Materials Literature
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Te-promoted (1%) vanadium phosphate catalyst (VPDTe) was prepared via VOPO4·2H2O by calcining its precursor VOHPO4·0.5H2O in a flow of n-butane/air.VPDTe catalyst has resulted a higher existence of V5+ phase with V5+/V4+ ratio of 0.23.SEM micrographs show that Te addition altered the arrangement of the platelets from…
[Objective]To identify and understand radiation risk factors in an iron and steel corporation,to assess radiation risk level,and provide scientific evidence for better protection against radiation.[Methods]Through investigation on basic radiological protection in enterprises and historical data of radiation accidents,…
Solution polymerized styrene-butadiene rubber(SSBR),SSBR with end-capping modification(T-SSBR) by tert-butylchlorodiphenylsilane(large volume functional groups) and star-shaped SSBR were prepared by living/controlled anionic polymerization,and the structure and properties of those SSBRs were investigated.The results s…
Single phase Bi2ZnB2O7(BZB) powder was synthesized by solid-state reaction at 700 ℃.The sintering temperature of 16CaO-9Li2O-12Sm2O3-63TiO2(CLST) ceramics was efficiently decreased to 1 050 ℃ with as-synthesized BZB powder addition. The bulk density of the specimens increased and then reached saturation with increasin…
A novel FeQ3 complex[HQ=8-hydroxy-7-(4-tolyldiazenyl)quinoline-5-sulfonic acid] was designed and synthesized by displacement reaction.The structure was characterized by 1H NMR,13C NMR and elemental analysis.Selectivity visual acuity recognition of FeQ3 on cysteine and homocysteine were achieved by UV-Vis and change of…
Two superhydrophobic surface materials are synthesized by modifying multi-walled carbon nanotubes(MWCNT) with short fluorocarbon chain terminated hyperbranched polyester/poly(urea-urethane)(HPEF/HPUF).The characterization of pure nano composites(MWCNT-HPEF/HPUF) by FT-IR and SEM indicates that HPEF/HPUF are covalently…
The transient kinetics of the selective catalytic reduction(SCR)of NO with NH3 and the influence factors of V2O5-WO3/TiO2 catalyst activity at low temperature were studied in a fixed-bed reactor by temperature programmed technique and transient response technique.The experimental results showed that the promoting effe…
Monodispersed spherical Cu2O particles were prepared by reducing Cu(OH)2 with glucose.The products were characterized by XRD,SEM and Smileview software.It has been found when the reaction temperature and glucose concentration rose,the mean grain diameter of Cu2O was enlarged,and when NaOH concentration decreased,the m…
The research on thermal behavior decomposition of 1-methyl-4,5-dinitroimidazole(4,5-MDNI) was carried out by using DSC-TG combined technique.The non-isothermal thermal decomposition mechanism and reaction kinetics of 4,5-MDNI were investigated by using DSC-TG technique in the presence of nitrogen gas at linear heat ra…
The main electric circuit and the controlling electric circuit of cycle reverse rectification power for copper electrolysis are designed.It is proved by the scene operation practice that by the using of cycle reverse electrolysis power,the density of electrolysis current can be increased,but requirements for anode pur…
Previous studies have revealed that a point mutation of a target gene is related to insecticide resistance to pyrethroids.The para sodium channel in the insect central nervous system is the target of pyrethroid insecticides.We used the RT-PCR method to clone the para sodium ion channel in the silkworm,Bombyx mori L.(G…
The thermal behavior of poly-5-vinyltetrazole(PVT) was studied by DSC and TG-DTG raising temperature gradually.The compatibilities of PVT with propellant main components including RDX,HMX,CL-20,DNTF,AP,Al and Mg were investigated by DSC and vacuum stability test methods.The results show that thermal decomposition of P…
Perovskite-type composite oxide catalysts La_(0.75) K_(0.25) Mn_(0..95) Cu(0.05) O_3/CeO_2 with loading mass fraction of 10% ,20% ,30% ,50% and 100% were prepared by impregnation method,and characterized by using XRD,FT-IR and UV-Vis DRS techniques. The performance of the catalysts for FCC regenerated flue gas purific…
Precipitated phase in δ-Fe of P92 steel after aging at 600 ℃ was analyzed by transmission electron microscopy(TEM),scanning electron microscopy(SEM) and energy-dispersive spectrometer(EDS).Experimental results show that VN and Laves phases are precipitated in δ-Fe region.The size of rod-shaped VN keeps stable after ag…
BaMgAl10O17:Eu2+(BAM)blue phosphors were synthesized by high temperature solid state reaction.The influences of composite fluxes,such as H3BO3+BaF2,H3BO3+AlF3and BaF2+AlF3,on phase purity,particle morphology and luminescent properties of blue phosphors were investigated.The results indicated that samples fluxed by H3B…
This study evaluated the treatment efficiency of pulp and paper effluent by immobilization of four dominant bacterial strains,which were screened by the method of statistical analysis.Results showed that the average removal of CODCr was 50.34%(Agrobacterium sp.),34.57%(Bacillus sp.),57.58%(Gordonia sp.),43.09%(Pseudom…
OBJECTIVE To prepare silver nanoparticles with small particle diameter,good stability and high antimicrobial activity.METHODS The silver nanoparticles were prepared by chemical synthesis using silver nitrate,maltose and ammonia water as the reactants.The main physical properties of silver nanoparticles were characteri…
Study on carbon nanotubes(CNTs) as drug carriers and their safety were introduced in this review.Recent evidence suggests that with the cross development of biology and material science,researchers realized that applications of new drug carriers are crucial to the research of drugs.Due to their unique structure,CNTs c…
In weaving process,there is skewing with worsted cashmere 3-ply yarn,which directly affects the fabric appearance.The paper discussed the influence of spinning process parameters and the resurgence to the skewing.The experimental result showed that the following measure can improve the chip skew phenomena,such as twis…
We outline theoretically Bloch wall in nematic liquid crystal cell with the applied field.Two types of vertical alignment(VA) cell filled with negative liquid crystal are studied experimentally.Both types of liquid crystal cell have vertical alignment layer of polyimide(PI).One type of the cell uses the technological…