Materials Literature
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Development of systems of medicines with sustained action on the basis of biodegradable polymers is a promising trend in modem pharmacology. Polyhydroxyalkanoates (POA) attract increasing attention due to their biodegradability and high biocompatibility, which make them suitable for development of novel drug dosage fo…
A polarization-insensitive and double-face-absorbing metamaterial absorber is presented, which is based on chiral structure. The unit cell of this absorber is comprised of a chiral structure and a dielectric substrate. Simulated absorbances under frontal and reverse incident directions indicate that the structure of t…
Single crystals of Sr1.5Ba0.5Zn2Fe12O22were grown from the flux systems of BaCO3, SrCO3, and Na2CO3by a high temperature, slow cooling, flux method. X-ray diffraction confirmed that the crystal structure is an extended single crystalline array of Zn-Y composition with an in-plane easy axis crystallographic orientation…
Electrically conductive anion-exchange polyaniline resin with diameters of 50–60 nm were prepared using zirconium vanadate as an oxidant and dopant. The polymer samples were characterized by conductivity measurements, spectral studies (FT-IR and UV-Vis absorption spectra), structural studies (X-ray diffraction), morph…
In this paper we reported the preparation technique and thermoluminescence (TL) properties of rare earth (RE) doped lithium calcium borate (LCB) and lithium magnesium borate (LMB) phosphors. The phosphors were prepared by solid sta te diffusion reaction method. The TL glow curves were recorded for all the RE doped pho…
The sizes of zinc-oxide (ZnO) nanoparticles were synthesized by microwave method and were tailored by electron irradiation method. The ZnO nanoparticles having size of ~46 nm synthesised by microwave method were exposed to different fluences of 6 MeV electrons over the range from 1x10 15 to 2.5x10 15 e - /cm 2 . The e…
This paper presents the result of study on Potential and electrical field distribution of XLPE insulation cables containing cavities. From the obtained results we can say that the simulation of electrical behavior of region with a strong cavities concentration is done with success by tow cavity model. The obtained res…
Nanotechnology is a rapidly evolving field with tremendous opportunities for applying technology in highly targeted ways. But for nanotechnology to be truly translated into meaningful benefits for patients, basic research in the laboratory must be supported by evidencebased medicine and predictable regulatory pathways…
The purpose of writing this review on colloidosome drug delivery was to compile the focus on the types, properties, fabrication techniques, characterisation and stability of colloidosomes .The recent developments a number of lipid based systems like lipospheres, liposomes, niosomes, ethosomes, transferosomes were deve…
This paper describes the manufacture of porous polytetrafluoroethylene (PTFE) and fluoroethylenepropylene (FEP) films by pressing PTFE-FEP-PTFE films between metallic meshes to produce a porous ferroelectret material. The influence of uniaxial pressing force and processing conditions (temperature and presence of a vac…
Abstract This paper presents preliminary data from an ongoing study on the radar cross section (RCS) of targets with simple and complex surface geometries (a flat square plate, a 90° dihedral corner reflector and a retired air-to-air missile). Measurements and computer simulations of these metallic targets were carrie…
We have investigated the effect of a disordered porous matrix on the cluster microphase formation of a two dimensional system where fluid particles interact via competing interactions. To this end we have performed extensive Monte Carlo simulations and have systematically varied the densities of the fluid and of the m…
In this work we have used molecular dynamics simulations to explore the binding between two different protein–dendron conjugates and double stranded DNA. Different protein cores protect the binding site from the external environment, but can also influence the multivalent recognition between the spermine ligands of th…
A basic concept in chain-particle cluster-motion, from frozen glassy state to melt state, is the 2D soft nano-scale mosaic structure formed by 8 orders of 2D interface excitation (IE) loop-flows, from small to large in inverse cascade and rearrangement structure in cascade along local one direction. IE has additional…
Acoustic phonons are studied in finite nanowires based on the elastic continuum model. The phonon dispersion relations are compared for different types of approximations both for pure nanowires and nanowire heterostructures including cubic and wurtzite materials. We find that the isotropic approximation highly underes…
The ZnO-LiYbO 2 hybrid phosphors with various Yb 2 O 3 and Li 2 CO 3 starting concentrations were prepared by using the solid-state reaction method in a weak reducing atmosphere. Under the excitation of ZnO absorption with near-UV photons, the intense near infrared emission originated from Yb 3+ : 2 F 5/2 → 2 F 7/2 tr…
Thickness dependence of the magnetic behavior in BiFeO 3 films was investigated. BiFeO 3 films endure a phase transition from a distorted rhombohedral-type to a monoclinic-type, and its saturation magnetization increases with a decrease in film thicknesses. These results confirm that the improved saturation magnetizat…
In order to take the advantage of the specific property of sericin to improve wear property of cotton fabric, cotton fabric was finished with sericin. Sericin was fixed onto the surface of cotton fabric in the presence of poly-carboxylic acids (CA and BTCA) at high temperature using a pad-dry-cure process. The effects…
There were taken attempts to modify the properties of water glass with suspensions of zinc oxide (ZnO) nanoparticles and boeh mite AlOH(O) nanoparticles dissolved in various solvents. It has been shown that the wetting properties of quartz (SiO 2) can be effected by: • the amount of modifier, • the type of solvent, •…
First-principles calculations of the geometry and electronic structure of the impurity center in SrTi1 − x Mn x O3 have been performed. Neutral and negatively charged defects are considered. It is found that the doubly charged impurity center is polar; it has C 4v symmetry and electronic state 4 B 1 with electron pola…