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Preparation of PFSA/PSf hollow fiber composite membranes with recovered PFSA for the pervaporation separation of EtOH/H_2O

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science china Chemistry 2010年第1期53卷 273-280页

作者： LANG WanZhong1,2,TONG Wei2,XU ZhenLiang2 & GUO YaJun1 1Department of Chemistry,shanghai Normal university,shanghai 200234,china 2chemical engineering research center,east china university of science and technology,shanghai 200237,china Department of Chemistry Shanghai Normal University Shanghai China chemical engineering research center East China University of Science and Technology Shanghai China

Perfluorosulfonic acid/Polysulfone(PFSA/PSf) hollow fiber composite membranes have been prepared by dip-coating method using PSf ultrafiltration(UF) membrane as substrate with recovered *** composite membranes were applied to the pervaporation separation of 95% ethanol(EtOH)/H2O *** images show that the thickness of the PFSA skin layer of the composite membranes is about 2 μm,much thinner than those of other PFSA composite membranes revealed in the *** of annealing temperature,coating solution concentration and counter-ions of PFSA on the pervaporation performances of the composite membranes were *** total flux decreases and separation factor increases with the increase of annealing *** highest permeation flux of 3230 g m-2 h-1 and a separation factor of 5.4 is obtained for the composite membrane annealed at 80°*** lowest permeation flux of 396 g m-2 h-1 and a separation factor of 27.7 is obtained for the composite membrane annealed at 160°*** permeation performances of the PFSA/PSf composite membrane are evidently influenced by the counter-ions of *** flux sequence of the PFSA/PSf composite membranes with different counter-ions is H+>Li+>Ca2+>Mg2+>Na+>K+>Ba2+>Fe3+>Al3+,and the separation factor sequence is H+2+2+2+Na+>K+.There are very little variations of △Eapp values between the composite membranes with three divalent counterions(Mg2+,Ca2+ and Ba2+),and the △Eapp values of the composite membranes with two trivalent counterions(Fe3+ and Al3+) are relatively high.

关键词： pervaporation hollow fiber composite membrane perfluorslulfonic acid(PFSA) ethanol(EtOH)/H2O mixture

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Large-eddy simulations and vortex structures of turbulent jets in crossflow

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science china(Physics,Mechanics & Astronomy) 2007年第1期50卷 118-132页

作者： GUAN Hui1,2 & WU ChuiJie2 1 School of Mechanical and Power engineering,east china university of science and technology,shanghai 200237,china 2 research center for Fluid Dynamics,PLA university of science and technology,Nanjing 211101,china School of Mechanical and Power engineering East China University of Science and Technology Shanghai China research center for Fluid Dynamics PLA University of Science and Technology Nanjing China

Using the method of large-eddy simulation, the 3-dimensional turbulent jets in crossflow with stream-wise and transverse arrangements of nozzle are simulated, emphasizing on the dynamical process of generation and evolution of vortex structures in these flows. The results show that the basic vortex structures in literatures, such as the counter-rotating vortex pair, leading-edge vortices, lee-side vortices, hanging vortices, kidney vortices and anti-kidney vortices, are not independent physical substances, but local structures of the basic vortex structure of turbulent jets in crossflow-the 3-D stretching vortex rings originating from the orifice of the nozzle, which is discovered in this study. Therefore, the most important large-scale structures of turbulent jets in crossflow are unified to the 3-D vortex rings which stretch and twist in stream-wise and swing in transverse directions. We also found that the shedding frequencies of vortex rings are much lower than the one corresponding to the appearance of leading-edge and lee-side vortices in the turbulent jets.

关键词： turbulent jet in crossflow coherent structure large-eddy simulation

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θ-PSO: a new strategy of particle swarm optimization

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Journal of Zhejiang university-science A(Applied Physics & engineering) 2008年第6期9卷 786-790页

作者： Wei-min ZHONG1,2, Shao-jun LI1,2, Feng QIAN1,2 (1State Key Laboratory of chemical engineering, east china university of science and technology, shanghai 200237, china) (2Automation Institute, east china university of science and technology, shanghai 200237, china) State Key Laboratory of chemical engineering East China University of Science and Technology Shanghai China Automation Institute East China University of Science and Technology Shanghai China

Particle swarm optimization (PSO) is an efficient, robust and simple optimization algorithm. Most studies are mainly concentrated on better understanding of the standard PSO control parameters, such as acceleration coefficients, etc. In this paper, a more simple strategy of PSO algorithm called θ-PSO is proposed. In θ-PSO, an increment of phase angle vector replaces the increment of velocity vector and the positions are decided by the mapping of phase angles. Benchmark testing of nonlinear func- tions is described and the results show that the performance of θ-PSO is much more effective than that of the standard PSO.

