Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Objective To ensure the clinical safety,characterizations of succinylated gelatin injection(Gelofusine),and study its raw material gelatin.Methods Spectrophotometry,thermal gravimetric analysis(TGA),differential scanning calorimetry(DSC)were applied forn the determination of water content and glass transition temperat…
This paper investigated the influence of supercritical CO2 fluid treatment on the structure and properties of ramie fabrics by extraction method.Composition and content of the gum,dyeing property,whiteness,strength,capillary effect and permeability of the ramie fabric treated by supercritical CO2 fluid were measured,a…
Based on the analysis of the attenuation and dispersion properties of HVDC plastic cables,coupling mode of pulsed electric field,as well as the electrode system,this paper describes the space charge measurement system for HVDC plastic cables.Then the system is experimented to measure the space charge distribution of H…
Fast-activated Zn electrode and AgO electrode were prepared by paste-compressing method.The effects of binders to the electrochemical performance of electrodes were studied.Hummer test,SEM,activation time and discharge performance analyses showed that the electrodes could resist high acceleration impact of 5.98×104 g…
Based on the military engineering applications of magnesium alloys and structure features of light-weight pressure-resistant cabin,this paper puts forward that foundry magnesium alloy may be the suitable material applied to pressure-resistant cabin structure of the unmanned underwater vehicles.ZM5 magnesium alloy was…
NIT-oNO2=2-(2′-nitrophenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide(1) and its Cu(Ⅱ) complex [Cu(NIT-oNO2)(hfac)2]](2) have been synthesized using o-nitrobenzaldehyde,2,3dimethyl-2,3-dinitrobutane and Cu(hfac)2.The ligand and its Cu(Ⅱ) complex were characterized by elemental analysis,IR spectra,and single crysta…
The Mo-La2O3 slab was prepared by liquid-liquid doping and powder metallurgy,and then rolled into plate.After annealing at different temperature,the tensile strength of the Mo-La2O3 plate was tested at room temperature.The fracture surface of the Mo-La2O3 plate and its La2O3 content and distribution were analyzed by S…
Using thiourea and tert-butyl bromide as raw materials,water as solvent and several different PS grafted quaternary ammoniums as catalyst respectively;the tert-butyl mercaptan(t-BM) was prepared via salification and hydrolyzation reactions.The structure of the prepared t-BM was identified by FT-IR and 1H-NMR.It was fo…
When rigid polyurethane foam was cut and shredded in the closed room,release mass of CFC-11 was determined by using GC/MS.After putting shredded particles into the closed bottles,change of release mass of CFC-11 at room temperature was monitored during long-term placement.Results showed that CFC-11 release process fro…
The film forming technology of methyl-etherified hexamethylolmelamine(HMMM),binding agent of polyacrylate and glycol multicomponent system used on non-woven fabrics at high temperatures.The effects of usage amount of HMMM,glycol and heating-time on tensile strength,elongation at break,water absorption and contractibil…
One actinomyces strain WS-23883 was isolated from soil sample collected in Wuzhishan Mountain area,Hainan province.The extraction of the fermentation broth was bioassayed with some plant disease pathogens;and it exhibited high antifungal activity.The compound with purity above 90% was obtained through macroporus resin…
Five kinds of composite reagents were used to modify the bronze powder by physiochemical method at different proportions and quantities.By testing the print gloss,wetting property and morphology of the bronze powder,the influence mechanism of the different proportions and quantities of the composite reagents on print…
In order to explore the methods of improving the toughness of high silicon cast steel,with the help of corresponding equipment,the microstructure and mechanical properties of high silicon cast steel under different austempering temperatures and times were studied.The result shows that high silicon cast steel,isotherma…
Strip shape is a vital indicator of the geometric dimensions in the rolling process of strip.Two-dimensional rolling theory used previously can not meet the present rolling requirement because it has no considerations on transverse deformation.To master the three-dimensional deformation regular and establish the relat…
The thermal simulation experiments were performed by using a pipeline steel plate with yield strength 850 MPa.Effects of the various peak temperatures and cooling time on microstructure and properties of the heat affected zone(HAZ) were studied.The results show that the microstructure of base material is lower bainite…
The effect of modifier amount,modification temperature,time and slurry concentration on modification were studied.The results showed sodium citrate can be used to modify calcium carbonate powder,the best conditions were as follows:sodium citrate amount 6%,modification temperature 65 ℃,modification time 45 min,slurry c…
The classification and principle of the semi-solid forming technique of magnesium alloy is introduced,its research achievements and progresses in the recent years are reviewed,and its future research trend is proposed.
In this paper,the production process,product quality requirements,production quality control of laminate flooring were analyzed and discussed.Moreover,some suggests on floor selecting were given to consumers.
利用L-谷氨酸苄酯与三光气反应制备了N-羧基-L-谷氨酸γ-苄酯-环内酸酐（NCA）,以正己胺为引发剂,引发NCA开环聚合,合成了分子量为6700的聚L-谷氨酸γ-苄酯（PBLG）。利用核磁共振仪（1H-NMR）、凝胶渗透色谱（GPC）、傅里叶变换红外光谱（FTIR）以及一维大角X射线衍射仪（1D-WAXD）等表征手段对单体、聚合物结构进行了表征。结果表明,正己胺能够引发NCA开环聚合得到聚L-谷氨酸γ-苄酯,通过1H-NMR谱、GPC曲线测得聚合物的数均分子量;FTIR结果表明均聚物以分子内氢键作用形成α-螺旋结构;1D-WAXD衍射图表明,在该分子量下聚合物退火后结晶形成高度有序的六方晶系结构。
Cerium-incorporated SBA-15 molecular sieves(Ce-SBA-15) were successfully synthesized by a one-step direct synthesis method.Ce-SBA-15 molecular sieves have been modified subsequently by an incipient wetness impregnation technique in dilute sulphuric acid,which increases the acid strength of the surface.Their catalytic…