Materials Literature
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Microfibrillar composites (MFCs) based on polypropylene and poly (ethylene terephthalate) were prepared by a three step process namely blending (extrusion), fibrilization (drawing) and isotropization, using different draw ratios (viz. 2, 5, 8 and 10). The drawn (stretched) blend was injection moulded at a temperature…
Crystal structures of a series of free base porphyrins, 2,3,12,13-tetra(cyano/chloro/bromo)-5,7,8,10,15,17,18,20-octaphenylporphyrin solvates [H(2)(TPP(Ph)(4)(CN)(4)) x 3 (C(2)H(4)Cl(2)), H(2)(TPP(Ph)(4)Cl(4)) x 2 (CH(3)OH), and H(2)(TPP(Ph)(4)Br(4)) x 2 THF x 1.5 (CH(3)OH)], were determined to examine the influence o…
Influence of graft copolymers with different architecture on spontaneous batch crystallization of calcium oxalate was investigated. The series of water-soluble polyethyleneglycol methacrylate-vinylsulfonic acid graft copolymers [(PEG-MA)-co-VS] and homopolymer of vinylsulfonic acid have been made, by radical polymeriz…
We have investigated an array of magnetoelectric (ME) detection sensor units and an equivalent scheme by which to model their magnetic-field detection sensitivity. The signal response, noise level, and signal-to-noise ratio (SNR) of an array ofmunits connected in parallel and serial modes have been analyzed. Our resea…
An adsorbed layer of a cationic polyelectrolyte, poly(diallyldimethyl-ammonium) chloride (PDADMAC) on negatively charged colloidal latex particles was investigated by small-angle neutron scattering (SANS) and dynamic light scattering (DLS). SANS gives a layer thickness of 8 +/- 1 A and a polymer volume fraction of 0.3…
Abstract A family of aluminum complexes containing anilido‐oxazolinate ligands are described. Reactions of five anilido‐oxazolinate ligand precursors, HNPh TriMe Oxa, HNPh Di i Pr Oxa, HNPh OMe Oxa, HNPh SMe Oxa, or HNPhOxa, with 1 molar equiv. of AlMe 3 in toluene give the aluminum dimethyl complexes (NArOxa)AlMe 2 […
The iron arsenide CaFe(4)As(3) features a three-dimensional network derived from intergrown Fe(2)As(2) layers and Ca ions in channels. Complex magnetic interactions between Fe atoms give rise to unexpected transitions and novel direction-dependent magnetic behavior.
We study under which conditions extraordinary optical transmission (EOT) structures can be used to build negative refractive index media. As a result, we present a metamaterial with superimposed EOT and negative index at visible wavelengths. The tailoring process starting from a simple hole array until achieving the n…
This study was conducted to evaluate the effects of organic acids on the concentrations of metals and anions in soil solution. Three soils with contrasting CaCO3 contents were extracted with organic acid solutions (citrate and oxalate) of different concentrations for different time periods and analysed for Fe, Mn, Zn,…
The prediction of tritium retention in ITER relies on the extrapolation from present data. An empirical equation was proposed in (De Temmerman G. et al 2008 Nucl. Fusion 48 075008 ) to account for the influence of the beryllium deposition rate, the substrate temperature and the average energy of the deuterium neutrals…
At the crossroads: A unique carbon-bridged annulene motif--dehydroquatyrin--is imprinted into the molecular structure of the tetraazuliporphyrin tetracation (see picture). The macrocycle, which lies at the intersection of annulene, carbocation, and porphyrin chemistry, is obtained by the standard condensation of azule…
The fluctuation dissipation theorem is studied close to the glass transition in colloidal suspensions under steady shear. Shear breaks detailed balance in the many-particle Smoluchowski equation and gives response functions in the stationary state which are smaller at long times than estimated from the equilibrium flu…
Mixed-layer compounds from the tetradymite group, in the range Bi 2 Te 3 -Bi 8 Te 3 , were studied by HRTEM. The formula S′(Bi 2k X 3 )·L′[Bi 2(k+1) X 3 ] (X = chalcogen; S′, L′ = number of short and long modules, respectively) was introduced as a working model. Diffraction patterns show that all phases are N-fold (N…
We report photoluminescence (PL) spectral switching of quantum dots (QDs) by chemically controlling transfers of electrons in and out of the type-II heterostructures. When electron charged, CdTe/CdSe (core/shell) QDs show huge PL blue shifts (up to ∼100 nm) whereas PL of CdSe/CdTe (core/shell) QDs red-shifts. We demon…
Ascorbic acid has been shown to stimulate collagen synthesis in dermal fibroblasts by increasing the rate of transcription of collagen genes. Experiments involving the use of ascorbic acid require daily supplementation due to the instability of the molecule in aqueous solutions. In order to provide a more stable alter…
We report the discovery of re-entrant ferroelectricity in the phase diagram of multiferroic Fe-substituted MnWO 4 . At zero magnetic field ( H ) the spin-spiral ferroelectric (FE) state is completely suppressed at Fe substitutions ( x ) exceeding 0.04. For x <0.04 a zero-field ferroelectric phase exists in a narrow te…
Three new pyridylbis(phenol) ligands with imine (H(2)L(imine)), amine (H(2)L(amine)), or amide (H(4)L(amide)) linkages, along with their copper complexes, were synthesized and characterized. Treatment of H(2)L(imine) with copper(II) in the presence of base produced mononuclear copper complex [Cu(L(imine))(MeOH)] (1),…
BACKGROUND: In vitro studies have shown that the 3-Tesla (T) magnetic resonance (MR) characteristics of high- and standard-molar gadolinium-based contrast agents differ. Such differences may indicate that high-molar (1.0 M) agents offer advantages for perfusion-weighted imaging (PWI) at 3T, as has been previously repo…
This paper investigates the possibility of applying the time enlargement law for predicting how gas-insulated systems would behave when exposed to pulse voltage loads of different shapes. For this purpose, the validity of the time enlargement law in this case has first been tested and the most suitable theoretical dis…
In this report we evaluate the emission properties of single quantum dots embedded in a thin, thiol containing polymer film. We report the suppression of quantum dot blinking leading to a continuous photon flux from both organic and water soluble quantum dots and demonstrate their application as robust fluorescent poi…