Materials Literature
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Abstract An effect of heat flux on initiation and propagation of pitting corrosion of austenitic stainless steel in chloride environment has been studied using electrochemical and exposure methods. The experiments were performed at constant surface temperature of 60°C and heat flux from − 15 to + 74 kW m −2 . The pres…
The effect of the lattice deformation on the electronic spectra of TlGaS 2 , TlGaSe 2 , and TlInS 2 layered semiconductor crystals is analyzed. It is shown that changes in the band gap of these semiconductors due to thermal expansion and a change in the composition under hydrostatic or uniaxial pressure can be describ…
This study investigates thermal mismatch stresses in the lamellar microstructure of the solid solution directionally solidified eutectic (DSE) oxide Co 1− x Ni x O/ZrO 2 (CaO). X‐ray and neutron diffraction measurements were performed on isolated eutectic domains to measure the residual strain and stress tensors. Maxi…
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Abstract Quantification on the nanometre scale is a key task in quality control and for the development of new materials in nanotechnology. In this paper we have studied the consistency in the determination of the amount of substance found by XPS peak shape analysis, Rutherford backscattering spectroscopy (RBS) and x‐…
The computer program FAMS (Full Automatic Modeling System) performs homology modeling of protein structures by means of an algorithm consisting of database searches and simulated annealing. FAMS produces a model in which the torsion angles of the backbone and sidechains are highly accurate. The operations of the FAMS…
Porous hydroxyapatite bioceramics were developed by a new direct consolidati on method based on the foaming capability of egg white and on its gelling pr operties on heating, thus acting both as pore former and consolidator agent. The bubble forming capability of fresh egg white, due to the presence of a globular prot…
The effect of lycra fil ament and full relaxation finisH on the extension at peak load. immediate recovery , delayed recovery, permanent set and resiliency of cotton-Iycra blended knitted fabric has been studied. It is observed that for lycra blended fabric, the immediate recovery, extension and resiliency are higher…
By using additional fuel enrichment, the influence of an electrical heater and the oxidation of unburnt exhaust gases on the reaction of an electrically-heated catalyst under cold-start condition of a four-stroke motorcycle engine was investigated. The effects of different cold-start enriching times, heating temperatu…
The extinction coefficient determined by light scattering on liquation particles in a glass has been calculated, taking into account interparticle interference. The calculations use several types of pairwise particle-correlation functions. It is shown, in particular, that using Debye and Percus-Yevick pairwise correla…
The sol−gel process of 1,8-bis(triethoxysilyl)octane (TES-Oct) catalyzed by phosphotungstic acid (PWA) has been investigated by time-resolved dynamic light scattering. The time−intensity correlation functions (ICF) exhibited two modes, corresponding to the cooperative diffusion of entangled chains and the translationa…
Copper-cadmium ferrite substituted with different rare earth ions R (R=La,Sm, Gd and Dy) are investigated. The temperature dependence of theelectrical resistivity (ρ) and thermoelectric power (α) are measured and hencethe mobility is calculated. The electrical resistivity is increased with increasingthe ionic radius o…
The luminescence decay times τlum of the complexes of the ions Tb(III), Eu(III), Sm(III), Dy(III), and Yb(III) with dipicolinic acid (DPA) dissolved in protonated and deuterated water, methanol, and dimethyl sulfoxide are measured. The values of τlum for crystals H3[Ln(DPA)3]·nH2O and their aqueous solutions coincide,…
Au/TiO 2 nanocomposites were prepared by a hybrid route consisting in the rf sputtering of gold on porous titania xerogels [TiOx(OH)y(OR)z] obtained by means of the sol-gel route. In particular, titania substrates were prepared on silica slides by dip-coating starting from ethanolic solutions of Ti(OPri)4 (OPri=iso-pr…
Water wetting is a crucial issue in carbon dioxide (CO2) corrosion of multiphase flow pipelines made from mild steel. This study demonstrates the use of a novel benchtop apparatus, a horizontal rotating cylinder, to study the effect of water wetting on CO2 corrosion of mild steel in two-phase flow. The setup is simila…
The poly(hydroxy-amide) [PHA] family of polymers possess not only high temperature stability, but also form a more thermally stable polymer (polybenzoxazole) [PBO] during thermal decomposition. The synthesis occurs in solution at low temperature, preventing premature ring cyclization to PBO. The molecular structure wa…
Abstract Two metallocene ethylene‐oct‐1‐ene copolymers, differing in comonomer content and in molecular weight, were cross‐linked either by dicumyl peroxide or β ‐radiation. The effect of high comonomer content on the crystalline morphology, once the materials were cross‐linked, was analyzed by differential scanning c…
SUMMARY Three fragilarioid diatom taxa were studied in detail at the light microscopy and scanning electron microscopy levels from samples collected from Lake Hovsgol, Mongolia. Two of the taxa are new to science, described here as Staurosirella minuta Morales et M. B. Edlund and Pseudostaurosira tenuis Morales et M.…
Fluorvesuvianite was found in the abandoned Lupikko iron mine, Pitkaranta, Karelia, Russia. It occurs in cavities of chloritized diopside skarn, as radiating aggregates of acicular crystals in calcite. Crystals (up to 1.5 cm long and 5-20 mum across) are elongate along [001]; the dominant forms are {100} or {110}. Ass…
Foi realizado um estudo da flora perifítica de diatomáceas (Bacillariophyceae) existente no Rio Jaú, tributário do Rio Negro, Amazônia (2º57'S e 61º49'W). As coletas foram realizadas manualmente nas cheias de 1995, 1996 e 1997, e as lâminas permanentes encontram-se depositadas no Herbário FLOR, Universidade Federal de…