Materials Literature
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In this study, nano-sized platinum particles were deposited on post surface modified carbon paper (SMCP) to improve the performance of the catalyst in fuel cells. \nThe structures and compositions of Pt on untreated carbon paper (Pt/UCP) andsurface modified carbon paper (Pt/SMCP) were investigated by field emissionsca…
The partial sums f3(z) of some extermal functions for various classes S ∗ , K and R of starlike functions, convex functions and functions with positive real part in the open unit disk U, respectively, are discussed. In general, the partial sums can not preserve the same character as the initial functions. The object o…
The reduction process of 6-benzylaminopurine (6-BAP), known as an adenine type of cytokinin, was investigated on mercury electrode by DC polarography [1, 2], cyclic and differential pulse voltammetry [2]. The aim of our contribution was the study of the effect of methanol content (1-20% v/v) and ionic strength (0.1- 1…
The authors demonstrate that the efficiency of protection of wooden structures, covered with paints and lacquer materials, from the influence of the environment, depends on the adhesion size. It is common knowledge that improvement of adhesion of capillary-porous materials to the wood, and, hence, the increase of the…
The mathematical model of an isothermal extract with an thinning of a wall of cylindrical thin walled preparations from anisotropic materials is given in the maple channel in a creep mode. Influence of technological parameters on the strained and deformed conditions and power modes of an isothermal extract with an uto…
The i¬-dependent optical refractive and extinction coefficients n and k of oxides thin layers (Sb2O4, SnO2, ZnO andWO3) have been determined from experimental measurement of reflection R(i¬) and T(i¬) transmission ratios within the Ultraviolet-Visible-Near-Infrared (UV/VIS/NIR) domain (300- 1800nm). This study a…
Ln(III) and Cu(II) complexes are utilized in medicine and preclinical research as magnetic resonance, optical or nuclear probes for diagnostics and/or for cancer treatment. For biomedical applications, such complexes should exhibit a high thermodynamic stability as well as kinetic inertness under physiological conditi…
The purpose of this work was to alleviate the water issue present in Nafion ®based PEM fuel cells operating at low relative humidity conditions by employing a hydrophilic substance COMP-1 in the electrode layer.This modified electrode was hypothesized to prevent the cell from dehydrating by retaining water in the cata…
This work is aimed on the study of relationship between mechanical properties, chemical composition and inner structure of nanocomposite n-TiC/a-C:H coatings. Furthermore the obtained results were used to optimize the preparation process and maesuring metodology.
4-(4-Nitrophenyl)urazole(4) was reacted with two equivalents of hexamethylene diisocyanate (HMDI)(5), isophorone diisocyanate (IPDI)(6) and tolylene-2,4-diisocyanate (TDI)(7), in DMF as a solvent to forming the related diisocyanates. The reaction of 4-(4-aminophenyl)urazole(1) with phthalic anhydride(2) in a mixture o…
Područje biomaterijala je izrazito interdisciplinarno područje unutar znanosti o materijalima. U ovom radu je pozornost posvećena samo jednom segmentu biomaterijala, ponajprije onome koji se bavi inženjerstvom materijala za izradu humanih medicinskih implantata. Trenutno postoji veliki broj dostupnih materijala za izr…
We present the results of DFT calculations of structure and vibration IR spectrum of hexamethylphosphoramide (HMPA). It is shown that the equilibrium configuration of the molecule HMPA has the symmetry C3. The characteristics of the calculated vibrational IR spectrum of HMPA generally adequately reproduce the experime…
Es wird ein neuartiges, hochintegriertes Kamerasystem mit einer räumlichen Auflösung von 1024 x 1024 Bildpunkten zur Messung von Lumineszenzabklingzeiten im Frequenzbereich bei Modulationsfrequenzen von 5 kHz bis 50 MHz vorgestellt. Es kann die bildhafte Messung von Lumineszenzabklingzeiten deutlich vereinfachen und n…
Composite films of (i) Ni80Fe20/CoO, Ni80Fe20/CoO/Co and (ii) [NiFe/Mn(Cr)]50 were prepared by dual ion-beam deposition technique. The structural and magnetic properties of these composite films were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM), and su…
The use of thin shells with the filler in the building industry as one of the most efficient types of building structures are considered in this paper. The fields of application of thin shell structures are specified, including civil, industrial and hydraulic engineering. Theoretical researches of the joint performanc…
In article formation of weld at electron beam welding of steel 12Х18Н10Т with an electron beam oscillation is investigated. Influence of focusing of an electronic beam on geometry melting zone at welding with an beam oscillation is disscussed. The microstructure of metal of a welds is given when welding by an beam osc…
The copolymer P(AM-co-4-VP) (PAV) of acrylamide (AM) and 4-vinylpyridine (4-VP) was synthesized by conventional radical copolymerization, and then the copolymer was quaternized by alkylbromides chains with a number of carbon atoms varying (C2,C4,C8 and C10) to product cationic (CPAV), a cationic polyacrylamide contain…
This article considers the problems, concerning the necessity of formation a common databank of future specialists and graduating students of specialized institutions of higher education, aimed at increasing the efficiency of manpower policy in the sphere of nuclear energy.
Import 11/07/2012
Показана принципиальная возможность создания технологии получения качественных регенерированных смесей из старых асфальтобетонных покрытий на основе электрогидравлического холодного способа их переработки.