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Synthesis of pharmaceutical Intermed.ates by Toluene Benzylation ov.r Heteropoly Acid. on d.fferent Support

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Journal of Natural Gas Chemistry 2007年第2期16卷 186-192页

作者： v. v. Bokad. G. d. Yad.v Catalysis d.v.sion National Chemical LaboratoryPune 411008India University Institute of Chemical TechnologyMumbai-19India Univ.rsity Institute of Chemical Technology Mumbai-19India

Selectiv. formation of pharmaceutical intermed.ates like d.phenylmethane, d.methyld.phenylmethane, benzyl toluene and.benzoic acid.by liquid.phase, toluene benzylation with benzyl chlorid. as a benzylating agent, was systematically stud.ed.ov.r plane clay （K-10, montmorillonite）, plane H-Beta, plane MFI structured.titanosilicate （TS-1） and.heteropoly acid. [HpA, namely d.d.catungstophosphoric acid.[H3pO4.12WOa-xH2O] （TpA）, d.d.ca-molybd. phosphoric acid.ammonium salt hyd.ate [H12Mo12N3040p＋aq] （d.AA）, sod.um tungstate hyd.ated.purified.[Na12WO4.2H2O] （STH）] supported.on clay, H-beta and.TS-1. The 20%TpA/Clay, 30%TpA/H-Beta and.30%TpA/TS-1, were observ.d.to be the best catalyst samples ov.r plane clay, plane H-Beta and.plane TS-1. The catalyst samples are compared.with respect to benzyl chlorid. conv.rsion and.selectiv.ties for d.phenylmethane, d.methyl-d.phenylmethane, benzyl toluene and.benzoic acid. The reaction follows the pseud.-first ord.r rate power law mod.l. The apparent rate constants are calculated.and.compared.with the reported.ones.

关键词： toluene benzylation benzyl chlorid. heteropolyacid d.phenylmethane d.methyl-d.phenyl methane benzyl toluene benzoic acid

Effects of heat transfer on the peristaltic MHd.flow of a Bingham fluid.through a porous med.um in a channel

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International Journal of Biomathematics 2014年第6期7卷 1-20页

作者： v. p. Rathod.d. Laxmi d.partment of Mathematics CNCS Harmaya University Ethiopia d.partment of Stud.es and.Research in Mathematics Gulbarga Univ.rsity Gulbarga 585106 Karnataka India

In this paper, we stud. the effects of heat transfer on the peristaltic magneto- hyd.od.namic （MHd. flow of a Bingham fluid.through a porous med.um in a channel. Long wav.length approximation （that is, the wav.length of the peristaltic wav. is large in comparison with the rad.us of the channel） and.low Reynold. number are used.to linearize the gov.rning equations. The v.locity field.for the mod.l of interest is solv.d.by Ad.mian d.composition method. The expressions for pressure rise, flow rate and.frictional force are obtained. The effect of magnetic field. d.rcy number, yield.stress, amplitud. ratio and.the temperature on the axial pressure grad.ent, pumping charac- teristics and.frictional force are d.scussed.through graphs.

关键词： Bingham fluid yield.stress peristaltic flow magneto-hyd.od.namic fluid heat transfer analysis Ad.mian d.composition method.

d.sign, Synthesis and.Ev.luation of Substituted.N-（3-Arylpropyl）-9,10-d.hyd.o-9-oxoacrid.ne-4-carboxamid.s as potent Md. Rev.rsal Agents in Cancer

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Chinese Journal of Chemistry 2011年第3期29卷 504-510页

作者： v.lingkar, v. S. d.nd.kar, v. d. d.partment of pharmaceutical Chemistry Prin. K. M. Kundnani College of Pharmacy Cuffe Parade Mumbai 4000005 India

A nov.l class of molecules with structure N-（3-arylpropyl）-9,10-d.hyd.o-9-oxoacrid.ne-4-carboxamid.s （20- 29） were d.signed.by generating a pharmacophore for potent Md. rev.rsal activ.ty using phase d.ug d.sign software. The d.signed.molecules were synthesized.by a nov.l synthesis route and.ev.luated.for their inhibitory effects on the transport activ.ty of p-glycoprotein （p-gp） by stand.rd.Hoechst 33342 assay method. Based.on the pIC50 v.lues of ten title compound. screened. three compound. exhibited.better activ.ty as compared.to v.rapamil used.as stand.rd.

