Biological lipids originate from ketoacyl and isoprene groups.

生物脂质来源于酮脂酰和异戊二烯基团。

The monomer is butadiene or isoprene;

所述单体为丁二烯或异戊二烯；

One of these petroleum by-products is isoprene.

这些石油副产品之一便是异戊二烯。

Isoprene needs to be extremely pure to make synthetic rubber.

而异戊二烯必须极其纯净才能生产出合成橡胶。

A minute study on isoprene and its affecting factors is made.

对异戊二烯及其影响因子进行了详细研究。

Isoprene can also be artificially polymerised to make synthetic rubber.

异戊二烯也可以通过人工聚合来制造合成橡胶。

Chlorination occurs adjacent to the isoprene units to form allylic chlorines.

氯化发生在异戊二烯单元附近形成烯丙基氯。

It is necessary to build a model to accurately estimate isoprene emission flux.

为准确估算异戊二烯的排放通量，建立其排放模式是非常必要的。

The emission flux of isoprene from major species in subtropical forest is also measured.

对于我国亚热带森林主要树种异戊二烯的排放速率进行了初步测定。

One of these petroleum by-products is isoprene. This is used to make the synthetic rubber in car tyres.

还有个石油副产品是异戊二烯(译者注：橡胶基质)，用来生成汽车轮胎需要的合成橡胶。

The polymerization of isoprene with supported titanium catalyst modified by n-octanol was carried out.

用负载钛催化剂在加氢汽油溶剂中引发丁二烯配位聚合。

Figure 1. Representative monoterpenes. Isoprene units are shown to indicate the common structural features.

图1。有代表性的单萜烯类。显示了异戊二烯单元的一般结构特点。

A synthetic elastomer produced by catalytic copolymerization of isobutene with no more than 3% of isoprene;

异丁烯和不大于3%的异戊二烯催化共聚所生成的合成弹性体。

The traditional isoprene generation method is usually the naphtha or C4 steam synthesis thermal decomposition.

传统的异戊二烯生成方法通常是石脑油热分解或者C4蒸汽合成。

Now a way has been found to make greener tyres by using genetically modified bugs to produce isoprene biologically.

今天我们发现了一种制造更“绿色”轮胎的方法，即通过利用基因改良的细菌来生物合成异戊二烯。

Examples of homopolymers are natural rubber, whose monomer is isoprene, and polyethylene, whose monomer is ethylene.

均聚物的例子有单体为异戊二烯的天然橡胶以及单体为乙烯的聚乙烯。

The pyrolysis mechanism of nature rubber, isoprene rubber and butadiene rubber was analysis by pyrolysis production.

并通过对裂解产物的分析研究了天然橡胶、异戊二烯橡胶和顺丁二烯橡胶的裂解机理。

The modified organism ferments sugars in the biomass to produce isoprene, in such a way that it bubbles out as a gas.

这些改良的大肠杆菌发酵生物质中所含的糖类以生合成异戊二烯，并以气体形式释放出来。

A polyisoprene in which the isoprene units are joined in the 1, 4 -manner and in which they occur in the cis isomeric form.

异戊二烯单元以1,4 -方式连接并以顺式异构形式存在的一种聚异戊二烯。

If biologically derived isoprene becomes more widely available, Mr Sanford thinks, industry could find additional USES for it.

桑福德先生认为，如果能轻而易举地获得源自生物的异戊二烯，那么工业生产还能在许多地方用到它。

The mechanism of anionic polymerization of isoprene with cyclohexane and dioxane as solvent was studied and improved by experiment.

推导了异戊二烯在环已烷-二氧六环混合溶剂中的负离子聚合机理，并通过实验进行了验证。

Luhua isoprene rubber (LHIR) is a kind of solution-polymerization polyisoprene with high cis-1, 4 content and high molecular weight.

鲁华异戊橡胶(LHIR)是一种具有高顺式- 1,4 -含量和高分子量的溶液聚合的聚异戊二烯。

The invention relates to a sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and a preparation method thereof.

一种用于聚合高顺式异戊二烯橡胶的磺酸稀土催化剂，其特征在于该催化剂是由苯磺酸钕稀土配合物及烷基铝组成；

Trees produce natural chemicals, called isoprene and terpene, that are thought to protect their leaves from too much heat and sunlight.

树木分泌的天然化学物质异戊二烯和萜烯被认为可保护树叶免受过多热量和阳光的伤害。

The experimental results showed that the mechanism of anionic polymerization of butadiene was also fit for the anionic polymerization of isoprene.

研究表明，丁二烯聚合机理原则上同样适用于异戊二烯的负离子聚合。

A synthetic rubber produced by copolymerization of a butylene with isoprene, nearly impermeable to air and used in tires, inner tubes, and insulation.

通过丁烯和异戊二烯的共聚作用化合而成的一种合成橡胶，几乎不透空气，用作轮胎、内管道和绝缘等的材料中。

Dr Alastair Lewis and his team at Britain's York University noticed how the production of isoprene, and thus ozone, suddenly went up at high temperatures.

英国约克大学的阿拉斯泰尔·刘易斯博士及其研究小组注意到异戊二烯的分泌量及随后形成的臭氧量在高温条件下陡然上升的过程。

Through the technological analysis of the trimming process for the isobutylene-isoprene rubber plugs, the structure of the trimming die has been determined.

通过对丁基橡胶瓶塞切边工艺分析，确定了丁基橡胶瓶塞的切边模具结构。

This is because they have a quiet similar microstructure, so isoprene rubber has the same excellent combination properties with natural rubber in performance.

这是因为它们有着十分相似的微观结构，因此异戊橡胶在性能上与天然橡胶有着一样的优异综合性能。