本论文力图探讨茋类化合物是否对动物体具有类似其在植物体中的免疫功能，以代表性的天然茋类化合物白藜芦醇(Resveratrol，3，5，4\'-三羟基-反-1，2二苯乙烯)为研究出发点，进行分子设计、虚拟筛选、活性评价和构效关系分析。

So the oxidation of diethyl stilbestrol was that two phenolic hydroxyl groups were oxidated to carbonyl group by two electrons and two protons process.

所以己烯雌酚的氧化过程为两个酚羟基经过2质子2电子反应被氧化成羰基。

A computer-aided local transient flow property measuring system was developed using a high speed CCD camera coupled with optical fibers in order to study the Gas-liquid-solid three-phase jet loop reactors. SnO2 crystal films were orientally deposited on the alkoxysilane molecule-coated hydroxyl glass substrates so as to prepare surface-marked particles as the tracers. An image analysis system was established to identify different phases. Stroboscopic photography was utilized to extend the measure range. The developed measuring and analysis system was capable of determining accurately the local transient flow property in a G-L-S jet loop reactor. Based on the above system, local transient flow properties of gas, liquid, and solid phase were measured and studied the influences of fluid property, operation and configuration parameters on the reactor.

以气液固三相喷射环流反应器为研究对象，将高速CCD和光纤束耦合制成局部瞬态流动特性微机数据采集及图象处理系统，利用MPS硅烷分子在带有羟基的玻璃基底上的自组装引导SnO2晶态膜层在功能化表面上进行沉积，以获得表面标记的示踪粒子，解决图象处理技术与相的识别的问题，利用频闪技术拓展了测量上限，得到可以准确测定气液固三相喷射环流反应器中局部瞬态流动特性的测试系统；采用上述测试技术进行喷射环流反应器中局部气相、液相与固相瞬态流动特性的实验研究，并考察物性参数、操作参数与结构参数的影响规律。

By reactions of p-hydroxybenzoic acid with the chlorides of adipic acid, suberic acid, sebacic acid and 1,10-decanedicarboxylic acid respectively four new diacids, and then their dich-lorides, were obtained. The four diacids were found to be thermotropic.

将己二酸、辛二酸、癸二酸、1，10-十二烷基羧酸经酰氯化后，分别与对羟基苯甲酸合成，得到了四种二元羧酸以及与其相应的四种二元酰氯，并发现前者具有热致液晶性。

aim: to establish qualitative and quantitative analysis methods of 7, 4′ bihydroxylisoflavone 3′ sulfonate.

目的：建立7，4′二羟基异黄酮 3′磺酸钠的定性和定量分析方法。

Based on the crystal structure of sulfonium salt and the reaction results, it was proposed that the β-hydroxy of the sulfonium salt play a key role in the highly stereoselective cyclopropantion reation.

根据硫盐晶体结构和硫盐在反应中所表现的性质，认为硫叶立德 b -位的羟基可能是反应取得高对映选择性的关键。

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。