Materials Literature
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A vector hysteresis model is experimentally tested for two soft magnetic materials in the two-dimensional case. The model expresses net magnetization as a sum of contributions from a number of pseudoparticles, each one having a dry friction-like hysteresis mechanism. Five adjustable parameters are used to represent hy…
The paper reports an experimental low-temperature study of the temperature-dependent behavior of the lattice constants, heat capacity, and thermal conductivity of the AlN ceramic. The results obtained are compared with the data available for the high-temperature region. The thermal expansion coefficient is found to be…
Quantum chemical calculations using the density functional theory were performed to model the mechanism of selective catalytic reduction of NO by NH3 on a supported vanadium oxide monolayer. In the first step, the adsorption of NH3 on a bimetallic cluster representative of vanadium oxide, containing a terminal V(DOUBL…
A twisted semi-hard magnetic wire of Vicalloy with composition of Fe/sub 41/Co/sub 48/V/sub 11/ revealed remarkable uniaxial magnetic anisotropy along central axis direction of the wire and showed a difference in coercivity between outer shell and inner core of the wire. Also the wire remained the large torsion stress…
Transgenic suspension cultures of Black Mexican Sweet maize (Zea mays L.) expressing the Alcaligenes eutrophus genes encoding enzymes of the pathway for biosynthesis of the biodegradable polymer poly(beta-hydroxybutyrate) (PHB) were established as a tool for investigating metabolic regulation of the PHB pathway in pla…
Abstract The hybrid donor between bis(ethylenedithio)tetrathiafulvalene and -tetraselenafulvalene (ET and BETS, respectively) has been synthesized and the electrical properties together with the crystal structures of its cation radical salts investigated. All of the crystals studied by X-ray structural analysis turned…
Nickel-Titanium alloys with stoichiometric single phase and non-stoichiometric dual phase structures of NiTi and NiTi+Ni3Ti are produced through high speed induction melting and combustion synthesis of pure Ti/Ni elements. Both alloys are homogenized at 1273 K for two hours, rolled into thin strips of 0.3 mm thickness…
We consider the adsorption of mutiblock copolymers made of a regular succession of 2 N consecutive sequences of Z monomers of alternating species A and B, respectively. These eventually adsorb at the interface between two immiscible, good but selective solvents for the different species. We consider the various surfac…
Self-assembled monolayers (SAMs) were formed from ω-substituted alkanethiols, namely (1-mercaptoundec-11-yl)hexa(ethylene glycol) (HS(CH 2 ) 11 (OCH 2 CH 2 ) 6 OH) and 1-dodecanethiol (HS(CH 2 ) 11 CH 3 ), on the surface of planar gold films and on colloidal gold particles. A quantitative method for studying the physi…
Ruthenium(II) complex salts trans-[Ru(NH 3 ) 4 (L D )- (L A )][PF 6 ] 3 (L D = an N-donor ligand, L A = a 4,4′-bipyridinium ligand) exhibit large, tunable static first hyperpolarizabilities β 0 which are associated with intense, visible metal-to-ligand charge-transfer excitations.
Silsesquioxanes are a unique class of three-dimensional polyhedral silicon oligomers that have progressively begun to occupy a sizeable niche in polymer chemistry. This review focuses on the methods required to synthesize potentially useful silsesquioxanes, and takes a brief look at their applications as silicon-based…
SummaryConsiderable efforts are being made to improve the corrosion resistance of zinc coatings by alloying and application of compatible conversion coating treatments. These new systems have the potential for reliable and cost effective protective coatings on steel used in construction applications.The present invest…
The oxidation of carbothermally synthesised β′-sialon powder (z=2.45) was found by X-ray powder diffraction and solid-state 29 Si and 27 Al MAS NMR spectroscopies to result in the initial formation of amorphous SiO 2 and a non-crystalline mullite-like aluminosilicate which becomes crystalline at higher temperatures. T…
Layered double hydroxides (LDHs) containing cadmium as the divalent metal and aluminium as the trivalent metal have been prepared by coprecipitation from a mixed metal nitrate solution, and were obtained with nitrate and carbonate as the counter anions, and as single crystalline phases. XRD patterns show that these LD…
The strength of the “all-round (two-way) shape memory effect” and the work we can gain by using this effect were investigated. The alloy used was a Ti-51 (at%)Ni alloy. In order to align particles of Ti3Ni4 precipitate, plate-shaped specimens were aged at 773 K for 6 ks under several different tensile-stresses. Therma…
The use of shape memory alloy (SMA) wires as active tendons to reduce vibra-tion of a building model is analytically investigated. Approximate dynamic equations for one bay of a multi-story building with SMA tendons are derived based on laws of thermodynamics and Brinson's constitutive equations. These equations are u…
Influences of Ni impurity on the removability of primary scale in hydraulic descaling were investigated in 0.02 and 0.1 mass% Si mild steels. And the thickness distribution of residual scale was discussed in relation to the unevenness of the scale/steel interface. The removability of primary scale reduced due to the e…
We describe the growth and spectroscopy of well-defined mixed crystals of KH2PO4 (KDP) containing both natural and synthetic organic dyes in the {010} and {101} growth sectors. Our summary reevaluates historical dye inclusions, reveals others discovered in a directed screening, and ultimately describes dyes rationally…
The influence of cellular surface hydrophobicity on the adherence capacity to plastic of Candida albicans was investigated at two culture temperatures (37 and 22 degrees C). The majority of the 42 strains studied were hydrophobic at 22 degrees C and hydrophilic at 36 degrees C. The hydrophobic cells showed a consisten…
Ab-initio X-ray powder diffraction (see cover for typical spectra) is shown to be a powerful structural tool for (i) insoluble, thermally unstable, compounds which cannot be (re)crystallised from solution or from the melt; (ii) metastable phases destroyed or modified upon manipulation; (iii) twins; (iv) very small cry…