4，4＇－二苯醚二甲酸改性PET的合成与表征

４，４＇－二苯醚二甲酸（ＯＢＢＡ）是一种重要的液晶聚合物单体。以此作为改性组分，合成了一系列ＰＥＴ共聚酯，并用１Ｈ－ＮＭＲ、ＦＴ－ＩＲ、ＧＰＣ、二甘醇和端羧基测定等方法进行了表征，同时对改性单体的转化率和合成共聚酯的反应速率进行了测定，结果表明，所选择的合成方法可以获得较高的转化率；反应速率则随ＯＢＢＡ的增加而增大。     

循环流液相等电聚焦方法及应用研究

利用循环流液相等电聚焦技术，对Ｈｂ、Ｃｙｔ．Ｃ和ＢＳＡ混合物进行分离，对ＲＮａｓｅＡ粗制品进行精制。该方法上样量大，活性回收好。对聚焦过程中扩散、对流和电渗的影响进行了讨论。     

非协调h－p型有限元补偿法

详细讨论了非协调ｈ－ｐ型有限元的补偿法，给出了令人满意的收敛阶．     

Microstructures of high-J c melt-textured YBa2Cu3O7−x /Ag superconductors

Silver has been previously added to the melt-textured YBa₂Cu₃O_7?x in order to increase the critical current density (J _c ) of these materials. However, the effect of this addition on theJ _c is presently unclear. The purpose of this study is to investigate the effect of silver on both critical current density and the microstructure of the melt-textured YBa₂Cu₃O_7?x superconductors by means of X-ray diffraction, optical polarized microscopy, and transmission electron microscopy (TEM). TheJ _c of the MTG YBCO/Ag samples is more than 10⁴A/cm² under the 5 kOe magnetic field. It has been shown that as the concentration of silver increases, the fraction of the 211 phase dispersed within the 123 matrix decreases. Therefore, theJ _c slightly decreases. These results, together with the effect of the 211 phase, dislocations, and other structure defects on flux pinning, are described in this paper.     

Teflon－AF~R──新一代的电子和光电功能聚合物材料

ＴｅｆｌｏｎＡＦ是新一代高性能的Ｔｅｆｌｏｎ氟碳树脂。完全非晶态的ＴｅｆｌｏｎＡＦ具有许多突出优点，如在１９０ｎｍ厚度内的完全透明度，低折射率（１．２９～１．３１）；突出的介电性能（在塑料家族中具有最低的介电常数）；良好的力学性能；宽温区的热性能和优良的化学惰性及在选定的全氟化溶剂内受限制的溶解性等等。ＴｅｆｌｏｎＡＦ在高科技领域中具有广泛的应用前景。如用作在光纤和集成光学方面的重要材料，半导体和工艺材料，介电和释放材料，特殊性能的化学和工业材料以及生物医学材料等。     

Establishment and characterization of three cell lines from Aedes triseriatus (Diptera: Culicidae)

The objectives of this study were to develop sex-, age-, and body size-specific nomograms and partition values for upper and lower limits of M-mode echocardiographic aortic root measurements derived from a large population-based cohort. The study sample consisted of 1433 male and 1816 female participants in the Framingham Heart Study and Framingham Offspring Study who were normotensive and free of clinically apparent heart disease at the baseline examination. Aortic root measurements were obtained by M-mode echocardiography by a leading-edge to leading-edge technique. The relations of age and measures of body size with aortic root dimensions were evaluated with sex-specific correlations and multiple stepwise linear regression analyses. Age was the most important determinant of aortic root size in both men and women in the multivariable regression models. Models with age and body surface area yielded R2 values of 0.214 in men and 0.222 in women. Models with age and height yielded lower R2 values of 0.136 in men and 0.181 in women. Thus aortic root dimensions vary widely with the age, sex, and body size of individuals. Sex-specific reference nomograms of aortic root dimensions in relation to age and body size (body surface area or height) are presented to facilitate the detection of abnormalities of aortic root size.     

解线性及二次型规划问题增广的神经网络

本文提出了一个解线性及二次型规划问题的神经网络模型，证明了该网络是全局稳定于平衡点，而平衡点就是线性及二次型规划问题的解，该网络的优点是能够实时获得问题的精确解，且可以同时获得带等式不式约束的对偶问题解，该网络易于电路实现。     

含能材料分子结构与感度的相关性

综述了国外近年来含能材料分子结构参数与感度相关关系的最新研究成果。研究表明：某些芳香族硝基化合物的撞击感度与Ｃ－ＮＯ２键强度有关；硝胺及脂肪族硝基化合物的冲击波感度与分子中Ｎ－ＮＯ２键的数目，长度和分子量相关。     

Bisensors for amino acids

Two kinds of biosensors for amino acids (one with nonspecific enzyme as bioelement, the other with specific enzyme(s) as bioelement), including their principles, applications, recent researches and future trends were discussed in detail. 61 references were given. A part of work for gaining Ph. D in chemical and biochemical application at FPMs (Mons, Belgique) Synopsis of the first author Xia Jinlan, Male, born in 1963, now at Facult’e Polytechnique de Mons, Belgique