乙烯的

Boiler feed pump is one of the most important device of the ethylene equipment.

锅炉给水泵是乙烯装置的重点设备之一，随着市场的不断发展，各乙烯厂都在增容改造，原有的设备能力已不能满足生产需求。

The effect of low-level doses of gamma radiation on the properties of the poly-vinylidene fluoride hollow fiber membrane was studied.

研究了较低剂量的γ辐射对聚偏氟乙烯中空纤维膜的结构与性能的影响。

Surface modified nano-sized mgnesium hydroxide was prepared by direct precipitation method with magnesium nitrate hexahydrate and sodium hydroxide as raw materials,and sodium fatty alcohol polyoxyethylene ether carboxylate as modifying agent.The optimum dosage of modifying agent was 0.2% of the mass of magnesium hydroxide,which was confirmed by sediment volume experiment.Modified and unmodified samples were characterized by fourier transform infrared spectroscopy,X-ray diffraction,transmission electron microscope,and tap density test.

以六水硝酸镁、氢氧化钠为原料，脂肪醇聚氧乙烯醚羧酸钠为改性剂，采用直接沉淀法一步合成改性纳米氢氧化镁，用沉降体积实验确定改性剂的最佳用量为氢氧化镁质量的0.2%，通过红外光谱、X射线衍射、透射电镜、表观密度对改性前后的样品进行表征。

The stability and hygroscopicity of the electrolyte film and its conductivity changing with its constitution and temperature have been studied in the paper.

本文采用聚乙二醇和环氧树脂／三乙烯四胺凝胶组成互穿聚合物网络，制备了IPN——ZnCl2高分子固体电解质膜，讨论了IPN的成因和电解质膜的电导率随组成、温度的变化及其膜稳定性和吸水性。

This suggested that the H(superscript +) for initiating the reaction was supplied partly by the 2-H of imidazole.

通过对反应后液体产物的GC-MS分析，提出了离子液体催化的苯与乙烯烷基化反应的正碳离子机理。

The result in either event is that the transformed plants are incapable of synthesizing ethylene, though other aspects of their metabolism are not affected.

每一事件的结果均是被转化植物不能合成乙烯，尽管未影响到这些植物的代谢的其它方面。

1Nm. The content of this intermediate fraction was found to increase with increasing λ.

对POE体系的研究结果表明，高弹性的POE不但存在结晶，且结晶中单斜晶含量明显高于其它的乙烯共聚物。

This dissertation was designed to study heteto-phase grafting polymerization of vinyl acetate , maleic anhydride and VAC/MAH binary monomer system, irrespectively, with low density polyethylene film as substrate and benzophenone as photoinitiator. The purpose is to develop new and more effective methods to modify the surface and buck properties of polyolefines by studying the grafting mechanism of the system and exploring the characteristics of the grafting process.

本文主要以低密度聚乙烯膜为基体膜，以二苯甲酮为光引发剂，分别对醋酸乙烯酯、马来酸酐以及VAC/MAH的非均相接枝聚合反应进行了系统研究，以探讨相关的接枝反应机理、接枝反应过程以及接枝工艺的可行性，目的在于建立聚烯烃材料本体和表面改性新方法。

It is important theoretically and practically that the ketene photodissociationas a model system for unimolecular dissociation.

乙烯酮分子的光解反应作为研究单分子解离的模型系统具有重要的理论和实际意义。

Photodissociation dynamics of ketene at 218 nm has been investigated using the velocity map ion-imaging method.

用离子速度成像方法研究了乙烯酮分子在218 nm光解下的光解动力学，得到了光解产物CO的共振多光子电离谱，以及在不同振转态的角分布和平动能分布。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。