Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLattice model for crystal-amorphous interphases in lamellar semicrystalline polymers: effects of tight-fold energy and chain incidence densitySanat K. Kumar and Do Y. YoonCite this: Macromolecules 1989, 22, 8, 3458–3465Publication Date (Print):August 1, 1989Publication Histo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetism of alternating bimetallic chains: application to triaqua(oxamido-N-benzoato-N-propionato)coppermanganese monohydrateYu Pei, Keitaro Nakatani, Olivier Kahn, Jorunn Sletten, and Jean Pierre RenardCite this: Inorg. Chem. 1989, 28, 16, 3170–3175Publication Date (Print)…
This study was conducted to determine which of eight different extractants best described the K-supplying capacities of nine southern Ontario soils. The total amount of K extracted by eight crops of alfalfa grown in the greenhouse was related to soil K by regression techniques. The following procedures extracted incre…
The μ-carbido dimer [(PcFe)2C] and its derivatives of formula [{(L)PcFe}2C] (L = acetone, pyridine, 4-methylpyridine, 1-methylimidazole, piperidine) have been prepared and studied by IR, Mössbauer, EPR, and NMR spectroscopy and magnetic susceptibility determinations. All of the complexes appear to contain Fe(IV). © 1…
The luminescence of Gd3+ in YOCl is reported. From temperature dependent emission spectra and decay measurements, the Judd–Ofelt parameters Ω2 and Ω6 of Gd3+ in YOCl are obtained: Ω2=2.97×10−23 m2 and Ω6=8.65×10−24 m2. The relative consistency of Ω2 and Ω6 is confirmed by measuring the 8S7/2→6D9/2 and 6I7/2 transition…
Dielectric, optical and elastic properties of dimethylaminaluminiumsulphate crystals were studied. The crystal is shown to undergo a nearly tricritical second order phase transition with the symmetry change 2/m–m at Tc = 150 K. The transition can be classified as a proper ferroelectric one of the order-disorder type.…
Surface-enhanced Raman spectrometry (SERS) on a silver-coated filter paper substrate of nitrogen-containing organic molecules is reported. A correction procedure for standardization of measurements is proposed and evaluated to solve the difficult problem of quantitation of adsorbate in SERS. The relative standard devi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,2,3,5-Dithiadiazolium cations and 1,2,3,5-dithiadiazolyl radicals: an ab initio computational, ultraviolet photoelectron spectroscopic, and crystallographic study of a cation/radical pairA. Wallace Cordes, John D. Goddard, Richard T. Oakley, and Nicholas P. C. WestwoodCite…
Spherical‐impact damage to two silicon nitrides is investigated. Gas‐pressure‐sintered silicon nitride exhibits an elastic response to impact by spherical partially stabilized zirconia particles, resulting in Hertzian cone‐crack initiation in the sintered body. Pressureless‐sintered silicon nitride, on the other hand,…
Glasses containing as little as 5 mol % B2O3 have been made in the ternary system PbO-PbF2-B2O3. Glass transformation and crystallization temperatures, thermal expansion behavior, and electrical conductivity of these glasses have been measured. The lead fluoroborate glasses appear to be anion conductors, with conducti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparative study of redox reactions of polyaniline films in aqueous and nonaqueous solutionsAkira Watanabe, Kunio Mori, Maki Mikuni, Yoshiro Nakamura, and Minoru MatsudaCite this: Macromolecules 1989, 22, 8, 3323–3327Publication Date (Print):August 1, 1989Publication Histor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrinsic viscosity of oligo- and polystyrenesYoshiyuki Einaga, Hitoshi Koyama, Toshiki Konishi, and Hiromi YamakawaCite this: Macromolecules 1989, 22, 8, 3419–3424Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published inissue 1 August…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTShear modification of low-density polyethylene: its origin and its effect on the basic rheological functions of the meltP. J. R. Leblans and C. BastiaansenCite this: Macromolecules 1989, 22, 8, 3312–3317Publication Date (Print):August 1, 1989Publication History Published onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and structural characterization of a six-coordinate 21-thiaporphyrin complex: RhIII(STPP)Cl2 (STPP = tetraphenyl-21-thiaporphyrin anion)Lechoslaw Latos-Grazynski, Jerzy Lisowski, Marilyn M. Olmstead, and Alan L. BalchCite this: Inorg. Chem. 1989, 28, 17, 3328–333…
G\"utlich et al. [Chem. Phys. Lett. 91, 348 (1982)] observed an ``unusual'' two-step high-spin\ensuremath{\rightleftarrows}low-spin transition in the spin crossover compound [Fe(2-pic${)}_{3}$]${\mathrm{Cl}}_{2}$\ensuremath{\cdot}${\mathrm{C}}_{2}$${\mathrm{H}}_{5}$OH. Recently, Petrouleas and Tuchagues [Chem. Phys. L…
Ferroelectric microregion (FMR) in SrTiO3 has been studied by means of Raman scattering. With lowered temperature, FMR, shape of which is ellipsoidal, increases the size concurrently with the correlation length. The ferroelectric transition of solid solution system such as Sr1−x Ca x TiO3 sets in when the FMR occupy t…
Interconversion of D- and L-isomers of 3-hydroxy-decanoyl-CoA was catalyzed by rat liver homogenate. Cation exchange chromatography followed by ammonium sulfate precipitation and PBE-94 chromatofocusing column was used to separate the peroxisomal bifunctional protein, the classic 2-enoyl-CoA hydratase (crotonase), and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle and double photoionization processes in naphthalene between 8 and 35 eVEckart Ruehl, Stephen D. Price, and Sydney LeachCite this: J. Phys. Chem. 1989, 93, 17, 6312–6321Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published iniss…
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More
A simple model for tapering optical glass fibers is described and analysed to show that unless the initial conditions have certain spatial singularities, the cross-sectional area cannot be made to vanish in finite time. The model is applied to an industrial process in which the fiber has piecewise uniform temperature.