Materials Literature
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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…
The bullet impact test of the HE/IE charging structure was simulated by using the finite element software AUTODYN.The results showed that in-out charging structure which the outer layer was insensitive explosive TATB and the inner layer was high explosive PBX-9404 could reduce the explosive bullet impact sensitivity,a…
Phytoplankton population in the middle reaches of Heilongjiang River was investigated in spring(May) and summer(July).The phytoplankton assemblage was composed of 80 species in total,belonging to eight taxonomic groups.Bacillariophyta were represented by the highest number of taxa(36),followed by Chlorophyta(19),Cyano…
The microstructure and mechanical properties of Ti-49.8Ni-1.0Co (at% ) shape memory alloy (SMA) were investigated by optical microscopy,X-ray diffraction and tensile test.The results show that the microstructure consists of fibrous and equi-axed grains for Ti-49.8Ni-1.0Co alloy wire annealed at 400 ℃ and 600 ℃ ,respec…
Transition metal nanoparticles (MNP) stabilized in green solvents,i.e.,ionic liquids (ILs) and water,have great potential for use in catalysis.These new catalytic systems are more efficient and greener while easy segregation of substances depends on a two-phase design.By an appropriate design of the metal nanoparticle…
Failure causes of φ127 mm G105 drilling pipe were investigated through mechanical property test,optical morphologies and fracture analysis with consideration of loading.Results show that the decarburized layer caused by improper heat treatment is the failure reason of the drilling pipe.Under the effect of alternating…
O-methyl-isourea acetate was synthesized by using O-methyl-isourea hydrogen sulphate,sodium hydroxide,sodium acetate and methanol as raw materials.The effect of the amount of raw materials,reaction time and the choice of solven of recrystallization were studied.Under the optimal conditions,the yield,and the purity of…
Ti,Al,Nb ternary intermetallics were prepeared by sintering of multi layers of pure metal.The rnicrosturcture, phase type and phase component were studied by BEI,XRD and EDS.The phase evolution during the sintering process was studied,the results show that both multi and single phase can be obtained by different sinte…
The development of nanometer materials, which possess the unique physical and chemical properties, will take a new opportunty for the investigation of subjects such as physics, chemistry, materials, biology and pharmaceutical et al. The properties and preparation technologies and applications were summarized in this p…
Polyaniline coatings were electrodeposited on 304 stainless steel via cyclic voltammmetric and constant-current routes in synthe-sized solution containing H2SO4.The morphologies of the coat-ings were observed by using a scanning electron microscope.The corrosion resistance and electrochemical behavior of the coatings…
The three-dimensionally ordered net-work PAMAM-Au nanocomposites were prepared by reduction of HAuCl4 with NaBH4 in the presence of the first generation polyamidoamine(G1 PAMAM) as dispersant reagent.The influences of reaction time,molar ratio of HAuCl4 to PAMAM,pH and the amount of reducing reagent on the formation o…