The Alkene Double Bond: a Focus of Reactivity.
烯烃的双键：重点是反应活性。
It selects and severs double bond organic matter.
臭氧选择并破坏有双键的有机物。
"One - pot" carbon - carbon double bond formation.
“一锅”法的碳-碳双键形成反应。
Compared with diolefine rubber, EPDM has less double bond.
与二烯烃橡胶相比，EPDM的双键很少。
One atom of oxygen is linked to the nitrogen atom by a double bond.
一个氧原子以双键与氮原子相连。
In the ethyne molecule, a double bond links together the two carbon atoms.
在乙烯分子中是由一个双键将两个碳原子连结在一起的。
The double bond is attacked by the oxygen, forming aldehydes and carbonyls.
双结合受氧的攻击形成乙醛和碳酸基。
So really, you can not ever rotate a double bond, it makes your molecule very rigid.
实际上，你不能转动一个双键，它使得你的分子很坚固。
So it's very important that the double bond locks it in a particular conformation.
所以双键把它们锁定在某一特定形状，是十分重要的。
They react by adding other chemical agents at the double bond to form derivatives or polymers.
这些化合物的最大用途在于双键与其它化学物质的反应。
So if we look at its length, it's actually shorter than a single bond, but longer than a double bond.
因此如果我们看它的键长的话，它实际上比单键更短，却比双键更长。
Or if we look at how strong it is, it's actually stronger than a single bond, but weaker than a double bond.
或者如果我们看键的强度的话，它实际上比单键更强，而比双键更弱。
Monounsaturated fatty acid (MUFA) is a sort of fatty acids, including a double bond in its carbon chain.
单不饱和脂肪酸(MU FA)是脂肪酸的一种，其碳链上只有一个双键。
Their cytotoxicity reduced obviously while the double bond in steroidal nucleus or side-chain was saturated.
当甾核或支链中双键被饱和时，其细胞毒性均明显降低。
The results showed that, the structure of polyurethane acrylates had great effect on the conversion of double bond.
研究发现，随着丙烯酸官能度的增多，双键转化率随之降低；
So let's take a look at what actually happens if we're talking about a carbon-carbon double bond, we're going to have a double bond.
让我们来看一看碳碳双键的情况，例如在乙烷里，我们有个双键。
Depending upon reaction conditions, the product may be a polyketone formed by addition polymerization of the ketene double bond.
随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。
Therefore, we can clearly see that imine double bond is ond kind of important antibacterial functional group of these compounds.
因此，可以明确亚胺双键是该类化合物的重要抑菌官能团之一。
The established method provides a new technical tool for the location of double bond positions in the polyunsaturated fatty acids.
所建立的方法为不饱和脂肪酸碳链中双键位置的确定提供了新的技术手段。
And there should a certain amount of double bond of carbon in the multifunctional monomers so as to suppress the degradation of PP.
若多功能单体分子中含有一定含量的碳—碳双键，则能很好地抑制降解。
The organic group further comprises at least one activating group on at least one carbon atom of the C-C single bond or double bond.
所述有机基团进一步包括至少一个在所述C-C单键或双键的至少一个碳原子上的活性基团。
And we find the same thing for these two atoms here, it's not actually a double bond, it's somewhere between a single bond and a double bond.
而且我们发现这两个原子的情况是一样的，它其实不是一个双键，而是介于单键与双键之间的。
The target molecule was synthesized through using chiral reagent, reduction of double bond, hydrogenolysis and hydrolysis of ester group.
之后，经引入手性试剂，双键还原，氢解，水解酯基得到目标产物的合成路线。
Furthermore, the existing form, main composition and their variation of double bond in the side-chain of urushiols were discussed as well.
本文还对漆酚类侧链中双键的存在形式，主要组成及变化进行了分析讨论。
Ring closing metathesis (RCM) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene.
关环转换反应是形成碳碳双键的重要反应之一，即双烯化合物在金属碳烯催化下关环得到环烯类化合物。
Its branch chains having double bond can copolymerize with vinyl monomers (such as styrene or vinyl toluene) forming a thermosetting resin.
该树脂具有外双健，可与各种乙烯基单体进一步共聚形成一系列热固性树脂。
The key reactions included the formation of 9, 15-cyclopropyl function and double bond migration in the a ring to reestablish the GA skeleton.
本合成工作的关键为9,15环丙基的形成及在重建GA骨架时a环中双键的重排反应。
The effect of the ratio of hydrogen peroxide to double bond of allyl group, reaction temperature and reaction time on epoxidation was investigated.
考察了双氧水与烯丙基双键配比、反应温度和反应时间对环氧化反应的影响。
Its molecular form, with two atoms joined by a double bond, makes life on Earth possible - but this form had never definitively been seen in space.
两个氧原子以双键形式结合形成氧分子，这种氧分子使地球上的生命成为可能，但这种氧分子从来没有在太空中发现过。
Olefin (or alkene) Any unsaturated hydrocarbon containing one or more pairs of carbon atoms linked by a double Bond (see covalent Bond, saturation).
烯烃：含有一对或多对由双键连接的碳原子的一类不饱和烃。
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