226. Copper(II) halides as halogenating agents
D. C. Nonhebel, J. Chem. Soc., 1963, 1216 DOI: 10.1039/JR9630001216
Materials Literature
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Die Cardenolide der Samen von Mallotus philippinensis (LAM.) MÜLL.‐ARG. (= Rottlera tinctoria ROXB.). Glykoside und Aglykone, 252. Mitteilung
Abstract The seeds of Mallotus philippinensis (Lam.) Muell.‐Arg. were found to contain 4 cardenolides (A, B, C and D) after fermentation. Two new glycosides, C and D, were obtained in crystalline form and were shwon to be corotoxigenin‐rhamnoside and coroglaucigenin‐rhamnoside respectively. The minor constituents A an…
Water sorption in dielectrics. Evaluation of some thermodynamic properties
The first page of this article is displayed as the abstract.
Oxygen-Controlled Conduction in Thin Films of Cuprous Iodide: A Mixed Valency Anion Semiconductor
Oxygen present in cuprous iodide greatly increases the electrical conductivity. Copper films were formed with differing oxygen contents by copper vapor condensation at various oxygen pressures. After iodination to the conductivity was found proportional to the 1/8.4 power of the oxygen pressure during condensation. Cu…
Color Center Formation by Pulse Irradiation of Alkali Halides
Abstract Preliminary observation is made of the absorption spectra of four alkali halides (LiF, NaCl, KCl, and KBr) at various intervals after bombardment, at room temperature, with a 2 microsecond pulse of 2 MeV electrons. The absorption is measured spectrographically using an underwater uranium spark light source wh…
Melting transitions in diene polymers
Abstract The melting transitions of natural rubber, cis ‐polyisoprene, gutta‐percha, balata and synthetic trans ‐polyisoprene, and cis ‐polybutadiene have been examined by means of differential thermal analysis. Natural rubber melts over a wide range of temperature giving several transitions, the magniture and tempera…
Portable Thermoelectric Generators
<div class="htmlview paragraph">The inherent advantages of quiet operation, few moving parts, and compact and lightweight construction make thermoelectric generators desirable for powering certain specialized military equipment. Recent developments in thermoelectric materials, couple designs, and couple compartm…
464. The chemistry of cedrelone
R. Hodges, S. G. McGeachin and R. A. Raphael, J. Chem. Soc., 1963, 2515 DOI: 10.1039/JR9630002515
The Systematic Determination of Crystallographic Orientations from Three Octahedral Traces on a Plane Surface
Abstract The problem of determining the orientation of a crystal from the directions of three nonparallel traces formed by the intersection of three octahedral planes with the surface of a suitably prepared specimen has been solved completely for the first time. A full analytical treatment is presented, and it is show…
The Preparation and Electrical Properties of Bismuth Trisulfide
The direct synthesis of bismuth trisulfide was investigated by differential thermal analysis. It is demonstrated that bismuth trisulfide forms exothermically at about 285°C and melts at 760° ± 5°C. The probable reasons for the previous detonations in the preparation of this compound are elucidated. The thermoelectric…
X-RAY STUDY OF TRIDYMITE (1)
Tridymite was synthesized under various conditions with respect to starting materials and mineralizers in room pressures. Some of them, in its X-ray powder diffraction data, show the features of tridymite M and tridymite S, which were confirmed by Hill and Roy in sythetic tridymite under the hydrothermal condition, an…
RELEASE AND FIXATION OF POTASSIUM IN DIFFERENT SIZE FRACTIONS OF SOME CANADIAN SOILS AS RELATED TO THEIR MINERALOGY
The average amount of non-exchangeable potassium removed by H-resin and boiling 1 N HNO 3 from the clay in eleven Canadian soils was about twice that in the fine silt, about four times that in the medium silt, and about eleven times that in the coarse silt and sand. Continuous leaching with 0.01 N HCl also removed fou…
Corrosion and Passivity of Molybdenum-Nickel Alloys in Hydrochloric Acid
Data are presented on corrosion rates of 3–25% Mo‐Ni alloys in 10% at 25°, 70°C, and the boiling point. Data also include measurements of corrosion potentials, critical current densities for passivity, anodic polarization in the active potential region, and hydrogen overvoltage. Molybdenum‐nickel alloys, like other pa…
Studies on the Structure of Anodic Oxide Films on Aluminum, II
The apparent optical anisotropy of porous oxide films on anodized aluminum is shown to be due to variations in the inclination of the pores above different crystal orientations in the metal substrate. This variation is an additional factor which must now be included in the basic picture of the cellular structure of th…
Heats of formation of some crystalline and glassy phosphates
T. R. Meadowcroft and F. D. Richardson, Trans. Faraday Soc., 1963, 59, 1564 DOI: 10.1039/TF9635901564
Magnesium as a Passive Metal
Magnesium is normally in either the passive or transpassive state in aqueous environments. If in the transpassive state, its corrosion rate can be decreased by lowering its potential into the passive region. When high‐purity magnesium is polarized in the negative direction to the region of its reversible potential, a…
Effect of solid polymer interaction on transition temperature and diffusion coefficients
Abstract It has been shown that a nonreinforcing solid such as titanium dioxide can radically alter the glass transition temperature of the model polymer, poly(vinyl chloride–vinyl acetate) copolymer after being mechanically incorporated within it. The T g values were either higher or lower than that of the original u…
New and rare diatoms from Oregon and Washington
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Elektrische Untersuchungen an „zusatzfreien” Zinndioxydschichten hoher Elektronenkonzentration im Temperaturbereich zwischen 90 °K bis etwa 290 deg;K
Abstract Es wird über elektrische Untersuchungen an „zusatzfreien”︁ Zinndioxydschichten mit spezifischen Leitfähigkeiten zwischen 10 −1 bis etwa 3 · 10 2 Ω −1 bzw. mit Elektronenkonzentrationen zwischen 10 18 bis 2 · 10 20 cm −3 berichtet. Die Schichten wurden nach dem Gaszersetzungsverfahren hergestellt. Bei Zimmerte…
Rydberg Function as an Interatomic Potential for Metals
The Rydberg potential has been applied to a number of body-centered and face-centered cubic metals. The parameters of the potential were calculated using the experimental values for the energy of vaporization, the lattice constant, and the compressibility. Results have been obtained for the elastic constants, for the…