聚合物液体的状态方程

本文分析介绍了三个最广泛使用的聚合物液体状态方程，Ｆｌｏｒｙ、ＳＬ和ＳＳ方程及作者开发的三个新方程ＳＨＴ、ＳＨＴＦ和ＯＣＭ的理论基础和假设，并用１５个聚合物液体、１７个大分子量烃液体和６个常用有机溶剂的Ｐ－Ｖ－Ｔ数据作了比较。结果表明，ＯＣＭ方程精度最好，其他方程精度按ＳＳ、ＳＨＴ、ＳＨＴＦ、Ｆｌｏｒｙ、ＳＬ依次变差。结论是开放胞腔更接近液体的真实结构，空穴的引入可以改进胞腔理论的计算精度，Ｌ－Ｊ位能可以较好地反映液体中分子间的作用力。     

THE SOL-GEL APPROACH TO PREPARE NANOSIZED SnO_2 PARTICLES

ＴＨＥＳＯＬ－ＧＥＬＡＰＰＲＯＡＣＨＴＯＰＲＥＰＡＲＥＮＡＮＯＳＩＺＥＤＳｎＯ_２ＰＡＲＴＩＣＬＥＳ￥ＱｕａｎＬＩ；ＧｕａｎｇＦｕＺＥＮＧ；ＳｈｉＱｕａｎＸＩ（ＣｈａｎｇｃｈｕｎＩｎｄｉｒｕｔｅｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙ，ＡｃａｄｅｍｉａＳ?..     

液晶共聚物与PSF原位复合的界面研究

合成了两种热致性液晶共聚酯ＢＰ—ＬＣＰ和ＳＤＰ—ＬＣＰ，对其熔融指数、取向性作了考察。选用基体聚砜（ＰＳＦ）与液晶共聚酯进行熔融共混，得原位复合材料。ＳＥＭ断口形态显示了两种液晶在基体中不同的成纤性，并显示出两相的不相容性。采用ＦＴ—ＩＲ方法分析了液晶共聚酯与ＰＳＦ界面间的分子相互作用。进一步研究发现在ＰＳＦ／ＢＰ－ＬＣＰ原位复合体系中加入含ＰＳＦ和ＢＰ－ＬＣＰ的嵌段共聚物，其相容性得以改善     

PREPARATION AND CHARACTERIZATION OF A HIGH TEMPERATURE WATER-GAS SHIFT CATALYST

ＰＲＥＰＡＲＡＴＩＯＮＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＡＨＩＧＨＴＥＭＰＥＲＡＴＵＲＥＷＡＴＥＲ┐ＧＡＳＳＨＩＦＴＣＡＴＡＬＹＳＴＺｈｏｕＬｉｎｇｐｉｎｇ＊，ＧｕｏＹｉｑｕｎ，ＳｕＹｕｎｌａｉ，ＷａｎｇＷｅｎｘｉａｎｇ（Ｄｅｐａｒｔｍｅｎｔ...     

活性碳纤维ZnO—SACF氧化还原机理的研究

本文借助于ＩＲ，ＴＧ和ＸＰＳ，研究了ＺｎＯ－ＳＡＣＦ制备过程中及其吸附Ａｇ＾＋和Ａｕ＾３＋前后的化学结构变化。实验结果表明：从ＳＡＣＦ到ＺｎＯ－ＳＡＣＦ，纤维表面上的Ｏ／Ｃ原子比和含氧基团如Ｃ＝Ｏ和ＣＯＯ都有所减少；ＺｎＯ－ＳＡＣＦ上还原性功能基团主要是－Ｃ－ＯＨ，当ＺｎＯ－ＳＡＣＦ吸附Ａｇ＾＋后，－Ｃ－ＯＨ被氧化为－Ｃ＝Ｏ，而当其吸附Ａｕ＾３＋后，－Ｃ－ＰＨ被氧化为－Ｃ＝Ｏ和－（Ｏ＝Ｃ）－ＯＨ，     

