醚

The X-ray diffraction shows that the resin is crystalline. The heat analysis shows that the resin is well heat-resistant and has very good thermal stability and T=101℃. The T is better 10℃ than polyphenylene sulfide. The PASI resin will be applied abraod.

表征结果表明，聚合物为设计聚芳硫醚酰亚胺结构；X射线衍射表明聚合物为结晶性聚合物；热性能测试表明，聚合物的玻璃化温度为101.91℃，高于聚苯硫醚(87.00℃)，聚合物具有良好的热性能。

And various pharmacodynamical parameters of α-asarone, a main effective constituent of Acrous Gramineus, in the body of rat have also been tested and the result has indicated that α-asarone taken orally can be absorbed quickly and distributed widely.

测定其主要有效成分α-细辛醚在大鼠体内各项药物动力学参数，结果表明：α-细辛醚口服吸收快，在大鼠体内分布广泛。

Production capabale of 2-phenoxy ethanol phenyl cellosolve and propylene glycol phenylate reach 10000 tons per year, it will become the biggest production base of alcoho ether in Asia.become a biggest production base of alcoholic and ether in Asia.

部分产品直接出口，创汇超百万美元。乙二醇苯醚，丙二醇苯醚年生产能力达到10000吨，成为亚洲最大的醇醚生产基地。

Item name: 2-phenoxy ethanol phenyl cellosolve, Propylene glycol phenylate

项目名称：乙二醇苯醚，丙二醇苯醚

In the presence of Pt catalyst, polyhydrodimethylsiloxane reacted with allyl polyoxyethylenepolyoxypropylene ether (F-6) by hydrosilylation to form an intermediate polyether silicone, which further undergo phosphation reaction with phosphorous pentoxide, a kind of phosphate modified polyethersiloxane surfactant was prepared.

采用铂作催化剂，通过含氢硅油和端烯基聚醚（F-6）的硅氢化加成反应先制得聚醚硅油中间体，再将其和五氧化二磷进行酯化反应，制得了一种磷酸酯型有机硅表面活性剂。

Now, a convenient, efficient pinacol coupling of aldehydes mediated by zinc in good yields has been carried out in ammonia water in the presence of a little crown ether. Adding a small amount of crown ether was highly effective to enhance the yields of pinacol from 63% to 84%.

本文报道一种简便、有效的水相呐偶合反应，它是在含有少量冠醚的稀氨水溶液中，使用锌粉促进醛基化合物进行水相呐偶合反应，其中加入少量的冠醚有助于提高反应的产率，呐醇产率由63%提高到84%。

A reduction-coupling-etherification reaction between aromatic aldehydes or ketones (1) and alcohols ( 2 ) to yield corresponding diether ( 3 ) of pinacol in the presence of tin and chlorotrimethylsilane.

在三甲基氯硅烷、四氢呋喃体系中，芳香醛、酮和醇在金属锡的作用下发生还原-偶联-醚化反应生成相应的频那醇二醚类化合物。

The FTIR of lignin-based polyhydric alcohol shows new characteristic peak of carbonyl is formed and the characteristic peak of aromatic ring and polyether at 1600cm-1 and 1110cm-1 respectively, which induce there is linkage of chemical bond.

所得木质素多元醇通过红外光谱图表明在1750cm-1附近有新的酯羰基生成，并且在1600cm-1含有木质素的芳香环和1110cm-1的聚醚链，表明木质素磺酸钙与聚醚多元醇在互溶过程中有化学键的接合。

The main three parts of the present study are: the preformulation study involving screening the proper enhancers for transdermal aborption of α-asarone;Formulation study and developing a drug-in-adhesive transdermal patch of α-asarone using Eudragit E100 as pressure sensive adhesives;The α-asarone reservoir patch was prepared using 1 %HPMC of ethanol solution as medium and EVA membrane for controling the release of drug, and do the research its bioavailability.

主要内容有以下三个方面：药物经皮吸收制剂开发的处方前研究工作；采用Eudragit E100为压敏胶材料，进行了α-细辛醚胶粘剂分散型贴片的研究；以1%的HPMC的醇性溶液为储库介质，以EVA膜为控释膜，进行了α-细辛醚储库型贴片和生物利用度的研究。

The solid-liquid reaction method was used for the preparation of HPLC aryl-bonded silica gel stationary phases, including 3, 5-dinitrobenzyl, quinolinyl ether and 1, 1'-di(2-naphthol) ether bonded silica gel stationary phases by using N-(β-aminoethy1)-γ-aminopropylmethyldimethoxy silane and 3-glyci-doxypropyl trimethoxylsilane as coupling reagents, respectively.

采用固液相连续反应，以N-－γ-氨丙基甲基二甲氧基硅烷和γ-丙基三甲氧基硅烷为偶联剂，分别制备了二硝基苯甲酰胺基、喹啉醚基和联萘酚醚基三种芳基键合硅胶固定相。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。