甲烷

The catalytic performance of MDA on a Mo/HZSM-5 catalyst derived from the HZSM-5 zeolite prepared from soluble glass is better than that derived from the HZSM-5 zeolite prepared from silicon gel.

由水玻璃合成的HZSM-5分子筛制得的Mo基催化剂，其甲烷无氧芳构化性能优于由硅溶胶合成的HZSM-5分子筛制得的Mo基催化剂。

Objective To observe effect of selenium on the protein P16 expression in the testicle spermatogonium of rat borne with colon cancer induced by azoxymethane.

目的观察硒对氧化偶氮甲烷所致结肠癌大鼠睾丸精原细胞P16蛋白表达的影响。

Keywords Selenium;Azoxymethane;Spermatogonium;Protein p16;Colon cancer;Rats

硒； 氧化偶氮甲烷；精原细胞； P16蛋白；结肠癌；大鼠

Based on the conversation equations for hydrodynamics and chemical reaction dynamics, by adopting the k-e turbulent model and the EBU-Arrhenius combustion model, the SIMPLE algorithm was used to investigate numerically the methane-air premixed gas vented explosion process in the two-dimensional space of the spherical vessel with a conduit for explosion venting.

为了得到球形容器内可燃气体的泄爆强度产生机理以及燃烧火焰与压力传播的基本规律，从流体力学和化学反应动力学守恒出发，采用κ-ε湍流模型和EBU-Arrhenius燃烧模型，利用SIMPLE算法对带泄爆导管的球形容器二维空间内甲烷－空气预混气体的泄爆过程内外场进行了数值计算，获得了气体燃烧过程中火焰和压力传播特性以及气体流动特性，能够比较清晰地反映泄爆的整个过程。

As for CH Spurgeon's sermon 'Particular Redemption', the same doubtful exegesis emerges.

至於甲烷贞的讲道'特别救赎'，同样的疑问出现注释。

Effect of stoichiometric ratioof organic fuel to oxidizer on structures and catalytic activities of the catalysts were studied.

以D，L-丙氨酸为有机燃料，采用溶液燃烧法制备了钙钛矿型复合氧化物La0.8Sr0.2CoO3催化剂，研究了有机燃料与氧化剂的化学计量比对催化剂结构和性能的影响，考察了催化剂的甲烷燃烧活性，并对催化剂进行了表征。

Using this strict solution, the reaction flow of nitromethane pyrolysis under the shock tube experiment conditions is simulated, the numerical results are found to be in excellent agreement with the experimental data.

对硝基甲烷激波管热解进行了模拟，并把耦合算法得到的模拟结果和激波管实验数据进行了对比验证，两者符合较好。

Rats in the positive control group were subcutaneously injected with azoxymethane once a week in the second and third weeks.

阳性对照组大鼠从实验第2周开始腹腔注射氧化偶氮甲烷，每周1次，连续2周。

It is obvious from the relativerate constants that the electronic property of the substituent markedly affects the insertionreaction.

对〓，选用苯和二氯甲烷，研究了溶剂效应的影响。

The products include two series: Sulfa drugs Industrial Sulfanilamide, Crystel Sulfanilamide, Sulfaguanidine, Sulfadimidine(Sodium, Sulfadiazine, Sulfathiazole Sodium, Sulfaquinoxaline Sodium, Sulfameter Dimethyl Sulfate, Nitromethane, Hydroxylamine Hcl.

本公司专业生产化工、医药中间体，产品主要包括磺胺（工业磺胺、结晶磺胺、磺胺脒、磺胺二甲嘧啶、磺胺嘧啶、磺胺噻唑钠、磺胺喹噁啉钠、磺胺五甲氧嘧啶）及硫酸二甲酯（硫酸二甲酯、硝基甲烷、烟酸羟胺）两大系列。

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。