Materials Literature
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Boron-doped diamond film on a quartz crystal electrode was prepared by a reflow technique. The mass sensitivity of this diamond-quartz crystal microbalance (QCM) sensor was determined by performing electrodeposition. This novel electrochemical QCM sensor was quite stable under several electrochemical experimental cond…
ABSTRACT The viscoelastic behavior of bread crumb was studied using dynamic mechanical analysis (DMA) in the compression mode with the frequency sweep. The dynamic storage modulus (E′), loss modulus (E″), and tanδ (E″/E′) were measured for bread crumb aged up to three days at ambient temperature. The viscoelastic prop…
High efficiency Hybrid Systems (HS) based on the coupling of Solid Oxide Fuel Cells (SOFCs) and Gas Turbines (GT) are analysed in this paper through the use of two different approaches: simplified and detailed SOFC models. The simplified model, already presented by the Authors1, is very useful for HS design and off-de…
Abstract In the spring of 1997, seven companies and industry associations from the USA and Canada decided to sponsor the cone calorimeter interlaboratory test programme. Reproducibility and repeatability were determined for the scalar variables measured in the cone calorimeter (ASTM E1354) according to the protocol de…
The number of publications and scientific meetings in the field of ferroelectricity has been increasing exponentially in the last 30 years. In addition to the classical fields of phase transitions and critical phenomena four new sub fields have emerged: a) ferroelectric liquid crystals, b) thin films and integrated fe…
The substitution reactions of the coordinated acetonitrile molecule in [Ni(L)(MeCN)][BF4]2 (1) {L = 2,5,8-trithia[9],(2,9)-1,10-phenanthrolinophane} with three potentially bidentate ligands L′ (L′ = N3−, 4,4′-bipyridine and F−) have been studied both in solution and in the solid state with the aim of verifying the pot…
The electronic structure of different phosphorus carbide solid phases with stoichiometry P4C3 is studied using first-principles density-functional calculations; the lowest energy phase is cubic defect zinc-blende with graphitic phases much higher in energy.
Dimerization of free acid and ester forms of disulfonated deuteroporphyrin is investigated in aqueous solution by absorbance and fluorescence spectroscopies. The dimerization equilibrium constant increases with the extent of esterification. In phosphate buffer saline (pH 7.4, 20 degrees C), it ranges from 1.4 x 10(6)…
The feasibility of intelligent utilization of iron-aluminum scraps is explored in this work. Through adding aluminum which is contained in the scraps to cast iron, the changes in wear resistance, heat resistance and damping property of aluminum-alloyed cast irons were systematically investigated. Superior properties w…
En-coordinated lithium salts of binary or ternary hexachalcogenodistannates(IV), Li4Sn2E6 · 8en (E = S (1), Se (2), Te (3)), Li4Sn2S1.36Se4.64 · 8en (4), Li4Sn2Se2Te4 · 8en (5 a), Li4Sn2Se2Te4 · 9en (5 b), and Li4Sn2S2Te4 · 10en (6) (en = 1,2-diaminoethane) were synthesized by extraction of Li/Sn/E or Li/Sn/E/E′ phase…
Ti and Ti alloys have a series of outstanding properties,such as small densities,high specific strengths and rigidities,excel- lent corrosion-resisting and antifatigue properties,good high-temperature behaviors and wedding performances and so on,and have been extensively applied to military(aerospace,et al)and civil(a…
Constitutive properties of concrete under dynamic loading play an important role in the analysis of concrete structures subject to impact loading.There are many defects such as micro crack and micro void inside the concrete material.Damage softening has a great influence on the mechanic behavior of concrete under impa…
Fibernodes in flax, hemp and stinging nettle fibers were studied using light microscopy(1). The fibers were prepared both mechanically and chemically. The observations showed that flax, hemp and stinging nettle fibers carry numerous unevenly distributed disturbances that we name fibernodes, visible as single or double…
The comparison of degradation of modified poly(e-caprolactone) film in different environments is presented. Poly(e -caprolactone) was incubated in a natural environment - sea water (the Baltic Sea), in buffered salt solution, in liquid medium containing sea water with NaN3 and in compost with plant treatment activated…
The heat and flame resistance of the high performance fibers poly- p-phenylenediamine-terephthalamide (PPTA), co-poly( p-phenylene-3,4-oxidiphenylene-terephthalamide) (TECH) and Poly( p-phenylene-2,6-benzobisoxazole) (PBO) fibers is studied. It is shown that for an organic polymer PBO has exceptional heat and fire res…
In part I, we have shown experimentally that the large amount of work softening is due to decreasing activation enthalpy for plastic deformation with increasing plastic strain. Based on the Peierls mechanism of the dislocation glide, the plastic deformation process in a quasiperiodic lattice is modelled. In the model,…
From the viewpoint of "supramolecular chemistry", control of crystal and electronic structures of molecular conductors is described. We have developed a variety of cation and anion radical salts containing supramolecular assemblies. For the formation of the supramolecular structures, two types of supramolecular syntho…
A terbium m -methylbenzoate complex with 1,10-phenanthroline, [Tb( m -MBA) 3 phen]·H 2 O has been obtained from ethanol solution, where m -MBA= m -methylbenzoate and phen=1,10-phenanthroline, and its structure determined by X-ray diffraction methods. The unit cell contains binuclear molecules of the title compound. Ea…
Freeze-dried collagen scaffolds can be used for a variety of medical tissue engineering applications. The pore structure of the scaffolds might play a decisive role for the inoculation, growth and differentiation of the cells. For a controlled 3D-cell growth the pore structure needs to be homogeneous and the pore size…
The air penetration within a porous clothing system on a moving human is an important physical process that considerably affects the heat and moisture resistance of the textile material. This effect of the coupled convection heat and mass exchange within the clothing system is experimentally investigated and theoretic…