Comments on units in magnetism
Suggestions are g ive n on how to e xpress magne ti c q ua ntities in 51
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Crystal structure and E.S.R. of 2,2'-Bipyridylium Tris(2,2'-bipyridyl)iron(III) tetraperchlorate
The crystal structure of the title compound (C10H9N2) [Fe(C10H8N2)3] (ClO4)4 has been determined at c. 295 K from diffractometer data and refined by least squares to R 0.056 (7018 reflections with I > 3s(I)). Crystals are triclinic, Pi, a 16.607(3), b 13.496(3), c 10.254(2) ?, a 101.13(2), ß 92.08(2), ? 102.77(…
Semiconducting oxides: effects of electronic and surface structure on dissolution kinetics of nickel oxide
The effect of decreasing dissolution rate of nickel oxide per unit surface area in acid solution with increasing prior annealing temperature (700–1450°C) has been shown to occur over a wide range of pH. The linear dependence of log (rate) on pH may be explained on a model of non-oxidative dissolution in which the pH v…
Synthesis of N‐substituted bisitaconimide monomers for use as thermosetting polyimide resins
Abstract Two monomeric N ‐substituted bisitaconimides, N , N ′‐bisitaconimido‐ p , p ′‐diphenylmethane and N , N ′‐bis(itaconimido‐ p , p ′‐diphenyl ether), were synthesized from the corresponding diamines. The synthesis was accomplished by reaction of the diamine with itaconic anhydride and cyclocondensation of the r…
Reduction of the Endocochlear Potential by the New “Loop” Diuretic, Bumetanide
The effect of bumetanide upon the endocochlear potential (EP) was examined in 46 guinea pigs. The EP was reduced with dosages of 5 mg/kg or more. The maximum depression of the EP (reduction to -30 to -40 mV) was obtained at a dosage of 30 mg/kg. The recovery of the potential was incomplete at any dosage within three h…
Fracture Toughness of Powder Metallurgy and Conventionally Produced High-Speed Steels
(1978). Fracture Toughness of Powder Metallurgy and Conventionally Produced High-Speed Steels. Powder Metallurgy: Vol. 21, No. 1, pp. 13-28.
Determination of Nematic Liquid Crystal Elastic and Dielectric Properties from the Shape of a Capacitance-Voltage Curve
This paper shows how capacitance-voltage curves can be used to determine nematic liquid crystal dielectric and elastic constants and surface tilt angles. Careful analysis of the C-V curves reveals that distortion free energy theory is useful up to a V/Vc of about two. A detailed curve of tilt angle as a function of Si…
Hydrometallation of alkenes and alkynes with magnesium hydride
Conditions and catalyst have been found that cause the hydrometallation of terminal olefins with MgH2 in nearly quantitative yield.
Etude du ralentissement des ions dans une cible diatomique
Nous présentons une méthode de calcul qui permet de determiner le nombre de défauts ponctuels créés dans une cascade de déplacements initiée par un ion lourd se ralentissant dans une cible diatomique. La méthode est utilisée pour déterminer le nombre d'atomes uranium et oxygéne places par une fission dans UO2. A compu…
Corrosion Control by Deposition of CaCO3 Films: Part 3, A Practical Approach for Plant Operators
Part 3 describes the solving of water‐conditioning problems that cannot be entirely worked on the Caldwell‐Lawrence diagrams. Some practical aspects of plant operations are discussed as well.
Secondary electron emission in the scanning electron microscope
Abstract The secondary electron emission induced by electrons in the energy range 2.5–25 keV was measured in a SEM. Values of the emission coefficient for C, Al, Cu, Mo, Ag and Au are presented showing that it varies systematically with atomic number. The coefficient is still appreciable at 25 keV beam energy. The sig…
Polarized Raman studies of crystalline and amorphous orientation in polyethylene
Abstract Polarized Raman intensities have been obtained from thin films of oriented low‐density polyethylene (PE) immersed in silicone oil to minimize surface scattering. Studies were made using the 1170 cm −1 crystalline band and the 1081 cm −1 amorphous band, and from these the orientation averages 〈cos 2 θ〉 and 〈co…
Transient blood flow reduction induced by intra-arterial injection of degradable starch microspheres. Experiments on rats.
Starch microspheres, degradable by endogenous blood amylase were selectively injected into the femoral and superior mesenteric arteries, respectively, to obtain temporary local ischemia in foot and gut of the rat. The experimental models are described. Studies with tracer microspheres demonstrated, that the blood flow…
Photomechanical effects in photochromic systems
Abstract
Molecular structure and magnetic properties of trans-bis(L-methioninato)copper(II), Cu(C5H10NO2S)2
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular structure and magnetic properties of trans-bis(L-methioninato)copper(II), Cu(C5H10NO2S)2Chia-Chih Ou, Dana A. Powers, John A. Thich, Timothy R. Felthouse, David N. Hendrickson, Joseph A. Potenza, and Harvey J. SchugarCite this: Inorg. Chem. 1978, 17, 1, 34–40Public…
Theory and Application of Evaluation Tests for Detecting Susceptibility to Intergranular Attack in Stainless Steels and Related Alloys— Problems and Opportunities
The first evaluation methods for stainless steels, the 65 percent nitric acid and the copper sulfate-sulfuric acid tests, were originally simulated service tests. Later, when the results obtained with these tests were used to prevent failures by intergranular attack in other media, they were transformed into methods o…
Mechanisms of the ferroelectric and structural phase transitions. structural distortions in perovskites
The symmetry aspects of probable distortions in perovskite-like crystals are discussed. Four soft modes of the lattice which are condensed at different conditions lead to the distortions. The superpositions of the independent distortions (tilts and polar displacements) are considered and the symmetry of the phases is…
Theory of Melting, Dislocation Model. I
A theory of melting is developed based on the dislocation model, in which liquid is regarded as a crystal saturated with dislocations. It is shown that introduction of dislocations is accompanied with lattice dilatation due to lattice anharmonicity. The dilatation makes the dislocation energy per unit length a decreas…
Wittig condensation products from nickel meso-formyl-octaethyl-porphyrin and -aetioporphyrin I and some cyclisation reactions
Various Wittig condensation products from the named meso-formylporphyrins are described, together with some transformations of the products. Vilsmeier formylation of the nickel meso-vinyl derivatives causes substitution mainly in the side-chain, and acid cyclisation of the meso-acrylaldehyde products results in the fo…
Schiff-base complexes of the lanthanoids and actinoids. Part 1. Lanthanoid( III ) halide complexes with the un-ionised form of NN′-ethyl-enebis(salicylideneimine) and related bases
The Schiff base NN′-ethylenebis(salicylideneimine) and related bases, H2L, react with hydrated lanthanoid(III) halides to give the complexes Ln(H2L)Cl3·nH2O (Ln = La or Ce; n= O—2), Ln2(H2L)3Cl6·nH2O (Ln = La, Ce, Pr, Nd, Sm, Gd, Ho, or Yb; n= O–2). Ln(H2L)2X3·nH2O (Ln = La, Ce, Pr, Nd, Sm, Gd, Ho, or Yb; X = Cl or Br…