Donator-Acceptor Komplex Chromatographie Tetrachlorphthalimidopropylsilica,eine neue,chemisch gebundene Phase,geeignet zur Trennung von Kohleverflüssigungsprodukten und anderen technischen aromatischen Gemischen mit der Hochleistungsflüssigkeitschromatographie

Summary The preparation of a new tetrachlorophthalimidophase for HPLC is described. The capacity ratios (k) of about forty aromatics and twenty nitrogen-containing aromatics were determined. Most of the compounds used were alkylated. It was shown that the aromatics were eluted according to the number of rings, only slightly influenced by the substituents. A similar elution order was not observed with the heteroaromatics. The performance of the stationary phase is demonstrated, performing separations of coal liquids and other aromatic mixtures.

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Donator-Acceptor Komplex Chromatographie Tetrachlorphthalimidopropylsilica, eine neue, chemisch gebundene Phase, geeignet zur Trennung von Kohleverflüssigungsprodukten und anderen technischen aromatischen Gemischen mit der Hochleistungsflüssigkeitschromatographie

Zusammenfassung Es wird die Synthese einer neuen Tetrachlorphthalimid-Phase für die HPLC beschrieben. Anhand von Elutionsversuchen mit über vierzig Aromaten und zwanzig N-Heteroaromaten, die größtenteils alkyliert waren, konnte gezeigt werden, daß kondensierte Aromaten unabhängig vom Alkylierungsgrad streng nach der Zahl der aromatischen Ringe eluiert werden, was für die Heterocyclen nicht zutrifft. Die Kapazitätsverhältnisse (k) der untersuchten Verbindungen werden angegeben. Die Leistungsfähigkeit der Phase wird an der chromatographischen Trennung von Kohleverflüssigungsprodukten und anderen komplexen, aromatischen Gemischen demonstriert.

     

纳米CeO2基固溶体催化柴油机碳颗粒物燃烧性能

采用柠檬酸溶胶鄄凝胶法制备CeO2基固溶体催化剂(Ce0.7Zr0.3O2-δ、Ce0.7Pr0.3O2-δ和Ce0.7Gd0.3O2-δ), 并考察了固溶体和三种常用载体(TiO2、SiO2和Al2O3)及其负载KNO3后的催化碳黑燃烧活性. 结果表明, CeO2基固溶体催化剂具有很高的催化燃烧活性, 其活性接近TiO2、SiO2和Al2O3负载30%KNO3催化剂的活性. 因为纳米CeO2基固溶体的形成, 提高了催化剂的抗烧结能力, 使氧更活泼, 从而提高氧化还原性能, 有利于碳颗粒燃烧. 由于CeO2基固溶体本身的高活性, 因此KNO3的添加不能明显提高CeO2基固溶体催化剂(尤其是Ce0.7Zr0.3O2-δ和Ce0.7Pr0.3O2-δ)的催化燃烧活性, 但KNO3能显著提高TiO2, SiO2和Al2O3的催化燃烧活性.     

Expression and Characterization of Catalytic Domain of T Cell Protein Tyrosine Phosphatase（△TC-PTP） —— Immunohistochemical Study of △TC-PTP Expression in Non-small Cell Lung Carcinomas

