A progressive reduction of the observed field current below values expected from the empirical law for increasing values of the potential is attributed to space charge. The current density expected in the presence of space charge is calculated from the Fowler-Nordheim field emission theory using values of the cathode…

Graphene research and applicationsCarbon Nanotubes in CompositesDiamond and Carbon-based Materials Research

Yield points in brass crystals

G. W. Ardley、Alan Cottrell1953-09-22Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Abstract A study has been made of the yielding behaviour of single crystals of brass grown in either argon or nitrogen. Crystals of β-brass showed sharp yield points when grown in nitrogen, but not otherwise. In all β-brass crystals, plastic flow occurred jerkily, each jerk being accompanied by the formation of a grou…

Metallurgy and Material ScienceAluminum Alloy Microstructure PropertiesNanoporous metals and alloys

Auger Peaks in the Energy Spectra of Secondary Electrons from Various Materials

J. J. Lander1953-09-15Physical Review

The energy spectra of secondary electrons from carbon, beryllium, aluminum, nickel, copper, barium, platinum, and the oxides of beryllium, aluminum, nickel, copper, and barium have been measured with equipment of high stability and sensitivity. Characteristic peaks due to Auger electrons emitted as a result of absorpt…

Nuclear Physics and ApplicationsElectron and X-Ray Spectroscopy TechniquesX-ray Spectroscopy and Fluorescence Analysis

Electron-density errors at special positions

D. W. J. Cruickshank、J. S. Rollett1953-09-10Acta Crystallographica

and allowing for the correlations between bond lengths, the e.s.d's of the mean bond lengths are 0.0028 A for naphthalene and 0.0021 /~ for anthracene. The difference of the means is possibly significant for naphthalene, but, even if the theoretical mean is readjusted, it is still necessary to postulate theoretical er…

Electron and X-Ray Spectroscopy TechniquesPhotocathodes and Microchannel PlatesX-ray Spectroscopy and Fluorescence Analysis

A Device for Determining Boundaries of Browse Plots

Robert R. Rhodes1953-09-01Journal of Range Management

This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.

Engineering Technology and MethodologiesGear and Bearing Dynamics AnalysisTextile materials and evaluations

ON THE MECHANISM OF THE DISSOLUTION OF MAGNESIUM IN ACIDIC SALT SOLUTIONS: I. PHYSICAL CONTROL BY SURFACE FILMS

E. J. Casey、R. E. Bergeron1953-09-01Canadian Journal of Chemistry

A kinetic study and analysis has been made of the effects of ionic strength, acid activity, temperature, and salt type on the dissolution of magnesium in acidic salt solutions. This is an example of the simplest type of corrosion involving hydrogen evolution. The results are interpreted in terms of the effects of the…

Corrosion Behavior and Inhibition

Radioactive Charging Effects with a Dielectric Medium

P. Rappaport、Ernest G. Linder1953-09-01Journal of Applied Physics

A process is described in which radioactive radiation traverses a solid dielectric medium to charge a collector electrode. This process offers a simple method of studying effects of radiation on matter such as bombardment-induced conductivity, secondary emission, charge soakage, and radiation absorption. Typical data…

Nuclear and radioactivity studiesGraphite, nuclear technology, radiation studiesRadiation Effects in Electronics

The Surface Chemistry of Bone. VII. The Hydration Shell1

W.F. Neuman、T. Y. Toribara、B.J. Mulryan1953-09-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Surface Chemistry of Bone. VII. The Hydration Shell1W. F. Neuman, T. Y. Toribara, and B. J. MulryanCite this: J. Am. Chem. Soc. 1953, 75, 17, 4239–4242Publication Date (Print):September 1, 1953Publication History Published online1 May 2002Published inissue 1 September 19…

Calcium Carbonate Crystallization and Inhibition

Deformation of Copper Single Crystals at 300°K and 78°K

T. H. Blewitt1953-09-01Physical Review

Single crystals of copper were deformed at 78\ifmmode^\circ\else\textdegree\fi{}K and 300\ifmmode^\circ\else\textdegree\fi{}K. There was slight temperature dependence of the critical shear stress in this range of temperature and for shear strains less than about 0.25 the stress-strain relationship was linear and indep…

Magnetic Properties and ApplicationsMicrostructure and mechanical propertiesMicrostructure and Mechanical Properties of Steels

Microwave Measurements on Metallic Delay Media

S.B. Cohn1953-09-01Proceedings of the IRE

This paper presents rf index-of-refraction data for metallic delay-lens media containing square and circular obstacles. The equipment used in measuring this data is described, and the necessary correction formulas are given. The test specimens consisted of alternate layers of polyfoam spacers and thin polystyrene shee…

Microwave Engineering and WaveguidesOptical Coatings and Gratings

Synthesis and Identification of Dipropylene Glycol Isomers

A. R. Sexton、Edgar C. Britton1953-09-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Identification of Dipropylene Glycol IsomersA. R. Sexton and E. C. BrittonCite this: J. Am. Chem. Soc. 1953, 75, 17, 4357–4358Publication Date (Print):September 1, 1953Publication History Published online1 May 2002Published inissue 1 September 1953https://pubs.…

Mesoporous Materials and Catalysis

The Formation of Black Carbon

R. O. Grisdale1953-09-01Journal of Applied Physics

Electron microscopic evidence is presented in support of the hypothesis that black carbon resulting from pyrolysis of gaseous hydrocarbons is produced through the intermediate formation of droplets of complex hydrocarbons. Electron diffraction studies further confirm this hypothesis if, as has been found for particles…

Zeolite Catalysis and SynthesisCarbon Nanotubes in CompositesFiber-reinforced polymer composites

Some Dielectric Properties of Barium-Strontium Titanate Ceramics at 3000 Megacycles

Luther Davis、Lawrence G. Rubin1953-09-01Journal of Applied Physics

The dielectric constant έ/ε0 and loss tangent tanδ of barium-strontium titanate ceramics were measured as a function of temperature and static electric field at frequencies of 10 kc, 500 kc, and 3000 Mc. No frequency dependence of έ/ε0 was apparent at temperatures above the Curie point. An increase in tanδ was observe…

Microwave Dielectric Ceramics SynthesisInorganic Chemistry and MaterialsFerroelectric and Piezoelectric Materials

The Stability of the Rare Earth Complexes with Ethylenediaminetetraacetic Acid

E.J. Wheelwright、F. H. Spedding、G. Schwarzenbach1953-09-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Stability of the Rare Earth Complexes with Ethylenediaminetetraacetic AcidE. J. Wheelwright, F. H. Spedding, and G. SchwarzenbachCite this: J. Am. Chem. Soc. 1953, 75, 17, 4196–4201Publication Date (Print):September 1, 1953Publication History Published online1 May 2002Pu…

Radioactive element chemistry and processingChemical Thermodynamics and Molecular StructureLanthanide and Transition Metal Complexes