Materials Literature
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Changes of reactive oxygen and protective enzyme system in different cotton varieties,Zhongmian 41(tolerant variety) and Jimian 11(susceptible variety),induced by V.dahliae were studied.It was shown that malondialdehyde(MDA) content of cotton leaves reached a peak after 36 h induced by V.dahliae,which in Zhongmian 41…
Aiming at the problems of pulverizing wheel in use of S36.5 type fan mill,this paper expounds its abrasion mechanism and process,formulates the standards for surfacing welding evaluation for pulverizing wheel of fan mill,and adopts repairing welding to achieve the required surface performance(shock resistance,anti-abr…
We propose a new method to design a phase-shifted long period grating(PSLPG) by adding an embedded-modulation structure in a long period grating at some position.The spectral characteristics are obtained by the transfer matrix simulated approach.The studies show that when a uniform short grating embedded-modulation st…
A β-diketone ligand L(3-(4,4,4-trifluorobutane-1,3-diketone)-9-butylcarbazole) was synthesized according to literature method.The copper(Ⅰ) complex with fluorescent activity was prepared by the reaction of copper nitrate,copper,triphenylphosphine and L,which was characterized by elemental analysis and IR spectra.Its c…
A study was conducted about silicate interlamellar spacing,polymeric matrix chemical composition,montmorillonite structure unit dispersed state by X ray diffraction,infrared absorption spectra and transmission electron microscope.Intercalating polymer and Gaofen were evaluated and compared in variety ways like viscosi…
Three-dimensional(3D) carbon nanomaterials have different structures and morphologies,which have excellent electrical,optical and magnetic properties.They show good prospect of applications in the fields of electronic devices,sensors,photovoltaic materials,magnetic materials,other functional materials,and so on.The re…
Fe2O3 nanoparticles on reduced grapheme oxide(RGO) sheets were successfully synthesized via hydrothermal route for lithium ion battery applications.Selective growth of Fe2O3 nanoparticles on RGO sheets allowed for the electrically insulating Fe2O3 nanoparticles to be wired up to a current collector through the underly…
A novel halogen-free bis-phosphate flame retardant,namely neopentyl glycol bis-(diphenylphosphate)(NDP),was reported.NDP was synthesized by using chlorodiphenylphosphate(DPCP) and neopentyl glycol(NGP) as raw materials,and 4-diaminopyridine(DMAP) as catalyst.The factors that affect the yield were investigated,includin…
In order to improve the accuracy of finite element numerical simulation used in the study of the electric field distribution of external insulation equipment,the electric field of the grading ring and the insulator string was simulated and analyzed,and the optimized pipe diameter and install locations of the grading r…
Ferrite powders with a nominal composition Mg0.5Zn0.5Fe2O4 were prepared via the novel twice hydrothermal processes.An X-ray diffractometer,a scanning electronic microscope and an energy dispersive spectrometer were used to study their structural properties.It is found that the reaction time of the secondary hydrother…
In order to improve the integration wearing capability of fabric in winter coat filled with wool effectively,the main capability needs were studied,experimental and analytical induction method were used.The experiments of anti-penetration capability of wool,heat-preservation capability and breath-ability on different…
Soxhlet extraction method was used to determinate the content of pitch and stickies in the paper-making reconstituted tobacco slurry.The results showed that the appropriate extraction conditions were as follows: extraction solvent was methylene chloride,extraction temperature was 60℃,extraction time was 3 h.The conten…
Anodic oxidation technology was adopted to form ordered oxides film on the surface of stainless steel wire mesh.On the basis of the pretreatment for the catalyst support above,Cu/stainless steel wire mesh catalyst was prepared via electrochemical deposition method.Four kinds of VOCs were used to investigate the oxidat…
A new acidizing corrosion inhibitor ACR-1 of Schiff base was prepared from the materials of aniline and aromatic aldehydes by Schiff reaction.The effects of concentration of hydrochloric acid,corrosion temperature and concentration on the inhibitor to the inhibition efficiency of ACR-1 were studied by static weight lo…
The warm forging of spur gear was simulated by three modes of die which were upended forging in fixed cavity die,restrained divided flow in fixed cavity die and restrained divided flow in floating cavity die.Through the analysis of filling effect,the effective strain fields and the load,the optimized processes of impr…
Coalbed Methane,which is regarded as the coal killer and responsible for the green house effect,has become one of the most valuable gas resources since the oil crisis in the 1970s.In China,the exploration and exploitation of Coalbed Methane,like those of oil and gas,has always been registered since 1998,which does hel…
The microstructure of AZ61 magnesium alloy with the addition of Sm(0～2.0 wt%) was investigated by means of XRD,OM,SEM and TEM.The results show that with the addition of Sm,the spotted high-melting point Al2Sm particals are formed in the alloy.Al2Sm phase can cause the heterogeneous nucleation of α-Mg matrix and refine…
High-carbon cast steel shot with austenite matrix was prepared by adjusting alloying elements content such as C and Mn of shot and controlling smelting process,and then testing instruments such as OLYMPUS/GX-51 metallurgical microscope,AXIOS(PW4400) X-ray fluorescence instrument,D/max2200 XRD diffraction,carbon and su…
Shrimp head shell,the by-product of shrimp processing,was used to prepare chitin.The yield of chitin was 16.11±0.73% by acid pickling and alkali cooking method.The yield of chitosan(compared to chitin)was 68.07±1.60% by concentrated alkali treatment.Then,cellulase was used to degrade chitosan into oligochitosan.The ef…
The effect of Te(Ⅳ) stress on the growth of Spirulina maxima has been studied via spectrum analysis.The Te(IV) adding time ranged from the 5 th to 7 th day and the accumulating Te(IV) concentration was from 450 to 650 mg/L.The absorption spectra showed that the intensity of typical absorption peak of S.maxima aqueous…