Atomic Energy Research Establishment
Recently a number of authors have discussed the theory of critical phenomena in magnetic ma-terials and produced results differing from the con-ventional and simple theory as described in many
Materials Literature
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On the calculation of surface tension from measurements of pendant drops
Abstract The calculations presented are an extension of the work of Bashforth & Adams (1883) to give the shapes of pendant drops of liquids for values of β from — 0.25 to — 0.6 at intervals of 0.025. The results have been used to calculate, to an accuracy of 0.001 to 0.01 %, the constants needed for measuring surf…
The theory of the vibrations and the Raman spectrum of the diamond lattice
Abstract The crystal structure of diamond was first determined by Bragg in 1913 from X-ray photographs; the carbon atoms are arranged at the apices and median points of interlinked tetrahedra. Born (1914) derived expressions for the three elastic constants of diamond in terms of two force constants related to the vale…
Untersuchungen im System CaOP2O5SiO2
Abstract Die Gleichgewichte im kalkreichen Teil des Systems CaOP 2 O 5 SiO 2 wurden thermisch, röntgenographisch und mikroskopisch untersucht. Im binären Randsystem CaO 2 O 5 schmilzt die Verbindung 4 CaO · P 2 O 5 unter Abspaltung von CaO. Der Schnitt 2 CaO · SiO 2 3 CaO · P 2 O 5 ist dadurch gekennzeichnet, daß…
Alpha- and, Beta-Hydroxyls of Glycerol in Preparation of Alkyd Resins
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlpha- and, Beta-Hydroxyls of Glycerol in Preparation of Alkyd ResinsHenry A. GoldsmithCite this: Ind. Eng. Chem. 1948, 40, 7, 1205–1211Publication Date (Print):July 1, 1948Publication History Published online1 May 2002Published inissue 1 July 1948https://pubs.acs.org/doi/10…
Isomerization of Certain Olefins by Silica Gel at Room Temperature
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomerization of Certain Olefins by Silica Gel at Room TemperatureW. S. Gallaway and M. J. MurrayCite this: J. Am. Chem. Soc. 1948, 70, 7, 2584–2586Publication Date (Print):July 1, 1948Publication History Published online1 May 2002Published inissue 1 July 1948https://pubs.ac…
Transference Numbers and Hydration of Some Quaternary Ammonium Salts1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransference Numbers and Hydration of Some Quaternary Ammonium Salts1Cecil H. Hale and Thomas de VriesCite this: J. Am. Chem. Soc. 1948, 70, 7, 2473–2475Publication Date (Print):July 1, 1948Publication History Published online1 May 2002Published inissue 1 July 1948https://pu…
A statistical theory of cascade multiplication
The secondary emission electron multiplier is chosen to illustrate the phenomenon of ‘cascade multiplication’. A method is given for deriving the semi-invariants of the probability distribution for the number of output electrons after any number of identical stages of multiplication, in terms of the corresponding semi…
Differential Heats of Adsorption of Nitrogen on Carbon Blacks
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDifferential Heats of Adsorption of Nitrogen on Carbon BlacksL. G. Joyner and P. H. EmmettCite this: J. Am. Chem. Soc. 1948, 70, 7, 2353–2359Publication Date (Print):July 1, 1948Publication History Published online1 May 2002Published inissue 1 July 1948https://pubs.acs.org/d…
Cathodic Protection of Steel in Sea Water With Magnesium Anodes
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation R. A. Humble; Cathodic Protection of Steel in Sea Water With Magnesium Anodes. CORROSION 1 July 1948; 4 (7)…
EFFECT OF HEAT‐TREATMENT ON THE DENSITY AND CONSTITUTION OF HIGH‐SILICA GLASSES OF THE BOROSILICATE TYPE*
A bstract Some evidence leading to the supposition that certain borosilicate glasses containing a high percentage of silica are made up of two‐component glasses is presented. One of these components, which consists mainly of silica and has a low expansivity, forms a rigid network throughout the body of the glass while…
Über die Trägheit der Wände zwischen Weißschen Bezirken
Abstract Da das magnetische Moment der Elektronen mit einem mechanischen Drehimpuls verknüpft ist, muß die Verteilung der Magnetisierungsvektoren in einer bewegten Wand zwischen zwei Weißschen Bezirken sich von derjenigen in der gleichen Wand in Ruhe etwas unterscheiden. Der Energieinhalt der bewegten Wand ist deshalb…
Mechanical Properties of NaCl, KBr, KCl
The pulse method has been applied to measure mechanical properties of NaCl, KBr, and KCl at 10 and 30 Mc/sec. The elastic constants of KBr have been measured in the low temperature region. The strain-optical constants have been measured by a traveling-wave method suggested by Mueller.
The Thermionic Properties of Chromium
The spectral emissivity, the temperature scale, and the electron work function of chromium have been determined. The emissivity is found to be 0.334 for a wave-length of 6690A and the value found for the electron work function is 4.60 volts with an $A$ for Richardson's equation of 48 amp/${\mathrm{cm}}^{2}$/${\mathit{…
The Rate of Evaporation of Water through Duplex Films
The stability of duplex films of hydrocarbon oils containing spreaders is discussed in this paper. Duplex films containing spreaders of high molecular weight and of complex nature, e.g. stand oil, eucalyptus residue, polymerized oleic acid, may remain spread for long periods but are thermodynamically metastable. The p…
Problem Types in the Theory of Perfectly Plastic Materials
Typical problems of the theory of perfectly plastic materials are discussed for the example given by the structure shown in Fig. 1. A simple graphical representation is developed which facilitates the study of the states of and residual produced by slowly varying the load. For monotonically increasing load, three doma…
CALCIFICATION IN MARINE MOLLUSCS
1. Various aspects of the process of calcification have been studied in several marine molluscs. 2. Calcification of the shell is brought about by the formation of an organic matrix upon which minute granules of calcium phosphate are deposited. 3. In the presence of, and in contact with the mantle epithelium, crystal…
Mechanical Properties of Substances of High Molecular Weight. IV. Rigidities of Gelatin Gels; Dependence on Concentration, Temperature and Molecular Weight1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanical Properties of Substances of High Molecular Weight. IV. Rigidities of Gelatin Gels; Dependence on Concentration, Temperature and Molecular Weight1John D. FerryCite this: J. Am. Chem. Soc. 1948, 70, 6, 2244–2249Publication Date (Print):June 1, 1948Publication Histor…
Double Fluorides of Potassium or Sodium with Uranium, Thorium or Lanthanum
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDouble Fluorides of Potassium or Sodium with Uranium, Thorium or LanthanumW. H. ZachariasenCite this: J. Am. Chem. Soc. 1948, 70, 6, 2147–2151Publication Date (Print):June 1, 1948Publication History Published online1 May 2002Published inissue 1 June 1948https://pubs.acs.org/…
The solubility of sodium and potassium soaps and the phase diagrams of aqueous potassium soaps
Summary Solubility data are provided and collected for the pure sodium and potassium soaps. Hydrolysis obscures the temperatures of solution but is obviated by the presence of a small excess of alkali. Each sodium soap has a large range of temperature between fair and high solubility, whereas the potassium soaps go ab…