烯基

Natural rubber which is cis 1,4 - polyisoprene is composed of isopentenyl pyrophosphate In Hevea brasiliensis.

巴西橡胶树中的天然橡胶是顺式-1，4-聚异戊二烯（cis-1，4-polyisoprene），其基本组成单元是异戊烯基焦磷酸(isopentenyl diphosphate ，IPP)。

On the other hand, the corresponding bromohydroxylation of 1, 2-allenyl sulfides with Br〓 and water should be carried out in aqueous acete nitrile at 0℃.

在1，2-联烯基硫醚分子中由于同时存在着硫原子和具有两个相互垂直π-键的累积双烯结构，使其具有一些特殊的反应性能。

The title anti-fogging coating was prepared from film-forming substance such as UV curing of n-butyl methacrylate,β-hydroxy ethyl acrylate,acrylamide and sodium propenyl alkyl ether hydroxyl sulfonate,and proper solvents, crosslinker s,photoinitiators and additives.

以光敏丙烯酸酯低聚物、甲基丙烯酸丁酯、丙烯酸-β-羟乙酯、丙烯酰胺及丙烯基烷醚羟磺酸钠为主要成膜物质，再配以适量的溶剂、交联剂、光敏剂及各种助剂制成UV固化防雾涂料。

The biosynthesis of the quinoid nucleus are the same in all coenzyme Qs. The biosynthesis of the isoprenoid side chain determine the kind of coenzyme Q.

芳香环的合成在所有的辅酶Q族物质中都是相同的，异戊烯基侧链的长度则决定了辅酶Q的种类，这里存在一个关键酶，即异戊烯焦磷酸合成酶。

Halohydroxylation reaction of allenyl sulfides occurs predominately with the β,γcarbon-carbon double bonds with the halogen atom bonded to the middle carbon atom of the allene moiety.

在1，2-联烯基硫醚分子中由于同时存在着硫原子和具有两个相互垂直π-键的累积双烯结构，使其具有一些特殊的反应性能。

Objective To synthesize 10-O-adipic acid-[2'-methoxy-4'-(3"-keto-1"-Butenyl)-Phenoxy-]-dihydroartemisinin conjugate.

目的 合成10-O-己二酸基－［2'-甲氧基4'-（3&-酮－1&-丁烯基）－苯酯］－双氢青蒿素酯。

The present invention discloses a polycarboxylic acid copolymer which is obtained by copolymerization of monomer components comprising a polyalkyleneimine unsaturated monomer (A2) and an unsaturated carboxylic acid monomer, the polyalkylene glycol unsaturated monomer (A2) having an oxyalkylene group bonded to a polyhydric alcohol residue, and the monomer component containing an unsaturated monocarboxylic acid monomer.

公开了一种多元羧酸共聚物，它是通过单体组分共聚制得的，所述单体组分包括聚二醇不饱和单体(A2)和不饱和一元羧酸单体，所述聚二醇不饱和单体(A2)具有使氧化烯基结合到多元醇残基上的结构，所述多元醇残基平均每个分子具有不少于3个羟基。

Thus, the phosphonate moiety is remainedin the products and this methodology can be used in the synthesis of substituted vinylphosphonates.

因此在本烯化反应中保留了膦酸酯基团，可用来合成取代的烯基膦酸酯。

Synthesis with carbocyclic compounds, such as cyclodienylsilane, quinic acid and norbornene etc, as starting materials is discussed in detail.

重点介绍了以环二烯基硅烷、奎宁酸、降冰片烯等碳环化合物为原料合成碳环糖的进展。

A similar reaction of the sulfur analog gave only the product of tetramethylene bridged bisdititanium halides.

在企图合成硫桥环戊二烯基化合物时，得到的却是四亚甲基桥联双环戊二烯基金属衍生物。

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。