石英芯片电泳分离检测尿中蛋白的研究

通过对缓冲体系、缓冲液浓度、酸度、乳酸钙浓度、乙胺浓度、电泳电压和进样时间的优化选择，用石英芯片电泳一紫外检测法分离了纯人白蛋白和人运铁蛋白；在75mmol／L硼酸盐（pH10．55）（含0．8mmol／L乳酸钙、1％（φ）乙胺）运行缓冲液中，上述两组分在3min内完全分离；纯人白蛋白和人运铁蛋白的线性范围分别为1．0～15．0g/L和1．0～10．0g／L；检出限（S／N=3）均为0．5g／L，应用于临床尿蛋白分离测定，并与Helena琼脂糖凝胶电泳仪电泳结果进行比较，获得一致结果。     

Fe(OH)2悬浮液在EDTA作用下氧气氧化生成δ-FeOOH的机理研究

At room temperature and in the presence of trace EDTA, the formation of δ-FeOOH was studied by the rapid oxidation of Fe(OH)2 suspension with O2. The structural and morphological changes were characterized by various techniques such as XRD, FTIR and TEM. γ-FeOOH and δ-FeOOH formed simutaneously in the early period of oxidation. But as the rate of mass transfer was in equilibrium, trace γ-FeOOH vanished gradually. Accordingly, pure phase δ-FeOOH was obtained. At the same time, critical amount ratio K of EDTA to Fe^2 was verified. The experiments show that the reactivity, rate of the oxidizing agent and pH of the initial medium were important factors for the formation of pure phase δ-FeOOH. Under the auxiliary effect of EDTA, the reactivity of O2 was nearly improved to that of H2O2. And the process of the oxidation that Fe(OH)2 suspension was oxidized by O2 under that condition was discussed.     

过渡金属掺杂二氧化钛光催化性能的研究

采用浸渍法制备了过渡金属掺杂的光催化剂MOx/TiO2(M=Cr、Mn、Fe、Co、Ni、Cu).以乙酸的光催化氧化降解反应为探针,研究了催化剂的光催化性能.研究结果表明,经过渡金属掺杂改性的二氧化钛,光催化性能都有所提高.掺杂量有一个最佳值,在最佳掺杂量时,催化剂光催化性能的提高程度与对应金属氧化物的生成焓有很好的一致性,还发现光催化性能与过渡金属离子稳定氧化态的电子亲和势与离子半径的比值间呈现火山型关系曲线.     

光照对高铁酸盐溶液稳定性的影响

The effects of light wave on the stability of fen'ate solution have been examined. The results showed that UV-light accelerates the decomposition of ferrate with decomposition rate 1.6 times as much as that in dark whereas infrared light has only unclear effect on the stability of ferrate, with decomposition rate 1.1 times as much as in dark. The polythene container is found to the best for preservation of ferrate solution in dark.     

胶束电动色谱法分离与测定己烯雌酚片剂中的有效成分

建立了一种用来分离测定己烯雌酚的胶束电动色谱法,。通过对十二烷基硫酸钠、胆酸钠、脱氧胆酸钠3种表面活性剂进行比较,选定以60mmol/LSDS 10mmol/L硼砂的水溶液作为背景电解质溶液,研究了不同pH对分离己烯雌酚的影响。该方法被应用于测定己烯雌酚片剂中有效成分的含量。     

反胶团相转移法提取青霉素G的研究

报道了非蛋白质类活性物质青霉素Ｇ在反胶团相转移提取中的特性和机理。结果表明，青霉素Ｇ在ＣＴＡＢ／正辛醇：氯仿（４：１，Ｖ／Ｖ）反胶团体系中的相转移提取为离子对静电作用与胶团溶解机理；在室温及ｐＨ值５～８的条件下，提取率在９０％以上，且保持了青霉素的稳定性。     

热处理过程中非晶态聚芳酯超分子结构的变化

本文采用TEM、SAXS及DSC等方法研究了经WAXD证明的芳香族聚酯在T_g,附近退火过程中形成的区域结构,在TEM观察中采用了金装饰制样技术,使形态观察更为清晰,在SAXS测量中采用了Kratky准直系统而提高了分辨率,在DSC测量中,从剩余焓(△H)对升温速率作图,求得热力学平衡态时的(△H)_0。结果证明,聚芳酯在T_g以下长时间退火时,可以形成40—60nm的区域结构。     

1,2,4-三嗪类化合物的研究 VIII: 3-甲硫基-5-羟基-1,2,4-三嗪-6-羧酸乙酯和N^2-[5'-(3'-甲硫基-6'-乙氧羰基)-1',2',4'-三嗪基]-3-甲硫基-5-氧代-1,2,4-三嗪-6-羧酸乙酯的氧化及其取代反应

本文报道3-甲硫基-5-羟基-1,2,4-三嗪-6-羧酸乙酯(4)及N^2-[5'-(3'-甲硫基-6'-乙氧羰基)-1',2',4'-三嗪基]-3-甲硫基-5-氧代-1,2,4-三嗪-6-羧酸乙酯(8)分子内,甲硫基的氧化及其就地与取代芳胺进行亲核取代反应.3-甲砜基和N^2-[5'-(3'-甲硫基-6'-乙氧羰基)-1',2',4'-三嗪基]作为离去基,其离去能力相近.     

我国大戟二萜酯及其生理活性研究新进展

介绍了我国近１０年来从大戟属植物中发现的二萜酯类新化合物及它们的刺激性，抗癌活性和杀菌作用等生理活性的研究，其中包括５种新发现碳骨架的２０个高氧化型二萜多酯类化合物。     

MORPHOLOGICAL OBSERVATION OF SINGLE-CHAIN POLY (METHYL METHACRYLATE) PARTICLES*

Tapping mode atomic force microscope has been applied to observe single-chain PMMAparticles which were stored for six months at room temperature after sprayed from verydilute solutions in good solvents, good/poor mixed solvents, and a theta solvent. Monodis-perse PMMA standards of molecular weights ranging from 7.90×10~4 to 1.3×10~6 wereused to investigate the effect of molecular weight oh the size of the single-chain PMMAparticles. These single-chain particles showed close to spherical shapes. The morphologyof single-chain PMMA particles of a given molecular weight was found to be identical inspite of different solvents used for solution spraying. Molecular weigh dependence of theparticle dimension was also found. The diameters of single-chain PMMA particles aftercorrection of tlp-geometry effect were compared to the values estimated from molecularweight and density.