异构的

Using GC/C/MS on-line carbon isotope analysis technique, we obtained the stable carbon isotope ratios of n-alkanes, iso-alkanes from the light hydrocarbon compositions and pristane, phytane in crude oils in Tarim basin.

本文利用新兴的原油单体烃类在线同位素分析技术测定了塔里木盆地原油及凝析油的正构烷烃、轻烃部分的异构烷烃和植烷、姥鲛烷的稳定碳同位素值。

In stereoisomerism, substances with the same atom s are bonded in the same ways but differ in their three-dimensional configurations.

第二种类型是立体同分异构体，具有相同原子的物质以相同的键合方式结合，但它们的三维构型不同。

For Mn5 cluster, the most stable structure is trigonal bipyramid with spin magnetism of 3 μ, and Mn6 cluster has the most stable structure of ferromagnetic octahedron with spin magnetic moment of 16μ.

Mn6的最稳定构型为铁磁性的畸变八面体（磁矩为16，C(下标 4v)）。各种异构体虽然多重度不同，但每个原子的自旋极化度均在3以上。

The catalytic isomerization of isoborneol in the presence or Zn laden or Cu laden catalysts,in liquid phase or gas phase,is reported.

研究异龙脑在常压下被含锌或含铜催化剂催化的液相和气相异构化反应，讨论了反应条件对产物分布的影

Methyl-5-ethyl-2-thiouracil,m.p.211°,was prepared according to the direc- tions of Johnson and Baily.4-Methyl-5-ethyl-uracil,m.p.236°,was formed in a 81% yield from 4-methyl-5-ethyl-2-thiouracil by boiling the latter with an aqueous solution of monochloroacetic acid.4-Methyl-5-ethyl-uracil reacted with phosphorous oxychloride and phosphorous pentachloride,giving 4-methyl-5-ethyl-2,6-dichloropy- rimidine in a 79% yield.

14-甲基5-乙基-2，6-二氯代嘧啶曾用磷醯氯和五氯化磷与其相应的2，6-二羟基嘧啶作用制取。(2)4-甲基-5-乙基-2，6-二氯代嘧啶与醇钠作用，极易转变成4-甲基-5-乙基-2，6-二烷氧基嘧啶。(3)4-甲基-5-乙基-2，6-二甲氧基嘧啶和2-氧代-3，4-二甲基-5-乙基-6-甲氧基嘧啶在高温时重排成其稳定构型的的异构体：1，3，4-三甲基-5-乙基-2，6-二氧代嘧啶。

Meanwhile, small amounts of other unsaturated molecules such as pimaric/isopimaric-type resin acids can also be hydrogenated.

发现在二氢海松酸/异海松酸型树脂酸的分子间存在因双键移位而引起的异构现象。

The application markets of three kinds of isoolefines(isoprene, cyclopentadiene ,piperylene) from the cracking C5 fractions and their downstream derivatives were reviewed.

着重评述了裂解C5馏分资源中3种异构烯烃(异戊二烯、环戊二烯和间戊二烯)及其下游衍生物的应用市场，并剖析了我国裂解C5资源的利用现状及应用前景。

Mass spectrometry results revealed that the pair of eluents respresented a pair of ternary copper complexes with mixed ligands, providing the first experimental evidence. These complexes are diastereoisomer in nature. The optimized configuration of the diastereoisomer was predicted by theoretical calculation.

质谱实验结果表明，拆分组分是一对铜混合配体复合物离子，其中的一个配体是提供手性环境的流动相添加物，另一配体是待拆分物质的某一构型对映体，这对铜混合配体复合物离子本质上属于非对映异构体。

The opening reaction of epoxide 17 by nucleobases was achieved regioselectvely to give designed isonucleosides in reasonable yield.

通过环氧化合物17的碱基开环反应，区域选择性地合成了设计的异核苷并利用制备HPLC分离了区域异构体。

Alternatively, we discuss the conformational retainment of enzyme in the gel and theinteraction between enzyme and gel, as well as a long range allosteric effect of the proteinresulting from the redox process of heme in the cytochrome c oxidase.

此外，对酶在凝胶中的构象保持及其相互作用，酶中血红素的氧化还原产生的长程蛋白异构效应等也给予具体地评述。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。