一类菁染料的SERS光谱研究

本文报导了一类菁染料在银溶胶中和吸附在硝酸刻蚀的银和铜箔上的SERS 光谱以及两种方式的比较。对硝酸刻蚀粗化银和铜箔表面的最佳条件进行了讨论,区别于银溶胶,用粗化银和铜箔测得了共振 SERS 光谱。提出了菁染料分子在铜、银表面吸附的可能方式。     

百焦耳级XeCl准分子激光实验研究

介绍了西北核技术研究所利用“闪光Ⅱ号”强流相对论电子束加速器作泵浦源研制的百焦耳级XeCl准分子激光器的主要性能和实验结果。     

Kinetic assay of antitrypsin in human serum by a surface acoustic wave (SAW)-impedance sensor

Antitrypsin in human serum was determined by using both the SAW-impedance sensor system and spectrophotometry, indicating that the mean value for women was significantly higher than the mean value for men; the value for acute pancreasis patients is about 2-folds of the normal values, and there is no significant difference between the acute pancreasis patients and the pancreatic cancer patients.     

羧甲基纤维素水凝胶生物降解动力学研究

用氯化铝对羧甲基纤维素进行交联,制得了水凝胶.考察了底物浓度、酶浓度以及降解温度对该水凝胶降解速率的影响,探讨了酶降解动力学及“表观”活化能对酶浓度的依赖关系.结果表明,该酶促反应最佳温度为37 ℃,降解反应对底物浓度和酶浓度的反应级数分别为1级和1.2级;得到了与传统的Michaelis-Menten动力学机制不同的非均相酶促反应动力学模型,确定了“表观”活化能与酶浓度之间的定量关系.     

聚乙烯球晶在单向拉伸下的形变Ⅱ

用电子显微镜研究了聚乙烯球晶在单向拉伸下由球晶结构转变到纤维结构的全部过程,电子显微图象及大小角电子衍射表明,纤维是由一束“细纤维”所组成,细纤维则是由垂直于细纤维轴的折迭链块沿纤维轴的方向平行排列而组成的。     

Interweaving 3D network with double helical tubes filled by 1D coordination polymer chains

The hydrothermal reaction of mellitic acid, 4,4'-bipydine, and Cu(CH(3)COO)(2).H(2)O gave rise to a novel 3D supramolecular architecture interpenetrated by three types of coordination polymer motifs. Two independent [[Cu(2)(mellitate)(4,4'-bpy)(H(2)O)(2)](2)(-)] 3D polymers incorporating helical substructures were interwoven into a 3D network with double-stranded helical tubes that host 1D linear polymers [Cu(4,4'-bpy)(H(2)O)(4)](2+)](n).     

钨—镍—铁系重合金中粘结相的定量测定

通过对９３Ｗ－Ｎｉ－Ｆｅ－Ｃｏ（Ｍｎ）合金中粘结相和钨颗粒化学及电化学性质的研究，提出了一种定量提取Ｗ－Ｎｉ－Ｆｅ系重合金中粘结相的电解液，建立了定量测定其粘结相和钨颗粒组成及含量的方法。     

Preparation and characterization of periodic mesoporous organosilica terminally functionalized with fluorocarbon groups by a direct synthesis

Fluorocarbon groups were used to modify the pore channels of ethane-bridged periodic mesoporous organosilica by the co-condensation of 1,2-Bis(triethoxysilyl)ethane (BTESE) and trifluoropropyltrimethoxysilane (TFPTMS) in the presence of Poly(ethylene glycol)-B-Poly(propylene glycol)-B-Poly(ethylene glycol) (P123) surfactants under acidic conditions. The functionalized materials were investigated in detail by means of XRD, TEM, FT-IR, solid-state NMR, and N₂ adsorption. The effect of fluorocarbon groups concentration on the mesoscopic order and pore structure of the functionalized materials was also studied. The results show that bridging groups in the framework do not cleave and fluorocarbon groups are attached covalently to the pore wall of periodic mesoporous organosilica after functionalization. The samples functionalized with 20% TFPTMS remain desired mesoporous architecture, with a narrow pore size distribution centered at 4.1 nm, a large surface of 834 m²/g and a pore volume of 0.91 cm³g⁻¹, without pronounced change compared to the pure periodic mesoporous organosilica. Unfortunately the functionalized materials become structurally disordered with increasing amount of fluorocarbon groups.