Methane and propane are alkanes.
甲烷和丙烷是烷烃。
Such alkanes are the main ingredients of diesel fuel.
这种烷烃是柴油的主要成分。
WD-40 contains an abundance of alkanes—hydrocarbons that match the formula CxH2x+2, usually in a long, zigzagging chain.
WD-40含有丰富的烷烃，他们都符合饱和烷烃的通式CxH2x+2，而且往往拥有长且曲折的碳链。
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。
For example, the E. coli naturally feeds on some of the fatty acids it produces, rather than using them as a feedstock for producing alkanes.
例如，大肠杆菌以其自身合成的一些脂肪酸为食，而不是以它们为原料来生产烷类。
Soluble alkanes, fats, mineral oil, paraffin and most organic solvents.
溶于烷烃，脂肪，矿物油，石蜡及大多数有机溶剂。
Table 2 shows names for some alkyl groups, alkanes, alkenes and alkynes.
表2显示了一些烷基、烷烃、烯烃及炔烃的命名。
The straight - chain alkanes exacerbate the problem of engine " knock ".
直链烷烃使机器的“ 爆震”问题更加严重。
The paper reports the reductive coupling of aromatic ketones to alkanes by low-valent titanium salt.
本文报导用低价钛盐还原偶联芳酮为烷烃的反应。
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 effective length of carbon chain of alkanes was built up by using the polarizability effective index.
利用极化效应指数，构造了链烷烃的有效碳链长度。
A method for analysis n-alkanes, steranes and terpanes in oil by internal standard method was established.
采用内标法建立了原油中正构烷烃、生物标志物(甾、萜烷类)的分析方法。
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。
The heat of evaporation for various kinds of alkanes, alcohols, esters and aromatics were determined by gas chromatography.
本文用气相色谱测定了多种烷烃、芳烃、醇类和酯类的蒸发热。
Moreover, water has no obvious effect on the hydrogen isotopic compositions of individual n-alkanes in the simulation test.
热模拟实验中水的存在对热解烃中正构烷烃单体氢同位素组成并没有产生明显的影响。
These normal alkanes offer the favourable mineralization information and have the tracer significance for the gold mineralization.
这些不同类型的正构烷烃提供了丰富的成矿信息，具有成矿作用的示踪意义。
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；
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。
Their separation selectivities are toward alkanes, alcohols, ketones, aromatic compounds, positional isomers and some chiral compounds.
其对烷烃、醇类、酮类、芳香族化合物、位置异构体以及一些手性化合物具有良好的分离效果。
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。
Under these conditions for optimum growth, the degradation rate experiments on different initial concentrations of alkanes are carried out.
在最适生长条件下，分别对不同初始浓度烷烃进行降解率试验。
Codexis's enzymes and bacteria can turn sugar into molecules called straight-chain alkanes which have between 12 and 16 carbon atoms in them.
公司的酶和细菌能够将蔗糖转为叫做直链烷烃的分子，该类型的分子含有12到16个碳原子。
RESULTS Volatile components from EtOAc extract were complex, mainly in aromatic, long-chain alkanes, alkaloids , coumarin and ester compounds.
结果萃取物中挥发性成分较复杂，主要有芳香族、长链烷烃、生物碱类、香豆素和酯类等化合物。
The results show that lnH of alkanes and aro-matic hydrocarbons decreases with the increase of solute carbon number and solvent carbon number.
结果证明：亨利系数随着溶质碳数和溶剂碳数的增加而减少。
Selection of solvent is the key for extraction to separate n-alkanes from diesels and to improve the flow ability of diesels at low temperature.
溶剂筛选是溶剂萃取脱除柴油中正构烷烃，改善柴油低温流动性能工艺过程的关键。
The correlation results show that the method is valuable in understanding the structure performance relationship for the antiknock of acyclic alkanes.
结果表明，该方法有助于理解烷烃抗爆性能的结构-性能关系。
Then—alkanes with a complete range of carbon number are observed in the saturated hydrocarbons of the bitumen and no evidences of severe biodegradation occur.
这些沥青的饱和烃中正烷烃系列碳数分布完整，没有遭受过严重生物降解作用的迹象。
Then—alkanes with a complete range of carbon number are observed in the saturated hydrocarbons of the bitumen and no evidences of severe biodegradation occur.
这些沥青的饱和烃中正烷烃系列碳数分布完整，没有遭受过严重生物降解作用的迹象。
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