Materials Literature
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The NOx from the coal combustion is the unignorable air pollution sopurce.The paper summarized the reaction mechanism of H2 elective catalytic reduction(H2-SCR)to eliminate NOx under the rich oxygen conditions.The paper classified and summarized the reaction mechanism of the NOx in the H2-SCH reaction processing.
The emulsion type pressure sensitive adhesive(PSA) for protective film was prepared by pre-emulsified semi-continuous polymerization,the influences of some factors(such as monomer,emulsifier,initiator,buffering agent,cross linker and other factors) were discussed on increasing range of emulsion type PSA peeling streng…
The influence of the addition level of sulfur in sulfur/peroxide curing system on the properties of NBR/CM blend was investigated.The results showed that,as the addition level of sulfur increased,the crosslink density of NBR/CM blend increased,and the curing rate increased at first and then decreased;the modulus at 10…
To further investigate the launching process of intercepting plate in active electromagnetic armor protective system,we introduced an intercepting plate and the physical structure model which was based on the principle of electromagnetic launch.Then finite element analytic software Ansoft was used to simulate the endu…
Copper products play an important part in electric power、automobile、building、communication.The article introduces the copper products classification and performance characteristics as well as copper scrap reproduction.
The click chemistry reaction was used to solve the problem to remove excess PEG from graft chitosan-mPEG copolymers for synthesis.A series of graft chitosan-mPEG copolymers were first synthesized via click chemistry reaction between azido-end monomethoxypolyethylene glycol and alkynyl chitosans that were synthesized b…
In the paper,it is introduced the force analysis of tungsten carbide roll collars used on finishing mill group in high speed wire rod,and pointed out the effects of rolling stress,thermal stress,and assembly stress in the process of fragmentation for roll collars.It is got that fair use of roll collars is the key to q…
Synthesized isoamyl acetate catalyzed by TiSiW12O40/TiO2,and inentifed that the best conditions were:the molar ratio of alcohol to acid was 1.2:1,the amount of catalyst was 1.25 g,the return time of 1.5h,the maximum ester yield of 86.0%.It was showed that TiSiW12O40/TiO2 had good catalytic activity.
The pretreating effects of bagasse sulfate pulp with xylanase before beating on beating energy consumption,fiber morphology,paper properties was researched in this paper.The effects of different dosage of enzyme on energy consumption and the pulping performance were studied.The results showed that pretreatment with xy…
A new approach to menstruate Hydrogen Peroxide(H2O2) has been developed.Chitosan(CS) is chosen for dispersing multi-wall carbon nanotubes(MWNT) to form a stable CS-MWNT composite.This composite is first coated on the surface of glassy carbon electrode(GCE).Then nano-Au is electro-deposited on the CS-MWNT/GCE surface a…
Fe-substituted AlPO-5 zeolite(FeAlPO-5 catalyst) samples with different Fe contents were prepared by the hydrothermal method and used in catalytic reduction of N2O with CH4,exhibiting good low-temperature activity.The AlPO-5 and FeAlPO-5 samples were characterized by N2 physisorption,X-ray diffraction,and UV-visible s…
AIM:To study intravenous transplantation of human mesenchymal stem cells (hMSCs) on the life span and pathological change of SOD1-G93A amyotrophic lateral sclerosis (ALS) mice. METHODS:hMSCs were cultured and expanded from heparinized bone marrow cells from healthy donors and the purity and features were identified wi…
Polyurethane elastomer foams(PUEF)with long compressive stress-strain flat were prepared.Influences of the hard segment content,crosslinking degree and density on the compressive stress-strain property,compressive stress relaxation and tensile property of PUEF were studied.It was indicated that the compressive stress-…
Utilizing the reaction between Ti and LaB_6,titanium matrix composite(TMC) plate reinforced with TiB and La_2O_3 was prepared by casting trice and hot-forging,its transformation temperature measured was 1 045℃.The TMC was rolled at 1 010℃,then air-cooled.The microstructure and fracture surfaces were studied by OM and…
The epoxidation of acrylonitrile-butadiene rubber (NBR) with tert-butyl hydroperoxide and molybdenum oxide was carried out in the solventless reactive processing equipment of HAAKE mixer. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectra confirmed the existence of epoxy group in the resulting…
The emulsion polymerization was used to manufacture PBCA-NP loaded with Fibrauretin.The process was optimized by L9(34) orthogonal design test with morphology,particle size,drug loading and embedding ratio of nanoparticles as the standard;at the same time,the anti-infection effect was viewed in mice infected with S.au…
In this paper,the recent developments of inorganic material supported Mn(Salen)catalysts for epoxidation of olefins are reviewed based on the immobilization methods and varieties of the carrier.Particular attention is focused on the catalytic activity and value of enantioselectivity of Mn(Salen)catalysts supported on…
Aim:To prepare vinblastine-loaded PCL-PEG6000-PCL nanoparticles,and to study their physicochemical properties and in vitro antitumor activity.Methods:PCL-PEG6000-PCL triblock copolymer was prepared by ring-opening polymerization,and vinblastine-loaded PCL-PEG6000-PCL nanoparticles was prepared by coprecipitation.The m…
OBJECTIVE To establish a method for testing bacterial endotoxin of Brucea jananica oil injection.METHODS According to the Bacterial Endotoxin Test approved by Chinese Pharmacopoeia 2005 edition.RESULTS Brucea jananica oil injection did not interfere with bacterial endotoxin test when it is diluted 8 times.CONCLUSION I…
In order to get the characteristic parameter of gas-solution interface in magnetic field,measurement of deformation was done by the method based on mirror image combined with the structure illumination.The quantitative results of surface deformation were calculated from the phase unwrapping of gray matric and 3D recon…