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Abstract A survey is given of the existing methods for measuring the surface tension from the geometry of sessile drops. These methods, which generally consist of the measurement of simple drop dimensions, are insufficiently accurate for use with adsorption studies. A new procedure is described to find the surface ten…
Oxide films formed at room temperature on iron single crystals and poly‐crystals have been investigated by electron diffraction and electrochemical methods. The structure of the oxide is found to vary from an Fe 3 O 4 type material at the metal/oxide interface to a γ ‐ Fe 2 O 3 type material at the oxide/gas interface…
D. M. Adams, J. Chatt, R. G. Guy and N. Sheppard, J. Chem. Soc., 1961, 738 DOI: 10.1039/JR9610000738
Strontium orthophosphate undergoes a rapid, reversible transition at 1305°C. The high‐temperature β form of pure Sr 3 ( PO 4 ) 2 cannot be quenched to room temperature, even with extremely rapid cooling. Determination of phase relationships on the orthophosphate joins between Sr 3 ( PO 4 ) 2 and each of the three orth…
Alloying chromium with small amounts of platinum, palladium, iridium, rhodium, ruthenium, or osmium markedly improves its corrosion resistance to nonoxidizing acids such as sulfuric or hydrochloric acid. The presence of rhodium, palladium, or osmium has little influence on the resistance of chromium to an oxidizing ac…
L'effet global des processus d'absorption et d'émission de photons de résonance optique sur l'état fondamental d'un ensemble d'atomes est étudié à partir d'équations d'évolution établies précédemment. On met ces équations sous une forme plus simple grâce à une « approximation séculaire», toujours valable dans les cas…
The behaviour of metal‐free phthalocyanine‐tetrasulfonate and some metal derivatives in aqueous solution has been investigated. It was found that most of these compounds dimerize in diluted aqueous solution. The stabilities of these dimers have been determined by spectrophotometric measurements.
M. Whalley, J. Chem. Soc., 1961, 866 DOI: 10.1039/JR9610000866
Une étude par diffraction de neutrons a montré que la structure de MnAu 2, quadratique centrée, peut être considérée comme un empilement, normalement à l'axe c, de feuillets de manganèse séparés par deux feuillets d'or. MnAu2 est d'autre part un hélimagnétique : tous les atomes de manganèse d'un même feuillet ont leur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSn1 Nuclear Magnetic Resonance Spectra1John J. Burke and Paul C. LauterburCite this: J. Am. Chem. Soc. 1961, 83, 2, 326–331Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 January 1961https://pubs.acs.org/doi/10.1021/j…
The kinetics of the dissolution of iron in sulfuric acid was investigated by polarizaton measurements in the presence of iodide ions or carbon monoxide as an inhibitor. The measurements included an oscillographic study of transient phenomena as well as steady states. The adsorption of iodide ions on iron was measured…
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Several species of blue-green algae were studied in thin sections with the electron microscope. Our electron micrographs confirm the view that the cell of blue-green algae is different and simpler in organization than the typical plant or animal cell. On the other hand, the general pattern of ultrastructure is the sam…
J. Lewis, R. S. Nyholm and P. W. Smith, J. Chem. Soc., 1961, 4590 DOI: 10.1039/JR9610004590
The abnormal intensity of some `forbidden' hyperfine transitions in the paramagnetic resonance spectra of ions with S = 1 or more is shown to be due to cross terms in the spin Hamiltonian. These arise from off-diagonal terms in the electronic and nuclear interactions, and the computed transition intensities agree clos…
The Hartree-Fock method is discussed with emphasis placed on the transformation properties of the Hartree-Fock equation. It is emphasized that the Hartree-Fock equation may be solved in terms of non-orthogonal one-electron functions, and that in some cases it may be more convenient to choose such solutions. Equations…
The laws governing thermal radiation are briefly reviewed and methods of measuring emissivity are described. The apparatus used by the author is described and an account of possible sources of error is given. Results of other workers are quoted wherever available, and the thermal emissivity over the useful working tem…
Studies were made of the influence of humidity on the breakdown voltage of gaps in air. The voltages were measured for gaps between uniform-field electrodes and between spheres. The sphere-gaps comprised 2, 6.25, 12.5 and 25cm-diameter spheres which were enclosed in an air-tight chamber in which the humidity was varie…
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In the second part of this article, concluded from the October issue of ‘Platinum Metals Review’, a short account is given of changes in the physical properties of palladium following absorption of hydrogen. The behaviour of certain palladium alloys is compared with that of palladium and alternative methods of approac…