Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
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…
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…
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…
Crystallization is viewed as a kinetic process, the relative "ease" of which is influenced by details of the structures involved. The word "simplexity" is used as a measure of structural complexity. In general, high "simplexity" is synonymous with disorder, or structural simplicity, or high entropy. Nucleation and gro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrolyses of the Salts of the Perfluoro Carboxylic Acids1J. D. LaZerte, L. J. Hals, T. S. Reid, and G. H. SmithCite this: J. Am. Chem. Soc. 1953, 75, 18, 4525–4528Publication Date (Print):September 1, 1953Publication History Published online1 May 2002Published inissue 1 Sept…
The resonance frequencies of a system containing two or four magnetic sublattices with different gyro-magnetic ratios are calculated. It is found that in many cases the results reduce to the standard formulas of ferromagnetic and antiferromagnetic resonance; they are stated, however, in terms of an effective gyromagne…
A general method is given, by which problems of elastic plane strain in a bimetallic medium can be reduced to standard problems of potential theory. A bimetallic medium is one where the elastic constants are different on either side of a plane. The boundary between the two semi-infinite solids can be either a complete…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBond Energies and Polarities1Maurice L. HugginsCite this: J. Am. Chem. Soc. 1953, 75, 17, 4123–4126Publication Date (Print):September 1, 1953Publication History Published online1 May 2002Published inissue 1 September 1953https://pubs.acs.org/doi/10.1021/ja01113a001https://do…
It is shown that the unusual observed saturation behavior of the microwave electron spin resonance associated with $F$ centers in KCl, NaCl, and KBr crystals can be accounted for if the overall width is ascribed to interaction between the $F$-center electrons and the nuclear magnetic moments of the ions adjacent to th…
No disponible
No disponible
No disponible
No disponible
No disponible
No disponible
No disponible
No disponible
The scintillation process has been studied in a number of systems involving a solid solution of an organic fluor in polystyrene or polyvinyltoluene. It has been determined that direct excitation of the solute by the ionizing radiation contributes a negligible amount to the observed scintillation for the concentrations…
Phase transitions in ceramic PbHf${\mathrm{O}}_{3}$ have been studied by dielectric and structural measurements. The dielectric constant is about 90 at room temperature, and its temperature dependence shows a small anomaly at 163\ifmmode^\circ\else\textdegree\fi{}C and a pronounced peak of 540 at 215\ifmmode^\circ\els…
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…