Materials Literature
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The synthesis is reported of a series of metalloporphyrins (and the corresponding free-base porphyrin), mono-meso-substituted with a bipyridyl group via an amide link at the 4-position of one phenyl group: [Re(CO)(3)(Pic)Bpy-MTPP][OTf], where M = Mg, Zn, Pd or 2H, Pic = 3-picoline, Bpy = 2,2'-bipyridine, TPP = tetraph…
Silica nanowires are one-dimensional nanomaterials that are being developed for use in biological systems. Unfortunately, little is known regarding the cytotoxic potential of this type of nanomaterial. Here, using two different human epithelial cell lines we have examined the cytotoxicity of silica nanowires over a br…
Porous silicon (PS) samples were obtained by anodization etching process of n-type silicon wafer phosphorus-doped. Electrochemical oxidation of PS was investigated in aqueous hydrofluoric acid (HF) containing additive such as ethanol or acetonitrile. Pore formation was studied with the variation of type and resistivit…
A new method for the synthesis of biocompatible and multifunctional semiconductor ZnO quantum dots (QDs) through reaction of oleate-capped ZnO QDs with a poly(ethylene glycol)-siloxane is reported. The size, shape, crystal structure and the optical properties of water-soluble ZnO QDs were characterized by atomic force…
Azobenzene derivatives can be used to reversibly photo-regulate conformation and activity when introduced as intramolecular bridges in peptides and proteins. Here we report the design, synthesis, and characterization of an azobenzene derivative that absorbs between 400-450 nm in aqueous solution to produce the cis iso…
SCK nanoparticles having differing core thermal characteristics were designed and evaluated as thermoresponsive drug delivery systems of doxorubicin for the killing of cancerous cells.
The different complexation methods of a proton transfer compound, (creatH)(pydcH)·H 2 O (pydcH 2 = pyridine-2,6-dicarboxylic acid; creat = creatinine) with metal ions have been studied and formation of [(Tl(pydcH)] n (1), [(Fe(pydc)(H20)2)20x]·6H 2 O (2), [Cu(pydc)(pydcH 2 )]·2H 2 O (3) and (creatH)2[Bi(pydc)2]2'4H20…
The solvated yttrium iodide precursors [Y(L)(8)]I(3) (L = DMSO or DMF), prepared in situ by stirring YI(3)(Pr(i)OH)(4) in DMSO or DMF, react with CuI in the presence of NH(4)I to give ionic hetero-metallic species [Y(DMSO)(8)][Cu(2)(mu-I)I(4)] (1) and [Y(DMF)(8)][Cu(4)(mu(3)-I)(2)(mu-I)(3)I(2)] (2) in excellent yields…
The influence of hydrocarbon-containing fuel gases on cell performance and coke formation is investigated in this work, wherein acetylene is applied as a model compound for the coke formation. The dependence of coke yield on acetylene amount (volume fraction of 0.05–0.50%) and gas composition is analyzed. Further para…
Partial discharge (PD) is an important indicator of insulation condition in a power transformer. The PD phenomenon is exhibited in various observable forms such as electrical, mechanical, optical and electromagnetic energy. Many modern systems use a combination of these techniques, because electrical detection is a pr…
The anterior cruciate ligament (ACL) is important for knee stability and kinematics. Unfortunately, it is also the most commonly injured ligament of the knee and due to its poor healing potential, severe damage warrants surgical intervention including complete replacement. Current ACL replacements have a host of limit…
This work devotes to investigate synthesis and electrical properties of spinel MgCo2O4 that is considered as a candidate of the cathode materials of magnesium-ion batteries in future. Samples were synthesized by two types of techniques: solid-state reaction and wet process. The crystal structures of the samples were a…
Mesoporous SiO2/Ni3Si2O5(OH)4 core-shell microspheres with tunable chamber structures have been synthesized by the reaction between Ni(Ac)2.4H2O and SiO2 microspheres via a simple self-template approach.
Blends formed by electrochemical polymerization of polypyrrole (PPy) into polyacrylamide (PAAm) hydrogels were used as devices for controlled drug release. The influence of several parameters in the synthesis, such as type of hydrogel matrix and polymerization conditions was studied by using a fractional factorial des…
A series of PCL-based shape memory polyurethanes was synthesized via bulk pre-polymerization. Their thermal, mechanical properties, shape memory properties, softening and hardening processes were investigated by the experimental approach and made comparison with a commercially available orthotic material. The cytotoxi…
We present a facile, room temperature and “fully liquid” method to specifically produce either copper nanoparticles or thin conductive copper films on silicon substrates by using a dedicated reduction process of mesitylcopper by H2 or an aminoborane.
The anatomy and the physical, mechanical, acoustical and chemical properties of pernambuco wood ( Caesalpinia echinata Lam.) were investigated to determine factors that could explain the different quality of sticks used in bow manufacture. Eighteen sticks were classified into four classes (A to D with A being the best…
Fibrinogen (Fg) nanofibrils were prepared by the ethanol-induced self-assembly of Fg molecules, which can be used as fibrous scaffolds to organize gold nanoparticles (NPs).
Abstract First-principle pseudopotential plane wave calculations and the Nudged Elastic Band method based on density functional theory (DFT) have been used in this article to study the dissociation of molecular hydrogen on a Mg(0001) surface and the subsequent diffusion of atomic hydrogen into the magnesium substrate.…
The compressive stress-strain loops of several commercial polymers at strain rates of nearly 700/s are determined in the standard split Hopkinson pressure bar. Four different polymers or typical thermoplastics: ABS, PA-6, PA-66 and PC are tested at room temperature. Cylindrical specimens with a slenderness ratio (= he…