Materials Literature
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The role of the twin planes in the rapid dendritic propagation of germanium crystals is examined on the basis of corner nucleation. A model is proposed, and it is shown that at least two twin planes must be present for continued easy propagation in <211> directions, in good agreement with experimental ob…
The motivating factor for this investigation of the magnesium-hydrogen system was the recent interest in the hydride of beryllium. Although beryllium hydride has been prepared by the pyrolysis of di-t-butylberyllium, no evidence for the direct union of beryllium and hydrogen has been reported. It was thought that an e…
1. Introduction 831 2. Geometry of Constant-Energy Surfaces for Electrons 833 3. Classical Mechanics of a Particle with an Arbitrary Dispersion Law 835 4. Collisions of Quasiparticles. Scattering 841 5. Quasiclassical Energy Levels 843 6. Quantum Mechanics of an Electron with an Arbitrary Dispersion Law 848 7. Quantum…
Abstract 2‐Hydroxy‐naphthochinon‐(1.4) bzw. 4.6‐Dihydroxy‐chinolinchinon‐(5.8) werden mit verschieden substituierten o ‐Aminophenolen zu Phenoxazonen kondensiert. Die Ausbeuten an Phenoxazonen werden vom Molverhältnis der Komponenten und der Basizität der o ‐Aminophenole bestimmt. o ‐Hydroxy‐anilino‐naphthochinone sin…
Abstract Durch eine auf CN‐Doppelbindungen abgestimmte Reduktion sowie durch Spaltung und Teilsynthese (aus Uscharidin und Cysteamin) wird gezeigt, daß das „Voruscharin”︁ ein Thiazolidinderivat ist, das sich mit einer offenen Thiolform im Gleichgewicht befindet.
Abstract Eggs of flies of the families Sepsidae, Drosophilidae, Sphaeroceridae, Muscidae, and Cordiluridae may have one or more tubular or flattened projections from the anterior part of the shell. These projections are called respiratory horns. The eggs are laid in decomposing vegetable or animal matter. The respirat…
The light output of NaI(Tl) was measured as a function of energy for ions of ${\mathrm{He}}^{4}$, ${\mathrm{B}}^{10}$, ${\mathrm{B}}^{11}$, ${\mathrm{C}}^{12}$, ${\mathrm{N}}^{14}$, ${\mathrm{O}}^{16}$, ${\mathrm{F}}^{19}$, and ${\mathrm{Ne}}^{20}$ from approximately 1.0 to 10.0 Mev/nucleon. The particle energy was va…
Optical properties of solid copper have been measured in a wavelength range from 0.365 to 2.5 microns and at temperatures 90\ifmmode^\circ\else\textdegree\fi{}, 300\ifmmode^\circ\else\textdegree\fi{}, and 500\ifmmode^\circ\else\textdegree\fi{}K. Annealed and electropolished specimens were used. Measurements were done…
A method of correcting experimental small angle x-ray scattering curves for the effects of the height of the collimating slits is developed. The method has the advantage of eliminating the need for numerical differentiation of the experimental curve. An expression suitable for numerical calculation is given, and an an…
RETURN TO ISSUEPREVAdvertisementNEXTSOLID STATE ELECTRONICSCite this: Chem. Eng. News 1960, 38, 23, 12Publication Date (Print):June 6, 1960Publication History Published online6 November 2010Published inissue 6 June 1960https://doi.org/10.1021/cen-v038n023.p012Copyright © 1960 American Chemical SocietyArticle Views4Alt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermogravimetric and Differential Thermal Analysis of (Ethylenedinitrilo)tetraacetic Acid and Its DerivativesWesley W. WendlandtCite this: Anal. Chem. 1960, 32, 7, 848–849Publication Date (Print):June 1, 1960Publication History Published online14 July 2003Published inissue…
Summary Methods have been described for the determination of the crystallinity of potato starch, based upon the X‐ray diffraction technique of H ermasns and W eidinger . The crystallinity of air‐dry native potato starch is 21%; that of the moistened, natioe starch is 28%. Air‐dry Lintnerized potato starch is 27% cryst…
An Einkristallen von NaNO 2 wurde bei Zimmertemperatur die Quadrupolkopplungskonstante bestimmt. Es wird ∣ e 2 q Q/h ∣ = 1100,3 ± 0,8 kHz erhalten. Der Asymmetrieparameter η= (φ xx — φ yy )/φ zz ist 0,1092 ± 0,0009. Die Hauptachsen des Quadrupolkopplungstensors fallen mit den orthorhombischen Kristallachsen zusammen,…
The indentation hardness test is being investigated as a means of studying the behavior of rock under stress sufficiently great to be of geologic interest. In this study, indentation and compression of a limestone, marble, anhydrite, and artificial rock salt are compared. Indentation of these rocks with a 136° pyramid…
Abstract Platin verflüchtigt sich beim Erhitzen in Gegenwart von Sauerstoff als Dioxyd. Das Gleichgewicht Pt + O 2 = PtO 2 g wurde zwischen 1107 und 1208°C gemessen. Dafür gilt .
Abstract In continuation of previous kinetic work on the hydrolytic polymerization of εcaprolactam (CL) (Part I–III) in which evidence was obtained that all the predominant reactions are catalyzed by endgroups, special experiments were undertaken in order to study the specific role played by the NH 2 and COOH endgroup…
Abstract Gleichgewichtsmessungen mit der Mitführungsmethode, bei denen Iridium bzw. Iridiumdioxyd im Sauerstoff‐ oder Sauerstoff—Stickstoffstrom erhitzt wurden, führten zu dem Ergebnis, daß die bekannte Flüchtigkeit des Iridiums in Gegenwart von Sauerstoff auf der Bildung des Trioxyds IrO 3 beruht. In Übereinstimmung…
The crystal structure of PbNb2O6 consists of a framework of NbO6 octahedra linked through corners. The Pb2+ ions occupy 5 out of the 6 available interstitial sites in this framework. Single-phase compositions have been prepared by solid-state reactions to yield nonstoichiometric compounds of the form A1+xB2O6 where A…
Paramagnetic susceptibilities of Fe and Fe-Si alloys (5.75, 6.82, 9.45, 12.65, 14.70, 18.11, 20.85, and 24.38 at. % Si) have been measured up to 1200°C. At high temperatures the paramagnetic susceptibilities of bcc Fe-Si alloys obey the Curie-Weiss law, possibly indicating that the contribution due to s-d exchange int…
Abstract Films of low‐density polyethylene which were exposed to a corona discharge in oxygen at a pressure of 1 atm. lost weight and decreased in thickness due to oxidation of the surface to volatile products (principally carbon dioxide and water). The weight loss was directly proportional to the time of exposure and…