Materials Literature
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The preparation and characteration of type Ⅱ collagen-chondroitin sulfate(CS) scaffolds and the application in tissue engineering cartilage were studied.Porous type Ⅱcollagen-CS scaffolds were prepared using variable concentration of 1-ethyl-3(3-dimethyl aminopropyl) carbodiimide(EDC).The physico-chemical properties o…
The 2,2'-dibenzothiazyl disulfide(accelerator DM) was synthesized with 2-mercapto benzothiazole(accelerator M) and ammonia water as materials,hydrogen peroxide as oxidant,and catalyzed with catalyzer A.The effect of the kinds of catalyst,the quantity of the catalyst,the ammonia water,the mass ratio,reaction time and r…
The complex of chitosan with Sm(Ⅲ) was synthesized,and its antibacterial activities against E.coli,St.aureus and A.niger were investigated in vitro.Moreover,the interaction of chitosan-Sm complex with calf thymus DNA was studied via UV spectroscopy.The results showed that the antibacterial activity of chitosan-Sm comp…
Changes in the microbial community and quality of black-gill bighead croaker meatballs with added chitosan at levels of 0,0.05%,0.15%,0.25%,0.35% and 0.5% as an excellent biological food preservative were investigated during storage at 0 ℃ in a vacuum packaging environment.It wad found that adding chitosan at 0.5% cou…
Anodizing is an effective method to improve the corrosion resistance of magnesium alloys.In this paper,a novel anodizing process based on an environmental friendly electrolytic bath which is free of chromate,fluoride or any other poisonous ingredient was developed for the anodizing of AZ91D magnesium alloy.The results…
In this paper,cutting force,chip shape and metallographic structure were measured and analyzed through the observation of cutting experiment process for SiCp particle reinforced aluminum(SiCp/Al) composites.The relations between variation of chip shape and the cutting data and cutting force were observed respectively…
The effect of calcium on the strength of alkali-activated cementitious materials,which synthesized from water glass and calcined of bauxite ore-dressing tailings,was investigated.The results showed that the presence of CaO did not alter the composition of tailings during calcining.The strength of mortars would be enha…
Layered perovskite cobalt oxide Y1-xCaxBaCo2O5+δ(x=0,0.1,0.15,0.2) materials were synthesized by solid state reaction.Oxygen absorption and electrical transport properties of all the samples have been investigated.XRD results indicate that the structure of Ca2+ doped samples has the same Layered perovskite structure o…
As the traditional raw materials formaldehyde and furfural have the characteristics of high toxicity,high volatility and penetrating odor,they were replaced by α,β-furyl-acrolein of high boiling point,low volatility and low toxicity in the preparation of modified phenolic resin with the reaction with phenol.Furan ring…
This paper briefly introduces the structure of stirring vehicle and its main roles during the treatment of molten aluminium in holding furnace and melting furnace,analyzes the problem during the operation of slag scrapping plate of stirring vehicle,presents the improvement measure and puts it into practice,achieves fa…
Recent advances in study on the preparation of ultra-fine barium carbonate particles were summarized.Different preparation methods,including high gravity technology,liquid precipitation,micro-emulsion,homogeneous precipitation,template,low temperature solid-state reaction,microwave-assisted synthesis etc,were describe…
Two Pd catalysts with different molar ratios of Pd and Si(n(Pd)/n(Si)) supported on mesoporous molecular sieve MCM-41 were synthesized in one step method assisted by microwave,and characterized by means of XRD,FT-IR and N2 adsorption-desorption.The two Pd-MCM-41 were applied to decomposition reaction of formic acid at…
Cellulose sulfate was synthesized by using Microcrystalline Cellulose as raw material,utilizing mixture of H2SO4 and C3H7OH as esterifying agent.Influence factors including molar ratio of H2SO4 :C3H7OH,ratio of liquid to solid and reaction time were researched.The best process was ascertained by orthogonal experiment:…
To improve the refined process of cefuroxime sodium.The results showed that the improved process is applicable in industry production and one mole yield could be higher than 95%,color grade ≤2#.
Based upon the variation of the energy functional with moving boundary condition,a new analysis method to investigate the morphology of an arbitrary droplet is presented,and the governing equation,i.e.the Laplace equation,and the transversality conditiion,i.e.the Young's equation are derived.When the size of the dropl…
Objective:To investigate the effect of the RGD peptide-mediated MR molecular probes on the MRI application of LOVO cells in vitro and the biological behavior.Methods:The nano-technology constructed RGD peptide-mediated MR molecular probes were used.The binging situation was detected by the fluorescence phase contrast…
The 134 dtex/144 f PET POY semi-dull product can be successfully developed by using the process route of the melt direct spinning one hed two tails unit yield large capacity flexible polymerization equipments,using the Barmag DIO spinning pack,using the advanced EVO circular quench air unit and WINGS40T-1500/10 windin…
The effect of solution treatment on the austenitic grain growth behavior of Haynes 230 alloy was investigated.With increasing the solution treatment temperature from 1 200 ℃ to 1 250 ℃,the grain size grew significantly and the growth exponents η which were calculated within the range from 0.112 to 0.361.The grain grew…
The domestic and foreign thermal stabilizer industry and market were introduced.The problems in the production and application of lead-free thermal stabilizer for poly(vinyl chloride)(PVC) were analyzed and discussed.The calcium,zinc,and organic tin based thermal stabilizers were considered as non or low toxic ones,wh…
The rheological behavior of plasticized poly(vinyl alcohol)(PVA) was investigated with capillary rheometer.The effect of cooling rate on crystallization properties of PVA was studied with differential scanning calorimetry analyzer(DSC).The PVA foams were fabricated by filling chemical foaming agent through melt extrus…