alkanes

The result showed that among the lipid substances we extracted, most compositions which had stronger antimicrobial activities are alkanes.
结果表明，抗菌活性较强的物质中大多是烷烃类物质。
Chemical fossils (e. g. alkanes and porphyrins) are often the only evidence for life in rocks of PRECAMBRIAN age.
化学化石（烷烃和卟啉）是前寒武纪地层中生命存在的唯一证据。
It concluded that there is a liner relation between the physical chemical properties of alkanes and effective length of carbon chain.
研究表明，链烷烃的许多物理化学性质与有效碳链长度成线性关系。
Synthesizing very long alkanes is not trivial, especially in the quantities and purities required to put these simulations to the test.
合成很长的烷烃并不轻松，尤其是达到实验所需要的数量和纯度。
And Virent, based in Madison, Wisconsin, is making alkanes out of sugars using a chemical, rather than a biological, process.
威斯康辛州麦迪逊的Virent正通过一种化学、而不是生物的过程从糖中提取直链烷烃。
Its chemical properties are similar to those of alkanes, but its molecule is in the form of closed ring.
其化学性质与烷烃相似，但其分子是闭环形式。
The general uses of alkanes may be divided into three categories.
The distribution pattern of the carbon isotopic compositions of the individual n-alkanes shows almost no change during this process.
同时也证明了生排烃过程不影响正构烷烃单体碳同位素组成曲线的形状；
Ethylene can also be turned into alkanes, a class of hydrocarbons that are a component of gasoline.
乙烯还可以转变成烷烃——是石油中含有的一种碳氢化合物。
They confirmed their discovery by incorporating the genes into E. coli and measuring the alkanes that the bacteria subsequently made.
他们通过将产烷必须的基因植入大肠杆菌并对最终产生的烷进行测量，验证了他们的发现。