An Intriguing Copper Salt Effect upon the Photochemistry of Pyridine-N-oxides. Specific Photoinduced Syntheses of 3-Substituted 2-Formylpyrroles
e d 2 e x t e n s i v e l y .
Materials Literature
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L’anisotropie de l’aimantation : un paramètre important de l’étude de l’anisotropie magnétocristalline
Ce travail s’inscrit dans l’ensemble des études poursuivies au Laboratoire de Magnétisme du Centre National de la Recherche Scientifique à Grenoble sur l’anisotropie magnétocristalline. Cette étude constitue l’un des sujets fondamentaux du magnétisme et malgré les efforts déployés depuis de nombreuses années il n’exis…
Plasticity of β-brass Single Crystals at Low Temperatures
The plasticity of β-brass single crystals, whose tensile axes lie relatively near the [001] direction, was investigated at temperatures ranging from 77°K to room temperature. It was found that the flow stress at 0.2% strain did not continuously increase with decreasing temperature but showed a peak value at about 195°…
The Effect of Fluid Flow on the Macrosegregation in Steel Ingot
It is possible to show quantitatively the macrosegregation in steel ingot if the flow velocity of bulk liquid during solidification can be obtained. It is found that the flow velocity of bulk liquid is determined by applying the hydrodynamical method known as Taylor's vortex flow to the solidification. Using this meth…
X-Ray Photoemission Calculations
Results are presented from an extensive parametric study of x-ray photoemission. Calculations were performed of fore and back emission yield and energy-angular distribution, including the two-dimensional, asymmetric angular distribution for non-normal photon incidence, for a broad range of photon energies, angles of i…
A discussion of nucleation and growth in flow-induced crystallization from solution and an improved model for the growth process
A model must be judged on the basis of its ability to explain and predict experimental observations. We believe the model presented in this paper for the growth process and resultant morphology has been shown to be capable of explaining a wide variety of experimental observations by a number of different investigators…
Solid-State Characterization of the Structure and Property of Collagen
It was only 2 years ago that “Collagen and Gelatin in the Solid State” was discussed by Yannas [1] in this Journal. That another review follows so soon is a reflection of the breadth of the subject and the accelerating interests in this field. Unlike other biological macromolecules which have specific genetic or metab…
Die Kristallstruktur von BaTeO3
Abstract Kristalle von BaTeO 3 wurden aus Schmelzen hergestellt. BaTeO 3 ist isotyp zu KClO 3 , kristallisiert monoklin, Raumgruppe P2 1 /m, Gitterkonstanten: a = 4,63 3 , b = 5,95 2 , c = 7,30 8 Å, β = 111,2°, Z = 2. Die Kristallstruktur wurde aus dreidimensionalen Intensitätsdaten durch eine Patterson‐Synthese besti…
Fundamental properties of densified polymeric glasses
Abstract Glass forming high polymers have been densified by application of high hydrostatic pressure (∼1.5 kbar) in the melt followed by cooling under pressure to ambient. A density increase of about 1% was induced in each of the following polymers: polyvinylchloride, polymethylmethacrylate, polystyrene, poly‐4‐chloro…
Electronic absorption spectra of tetragonal and pseudotetragonal cobalt(II). II. Cobalt chloride hexahydrate and cobalt chloride hexahydrate-d12
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic absorption spectra of tetragonal and pseudotetragonal cobalt(II). II. Cobalt chloride hexahydrate and cobalt chloride hexahydrate-d12J. Ferguson and T. E. WoodCite this: Inorg. Chem. 1975, 14, 1, 184–189Publication Date (Print):January 1, 1975Publication History P…
The Morphology of Sealed Anodic Films Formed on Aluminium in Phosphoric Acid
SummaryThe long term sealing of porous anodic films, formed on aluminium in phosphoric acid, has been studied by electron microscopical examination of replicas taken from fracture sections of the film. Sealing for 72 h results in major morphological changes, particularly in the outer 2–3 μm thickness. The outer surfac…
Core structures of non screw1/2(111) dislocations on (112) planes in b.c.c. crystals. II. Peierls stresses and the effects of an external shear stress on the cores
For pt.I, see ibid., vol.5, no.1, 1 (1975). The Peierls stresses of 1 / 2 (111) non screw dislocations, the core structures of which were studied in part I, were calculated (1) by positioning the dislocation in various crystallographically non equivalent positions and (2) by simulation of the dislocation in a crystall…
The establishment of thermal equilibrium in paramagnetic crystals
An account is given of the various processes of electron spin relaxation concerned in establishing thermal equilibrium in dielectric crystals containing paramagnetic ions of the transition elements. The discussion is illustrated by reference to the experimental results, and includes some consideration of the possible…
Magnetostriction of single crystal and polycrystal rare earth-Fe2 compounds
Magnetostriction measurements on single crystal and polycrystal TbFe2 and ErFe2 are reported and compared. For TbFe2 we find the largest known room temperature magnetostriction constant: λ111=2400×10−6. For ErFe2: λ111=−300×10−6. λ111 is the dominant magnetostriction constant and the major source of the magnetostricti…
Hydrogen in metals
УСПЕХИ ФИЗИЧЕСКИХ НАУК 546[.11+.3]:53ВОДОРОД В МЕТАЛЛАХ Е. Г. Максимов, О. А. Панкратов СОДЕРЖАНИЕ 1. Введение 385 2. Диффузия водорода в металлах 386 3. Фазовые переходы и структура соединений Me -II 392 4. Электронные свойства соединений Me -Η 397 5. Сверхпроводимость в системах Me -Η 403 6. Заключение 410 Цитирован…
Electronic absorption spectra of tetragonal and pseudotetragonal cobalt(II). I. Dipotassium tetrafluorocobaltate, dirubidium tetrafluorocobaltate, dipotassium magnesium tetrafluorocobaltate, and dirubidium magnesium tetrafluorocobaltate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic absorption spectra of tetragonal and pseudotetragonal cobalt(II). I. Dipotassium tetrafluorocobaltate, dirubidium tetrafluorocobaltate, dipotassium magnesium tetrafluorocobaltate, and dirubidium magnesium tetrafluorocobaltateJ. Ferguson, T. E. Wood, and H. J. Gugg…
Cyanoporphyrins. Co-ordinating and electrochemical properties
Successive substitutions in the pyrrole rings of tetraphenylporphyrin by up to four cyano-groups lead to large additive anodic shifts of the redox potentials. These shifts are large than those observed with other electron-withdrawing substituents. The stoicheiometry and stability of the complexes formed from metallote…
Cyclization in crosslinking polymerization. I. Chain polymerization of a bis unsaturated monomer (monodisperse case)
Abstract Cyclization in the chain polymerization of bis unsaturated monomers has been treated by cascade formalism based on primary chains for a kinetically controlled reaction. The primary chains consist of repeat units bearing an unreacted (pendent) double bond and units engaged in effective branchings (crosslinks),…
Hot‐Working of Aluminum Oxide: II, Optical Properties
Polycrystalline Al 2 O 3 fabricated into plates or shapes by hot‐working techniques exhibits high in‐line transmittance from 0.4 to 5.5 μm. Examination of the product by an inverse pole figure technique demonstrated a strong {0001} texture normal to the pressing direction for both equiaxed and textured microstructures…
Crosslinked styrene/divinylbenzene network systems
Abstract