烯醇

Chemical experiments and carbon nuclear magnetic resonance studies showed that there were two addition manners,l,2-and l,4-additions when α-butenal,as an unsaturated aldehyde,conducted an acetalization reaction with polyvinyl alcohol.

化学分析法及碳核磁共振研究表明，作为不饱和醛的α-丁烯醛与聚乙烯醇在水溶液中进行缩醛化时存在着 1，2-加成与1，4-加成两种反应方式。

Various synthetic method of 1,3-propanediol were introduced and compared, including hydration and hydrogenation of acrylaldehyde, carbonylation of epoxy ethane , microbiological fementation, the process starting from methyl aldehyde, etc.

介绍了1，3-丙二醇的几种制备方法，即丙烯醛水合-氢化法、环氧乙烷羰基化法、微生物发酵法和以甲醛等为原料的方法。

The reaction of C_(60) with freshly prepared sodium alkoxide solution under aerobic condition was well investigated,which provides a facile protocol to synthesize a variety of C_(60)-fused tetrahydrofuran derivatives with oxygen atom directly attached to fullerene cage.

系统的研究了C_(60)与新鲜配置的醇钠溶液在O_2存在条件下的反应，得到了一系列氧原子直接与C_(60)分子相连的富勒烯四氢呋喃结构的衍生物。

This thesis mainly focused on the sidearm effects in catalytic Wittig-type olefination and catalytic asymmetric 1, 3-dipolar cycloaddition between nitrones and alkylidene malonates.

本文主要研究了催化的叶立德烯基化反应及催化的不对称1，3偶极加成反应中的边臂效应。在论文的第一部分，我们设计、合成了聚乙二醇负载的烷基碲化合物33(Bu-Te-PEG-Te-Bu)。

Objective To research the effects of a chiral aminoalcohol in the asymmetric allylation of acylhydrazones.

目的 研究手性氨基醇在酰腙不对称烯丙基化反应中的促进作用。

Objective: To study the antiasthmatic effect of n-butylidene phthalide for transdermal administration in guinea pigs.

目的：探讨正丁烯呋内酯制成聚乙烯醇凝胶贴片透皮给药对豚鼠的平喘作用。

The results show that there is intensive synergistic effect among cetyltrimethylammonium bromide, benzalacetone and polyethylene glycol. A bright and compact nanocrystalline zinc was produced due to the coexistence of such three additives.

结果表明，十六烷基三甲基溴化铵、4-苯基-3-丁烯-2-酮和聚乙二醇三种添加剂之间具有较强的协同作用，采用三者组成的混合添加剂可制备出光亮致密的纳米晶锌镀层。

Chapter 4: Synthesis of 1,5-diary 1-1,4-pentadien-3-ones from acetone or benzalacetone with aromatic aldehydes results in 86-97% yield with potassium hydroxide as catalyst under ultrasound irradiation in 5-60min.

为合成氰基环己醇找到一条方便高效的合成方法。第四章：研究了超声辐射下，以氢氧化钾为催化剂，芳香醛与丙酮及亚苄基丙酮之间反应合成1，5-双苄基-1，4-戊二烯-3-酮。

The results indicated that the UV coatings made from epoxy acrylate resin/TPGDA monomer by the weight ratio of 80/20, and 3% dosage of benzil dimethyl ketal photoinitiator had an excellent films properties such as hardness, tensile strength, gloss and weatherability, while it possessed a poor impact resistance and adhesion of films.

试验结果发现，以预聚合体/单体比例为80/20、单体种类为二丙烯酸三丙烯乙二醇酯、光引发剂Benzil dimethyl ketal添加量为3%调配而成之UV涂料，其涂膜硬度、拉伸强度、光泽度及耐候性等性质优良，但涂膜耐冲击性、附著性不佳。

Two key compounds butenonitrile and benzothiazole were found.

GC-MS检测解析结果为雪里蕻腌菜的挥发性成分主要为烃、醇、酯、腈及含硫和氮的杂环化合物，其中丁烯腈及苯并噻唑与雪里蕻腌菜的特征风味有关。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。