Materials Literature
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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…
Luminescence enhancement and quenching of Eu(TTA)(3) x 2 H(2)O complex in DMF (N,N-dimethylformamide) solution containing silver nanoparticles were observed, which depended on the concentrations of both europium complex and silver nanoparticles. Their origins were discussed based on absorption spectra, excitation and…
2-Thenoyltrifluoroacetone (TTA) used as the organic ligand and the poly(ethylene glycol) (PEG400 with the molecular weight of 380-430) used as the network precursor were grafted onto the coupling agent 3-(triethoxysilyl)-propyl isocyanate (TEPIC), respectively, to construct two precursors TTA-Si and PEG-Si. Then the p…
The aim of this study was to characterize the behaviour of cisplatin adsorbed magnetic nanoparticles (cis-MNPs) for minimal invasive cancer treatments in preliminary in vitro investigations. Cisplatin was adsorbed to magnetic nanoparticles (MNPs) by simple incubation. For stability determinations, cis-MNPs were incuba…
Rates of oxygen-isotope exchange at all structural sites in two isostructural polyoxometalates, [H(x)Nb(10)O(28)]((6-x)-) and [H(x)Ti(2)Nb(8)O(28)]((8-x)-), show that small changes in structure have surprising and profound effects: a single-site substitution of Ti(IV) for Nb(V) inverts the pH dependencies for rates th…
We systematically investigate the morphological evolution of monolayered micelle films of poly(styrene- block -4vinylpyridine) (PS- b -P4VP) copolymers with different molecular weight and compositions upon tetrahydrofuran (THF) solvent annealing. Despite the final ordered arrays of the spherical micelles achieved with…
BACKGROUND: Gadopentate dimeglumine (Gd-DTPA) enhanced magnetic resonance imaging (MRI) is widely applied for the visualization of blood brain barrier (BBB) breakdown in multiple sclerosis and its animal model, experimental autoimmune encephalomyelitis (EAE). Recently, the potential of magnetic nanoparticles to detect…
The electrical conductivity of graphene oxide (GO) and reduced graphene oxide (RGO) films with poly(allylamine hydrochloride) (PAH) supporting layers is investigated. Graphene-PAH hybrid films were produced in a two-step procedure that consisted of vacuum filtration for GO (or RGO) dispersion to fabricate the graphene…
Biopolymer films were developed from apple peels of apple process co-products and their physical properties were determined. Apple peel-based films with glycerol (23%, 33%, and 44%[w/w, dry basis]) were prepared using high-pressure homogenization (HPH) at different levels of pressure (138, 172, and 207 MPa). An evalua…
In this paper we introduce a three-dimensional version of the Mercedes-Benz model to describe water molecules. In this model van der Waals interactions and hydrogen bonds are given explicitly through a Lennard-Jones potential and a Gaussian orientation-dependent terms, respectively. At low temperature the model freeze…
Conventional and temperature-modulated differential scanning calorimetry (DSC) experiments have been carried out on miscible blends of polyisoprene (PI) and poly(4- tert -butylstyrene) (P4tBS) over a broad composition range. This system is characterized by an extraordinarily large T g difference (∼215 K) between the t…
Spontaneous elongation from nanorod to nanowire in the presence of an amine is reported for nanocrystals of cadmium sulfide and silver sulfide (cation exchanged from CdS). Elongation occurs instantaneously where the final aspect ratio is a controllable multiple of the original nanorod length. Transmission electron mic…