Materials Literature
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Pure titanium shows very interesting characteristics such as high strength-to-weight ratio, very good corrosion resistance and excellent biocompatibility, which make this material appropriate for use in orthopedic and dental implants. Due to the mechanical properties of pure titanium, its use in implants is restricted…
The mechanism of cathodic disbonding of three-layer polyethylene (PE)-coated steel pipe composed of liquid epoxy primer, adhesive PE, and a PE protective layer at an elevated temperature was investigated in sodium chloride (NaCl) solution. Cathodic disbonding tests were carried out to determine the route by which the…
A computer simulation study of the phase behavior of the dipolar Gay–Berne liquid crystal model is presented. The phase transitions are determined with isothermal–isobaric (NPT) Monte Carlo simulations, utilizing the reaction field method. The electrostatic forces are found to have a considerable effect on the nature…
Polyester based polyurethanes were synthesized from low molecular weight polyester (Mn 2000) and 4,4′-methylene bis(phenyl isocyanate) (MDI) with butanediol as a chain extender and glycerol as a crosslinker. The polyester was synthesized from adipic acid and glycol which was a mixture of 1,6-hexanediol and 1,2-propane…
Abstract A radially vibrating horn is studied as a possible system for scaling up sonochemical reactors. The anisotropic behavior of this horn was demonstrated, as were strong correlations among the acoustic field, the acoustic streaming, and the sonochemical reactivity. A comparison with the classic laboratory horn e…
Epitaxial films of La0.7Ca0.3MnO3 have been irradiated with 90 MeV oxygen ions at different dose values ranging from 1011–1014 ions/cm2. The structural, magnetization, and magnetotransport properties have been studied as a function of the ion dose. It is found that the properties change gradually up to a dose of 1013…
Highly oriented thin film In 2 O 3 was heteroepitaxially grown on an optically polished (001) plane of single crystalline yttria stabilized zirconia (YSZ) substrate using molecular beam epitaxy (MBE). The full-width at half maximum (FWHM) of the X-ray rocking curve was 0.08° for 200-nm-thick In 2 O 3 layers indicating…
Incorporation of emission properties into organic liquid crystals (LCs) is currently an active area of research. The authors present the first example of a functional phasmidic LC with intrinsic luminescence properties. It is shown that organization in the solid state—the Figure indicates the average ordering of hexac…
The miscibility of blends of poly(vinyl alcohol) (PVA) with chitin-graft-poly(2-ethyl-2-oxazoline) (1) and poly(2-ethyl-2-oxazoline) homopolymer (PEtOZO) was investigated. Calorimetric results showed a single glass transition temperature (Tg) in the entire range of compositions for both blend systems, which indicated…
Abstract The durability of high‐density polyethylene (HDPE)/ paraffin blends as a thermal energy storage material was studied by investigation of the seepage behavior of paraffin. The HDPE in the blends serves to prevent paraffin seepage during repeated heating‐cooling cycles; i.e., the HDPE acts as a sealant material…
This work describes the synthesis and properties of a material with unusual photophysical behavior. The material, a gel, is made by interaction of (3-aminopropyl)triethoxysilane with a carboxylic acid under oxygen- and water-free conditions through a sol−gel process, and it emits different colors by excitation at diff…
The effect of the amount of in situ formed graft copolymers on the blend morphology was investigated for immiscible polymer blends of poly(butylene terephthalate) (PBT) and polystyrene (PS) having various amounts of poly(styrene- ran -glycidyl methacrylate) (PS-GMA) as an in situ compatibilizer. Two different blending…
The influence of three macrocyclic compounds on corrosion of mild steel (MS) in hydrochloric acid (HCl) was investigated using weight loss, potentiodynamic polarization, alternating current (AC) impedance, and hydrogen permeation techniques. All the investigated compounds showed significant efficiencies and reduced pe…
The perovskites $\mathrm{Ca}({\mathrm{Mn}}_{3\ensuremath{-}x}{\mathrm{Cu}}_{x}){\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$ and $A{\mathrm{Cu}}_{3}{\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$ $(A=\mathrm{Tb},$ Tm) have been synthesized using different processes and their magnetic and transport properties investigated. ${\mathrm{CaMn}}_…
The membranes tested in the present study were cellulose triacetate (CTA), polymethylmethacrylate (PMMA), and polyacrylonitrile (PAN). The adsorption by each membrane of albumin, IgG, C3a, interleukin-1beta (IL-1beta), interleukin-6 (IL-6), human neutrophil elastase (HNE), and tumor necrosis factor alpha (TNFalpha) wa…
Valve morphogenesis starts when the silica deposition vesicle (SDV) expands across a cleavage furrow covered by an unidentified layer, which may aid in its shaping. A labiate process (LP) is present only in the outer valve of terminal cells in the filament. Before these particular cells form setae, a layered “labiate…
The binding of lysozyme to bacterial deep rough mutant lipopolysaccharide (LPS) Re and to its lipid moiety lipid A, the 'endotoxic principle' of LPS, was investigated using biophysical techniques. The beta<-->alpha gel to liquid crystalline phase transition, the nature of the functional groups of the endotoxins, the s…
The modelling and experimental results of deformations of elastomeric rods with embedded two-way shape memory effect actuators is presented in this work. A procedure is established to train Nitinol shape memory alloy (SMA) wires to exhibit the two-way shape memory effect, a hysteretic behaviour involving a thermally i…
Pattern formation at the solid-liquid interface of a growing crystal was studied in directional solidification using a perturbation technique. We analyzed both experimentally and numerically the stability range and dynamical selection of cellular arrays of ``doublets'' with asymmetric tip shapes, separated by alternat…
In this work, we study the phase separation of deeply quenched mixtures in which the diffusion coefficient depends on the local composition field $\ensuremath{\varphi}.$ In one dimension (1D), the system evolves until it reaches a spatially periodic steady state, with a period that, for instant quenching, coincides wi…