alkanes

The alkanes are non-polar.

烷 是非 极性的.

Other components are the homologous alkanes, ethane, propane, higher hydrocarbons.

其他组分有同系烷 、 乙烷 、 丙烷以及高分子碳氢化合物.

Pollution Characteristics of n-alkanes in Atmospheric Fine Particles During Spring Festival of 2007 in Beijing

2007年春节期间北京大气细粒子中正构烷烃的污染特征

Oil & oil products and alkanes, alkenes & polymers.

石油 、 石油产品、烷烃 、 烯烃 以及 聚合物.

Methane and propane are alkanes.

甲烷和丙烷是烷烃。

N-alkane concentrations in the cuticular wax of seven temperate grass species were assayed by gas chromatography. One-way ANOVA was used to examine the effect of sampling time on the concentrations of individual N-alkanes in the same species.

利用气相色谱仪测定了7种温带常见牧草表皮蜡质层饱和烷烃（N-alkane）的浓度，对同一牧草种不同生育期的饱和烷烃模式进行方差分析。

The leaf wax of N. affinis ( Rendle) Keng f. was rarely affected by soil contribution in buried conditions, so it can reflect the early diagenetic effects on leaf wax compositions and their n-alkanes carbon isotopic compositions under buried conditions.

慈竹叶蜡在埋藏条件下很少受土壤污染，能比较客观的反映叶蜡各成分及正构烷烃同位素组成在埋藏条件下的早期成岩效应。

Based on the Wiener index ( W), a harmonic topological index ( H) is proposed. H has been shown good structure selectivity, and appears uniqueness for 149 alkanes from ethane to decane.

基于Wiener指数（W）建立调和拓扑指数（H），该指数对乙烷至癸烷的149种烷烃呈现惟一性表征。

The properties and commercial application of LIP FCC catalyst for more iso-alkanes were described.

介绍了LIP系列多产异构烷烃催化剂的性能及工业应用情况.

Advances in tungsten carbide alkanes isomerization catalysts, including their preparation and the isomerization mechanism, were reviewed.

综述了用于长链烷烃异构化的碳化钨催化剂的研究进展.

This fact shows that MTBE and ethanol retard the oxidation of alkanes.

这表明,在燃烧的起始阶段,MTBE、乙醇有抑制烷烃燃烧的作用.

The commercial production of catalyst for C_5/ C_6 alkanes isomerization process ( RISO technology) developed by the Research Institute of Petroleum Processing and its application in the first commercial unit with a capacity of 180kt/ a in China were introduced.

介绍了RISO型C5/C6烷烃异构化催化剂的工业生产过程及在国内第一套C5/C6异构化工业装置上的应用情况。

In situ MAS NMR Spectroscopy Study on Catalytic Reaction Mechanism of Light Alkanes

低碳烷烃催化反应机理的固体核磁共振研究

Alkanes undergo reaction such as cracking, alkylation, oxidation, halogenation, nitration and so on.

烷烃能够发生裂解反应 、 烷基化反应 、 氧化反应 、 卤代反应、消化反应等.

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.

Conclusions: The alkanes substituted phenolshigher antioxidant activity than that of electron-withdrawing groups substituted phenols.

结论: 烷烃基类取代物易于抗氧化,卤代烃基或硝基类取代物抗氧化活性差.

The alkanes are generally inert to ionic reagents.

烷烃一般说来对离子型试剂是不活泼的.

The aroma of persimmon fruit is weak, main components are alkanes and esters, such as tetradecane, 2-methyl-decane, hexadecane and ethyl decanoate.

柿子果实的香气较弱，主要以烷烃类和酯类为主，如十四烷、2-甲基癸烷、十六烷等烷烃类物质和癸酸乙酯。

Investigation on carbon preference index ( cpi) of n-alkanes in aerosol

气溶胶中正构烷烃的碳优先指数研究

Alkanes are resistant to attack by oxidizing agents generally.

烷烃一般对于氧化剂的作用是稳定的.

The gradation in the physical properties of the alkanes is typical of a homologous series.

烷烃物理性质的逐渐变化是同系列的特点.

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.

Other components are the homologous alkanes, ethane, propane, and higher hydrocarbons.

其他组分有同系烷 、 乙烷 、 丙烷和高分子碳氢化合物.

Catalytic Cracking of n-Alkanes and Coke Deposite under Supercritical Condition

超临界条件下正构烷烃催化裂解和积碳研究

Quantitative structure-activity relationship study of anti-knock index and boiling point of alkanes using artificial neural networks method

用人工神经网络方法研究烷烃结构与辛烷值、沸点的关系

Relationship between Connectivity Index and Acentric Factor of Alkanes

烷烃的偏心因子与连接性指数的关系

The general uses of alkanes may be divided into three categories.

烷的一般用途可分为三个方面.

This paper, using the number N of carbon atoms and Wiener index W, P as structural parameters, established a quantitative relationship formula between boiling points and its molecular structure of alkane isomers. The boiling points of 76 branched chain alkanes were calculated.

以碳原子数N和Wiener指数W，P为结构参数，建立了烷烃同分异构体的沸点与其分子结构间的定量关系式，用此式计算了76个支链烷烃的沸点。

The δ D values of the n-alkanes from Xifeng loess profile spanning the last 130 kyr show large variations for the past 130 kyr, ranging from-140 ‰ to-190 ‰. The Study on Relationship between the Distribution of N-alkanes, Pristane and Environment Change in JinChuan Peatland

黄土高原西峰黄土/古土壤剖面过去130kyr正构烷烃组分的平均氢同位素组成变化为-140‰～-190‰。金川泥炭地正烷烃和姥鲛烷分布特征与环境演变关系研究

Judged from the abundance of organic matter, the gas chromatograms of n-alkanes, the interrelation of terpanes and the correlation of oil/ oil, the source beds are considered mainly to be argillaceous rocks interbedded with carbonatites.

从生油岩的有机质丰度、烷烃色谱特征和萜烷相关性等和原油对比结果表明，源岩主要为与碳酸盐岩呈互层的泥质岩。