Materials Literature
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The X-80 steel chemistry has been modified by increased Mn, Cr and Mo that decrease BS, and two groups of leaner base chemistries have been used with low carbon (LC) and high carbon (HC) that correspond to 0·04 and 0·07 wt-%C respectively. The alloy design approach is to lower BS and to provide offsetting decreases to…
The preparation and performance of hypoxanthine (Hx) electrochemical biosensor, which was based on iron (III) meso‐tetraphenylporphyrin (FeTPP) nanoparticles (NPs), is reported in this work. FeTPP NPs prepared by mixing solvent techniques with diameters ca. 25~45 nm and were used as a mediator. The XOD/FeTPPNP/GC elec…
Polystyrene waste was depolymerised by using various acidic and basic catalysts. Among the metal oxides, calcium oxide was found to be the cheapest and most effective catalyst for the depolymerization of waste polystyrene into styrene. Metal carbonates provided pure styrene, but in low yields. Acids were found to be p…
In this paper design consideration for a fuel cell powered, passive stand-by single-phase UPS system is detailed. A commercially available Ballard Nexa (43-26 V, 1.2 kW) PEMFC fuel cell along with suitable DC/DC and DC/AC power electronic converter modules is employed. The proposed topology provides stable power to th…
There is increasing interest in developing cell-based therapies to regenerate functional muscle and blood vessels in infarcted dysfunctional myocardium, using stem cells resident in the adult heart. The objective of our study was to identify an easy and cost-effective method for the isolation and expansion of human ad…
The charge neutral anthracene based chiral fluorescent receptors 4a and 4b containing thiourea and amide groups were synthesized by simple steps in good yields, and their enantioselective recognition for chiral dicarboxylic anions (L/D-malate, L/D-aspartate, and L/D-glutamate) were examined by UV–vis, fluorescence, an…
The development and optimization of biomimetic surfaces required for biosensors and medical assays are made more efficient by quantitatively monitoring the surface chemical reactions in situ by means of attenuated total reflection (ATR) FTIR spectroscopy. single-beam-sample-reference (SBSR) ATR, as well as modulated e…
Magnetotransport data of individual Sn doped In 2 O 3 nanowires were investigated at low temperatures in order to study the characteristic dimensionality of the conduction process and the electron dephasing mechanisms. The magnetoconductance data obtained in these nanowires confirm the theoretical predictions of one-d…
Carbon Nanotubes (CNTs), single‐, double‐, and multiwalled can be easily suspended up to 10 mg/ml in biocompatible carboxymethylcellulose or κ‐carrageenan as these polymers are envisioned to wrap themselves around CNTs effectively forming aqueous solutions. Glucose oxidase was used as a model to show the biocompatibil…
To study the interaction of Ge atoms with titania (TiO 2 ) nanoparticles, we synthesized Ge-doped titania films by sol–gel method. The structural properties of Ge-doped titania films describe us that Ge ions (Ge 4+ ) could be incorporated in the TiO 2 lattice by substituting Ti ions (Ti 4+ ). Introduction of Ge 4+ mak…
On the nano scales, continuum hypothesis is invalid. Differential-difference model is proposed for nanohydrodynamics and nano heat/electron conduction in carbon nanotubes.
An accurate computation of the near-field enhancement is a key factor for the optimization of nanostructures in plasmonics. This problem has been addressed for Green's dyadic method but remains open for finite element method (FEM) where the use of non-Cartesian meshes is known to be the most efficient. We present a ne…
The transient response of a simply supported layered cylinder made of a three-phase magneto-elecro-elastic (MEE) composite, consisting of an elastic matrix reinforced with piezoelectric and piezomagnetic fiber has been studied by developing a semianalytical finite element method employing fourth-order Runge–Kutta meth…
We presented the results of electrical and optical studies of the properties of In x Ga 1-x N epitaxial layers (0.060 ≤ x ≤ 0.105) grown by metalorganic vapour phase epitaxy.Resistivity and Hall effect measurements of the samples were carried out at room temperature.Optical properties of the samples were characterized…
Surface roughness is known to play a significant role in the cell-surface attachment process, particularly when the surface irregularities are of a dimension that is comparable to the bacterial size and hence provide shelter from unfavorable environmental factors. To explore the influence of nano-scale surface roughne…
Este trabalho teve como objetivo avaliar a produção de matéria seca, o crescimento radicular e a absorção e distribuição do Ca, P e Al nas folhas, no caule e nas raízes de dois clones de café conilon (Coffea canephora) (Mtl 25 e Mtl 27) e de uma variedade de café Catuaí Amarelo (Coffea arabica), cultivados em solução…
We demonstrate organic photovoltaic cells composed of multi charge-separation (MCS) interfaces in the active layer for the improvement of power conversion efficiency (η P ). The MCS interfaces are composed of pentacene/C 60 and Zn–phthalocyanine (ZnPc)/C 60 by inserting thin layer of ZnPc at the CS interface between p…
Abstract An organophilic bentonite was prepared by means of a reaction of natural Na-montmorillonite with trimethyldococylammonium which has an especially longn-alkyl chain. The addition of trimethyldococylammonium to montmorillonite was in the range 0.25–3.0 times the cation exchange capacity (CEC) of the clay (i.e.0…
In a number of cases of practical interest, nucleation of freezing occurs at small supercooling, on potent nucleant substrates. Nucleation is then deterministic, consisting of the onset of free growth at a supercooling related only to substrate size and shape. Existing analytical treatments have evaluated the critical…
The epilithic diatom assemblages studied in the high mountain lake “La Caldera” (Granada, Spain) from 1996 to 1998 went through two clearly different stages. The initial one, in 1996, corresponded to the reflooding of the basin after a severe drought and was composed mainly of the colonising species Fragilaria rumpens…