烯基

The copolymers of 2-acrylamio-2-methyl propane sulfonic acid and other water soluble monomers are indispensable chemicals in various papermaking plants,which can be used as water-displacing assistant agent,sizing agent and pigment dispersant of color coating and to enhance the strength of paper.

造纸2-丙烯酰胺基-2-甲基丙磺酸和其他水溶性单体的共聚物，是各类造纸厂不可缺少的化学品，它可作为排水助剂、施胶剂，增加纸的强度，还可作为彩色涂层的颜料分散剂。

The main by-product s and their separation and recovery technologies were discussed for cyclohexanone gas-phase Beckmann rearrangement.

探讨环己酮肟气相Beckmann重排主要副产物及其分离回收方法，研究1-氮杂-2-乙氧基-1-环庚烯、1，3，4，5-四氧吖庚因-2-酮及其同分异十句体等副产物回收利用生成已内酰胺的方法。

N-Benzylacryl amide was synthesized using acrylonitrile and benzyl alcohol as raw materials and sulfuric acid as catalyst.

以丙烯腈和苯甲醇为原料，浓硫酸作催化剂，合成了N-苄基丙烯酰胺。

One story says the Archimedes made a burning mirror to set fire to the Roman ships which were attacking Syracuse.

有一个故事说阿基米德制造了一个火焰镜，点烯了进攻叙拉古的罗马战船。

One story says the Archimedes made a burning mirror to set fire tory says the Archimedes made a burning mirror to set fire to the Roman ships which were attacking Syracuse.

有一个故事说阿基米德制造了一个火焰镜，点烯了进攻叙拉古的罗马战船。

In the course of our study the chemistry of arenes contaning allylic acetates moiety under the catalysis of palladium, we found an efficient synthesis of benzocycles via intramolecular Friedel-Crafts reaction of halogen free 6-acetoxy-4alkenyl arens.

我们在设计钯催化的碳—氢键活化时，发现了含有烯丙基醋酸酯侧链的芳烃的三氟醋酸促进的分子内的Friedel-Crafts反应，从而为有效合成苯并六元环结构提供了一个方便的方法。

The rate constants of radical and electrophilic addition to alkenes are dominated by different factors.

烯烃的自由基加成和亲电加成速率受不同的因素控制。

The key steps were the stereospecific conversion of both allylie carbamates 10 and 13 into 11 by Li_2Cu_3(CH_2)_5 and the stereoselective hydroxylation of unsaturated side chain by OsO_4-NMO.

合成的关键步骤是用Li_2Cu_3(CH_3)_5立体专一地转化烯丙醇苯胺基甲酸酯10和13成为11和用OsO_4-NMO在化合物16的不饱和侧链上立体选择性羟基化。

The lipid oxidation of the muscles of breast and leg in dry-cured duck during processing was studied by determination of the peroxide value,TBARS value,carbonyl compounds and conjugated dienes.

通过对过氧化值、硫代巴比妥酸值、羰基值和双烯值等氧化指标的测定，研究南京板鸭加工过程中各工艺点板鸭肌肉脂肪的氧化变化。

For examples as an additive for lithiumion batteries,as a component of surface coatings or as a monomer for the preparation of polyvinylene carbonate,and the Diels-Alder reaction was carried out successfully between vinylene carbonateand many dienes.

碳酸亚乙烯酯作为聚合物单体可在自由基引发作用下形成较高分子量的聚碳酸亚乙烯酯，另外VC可以和许多二烯类化合物发生反应，合成出许多精细化工中间体。

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。