戊烯

The crystal structure of the deoxygenating reaction product 1,1-dichlorotetraphenylcyclopentadienone of phenyl mercury with tetraphenylcyclopentadienone is reported.

本文报道了二氯卡宾(由一溴二氯苯基甲基汞产生)与四苯基环戊二烯酮脱氧反应产物的晶体与分子结构，并就其结构特征讨论了反应机理和产物的关系。

The method for preventing the formation of peroxides from cyclopen-tadiene is to seal it With nitrogen.

防止环戊二烯生成过氧化物的方法，可充以氮气长期贮存。

Its emission accounts for half of the hydrocarbons total one, and especially is very high in the rural and well vegetated areas, which greatly influences the regional environment such as ozone concentration.

异戊二烯(C_5H_8)是对流层中重要的NMHC，也是植被释放最多的挥发性有机化合物，其排放量占植物烃类总排放量的一半，特别是在农村和边远地区大气边界层中含量很高，往往对局地大气环境，如臭氧浓度有很大的影响。

Isoprenoids have the advantage that, like alcohols, they are part of the natural biochemistry of many organisms.

类异戊二烯有个跟醇类一样的优势，那便是它们是许多有机体中生物化学成分所含有的。

The reaction of sodium alkylcycloperitadienide with metal chlorides gave derivatives of bisdichlorides of titanium, zirconium and hafnium where alkyls were n-propyl and n-butyl.

本文报导烷基环戊二烯基钠与金属氯化物反应合成钛、锆和铪的双金属二氯化物以及通过卤素交换制备双钛的二氟化物的方法。

Dicyclopentadiene dioxide was hardly cured by amines or acid anhydrides alone, but can be well cured by acid anhydrides mixed with alcohols.

二氧化双环戊二烯难于被胺或单独的酸酐所固化，但能很好的被酸酐与醇所固化。

The cure kinetics of naphthyl/dicyclopentadiene epoxy resin and bis-phenoxy (3-hydroxy) phosphine oxide was investigated by differential scanning calorimetry under nonisothermal and isothermal condition.

用差示扫描量热仪研究了含萘环和二环戊二烯环结构环氧树脂NDEP和BHPPO的等温和非等温固化动力学。

Insertion of ethylacetate or DMF into 1-zircona-2-azacyclopent-3-ene complexes at 50 oC affords pyrroles in moderate yield when they quenched with KOH aqueous.

1-锆-2-氮-环戊-3-烯错合物在室温下可与乙酸乙酯或DMF进行插入反应，经由氢氧化钠水溶液水解后，可得到不错产率的比咯。

By splicing in genes from other bugs, the company was able to engineer synthetic metabolic pathways—ones that do not exist in nature—that enable the bacteria to produce isoprene from the sugars found in plant materials such as sugar cane, corn cobs and switchgrass, a tall-growing variety native to North America.

Genencor的科学家们通过将大肠杆菌的基因与其它菌类基因接合，则能研发出前所未有的代谢合成途径，使细菌能从植物所含的糖类中制造出异戊二烯，这些含糖植物包括甘蔗、玉米棒和北美特有的变异品种柳枝稷等。

The application of liquid isoprene rubber partly replacing NR by equal weight in bead filler of PC tire was investigated.

研究液体聚异戊二烯橡胶等量部分替代NR在轿车轮胎三角胶中的应用效果。

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。