Materials Literature
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Trace elements may be present in solution with positive or negative charges and in different redox state. They occur predominantly in cationic form (Pb, Cu, Zn, Ni, Cd, Hg, Cr(III), Co) but some trace elements are present in anionic form (As, Se, Cr(VI), Mo and B). In soil environments, sorption/desorption reactions o…
The corrosion of five copper-based archaeological artefacts originating from Tell el-Ajjul in Gaza was investigated to determine their state of preservation and conservation needs. Elemental composition and microstructure were studied to determine the type of alloy and manufacturing technique. Preliminary condition as…
In this paper we are interested in the finite-time stability of transition solutions of the Cahn-Hilliard equation and its connection to the Willmore functional. We show that the Willmore functional locally decreases or increases in time in the linearly stable or unstable case respectively. This linear analysis explai…
ZnO thin films could be fabricated on soda lime glass substrates by sol-gel dip coating method. The thin films fabrication conditions were zinc acetate concentration of 0.10-0.50×103 mol/m3, withdrawal speed of 0.5-1.5×10-3 m/s and calcination temperature of 500°C. The film characteristics (roughness, transparency and…
Group III-V (13-15, III = Ga, In, and V = P, As) semiconductor nanocrystals were effectively obtained via a developed Ullmann reaction route through the reactions of preformed nanoscale metallic indium or commercial gallium with triphenylphosphine (PPh(3)) and triphenylarsine (AsPh(3)) in sealed vacuum quartz tubes un…
By sequential ring-opening polymerization of ethylene oxide and epsilon-caprolactone, poly(ethylene oxide) (PEO)-poly(epsilon-caprolactone) (PCL) di-block co-polymers with a phosphoryl choline (PC)-terminated group were synthesized. Using FT-IR, NMR, DSC and SEC, the products were characterized and the results proved…
Direct polymerized polyaniline (PANI) nanostructures, i.e., nanospheres (NSs) and nanorods (NRs), are grown using different precursor conditions via electroless surface polymerization and examined by scanning electron microscopy images, attenuated total reflectance-fourier transform infrared spectroscopy. Due to exces…
We propose a high-temperature actuator composite material composed of a high temperature shape memory alloy (HTSMA) TiAu with a high martensitic transformation temperature (Ms=880 K) and ferromagnetic cobalt with a high Curie temperature (TC=1388 K). This actuator material can be driven by magnetic field in a bending…
To study the fracture behaviour of nuclear graphite, a full-field digital image correlation technique has been applied to large specimens of isotropic Gilsocarbon graphite. Optical images of the tensile surface in four-point bend tests were recorded throughout the loading history, with a 100 × 100 mm viewing area. Alt…
Raman scattering measurements were performed in the benitoite-type BaTiSi3O9, BaZrSi3O9, BaSnSi3O9 and tetragermanate-type BaGe4O9 phases in order to elucidate the spectroscopic and structural features of D2/vG(T3O9)-type compounds (expressed by Smith's notation) with the GO6 octahedral unit isolated by the T3O9 ring.…
We have studied the mechanisms underlying the formation of corundum crystals from hydrargillite and boehmite during thermal and vapor heat treatments and have identified the major stages in the formation of corundum structure, thought of as the evolution of the system toward the most thermodynamically stable state. Th…
Ta2O5 substituted polycrystalline BaTi2O5 (BT2T) was prepared from the raw materials of BaCO3, TiO2 and Ta2O5 by arc melting on a water-cooled copper plate in the nominal composition of Ba(Ti1-1.25yTay)2O5 (y=0 to 0.050). At y< 0.050, the main phase of the obtained specimens was BT2T which crystallized in a monoclinic…
Abstract. We investigate the relation between changes in dynamic and thermodynamic anomalies arising from the presence of the liquid-liquid critical point in (i) Two models of water, TIP5P and ST2, which display a first order liquid-liquid phase transition at low temperatures; (ii) the Jagla model, a spherically symme…
The boron cathodic arc ion source has been developed with a view to several applications, particularly the problem of shallow junction doping in semiconductors. Research has included not only development and operation of the boron cathode, but other cathode materials as well. Applications have included a large deposit…
In the present study manganese oxidizing bacteria \n(MOB) were isolated and identified using molecular \ntechniques (16S rRNA gene sequencing) and the electrochemical behaviour of these isolates on orthodontic \nwires was studied by employing polarization and impedance \ntechniques. Staphylococcus aure…
<JATS1:p>Stretch fabrics are more popular than ever, from Juicy Couture's sweats to the trendy, ready-to-wear styles found at H&M. Stretch fabrics have long been a staple of designer fashion as well–from Missoni's colorful knits to Donna Karan's basics. Designing and Patternmaking for Stretch Fabrics provides the…
This study was conducted to investigate the effect of DLC (diamond-like carbon) coating and a hybrid surface modification composed of plasma carburizing and DLC coating on the fatigue properties of Ti-6Al-4V alloy. In the hybrid surface modification, plasma carburizing at the first stage was conducted to generate a ha…
Thermoelectric materials can be employed to develop thermoelectric power generation modules used to convert heat flow into electricity without any moving parts. Increasing the efficiency of these devices is of high interest for application in waste heat recovery and power generation. The focus of this book is in the f…
微弧氧化(毛) 的性质上的稀土元素的效果镁合金上的涂层借助于扫描电子显微镜学(SEM ) 被调查，精力散 X 光检查光谱学(版本) ，和电气化学方法。当镁合金在硝酸盐答案被当作毛的预告的处理时，结果证明好、紧缩的毛涂层成功地被获得。然而，毛成功地没与稀土元素的增加为硅酸盐电解质被完成。在被稀土元素硝酸盐对待的镁合金以后，获得的毛涂层有象厚度，改进腐蚀抵抗，和好制服的表面的一致分发那样的优点，作为与未经治疗的镁合金相比。另外，毛过程的 non-ESP，电压和电流密度的时间显然减少。在镁合金的表面上做的二氧化铈能显著地改进毛涂层和减少的腐蚀电阻毛过程的电流密度作为与氧化镧相比，而做的稀土元素没在毛涂层的部件上有重要效果。
The synthesis of novel aromatic diamine compounds containing phosphorylcholine (PC) group was carried out, which gave the high molecular weight polyamides with PC group by polycondensation. The obtained polymers exhibited the excellent biocompatibility, which would be due to the surface structure derived from PC side…