This study objective was to express and characterize the catalytic domain of the human T cell protein tyrosine phosphatase（△TC-PTP） and to study immunohistochemically the expression of △TC-PTP in human non-small cell lung cancers. △TC-PTP gene was PCR amplified with the cDNA of human TC-PTP as template, and cloned into the pT7 expression vector. The recombinant pT7-△TC-PTP was expressed in E. coli Rosetta （ DE3 ） host cells and puri- fied. The enzymatic characteristics of △TC-PTP including enzyme activity and kinetics assay were measured. The antiserum was prepared by immunizing rabbit with the purified recombinant △TC-PTP. Rabbit polyclonal antibody against △TC-PTP was purified by PVDF immobilized antigen affinity chromatography. Immunohistochemical staining of lung cancer tissues was performed with antibody against △TC-PTP protein. △TC-PTP gene was correctly cloned, expressed, and purified. The recombinant △TC-PTP had a highly catalytic activity of PTPase. Squamous cell lung carcinoma showed a significantly higher expression rate of △TC-PTP （76. 92%, 10/13 ） than adenocarcinoma （57.14%, 4/7） and normal lung tissue（20%, 1/5 ）. This study represents the first demonstration that △TC-PTP is highly expressed in human squamous cell lung carcinomas. In addition, this study provides an important basis for further studying the biological function of TC-PTP and its relationship with lung carcinomas and other diseases.     

POLYMER-SUPPORTED LEWIS ACID CATALYSTS. Ⅵ. POLYSTYRENE-BONDED STANNIC CHLORIDE CATALYST

A polystyrene-bonded stannic chloride catalyst was synthesized by the method of lithium polystyryl combined with stannic chloride. This catalyst is a polymeric organometallic compound containing 0.25 mmol Sn (Ⅳ)/g catalyst. The catalyst showed sufficient stability and catalytic activity in organic reaction such as esterification, acetalation and ketal formation, and it could be reused many times without losing its catalytic activity.     

Parametric study of catalytic reforming process?

Summary A parametric study of catalytic reforming process in a pilot plant was carried out by varying the pressure, H₂/HC ratio, and space velocity. The results show that lower aromatics and higher hydrogen yields can be accomplished by increasing the space velocity in existing reformers, which will also result in better C₅⁺yield.     

Catalytic oxidation of alcohols with polymer-supported ruthenium complex under mild conditions

Polymer-supported ruthenium-containing complex PS–Phen–Ru was synthesized (where PS = chloromethyl polystyrene resin, Phen = 1,10-phenanthroline) and was characterized by FT-IR, ICP, and XPS. The supported complex was used to catalyze the oxidation of primary aliphatic alcohols as well as aromatic alcohols in the presence of iodosylbenzene. The oxidations were carried out in acetonitrile solution, affording the corresponding aldehydes or ketones in high substrate conversion and high selectivities under mild reaction conditions. The catalyst can be easily prepared and can be recycled.     

煤液化残渣与褐煤混煤燃烧特性的实验研究

煤液化是提高煤炭资源利用率、减轻燃煤污染的有效途径[1].在煤液化工艺过程中,煤液化残渣的主体是由液化原料煤中未转化的煤有机体、无机矿物质以及外加的液化催化剂组成,是一种高炭、高灰和高硫的物质,在某些工艺中会占到液化原煤总量的30%左右,如此多的残渣量对液化过程的热效率和经济性所产生的影响是不可低估的[2].     

Bioinspired manganese complexes catalyzed epoxidation for the synthesis of the epoxyketone fragment of carfilzomib

We report herein an efficient catalytic epoxidation reaction for the synthesis of epoxyketone (tert-butyl ((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)carbamate), which is an important synthetic intermediate of carfilzomib.     

溴酸钾氧化靛红催化光度法测定痕量亚硝酸根

基于磷酸介质中ＮＯ２＾－催化溴酸钾氧化靛红的褪色反应，建立了测定痕量ＮＯ２＾－的新方法，并讨论了其动力学条件。方法检测限为１．３６×１０＾－６ｇ／Ｌ，线性范围０．３￣２μｇ／２５ｍＬ，方法简便，已用于环境水样中痕量ＮＯ２＾－的测定。     

催化极谱法连续测定岩石中钨和钼

本文提出了在二苯基乙醇酸-二苯胍-氯酸钠催化极谱体系测钨后,加入少许钛铁试剂,使钼产生一个极灵敏的导数波。谊波形尖锐、对称,便于测量钼。建立的连测体系简便灵敏,用于岩石样品中钨和钼的测定,取得了满意的效果。