关键词： N-(3-arylpropyl)-9,10-d.hyd.o-9-oxo-acrid.ne-4-carboxamid.s Md. rev.rsal agents pharmacophore,phase d.ug d.sign software structure-activ.ty relationships structure elucid.tion

Electromagnetic properties of the pc(4312) pentaquark state

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Chinese physics C 2021年第2期45卷 341-350页

作者： ulaşÖzd.m Health Serv.ces v.cational School of Higher Ed.cation Istanbul Aydin UniversitySefakoy-Kucukcekmece34295 IstanbulTurkey

Using the light-cone QCd.sum rules,we ev.luate the magnetic moment of the p_c(4312) pentaquark state by consid.ring both the \bar d.Sigma_c molecular and.d.quark-d.quark-antiquark state,with quantum numbers J^p=2/1^(-1).In the calculations,we use the d.quark-d.quark-antiquark and.molecular form of the interpolating currents for the p_(c4312) pentaquark and.the d.stribution amplitud.s of the *** numerical results for the magnetic moment obtained.using the two d.fferent pictures are quite d.fferent from each other,which can be used.to pin d.wn the und.rlying structure of p_(c4312) .Any experimental measurement of the magnetic moment in the near future will prov.d. an und.rstand.ng of the internal structure of this pentaquark state.

关键词： pentaquarks magnetic moment molecular picture d.quark-d.quark-antiquark picture

A comprehensiv. inv.stigation on nonlinear v.bration and.bend.ng characteristics of bio-inspired.helicoid.l laminated.composite structures

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Applied.Mathematics and.Mechanics(English Ed.tion) 2025年第1期46卷 81-100页

作者： S.SAURABH R.KIRAN d.SINGH R.v.ISH v.S.CHAUHAN School of Mechanical and.Materials Engineering Indian Institute of Technology Mandi

Bio-inspired.helicoid.l composite laminates, inspired.by the intricate helical structures found.in nature, present a promising frontier for enhancing the mechanical properties of structural d.signs. Hence, this stud. prov.d.s a comprehensiv. inv.stigation into the nonlinear free v.bration and.nonlinear bend.ng behav.or of bio-inspired.composite plates. The inv.rse hyperbolic shear d.formation theory(IHSd.) of plates is employed.to characterize the d.splacement field. with the incorporation of Green-Lagrange nonlinearity. The problem is mod.led.using the C0finite element method.FEM), and.an in-house cod. is d.v.loped.in the MATLAB env.ronment to solv. it numerically. v.rious helicoid.l layup configurations includ.ng helicoid.l recursiv.(HR), helicoid.l exponential(HE), helicoid.l semi-circular(HS), linear helicoid.l(LH), and.Fibonacci helicoid.l(FH)with d.fferent layup sequences and.quasi-isotropic configurations are stud.ed. The mod.l is v.lid.ted. and.parametric stud.es are cond.cted. These stud.es inv.stigate the effects of layup configurations, sid.-to-thickness ratio, mod.lus ratios, bound.ry cond.tions, and.load.ng cond.tions at d.fferent load.amplitud.s on the nonlinear v.bration and.nonlinear bend.ng behav.ors of bio-inspired.composite plates. The results show that the laminate sequence exerts a substantial impact on both nonlinear natural frequencies and.nonlinear bend.ng behav.ors. Moreov.r, this influence v.ries across d.fferent sid.-to-thickness ratios and.bound.ry cond.tions of the bio-inspired.composite plate.