THE EFFECT OF LIPID AND INTERLAYER HUMIDITY ON LIGHT－INDUCED CURRENT FROM MULTILAYER BACTERIORHODOPSIN LANGMUIT－BLODGETT FILMS

ＴＨＥ　ＥＦＦＥＣＴ　ＯＦ　ＬＩＰＩＤ　ＡＮＤ　ＩＮＴＥＲＬＡＹＥＲ　ＨＵＭＩＤＩＴＹ　ＯＮ　ＬＩＧＨＴ－ＩＮＤＵＣＥＤ　ＣＵＲＲＥＮＴ　ＦＲＯＭ　ＭＵＬＴＩＬＡＹＥＲ　ＢＡＣＴＥＲＩＯＲＨＯＤＯＰＳＩＮ　ＬＡＮＧＭＵＩＴ－ＢＬＯＤＧＥＴＴ　ＦＩＬＭ...     

（PSF—PDMS—PHS）n／PSF共混物的相容性及表面组成

利用ＤＳＣ、ＤＭＡ、ＴＥＭ和ＸＰＳ对［ＰＳＦ－ＰＤＭＳ－ＰＨＳ］ｎ／ＰＳＦ共混物的相容性及表面组成进行了研究．结果表明，ＰＤＭＳ在共混物表面的富集与ＰＳＦ均聚物和［ＰＳＦ－ＰＤＭＳ－ＰＨＳ］ｎ中硬段的相容性有关；ＰＤＭＳ在相容的共混物体系表面的富集与对应的多嵌段共聚物组成基本相近；不相容共混物体系表面ＰＤＭＳ的富集程度相对较高，当共混物本体中有机硅含量从１％增至５％，表面层ＰＤＭＳ的含量迅速增加，可达到嵌段共聚物中ＰＤＭＳ的含量．     

AN EFFICIENT AND STEREOSPECIFIC SYNTHESIS OF 1－PALMITOYL－2－［（z，z，z）－9，12，15－LINOLENOYL］－SN 2－GLYCEROPHOSPHOCHOLINE

ＡＮＥＦＦＩＣＩＥＮＴＡＮＤＳＴＥＲＥＯＳＰＥＣＩＦＩＣＳＹＮＴＨＥＳＩＳＯＦ１－ＰＡＬＭＩＴＯＹＬ－２－［（ｚ，ｚ，ｚ）－９，１２，１５－ＬＩＮＯＬＥＮＯＹＬ］－ＳＮＧＬＹＣＥＲＯＰＨＯＳＰＨＯＣＨＯＬＩＮＥ￥ＪｉｅＸＩＡａｎｄＹｏｎｇＺｈｅｎｇＨ...     

STUDIES ON LOW MOLECULAR WEIGHT MATERIALS CONTAINED IN POLY（P－PHENYLENE SULFIDE）

ＳＴＵＤＩＥＳＯＮＬＯＷＭＯＬＥＣＵＬＡＲＷＥＩＧＨＴＭＡＴＥＲＩＡＬＳＣＯＮＴＡＩＮＥＤＩＮＰＯＬＹ（Ｐ－ＰＨＥＮＹＬＥＮＥＳＵＬＦＩＤＥ）￥ＭｅｉＭｉｎｇＬＵＯ；ＣａｎＳｈｕＨＯＵ；ＪｉｅＹＡＮＧ；ＹｏｎｇＲｏｎｇＣＨＥＮ；ＱｉＸｉａｎＷＵ（Ｉｎ...     

