Materials Literature
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This paper provides an extension to Cosserat mechanics of a recently proposed version of hypoplasticity [1], and this extension is achieved economically by means of a novel complex‐variable formulation of Cosserat theory.The present work represents a compact synthesis and theoretical framework for both non‐polar and p…
While ruthenium tris(diimine) complexes have been extensively studied, this is not the case with ruthenium bis(diimine)X(2) complexes where X represents a pyridinyl-based ligand. The synthesis of a new complex ([2][PF(6)](2)) bearing two ambident Schiff base ligands (HL) constituted by the assembly of phenol and pyrid…
A method was developed for applying a diamond-like carbon (DLC) coating on aluminum alloys to obtain sufficient adhesion strength and wear resistance. The key points of this technology consist of two main processes. First, the surface of the aluminum substrate is modified by forming a top layer of dispersed fine tungs…
O objetivo principal do presente trabalho foi simular através de modelos de elementos finitos o ciclo do ensaio de indentação com penetradores esféricos em um sistema composto de recobrimento superficial fino depositado em um substrato metálico. Recentes trabalhos propõem a utilização dos ensaios de indentação (nanoin…
Controlled switching, taking into account the residual flux level within a transformer core, can effectively eliminate inrush currents. Many switching sequences assume the residual flux as a constant value, which can be obtained by a measurement after a transformer de-energization. However, in case of a transformer sy…
In the templated grain growth (TGG) method for the grain-oriented ceramics, a method using single crystal particles with cubic shape as templates were investigated. The rolling-extended method was used to align the cubic templates to a direction in matrix. A cubic ceramic of 2 mm on a side was used as a pseudo cubic t…
Ethyl acetate (EA) shows low viscosity for its relative permittivity. Monofluorinated solvents exert the polar effect on the physical and electrochemical properties. Relative permittivity of 2-fluoroethyl acetate (2FEA) was lower than that of ethyl fluoroacetate (EFA), though viscosity of 2FEA was higher. Ionic conduc…
We describe the anesthetic management of a patient with hypertrophic obstructive cardiomyopathy with dual-chamber pacemaker undergoing transurethral resection of the prostate. Anesthetic challenges included prevention and management of perioperative arrhythmias, maintenance of adequate preload, afterload and heart rat…
Fuel assemblies are very expensive parts of the nuclear reactor. Initially they were used in Hungary for 3 years, now for 4 years and soon they will stay in the core for 5 years. Each year only 1/3rd, 1/4th later 1/5th of them is replaced, therefore the change of the fuel type is a lengthy process, with mixed cores us…
In this paper, we present a simulation of chemical vapor deposition with metallic bipolar plates. In chemical vapor deposition, a delicate optimization between temperature, pressure and plasma power is important to obtain homogeneous deposition. The aim is to reduce the number of real‐life experiments in a given CVD p…
The creep behavior of hypoeutectic Mg-xCa (x=2.8, 8.7, and 14.8 mass%) cast alloys was investigated at 473 K under stresses between 30 and 60 MPa. The microstructure of the alloys is characterized by the discontinuously distributed primary α-Mg phase in a continuous eutectic fine lamellar structure consisting of α-Mg…
Sedimentation properties of the TiO2 nanoparticles with very high specific surface area (about 180 m2/g) based on the BET method have been investigated in various organic solvents. The TiO2 nanocolloid in the isopropyl alcohol displayed a considerably high electrostatic repulsive force, compared to that in other solve…
Nanocomposites of poly[(2-methoxy,5-octoxy)1,4-phenylenevinylene]-zinc selenide (MOPPV-ZnSe) are synthesized by mixing the polymerization of 1,4-bis (chloromethyl)-2-methoxy-5-octoxy-benzene in the presence of ZnSe quantum dots. The resulting MOPPV-ZnSe nanocomposites possess a well-defined interfacial contact, thus s…
In this study conformational behavior of anticancer chemotherapy dipeptide Ala-Gln and its dimers have been investigated by molecular mechanic and ab-initio calculations. The calculations on Ala-Gln dipeptide as a function of side chain torsion angles, enable us to determine their energetically preferred conformations…
Polytetrafluoroethylene (PTFE) sheet surface was treated by the diborane/H2/He plasma for the deflurination to improve the painting performance. Diborane was generated by the H/He plasma treatment of a boron plate. And then, the defluorination plasma treatment with this diborane/H2/He mixture gas performed to PTFE she…
The interactions of two types of cells (red blood cells, Caco-2 cells) with magnetic iron oxide nanoparticles (non-grafted, citrate-grafted, dendrimer-grafted) of 11 nm in size have been investigated. We focused on two important physiological parameters of the cells, the intracellular pH and the intracellular Ca2+ con…
The thermoelastic effect describes a linear relationship between change in body temperature and state of stress in the presence of adiabatic conditions. This approach considers the material properties constant with temperature, which is not correct for all materials. Experimental results and a review of the theory, es…
Giant negative temperature coefficient of resistance (TCR) was observed in ZnO/Si (111) thin films. The films were grown using the pulsed laser deposition (PLD) technique, taking Si (111) wafer as substrates, with a substrate at the temperature below 450°C in the PLD. It is found that both TCP-temperature behavior and…
Several new poly(imide siloxane)s co-polymers have been prepared by the reaction of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) with commercially available 4,4′-oxydianiline (ODA) and with five different novel trifluoromethyl-substituted diamines, each with 20 wt% aminopropyl-terminated polydimethylsilo…
Zinc can be inserted into the carbahemiporphyrazines by use of the organometallic reagent diethylzinc; in the case of benziphthalocyanine, concomitant alkylation of an alpha-carbon position and metalation occurs.