异构体

Indicate by an arrow the position most likely to react in each of the following three isomeric nitrotoluenes.

答：用箭头标出与硝基甲苯的三种同分异构体发生反应最有可能发生的位置并解释。

Any of three colorless, flammable isomeric hydrocarbons, C5H12, derived from petroleum and used as solvents.

戊烷有三种同分异构体的无色可燃烷烃，c5h12，从石油中提炼，可用做溶剂

However, R-verapamil,the isomeride of VPM is able to reversel MDR more effectively and safly, and has good perspective in clinical application.

从维拉帕米分离出的光学异构体R-型维拉帕米，在逆转肿瘤MDR时，更加高效安全，具有良好的临床应用前景。

Keywords modified ADA;consumption;efficiency;isomeride

改良ADA；消耗；效率；异构体

Both active components of plant herbs with an analogical isomeride structure were chosen as research targets. A combination of intrinsic fluorescence, UV-Vis, FTIR and the molecular modeling techniques has been used to characterize the binding between both flavones and human gammaglobulin.

将互为同分异构体的两种植物药活性组分山姜素和豆蔻明作为研究对象，应用荧光光谱法、紫外光谱法以及红外光谱法并结合分子对接技术首次对这两种黄酮类化合物与人-γ球蛋白(Human gammagobulin， HG)的相互作用进行了详细研究。

During intestinal ischemia/reperfusion in mice, anti-SDF-1 and anti-CXCR4, but not isotype control antibodies, abolish the recruitment of CD34+ cells in microcirculation.

在肠缺血/再灌注小鼠模型中，抗－SDF 1、抗－CXCR4减弱CD34+细胞在微循环中的募集，但对照抗体的异构体却无此作用。

The two livin isoforms are expressed in gastric cancer tissues. As molecula rmarker of gastric cancer, livin may be a new target of therapy for gastric cancer.

Livin的两异构体在胃癌组织中的表达使其可能成为胃癌的分子标记物或胃癌治疗的新靶点。

A process approaching 3 and 4 chlorophthalic anhydride in high purity via chloriation of o xylene , oxidation of monochloro o xylene by air in gas phase,and separation of 3 and 4 chlorophthalic anhydride afterwards by distillation is described.

介绍由邻二甲苯氯代，再经空气氧化及异构体分离合成氯代苯酐中试规模的合成路线。

O-MNT、 p-MNT and m-MNT are got by mononitrating toluene, and the quantity of p-MNT and m-MNT that are needed is increased greatly, there is a great economic benefit to improve their ratioes , so the objective of this study is to improve the ratioes of p-MNT and m-MNT in the mononitration of toluene respectively through changing temperature and mixed acid composition in industrial way.

甲苯一硝化生成邻硝基甲苯、对硝基甲苯、间硝基甲苯，其中对硝基甲苯和间硝基甲苯的用量明显增加，提高它们在产物中比例的研究，具有十分可观的经济价值，所以本文从工业化的角度出发，通过改变温度和硝硫混酸的组成，分别对提高一硝基甲苯中对、间位异构体的比例进行研究。

The optimum reaction conditions were: at present of acetic anhydride, a stoichiometric quantity of nitric acid, at room temperature for 40 minutes. Nitration of chlorobenzene gave a,50% yield of mononitro compounds, and an ortho-para isomer ratio 0.20 in product distribution of chlorobenzene mononitration.

结果表明：硅钨酸催化性能较好，催化剂载体以纳米二氧化硅最好，反应条件中醋酸酐用量是主要影响因素；SiW_(12)O_(40)~(4-)／纳米SiO_2催化剂具有强对位选择性：在醋酸酐存在下，氯苯与等当量的硝酸室温下反应40分钟，氯苯一硝化产物中邻／对硝基氯苯异构体的质量比达0.2，产率可达50％。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。