Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of Stability and Reactivity of Synthetic Cryptomelane-like Manganese Oxide Octahedral Molecular SievesYuan-Gen Yin, Wen-Qing Xu, Roberto DeGuzman, Steven L. Suib, and C. L. O'YoungCite this: Inorg. Chem. 1994, 33, 19, 4384–4389Publication Date (Print):September 1, 19…
Two genes encoding the enzymes malate synthase G and glycolate oxidase, have been linked to locus glc (64.5 min), responsible for glycolate utilization in Escherichia coli. The gene encoding malate synthase G, for which we propose the notation glcB, has been cloned, sequenced and found to correspond to a 2262-nucleoti…
During the manufacturing of present-day integrated circuits, certain measurements must be made of the submicrometer structures composing the device with a high degree of repeatability. Optical microscopy, scanning electron microscopy, and the various forms of scanning probe microscopies are major microscopical techniq…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular dynamics simulation of atactic polystyrene. 2. Comparison with neutron scattering dataHidemine Furuya, M. Mondello, Hyung-Jin Yang, Ryong-Joon Roe, R. W. Erwin, C. C. Han, and S. D. SmithCite this: Macromolecules 1994, 27, 20, 5674–5680Publication Date (Print):Sept…
Having studied scientific publications of the last 75 years, the author compares and contrasts developments in shape description across many disciplines as well as the strengths and weaknesses of available techniques. Uses numerous illustrations and copious examples to explain quantification of 2-D shape without mathe…
Abstract Measurements of cutting resistance have been made for a crosslinked styrene—butadiene copolymer over a wide range of cutting speeds and temperatures. A characteristic fracture energy was determined using the procedure of Lake and Yeoh. A lower limit, about 150 J/m 2 , was obtained at low cutting speeds. This…
The crystal structures of synthetic 7 angstrom and 10 angstrom manganates, synthetic birnessite and buserite, substituted by mono- and divalent cations were investigated by X-ray and electron diffractions. The monoclinic unit cell parameters of the subcell of lithium 7 angstrom manganate, which is one of the best orde…
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Trace amounts of poly[(R)-3-hydroxybutanoate] were isolated from competent Escherichia coli, spinach, bovine serum albumin, beef heart mitochondria, and aortal tissues, all sources in which it is not accumulated as storage material. Its identity was in all cases proved by 1H-NMR spectroscopy. In some runs, the poly[(R…
A simple procedure was devised for the preparation of a standard KCl powder to be used for the experimental determination of the instrumental profile in the Bragg–Brentano geometry. The standard was tested on several diffractometers, and narrow Bragg reflections in the range 28°–132° were recorded adopting various exp…
Abstract A sepiolite from Vallecas (Spain) was treated with solutions of HC1 (1.25, 2.5, 5.0, 10.0 and 20.0 wt%) at 25°C for 2, 6, 24 and 48 h, respectively. The resulting solids were characterized by XRD, FT-IR and thermal analyses, along with SEM, TEM and nitrogen adsorption isotherms at 77 K. The free silica was di…
Abstract A new model of silica's aggregation in rubber, the Hexagon-linking Model, is proposed and tested in this study, using transmitting, scanning and analytical electron microscopy. When wetted in rubber, silica tends to accumulate, by way of hexagonal rings, differently from carbon black; the “wetted” states can…
Abstract The preparation and isolation in the solid state of five aryl 1,2,3,5‐dithia‐ and diselenadiazolyls is reported. The structure of the dimer of 4‐ClC 6 H 4 CN 2 S 2 in the solid state was obtained: monoclinic, C2/c with Z = 8, a = 20.982(10), b = 10.058(3), c = 15.867(6) Å, β = 93.34(4)°, R = 0.066, R w = 0.…
Single- and three-phase broad-beam x-ray attenuation data have been obtained using lead, steel, plate glass, gypsum wallboard, lead acrylic, and wood. Tube voltages of 50, 70, 100, 125, and 150 kVp were employed and the resulting curves were compared to transmission data found in the literature. To simplify computatio…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation K. Hongladarom, V. Secakusuma, W. R. Burghardt; Relation between molecular orientation and rheolo…
Abstract SBR compounds containing ground vulcanizates of known composition and cure state were prepared and the cure behavior studied. Decreases in scorch times and maximum rheometer torques were observed when ground vulcanizates were added to the SBR compounds. Two primary phenomena are proposed to explain these find…
We report the results of a theoretical study of the interaction between aluminum and poly(p-phenylenevinylene) and derivatives of poly(p-phenylenevinylene). This allows us to investigate the initial stages of formation of the metal/conjugated polymer interface. Applying the semiempirical Austin model 1 method, we find…
The Jiles-Atherton (J-A) model is applied to the problem of describing the dynamics of a nonlinear circuit driven by a square wave voltage source and comprising a linear resistor and capacitor in series with a nonlinear inductor, whose core displays saturation and hysteresis. The presence of hysteresis is shown to inc…
Corrosion behavior of grade 550 (X-80) pipeline steel with coating disbondments was studied in a range of bicarbonate (HCO3−) solutions using a potentiodynamic polarization technique. Corrosion morphology of the steel was examined using optical and scanning electron microscopy. The shape of the polarization curves and…
Genetic engineering offers the potential for creating new proteins with novel materials properties. The aim of this study is to develop strategies for incorporating the non-natural amino acid p-fluorophenylalanine (pfF), which is known to be utilized by the Escherichia coli protein synthesis apparatus, into repetitive…