关键词： Particle swarm optimization (PSO) Phase angle Benchmark function

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Removal of Trace Olefins from Aromatics by Catalytic Alkylation Using 1-Alkyl-3-methylimidazolium Bromochloroaluminate Catalyst

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china Petroleum Processing & Petrochemical technology 2011年第2期13卷 14-18页

作者： Sun Yu Shi Li(State Key Laboratory of chemical engineering,east china university of science and technology,shanghai 200237) State Key Laboratory of chemical engineering East China University of Science and Technology Shanghai 200237 China

Removal of trace olefins from aromatic liquids had been investigated in the presence of various ionic liquids like 1-ethyl-3-methylimidazoliurn bromochloroaluminate （EMIMBr-AlCl3）, 1-butyl-3-methylimidazolium bromochloroaluminate （BMIMBr-AlCl3）, l-hexyl-3-methylimidazolium bromochloroaluminate （HMIMBr-AlCl3）, and 1-octyl-3-methylimidazolium bromochloroaluminate （OMIMBr-A1C13）. It was found that the longer the alkyl chain of ionic liquid cations was, the higher the olefins conversion would be. OMIMBr-AlCl3 （with 0.67 molar fraction of AlCl3） had an obvious performance on olefins removal. The influences of various reaction parameters such as the dosage of catalyst, the reaction temperature, and the reaction time on the reaction catalyzed by OMIMBr-AlCl3 were investigated. Under optimum reaction conditions, a higher than 99% conversion of olefins was achieved. The preliminary results revealed that the process could save time, consume less energy, separate products easier, and cause less pollution to the environment.

关键词： ionic liquids olefins removal 1-alkyl-3-methylimidazolium bromochloroaluminate aromatic

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Two Observed Regions in B Lymphocyte Stimulator Important for Its Biological Activity

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Acta Biochimica et Biophysica Sinica 2006年第4期38卷 227-232页

作者： Qiong SHEN~(1,2) Su-Xia LI~1 Fei-Hao FU~1 Qin-Sheng YUAN~1* Yi GONG~2* 1 State Key Laboratory of Bioreactor engineering,east china university of science and technology,shanghai 200237,china 2 research center of Biotechnology,shanghai Institutes for Biological sciences,Chinese Academy of sciences,shanghai 200233,china State Key Laboratory of Bioreactor engineering East China University of Science and TechnologyShanghai 200237 China research center of Biotechnology Shanghai Institutes for Biological Sciences Chinese Academy of SciencesShanghai 200233 China

B lymphocyte stimulator （BLyS）,a member of the tumor necrosis factor superfamily ofligands,is a crucial survival factor for B *** successfully constructed seven mutants of the functionalsoluble fragment of human BLyS （named cBLyS,amino acid 134-285）,including three deletion mutants andfour site-directed *** the mutant proteins were expressed in Escherichia coli and purified by Ni-NTA affinity *** biological activities of these mutants were assessed by the ligand-recep-tor binding assay,B cell proliferation assay and immune effect response in *** results indicated thatfour residues,H218,F220,T228and L229,are indispensable for the biological activity of cBLyS,whereas tworegions,amino acid 134-148 and amino acid 271-285,are related to the biological activity of *** of deletion of amino acid 134-148 leads to a complete defection in raising the antigen-specific *** deletion of amino acid 271-285 reduces the effectiveness compared with the native *** that the region of amino acid 134-148 is indispensable for cBLyS to function normally.

关键词： B lymphocyte stimulator (BLyS) deletion mutant biological activity

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Fusion Protein of Interleukin 4 and Diphtherial Toxin with High Cytotoxicity to Cancer Cells

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Acta Biochimica et Biophysica Sinica 2004年第6期36卷 437-442页

作者： Yu-Jian ZHANG, Xiao-BoHU, Su-Xia LI1, Li-Ping TIAN, Sheng-Li YANG, and Yi GONG* research center of Biotechnology, shanghai Institutes for Biological sciences,Chinese Academy of sciences, Graduate School of the Chinese Academy of sciences, shanghai 200233, china State Key Laboratory of Bioreactor engineering, east china university of science and technology, shanghai 200237, china research center of Biotechnology Shanghai Institutes for Biological SciencesChinese Academy of Sciences Graduate School of the Chinese Academy of SciencesShanghai 200233 China State Key Laboratory of Bioreactor engineering East China University of Science and TechnologyShanghai 200237 China

Receptor of human interleukin 4 (hIL4R) has been found to be present on many types of cancer, so it may be a good target for cancer therapy. Here, fusion toxin gene DT4H has been constructed by fusing DNA sequence encoding the first 389 amino acids of diphtherial toxin (DT), which can not bind its own receptor, to human interleukin 4 (hIL4) gene. In order to improve the affinity of fusion toxin for hIL4R, a circularly permuted form of hIL4 (cpIL4) was used. The fusion gene was expressed in Escherichia coli where the fusion toxin DT4H was highly expressed. Purified DT4H was very cytotoxic to cancer cell line U251 cells, and moderate cytotoxic to HepG2 and MCF-7 cells. SGC-7901 cells were insensitive to it. The cytotoxic action of DT4H was specific because it was blocked by excess hIL4. These results suggest that DT4H may be a useful agent in the treatment of certain malignancies.

