Materials Literature
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Calcium carbonate precipitation by 63 strains of moderately halophilic bacteria (Vibrio spp.) isolated from water of a saltern pond has been studied, taking into account the influence of salinity and temperature on the quantity and type of crystals precipitated. The bacteria formed crystals under all the conditions te…
Al-Ag1
The high speed impact method for the surface modification of particles, called the NARA Hybridization System, is one of the most highlighted one among the methods for developing various particles. The key machine which joins many fine powder to the surface of a core particle through a dry and mechanical method can be…
The effects of SiO2 substitution for P2O5 on the structure and properties of phosphate glass with the base composition 60P2O5⋅10PbO⋅20ZnO⋅10Li2O were investigated. Glass was formed when there was less than 25.0% SiO2 substitution for PO5/2. From measurements of Fourier-transform infrared spectroscopy and X-ray fluores…
Polyhydroxybutyrate (PHB) and its copolymers with polyhydroxyvalerate (PHV) are a range of slowly degrading polyesters with potential for use in orthopaedic surgery. The polymer degradation profile is unpredictable and thus a composite of PHB/7 % PHV and a completely soluble phosphate based glass reinforcement was com…
Abstract This paper describes the development of dc XLPE cable. Through a series of material investigations, an XLPE compound containing highly purified special filler was developed. To check the dc insulation performance of the cable insulated with this new material, a prototype cable with 9 mm insulation thickness w…
The electron donating properties of ceria activated at 300, 500 and 800 °C and its mixed oxides with alumina are reported from the studies on adsorption of electron acceptors of various electron affinity. The surface acidity/basicity of the oxides have been determined by titration method and H 0,max values are reporte…
Boundary element method(BEM) is applied to computation of 3D eddy current fields due to heavy current leads in a 360MVA/500kV power transformer. To improve numerical accuracy, triangle polar coodinate mapping and addition‐substraction technique are chosen to evaluate singular integrals. The effects of different shield…
The influence of overlap length and overlapping design on core loss and magnetizing current of single‐phase two‐leg transformer core has been investigated The investigation was performed experimentally, on scaled models, and numerically, using 2D finite element method Two types of overlapping, mitred and staggered one…
Abstract This paper reviews several procedures for the removal of instrumental contributions from measured x-ray diffraction profiles, including: direct convolution, unconstrained and constrained deconvolution, an iterative technique, and a maximum entropy method (MEM) which we have adapted to x-ray diffraction profil…
SUMMARYThe phosphating of steel in an aqueous zinc-phosphating bath has been studied. Phase formation was controlled potentiostatically and phase identification was performed by X-ray diffraction, using synchrotron radiation, which enabled the time development of phosphate coatings to be studied. Two phases are formed…
Tris(naphthalene-2,3-dioxy)cyclotriphosphazene (TNDOCTP) forms a channel-type clathrate with benzene and also a cage-type one with p-xylene. X-Ray analysis of the p-xylene clathrate showed that the cavity size and form were adequate to accommodate para-disubstituted benzenes into the cage lattice. The extracts obtaine…
This article presents an analysis of the 27 wt.% SiC whisker/A1 2 0 3 c01 posites exposed to air for periods up to 180 hours at 1100 C to 1450 C. Experimental results indicate that SiC whisker reacts with oxygen and alumina to produce a mullite-rich surface layer on tested composite specimens. The surface oxidation re…
The sliding wear behaviour of M50 and Tl high speed steels was investigated using a pin on disc machine. The wear mechanism is one of severe oxidation wear and wear damage was more severe in M50 steel; this was attributed to its lower primary carbides content. The following factors improve the wear resistance of the s…
Abstract The synthesis and lithographic characterization of the three positional isomers of polyhydroxystyrene is described. Large differences in dissolution rates are found as a function of the position of the hydroxy group, which are explained in terms of intra‐ vs. intermolecular hydrogen bonding and steric shieldi…
Article EXAFS Study of the Aging of LaNi5 and LaNi4.5Mn0.5 Compounds During Tritium Storage* was published on January 1, 1994 in the journal Zeitschrift für Physikalische Chemie (volume 183, issue 1-2).
Compressive strength of β-Titanium alloy (Ti-15V-3Cr-3Sn-3Al) has been investigated in the wide temperature range of 77 to 673K and at strain rates from 10-4 to 2×103S-1. The stress-strain relations are influenced by the change of temperature arizing from the heat conversion of plastic work, while almost independent o…
A HTS/metal/low dielectric constant polymer dielectric hybrid interconnect structure was fabricated using high density interconnect (HDI) copper/polyimide processing techniques. Nondegraded superconducting properties, J/sub c/ of over 1 MAcm/sup -2/ and T/sub c/ of 88 K, were obtained using optimum processing conditio…
In the photoreaction with 9, 10-dicyanoanthracene, tropone 1 behaved as an electron donor to give an [8π+ 4π] adduct 10via an electron-transfer mechanism in a mixed solution of MeCN–CH2Cl2(1 : 1); other products characterized were an unprecedented meta-cycloadduct 7, a trans[2π+ 4π]6, and a [4π+ 4π]–[2π+ 4π] adducts 8.
In the present study we used alginic acid and degradation products of alginic acid as carbon source for the production of biodegradable plastic, poly-β-hydroxybutyrate (PHB), by Alcaligenes eutrophus H16, and the possibility of PHB production from seaweed will be discussed