Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Experimental studies of diethyl adipate saponification in a CSTR show that forced cycling of feed composition produces significant yield increases in intermediate product relative to the optimal steady state operation, while forced temperature cycling has much less effect. Related experiments provide useful t…
Drei unterschiedliche, isolierte anionische SbSe-Gruppen - die ersten Selenoantimonat(III)-Ionen überhaupt - sind in Ba4Sb4Se11 enthalten. Die formale Verknüpfung von Pyramiden zu zweikernigen Gebilden war bei SbIII-Verbindungen bisher nicht bekannt. (Graue Kreise: Sb, weiße Kreise: Se.)
Abstract The hyperfine fields at Fe and Sn, as determined by Mössbauer effect and NMR, in a new Heusler alloy Ru 2 FeSn, are reported. By comparison with corresponding data in rhodium based Heusler alloys, it is inferred that a preferential R–Sn (R = Ru or Rh) disorder exists in these alloys. The hyperfine field data…
BaZnSnS 4 and BaMnSnS 4 were prepared for the first time and the atomic positions of the crystal structure were refined. Both compounds crystallize isotypically with BaCdSnS 4 [1]. Space group C 19 2v -Fdd2 (No. 43) orthorhombic. BaZnSnS 4 : a = 2196, 4 ; b = 2150, 4 ; c = 1270, 1 pm; BaMnSnS 4 : a = 2173, 1 ; b = 214…
A calculation of γ(r), the correlation function which gives the X-ray scattering of a cubic object of uniform density, is given for the full range of r. A new method, which can be applied to other systems, is used. The function γ(r) and its first derivative are everywhere continuous, but γ′′(r) is discontinuous at r =…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoal tar coatings of storage tanks. A source of contamination of the potable water supplyKatherine. AlbenCite this: Environ. Sci. Technol. 1980, 14, 4, 468–470Publication Date (Print):April 1, 1980Publication History Published online1 May 2002Published inissue 1 April 1980ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe role of hydrogen bonding in the formation of bile salt micelles. 2. A demonstration of geometric effects on the stabilizing role of hydrogen bondingL. R. Fisher and D. G. OakenfullCite this: J. Phys. Chem. 1980, 84, 8, 936–937Publication Date (Print):April 1, 1980Publica…
Phase transitions involving one or more of the three properties: electrical resistivity, crystal structure, and antiferromagnetic ordering, occur in ${({\mathrm{V}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x})}_{2}{\mathrm{O}}_{3}$ with $x$ of the order of ${10}^{\ensuremath{-}2}$. In a previous study of Raman scattering in $…
Coordination polyhedra in crystals are identified by matching interbond angle matrices for observed and ideal polyhedra. An algorithm for permuting the N vertices of the observed polyhedron is described in which not all of the N! combinations are examined. The method has been used to identify a number of higher-coordi…
The development and use of electron and X-ray diffraction techniques to study the structure of grain boundaries in crystalline materials is reviewed. The fundamental questions that need to be answered about the structure of boundaries are discussed. The scattering expected from a small-angle twist boundary is calculat…
The steam electrolysis between 800° and 950°C has been investigated with a cell consisting of the following elements: electrolyte, 400μ of ytterbia stabilized zirconia; anode, 100μ of vacuum deposited tin doped india; cathode, a sputter deposited cermet of nickel and urania doped ytterbia stabilized zirconia. These ce…
The discovery, at Chalk River Nuclear Laboratories, of a simple method of wetproofing platinum catalysts so that they retain their activity in liquid water stimulated a concentrated research program for the development of catalysts for the hydrogen-water isotopic exchange reaction. This paper reviews 10 years of study…
The effect of two-magnon-one-phonon scattering processes on the lattice thermal conductivity of antiferromagnets is studied. Transition matrix elements are obtained by expansion in lattice displacements of the exchange and anisotropy for an anisotropic Heisenberg Hamiltonian. Relaxation times for the phonons are deter…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBi- and polynuclear antiferromagnetic metal complexes (copper,nickel) with salicylaldimines and acetate-type ligands. New modes of acetate bridgingRay J. Butcher, John W. Overman, and Ekk SinnCite this: J. Am. Chem. Soc. 1980, 102, 9, 3276–3278Publication Date (Print):April…
The apparatus described is based on the Faraday law of electromagnetic induction and is especially suited for toroidal samples of ferrimagnetic compounds. The measurements can be performed at frequencies from 1 to 100 kHz and temperatures from 80 to 900K. In addition to the initial permeability and the Curie temperatu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Kinetics of Porphyrin Hydrodemetallation. 2. Vanadyl CompoundsChi-Wen Hung and James WeiCite this: Ind. Eng. Chem. Process Des. Dev. 1980, 19, 2, 257–263Publication Date (Print):April 1, 1980Publication History Published online1 May 2002Published inissue 1 April 1980http…
Slow cooling of a hot acetonitrile solution of tetrathiafulvalene (TTF) and iodine yields a mixture of crystalline products including monoclinic crystals of high iodine composition: TTF I3. A single crystal X-ray structure analysis has been carried out on these crystals of symmetry P2 sub 1/n with 4 molecules per unit…
The thermal decomposition of solid PVC was studied in the presence of added hydrogen chloride and hydrogen bromide over the temperature range 170–210°C. Under certain conditions the decomposition was shown to be dependent in a first-order manner on the hydrogen halide pressure. These gases acted as catalysts, increasi…
The toughening mechanism was investigated by means of mechanical and optical techniques including electron microscopy and polarized light scattering for wide variety of domain morphologies of di-and triblock copolymers and their blends with corresponding homopolymers. Two types of plastic deformation mechanisms of gla…
Abstract The crystallization behavior of high density polyethylene/isotactic polypropylene blends (HDPE/PP) was investigated. The overall kinetics of crystallization of HDPE may be strongly influenced by the addition of a small fraction of PP. At 398 K the half crystallization time of the blend containing 10% by weigh…