Materials Literature
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Multicomponent white cast irons contain many kinds of strong carbide forming elements in order to obtain a very hard microstructure characterized by the presence of different carbides that are well dispersed in a martensitic matrix. The heat treatment of these products consists in high temperature austenisation follow…
Life Cycle Assessment (LCA) is an environmental assessment method that has come into wide use. The LCA method has been used to assess the environmental impact of various products from domestic articles like plastic trays to large buildings. However, few LCA studies on domestic lumber have been conducted because of reg…
Unique diagnostic and access features of the DIII-D tokamak, including a sample exposure system, have been used to carry out controlled and well-diagnosed plasma-surface interactions (PSI) experiments. An important contribution of the experiments has been the ability to link a given plasma exposure condition to a meas…
Survey of desert dwellers in 102 villages in the Indian desert revealed many ethnomedicinal uses of commonly occurring Asclepiadaceous shrub called Milkweed, Calotropis procera (Ait.) R. Br. The information has been compared with 43 uses reported in previously published records and a total of 28 new medicinal uses hav…
The influence of order phenomena on the electrical and magnetic properties of a series of Fe-Si alloys is analyzed. Electrical resistivity and hysteresis loop measurements are performed on alloys after different thermal treatments, including annealing and quenching from several temperatures. Mo/spl uml/ssbauer spectro…
Abstract Grain boundary mobility has been measured in high-purity aluminum alloyed with 0.03 wt.% Zr using energy stored during plastic deformation as a driving force. In general, the dependence of mobility on grain boundary character was similar to that observed by previous authors with a maximum in mobility in the v…
Ag nanoparticles with Fe/sub 3/O/sub 4/ shells have been synthesized by the polyol method. The Ag@Fe/sub 3/O/sub 4/ core-shell nanoparticles exhibited a superparamagnetic behavior at the temperature higher than the blocking temperature (100 K) and showed shifted loops under a field cooling process. The enhanced magnet…
Amorphous melt-spun ribbons of an Nd/sub 4/Fe/sub 77.5/B/sub 18.5/ alloy were successfully transformed into bulk material by a compression shearing method. The resultant bulk material showed a low coercivity, as would be expected for an amorphous Nd-Fe-B material. Heat treatment of the amorphous bulk material above th…
The re-investigation of the chemical constituents of the bark of the stem of Symplocos racemosa Roxb. led to the isolation of two new phenolic glycosides, Symconoside A (1) and Symconoside B (2). The structures of the new compounds were determined by 1D and 2D-homonuclear and heteronuclear NMR spectroscopy, chemical e…
Novel colloidal chemical methods are employed to synthesize hcp-cobalt nanoparticles, including 12-nm particles that have coercivity at room temperature. The torque from an external field was used to partially align the particles crystallographically during self-assembly. The degree of alignment found from the remanen…
In this paper, we investigate in detail influences of A-site substitution on the EPR parameters for La/sub 0.7/Sr/sub 0.3/MnO/sub 3/ (LSM) and La/sub 0.7/Ba/sub 0.3/MnO/sub 3/ (LBM) compounds by means of electron paramagnetic resonance (EPR) study. Magnetization and resistivity measurements were also performed. The Cu…
The structural, magnetic and electric properties of the Ba(Co/sub 1-x/Mn/sub x/)O/sub 3/ oxides with x=0.00-0.25 were investigated. The samples with x=0.15,0.20, and 0.25 were found to be composed of the almost single phase of the 10H-type perovskite related crystal structure. The electric resistivity of the samples w…
Ordered mesoporous materials like SBA15 possess a network of channels and pores of well-defined size in the nanoscale range (2-50 nm). This particular pore architecture makes them suitable candidates for hosting and delivery under appropriate conditions of a variety of molecules of pharmaceutical interest, including r…
This paper discusses a method of increasing the thickness uniformity of multilayer interference coatings deposited by electron-beam evaporation in vacuum onto spherical surfaces by using a mask to screen the current of molecules of the evaporated material. Analytical expressions are obtained for calculating the shape…
We investigated the field emission properties and resistivity of polymer-based carbon films prepared from poly ethyl-co-phenyl carbyne polymer precursors after treatment at different temperatures. As the heat-treatment temperature increased from 40to1200°C, the emission threshold field decreased from 12.4to2.1V∕μm, th…
This paper deals with the computer simulation of the weft insertion process as a possible solution to avoid costly weaving trials when researching this process. A one-dimensional mathematical model of the yarn was developed, in which the behavior of the yarn is described by Newton’s Second Law. For this mathematical m…
The $\[$\varGamma(L^{1}(\varOmega;\mathbb{R}^{d}))$$ -limit of the sequence [Formula: see text] where E ε is the family of anisotropic singular perturbations E ε (u):=∫ Ω f(x,u(x),ε∇u(x)) dx of a non-convex functional of vector-valued functions E(u):=∫ Ω f(x,u(x),∇u(x)) dx is obtained where f is a non-negative energy…
Slow evaporation of a mixture of organic solvents containing meso-tetraphenylporphyrinato-magnesium(II), MgTPP and N -methyl-2-(4'- N -imidazolylphenyl)-fulleropyrrolidine, C 60 Im yielded, air stable, dark purple crystals. Determination of the structure by single crystal X-ray diffraction revealed two forms of slight…
Abst r act The crystal structure of olgite, ideally Ba (Na,Sr)2 Na [PO4]2, hexagonal, sample (I), a 5.5606(2), c 7.0450(6) Å, V 188.65(5) Å3, and sample (III), a 5.5492(2), c 7.0286(5) Å, V 187.44(4) Å3, Z = 1, D (calc.) = 3.904 (I) and 3.930 (III) g.cm–3, were refi ned in space group P3̄m1 to R1 indices of 2.73 and 2…
The point of zero salt effect (PZSE) is the soil pH value at which the magnitude of the variable surface charges is not changed due to variations in the ionic concentration of the soil solution. This property influences not only electrochemical phenomena occurring at the solid-solution interface but also the flocculat…