Materials Literature
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In this paper, the effect of weaving machine settings on weavability limits of air-jet looms was investigated by weaving plain weave fabrics with polyester warp and weft yarns. For this purpose, firstly, weavability limits were determined for 16.7 tex weft by setting back-rest height, total warp tension, frontshed ang…
The induced modifications of the optical properties in UV-irradiated Makrofol-E with different wavelengths were investigated. Makrofol-E samples were irradiated by UV of wavelengths 254, 302, and 365 nm for different durations. It was found that Makrofol-E shows substantial modifications in its optical characteristics…
This review presents the synthetic aspects and photophysical properties of trimeric systems constructed with a first unit consisting of a cofacial porphyrin and then of another porphyrin attached as a side arm. Two scenarios are dealt with. The first one is the case where the three chromophores are different, called d…
Abstract CaS formed during the retorting process of oil shale has a hazardous influence on surface water quality. Interaction of retorted oil shale with water generates highly alkaline leachate with a high content of sulfur due to the CaS component. A theoretical model describing the behavior of solid calcium sulfide…
A next generation ion source suitable for both high resolution focused ion beam milling and imaging applications is currently being developed. The new ion source relies on a method of which positively charged ions are extracted from a miniaturized gas chamber where neutral gas atoms become ionized by direct electron i…
Previously unreported octaisopropyltetraphenylporphyrin (OiPTPP) was prepared from 3,4-diisopropylpyrrole, an unstable previously unisolated heterocyclic compound. Purification of the free-base 18π porphyrin required conversion to its 18π zinc(II) complex, chromatographic separation, and acid mediated demetalation. Ox…
The stacking structure of tubular halloysite, which is easily damaged by electron-beam radiation, has been investigated by high-resolution transmission electron microscopy (HRTEM) using a new TEM with a computer-assisted minimal-dose system. The new TEM is equipped with a high-speed beam blanker by which the specimen…
In the present paper, we study the effects of functionalization of graphene with simple organic molecules OH, and NH 2 , focusing on the stability and band gaps of the structures. We have performed DFT calculations for graphene supercells with various numbers of the attached molecules. We have determined adsorption en…
Poly(3,4-ethylenedioxythiophene), PEDOT, electro-obtention has been widely studied because of its variety of applications. One of its most relevant electrochemical characteristics is its ability of p- and n-doping (an almost unexplored property thus far), consequently in the present survey its potential use for mercur…
A challenge for the pharmaceutical formulation development is the increasing number of drugs being poorly soluble. Drug nanocrystals can be produced by the so-called“bottom up” or by “top down” technologies. Regarding intravenous administration of drug nanocrystals; the small size of the nanocrystals, typically betwee…
Eu, Dy codoped Y2Zr2O7 crystalline powders have been prepared by a simple sol-gel-combustion method. The lumincescence excitation and emission spectra of the products were measured, and the CIE chromaticity was introduced to characterize the color of the phosphor. It was found that the emission color of the Eu, Dy cod…
The crevice corrosion behavior of 316L stainless steel (316L SS) which used on marine gas turbine inlet filters was investigated in 3.5% NaCl solution by means of potentiodynamic polarization and potentiostatic technology, and the experimental data were analyzed on the basis of stochastic theory. The presence of crevi…
We report a study of the electronic properties of the ferromagnetic semiconductor (Ga,Mn)As using magnetic linear dichroism in the angular dependence of Mn 2p photoemission under hard x-ray excitation. Bulk plasmon loss satellites demonstrate that the probed Mn ions are incorporated deep within the GaAs lattice, while…
New imidazolium salts bearing substituted 5-phenylpyrimidine mesogenic groups were synthesised and their mesomorphic properties were studied by differential scanning calorimetry, optical microscopy and powder X-ray diffraction methods (WAXS, SAXS). The parent 5-phenylpyrimidines with the terminal bromide group at the…
We studied the dielectric properties of nano-sized liquid water samples confined in polymerized silicates MCM-41 characterized by pore sizes 3–10 nm. Freezing temperature suppression in nanopores helps keep the water samples in liquid form at temperatures well below 0°C and thus effectively study the properties of sup…
The effect of ultraviolet radiation of polycrystalline zinc oxide films (with a thickness of 200 nm) on their resistivity, transparency, and luminescence in the visible and violet spectral regions is studied. It is shown that, under irradiation of the films in air and vacuum, the conductivity, transmittance, and edge…
We review the use of dissipative particle dynamics (DPD) simulations to explore the columnar phases of tri- and tetra-block liquid crystalline bolaamphiphiles. We show how computer models can reproduce the phase behaviour of real molecules, exhibiting columnar phases of different symmetries depending on the lateral ch…
The influences of La and Ru codopants on the microstructure, nanoscale ferroelectric domain structure, and macroscopic ferroelectric and ferromagnetic properties of polycrystalline BiFeO 3 (BFO) films have been studied systematically. Microstructure studies indicate that the films have a pure and polycrystalline phase…
A series of calcium aluminum layered double hydroxides (LDHs) modified with sodium dodecyl sulfate (SDS) (Ca /Al-SDSLDHs) were synthesized by co-precipitation, and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and elemental analysis. The Ca /Al-SDS-LDHs enhanced sorption of nitrobenzene…
The 4-[4′-(5-sulfonaphthylazo)phenoxy]phthalonitrile potassium salt was synthesized by the reaction of 4-chlorophthalonitrile with 5-(4′-hydroxyphenylazo)-1-naphthalenesulfonic acid, and on its basis was obtained tetra-4-[4′-(5-sulfonaphthylazo)phenoxy]phthalocyanine. The products were characterized by elemental analy…