动态光散射对良溶剂中酚酞型聚醚砜的研究

用动态光散射方法研究了酚酞型聚醚矾砜（ＰＥＳ－Ｃ０在良溶剂ＤＭＦ中的稀溶液性质。在稀熔液中，ＰＥＳ－Ｃ分子由于内旋转发生链折叠，整体上表现出柔性链的性质，较好的符合球形模型；而分子链的局部刚性结构又使分子尺寸稳定；它的扩散行为随温度的变化符合Ａｒｒｅｈｎｉｕｓ方程。表征了ＰＥＳ－Ｃ分子在稀溶液中的形态结构，且给出了ＰＥＳ－Ｃ分子在ＤＭＦ中的扩散系数，扩散活化能、无限稀时的扩散系数和流体力学半径等重     

Chemical modification of Chitosan for metal ion removal

In the current work some modification reactions have been conducted to modify Chitosan with some organic compounds, such as aldehydes and organic acids. On the other hand, different blends of Chitosan with some carbohydrates were prepared to obtain Chitosan derivatives of certain physical and chemical properties. The obtained products have been characterized with the necessary chemical and spectroscopic techniques. The efficiency of the obtained modified materials has been investigated for separation of metal ions and for water uptake.     

Preparation of VPS and PVD coatings for metallographic and TEM investigations

The aim of the first part of the paper is to give some advice for the faultless metallographic preparation of vacuum plasma sprayed coatings. Several coating/substrate combinations using metals, alloys and ceramics were investigated to derive some general rules. The second part deals with a preparation technique for cross-sections- of physical vapour deposition coatings. This technique was optimized for TiN and Ti(C, N) coatings on hardmetals which were examined in an analytical transmission electron microscope.     

Separation of mitochondria by flow field-flow fractionation for proteomic analysis

Flow field-flow fractionation (FlFFF) has been utilized for size-based separation of rat liver mitochondria. Collected fractions of mitochondria of various sizes were examined by confocal microscopy, and mitochondria of each fraction were lysed and analyzed by two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) for the comparison of protein patterns in differently sized mitochondria by densitometric measurements, and for protein characterization of some gel spots with nanoflow liquid chromatography-electrospray ionization-tandem mass spectrometry (nLC-ESI-MS-MS). FlFFF fractions of the mitochondria were also tryptically digested for shotgun proteomic characterization of mitochondrial proteins/peptides by nLC-ESI-MS-MS. Peak area (integrated ion counts) of some peptides extracted from LC-MS chromatograms were examined at different fractions for the quantitative comparison. Among 130 proteins, 105 unique proteins were found to be mitochodrial from the off-line combination of FlFFF and nLC-ESI-MS-MS analysis. It also showed that 23 proteins were found in all fractions but some proteins were found exclusively in certain fractions. Among 25 proteins listed from other subcellular species, seven proteins were known to exist in mitochondria as well as in other subcellular locations, which may support the possible translocation or multiple localizations of proteins among organelles. This study demonstrated effective use of FlFFF for the isolation and/or enrichment of intact mitochondria isolated from cells, as well as its potential use for the fractionation of other subcellular components in the framework of subcellular functional proteomics.     

Thermodynamic parameters for the binding of sulfate by open chain polyammonium cations

The interaction of sulfate with some open chain polyammonium cations was quantitatively studied by potentiometric (H(+)-glass electrode) measurements. Enthalpy changes, for some systems, were determined calorimetrically. Some literature data were also considered in the discussion of results. In all the systems, A(SO4)Hi(i-2) species are formed (i = 1, ...m; m = maximum protonation degree of amine), and, for i > or = 4, also A(SO4)2Hi(i-4) species were found. Both the stability and the formation enthalpies, for these complexes, are a direct function of the charges of reactants, and some empirical relationships are reported. A small, but significant, difference was found between the stability of unsubstituted and N-alkylsubstituted polyammonium cation-sulfate complexes.     

The application of coulometry for total antioxidant capacity determination of human blood

New coulometric method for estimation of blood and plasma total antioxidant capacity (TAC) based on using electrogenerated bromine was proposed. TAC of blood from patients with chronic renal disease undergoing long-term hemodialysis was investigated. Statistical significant changes in TAC level of venous and arterial blood were found. Catalase activity and low density lipoproteins (LDL) concentrations were determined. Linear correlation between TAC and parameters mentioned was found. Contribution from some individual antioxidants was investigated. The developed method for TAC assay is expressive, simple, stable and reliable, and successfully could be used for TAC determination of some biological fluids. This method could be applied in clinic for estimation of blood TAC from patients.     

