Materials Literature
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Polyester is an important material in chemical fiber industry. Treatment technology of wastewater from polyester industry production at home and abroad is summarized and appreciated. Suggestions for treating this kind of wasterwater are put forward.
Objective To introduce the current application of poly(lactide-co-glycolide)(PLGA) nanoparticles or microparticles as the carriers of macromolecules.Method To review the related literatures comprehensively.Result PLGA and PLGA-based polymers are biocompatibile and biodegradable, and have been widely explored as carrie…
C/C-SiC brake composites show low density,wear-resistant,high coefficients of friction,effective braking,strong environmental adaptability and greatly extended lifetime.it is concluded that C/C-SiC composites is a high property friction composites which can meet the requirement of advanced friction systems.Now,C/C-SiC…
Objective To study the release mechanism of doxycycline hydrochloride (Doxy·HCl) from hydroxyapatite (HAP) microspheres. Method Doxy·HCl was adsorbed onto HAP microspheres from solution and then the drug loaded microspheres were lyophilized for futher investigation. The effect of initial Doxy·HCl concentration on the…
Take the edible lotus leaf and stalk as raw material,lotus fiber was produced by degumming methods such as river retting and sodium hydroxide boiling.The components and properties of the fiber,such as moisture regain,density,linear density,strength and break elongation,were tested.Infrared spectroscopy(IR),X-ray diffr…
Perovskite-type manganites La_(0.9)Mg_(0.1)MnO_3 were prepared by sol-gel method.The structure,the curie temperature,and the magnetocaloric effect were investigated by XRD and VSM.The results showed that this material was hexagonal pervoskite,the curie temperture was 160 k,and the maximum magnetic entropy changes(ΔSM)…
Based on the brief history of Mg-Li alloys, the research development of Mg-Li-RE(rare earth) alloy systems has been reviewed, with particular emphasis on the Mg-Li-RE ternary alloys and other Mg-Li alloys containing RE.The influences of RE on microstructures and properties of Mg-Li alloys are introduced, and the probl…
Carbon nanotubes are a completely new type of carbon material family with unique tubular structures of nanometer scale which can be described as a seamless cylinder of rolled up hexagonal networks and helical fashion of graphite sheets. In recent years, carbon nanotubes have become the focus of considerable study beca…
The physical properties of graphene and its related carbon nanotube(8,0) has been studied by using Density Functional Theory based on Generalized Gradient Approximation. The results indicate that the inclined bond length of each line in graphene changes in the periodic law of AAB,while its related carbon nanotube chan…
Melted AZ31 magnesium alloy ingot and commercial magnesium alloy AZ31 material were deformed different procedures and cycles by continuous variable section extrusion cycle.The results showed that CVCE technology can make the material structure refine,and the refining effect was very notable.As the deformation amount i…
The effects of the amount of transglutaminase,protein concentration and the reaction pH on the hardness and elasticity of peanut protein gel were studied,and the optimal conditions for gel hardness and elasticity were determined by response surface methodology.The results showed that the gel hardness and elasticity we…
The fragment impact initiation of the charge covered with a thin plate was researched.Fragment impact initiation experiments in which impact speed were between 1200m/s and 1300m/s for JH-2 charge by compression method and five kinds of fragment mass.Based on Held's critical initiation criterion of high speed fragment…
Al2O3-SiO2/AZ91D composites were fabricated by squeeze infiltration process. Taking low price and extensive source silicate aluminum short fiber as reinforcement,and phosphate aluminum as binder,the fabricating process was improved. Al2O3-SiO2/AZ91D composites was prepared by the optimum technique of squeeze casting,t…
In order to improve the hydrogen-release dynamic performance of metal magnesium,the microlitic carbon prepared from anthracite by demineralization and carbonization was used to add into the magnesium powders to produce the magnesium-carbon composed hydrogen-stored materials with high performance by reactive ball milli…
Rare-earth elements are characterized with their biological effects on some organisms. Besides the increase production effect in agriculture, rare-earth elements also have antimicrobial effect in clinic. Re-cently, the antimicrobial effect and mechanism of rare-earth elements are under investigation by some schol-ars.…
Generally transformers noise exerts impacts on indoor residential environment through acoustical conductivity of building solids and structural radiation.By installing vibration insulation based noise barriers significant noise mitigation can be achieved.
Fresh culture of Pediococcus acidilactici strain was inoculated in MRS broth and cultivated at 37℃ for 16h.Standard curve of antimicrobial activity was established,so that antimicrobial activity of pediocin could be determined.To determine the pH-adsorption character of pediocin onto producing bacteria,the adsorption…
A new type of functional polymer adsorption material of PEI/MCC was synthesized with polyethyleneimine(PEI) as functional group and modified cellulose as carrier,PEI was grafted on cellulose by using epoxy chloropropane(EC).PEI/MCC was characterized by XRD,FT-IR,element analyzer and its adsorption capacity of uric aci…
ITQ-13 zeolite was successfully synthesized using three silica sources,i.e.,tetraethylorthosilicate(TEOS),colloidal silica,and fumed silica,and was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),BET surface area,and acidity by the adsorption of d3-acetonitrile.Characterization results showed…
The penetration performance of the two kinds of non-circular cross-sectional projectiles with the same mass,length and density was tested.The 3D finite element models were established by ANSYS/LS-DYNA analysis technology based on the tests of penetrating target plates with the projectiles.For analyzing the variation o…