链烷烃

The selectivity of light isoparaffin was improved obviously, but with the increase of the olefin's selectivity.

在合成产物中，短链异构烷烃的选择性被显著提高，同时也伴随烯烃产物选择性的提升。

There are few literatures reporting the photodissociation of these compounds at their A-band.

事实上，具有C_s对称的有C-C长链的溴代烷烃分子更接近一般的多原子分子，其光解研究有十分重要的理论和实际意义。

In fact, the behavior of alkyl bromides with a long C-C chain, which belong to Cs symmetry, is more similar to that of general polyatomic molecules.

这里，我们分别采用共振增强多光子电离方法、离子速度影象技术从不同的侧面研究了具有C-C长链和Cs对称性的溴代烷烃分子的光解动力学问题。

Homogeneous catalytic oxidations of organic substrates such as alkane and alkene catalyzed by m-oxo-bismetalloporphyrins and flexible alkoxyl oxygen linked-bismetalloporphyrins were introduced,and the catalytic mechanism of these two bismetalloporphyrins,along with the possible synergetic catalysis mechanism of binuclear central metal were discussed.

主要介绍了μ-氧代双核金属卟啉和以柔韧烷氧链相连的双核金属卟啉作为仿酶催化剂在均相催化烷烃、烯烃等有机底物氧化方面的研究进展，并对这两类双核金属卟啉的催化机理、金属双核的协同催化作用机理作了论述，最后展望了双核金属卟啉仿酶催化剂的研究前景。

Synthesis and liquid crystalline behavior of three recently reported mesogenic block-molecules,namely polyhydroxy 1-benzoylaminopropane-2,3-diols Ⅰ,star-shaped pentaerythritol tetrabenzoates Ⅱ and calamitic bolaamphiphiles with lateral chains Ⅲ which are constituted of anisometric block,amphiphilic block and alkyl or perfluorinated chains with different topologies are reviewed in this article.

这些分子由各向异性嵌段、两亲性嵌段和烷基链以不同的拓扑形式组合而成，其合成的关键步骤是Pd(0)催化下碘代全氟烷烃对双键的自由基加成反应以及Pd(0)催化的偶合反应。

In comparison with the methyl bromides, the photodissociation dynamics of alkyl bromides with a long C-C chain has not been studied in detail.

相对而言，关于长链的溴代烷烃分子在第一吸收带光解的研究报道就很少。

According to the results of the cold filter plugging point test, these flow improvers impro...

当流动改进剂侧链的碳数与油样正构烷烃中碳数分布相匹配时，或者含有极性集团时能达到较好的降滤效果。

Alkylbenzene, normal alkanes and alkylcyclohexane on the pyrolysates of P. Boryanum at 300℃ had uniform distribution and the relative content of them was similar, indicating that they originated from same precursors. Fatty acids, alcohol and ketone in algal cell are the possible precursors. For example, the precursor of relatively abundant C〓 alkylbenzene and alkylbenzene with C〓 side chain perhaps related with palmitic acid. N-alkylnaphthalene in pyrolysates at 300℃ probably derived from alkylation of cleavage products of aromatic steranes and terpanes.

在盘星藻300℃热解产物中，烷基苯、正烷烃和烷基环己烷碳数分布一致、各化合物的相对含量接近，表明它们有相同的来源，藻类体内的脂肪酸、醇和酮及细胞壁等物质可能是其母质，相对含量较高的碳数为16及侧链碳数为16的烷基苯类化合物，其前身物可能与软脂酸有关。300℃热解产物中的正烷基萘类化合物，可能由芳香甾、萜类的降解产物与直链烃类加成烷基化而形成。

This paper describes two-step enrichment and double-time replica plating technology to select mutants with enhanced α,ω-oxidation and blocked β-oxidation. After C.

为提高热带假丝酵母转化烷烃生产长链二元酸的能力，建立了通过两步浓缩和双重影印技术筛选获得α、ω-氧化增强、β-氧化减弱的热带假丝酵母诱变菌株的筛选体系。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。