Application of surface plasmon resonance in screening adsorbents and explaining adsorption phenomena using model polymers

A surface plasmon resonance (SPR) technique was developed as an online screening method to identify effective adsorbents for the peptide NH₂-Cys-Thr-Trp-Trp-COOH (CW-4). To validate the SPR technique, several linear polymers containing amino acid residues were synthesized as models of their corresponding adsorbents. SPR screening of all the linear polymers demonstrated that the linear polymer containing phenylalanine residues (PPhe) exhibited the highest affinity for CW-4 among the polymers tested. In accordance with the screening results from SPR, the adsorbent containing phenylalanine (APhe) exhibited the highest adsorption capacity for CW-4. An interesting observation was that the amounts of CW-4 adsorbed on 3 adsorbents were quite small, even though both SPR and isothermal titration calorimetry (ITC) experiments indicated the presence of interactions between CW-4 and the three polymers. A kinetic analysis performed using SPR technology suggested such a phenomenon was ascribed to the poor stability of the CW-4/polymer complexes; that is, CW-4 associates with the polymers quickly, but it also dissociated quickly. The combined results suggested that SPR was a promising tool to identify the optimal adsorbent for peptides, analyze the interactions contributing to adsorption and explain adsorption phenomena using polymer models.     

激光诱变生物效应机理探讨

提出在激光生物工程中应如何预选激光参数,并对激光诱变生物效应的机理进行了探讨.     

四苯基卟啉二酸H4TPP^2＋的共振Raman光谱研究

本文研究了四苯基卟啉二酸H_4TPP~(2 )在固体和溶液状态下的共振Raman光谱。并结合红外光谱指出H_4TPP~(2 )分子可能存在对称中心。退偏振比测量发现H_4TPP~(2 )有两个反常退偏带。H_4TPP~(2 )分子近似具有D_(14)对称性。     

液压系统中单向阀结构的振动分析

液压系统中单向阀结构的动力学模型是一个带有阻尼项和激励项的Mathicu方程。本文用非线性振动理论中的平均法对它进行了分析,指出它存在有主共振和二倍超谐波共振,分析了它们的稳定性,为液压系统设计和元件设计提供了选取有关参数的一些参考原则。     

谱学找金矿的新方法

本文重点介绍了电子顺磁共振谱、拉曼光谱、穆斯鲍尔谱、红外光谱、热发光光谱,对石英、黄铁矿、毒砂的含金与不含金的谱学特征进行了分析,从而为寻找金矿床和评价金矿床提供了信息。     

双筒流变仪中流体与内筒的惯性效应

当双筒流变仪的外筒以较高频率振摆时，即使被测的是牛顿流体，连接于内筒的扭丝所测出的力矩仍有相位滞后（“水的弹性分量困惑”），其原因是流体和内筒都有惯性。本文采用作者以前提出的化为常微分方程两点边值问题的新算法，对于流体与内筒的惯性效应做了详细的讨论。文中指出，只要设法减小内筒转动惯量和提高扭丝刚度，或者增大对内筒的空气阻尼，就可以避免在工作频率范围内发生共振现象。这时，可以不考虑内筒振摆而假设内筒静止，只考虑流体自身的惯性而使问题简化。     

受激Raman散射（SRS）的研究Ⅱ．SRS的强度增长规律

利用克雷末斯－海森堡包散公式，求出受激情况下的Ｒａｍａｎ强度增长规律．从理论上和实验上讨论了Ｒａｍａｎ池长对Ｒａｍａｎ强度增长的影响．并对散射强度的饱和、Ｒａｍａｎ激光原理等进行了较详细地讨论．     

复杂电力系统次同步谐振的选择模式分析法

文章首次提出了分析电力系统次同步谐振的选择模式分析方法，与全特征值分析法相比，该方法大大降低了计算量及内存需求，从而解决了考虑机组轴系间相互影响时多机系统次同步谐振分析问题。