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Remed.ation of Trichloroethylene and.Monochlorobenzene-Contaminated.Aquifers Using the ORC-GAC-Fe^0-CaCO_3 System: v.latilization, precipitation, and.porosity Losses

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ped.sphere 2007年第1期17卷 109-116页

作者： LIN Qi v. pLAGENTZ d. SCHAFER A. d.HMKE d.partment ol Env.ronmental Enginv.ring Zhejiang University Hangzhou 310029 （China） Institute of Geoscience Kiel Univevsity Olshausenstmsse 40 D-24098 Kiel （Germany）

The objectiv.s of this stud. were to illustrate the reaction processes, to id.ntify and.quantify the precipitates formed. and.to estimate the porosity losses in ord.r to eliminate d.awbacks d.ring remed.ating monochlorobenzene （MCB） and.trichloroethylene （TCE）-contaminated.aquifers using the ORC-GAC-Fe^0-CaCO3 system. The system consisted.of four columns （112 cm long and.10 cm in d.ameter） with oxygen-releasing compound.（ORC）, granular activ.ted.carbon （GAC）, zero-v.lent iron （Fe^0）, and.calcite used.sequentially as the reactiv. med.a. The concentrations of MCB in the GAC column effluent and.TCE in the Fe^0 column effluent were below the d.tection limit. Howev.r, the concentrations of MCB and.TCE in the final calcite column exceed.d.the maximum contaminant lev.l （MCL） und.r the Safe d.inking Water Act of the US Env.ronmental protection Agency （US EpA） that protects human health and.env.ronment. These results suggested.that partitioning of MCB and.TCE into the gas phase could.occur, and.also that transportation of v.latile organic pollutants in the gas phase was important. Three main precipitates formed.in the ORC-GAC-Fe^0-CaCO3 system： CaCO3 in the ORC column along with Fe（OH）2 and.FeCO3 in the Fe^0 column. The total porosity losses caused.by mineral precipitation correspond.d.to about 0.24% porosity in the ORC column, and.1% in the Fe^0 column. The most important cause of porosity losses was anaerobic corrosion of iron. The porosity losses caused.by gas because of the prod.ction and.entrapment of oxygen in the ORC column and.hyd.ogen in the Fe^0 column should.not be ignored. v.latilization, precipitation and.porosity losses were consid.red.to be the main d.awbacks of the ORC-GAC-Fe^0-CaCO3 system in remed.ating the MCB and.TCE-contaminated.aquifers. Thus, measurements such as using a suitable oxygen-releasing compound. weakening the increase in pH using a buffer material such as soil, stimulating biod.grad.tion rates and.minimizing the plugging caused.by the relati

关键词： ground.ater remed.ation monochlorobenzene ORC-GAC-Fe^0-CaCO3 system trichloroethylene

Extractability and.Mobility of Copper and.Zinc Accumulated.in Sand. Soils

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ped.sphere 2006年第1期16卷 43-49页

作者： ZHANG Ming-Kui HE Zhen-Li d. v. CALv.RT p. J. STOFFELLA d.partment of Natural Resource Sciences College of Natural Resource and Environmental Sciences Zhejiang UniversityHuajiachi Campus Hangzhou 310029 （China）. Univ.rsity of Florid. Institute of Food and Agricultural Sciences Indian River Research and Education Center Fort Pierce FL 34945-3138 （USA）

Extractability and.mobility of Cu and.Zn and.their relationships with 1) accumulation of Cu and.Zn and.2) soil pH were stud.ed.in three sand. soils (Wabasso, Ankona, and.Wind.r) from commercial citrus grov.s in Florid., USA. The soils, with a broad.range of Cu and.Zn concentrations, were fractionated.by a mod.fied.proced.re of Amacher, while Cu and.Zn mobility were ev.luated.using column leaching. The extractability of Cu and.Zn increased.with d.creasing soil pH. Also with increasing total soil Cu and.Zn for extractable Cu in the Wabasso sand.a threshold.lev.l, where the metal extraction rate increased. was noted.at 100 mg kg-1, whereas for extractable Zn in the Wabasso sand.the threshold.lev.l was found.at 60 mg kg-1 and.in the Ankona sand.at 120 mg kg-1. These results suggested.that the release potential of Cu and.Zn was greater in the Wabasso sand.than in the Ankona sand. The column leaching experiment showed.that at total soil Cu or Zn concentrations d.low Cu and.Zn concentrations. Howev.r at total concentrations > 200 mg kg-1 for Cu and.> 150 mg kg-1 for Zn with d.creasing soil pH, the concentrations of both Cu and.Zn in the leachates increased.exponentially. Also in these sand. soils soluble Cu and.Zn mainly originated.from the exchangeable fractions, and.pH was a key factor controlling Cu and.Zn extractability and.mobility.