Radiation sterilization of chitosan sealant for vascular prostheses

Chitosan was used as a sealant of knitted polyester vascular grafts. Three sterilization methods for chitosan-coated prostheses were tested: sterilization with ethylene oxide, formaldehyde and irradiation with gamma rays. Radiation sterilization was found to be the most promising of tested methods. The radiation-induced changes in chitosan irradiated in solid state were investigated. Main chain scission was found as the predominant effect of irradiation. Changes in IR and UV spectra were analyzed. Existence of some post-effects was detected. It seems that the observed increase in biocompatibility of chitosan surface caused by irradiation with sterilizing dose (25 kGy) is due to some structural factor connected with a decrease in molecular weight.     

泉生热袍菌结构基因组的选靶研究

对泉生热袍菌进行了结构基因组的选靶研究，从泉生热袍菌的蛋白组中挑选了20个蛋白质作为第一批进行结构测定的目标，以发现新的蛋白质折叠模式. 选靶研究主要使用了BLAST搜索， PSI-BLAST搜索和ProtoNet数据库搜索等方法. 另外，还用PredictProtein程序对选中的蛋白质进行了二级结构和外形预测. 选中的20个蛋白质中有8个被克隆、表达和纯化，其中2个得到了单晶并收集了X衍射数据. 实验结果和最近一些文献报道的结果表明，挑选的一些蛋白质具有新的折叠模式，表明了这种选靶策略的有效性.     

Stochastic search for the conformations of bicyclic hydrocarbons

The stochastic search method was used to seek all of the conformations for 32 bicyclic hydrocarbons. Since the size of the random kick used is sufficient to invert the configurations of carbon atoms, the out, out, in, out, and in, in conformations were all found in a single stochastic run for each hydrocarbon. The lowest energy conformer obtained in each category is reported. A modification of the program to prevent inversion of configuration was developed. It was found, in some cases, that in, in and out, out isomers for some bicyclic hydrocarbons were interconverted by this modified program, presumably through the “homeomorphic isomerization” process described by Park and Simmons. A statistical formula for estimating the approximate chances of finding (or missing) any conformer as a function of the number of random kicks given is derived and presented.     

Development of dynamic compartment model for prediction of behavior of radioiodine in rice paddy field

For the assessment of a public impact caused by radionuclides released from nuclear facilities, a dynamic compartment model was developed for prediction of behavior of radioiodine in air, paddy field and rice plant system. The transfer coefficients among compartments were determined by some experimental data and assumptions for each chemical form of iodine. A verification of the model was carried out by some case studies.     

Use of multiwalled carbon nanotube disks for the SPE of some heavy metals as 8-hydroxquinoline complexes

A multiwalled carbon nanotube disk was used for the SPE of some toxic heavy metals from environmental samples. Metal ions were adsorbed on the disk as 8-hydroxquinoline complexes, then quantitatively desorbed from the disk by using 10 mL 2 M HNO3. The effects of analytical parameters, including pH, sample volume, and flow rates, on the recoveries of Cd(II), Co(II), Ni(II), Pb(II), Fe(III), Cu(II), and Zn(II) were investigated. The influences of some 1A and 2A group elements and some other ions as concomitant ions on the recoveries of analyte ions were also examined. The LODs of the presented preconcentration-separation system for the analyte ions were found to be in the range of 1.0-5.2 microg/L. In order to validate the procedure, SRM 1577B Bovine Liver, IAEA 336 Lichen, and HR-1 Humber river sediment certified reference materials were analyzed. The proposed method has been applied to the determination of understudy elements in some pharmaceutical samples and natural water samples from different sites in Turkey.