Conclusion: Volatile components of apple seed are organic acid, olefins, alkane, aldehyde, ketone, phenol.

Esters are the major components , the other chemical constituents were alkane, acids, alcohol, aldehyde and ketone.

主要成分为酯类化合物,同时鉴定出烷烃类 、 酸 、 醇 、 醛、酮类化合物.

It'shows that alkane decomposes the least and the rate of deactivation is the slowest.

其中饱和烷烃分解率最小,催化剂失活速率最慢,为较佳的反应介质.

Given this understanding, the authors asked whether a sufficiently long alkane might be hydrophilic.

在此基础上, 论文作者问到,是否足够长的碳链会是亲水的.

Traditionally, it is considered hat wax is normal alkane with high molecular weight, and higher plant.

但近年来研究表明, 蜡除高分子量正构烷烃外, 还有异构烷烃和环烷烃,甚至有烯烃存在.

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.

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.

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.

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.

The alkanes are non-polar.

烷 是非 极性的.

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.

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.

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 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.

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.

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 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 general uses of alkanes may be divided into three categories.

烷的一般用途可分为三个方面.

Methane and propane are alkanes.

甲烷和丙烷是烷烃。

Thoracic myelopathy in a patient with alkaptonuria has not been previously reported.

之前尚无尿黑酸尿病人合并胸椎脊髓病的报道.

The results showed that there were abundant inorganic elements in physalis alkekengi L . var.

结果表明,锦灯笼含有丰富的对人体有益的无机元素,具较高的营养价值.