Materials Literature
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The heat capacity of thorium dioxide was determined from 10 to 305°K in an adiabatic calorimeter. As expected, no anomaly was observed in the heat capacity. The enthalpy, entropy, and free energy were calculated from the heat-capacity data and are tabulated for several temperatures. At 298.16°K the entropy and the ent…
The specific heat of high-purity Acheson graphite prepared by the National Carbon Company has been measured from 13° to 300°K. In the region 13° to 54°K the Cp data follows a T2 dependence quite accurately in agreement with previous experimental work and recent theoretical investigations of specific heat in strongly a…
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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…
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…
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…
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…
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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…
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…
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…
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…
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…