LaNi4Fe催化合成氨反应性能的研究

用冶金法、还原扩散法、共沉淀法制得了LaNiFe,并对其催化合成氨反应性能进行了研究。实验结果表明:还原扩散法,共沉淀法制得的LaNi_4Fe催化活性均比冶金法好。X—射线分析指出LaNi_4Fe在合成氨反应过程中变为Ni_4Fe和LaN。     

Spectroscopic characterization of effective components anthraquinones in Chinese medicinal herbs binding with serum albumins

The interactions of serum albumins such as human serum albumin (HSA) and bovine serum albumin (BSA) with emodin, rhein, aloe-emodin and aloin were assessed employing fluorescence quenching and absorption spectroscopic techniques. The results obtained revealed that there are relatively strong binding affinity for the four anthraquinones with HSA and BSA and the binding constants for the interactions of anthraquinones with HSA or BSA at 20 degrees C were obtained. Anthraquinone-albumin interactions were studied at different temperatures and in the presence of some metal ions. And the competition binding of anthraquinones with serum albumins was also discussed. The Stern-Volmer curves suggested that the quenching occurring in the reactions was the static quenching process. The binding distances and transfer efficiencies for each binding reactions were calculated according to the F?ster theory of non-radiation energy transfer. Using thermodynamic equations, the main action forces of these reactions were also obtained. The reasons of the different binding affinities for different anthraquinone-albumin reactions were probed from the point of view of molecular structures.     

An Oscillation Condition for an Electrode－separated Piezoelectric Sensor in Non－electrolyte Liquid

ＡｎＯｓｃｉｌｌａｔｉｏｎＣｏｎｄｉｔｉｏｎｆｏｒａｎＥｌｅｃｔｒｏｄｅ－ｓｅｐａｒａｔｅｄＰｉｅｚｏｅｌｅｃｔｒｉｃＳｅｎｓｏｒｉｎＮｏｎ－ｅｌｅｃｔｒｏｌｙｔｅＬｉｑｕｉｄＳＨＥＮＤａ－ｚｈｏｎｇ，ＨＵＡＮＧＭｉｎｇ－ｓｈａｎ，ＬＩＮＳｏｎｇ，Ｎ...     

磁性交联壳聚糖对稀土金属离子的吸附性能

用高胶乙酰度的壳聚糖包埋自制的磁流体，并用戊二醛交联制成磁性壳聚糖（MCG），考察了其对稀土离子La^3 ,Nd^3 ,Eu^3 ,Lu^3 的吸附性能。探讨了溶液的酸度，体系温度，初始离子浓度对MCG吸附性能的影响；发现MCG对稀土离子的吸经纯高脱乙酰度的壳聚糖强，最高吸附率可达到99％以上，并具有良好的重复使用性；其吸附行为满足Langmuir等温式。     

氧极谱催化波法测定二苯胺

本文报道一种极谱测定二苯胺的新方法,它是基于二苯胺引起的氧极谱催化波.这个氧极谱催化波是由于二苯胺催化了电生超氧离子O_2~(-)的歧化反应产生的.本方法简单方便,有良好选择性.应用本方法测定了化工原料二苯胺的含量,结果令人满意.     

氰根桥连的异金属配位聚合物{[Ni(pn)2][Fe(CN)4(bipy)]}2·3H2O(pn=1,3-丙二胺,bipy=2,2′-联吡啶)的合成与结构

以[Fe(CN)₄(bipy)]^2-为建筑块和[Ni(pn)₂]²⁺在水溶液中反应,合成了{[Ni(pn)₂][Fe(CN)₄(bipy)]}₂·3H₂O(pn=1,3-丙二胺)。通过X-射线单晶衍射确定了其晶体结构。该配合物属单斜晶系,P2₁/n空间群,晶胞参数为:a     

铝钛合金溴化物对直链烷烃异构化反应的催化作用

首次研究了铝铁合金溴化物的合成及其对直链烷烃异构化反应的催化作用,讨论了正戊烷的异构化反应,得到其动力学方程为1nC/C_0=-0.50t,表观活化能为26.3 kJ/moJ,测定了正己烷、正庚烷、正辛烷在不同溶剂中、不同温度下催化异构化反应的动力学曲线,为铝铁合金溴化物的工业应用提供了理论依据。     

基于企业微信平台和在线教育综合平台的线上教学实践

In order to achieve "postponement of school without suspension of learning" during the prevention and control of new coronavirus pneumonia, the online teaching strategy was constructed based on Enterprise WeChat and Integrated Online Education Platform for the online teaching of Separation Science and Technology. The student-centered teaching methods were applied in online teaching process.     

SMSI effect on ceria supported Cu-Pd catalysts in the hydrogenation of 1,3-butadiene

Ceria-supported copper-palladium catalysts have been tested in the hydrogenation of 1,3-butadiene. The SMSI behavior of the bimetallic catalysts depended on the temperature of reduction. They were analyzed by H₂ chemisorption and XPS.