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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…
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…
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…
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…
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…
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…
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…
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)…
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…
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…
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 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 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…
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…
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…
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…
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/…
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…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-Ray Diffraction Studies of Systems Involved in the Preparation of Alkaline Earth Sulfide and Selenide Phosphors1William Primak, Herman Kaufman, and Roland WardCite this: J. Am. Chem. Soc. 1948, 70, 6, 2043–2046Publication Date (Print):June 1, 1948Publication History Publis…
Single crystals of BaTi${\mathrm{O}}_{3}$ have been grown and investigated by means of the polarization microscope, x-ray diffraction, and their dielectric and piezoelectric response. It has become possible to see the domains in the ferroelectric state and to change their number, size, and orientation. Wall displaceme…