Materials Literature
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Objective To compare the effectiveness and feasibility of allograft chondrocytes embedded in matrigel gel and chitosan/glycerophosphate gel(C/GP) scaffolds for articular cartilage repair in rabbits.Methods The complexes of seeding of chondrocytes encapsulated in collagen gel into matrigel gel and C/GP scaffolds were c…
Making use of self-made micro-arc oxidation electrical source,the electrolyte composition,electrical parameter and oxidation time influences on AZ91D magnesium alloy oxidation film quality were discussed,the results show that electrolyte composition can decide film components and performance;and the corrosion resistan…
The composite oxide of La0.7Ca0.3Fe0.25Co0.75O3 nanocrystal has been synthesized by glycine-nitrate combustion method.A novel nanocomposite photocatalyst PMo12/PPy/La0.7Ca0.3Fe0.25Co0.75O3 has been successfully prepared first using a chemical oxidation method with(NH4)2S2O8 as an oxidant to form PPy/La0.7Ca0.3Fe0.25Co…
采用电聚合的方法制备了聚对氨基苯磺酸修饰电极（pABSA/GCE）,并采用循环伏安法和线性扫描方法分别对多巴胺（DA）,抗坏血酸（AA）,尿酸（UA）以及三者的混合液进行了测定,研究了该修饰电极的电化学行为。结果表明,pABSA/GCE对AA,DA,UA有良好的电催化作用。在混合液的测定中,三者可以很好的分离,AA-DA、DA-UA、AA-UA的峰电位差分别为265 mV,146 mV和411 mV。该pABSA/GCE修饰电极既用于混合液中AA、DA和UA的分别测定也可以用于三者的同时测定,电极重现性和稳定性良好。
Based on the homogeneous coprecipitation synthesis of BaTiO3/BaFe12O19 core/shell particles by using urea as precipitator,transmission electron microscope(TEM),X-ray diffraction(XRD) and Fourier transform infrared(FT-IR) were used to characterize the morphology,structure and composition of BaTiO3/BaFe12O19 core/shell…
The article describes basic needs of users of a database for management of revision and compilation of nuclear radiation safety regulations and standards,the data structure of the Prototype Database, the function of the Client software of the Prototype Database and the application of the Prototype Database.
Based on structure analysis,the key points on casting technology were recognized.With the help of numerical simulation on solidification process of casting and combining with the production practice and properly using inner chills,a reasonable foundry process design for connecting rod casting was finished which insure…
To biomimic the composition and core-shell structure of natural Bombyx mori silk,regenerated ultra-fine fibers with a core(silk fibroin,SF)-shell(silk sericin,SS) structure were prepared by coaxial electrospinning.The influences of core flow rate(Qc),applied voltage(U),distance from capillary to collector(D) and the s…
Mogucnost upotrebe tlaka pri istraživanju razlicitih elektronskih faza u materijalima je dobro poznata. Cesto je tu metodu mnogo jednostavnije primijeniti nego proucavati seriju materijala s razlicitim kemijskim sastavom. Takodđer je interpretacija dobivenih rezultata jednostavnija jer su izbjegnuti problemi sa nehomo…
Novel red-emit phosphors,Na2Ca4(1-x-y)(PO4)2SiO4∶xEu3+,yBi3+ were synthesized for WLED by conventional solid-state reaction at 1 200 ℃.Effects of the H3BO3 flux,the re-calcination time and doping concentrations of Eu3+,Bi3+ on the luminescence properties were investigated.It was found that a higher Eu3+ emission inten…
At present,the early detection of high temperature hydrogen attack(HTHA) was one of problems needed be solved urgently for petrochemical enterprises who wanted to achieve the equipments running for longer circulating.Standard specimens comprising the HTHA were designed and produced.The dependency between the degree of…
AgLa(WO(4))(2) dendritic nanostructures with clean surfaces were synthesized through a low-cost hydrothermal method without introducing any template or surfactant. The formation mechanism was observed for the growth of dendritic nanostructures based on the experimental process. X-ray diffraction, scanning electron mic…
The research process of the non-thermal plasma technologies used in diesel engine exhausts purification without catalyst,such as the corona discharge and dielectric barrier discharge(DBD) technologies,was introduced.The recent developments and future trends of these non-thermal plasma technologies used in diesel engin…
A novel compound,(C5H7N2)3(AsMo12O40)·3C5H6N2·2H2O,has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction,IR,UV/Vis and TG-DTA.Using catalytic elimination reaction of acetone as a model reaction,the catalytic performance of the title compound has been tested.The result…
OBJECTIVE To investigate the pharmacokinetic parameters and main organ distribution of c-erbB2 antisense probe labeled with superparamagnetic iron oxide nanoparticles in new Zealand white rabbits and BALB/c mice.METHODS Eighteen new Zealand white rabbits randomly divided into high,middle and small dose groups.Blood wa…
The T-shaped complexes OCS…hydrocarbon were investigated at the B3LYP/6-311++G(d,p),B3LYP/aug-cc-pVDZ,MP2/6-311++ G(d,p),MP2/aug-cc-pVDZ,and MP2/aug-cc-pVTZ levels of theory.The S…π bonding interaction was studied by topological analysis of electron density.We separated the σ and π electron densities and obtained the…
Polyamide 6(PA6) was electrospun into functional nanofiber mats with the addition of Ag and TiO2 nanoparticles.Under the condition of same mass fraction of nano-powder,the relationships between the ratio of two kinds of nano-powder and the fiber morphology,crystal structure and mechanical property were studied.The fib…
Lauric acid random copolyether(LPE) aqueou solutions with different mass fraction are prepared.Friction-reducing and anti-wear performances of LPE aqueous solutions are tested on the friction and wear tester.Tribo pairs of steel/aluminum and steel/steel are selected and the influences of mass fraction,load,and specime…
Carbon nanospheres containing iron nanoparticles(CNSs) have been prepared by a spray pyrolysis method.The effect of varying the H2 flow rate during their preparation on their microstructure,crystal structure and magnetic properties was investigated.The CNSs prepared with an H2 flow rate of 3.0L/min had an onion-like s…
(Na0.66K0.34)NbO3 ceramics were prepared by conventional oxide solid-solution technique and the effect of CuO on the piezoelectric,dielectric and ferroelectric properties were investigated.The experimental results showed that the doping of CuO facilitated the grain growth and lowered the sintering temperature.By prope…