Materials Literature
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A method for the calculation of the energy levels of an atom in terms of the experimentally observed energy levels of ions of higher ionization is developed. This method can be applied to a system of nonequivalent electrons, as well as equivalent electrons. The notion of fractional parentage is extended to systems of…
Measurements have been made of the electrical resistivity and Hall coefficient of semiconducting rutile both in the form of ceramics and single crystals from -190\ifmmode^\circ\else\textdegree\fi{}C to +500\ifmmode^\circ\else\textdegree\fi{}C. The samples were reduced in pure hydrogen for various times and temperature…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantitative Insolubility of Thorium OxalateH. L. Kall and Louis GordonCite this: Anal. Chem. 1953, 25, 8, 1256–1258Publication Date (Print):August 1, 1953Publication History Published online1 May 2002Published inissue 1 August 1953https://pubs.acs.org/doi/10.1021/ac60080a03…
Journal Article GLASS FOR PHARMACEUTICAL PURPOSES Get access Violet Dimbleby Violet Dimbleby Department of Glass Technology, University of Sheffield Search for other works by this author on: Oxford Academic Google Scholar Journal of Pharmacy and Pharmacology, Volume 5, Issue 1, August-September 1953, Pages 969–989, ht…
The Fowler-Nordheim field emission equation permits calculation of current density $J$ as a function of surface electric field $F$ and work function $\ensuremath{\varphi}$. Computed values of $J$ for $1.00\ifmmode\times\else\texttimes\fi{}{10}^{7}<F<1.00\ifmmode\times\else\texttimes\fi{}{10}^{8}$ v/cm and for $2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical Investigations of Impurity Levels in SiliconE. Burstein, E. E. Bell, J. W. Davisson, and M. LaxCite this: J. Phys. Chem. 1953, 57, 8, 849–852Publication Date (Print):August 1, 1953Publication History Published online1 May 2002Published inissue 1 August 1953https://pu…
Abstract Second approximation methods for calculating distribution functions of mechanical relaxation times from complex dynamic data have been improved so that calculations of adequate accuracy can be made over a wider range of variables than was previously possible. Analogous methods for calculating distribution fun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow Temperature Heat Capacities of Inorganic Solids. XVIII. Heat Capacity of Ammonium Chromium Alum1Herrick L. Johnston, Jih-Heng Hu, and William S. HortonCite this: J. Am. Chem. Soc. 1953, 75, 16, 3922–3924Publication Date (Print):August 1, 1953Publication History Published…
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The surface tensions of liquid silicon and germanium were determined using the drop weight method. 600 dynes/cm was found for germanium and 720 dynes/cm for silicon at their freezing points and argon atmosphere. The parachors of the group IVb elements as derived from surface tension measurements of the molten elements…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Nickel and Copper Impurities on the Recombination of Holes and Electrons in GermaniumJ. A. Burton, G. W. Hull, F. J. Morin, and J. C. SeveriensCite this: J. Phys. Chem. 1953, 57, 8, 853–859Publication Date (Print):August 1, 1953Publication History Published online1…
Summary The growth of tin whiskers is explained as a process in which oxidation of the whisker surface develops a stress which draws out a continuing thread of metal from the main mass. A mechanism is provided by a dislocation in the main mass which travels continuously around the root of the whisker. It then follows…
The fine structure of the nuclear magnetic resonance line in solid hydrogen at low temperatures (1.15\ifmmode^\circ\else\textdegree\fi{}K) was studied experimentally using a recording meter technique. The observed line shape can be explained quantitatively by the magnetic dipole interaction of the two protons in a hyd…
The corrosion resistances of several high-strength low-alloy steels in various atmospheres, in natural waters and in soil are compared with those of structural copper steel and structural carbon steel in the same environments. The effects of the many variables that influence the corrosion of these steels in the differ…
(1953). 24—THE GENERAL CASE OF FRICTION OF A STRING ROUND A CYLINDER. Journal of the Textile Institute Transactions: Vol. 44, No. 8-9, pp. T359-T362.
In this paper the properties of knitted fabrics, which will have to be known accurately and preferably quantitatively, before the design and specification of knitted structures for specific purposes is possible, are discussed. The load-extension characteristics of plain and ribbed structures are considered together wi…
The equilibrium curve for two of the phases of CaCO3, calcite-aragonite, has been determined as a function of temperature and pressure over the range 25–80°C and several thousand kg/cm2, using the electrical conductivity of aqueous solutions of each form. Aragonite is proved to be the high pressure modification. From…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidations with Ruthenium TetroxideCarl Djerassi and Robert R. EngleCite this: J. Am. Chem. Soc. 1953, 75, 15, 3838–3840Publication Date (Print):August 1, 1953Publication History Published online1 May 2002Published inissue 1 August 1953https://pubs.acs.org/doi/10.1021/ja0111…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSegregation of Impurities During the Growth of Germanium and SiliconR. N. HallCite this: J. Phys. Chem. 1953, 57, 8, 836–839Publication Date (Print):August 1, 1953Publication History Published online1 May 2002Published inissue 1 August 1953https://pubs.acs.org/doi/10.1021/j1…
Abstract Recent experiments have indicated that the diffusion properties of a penetrant‐polymer system may change with time as diffusion proceeds. It is thought that two possible explanations of these time effects are slow changes of polymer structure accompanying diffusion and internal stresses exerted by one part of…