Materials Literature
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Abstract Palygorskite and sepiolite are fibrous clays that occur mostly in agricultural soils of arid regions. Although many investigations have examined the environmental conditions for the formation and stability of these clays, information on the transformation of these clays in the root zone (or rhizosphere) of ag…
To tune the coercivity of Fe-filled carbon-nanotube (CNT) arrays, the shape anisotropy of encapsulated Fe nanoparticles (Fe-NPs) was investigated. Four Fe-filled CNT-array samples with different Fe-NP aspect ratios were prepared by catalytic pyrolysis of acetylene using ferrocene as catalyst. The coercivity of the Fe-…
The Na (+) and [Cu(en) 2(H 2O) 2] (2+) (en = ethylenediamine) salt of a pseudosandwich-type heteropolyniobate forms upon prolonged heating of Cu(NO 3) 2 and hydrated Na 14[(SiOH) 2Si 2Nb 16O 54] in a mixed water-en solution. The structure [ a = 14.992(2) A, b = 25.426(4) A, c = 30.046(4) A, orthorhombic, Pnn2, R1 = 6.…
Bi 4 − x Eu x Ti 3 O 12 (BEuT) ferroelectric thin films were prepared on SrTiO3 (STO) substrates with different orientations by using chemical solution deposition. The effects of Eu ion concentration and crystallographic orientation on the photoluminescent property of the thin films were investigated. An unusual conce…
Solid solutions of Bi1 − x A x (Fe1 − x/2Nb x/2)O3, where A = Ca, Ba, and Pb, are obtained and their crystal structure and magnetic properties are investigated. It is shown that for A = Ca and x ≈ 0.15, the symmetry of the unit cell changes from rhombohedral (space group R3c) to orthorhombic (Pbnm). The transformation…
Abstract The kinetics of polyhydroxyalkanoate (PHA) degradation in natural environment in two water reservoirs having various ecological characteristics was studied. It was shown that biodegradation of polymer essentially depends on the environment temperature and inorganic composition of water. The processes of polym…
Simultaneously high permeability and permittivity results in a pronounced dimensional effect in Mn-Zn ferrite cores, which makes the measured complex permeability differ for cores with different dimensions. This paper provides a succinct method to solve an inverse problem of tracing dimension-independent or intrinsic…
Among the different ways of synthesizing fiber and tubular micro and nanostructures, some top-down methods resort to electro-hydrodynamic forces to smoothly stretch liquids interfaces down to such small size scales. The well-known electrospinning technique, commonly used to fabricate micro and nanofibers of a broad va…
We obtain the energy transport velocity distribution for a three dimensional ideal cloak explicitly. Near the operation frequency, the energy transport velocity has a rather peculiar distribution. The transport velocity along the direction pointing at the center of the cloak is found to be a constant, while the transp…
Absorption spectroscopy was utilized to investigate the conjugation of amyloid β protein solution (Aβ(1-40)) and chicken egg albumin (ovalbumin) with various sizes of gold colloidal nanoparticles for various pHs, ranging from pH 2 to pH 10. The pH value that indicates the colour change, pH(o), exhibited colloidal size…
The mineral cheralite [CaTh(PO 4 ) 2 ] allows for the incorporation of tetravalent actinides in monazitebased crystalline phases. Experimental determination of its thermodynamic properties is crucial for defining its stability and subsequent long-term ability to immobilize radionuclides. Low-temperature heat capacity…
We have developed a new variable-charge model aimed at performing large-scale realistic simulations of oxide surfaces and interfaces. This model is based on the charge equilibration (QEq) method and explicitly takes into account the mixed iono-covalent character of the metal-oxygen bond by means of a tight-binding ana…
We describe the development of hollow-type gold nanoparticles (NPs) for the photonic-based imaging and therapy of macrophage cells. The strong light-absorption and light-scattering properties of gold NPs render them to be useful as molecular imaging agents as well as therapeutic moieties. By controlling the geometry o…
A liposome is a spherical vesicle composed of phospholipids and cholesterol bilayer membrane and contains a core of aqueous solution. Liposomes are polymeric nanoparticles used for drug delivery due to their unique properties. It can carry both hydrophobic and hydrophilic molecules. In this study, we showed the benefi…
The present study was aimed at developing and exploring the use of long circulating biocompatible PEGylated PPI 5.0G dendrimers for delivery of an anti-inflammatory drug, Aceclofenac. The PPI 5.0G dendrimers were synthesized and PEGylated using Nhydroxysuccinimide- activated dicarboxylic acid PEG 2000 (COOH-PEG-COOH).…
We investigated the magnetic structure and short-range spin correlations of multiferroic hexagonal manganite ${\text{YMnO}}_{3}$ by powder neutron diffraction at high pressures up to 6.7 GPa. High pressure induces a spin-liquid phase in multiferroic ${\text{YMnO}}_{3}$, coexisting with the suppressed long-range antife…
The characterisation of natural aquatic nanoparticles (especially in relation to flocculation processes, contaminant transport and biogeochemistry) has become an important field of environmental science. Ubiquitous colloid-size microbes and their nanoscale extracellular components affect the chemistry and physical pro…
Nephrogenic system fibrosis is a rare disease affecting patients with severe renal insufficiency or dialysis. Its aetiology is incompletely understood. Evidence is growing that gadolinium contrast media is a major risk factor, whereby risk increases with larger cumulative doses. The role of other risk factors, such as…
Epoxy resin is widely used as an insulation material in many electrical apparatuses because of its excellent electrical and manufacture characteristics. It is usually mixed with filler to improve mechanical and thermal characteristics. In order to qualitatively clarify the effect of fillers on treeing phenomena, treei…
Abstract For any biomaterial placed into a biological medium, the surface properties of the material, such as porosity, crystallinity, presence and distribution of electrical charge and functional groups are very critical parameters that determine the acceptance or rejection of the material. Applications, especially t…