Materials Literature
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Tight requirements posed by the increasingly stringent legislation complicate the design procedure for exhaust aftertreatment devices and systems. Since design optimization relies heavily on experiments and tests, emissions test data acquisition should comply with strict quality standards. Time-varying exhaust emissio…
In Part I of this series, air pressure and air velocity are measured on an air-jet filling insertion simulator with tube and profiled reed. In this second part, the filling yarn insertion time is measured on the air-jet filling insertion simulator with the profiled reed, and yarn velocity is calculated. The effects of…
Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.
Nickel alloy steam generator tubes of pressurized water reactors (PWR) are sensitive to stress corrosion cracking (SCC) and the possibility of predicting SCC from electrochemical measurements is of considerable interest for nuclear industry. The electrochemical properties of several nickel-based alloys were studied at…
The effect of 4th generation poly(amidoamine) dendrimer (4G PAMAM) present in an anionic phospholipid composition, consisting of hydrogenated soyphosphatidylcholine (HSPC), cholesterol (CH), dicetyl phosphate (DCP), and poly(ethylene glycol) (Mw approximately 2000) derivatized phosphatidylethanolamine (PEG2000-PE), on…
Em uma indústria de móveis estofados, localizada em Piracicaba, SP, foram coletados aleatoriamente corpos-de-prova de painéis compensados e OSB para determinação das propriedades de resistência (MOR) e rigidez (MOE) à flexão estática, com as finalidades de compará-las e avaliar a possibilidade de substituição direta d…
This paper presents measured results of the two-dimensional vector magnetic properties in electrical steel sheets under high frequency excitation conditions. The relationship among the maximum flux density, the magnetizing direction, the exciting frequency, the axis ratio of the rotating flux density(the ratio of the…
The molecular dynamics (MD) calculation was performed for minor actinide (MA: Np and Am) dioxides in the temperature range from 300 to 2,500K to evaluate the thermophysical properties viz., the lattice parameter, thermal expansion coefficient, compressibility, heat capacity, and thermal conductivity. The Morse-type po…
Abstract Linear polystyrene‐ block ‐poly(Z‐L‐lysine) copolymers with a very narrow molecular weight distribution (polydispersity index < 1.03) could be obtained via the ring‐opening polymerization of Z‐L‐lysine‐ N ‐carboxyanhydride using ω‐(primary amino hydrochloride)‐polystyrenes as macroinitiators in N,N ‐dimeth…
Coloured glasses produced commercially by Cebracê, São Paulo, were analysed by the thermoluminescent (TL) method, to verify the possibility of their use as high-dose dosemeters or irradiation indicators in industrial areas, due to their easy handling and their low cost. The samples were exposed to different radiation…
Research studies have shown that protective coatings of diverse chemical composition represent a powerful factor stimulating the bacterial activity of corrosion inducers. On the film and mastic coatings investigated in the present paper, bacterial communities are formed, which consist of bacteria of various ecological…
Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.
We report the first experimental high–electric-field phase diagram of a nematic liquid crystal with negative dielectric anisotropy. The variation of the paranematic-nematic transition temperature ( T PN ) is essentially linear with | E |, whereas the Landau-de Gennes theory predicts a quadratic variation. It is argued…
Abstract The interaction between thin films of polyphenylacetylene (PPA) and bovine serum albumin (BSA) dissolved in phosphate buffer solution (PBS) was studied by x‐ray photoelectron spectroscopy (XPS) and Fourier‐transform infrared spectroscopy (FT‐IR) performed in reflectance mode. PPA is a semiconducting π‐conjuga…
The behavior of a Co-Cr-Mo biomaterial used as dental prosthesis was studied by electrochemical (Open Circuit Potential (OCP) and potentiodynamic polarization) and surface analysis techniques (Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS)) in artificial saliva, artificial saliva with modi…
Abstract Storage tanks containing microbially contaminated diesel oil are susceptible to corrosion. This process may be evaluated electrochemically in the laboratory using simulated storage systems containing diesel oil and an aqueous phase. The simulated aqueous phase must supply mineral nutrients for microbial growt…
Cryomilling is one of the few technologies available to fabricate a large quantity of nanostructured materials. No matter how exciting and promising a technology is, its ultimate realization is invariably dependent on economic success. Technical cost modeling was employed in this paper to analyze the processing cost o…
Wurtzite semiconductors GaN, ZnO, CdS, and CdSe are studied in this paper. Optical phonon frequencies of these semiconductors are calculated as a function of angle with respect to the $c$ axis. Electron-phonon interaction Hamiltonians and the total scattering rates are derived. Scattering rates for GaN, ZnO, CdS, and…
Abstract Sixteen OCH 2 CH 2 N 3 P( i ‐BuNCH 2 CH 2 ) 3 N substituents (A) containing the highly basic bicyclic azido‐phosphine moiety shown, have been incorporated into the dendrimer [CH 2 CH 2 N[(CH 2 ) 3 N[(CH 2 ) 3 NHC(O)‐3,5‐bis‐(A)‐C 6 H 3 ] 2 ] 2 ] 2 in five steps from commercially available starting materials w…
The characteristic features of hydroxystearic acid monolayers OH-substituted in the mid position of the alkyl chain deviate considerably from those of the usual nonsubstituted stearic acid. The phase behavior, domain morphology, and two-dimensional lattice structure of 9-, 11-, and 12-hydroxystearic acids are studied,…