Materials Literature
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By using DFT method of quantum chemistry,the BNCP molecule structure parameters were calculated.The BNCP structural characteristic,performance of spectrum and sensitivity have been analyzed.The result showed that the nucleophilic center was N,O atom in NH_3和ClO_4,the electronic center was N atom in NO_2 and Cl,Co atom…
The new model 2-Reactor PET technology of Huitong Company was introduced.The process and equipment structure of esterification/pre-polymerization new model reactor was explained emphasisly.The characteristics of the new model 2-Reactor PET plant were summerized.
Aiming at the characteristic of the sinter flue gas,the active semi-coke desulfurization process was brought forward.The properties of semi-coke were analyzed,and desulfurization mechanism was introduced.The effects of modified semi-coke E3 on desulfurization effect was discussed,and active semi-coke ammonia and therm…
The oxygen anionic polyamide profiled fiber was produced through melting spinning process by adding oxygen anionic powder.The main properties of the profiled fiber were tested.The results showed that at the same content of oxygen anionic powder,the larger the degree of the fiber profile,the larger the specific surface…
Commercial experiment on producing PAN - base large - tow precursor was conducted with the process of AN - MA - IA ternary polymerization and NaSCN one - step wet spinning,based on which the processing conditions were determined to form commercial production technology.Comparing with imported products,the metal impuri…
Objective To evaluate the biocompatibility of decellularized vascular scaffold prepared with Triton X-100 and trypsin.Methods In vitro and in vivo tests were performed to evaluate the biocompatibility of the decellularized vascular scaffold.The in vitro tests included direct-contact method and MTT assay,and the in viv…
The inhibition effects of vanadium substituted Dawson-and Keggin-type heteropoly acids( W,P) on the polymerization of methyl methacrylate( MMA) were investigated by differential scanning calorimetry ( DSC) . The results show that in terms of the same heteropoly acid,the rate of polymerization of MMA decreases continuo…
Gaseous detonation diffraction in abruptly expanded tube and gradually expanded tubes was numerically investigated at different filling and expanding angles.Detonation tube diameter and critical tube diameter are vital to the successful diffraction.Interaction of the wall reflected shock and the detonation wave produc…
Objective To investigate effectiveness of human umbilical cord blood mesenchymal stem cells (UCB-MSCs) labeled with superparamagnetic iron oxide (SPIO)and its safety.Methods UCB-MSCs were isolated and cultured by combination of gradient centrifugation and direct adherent method. UCB-MSCs were labeled with different co…
The effect of long-term aging below 595 ℃ on mechanical properties and microstructural evolution,as well as the mechanism of embrittlement of M152 heat resistant steel were investigated experimentally by means of optical micrograph,TEM and mechanical property tests.The result shows that strength would be reduced gradu…
Adopting the chemical separation techniques,pomelo peel was used as a raw material to extract the cellulose. To get cellulose of high adsorption ability on heavy mental ions,the extraction condition of cellulose from pomelo peel were studied systematically in this paper. The effects of NaOH concentration,H2O2 concentr…
Based on the Erickson-Leslie continuum theory,the hybrid aligned nematic inplane switching (HAN-IPS) liquid crystal cell is investigated with considering the backflow effect.The relation of liquid crystal director and flow velocity is obtained under the condition of strong surface anchoring.The results of computer sim…
Recent development scenario of resins and additives,processing technologies and machines for blow molded plastics containers were reviewed,including innovative brand resins,polymer blends and copolymers;novel additives;up-to-date injection-blow molding machines,injection-stretch-blow molding machines,extrusion-blow mo…
Bubble chamber structure of section,static compression property and application performance of expanded polyolefin(EPO),EPS and EPE foam were compared.It was shown by analysis of stress-strain curve that the deformation of EPO was divided into elasticity section,plastic yield platform section and steep rising stress s…
Objective:To establish HPLC analytical method for related substances,polymer and assay of Biapenem for injection and compare the quality study of 4 batches.Methods:HPLC method for assay and related substances test: Column: Phenomenex LunaC18,Mobile phase: 0.02mol/l Sodium acetate-acetonitrile(97:3),Wavelength: 220nm.H…
In this paper,the structure and aberration of a hybrid refractive-diffractive achromatic Liszt microscope objective are examined theoretically using the ZEMAX software.Its axial aberration is corrected by distribution of power of hybrid refractive-diffractive lenses.The spherical aberration and coma are corrected thro…
Reeling cocoon number per thread for automatic silk reeling machine was controled by denier control system of raw silk, but control system are effected by technology equipment and environment etc sometimes reeling cocoon number per thread changed abnormally therefor reeling cocoon number per thread must be scientificl…
2,5-Dicyano-1,4-bis2′-(4′-benzo-12-crown-4) vinylbenzene as two-photon fluorescence sensor 1 was synthesized,and its structure was characterized by IR,MS and elemental analyses.Similar selectivity of sensor 1 toward metal ions was found in one-photon excited fluorescence(OPEF) and two-photon excited fluo-rescence(TPEF…
Zinc ferrite precursors was prepared by coprecipitation method under the ultrasonic radiation in the paper,then the active components of desulferizer zinc ferrite was prepared by calcinations under microwave irradiation.The effect of temperature and time of calcinations on the crystal phase and the granularity of zinc…
The copper deposit was prepared by pulse electroplating process.The effects of current density,pulse frequency and duty cycle on the copper deposit texture were studied.The texture and morphology of copper deposit were analyzed by X-ray diffraction(XRD) and scanning electron microscopy(SEM),respectively.The test resul…