Materials Literature
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A terminal-vinyl liquid crystal 4′-(ω-undecenyloxyl)-4-xenol was synthesized and used to modify terminal-vinyl organic-inorganic hybrid silica monolithic column by free radical polymerization procedure using 2,2′-azobis(2-methylpropionitrile)(AIBN) as an initiator.Naphthol,PAHs,phthalate ester and steroids were succes…
The effect of finishing rolling temperature on microstructure and mechanical properties of Si-Mn hot-rolled dual-phase steel had been studied when using large deformation in low temperature area and continuous cooling after rolling.The results reveal some facts as follows.Under the condition of the tested process,the…
A low-melting point copolyester was prepared by introducing the third(isophthalic acid) and the fourth(PEG) components into poly(trimethylene terephthalate) molecule during copolymerization.The molecular structure,crystallization behavior and thermal stability of the low-melting point copolyester were studied.The resu…
The electronic effect of catalysis and substrates plays an important role in the enantioselectivity of asymmetric catalytic reactions.The stilbenes,especially resveratrol which have a large conjugated system,have satisfactory bioactivities and can take place many reactions.Thus it is valuable to study the structure mo…
It is difficult to eliminate the crease in wet processing of nylon/cotton heavy knitted fabric,the measures are proposed. During presetting,temperature and running speed should be well controlled at 190℃and 16 m/min seperately.Scouring with enzymes can avoid the crease generated during alkali-oxygen pretreatment at hi…
The 3-hydroxy-N′-[(1Z)-(2-hydroxyphenyl)methylene]-2-naphthohydrazide(H2L) and its Cd2+,Co2+,Cu2+,Zn2+ complexes have been synthesized in this work.By means of elemental analyses,IR and UV,the H2L and its complexes were characterized.The components of complexes were confirmed and the structure was also studied.
Hydroxyapatite whiskers were synthesized by hydrothermal homogeneous precipitation method through using three different organic templates.The morphology,aspect ratio and phase composition of the as-prepared whiskers were characterized by SEM and XRD.The results show that hydroxyapatite whiskers can be synthesized thro…
On the basis of high speed milling tests of XW-42 Steel,an empirical formula of surface roughness of XW-42 steel in high speed milling was established.The effects of cutting speed,feed rate and depth of cut were analyzed.The best cutting parameters were achieved by using the genetic algorithm.This paper provided a fou…
The residual stress and the magnetic leakage were detected in 16MnR near the welding seam.It sets up the device according to the principle of residual stress in the magnetic memory.Then the set up device is used to scan the plank of welding and get the measuring result.The residual stress is measured with the eyelet m…
A novel three-nuclear phthalocyanine zine(PcZn) is synthesized and characterized by Mass spectrum(MS) and elemental analysis.The result indicates that the final products are in agreement with our proposed ones.After spining cost the mixture of PVK and the materials on quartz slice,we found there was a strong emitting…
Using the non-equilibrium Green's functions combined with first-principle density functional theory,the transport properties of the boron/nitrogen co-doped single-walled nanotube of(5,5) are studied in this paper.The results show that the co-doping converts the metallic nanotube into semiconducting one,and nonlinearly…
Microcapsules containing carbosulfan with urea-formaldehyde(UF) were prepared by the in situ polymerization method in aqueous medium.The properties of carbosulfan microcapsules were analyzed with emulsifier,rate of pesticide and wall,temperature,acidifying agent,adsorbent agent of formaldehyde,modifier.According to th…
Ta2O5 powder was prepared by neutralization crystallization and calcination.The influences of the six factors in the process of neutralization crystallization on the Ta2O5 particle size were studied including the concentration of tantalum solution,the initial pH of tantalum solution,crystallization temperature,ammonia…
Vanadium oxides were fabricated by a surfactant-assisted hydrothermal route at 180 ℃.Vanadium pentoxides were pre-pared by calcining the precursor VO2.The samples were characterized by X-ray diffraction,scanning electron microscope and infra-red spectroscope.The V2O5 with rectangle nanorods as the cathode material,was…
PEGylated cationic liposomes containing 0%-5%(mole fraction) 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000](PEG) were studied as siRNA delivery system.Two groups of cationic liposomes containing 1,2-dioleoyl-3-trimethylammoniumpropane(DOTAP) with mole fraction of 20% and 40% resp…
Objective To assess the value of plain X-ray radiography,CT and MRI in the diagnosis of synovial osteochondromatosis.Methods Twenty patients with synovial osteochondromatosis confirmed with surgery and pathology were enrolled.The images of X-rays(n=18),CT(n=20) and MRI(n=10) were analyzed retrospectively.Results Defin…
As one kind of physical dilatable flame retardant,expandable graphite(EG) have the advantages of expanding in a short time,no dripping when burned and extinguishing the fire instantly at the beginning.To prepare EG with high dilatability and high initial temperature,the influence of various factors on dilatability of…
Phenyl carbamates were synthezed by carbonylation of nitrobenzene with alcohols or phenols and carbon monoxide in the presence of Pd-Fe/TiO2 catalyst.The effects of reaction conditions and various substrates on the yield of phenyl carbamates were investigated.It was found that Pd-Fe/TiO2 catalyst showed high activity…
The microstructure and property of four kinds of high-chromium surfacing layer alloy were investigated by hardness testing,metallographic analysis,abrasive jet wear testing.The results show that the hardness from high to low is S1T1S2T2.The amount,morphology and distribution of hard wearable phase are the key factors…
Oceans or inland fresh water disasters resulting from oil spills have created a great need to find more efficient materials for oil spill cleanup. Mechanical recovery by the help of oil adsorbents is one of the most important methods in oil spill cleanup. Most biomass adsorbents, however, end up in landfills or in inc…