关键词： fusion toxin diphtherial toxin cancer therapy interleukin 4 IL-4 receptor

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Ni-loaded Catalyst Containing Activated Clay for Maleic Anhydride Hydrogenation to Succinic Anhydride

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china Petroleum Processing & Petrochemical technology 2011年第4期13卷 35-40页

作者： Tian Weiping Guo Shaofei Shi Li (The State Key Laboratory of chemical engineering, east china university of science and technology, shanghai 200237) State Key Laboratory of chemical engineering East China University of Science and Technology Shanghai 200237 China

In this work, the hydrogenation of maleic anhydride to succinic anhydride in the presence of 5 m%Ni/clay catalysts was investigated. These catalysts were characterized by X-ray diffraction （XRD）, H2 temperature programmed reduction （TPR） and thermogravimetric analysis （TGA） techniques. The XRD and TPR studies showed that Ni was present as Ni2＋ on the support, which indicated that there were no elemental nickel （Ni^0） and Ni203 species in the unreduced samples. Increasing of calcination temperature to 650 ℃ leads to destruction of the support structure observed in TGA, while the catalyst sample calcined at 550 ℃ exhibits better performances than other samples. The ideal conversion of maleic anhydride （97.14%） and selectivity of succinic anhydride （99.55%） were realized at a reaction temperature of 180 ℃ and a weight hourly space velocity of 4 h^-1 under a reaction pressure of 1 MPa.

关键词： maleic anhydride hydrogenation succinic anhydride nickel

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Study on Removal of Naphthenic Acids from White Oil by[BMIM]Br-AlCl_3

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china Petroleum Processing & Petrochemical technology 2010年第4期12卷 46-51页

作者： Li Jing Sun Yu Shi Li (The State Key Laboratory of chemical engineering,east china university of science and technology, shanghai 200237) State Key Laboratory of chemical engineering East China University of Science and Technology Shanghai 200237 China

The removal of acid compounds （naphthenates） from acidic oil with ionic liquids was systematically investigated. [BMIM]Br-AlCl3 was used to investigate the effect on deacidification of oil. Experimental results showed that at a temperature of 323K with a molar ratio of AlCl3 to [BM1M]Br-AlCl3 of 0.2, and a mass ratio of IL to white oil of 4%, the deacidification rate could reach 75.9%. And a reaction time of 4 h was sufficient to achieve the goal. The study on reproducibility of catalytic performance of [BMIM]Br-AlCl3 showed the possibility of using the ionic liquid in the continuous catalytic reaction.

关键词： naphthenic acid ionic liquid white oil deacidification

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ENDOR AND ESR STUDIES OF RADICALS FORMED IN FRIEDEL-CRAFTS REACTIONS

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science china Chemistry 1991年第11期34卷 1296-1303页

作者：桑鸿汪汉卿陈涛刘旭勤center of Analysis and research east china university of chemical technology shanghai 200237 PRC Lanzhou Institute of chemical Physics Academia Sinica Lanzhou 730000 PRC center of Analysis and research East China University of Chemical Technology

The present study deals with the study of some Friedel-Crafts alkylating system and the accurate measurement of hyperfine coupling constants by ESR and ENDOR techniques. The results indicate that the observed ESR spectra are due to polycyclic aromatic radical cations formed from their parent *** is suggested that benzyl halides produced in the Friedel-Crafts alkylating reaction undergo Scholl condensation reaction to give polycyclic aromatic hydrocarbons, which were converted into the corresponding polycyclic aromatic radical cations in the presence of aluminum chloride.

关键词： radical cations ESR ENDOR Friedel-Crafts reactions.

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An improved approach to the efficient construction of and search operations in motion graphs

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science china(Information sciences) 2012年第5期55卷 1042-1051页

作者： GAO Yan 1,CHEN ZhiHua 2,CHEN MinGang 3 & SHEN Yang 3 1 Software engineering Institute,east china Normal university,shanghai 200062,china 2 Department of Computer science and engineering,east china university of science and technology,shanghai 200237,china 3 Department of Computer science and engineering,shanghai Jiao Tong university,shanghai 200240,china Software engineering Institute East China Normal University Shanghai China Department of Computer science and engineering East China University of Science and Technology Shanghai China Department of Computer science and engineering Shanghai Jiao Tong University Shanghai China

Motion graphs have been widely used as an effective technique in the synthesis of human *** synthesize well-formed motions,motion graphs require smooth transitions and good ***,the time and costs grow quadratically as the graph size *** this paper,we present a method to set up a hierarchical structure,called a structure *** coarse level of this graph models different motion categories and their transitions,and the fine level mainly captures different motion *** interpolation space method is used to improve the graph connectivity at the fine *** structure guides the establishment of a faster and more realistic graphical *** the building process,this structure also helps with searching the motion graph,by performing a traverse search and placing the findings into a direct look-up table or local search ***,when there is no direct link between the different motions,a navigation map is introduced to conduct an appropriate search path via a series of transition motion *** experimental results indicate that our approach could lower the computation time in construction and searching,while simultaneously providing a richer variety of motion styles.

关键词： motion graph structure table registration curve motion interpolation

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