Materials Literature
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All the possible geometrical structures of PtnNim(n+m=6,n、m≠0)clusters are optimized with a hybrid Density functional theory(B3LYP)at Lanl2dz level.For the ground state structures,the energy,thermodynamic properties,Nucleus Independent Chemical Shifts(NICS),spectrum and polarizability are studied.The calculated result…
Chitosan-Cu(Ⅱ) was synthesized by the reaction between water-soluble chitosan and cupric chloride in acidic medium.The structure of chitosan-Cu(Ⅱ) complex was characterized by IR,UV and TG-DTA.Moreover,the antibacterial activity of Chitosan-Cu(Ⅱ) toward E.coli and St.aureus were tested in vitro.The results showed that…
A research on β-cyclodextrin inclusion technology for 2-noctyl-4-isotHiazoline-3-one is designed in this paper.By changing the proportion of β-cyclodextrin and OIT,inclusion time,inclusion temperature and mixed solvent ratio,the optimal conditions about the slow release antifungal agent for leather were obtained as fo…
Objective:To study the solubilization effect of 2-hydroxypropyl-β-cyclodextrin(2-HP-β-CD) on anethol trithione and the complexation of anethol trithione with 2-HP-β-CD.Methods:On the basis of single factor experiment,the drug complexed rate was adopted as the index,to study the effects of factors like host-guest molar…
1 at% Ce∶YAG nanopowders were synthesized at 1100 ℃ for 2 h in weakly reducing atmosphere by alcohol-water solvent co-precipitation method using Ce(NO3)3·5H2O,Y(NO3)3·5H2O and Al(NO3)3·12H2O as starting materials and NH4HCO3 as precipitant.Ce∶YAG transparent ceramics were fabricated after being sintered at 1800 ℃ in v…
Objective To discover the effect of fluid shear stress on the proliferation of human mesenchymal stem cells (HMSCs). Methods HMSCs were cultured on the bottom of the flow chamber for 1 day before exposure to fluid shear stress,and then exposed to 1 dyne/ cm2 shear stress for 6 h. We can acquire the proliferation curve…
A hindered amine polyurethane(PU)/VER materials PU/VER/DZ composite is successfully prepared by mixing N,N-Dicyclohexyl-2-benzothiazole-sulphenamide(DZ)into PU/VER IPNs.The microstructure and damping properties of the composite are characterized by DSC,XRD,SEM and DMA.The results show that the pure DZ is a crystalline…
This paper has obtained the interaction force between an line charge and an cylindrical conductor with constant electric potential by electric image method.With the change curves under specific circumstances,some discussions on the curves are made.
The performance of solid-electrolyte tantalum capacitor employing PEDT as cathode material is improved by studying the production process and adjusting the parameters of barrier material and doping agent.The effects of barrier material and doping agent are also studied,and the results shows that the desirable performa…
Spinel LiMn2O4 was synthesized by solid phase method.Li+ and La3+ were doped into main spinel phase LiMn2O4 and the influence of different Li-doping contents and La-doping contents on electrochemical performance of the material was studied.Physical performance of the material was tested by XRD and SEM and the results…
Aim To improve human-like collagen production by optimizing its culture medium.Methods The Plackett-Burman design(PBD) was used to evaluate the effects of eight composites on the production of collagen.The steepest ascent experiment was adopted to determine the optimal region of the medium composition.The optimum comp…
Spherical model catalyst with the diameter of 4 mm and 10-20 mesh(particle diameter of 0.85-1.68 mm)granular model catalyst were prepared by ordered packing of 23-293 nm monodisperse silica particles,which were prepared through hydrolysis and condensation of alkoxysilanes,and then calcining at 800℃.Based on the charac…
Acrylic-styrene nanometer core-shell emulsion was prepared by pre-emulsified-half continual feeding technics with butyl acrylate and styrene as soft and hard monomer respectively,the shell was shaped by copolymerization of styrene and methyl methacrylate.The mechanism was analyzed about preparing nanometer emulsion by…
A new type of scale inhibitor was synthesized by maleic anhydride and itaconic acid.A series of scale inhibitor were synthesized by radical polymerization.Factors such as the proportion of maleic anhydride/itaconic acid,reaction temperature and reaction time,which affect the efficiency of scale inhibitor,were discusse…
To get full understanding on the fiber structure of yak tail hair,the basic morphological structure and cortical cell structure of yak tail hair fiber have been characterized using optical microscope and scanning electron microscope.The results showed that the diameter of yak tail hair gradually decreased from root to…
The microstructure, mechanical properties and tribo-wearability of the wear-resistant cast steel are investigated by designing the chemical composition and optimizing the heat treatment process. The results show that lath martensite is obtained through alloying and optimizing heat treatment process. The mechanical pro…
Objective To evaluate antibacterial activity of the titanium samples after the surface structure had been altered by electric discharging using laboratory electrolytic method.Methods Titanium samples with identical specifications were placed in different electrolyte solutions and connected to the DC anode.The composit…
Nontoxic plasticizer trioctyl citrate(TOC) was synthesized from citric acid and n-octanol using SO2-4/TiO2-Fe3O4 magnetic solid superacid as the catalyst.The influence of various factors on esterification percentage was inveatigated.The results showed that esterification percentage of over 97.3% was obtained under the…
The development process of NdFeB magnetic material in China was introduced.The production and development of NdFeB magnetic industry in Ganzhou City,an ionic rare earth mine supply base instead of a NdFeB production base in south China,was summarized However,an integrated industry chain combined with rare earth exploi…
A control system of fancy spinning frame based on CAN bus is studied.It is composed of controller for fancy spinning frame,CAN bus,epistatic computer and the monitoring software.The processing parameters can be input the epistatic computer by operator or be loaded from the database,then the data is send to the control…