Materials Literature
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The processes of precipitation in Cu-Cr binary alloys with 0.05∼0.91 wt%Cr have been investigated by electrical resistivity, hardness and transmission electron microscopy, with the following results: (1) Increase in electrical resistivity due to clustering of solute atoms or zone formation is not detected at above/300…
The study of the clay minerals in the Tchad solodized solonetzes and in the associated vertisols has been realized by X-ray diffraction analysis. The neoformation, stability and weathering of the montmorillonites characterizing these soils are herein described.
The relationship between the geometrical structures of plain-woven filament fabrics and the directional effect of fabric-on-fabric static friction has been investigated with the following results:(1) Frictional force F per unit area for every relative direction of rubbing is related to pressure N by the relation F=kNn…
A resistance heated crystal puller has been used to grow crystals of NbO, Ti2O3, and Al2O3, which have melting points of 1945, 2000, and 2050°C, respectively. The puller incorporates a modified version of a tantalum tube furnace described previously, which is capable of operating in oxidizing, neutral, and reducing at…
The roots of Cynanchum wilfordi HEMSLEY were found to contain a glycoside mixture. The glycosides showed a positive Keller-Kiliani reaction, suggesting the presence of a 2-deoxysugar. The sugar portion of the glycoside was found to be D-cymarose. The aglycone was shown to be an ester. Alkaline hydrolysis of the ester…
The serrated yielding exhibited by metals during tension tests at temperatures near absolute zero is the principal consideration of this paper. Stress-strain curves are presented for various metals including Armco iron, “K” Monel, and titanium at temperatures from +200 to −269 C. The variations of yield stress and duc…
Abstract A new Eu 3 O 4 preparation method is described. Eu 3 O 4 is produced by the solid state reaction between Eu and Eu 2 O 3 . Static magnetic susceptibility measurements were made by the Faraday method from 6 to 300°K. Eu 3 O 4 was found to be ferrimagnetic with a Curie point of 77 °K.
The so-called thermodynamic paradox associated with a ferrite-loaded rectangular waveguide is discussed. It is shown that the various structures introduced by some authors to resolve the paradox are, even in the limit case, different structures from the original one leading to the paradox, and therefore they do not he…
Abstract It is frequently stated that soils with well‐developed A and B horizons are sufficiently weathered that their clays will reflect strongly the influence of the climatic environment. Studies of three profiles developed from sedimentary rock materials in northern Utah show a high association between parent mater…
Abstract
The plastic deformation of type II diamond plates has been examined by three-point loading at temperatures between 1700 and 1550°c. Plastic bending was produced at 1700°c but the degree of bending at a particular stress was less than with experiments at 1800°c which have been reported. No plastic deformation was detec…
The semiconductivity and photoconductivity of the solid free radicals galvinoxyl (2,6-di-tert-butyl-α(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene) p-tolyloxy radical) and DPPH (α,α-diphenyl-β-picryl hydrazyl) and related compounds have been examined. Their behaviour is similar to that of diamagnetic poly-cycli…
Matthew H. Hohn, Joan Hellerman, New Diatoms from the Lewes-Rehoboth Canal, Delaware and Chesapeake Bay Area of Baltimore, Maryland, Transactions of the American Microscopical Society, Vol. 85, No. 1 (Jan., 1966), pp. 115-130
Abstract Des mesures du temps de retournement en régime impulsionnel ont été faites et mettent en évidence, à faibles champs, un retournement en deux temps. D'autre part, de nouvelles mesures du champ coercitif sont également présentées.
The prediction of ligand-field theory that for low-spin octahedral complexes the size should decrease along the series Cr(III), Mn(III), Fe(III), and Co(III) has been examined by comparing the lattice constants of the complex cyanides of formula K3MIII(CN)6; a steady decrease along the series provides substantial evid…
La liberté d’orientation dans trois dérivés hexasubstitués du benzène, le pentaehlorotoluène (PCT), le tétrachloroparaxvlène (TCPX) et le pentaehlorobenzène thiol (PCBT), a été étudiée par résonance magnétique nucléaire de — 175 °C à + 50 °C et, pour le PCBT seulement, par des mesures diélectriques de — 90 °C à +50 °C…
R. L. N. Harris, A. W. Johnson and I. T. Kay, Q. Rev. Chem. Soc., 1966, 20, 211 DOI: 10.1039/QR9662000211
Abstract Audio frequency dielectric constant data versus temperature data for poly(vinyl chloride) exhibit a high temperature (glass) transition which becomes steeper and reaches higher values as the frequency is reduced. The same trend is demonstrated for a series of chlorinated poly(vinyl chlorides) although the tra…
The study of inert-gas behaviour with respect to metals has a history almost as long as that of the inert gases themselves, reference to the permeation of helium through a number of metals having been made in 1897, less than two years after the isolation of the new element.
X-Irradiation of single crystals of carboxymethyltriphenylphosphonium chloride produces the corresponding oriented phosphorane radical-cation Ph3[graphic omitted]ĊH·CO2H. The spectrum has been analysed to yield the hyperfine coupling tensors of the 1H and 31P nuclei and the g-tensor. These values are discussed in term…