Materials Literature
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In the present paper we synthesized the Ni-W/MCM-41 catalyst with an impregnation method.The support MCM-41 mesoporous molecular sieve was synthesized by hydrothermal method.The catalysts and supports were characterized by X-ray powder diffraction (XRD) and UV-visible diffuse reflectance spectroscopy (UV-Vis/DRS).The…
Many repetitive sequences exist in the genome.Being able to regulate gene expression and physiological metabolism of chromosomes,they are thought to be of great biological importance.Owing to their special structures,repetitive sequences cannot be accurately sequenced by the shot gun method or primer walking,which are…
One new coordination polymer with the chemical formula [CoCu2L2·K2·1.5C2H5OH]n(H4L = 2-hydroxy-3-[(E)-({3-[(2-hydroxybenzoyl)amino]propyl}imino)methyl] benzoic acid) has been synthesized based on the slow diffusion method,and characterized by IR spectroscopy,thermalgravimetric and X-ray diffraction analysis.It crystal…
Aluminum flake powder has high diameter-thickness ratio,two-dimensional structure,good shielding effect and special by horn effect.It has been widely used in coating,top-grade car surface painting,ink and printing etc.industries.By ball milling process,while the other process conditions keep the same,aluminum flake po…
Two kinds of C/C composites with rough-lamination pyrocarbon matrix (RL) or smooth lamination (SL) pyrocarbon matrix were prepared. The sliding friction behaviors against 40Cr steel ring of the two C/C composites, a high strength graphite and a pyrocarbon solid material with SL structure used as compared material were…
Compared with the traditional side-chain polysiloxane liquid crystal,hydrogen bond self-assembly of the side-chain polysiloxane liquid crystal had its own particular advantages.The research progress of hydrogen bond self-assembly of the side-chain polysiloxane with the carboxyl/carboxyl system,carboxyl/pyridine system…
Objective To establish a fluorescence spectroscopy system and to investigate the phenomena of photobleaching during photodynamic reaction induced by hematoporphyrin monomethyl ether (HMME).Methods The photobleching process of HMME was monitored by optical multichannel analyzer. The concentration of HMME was 1 μg/ml an…
Based on the main raw materials including epoxy resin, toughener, reactive diluent, latent curing agent and electrically conductive particles, the novel electrically conductive adhesive with excellent comprehensive properties was prepared. Moreover, the curing reaction kinetics was further studied and the parameters w…
Nitric oxide (NO),with a variety of biological properties and functionalities such as anti-coagulant and anti-proliferation of cells,is an important signal molecule in the cardiovascular system.In this work,for improving the anti-platelet adhesion ability of the TiO2 film,a catalytic activity layer was built by grafti…
The high-temperature rupture strength and the bending creep behavior at 1 400 ℃ of two types of corundum-mullite pushers were investigated by three-point bending test.The results show that the pusher produced oversea which introduces andalusite as an aggregate has excellent microstructure.Corundum bonded by uniform mu…
TiO2 thin films with Ce-doping and La-doping were prepared by sol-gel method through the mixed reaction of tetrabutyt titanate with ceric sulfate crystal(and lanthanum sesquioxide).The photocatalytic experiment to the formaldehyde and the XRD structural analysis with Rietveld(whole-pattern fitting) method show that cr…
With density functional theory(DFT),the geometries and frequencies of NinC(n=1-6) clusters have been calculated.The equilibrium geometries and spin multiplicities of the ground-state structures have been determined.The ground-state structures of NinC(n=1-6) clusters are not in the highest symmetry.The geometric struct…
This article briefly discussed the characteristics, the inseparable relationship with modern industrial construction, and the development trend of heavy duty anticorrosive coatings. Their development prospects would be bright.
The poly(N-(p-carboxylphenyl)methacrylamide-co-N-phenylmaleimide) was copolymerized with monomer N-(p-carboxylphenyl)methacrylamide(NCMA) and N-phenylmaleimide(NPMI). To apply this copolymer as the matrix resin with photosensitizer and solvents to fomulate a novel thermostable UV positive photoresist.The photoresist f…
Optimization of microstructure for new generation advanced high strength steels(AHSS ) for automobiles was briefly reviewed.Two different heat treatments(quenching partitioning austempering/QPA and quenching partitioning tempering/QPT) have been investigated to obtain optimal microstructures,which are made up of marte…
In the form of questionnaire,through the project of searching the markets of denim wear in Guangdong province,the article analyzed the consumer preferences in current denim wear market,the style needs,pricing,brand building and product development,which can provide a theoretical basis for Guangdong denim industry.
The Y_2O_3:Yb,Er precursors of single homogeneous phase are prepared by the methods of sol-gel combustion synthesis and coprecipitation method.The single Y_2O_2S:Yb,Er powders are obtained by conventional flux method.The post-processing treatment of flux method is improved.The phase composition,chemical bond compositi…
The computation of thermodynamic properties and determination of kinetic parameters are very important for modeling and simulation of industrial continuous poly(ethylene terephthalate)(PET) plant.The elementary reactions involved in the esterification process include the reactions of esterification,polycondensation,hy…
The silicone modified polyether elastomer is prepared by polycondensation two-allyl polyether and teramethyldisiloxane and by termination with vinyl triethoxysilane. The target copolymer was characterized and analyzed by 1H NMR and DSC. The molecular weight of copolymer was analyzed by GPC, and the properties of cured…
In this paper,means and method used for characterizing the interface behavior of single fiber composite are elaborated comprehensively from three aspects:mesoscopic-mechanical test,mesoscopic-mechanical models and numerical simulation.Mesoscopic-mechanical test establishes the basis for mesoscopic-mechanical models an…