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CARBON MATERIALS FOR LITHIUM ION BATTERIES

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Chinese Chemical Letters 1996年第4期7卷 389-390页

作者： Ma, sh Li, j jing, XB Wang, FS ACAD SINICA CHANGCHUN INST APPL CHEMPOLYMER PHYS LABCHANGCHUN 130022PEOPLES R CHINA

The preliminary work indicated that passive film is the most important factor influencing cell performance of carbon anode, and the carbon and solvent used govern cell performance by forming the passive film of differ... 详细信息

关键词： ION CARBON MATERIALS FOR LITHIUM ION BATTERIES

The Possibility of Wax Formation in Gas Fields:a Case Study

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journal of Natural Gas Chemistry 2007年第3期16卷 293-300页

作者： Z.jeirani A.Lashanizadegan sh.Ayatollahi j.javanmardi School of Chemical and Petroleum Engineering Shiraz UniversityShirazIran School of Chemical Engineering Shiraz University of TechnologyShiraz.Iran

Natural gas production from a gas reservoir （Reservoir A） located in the south of Iran, presents solids deposition during processing because the condensate contains suspended and dissolved solids. Solids deposition occurs not only in the transportation lines from the wells to the separators but also in the various operating units of gas streams and condensate stream. In this study, the multisolid-phase model has been used to predict the wax precipitation from gas and gas condensate fluids. The properties of gas and liquid phases are described using the Soave-Redlich-Kwong （SRK） equation of state. The model is then used to predict the possibility of the wax formation in Reservoir A gas facilities, located at the south of Iran. Solid deposition which occurred in the various streams of that facility confirmed the calculated results. Finally, the wax appearance temperature （WAT）, the weight percent of wax formation and the effects of pressure and temperature on the wax formation were also predicted.

关键词： wax precipitation fluid phase equilibria multisolid model gas condensate

Effect of porosity on active damping of geometrically nonlinear vibrations of a functionally graded magneto-electro-elastic plate

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Defence Technology（防务技术） 2022年第6期18卷 891-906页

作者： L.sh Esayas Subhaschandra Kattimani Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkal575025India

This paper investigates the effect of porosity on active damping of geometrically nonlinear vibrations(GNLV)of the magneto-electro-elastic(MEE)functionally graded(FG)plates incorporated with active treatment constricted layer damping(ATCLD)*** perpendicularly/slanted reinforced 1-3 piezoelectric composite(1-3 PZC)constricting *** constricted viscoelastic layer of the ATCLD is modeled in the time-domain using Golla-Hughes-Mc Tavish(GHM)*** types of porosity distribution in the porous magneto-electro-elastic functionally graded PMEE-FG plate graded in the thickness *** the coupling effects among elasticity,electrical,and magnetic fields,a three-dimensional finite element(FE)model for the smart PMEE-FG plate is obtained by incorporating the theory of layer-wise shear *** geometric nonlinearity adopts the von K arm an *** study presents the effects of a variant of a power-law index,porosity index,the material gradation,three types of porosity distribution,boundary conditions,and the piezoelectric fiber’s orientation angle on the control of GNLV of the PMEE-FG *** results reveal that the FG substrate layers’porosity significantly impacts the nonlinear behavior and damping performance of the PMEE-FG plates.

关键词： Nonlinear vibration Magneto-electro-elastic(MEE)plates Active treatment constricted layer damping(ATCLD) Porosity distribution Porous functionally graded

Induction of apoptosis by arsenic trioxide and hydroxycamptothecin in gastric cancer cells in vitro

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World journal of Gastroenterology 2000年第4期6卷 532-539页

作者： Tu SP Zhong j Tan jH jiang XH Qiao MM Wu yX jiang sh shanghai Second Med Univ Ruijin Hosp Dept Gastroenterol Shanghai 200025 Peoples R China