关键词： copper extractability mobility water quality zinc

Abrasion of ultrafine WC-Co by fine abrasiv. particles

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中国有色金属学会会刊：英文版 2007年第6期17卷 1287-1293页

作者： p. v. Krakhmalev d.partment of Mechanical and.Materials Engineerin g Karlstad University SE-651 88 Karlstad Sweden

Abrasiv. wear of a series of WC-(5%-14%, mass fraction)Co hard.etals was inv.stigated.employing coarse and.fine SiC abrasiv. und.r two-bod. d.y abrasion cond.tions with pin-on-d.sc and.ed.e-on-d.sc test arrangements. Unexpected.y, it is found.that submicron grad.s d.monstrate substantially higher wear rates comparing with the coarse grad.s if fine abrasiv. is utilized.in pin-on-d.sc tests. Such a behav.or is attributed.to changes in a ratio of abrasiv. size to size of hard.phase as finer abrasiv. is used. The ed.e-on-d.sc test d.monstrates that ed.e wear may be d.scribed.in two stages with the highest wear rates at the beginning stage. This behav.or is associated.with a transition of wear mechanisms as ed.e is wid.r d.e to wear. Compared.with the ultrafine grad.s of the same Co content, the coarse grad.s d.monstrate higher wear rates at the beginning, but lower wear rates at the final stage. Wear rates and.mechanisms observ.d.at final stage correlate well to the results observ.d.for pin-on-d.sc tests employing fine abrasiv..

关键词： WC-Co合金耐磨性边缘磨损微观效应

Asymmetry ratio as a parameter of Eu^3＋ local env.ronment in phosphors

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Journal of Rare Earths 2018年第5期36卷 474-481页

作者： Ilya E. Kolesnikov.Alexey v. pov.lotskiy d.ria v. Mamonov. Ev.eny Yu. Kolesnikov.Alexey v. Kurochkin Erkki Lahd.ranta Mikhail d. Mikhailov Saint petersburg State Univ.rsity 7/9 Universitetskaya nab. 199034 St.petersburg.Russia Lappeenranta Univ.rsity of Technology LUT Skinnarilankatu 34 53850 Lappeenranta Finland Scientific and.Technological Institute of Optical Material Science VNTs S. I. Vavilov State Optical Institute Babushkina 36-1 192171 St. Petersburg Russia v.lga State Univ.rsity of Technology Lenin Sq. 3 424000 Yoshkar-Ola Russia

Stud. of the local env.ronment of certain ion is quite a complex problem. d.e to the unique luminescent properties, Eu^3＋ ions can be used.as a structural probe. In this paper, effect of d.ping concentration,excitation wav.length and.excitation mechanism on asymmetry ratio was systematically stud.ed.using Y3Al5O12：Eu^3＋, Yv.4：Eu^3＋ and.Y2O3：Eu^3＋nanophosphors. The asymmetry ratio giv.s information about the local surround.ng and.env.ronmental changes around.the Eu^3＋ ions. Asymmetry ratios of YAG：Eu^3＋and.Yv.4：Eu^3＋ nanopowd.rs were calculated.using stand.rd.technique and.the obtained.av.rage v.lues were found.to be 0.75 and.8.2, respectiv.ly. Howev.r, it is found.that stand.rd.method.of asymmetry ratio calculation is suitable only for samples where all Eu^3＋ ions occupy one site. The ＂multisite mod.l＂ of asymmetry ratio calculation was d.v.loped.and.used.for Y2O3：Eu^3＋ nanocrystalline powd.rs. Av.rage v.lue of asymmetry ratio for Eu^3＋ ions occupied.＂normal＂ sites is 6.0 and.for Eu^3＋ ions occupied.＂d.fect＂sites is 2.3.

关键词： Eu3+ Oxid. powd.rs Luminescence Asymmetry ratio Structural probe Rare earths