烯

Ginger oil:-zingiberene,(6)-shogaol and β-caryophyllene.

姜油：姜烯、丁香烯和姜烯酚等。

The structures of three key active constituents are confirmed, and the structure of one main impurity β-caryophyllene is also confirmed; the wrong assignment of 13C-NMR of β-caryophyllene was firstly rectified.

不仅对榄香烯原料药的3个主要活性成分进行了结构确证，而且对原料药中的1个主要杂质成分β-石竹烯进行了结构确证，并首次对文献中β-石竹烯碳谱数据中有误的归属进行了纠正。

In order to solve the problems with heavy turpentine, such as complex constituents, vicinal boiling point, difficult to separation and hard to comprehensive utilization, the α-santalene was converted to natural structure similar product α-santalol by light-oxidize reaction, and caryophyllene epoxide was obtained at the same time.

摘要为了解决重质松节油组成复杂、沸点相近导致分离困难、难以深加工综合利用等问题，利用光氧化反应技术，将其中的α-檀香烯转化为与天然α-檀香醇结构相似的檀香型新香料－α-檀香烯醇，同时可得到环氧石竹烯。

The searching result indicated that many components such as 2-Heptenal,-, Hexadecanal, Octadecanal, Megastigma-4, 6, 8-triene and Megastig-matrienone were identified the first time in studies of aroma components of Chaenomeles fruits.

检索结果表明，试验检测出的-2-庚烯醛、十六醛、十八醛、甲酸叶醇酯、辛酸环己酯、4，6，8-巨豆三烯、巨豆三烯酮等多种化合物，在木瓜果实香气成分研究中尚属首次发现。

In this paper,firstly a series of acryloxyl derivatives were synthesized from the dehydrogenated abietic acid,a main composition of disproportionated rosin, through acyl chloridation and esterification.The derivatives included the (β-acryloxyl ethyl) esters of dehydrogenated abietie acid,(β-methacryloxyl ethyl) esters of dehydrogenated abietic acid and (β-methacryloxyl propyl)esters of dehydrogenated abietic acid.

论文首先以歧化松香中的主要成分脱氢枞酸为模型化合物，采用酰氯化、酯化手段合成了它的一系列丙烯酰氧基衍生物，包括脱氢枞酸酯、脱氢枞酸(β-甲基丙烯酰氧基乙基)酯和脱氢枞酸(β-甲基丙烯酰氧基丙基)酯。

The main constituents of the essential oil from the seeds of Schisandra chinensis were found to be Copaene,α-Farnesene and α-Cubebene.Some components such as δ-Selinene,Germacrene B and Germacrene D,etc.,have not been reported before.

五味子种子挥发油的主要成分为烯，α-金合欢烯、α-荜澄茄油烯，与以前报道的果实挥发油成分有所不同。

Polyvinyl alcohol acetalizing conjugated olefine aldehyde; starch; crolein; crotonaldehyde; reaction mechanism

工程科技I，化学，高分子化学聚乙烯醇缩共轭烯醛；淀粉；丁烯醛；丙烯醛；反应机理

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

The preparation method of cyclopentadiene from bicyclopentadiene with liquid phase thermal decomposition method is studied.

研究了采用液相热分解法由双环戊二烯制备环戊二烯的实验条件。该法操作简单，环戊二烯纯度达95%，收率可达85

The preparation method of cyclopentadiene from bicyclopentadiene with liquid phase thermal decomposition method is studied.

研究了采用液相热分解法由双环戊二烯制取环戊二烯的方法。该法操作简单，连续化。环戊二烯纯度达98％－99％，收率85

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。