Materials Literature
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Under the view of mechanics of materials,the one-dimensional thermal stress problem of a functional gradient beam is studied.To make the analysis tractable,the properties of the functionally graded beam,such as elastic modulus and coefficient of linear thermal expansion,are assumed in power forms and vary the principa…
Millable polyurethane rubber(MPU)was modified to reduce its friction coefficient by adding ultrahigh molecular weight polyethylenes(UHMWPE)and maleic anhydride-grafted polythene(PE-g-MAH).The friction coefficient,surface energy and tensile properties of the blend were influenced by the adding amount of UHMWPE and PE-g…
The deterioration level of the magnetic properties of motor iron core due to its size reduction after punching was quantified.The internal causes for the magnetic property deterioration,including the changes of shearing surface and internal texture,were researched.The results show that during the manufacture of the ir…
The surface roughness of biomaterial is one of the important factors which affect the cell behavior.In order to regulate the surface roughness of silk protein biomaterials and evaluate the effects of the surface roughness of material on cell growth behavior,Antheraea pernyi silk sericin(AS)solution was used as the tem…
Dialysis was utilized to separate gelatin whose relative molecular mass is over 3500 from a simulated copper electrolyte,and the concentration of separated gelatin was determined with a bicinchoninic acid( BCA) method. The impact of H2SO4 concentration and temperature on gelatin degradation was investigated. It was fo…
The interaction potential energy of Ne-HCN complex was calculated using the single and double excitation coupled-cluster theory [CCSD( T) ] with a large basis set( aug-cc-PVQZ) containing the bond function set 3s3p2d2f1 g. The potential energy surface is calculated with the HCN bond lengths fixed. The potential energy…
The corrosion inhibitor molecular structure design was made based on the metal corrosion mechanism in the salt water.The effects of the materials' ratio,reaction time and temperature on performance of corrosion inhibitor were studied in the article.FT-IR was used for the qualitative analysis about AGE's structural cha…
Effects of quenching and tempering heat treatment on microstructure and properties of X100 pipeline steel were investigated by means of SEM,TEM,tensile test and instrumented impact test. The results show that thermo mechanical control process( TMCP) plate after tempering at 450 ℃,the yield strength( Rt0. 5) reduces fr…
The effect of different Si contents on the mechanical properties of iron-based alloys and their corrosion resistance in 20% nitric acid are studied in this paper. Experimental results show that with the increase of Si content, the impact toughness of iron-based alloys decreased but the hardness increased. In the immer…
The full length cDNA of arginine kinase gene(HdAK)from Haliotis diversicolor was cloned for the first time by SMART-RACE method.The mRNA expression levels of HdAK in examined tissues and in gill and haemocytes under thermal stress,hypoxia exposure,thermal plus hypoxia stress and the injection of Vibrio parahaemolyticu…
Objective To investigate the effects of triptergium wilfordii polyglycosidium on the secretion of vascular endothelial growth factor from mononuclear-macrophages in acid oral squamous-cell carcinoma microenvironment. Methods ELISA assay was used to evaluate the effects on the secretory of VEGF in THP-1 monocytes,co-cu…
By using X ray diffraction(XRD) and scanning electron microscope(SEM) technologies,a comparative analysis was performed on the microstructure and phase state in two kinds of paste prepared and cured at normal atmospheric temperature and high temperature, and also in both green plates and formed plates related to the p…
In this research,calcium pimelate coated nano-silica( β-Si O2) was prepared,which has the β-nucleation effect on PP. The influence of β-Si O2 on crystalization and melting behavior of PP was investigated by DSC and XRD. The content of calcium pimelate in β-Si O2 was analyzed by TGA. The results indicated that β-Si O2…
This paper introduces the technical process of leaf fiber fabric impregnating and the working principle of impregnation machine. The design method and structure of rewinding roller,belt tension adjustor,installation and disassembling special tooling of rollers,mobile glue groove,squeeze rollers and other related compo…
To mimic the catalytic cavity site of Cytochrome P- 450 enzyme,promoting the activity of chitosan grafted manganese tetra( p-carboxylphenyl) porphyrin( Mn TCPP). Nan-porous chitosan( np-CTS) was prepared by freeze drying method,to which was the Mn TCPP grafted by acylation,forming biomimetic catalytic material,Mn TCPP…
TiH2/SiC powders were stirring milled, and then pressed and sintered in vacuum to produce bulk titanium material. Furthermore, the effects of the ball material ratio, rotating speed of ball mill, ball grinding time and other process parameters on particle size and microstructure of the milled powders were investigated…
Bi2O3- Ni2O3 nanometer powders were prepared by organic method,and their structures were characterized. Using the prepared Bi2O3- Ni2O3 powders as photocatalyst,the factors affecting the photocatalytic oxidation of benzene were studied. The results show that: The preparation of nanometer powder is made up of Bi2O3 and…
Layer of Ni-Fe was synthesized on stainless steel and deposited on sample with using the chemical sol-gel and dip coating routes, respectively. Nano crystallite and amorphous structures thin layers were investigated with atomic force microscopy (AFM), energy dispersive x- ray (EDX), scanning electron microscopy (SEM)…
Zinc PASP monohydrate is synthesized with PASP and zinc sulphate as raw materials, thestructure of the complex is characterized by powder X-ray diffraction, infrared spectrum, andthermo-gravimetric. The results show that: the yield is over 97.1% at conditions of the PASP to zincsulphate molar ratio of 1∶ 1, p H of 5.0…
To study the rotary penetration effect of grooved projectile,the rotary penetration process of grooved projectile was analyzed,and the experiments of ogive-nosed and grooved projectiles rotationally penetrating into aluminum targets at the impact velocity from 400m/s to 700m/s were carried out.The rotary penetration p…