剪切与吸附对弱凝胶深部调驱作用的影响

分别用玻璃微珠、石英砂、露头砂制作填砂模型，研究了弱凝胶体系的动态性能变化以及剪切与吸附对其深部调驱作用的影响。研究结果表明，动态条件下弱凝胶体系在3种介质中均可发生交联反应，其封堵能力、有效作用距离、深部调驱作用在玻璃模型、石英模型、露头模型中依次降低，水驱后弱凝胶均呈颗粒状。剪切作用可破坏弱凝胶三维结构及聚合物分子链，延长动态成胶时间，降低弱凝胶的封堵强度及其深部调驱作用；吸附作用可富集交联剂，加快交联速度，缩短动态成胶时间，降低弱凝胶本身强度、可运移性及其深部调驱作用。     

压电石英晶体在有机液体—水混合体系中的特性

用晶体振荡器研究了压电石英晶体在一系列有机液体与水混合体系中的振荡性能,确定:在此类体系中的晶体频移与纯有机液体或电解质水溶液中的晶体频移变化规律不一致,系与液体的密度、粘度及介电常数有关,符合下一通式:△F=c_1d~(1/2)+c_2η~(1/2)-c_3ε_0+c_0,但电导率无显著影响.检测池外壁接地可显著降低介电常数的影响并提高频率稳定性.温度对频移的影响与体系的含水量有关.     

测定石英玻璃的导热系数

用单向稳定热流法测定纯度为99.95%的石英玻璃的导热系数，其温度范围的50－500℃，准确度估计到5％，发现石英玻璃的导热系数随温度升高而有所增大。     

微石英音叉陀螺激励与检测电极的研究

根据弹性力学和静电理论建立压电梁弯曲振动时晶体内电场分布的泊松方程,研究微石英音叉陀螺不同形式的激励与检测电极的性能,对泊松方程求解,得出了几种典型电极形式下压电梁内电场的分布表达式,计算驱动电极的等效体力和检测电极的压电电流。根据等效体力和压电电流的大小确定出了最佳驱动电极和检测电极的形式,给出了微石英音叉陀螺电极性能的研究方法。     

内蒙古乌拉特前旗脑包沟—北召沟金矿床特征及其成因

通过区域地质背景、构造格局、构造递变序列、矿床地质特征及成因研究，论述了脑包沟-北召沟石英钾长石蚀变脉型金矿床的多源复成热液成因，并对研究区找矿前景进行了探讨。     

YDXL-Ⅲ87A压电晶体三向小力值传感器的研究

从机理，晶体切割，力电转换，结构优化，晶组构成，组序排列，装架技术，预 载原理，标定与使用等一系列理论与实际问题上，全面阐述了三向小力值传感器的原 理与研制的关键，给出了计算公式，并对实际使用过程中出现的一些问题给出解决办 法。     

改善石英晶体双折射滤波器次极大的优化设计

针对双折射滤波器中器件损耗的情况,同时为了改善滤波光谱的次极大,设计了一种新型滤波器,并从原理上作了分析,此新型滤波器与原有多级滤波器相比,主要的改进在于减少了所用偏光镜的数目,从而提高了出射光的透过率.以Schoolman型石英晶体双折射滤波器为例,将此新型滤波器与原有结构进行了比较,从理论上分析了在考虑各器件损耗的情况下的滤波特性,结果表明,此滤波器具有减少出射光损耗的显著效果.     

Formation of Intermediate Layers for Immobilization of Biomacromolecules by Self‐Assembling and Reduction of Phenyldiazonium Salts. A Comparative Study

Two types of biomolecules were tested in the comparison of usefulness of two ways of formation of the intermediate layers at electrodes: a 20‐nucleotide DNA sequence and glucose oxidase. Chronocoulometric, amperometric, electrochemical impedance and PM‐IRRAS experiments proved that the layers obtained by electroreduction of diazonium salts are much more stable and more efficient in the accumulation of biomolecules compared to layers obtained by self‐assembling of appropriate thiols.     

Salt‐Induced Depression of Lower Critical Solution Temperature in a Surface‐Grafted Neutral Thermoresponsive Polymer

Summary: Quartz crystal microbalance with dissipation monitoring (QCM‐D) is employed to determine the effect of salt on the volume phase transition of thermoresponsive polymer brushes. Changes in mass and viscoelasticity of poly(N‐isopropylacrylamide) (PNIPAM) layers grafted from a QCM‐D crystal are measured as a function of temperature, upon contact with aqueous solutions of varying salt concentrations. The phase‐transition temperature of PNIPAM brushes, T_C,graft, quantified from the QCM‐D measurements is found to decrease as the concentration of salt is increased. This phenomenon is explained by the tendency of salt ions to affect the structure of water molecules (Hofmeister effect). However, in contrast to the linear decrease in phase‐transition temperature upon increasing salt concentration observed for free PNIPAM, the trend in T_C,graft for PNIPAM brushes is distinctively non‐linear.

Schematic representation of the effect of salt concentration on the phase transition behavior of thermoresponsive polymer brushes.