Materials Literature
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There are various synthetic methods of polyepoxysuccinic acid sodium which all include two main steps of epoxidation and polymerization.To probe into the epoxy reaction mechanism and the polymerization reaction mechanism of the synthesis of polyepoxysuccinic acid sodium.
The air-stable HSe-ion was prepared by solid-state reducing element Se using KBH4 in triethanolamine(TEA) at ambient temperature.The orange precursor or intermediate was obtained by the reaction between HSe-ion and ZnSO4·7H2O in TEA.The results of organic elemental analysis,ICP analysis,IR and UV-Vis spectra indicate…
Five elements(i.e.,C,Ni,Cr,Cu and Mo) in stainless steel(CD4MCu) were determined by photoelectric direct-reading atomic emission spectrometry.Accuracy and precision of the method were improved by correction of interferences of co-existing elements,increasing number of standard samples used in preparation of standard w…
The workability and compressive strength of concrete mixed with limestone powder and slag were studied,and the pore structure and hydrates of concrete were researched.The results showed that the hydrates changed and the compactness increased with mixing the limestone powders.If the ratio of admixture was appropriate,t…
The comparison of 2010 ASME Boiler and Pressure Vessel Code,Section Ⅸ in 2007,studying some important changes and comparing with relevant provisions in Chinese Standard were introduced.
The sheet polyethersulfone(PES) hollow fiber membranes were prepared.The morphology and performance of the membranes can be controlled.By studying the influence of the compositions and conditions on the morphology and performance of PES hollow fiber membrane,the relationship of morphology and performance of the membra…
The sample fabrics were woven with colorless warp and two colored wefts,one with red,and the other with basic colors,i.e.,RG(red-green),RB(red-blue),or RY(red-yellow),and the spatial mixed color characteristics on the surface of the fabrics were investigated by varying color combinations and proportion of colored weft…
There are big differences in the morphology either from microcosmic or macrocosmic aspects between two batches of silk products,one unearthed from the tomb of Chu Dynasty in Jinzhou and the other from Ming Tomb of Ming Dynasty which is nearly two thousand years after Chu Dynasty.The status of ageing and degradation of…
The preparation process of spherical CaF2/BaF2 eutectic powders through plasma spray technology is investigated.The fluorides were first prepared by combining 68% BaF2 and 32% CaF2 to melt under vacuum at 1 100 ℃.The solidified fluorides were then crushed into powders for subsequent processing through plasma spheroidi…
The red phosphor BaMg2(PO4)2 :Sm3+ was synthesized by high temperature solid state reaction and its luminescent properties were also investigated.It show three major emission peeks locating at 564 nm,600 nm,648 nm,corresponding to the 4G5/2→6H5/2、4G5/2→6H7/2、4G5/2→6H9/2 typical transitions of Sm3+ respectively,and the…
Micron cell porous Al with high strength was fabricated by the vacuum-pressure sintering-dissolution processing.The preparation processing,strength and filtration property of the fabricated porous Al were studied.The results show that the sintering processing of Al powder under vacuum condition can be promoted evident…
3-(2-benzotriazolovinyl)thiophene (BVT) was synthesized by the connection of the thiophene with the electron-withdrawing group, benzotriazole, through the vinylene. Its structure was confirmed by FT-IR, -NMR, -NMR and 2D hetero-cosy spectroscopy. Both BVT and 3-octylthiophene (OT) were copolymerized and showed an aver…
Carbon nanotubes(CNTs) films were synthesized from methane and hydrogen gas mixture directly on stainless steel plates by microwave plasma chemical vapor deposition(MPCVD).The effect of arc discharge process on the field emission stability of carbon nanotubes films was studied.The ratio of the sp 2 over sp 3 carbon-ca…
(1-x)(Na0.5Bi0.5)TiO3-xBa0.5Sr0.5Nb2O6(0≤x≤1.0%)(abbreviated as(1-x)NBT-xBSN) lead-free piezoelectric ceramics were prepared by the solid state reaction.The phase composition,microstructure and electrical properties of(1-x)NBT-xBSN samples with different BSN content(x=0,0.1%,0.3%,0.5%,0.7%,1.0%,in mole) were investiga…
An interprocess antirust solution consisting of phytic acid with biological corrosion inhibitor and rare earth inhibitor was prepared and its performance for interprocess rust-proofing of steel parts was evaluated.Corrosion experiments of steel Q235 treated with the antirust solution were conducted in hygrothermal env…
This paper introduced the helium leak detection method for post-irradiation fuel rods and helium leakage device was designed,including the pressure helium device,suction gun leak detection device and vacuum-chamber leakage device,which was proved to be effective in hot cell.In the experiment,helium leak detection of p…
Blocked polyisocyanate were synthesized with diacetylmonoxime as blocking agent.The influence of the molar ratio,reaction temperature and time of blocking reaction were discussed by experiment.The deblocking temperatures of blocked isocyanate were researched by the infrared spectra.The results showed that the optimum…
Gal-1 plays an important role in defense system of chicken.To produce Gal-1 in eukaryotic cells,cDNA sequence of Gal-1 from the bursa tissue of Nantong Langshan chicken was cloned by RT-PCR.Then according to the requirement of yeast codon bias for protein expression,the new gene of Gal-1 mature fragment was synthesize…
Laser shock forming (LSF) is a sheet metal forming process which includes high-pressure, high strain rate and non-contact loading. A new forming process, Flexible Die Laser Shock Forming (FDLSF), without dies is developed. This new forming method uses laser-induced shock pressure to shape a sheet metal without complex…
Super homogenization(SPH) method maintains reaction rates conservation by adjusting the homogenized cross-section.In recent years,due to the rapid development of hardware condition and the requirements of more accurate analysis,nuclear industry has already paid more and more attention to whole core Pin-by-Pin calculat…