Studies on the Electrochemical Characteristics of K2FeO4 Electrode

Discharge performance of K2FeO4 electrode under different conditions was studied by the constant electric current discharge method. The electrochemical characteristics of K2FeO4 electrode were investigated for the first time by means of cyclic voltammetry. The results show that the K2FeO4 electrode made at moderate pressure (20MPa) and discharged at lower current has better discharge performance. It is also found that K2FeO4 electrode is significantly rechargeable.     

基于磷酸铁锂的锂离子动力电池性能

磷酸铁锂（LiFePO4）因其无毒、对环境友好、原材料来源丰富、比容量高、循环性能好、安全性能优异等特点已被公认为突破正极材料制约的新一代安全低成本高容量大功率型动力或储能锂离子电池首选正极材料，已成为我国及世界主要发达国家锂离子动力电池的重点发展方向。     

富勒烯C60、C70的超分子化学

介绍了富勒烯Ｃ６０、Ｃ７０与环糊精、冠醚、杯芳烃等主体形成超分子的进展和一些潜在的应用前景。     

富勒烯化聚环氧丙基咔唑的合成与表征

通过Ｆｒｉｅｄｅｌ－Ｃｒｒａｆｔｓ反应制备了富勒烯化的聚环氧丙基咔唑，聚合物中Ｃ６０的含量最高可达７．６ｗｔ％。通过凝胶渗透色谱法测定了聚合物分子量，并采用＾上Ｈ和＾１３Ｃ－ＮＭＲ，ＩＲ，热分析及光谱等手段对其结构进行了分析与表征。     

Aluminum Lon Removal from Monoaluminum Ovotransferrin by Pyrophosphate

The rates at which aluminum was removed from the N- and C-terminal monoaluminum ovotransferrins by pyrophosphate were evaluated by UV difference spectra in 0.01 mol/L Hepes, pH=7.4 and at 37℃. Pesudo first-order rate constants as a function of pyrophosphate concentration were measured. The results indicate that the pathways of aluminum removal are different. For the N-terminal binding site, aluminum removal follows simple saturation kinetics, while the removal of aluminum from the C-terminal binding site reverts to the combination of saturation and first-order kinetics. The saturation component is consistent with a rate-limiting conformational change in the protein as has been reported. We propose that the first-order kinetics mechanism is attributed to a pre-equilibrium process. The rate constants of saturation kinetics are accelerated from both terminals with the addition of 0.1 mol/L chloride to the monoaluminum ovotransferrin solutions, whereas the rates of the first-order kinetics are decreased for the C-terminal binding site. The effect of chloride ionic strength causes a continuing increase on kobs for the N- and C-terminal binding sites. Moreover, the kinetics behavior of the N-terminal is more easily affected by chloride than that of the C-terminal. In the experiment presumably the N-terminal site is apparently kinetically more labile than the C-terminal site.     

足球烯——新发现的一种单质碳分子

由60个碳原子组成的一种碳分子已在实验中发现.它是石墨和金刚石的同素异形体,但具有一个确定的组成.在这种C_(60)的分子中,60个碳原子构成像足球一样的32面体,碳原子处于该多面体的顶点,因此称之为“足球烯”.足球烯的量子化学研究结果,特殊的物理性质,和应用前景,已开始引起重视.     

山西五台山地区早元古代白云岩碳同位素演化及意义

本文首次较系统地研究了早元古代白云岩的碳同位素组成。样品采自山西五台山地区滹沱群。平均采样间距8m,分析的样品总数484个。碳同位素结果表明:早元古代白云岩δ~(13)C值随时间有明显的变化,但又具有相对的稳定。与显生宙中白垩—第三系、二叠—三叠系等界线上碳酸盐岩碳同位素突变类似,在早元古代中也有碳同位素的快速变化。     

壳聚糖修饰玻碳电极卷积伏安法测定环境水中的EDTA

制备了壳聚糖修饰玻碳电极 ,研究了Fe(EDTA) -在修饰电极上的吸附还原行为 ,用卷积伏安法通过Fe(EDTA) -的检测测定了环境水中的EDTA。在优化的实验条件下 ,峰电流值与 8.0× 1 0 -7～ 5 .0× 1 0 -6mol L的EDTA呈线性关系 ,回归方程为epp′ =0 .75 2 5c - 0 .661 3,r =0 .991 ,最低检出限为 5 .0× 1 0 -7mol L ,5次测定的相对标准偏差小于 5 .8%。对实际样品测定的回收率为98 1 %～ 1 0 5 % ,对比HPLC的结果 ,相对偏差小于 5 %。     

用铜(Ⅱ)-过氧化氢-二苯碳酰二肼/氯仿体系催化-萃取光度法测定铜

本文研究了在弱酸性介质中，利用铜（Ⅱ）催化过氧化氢氧化二苯碳酸二肼生成二苯卡巴腙的指示反应与铜（Ⅱ）和二苯卡巴腙的显色反应相结合，建立了催化-萃取光度法测定铜的新方法。方法的线性范围为5．0～500μg／L，表观摩尔吸光系数为8．8×104L·mol－1·cm-1。用于水、铝合金和岩石中铜的测定。结果满意。     

表面活性剂在低能固体表面上的吸附 Ⅲ: 聚苯乙烯胶乳粒子对阴离子表面活性剂的吸附

在无乳化剂的条件下合成了粒径均匀的聚苯乙烯胶乳.发展了应用表面张力计测定吸附等温线的连续平衡法,得到不同盐浓度和温度下聚苯乙烯胶乳对十二烷基硫酸钠和十二烷基苯磺酸钠的吸附等温线.它们属于Giles分类的L_2型或L_4型,采用两阶段吸附模式讨论了吸附机理、吸附层结构及等温线类型变化的规律。