Materials Literature
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Synthetic and structural studies of Cr horseshoes are reported which show that these compounds demonstrate a rich supramolecular chemistry through H-bonding interactions, and can act as ligands for metal clusters.
Thermosensitive liposomes (TSL) with encapsulated proton (1H) magnetic resonance (MR) contrast agents have been proposed for noninvasive online temperature monitoring during tumor treatment using chemotherapy combined with hyperthermia (HT). The technique exploits the fact that water exchange between the TSL interior…
Tensile creep tests have been carried out for the die-cast AM50 + xCa (x=0.47, 0.95 and 1.72 mass pct) alloys in the temperatures between 423 and 523 K to elucidate the effect of calcium additions on creep properties for the AM50 alloy. The creep curve for the AM50 + xCa alloys is characterized by a minimum in the cre…
The purpose of this investigation is to characterize nevirapine from commercial samples and samples crystallized from different solvents under various conditions. The solid-state behavior of nevirapine samples was investigated using a variety of complementary techniques such as microscopy (optical, polarized, hot stag…
A europium-sensitized fluorescence spectrophotometry method using an anionic surfactant, sodium dodecyl benzene sulphonate (SDBS), was developed for the determination of gatifloxacin (GFLX). The GFLX-Eu3+-SDBS system was studied and it was found that SDBS significantly enhanced the fluorescence intensity of the GFLX-E…
Abstract A unified equation on the viscosity of pure liquid metals (published recently by the author) is combined with the well-known Sutherland – Einstein equation to obtain a new equation for the temperature dependence of the self-diffusion coefficients of pure liquid metals. The equation does not contain new adjust…
Abstract Emissive properties of ZnO are of great interests in terms of the UV LED device design. The persistent “green” luminescence due to deep defect is an obstacle for obtaining an intense UV emission, expected from ZnO. We report the positive role of thermally diffused H toward quenching the defect emission in ZnO…
Nanostructured manganese oxide films for electrochemical supercapacitors were obtained by cathodic electrosynthesis from aqueous NaMnO 4 solutions. The proposed deposition mechanism is based on cathodic reduction of MnO 4 − species. The amount of the deposited material has been controlled by the variation of depositio…
A model for diffusion and phase separation which takes into account relaxation of the atomic diffusion flux to its local equilibrium state is explored. This model is described by a partial differential equation of a hyperbolic type that can be called “a hyperbolic model for spinodal decomposition&amp…
The advanced design of fuel‐cell vehicles requires high‐pressure low‐temperature hydrogen systems, which in turn requires a high‐pressure low‐temperature mechanical properties database to address hydrogen embrittlement issues. A very simple and safe mechanical properties testing procedure to evaluate low temperature h…
Nearly 30 years ago, we reported on a concept now known as Tissue Engineering.Here, we report on some of the advances in this now thriving area of research.In particular, significant advances in tissue engineering of skin, liver, spinal cord, blood vessels, and other areas are discussed.
SUS304 austenitic stainless steel was deformed by high pressure torsion (HPT) at room temperature at different the rotation speed. By using X-ray diffraction (XRD) and transmission electron microscopy (TEM), the quantitative phase analysis and microstructural evolution along the progress of HIPT were investigated. The…
In this study, the new oligomer Schiff base oligo-N,N′-bis (2,4-dihydroxybenzylidene) ethylenediamine (O-DHBEDA), with a double azomethine group, was synthesized by oxidative polycondensation (OP) of N,N′-bis (2,4-dihydroxybenzylidene) ethylenediamine (DHBEDA) with NaOCl as an oxidant in an aqueous alkaline medium at…
Effects of Si on the repassivation kinetics and stress corrosion cracking ͑SCC͒ of alloy 304Si were examined by a scratch electrode technique and slow strain rate test in chloride solutions and compared with those of other stainless steels ͑SSs͒, 304 and 316L.Repassivation kinetics of these alloys and Fe-20Cr-xSi ͑x =…
A novel, simple, and scalable technique to control the formation of the nanofibers of polyaniline and its derivatives via porous membrane controlled polymerization (PMCP) is reported. Through appropriate synthesis conditions, there are nearly 100% nanofibers formed with diameters tunable from 20nm to 250nm via the sel…
The green coloured micro-phenoxo, micro-chloro and micro-phenoxo, micro(1,1)-azido bridged complexes of formula [Ni2(L)(Cl)(H2O)] x (C2H5)2O, 1 x (C2H5)2O, and [Ni2(L)(N3)(H2O)] x CH3OH x H2O, 2 x CH3OH x H2O have been synthesized, where L3- is the deprotonated form of 2,6-bis[N-(2-hydroxybenzyl)-N-{2-(dimethylamino)e…
The adsorption of 1 – phenyl–3- methylpyrazol – 5-one (HPMP) on mild steel surface from 0.5 M HCl solution was studied by using gravimetric technique. The values for free energy of adsorption, ΔGads0, were calculated at each surface coverage, θ, of the studied compound by applying themathematical model of Bockris – Sw…
We have synthesized a peptide-based supramolecular building block consisting of a cyclic Arg-Gly-Asp (cRGD) peptide segment and a beta-sheet-forming peptide segment. The block peptide was shown to self-assemble into a cRGD-coated nanoribbon structure, as revealed by circular dichroism (CD), dynamic light scattering (D…
OBJECTIVE: Human skin is a complex bilayered organ that serves as a protective barrier against the environment. The loss of integrity of skin by traumatic experiences such as burns and ulcers may result in considerable disability or ultimately death. Therefore, in skin injuries, adequate dermal substitutes are among p…
The recently developed class of artificially structured composite materials, termed metamaterials, has shown increasing importance in accomplishing necessary functional devices for THz applications. We have created a series of novel planar electric metamaterials operating at THz frequencies. Alteration of substrate pr…