AIM To study the effects of arsenic trioxide andHCPT on different degrees of differentiated gastriccancer cells（SGC-7901,MKN-45,MKN-28）withrespect to both cytotoxicity and induction ofapoptosis in *** The cytotoxicity of As2O3 and HCPTon gastric cancer cells was determined by *** changes of apoptosis ofgastric cancer cells were observed by lightmicroscopy and transmission electron *** and cell cycle changes of gastric cancercells induced by HCPT and As2O3 were investigatedby TUNEL method and flow *** As2O3 and HCPT had remarkablecytotoxic effects on different degrees ofdifferentiated gastric cancer *** IC50ofAs2O3 on well differentiated gastric cancer cellMKN-28,moderately differentiated gastric cancercell SGC-7901,and poorly differentiated gastriccancer cell MKN-28 were 8.91 μmol/L,10.57μmol/L,and 11.65 μmol/L,*** IC50of HCPT on MKN-28,SGC-7901,and MKN-45 were9.35 mg/L,10.21 mg/L,and 12.63 mg/Lrespectively after 48 h *** 12 h ofexposure to both drugs,gastric cancer cellsexhibited morphologic features of apoptosis,including cell shrinkage,nuclear condensation, and formation of apoptotic bodies.A typicalsubdiploid peak before G0/G1 phase was observedby flow *** apoptotic rates of SGC-7901,MKN-45,and MKN-28 were 13.84%,22.52%,and 9.68%,respectively after 48 hexposure to 10 μmol/L As2O3.The apoptotic ratesof SGC-7901,MKN-45,and MKN-28 were 21.88%,12.35%,and 30.26%,respectively after 48 hexposure to 10 mg/L *** apoptotic indicewere 7%-15% as assessed by TUNEL *** effect of As2O3 on SGC-7901 showedremarkable cell cycle specificity,which inducedcell death in G1 phase,and blocked G2/M *** also showed a remarkable cell cyclespecificity,by inducing cell death and a

关键词： gastric cancer apoptosis arsenic trioxide hydroxycamptothecin

Experimental and Numerical Analysis of Oil-Water Flow with Drag Reducing Polymers in Horizontal Pipes

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Fluid Dynamics & Materials Processing 2023年第10期19卷 2579-2595页

作者： Amer A.Abdulrahman Bashar j.Kadhim Zainab y.shnain Hassan sh.Majidi Asawer A.Alwaiti Farooq Al-sheikh Adnan A.AbdulRazak Mohammed shorbaz Mazin j.shibeeb Chemical Engineering Department University of TechnologyBaghdadIraq Department of Chemical Engineering and Petroleum Industries Al-Mustaqbal University CollegeBabylonIraq East Baghdad Southern EBS PETROLEUM COMPANy BaghdadIraq

The well-known frictional effect related to liquid-liquid two-phaseﬂow in pipelines can be reduced using drag-reducing *** this study,such an effect has been investigated experimentally using a mixture of oil and ***,numerical simulations have been carried out using the COMSOL simulation *** mea-surements were taken in a horizontal pipe with the length and diameter equal to 3 and 0.125 m,***,Polyethylene oxide with 150 ppm was exploited to reduce the drag effect while considering different water-to-oil fractions(0.3,0.4,0.5,and 0.7)and a constant totalﬂow velocity of 2.3 m/*** made evident by the results,a signiﬁcant reduction can be obtained in terms of pressure drop,which becomes even more signiﬁcant as the water to oil fraction is *** maximum achieved drag reduction is 70%with a water fraction of *** results also show that the addition of polymer additives can also have an impact on theﬂow ***-parison of experimental and numerically determined pressure drop indicates that the error is smaller than 7%.

关键词： Two-phase flow drag reduction polymer COMSOL

Sorption of certain lanthanides by kieselguhr loaded with Cyanex 572 from sulfate medium

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journal of Rare Earths 2020年第3期38卷 299-305页

作者： sh.sh.Emam M.S.Gasser N.E.El-Hefny W.H.Mahmoud H.F.Aly Hot Laboratories Centre Atomic Energy AuthorityCairo 13759Egypt Department of Chemistry Faculty of ScienceAin Shams UniversityCairoEgypt

Kieselguhr for chromatography was loaded with Cyanex 572 extractant and characterized using X-ray diffraction(XRF),scanning electron microscopy(SEM),Fourier transform infra-red(FT-IR),and thermal *** of some heavy lanthanides together with yttrium by the prepared kieselguhr/Cy-572 sorbent was investigated by batch experiment in terms of initial metal ions concentrations,volume to solid mass ratio(V/m),sulfuric acid concentration as well as *** sorption equilibrium of Cy-572 loaded kieselguhr was satisfactorily explained by the pseudo second-order kinetic model and Langmuir isotherm ***,the values of thermodynamic parameters △G°,△H°,and △S°at25℃of the studied metal ions show that the process is spontaneous and endothermic in nature.2.0 mol/L HNO3 is promising to desorb these metal ions.

