非旋波近似下三能级哈密顿量的两能级简化

讨论旋波近似和非旋波近似两种条件下三能级系统哈密顿量的两能级简化及相关物理效应。     

用实时全息术研究低速变化过程的一种简易系统

研制了一种用于研究物体低速过程的简易系统，它由带有液门原位化学处理的实时全息干涉装置和具有连拍功能的相机以及一台氦氮激光器组成，是一种简易实用的“低速、实时全息干涉摄影系统”。用它记录了火箭推进剂样品在室温，常压下的燃烧过程，１００瓦普通只灯逐级加压的点燃过程，对实时全息图的记录和处理采用了一种可获得高反衬度的新技术，拍摄的成功率高，干涉条纹的反衬度好，它为研究物体的低速变化过程提供了一种有力的手     

DNA分子的电子传输特性

从DNA分子导电性实验中得到了非线性的电流一电压关系．当偏压小于某一阈值时，电流很小；当偏压等于或大于某一阈值时，电流增加很快．本文用一个简化模型描述DNA分子的电导过程，计算出DNA分子电流与偏压的关系，能够很好地解释实验测量结果．     

碲镉汞表面钝化新方法

提出了脉冲式阳极氧化生长碲镉汞表面钝化膜的方法．自行设计研制成功一种新颖的脉冲式阳极氧化装置，获得了优于传统恒流方式生长的碲镉汞阳极氧化膜界面，并结合扫描电子显微镜、俄歇电子能谱和光电导衰退法观测了脉冲氧化对碲镉汞表面的影响．探索到一种能够使表面复合速度降得最低的最佳脉冲氧化条件．对脉冲氧化膜的生长机制进行了分析讨论 关键词：     

ERROR ESTIMATION OF SPECTRAL-DIFFERENCE METHOD FOR COMPRESSIBLE FLUID FLOW IN THREE-DIMENSIONAL SPACE

This paper is devoted to a combined Fourier spectral-finite difference method for solving 3-dimensional, semi-periodic compressible fluid flow problem. The error estimation, as well as the convergence rate, is presented.     

用分光光度法测定固相络合物的组成

以镍－丁二酮肟显色体系和钇－８－羟基喹啉显色体系为例，对萘相中络合物的测量原理和测定方法进行探讨，测得镍与丁二酮肟萘相络合物的组成比以及钇与８－羧基喹啉萘相络合物的组成比均为１：２。     

Fluorescence Quenching of Poly[2-methoxy-5-（2′-ethylhexoxy）-p-phenylene vinylene] （MEH-PPV） in Solutions

Fluorescence quenching processes of poly[2-methoxy-5-(2‘ethyl-hexoxy)-p-phenylene vinylene] (MEH-PPV) in solution by electron acceptors, O2 and acid, have been studied. Static quenching of the fluorescence from MEH-PPV by an electron acceptor (DDQ or TCNE) occurs due to electron transfer from MEH-PPV to the electron acceptor and this electron transfer quenching can be promoted by chloroform. Photooxidation takes place in the MEH-PPV solution and singlet oxygen is an intermediate in the photooxidation, according to the results of ESR spectroscopy. Acid also plays an important role in the fluorescence quenching process of MEH-PPV, by the protonation of the alkoxy groups in the molecular chain.     

亚氨基二乙酸树脂吸附钇(Ⅲ)的研究

The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y(Ⅲ) were investigated. The statically saturated adsorption capacity is 102mg·g^-1 resin at 298K in HAc-NaAc medium at pH 5.7. Y(Ⅲ) adsorbed on IDAAR can be reductively eluted by 1.0～4.0mol·L^-1 HCl used as eluant and the elution percentages are almost as high as 100%. The resin can be regenerated and reused without apparent decrease in adsorption capacity. The apparent adsorption rate constant is k₂₉₈=3.36×10^-5s^-1. The adsorption behavior of IDAAR for Y(Ⅲ) conforms to Freundlich′s model reasonably. The thermodynamic adsorption parameter, enthalpy change ΔH of IDAAR for Y(Ⅲ) is 18.6kJ·mol^-1. The complex molar ratio of the functional group of IDAAR to Y(Ⅲ) is about 3∶1. The adsorption mechanism of IDAAR for Y(Ⅲ) was examined by using chemical method and IR spectrometry.     

氧掺杂形成的T‘—R2CuO4（R=Nd,Sm,Eu）化合物中的铁磁性团簇

本文报道了一个由氧掺杂产生的Ｔ’相Ｒ２ＣｕＯ４系列化合物中位于２８Ｋ附近的公有的磁反常规象。