醇基

Methods:Dehydration of D-mannitol,followed by a reaction sequence of selective protection,benzylation,deprotection,tritylation,benzylation and removal of the trityl group,afforded the title compound.

以D-甘露醇为原料构建2，5-脱水-3，4，6-O-三苄基-D-葡萄糖醇的手性分子骨架，通过选择性地对多羟基的保护和脱保护达到对产物分离的目的。

The methyl pheophorbide-a (5) was oxidized with osmium oxide and sodium periodate to give chlorin 8 which was converted into aldehyde purpure-18 (9) and purpure-7 trimethyl ester (10) by air-oxidation in butanol in the presence of sodium.

选用四氧化锇和高碘酸钠将5氧化成卟吩醛(8)，在丁醇中以丁醇钠作催化剂， 8的氧化和重排反应给出3-甲酰基紫红素-18酯(9)和紫红素-7三甲酯衍生物10。

The process includes the steps of reacting a plurality of ethylenically unsaturated monomers and a reaction moderator with a macromer having induced unsaturation in the presence of a carrier polyol, a free radical polymerization initiator, and a first graft polyol.

本发明方法包括使多种烯键不饱和单体和反应调节剂与具有诱导不饱和度的大分子单体在载体多元醇、自由基聚合引发剂和初级接枝多元醇存在下反应的步骤。

Extracted DNA by CTAB, in proportion to the additions of PVP and β-mercap toethanol to the extraction buffer were capable of preventing browning from taking place in the extraction, Tris-Phenol (Stabilized with 0.1M Tris, pH 8.0)/Chloroform/isoamyl alcohol were used to remove protein and impurity in the second extraction, during crude DNA used to Isopropanol DNA and deterged by DNA detergent, without using RNase remove RNA, we detected the quality and concentration of DNA respectively for normal leaves and drought stress leaves by Agarose gel electrophoresis of genomic DNA and ultraviolet spectrometry photo.

用20%聚乙二醇(polyethylene glycol，PEG6000)模拟干旱，采取CTAB提取缓冲液，按一定比例加入PVP和β-巯基乙醇，用Tris平衡酚－氯仿－异戊醇除去蛋白质及杂质，在粗提时用异丙醇沉淀DNA，并用DNA洗液（10mmol/L醋酸铵，75%乙醇）洗涤DNA，在纯化时用乙醇沉淀DNA，且没有加入RNase去除RNA的方法，分别提取2个品种正常和干旱胁迫的苹果属叶片总DNA，并对提取的DNA进行琼脂糖凝胶电泳和紫外分光光度计检测。

The effects of different of categories surfactants, the proportion of surfactant and cosurfactant , the chain lengths of alcohol and alkane, temperatures and pH values on the W/O microemulsion phase areas are systematically studied in the dissertation. SEM and laser scatting techniques are used to verify particles'sizes of W/O microemulsion. Consequently, a system TritonX-100/n-C〓H〓OH (weight ratio 1: 1)/C〓H〓/H〓O is obtained which is a stable system with relatively large W/O microemulsion phase area.

本文系统研究了表面活性剂种类、助表面活性剂的链长、表面活性剂和醇的配比、烷烃的链长以及温度、pH值等对W/O微乳液相区域的影响，并用SEM、激光光散射等对微乳液粒度进行了表征，从而获得一种稳定的、W/O微乳液区域较大的体系：壬基苯酚聚氧乙烯醚(TritonX-100)/正戊醇(质量比1：1)/环己烷/水体系。

The application, proposed hydrotalcite-like compounds as a new type of environmentally friendly solid catalysts in the aldol condensation, nitrile hydrolysis, epoxide ring-opening reaction of the oxidation of aromatic compounds, alcohols oxidation, reduction of nitro compounds, and many other important reactions in organic synthesis has an important application potential, and with little pollution compared to conventional catalysts, easy separation of advantages of high reactivity.

叙述了水滑石类化合物作为固体酸碱催化剂、氧化还原反应催化剂、催化剂载体等方面的应用情况，提出了水滑石类化合物作为一类新型的环境友好的固体催化剂，在醇醛缩合、腈类水解、环氧化物的开环反应、芳烃类化合物的氧化、醇类氧化、硝基化合物的还原等许多重要的有机合成反应具有重要的应用前景，并且与传统催化剂相比具有污染小、易分离、反应活性高等优点。

The polymer particles were prepared by copolymerization of phthalic aldehyde, allyl mercaptan and ethylene glycol dimethacrylate after heating. The fluorescence intensity of the polymer particles was very weak.

利用邻苯二甲醛与烯丙基硫醇、乙二醇二甲基丙烯酸酯在偶氮二异丁腈引发下热聚合制得了一种新型聚合物颗粒。

Nine sugars and five sugar alcohols were analysed by HPLC with a differenctial refractometerdetector. p-Methoxyaniline and benzoyl chloride were used to the pre-column derivatization of sugar and sugar alcohol, in which a ultraviolet absorption organic group was added, Then the derivatives were detected sensitively by an UV monitor sensitively.

采用高效液相色谱示差折光检测器，对9种糖和五种糖醇进行了分离检测；另以对甲氧基苯胺和苯甲酰氯为衍生试剂，分别对糖和糖醇进行柱前衍生，使其接上紫外吸收基团，然后用紫外检测器进行检测。

The catalytic performance of PhTMG was evaluated in the reaction for synthesis of diethylene glycol bis via carbon dioxide route and the highest yield of ADC was 95.3%.

考察了PhTMG对以二甘醇、氯丙烯和CO2为原料合成二甘醇双烯丙基碳酸酯反应的催化性能，ADC的最高收率为95.3%。

Separation of racemic mixtures of thirty-eight secondary aromatic alcohols and arylethanediols with different substituting group was achieved with HPLC by using Chiralcel OD and Chiralcel LJ as chiral stationary phase and hexane/2-propanol mixtures of different ratios as eluents. The chromatographic parameters of these racemates on OD and OJ columns were examined.

在ChiralcelOD和ChiralcelOJ两支多糖类手性固定相上，以各种不同配比的正己烷-异丙醇为洗脱剂对38种带有不同取代基的芳香仲醇及芳香乙二醇类手性化合物的对映体进行拆分，考察了这些外消旋体在这两支手性柱上的色谱行为。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。