Materials Literature
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We present a revised form of the Percus-Yevick approach applicable to dispersions of interacting colloidal particles such as colloid-polymer mixtures and square-well attractive colloids. Our approach is suitable for treating short-range interparticle potentials including excluded volume hard-sphere repulsion, short-ra…
Molecular dynamics of a series of poly(ethylene glycol)−poly(amidoamine) (PEG−PAMAM) dendrimer blends and PEG conjugated PAMAM dendrimers were investigated and contrasted using broadband dielectric relaxation spectroscopy (DRS). The study was carried with 2000 Da PEG and generation 3 PAMAM dendrimers. The results were…
Interleukin-1 alpha and beta (IL-1 alpha and beta), tumour necrosis factors alpha and beta (TNF alpha and beta) and interferon gamma (IFN gamma) were tested for their chemotactic effects, their effects on chemotactic movement towards N-formyl-methionyl-leucyl-phenylalanine (FMLP) and their effects on random locomotion…
The impact of interfacial surface roughness upon imaging characteristics in planar superlenses has been investigated using finite element method (FEM) modelling. Simulations have been performed across the surface roughness range of 0.1?1.5?nm root mean square (RMS) for single-?and dual-layer superlenses. For single-la…
Resonant x-ray emission spectroscopy (XES) measurements at Fe L(2,3) edges and electronic structure calculations for LiFeAs and NaFeAs are presented. Experiment and theory show that in the vicinity of the Fermi energy, the density of states is dominated by contributions from Fe 3d states. The comparison of Fe L(2,3) X…
Godlevskite Ni<sub>9</sub>S<sub>8</sub> has been found to be an OD (order-disorder)<sup> </sup>structure consisting of two kinds of OD layers in strict alternation;<sup> </sup>these layers display stacking disorder. They have layer symmetries<sup> </sup><em>P</em>(<img src="http://eurjmin.geoscienceworld.org/content/v…
We reported previously that regenerated Antheraea pernyi silk fibroin (A. pernyi SF) could support the attachment and growth of human bone marrow mesenchymal stem cells (hBMSCs). In this work, the immunosupressive effects of hBMSCs cultured on the A. pernyi SF films on T-cells were investigated in vitro. The productio…
We theoretically investigate the absorption spectra, dipole polarizabilities, and first-order hyperpolarizabilities of SiC(n) and Si(n)C (n=2-6) clusters using the density functional response approach. Similar to other semiconductor clusters such as Si and gallium arsenide (GaAs) clusters, the absorption spectra of th…
Equimolar binary mixtures of the title compounds were prepared to investigate the effect of different polar substituents, either on the pyridine-based derivatives or on the acid component, on the extent and stability of the supramolecular liquid crystal phases induced by intermolecular hydrogen bonding. None of the py…
Tetravalent-ion-doped lanthanum manganite films typically suffer from overoxygenation in the as-prepared state, which in turn leads to an effective hole doping instead of the nominal electron doping. This problem can be overcome by post-deposition annealing in a reducing atmosphere, which, however, suppresses the phas…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTMolecular Weight Dependence of Fragility in PolymersA. Abou Elfadl, A. Herrmann, J. Hintermeyer, N. Petzold, V. N. Novikov†, and E. A. Rössler*View Author Information Experimentalphysik II, Universität Bayreuth, 95440 Bayreuth, Germany, and IA&E, Russian Academy of Sciences, No…
Series of non-symmetric liquid crystal dimers, α-(4-benzylidenechloroaniline-4′-oxy)-ω-[4-(thiophene-2-carboxyl)benzylideneaniline-4′-oxy]alkanes incorporating a thiophene-based moiety in one of the two mesogenic units have been synthesized and characterized. The nematogenic properties of the dimers were studied where…
A homologous series of 2-(4-alkyloxyphenyl)benzothiazoles with an even number of carbons in the terminal alkoxyl chain was synthesized and characterized. The structure of the compounds was postulated using elemental analyses, FT-IR, NMR, and mass spectrometry techniques. Their liquid crystalline properties have been i…
The orbital shapes and charge disproportionations at nominal ${\text{Mn}}^{3+}$ and ${\text{Mn}}^{4+}$ sites for the charge- and orbital-ordered phases have been studied on half-doped manganites $\text{Pr}{({\text{Sr}}_{0.1}{\text{Ca}}_{0.9})}_{2}{\text{Mn}}_{2}{\text{O}}_{7}$ and ${\text{Eu}}_{0.5}{\text{Ca}}_{1.5}{\…
Nanomaterials continue to attract widespread attention in many scientific and technological fields. The sizes and shapes of nanomaterials determine their physical and chemical properties. We have developed an analytical system for single nanomaterials that combines capillary electrophoresis (CE) with a highly sensitiv…
Multiple spontaneous 4f(13)5d(1) --> 4f(14) emissions are predicted in Yb(2+)-doped CsCaBr(3) crystals by ab initio quantum chemical calculations. Four emission bands are found at 23,900, 26,600, 34,600, and 43,900 cm(-1) that should be experimentally observable at low temperatures. The first, third, and fourth bands…
A comprehensive finite element investigation is carried out of the effect of up-armouring on the off-road performance of a prototypical high-mobility multi-purpose wheeled vehicle. The effect of up-armouring on the vehicle performance was investigated under the following off-road manoeuvres: straight-line flat-land br…
The release profile of a drug delivery system is a key factor in determining its efficacy. In the case of a polymeric particle based system, the release profile is a function of several parameters including particle diameter and porosity. The effects of these parameters are usually investigated experimentally using UV…
The new mineral chegemite Ca7(SiO4)3(OH)2 ( Pbnm , Z = 4)1, a = 5.0696(1), b = 11.3955(1), c = 23.5571(3) A; V = 1360.91(4) A3 – the calcium and hydroxyl analogue of humite – was discovered as a rock-forming mineral in high-temperature skarns in calcareous xenoliths in ignimbrites of the Upper Chegem volcanic structur…
The metal to insulator transition in the charge-transfer ${\text{NiS}}_{2\ensuremath{-}x}{\text{Se}}_{x}$ compound has been investigated through infrared reflectivity. Measurements performed by applying pressure to pure ${\text{NiS}}_{2}$ (lattice contraction) and by Se alloying (lattice expansion) reveal that in both…