Materials Literature
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Abstract The assembly of cell wall components, cellulose and xyloglucan (XG), was investigated at the atomistic scale using molecular dynamics simulations. A molecular model of a cellulose crystal corresponding to the allomorph I β and exhibiting a flexible complex external morphology was employed to mimic the cellulo…
This paper deals with the effect of supply frequency on partial discharge phenomena. Results of measurements performed on artificial and practical test objects are compared with computer simulations based on physical models. This comparative analysis points out and explains the differences in partial discharge phenome…
Transparent luminescent nanocomposites were obtained using the bulk polymerization of transparent dispersions containing manganese-doped ZnS nanoparticles with a crystallite size of 2 nm in a mixture of methyl methacrylate and acrylic acid. The effective diameter in the monomer dispersions is 22 nm as determined using…
The article “From Masurium to Trinacrium: The Troubled Story of Element 43” is the best story so far published about the history of technetium. There is, however, one paragraph on the right column of page 226 that is questionable.
Conventional methods often impose difficulties when measuring the viscosity of fluids containing particles or fibres, e.g. tomato paste or fruit preparations, mainly due to the narrow gaps of the viscometer. In order to solve these problems different geometries have been developed, e.g. different mixer systems and wid…
The yielding behavior of two model electrorheological suspensions of uncoated silica particles and silica coated with polyaniline base in silicone oil using controlled shear rate and controlled shear stress experiments has been analyzed. The results demonstrate that unlike the uncertain dynamic yield stress values est…
Rheological properties of food fluids are useful for quality control, texture evaluation, and food structure determination. The rheological behavior is dependent on the size, form and concentration of solids in suspension and the system structure. Star fruit (Averrhoa carambola L.) pulp was obtained from the crude fru…
Melliniite, ideally (Ni,Fe) 4 P, is a new mineral from the Northwest Africa 1054 acapulcoite. It occurs as anhedral to subhedral grains up to 100 µm, associated with kamacite and nickelphosphide. Melliniite is opaque with a metallic luster and possesses a gray streak. It is brittle with an uneven fracture; the Vickers…
Summary Bentonite has attracted great interest in nuclear waste management because of its outstanding properties. Herein, the sorption and complexation of cobalt on bare bentonite and fulvic acid (FA) coated bentonite are studied, respectively, under ambient conditions. The experiments are carried out at T = 25 ± 2 °C…
One-phonon and multiphonon excitations of the single-crystalline LaCoO3 were studied using Raman spectroscopy in the temperature region 5–300K. First-order Raman spectra show a larger number of phonon modes than allowed for the rhombohedral structure. Additional phonon modes are interpreted in terms of activated modes…
The magnetic properties of Na2CuP2O7 were investigated by means of 31P nuclear magnetic resonance (NMR), magnetic susceptibility, and heat capacity measurements. We report the 31P NMR shift, the spin-lattice 1/T1, and spin-spin 1/T2 relaxation-rate data as a function of temperature T. The temperature dependence of the…
Abstract The effect of pyrene distribution within pyrene‐functionalized random and block copolymers on noncovalent polymer/single‐walled carbon nanotube (SWNT) interactions was investigated. The block copolymers served as superior solubilizing agents in comparison with the random copolymers. Also, increasing the pyren…
The Industrial test of steel making of high speed steel M2(0.80～0.90C,3.8～4.4Cr,5.50～6.75W, 4.5~5.5Mo,1.75～2.20V)by direct reduction and alloying with scheelite,molybdenum oxide and V2O5ore has been carried out in a 20 t electric arc furnace at Chongging Special Steel.The results showed that the alloying rate was up t…
The low alloying high strength weather-resisting steel SPA-H strip-C≤0. 12,Mn 0.20~0.50,Si0.25~0.75,P0.07~0. 15,S≤0.04,Cu0.25~0.60,Cr0.30~1.25,Ni≤0.65 has been trial-produced by flow sheet of& an 100 t electric arc fumnace-ladle furnace-concaster-rolling mill at Nanjing Steel. The results of examination and service sh…
Hie Al2O3dissolution rate of casting mold powder CaO-SiO2-Na2O-CaFi-Al2O3-MgO series has been measured by dissolution rate measuring apparatus. Hie inclusion absorption ability of mold powder for Al-killed steels could be predicted accurately by established regression analysis model for relation between Q dissolution…