Materials Literature
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In the formation of high-velocity compaction,the experiments have proven that a plurality of low-energy impacts can achieve or even surpass the density of a single high-energy impact.According to the deformation characteristics of the metal powder in two high-velocity compaction and formation,we suppose that the pre-c…
Solid state reaction and hydrothermal methods were employed to prepare bismuth sodium titanate(Bi0.5Na0.5TiO3,BNT) ceramic powder.The phases,granularity,microstructure of the ceramic powder and ceramic were investigated by XRD,SEM.The linear contractive rate and the relative density of the ceramics sintered at differe…
The ceramic-lined composite pipes are prepared by using the centrifugal and high-temperature self-propagating technique. The organizational structure, phase composition and constituents of the ceramic coating are analyzed with the scanning electron microscopy and EDS. The effects of the additive SiO_2 on the porosity…
Acetylenic RAs is a kind of important drug for treating cancer.In this paper,a novel acetylenic retinoids was synthesized and a directly copper-free Sonogashira coupling between iodoaryl acid and phenylacetylene was developed.In the absence of Cu(Ⅰ),the catalytic coupling of haloaryl carboxylic acids or unactivated ar…
The effect of surface tension on the behavior of a laser-induced cavitation bubble is investigated experimentally by means of a fiber-coupled optical beam deflection(OBD)technique.The maximum and minimum bubble radii as well as the oscillation times for the first two oscillation cycle are determined according to the c…
The thin films of tungsten doped vanadium oxides were deposited on SiO2 glass,float glass and Si(100) by direct current reactive magnetron sputtering and then annealed in vacuum.The phase composition,surface morphology and transmittance were detected by X–ray diffractometer,atomic force microscopy and infrared spectro…
The effect of EDTA+poly-lysine and chlorine dioxide(ClO2) treatments on storage characteristics and quality of fresh cut pineapple stored at room temperature. The results showed that treatment with ClO2 (0.005%) significantly inhibited the browning process through reduce the total polyphenol content in storage, retard…
We investigated self-consistent-variation ground states of the EB polymer with various values of structure parameter V_(4,0) from 1. 8 to 35. 8 eV in the framework of the extended Ginder-Epstein model, and estimated pressure in the polymer by ring-torsion angles. Relations between estimated pressure and V_(4,0),the ri…
Aim To study the sound field of sonochemical reactor which radiates sound from the side wall of the reactor.Methods Based on the acoustic wave eqation in three-dimensional,the sound pressure in the reactor was sought according to the acoustic boundary conditoin of the reactor.Results The sound pressure is superposed b…
Experimentally studied was the SNCR(selective non-catalytic reduction) denitrification process on a self-developed test rig with ammonia serving as a reducing agent.Its simulation was performed by using chemical reaction dynamics software Chemkin 4.1.It has been found through tests that the inner spray-in mode by use…
The characteristics of process for the production of XP125-A-1 PVC paste resins were introduced.The common problems occurred during the processing of artificial leather,floor leather,conveyance belts and plastic toy balls were summarized,and the corresponding measures were proposed.
Multiwalled carbon nanotube(MWCNT)/epoxy composites are prepared,and the characteristics and morphological properties are studied.Scanning electron microscopy microphotographs show that MWCNTs are dispersed on the nanoscale in the epoxy resin.X-ray diffraction(XRD) test results showed that the composite materials for…
The side-poly(urethane-imide)(PUI) containing dye chromophore was synthesized.The PUI was characterized by infrared spectrum(FT-IR),differential scanning calorimeter(DSC) and thermal gravimetric analysis(TGA).The thermo-optic coefficients of polymer solution by using Abbe refractometer were demonstrated at natural lig…
The chain extension of poly(ethylene terephthalate)(PET) with a tetra functional monomer,pyromellitic dianhydride(PMDA),has been performed by varying the chain-extender amount to improve the melt strength.The reaction can increase the molecular weight of PET,while leading to chain-extension and branching.The results o…
A new non-magnetic controlled expansion alloy Ni-34Mo-0.5Si-Zr were designed.The expansion coefficient,The permeaability,The physical properties and The mechanical properties of Ni-34Mo-0.5Si-Zr alloy has been studied.The results indicated that Ni-34Mo-0.5Si-Zr alloy is a fine joining materials to ceranic or glass.
The influence of reactor temperature,ratio of oxygen to methane and stuff flux under no catalyze and normal pressure condition on carbon deposit and syngas from methane by partial oxidation was studied.The reaction mechanism of the production of syngas from methane is deduced after analyzing the influence of reactor t…
Objective:To prepare tetradrine(Tet)-loaded nanoparticles with di-block copolymer mPEG-PCL,and evaluate their properties.Methods:mPEG-PCL was synthesized by ring-opening polymerization method and the nanoperticles were prepared by the optimized o/w emulsion-evaporation method.Chemical structure and molecular weight of…
Objective To investigate the age-related expression of 8-oxo-7,8-dihydroguanine (8-oxo-dG) in the mouse hippocampus of senescence-accelerated mice prone 8(SAMP8). Methods Randomly selected 1-, 4-, 8- and 12-month old SAMP8 and the age-matched control strain senescence-accelerated mice resistant 1 (SAMR1), with 6 mice…
The characteristics of HP295 welding gas vessel steel produced by Liugang were introduced from the respects of composition design, production process, mechanical property, metallographic structure and application.
The influence of an organic phosphorus flame-retardant(CJ1002) on the mechanical properties and the flame-retardancy of glass fiber(20 wt%) reinforced polybutylece terephthalate(PBT) was investigated.When the content of the CJ1002 was 18 wt%,the tensile strength and flexural strength of the composite changed a little,…