Materials Literature
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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…
Volatile Organic Compounds(VOCs) were harmful to human's health and could pollute environment,so they must be controlled and be dealt with properly.In this work,many monolithic catalysts were therefore prepared and examined,which used cordierite monoliths as carrier,γ-alumina as washcoat material and Cu-Mn-Ag metal ox…
The interaction of adriamycin rare earth complexes(ADM-M) with human serum albumin(HSA) have been studied by fluorescence spectrum.The results showed that ADM-M strongly quenched the fluorescence produced by HSA and this quenching could be interpreted in terms of mixture quenching.The binding constants and the number…
The experimental study of combined removal of SO2 and NO by activated char that prepared based on anthracite coal was carried out.At two different regeneration temperatures,five times of regeneration experiments of used samples were done.The results show that desulfurization and denitrogenation properties of the sampl…
Research progresses in butadiene-isoprene rubbers prepared with different catalytic systems were reviewed,mainly including transition metal,alkyl lithium and rare earth.Structures and properties of these rubbers were also introduced,especially low temperature and mechanical properties of rare earth butadiene-isoprene…
Using 107# rubber with viscosity in the range of 28～32 Pa·s as the base rubber,and the preparation and properties of silicone sealant containing filler,coupling agent and the curling promoter etc.were studied.Based on discussing the effect of the composition of silicone sealant on its properties and meeting the techno…
Objective To analyze the effects of amlodipine combined telmisartan on plasma collagen types Ⅰ and Ⅲ metabolism products carboxy-terminal propeptide of type Ⅰ procollagen(PⅠCP)and amino-terminal propeptide of type Ⅲ procollagen(PⅢNP)in essential hypertensive patients with left ventricular hypertrophy(LVH).Methods Seve…
The feasibility of substituting Molybdenum with Manganese in the casting work piece was studied by adding various levels of Manganese.The wear characteristics and the application under various working conditions were compared and discussed by mechanical property test and wear test.In addition,the comparison of wear ch…