关键词： Sorption Cyanex 572 Lanthanides Kieselguhr Sulfate medium Rare earths

Discontinuous Sturm-Liouville Problems Containing Eigenparameter in the Boundary Conditions

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1519-1528页

作者： M.KADAKAL O.sh.MUKHTAROV Ondokuz Mayis University Science and Arts Faculty Department of MathematicsKurupelit 55139 Samsun Turkey Gaziosmanpasa University Science and Arts Faculty Department of MathematicsTokat 60000 Turkey

In this paper, discontinuous Sturm-Liouville problems, which contain eigenvalue parameters both in the equation and in one of the boundary conditions, are investigated. By using an operatortheoretic interpretation we extend some classic results for regular Sturm-Liouville problems and obtain asymptotic approximate formulae for eigenvalues and normalized eigenfunctions. We modify some techniques of [Fulton, C. T., Proc. Roy. Soc. Edin. 77 （A）, 293-308 （1977）], [Walter, j., Math. Z., 133, 301-312 （1973）] and [Titchmarsh, E. C., Eigenfunctions Expansion Associated with Second Order Differential Equations I, 2nd edn., Oxford Univ. Pres, London, 1962], then by using these techniques we obtain asymptotic formulae for eigenelement norms and normalized eigenfunctions.

关键词： Sturm-Liouville problem discontinuous boundary-value problem eigenvalue and eigenfunction eigenelement normalized eigenfunctions

Lower Bounds for Local Cohomology Modules with Respect to a Pair of Ideals

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Algebra Colloquium 2016年第2期23卷 329-334页

作者： M. Lotfi Parsa sh. Payrovi Faculty of Science Sayyed Jamaleddin Asadabadi University Postal code: 65418-3-5583 Asadabad Iran Department of Mathematics Imam Khomeini International University Postal code: 34149-1-6818 Qazvin Iran

Let R be a Noetherian ring, I and j two ideals of R, M an R-module and t an integer. Let S be a Serre subcategory of the category of R-modules satisfying the co ondition CI, and N be a finitely generated R-module with SuppRN= V（a） for some a ∈ W（I, j）. It is shown that if ExtR^j（N,HI^i,j（M）） ∈ S for all i 〈 t and all j 〈 t - i, then Ha^i（M） ∈ S for all i 〈 t. Let S be the class of all R-modules N with divmR N ≤ k, where k is an integer. It is proved that if Ha^i（M） ∈ S for all i 〈 t and all a ∈ W（I, j）, then HI^i,j（M） ∈ S for all i 〈 t. It follows that inf{i ： HI^i,j（M） S} = inf（inf{i ： Ha^i（M） S）： a ∈W（I,j）}.

关键词： extension functor local cohomology Serre subcategory

Sliding Wear Behavior of a Grey Cast Iron Surface Remelted by TIG

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journal of Materials Science & Technology 2009年第5期25卷 622-628页

作者： H.Mohamadzadeh H.Saghafian sh.Kheirandish Department of Metallurgy and Materials Engineering Iran University of Science and TechnologyTehranIran

The sliding wear behavior of a grey cast iron surface remelted by tungsten inert gas （TIG） was studied and compared with the unremelted one in the current work. To evaluate the wear behavior a Pin-on-Disk wear test machine was used. Pins which were prepared from the samples with the remelted layers of different thicknesses of 1.2, 1.8, 2.5 and 3 turn were worn on an AISID3 steel counterface having a hardness of 63HRC under the applied loads of 54, 76 and gg N at a constant sliding velocity of 0.45 m/s. Scanning electron microscopy （SEM） equipped with energy dispersive X-ray analysis （EDS） and X-ray diffraction （XRD） techniques were used to characterize worn surface and subsurface and also wear debris obtained from the wear tests under different test conditions. Results showed that surface remelted grey cast iron have better wear properties for all applied normal loads in comparison with unremelted ones. Microscopic studies on the worn surfaces and subsurfaces of samples revealed that dominant wear mechanism for surface remelted samples was mild oxidative, while it was severe for unremelted samples. Increasing remelted layer thickness and then forming grosser microstructure lead to a decline of wear properties, whereas lower thickness of remelted layer with finer microstructure due to having higher cooling rate through remelting process can withstand better against wear.

关键词： Grey cast Iron Surface remelted Tungsten inert gas (TIG) Wear