Materials Literature
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The paper deals with the theoretical and experimental aspects of the study of the behavior of materials at the stage of supercritical deformation or work softening, consideration of which is important for the assessment of the durability of structures. The study results show the theoretical confirmation of the effect…
Water-soluble and high photoluminescence (PL) efficiency ZnSe@ZnS core/shell quantum dots were synthesized by a facile aqueous phase route in the presence of additional glutathione ligand as a stabilizer and thiourea as a sulfur source. The structure and optical properties of the obtained ZnSe@ZnS nanocrystals were ch…
Abstract High Impact Polystyrene (HIPS) was synthesized by free radical polymerization through the bulk‐bulk technique. Polybutadiene (PB) and/or poly(butadiene‐ b ‐styrene) copolymer (S:B = 30:70) (at 8 wt‐%) were used as impact modifiers in the presence of 0, 5 and 7.5 wt‐% of polystyrene (PS) and styrene monomer. T…
Abstract The loosely and firmly adsorbed amount of bovine serum albumin (BSA) on dental titanium and dental gold was investigated by bicinchoninic acid assay (BCA assay). This method does not require special properties of the sample like a high reflectivity or conductivity and turns the BCA assay into a valuable tool…
Applications of nanoparticles as drug delivery systems for anticancer therapeutics have great potential to revolutionize the future of cancer therapy. In the present study, Fe3O4 nanoparticles were synthesized by co-precipitation method in the alkaline pH medium. The synthesized nanoparticles were characterized by X-r…
Highly ordered mesoporous variety of silica SBA–15 (Santa Barbara Acid – 15) has been prepared from sugarcane leaf ash by template assisted method and it has been successfully used as an adsorbent for nickel. Post-synthesis modification of the particle is done by grafting of carboxyl, amino, thiol and phenyl groups th…
The effect of the flow of atomic oxygen (AO) on highly filled composites of a high-impact polystyrene (HIPS) and a superfine silicon-organic filler is investigated. Erosion coefficients after the treatment with AO are calculated, and the postirradiation relief of the composites is studied by the method of scanning ele…
AIM: Infections associated with medical devices are an important cause of morbidity and mortality. Microorganisms are responsible for catheter infections that may then result in the local or systemic dissemination of the microorganism into the bloodstream. The aim of this study was to evaluate the antimicrobial activi…
A new method for growing a low-defect elastic-stress-free silicon carbide film on silicon substrates is theoretically developed and experimentally implemented. In this method, the relaxation of inevitable elastic stresses is attained by an essentially new mechanism, namely, by dilatation dipoles (stable complexes cons…
The inhibition effect of cerium sulphate tetrahydrate on the corrosion of steel in 3.5 % NaCl solutions at 25 ±1 °C was investigated by using electrochemical frequency modulation EFM, electrochemical impedance spectroscopy EIS, potentiodynamic polarization and atomic force microscopy (AFM). The electrochemical measure…
The aim of this work was to compare the tilapia (Oreochromis niloticus), pacu (Piaractus mesopotamicus) and tambaqui (Colossoma macroporum) skins on the histology, composition, physico-chemical and physico-mechanical features. Therefore, 10 kg of skins of each species were used. All skins have followed the same method…
In this study, nitrogen-doped porous carbons were prepared by high-temperature carbonization of resorcinol–formaldehyde cryogels, which were synthesized with nitrogen precursor (either urea or melamine) added during the synthesis. The pore structure of the resulting carbon was found to depend on the nitrogen precursor…
The paper addresses the serious issue on insulators owing to partial discharge and flashover resulted from severe NaCl salt contaminant accumulation on transmission lines insulators located near the coastal areas. Disc type insulators such as porcelain and glass were tested at various NaCl salt pollution level in an a…
Diffusion coefficients of sodium and potassium ions in molten glasses with the composition (25 − x )Na 2 O · x K 2 O · 75SiO 2 have been determined by the sectioning method with measurement of the residual activity 22 Na and 42 K isotopes. Diffusion of sodium and 133 Ba ions has been studied in melts of the (30 − x )N…
The current investigation proposes a novel method for simultaneous assessment of the electrochemical and structural fatigue properties of nickel-titanium shape memory alloy (NiTi SMA) wires. The design and layout of an in situ electrochemical cell in a custom-made bending rotation fatigue (BRF) test rig is presented.…
Commercial ultrafiltration membranes were modified using different polymeric nanofibers in order to gain additional water treatment functionality. Membrane surfaces were given biocidal properties by adding electrospun nanofiber structures containing various forms of silver. Changes in viscosity and homogeneity of the…
The requirements for metrology of magnetostriction in complex multilayers and on whole wafers present challenges. An elegant technique based on radius of curvature deformation of whole wafers in a commercial metrology tool is described. The method is based on the Villari effect through application of strain to a film…
Under insonation contrast agents are known to perform nonlinear pulsations and deform statically, in the form of buckling, or dynamically via parametric mode excitation, and often exhibit jetting and break-up like bubbles without coating. Boundary element simulations are performed in the context of axisymmetry in orde…
Carbon nanotube (CNT) based polymeric composites exhibit high strength and thermal conductivity and can be electrically conductive at a low percolation threshold. CNT nanocomposites with polystyrene (PS) thermoplastic matrix were injection-molded and high shear stress in the flow direction enabled partial alignment of…
Polyvinylcarbazole (PVK) composites containing graphene in an amount of somewhat less than 0.15 wt % exhibit third-order dielectric susceptibility due to the presence of graphene, as well as photoelectric and photorefractive sensitivity at 1064 nm. The photorefractive (PR) effect is known to occur in a polymer composi…