Materials Literature
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Objective To investigate the property of genipin-crosslinked silk fibroin(SF)/chitosan(CS) microspheres for slow releasing of bovine serum albumin(BSA).Methods BSA-loaded genipin-crosslinked SF/CS microspheres were prepared by emulsion cross-linking technique.The micropheres were observed for surface morphology and si…
In terms of tandem cold mill productivity and product quality,a multi-objective optimization model of rolling schedule based on cost function was proposed to determine the stand reductions,inter-stand tensions and rolling speeds for a specified product.The proposed schedule optimization model consists of several singl…
The graded-index optical films prepared by PECVD have some distinctive advantages when compared with others.By controlling reaction gases ratios,the relationship between different reaction gases ratios and refractive index、extinction coefficient、deposition rate of thin film is analyzed,the reasons for variation of ref…
Plasmon characteristics in nitrogen-doped graphene nanostructures are studied by time-dependent density functional theory. The pyridinic-nitrogen doping does not affect plasmon characteristics of graphene nanostructures,while the substitutional-nitrogen doping affects plasmon resonances of graphene nanostructures due…
The work also contains information on the mathematical modeling of non-stationary elastic stress waves in deformable objects with complex shapes. For the solution of two-dimensional non-stationary dynamical problems of the mathematical theory of elasticity with initial and boundary conditions using the finite element…
For studying the effect of 2 approaches of hot-air rrying on Mao-bamboo curtains,based on the traditional approach of hot-air drying Mao bamboo curtain,plastic porous zones with 3 ~ 5 mm was used as the curtain's compartment,and Micro vacuum dehumidification system was added as well. The results showed that the convec…
一系列新 polycalixesters (PCES ) 被 calixarene 的 polyesterification 综合有第三级的丁基的二羟基的酸衍生物在用五不同 diols 的上面的边界的悬挂的组。所有聚酯在极的溶剂例如是容易地可溶的 NMP (N-methylpyrrolidone ) ， DMF (dimethylformamide ) ， DMSO (dimethylsulfoxide ) ， pyridine， THF (tetrahydrofurane ) ， HMPA (hexamethylenephosphoramide ) 和 DMAC (dimethylacetamide ) 。PCES 在 TCE…
Composite materials containing NaY molecular sieve and matrix in the form of microspheres were synthesized by hydrothermal crystallization method with Si-Al gel as a template, which was added to the Kaolin slurry then spray-dried and calcined.The samples were characterized by X-ray diffraction,N2adsorption-desorption.…
采用化学-物理交联法制备了聚乙烯醇／壳聚糖／纳米羟基磷灰石（PVA／CS／n—HA）复合水凝胶材料。通过对比其含水率、拉伸强度、红外光谱和TG谱图，探讨了PVA含量及戊二醛加入量对材料性能的影响。结果表明，m（PVA）：m（CS＋黔HA）=5：1，戊二醛质量分数为2％时，复合水凝胶材料具有较好的综合性能：含水率为82．O％、拉伸强度为2．14MPa、断裂伸长率为343．26％；同步热分析表明，25～140℃，仅存在水分的蒸发，直至360℃材料才发生分解，说明材料的热稳定性良好；红外分析表明，CS与戊二醛发生了交联反应。
Al based metal matrix nanocomposite (MMNC) is synthesized by dispersing nanocrystalline aluminium nitride (AlN) particles in Aluminum matrix using ex-situ melt metallurgy method. The entrapment of atmospheric oxygen along with ex-situ particulate has been a long standing issue during fabrication of metal matrix compos…
Density functional theory (DFT) was utilized to simulate the reactions occurred in the mixture solution of cysteine and Hg(II) ions with the ratio 2. Simulation result shows that Hg ions will coordinate to cysteine by the thiol groups with the form of S-Hg2 and S-Hg3, and moreover, the content of free Hg ions can only…
The nanocomposites of SnO2-CuO/graphene are synthesized via a two-step method. CuO nanorods are firstly uniformly loaded on the graphene nanosheets,and then SnO2 nanoparticles are coated on CuO nanorods. SnO2-CuO/graphene nanocomposites exhibit high cyclability and capacity as anode of Li-ion battery. After 30 cycles,…
A novel neodymium pentafluoropropionate complex,Nd(C2F5COO)3·Dmbp(Dmbp:4,4′-dimethyl-2,2′-bipyridine),was synthesized and characterized by elemental analysis,Fourier transform infrared spectra.The optical porperties of the liquid medium which was abtained by dissolving Nd(C2F5COO)3 · Dmbp in N,N-dimethylformamide was…
Anatase TiO2 nanoplates, with average side length ranging from 90 to 200 nm and average thickness ranging from 20 to 60 nm, were successfully fabricated by annealing anodized TiO2 nanotubes with different heating rates. The as-synthesized TiO2 nanoplates and nanotubes were analyzed by field- emission scanning electron…
An inorganic/organic hybrid nanoscale molecular pocket ZNPs-TCPP was constructed through the assembly of 5,10,15,20-tetra(3-carboxyphenyl) porphyrin (TCPP) on the surface of ZnO nanoparticles (NPs), which highly selectively recognized 5,10,15,20-tetraphenylporphyrin (TPP) molecule. The resulting hybrid nanoscale molec…
Disc-electrospinning using a disc as spinneret and a rotary drum as collector is a novel technology to prepare nanofiber which has been applied in tissue engineering scaffolds. In this study, nanofibrous mats with mlcro-patterned structure were fabricated via disc-electrospinning. Poly （e-eaprolactone） （PCL） was disso…
10Cr12Ni3Mo2VN steel is mainly made by forging and usually used to make last stage blades of ultra-supercritical unit,demanding strict standards of microstructure property because of its hard service environment,so it is necessary to conduct deep research on its hot deformation behavior.The hot deformation behavior of…
Phytochemical investigation of the roots of Scrophularia buergeriana Miq.(Scrophulariaceae), resulted in the isolation of a new iridoid derivative named as buergerinin(1). Its structure was elucidated as rel-(1R, 5R, 6R)-(2-oxa-bicyclo[3.3.0]oct-7-en-6, 7-diyl)dimethoxypropane based mainly on MS and 1D and 2D NMR spec…
To explore the feasibility of mesenchymal stem cells(MSCs)acting as seed cells in tissue engineering,we isolated human bone marrow MSCs and differentiated them into vascular endothelial-like cells(ELCs)in vitro.Bone marrow mononuclear cells(BMSCs)were isolated by the method of percoll density centrifugation,and seeded…
Using 99.99% pure argon as sputtering gas,MgZnO films with wurtzite structure were prepared on quartz substrate by radio frequency magnetron sputtering technique with MgZnO targets of different Mg content and then annealed under 10-4 Pa in a tube furnace.Effects of Mg content on the optical properties of these films w…