Materials Literature
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This paper describes two related instabilities of spherical bubbles that are set into pulsation by a sound field. One instability is the observed onset of erratic dancing by bubbles that are trapped in a standing wave. This instability occurs when the sound-pressure amplitude exceeds a threshold value, and we measured…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochromic spiropyrans. I. Absorption spectra and evaluation of the .pi.-electron orthogonality of the constituent halvesNorris W. Tyer Jr. and Ralph Sherman BeckerCite this: J. Am. Chem. Soc. 1970, 92, 5, 1289–1294Publication Date (Print):March 1, 1970Publication History…
Alpha alumina with additions of TiO 2 sintered more rapidly than “pure” alumina. The rate of initial sintering increased approximately exponentially with titania concentration up to a percentage beyond which the rate of sintering remained approximately constant or decreased slightly with additional titania. The concen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropoly blues. IV. Spectroscopic and magnetic properties of some reduced polytungstatesGideon M. Varga Jr., Elias Papaconstantinou, and Michael T. PopeCite this: Inorg. Chem. 1970, 9, 3, 662–667Publication Date (Print):March 1, 1970Publication History Published online1 Ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleStructure of porphyrins and metalloporphyrinsEverly B. FleischerCite this: Acc. Chem. Res. 1970, 3, 3, 105–112Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs.acs.org/doi/10.1021/ar50027a004https://doi…
Many crystals produce a diffuse scattering of X-rays which is localized in a series of relplanes. It is shown that the corresponding linear disorder in the crystal may have various origins. In silicon, the scattering is due to thermal vibrations and is well explained by the elastic properties of the crystal. In neutro…
An electron monochromator for use in an axial magnetic field is described. Electrons are injected parallel to the magnetic field and an electric field is applied in a perpendicular direction. The electrons thus describe trochoids and drift in a direction perpendicular to both the electric and magnetic fields and dispe…
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Boron 1~ and chromium 3E binding energies have been measured for 25 boron compounds and 17 chromium compounds.The data correlate linearly with calculated atomic charges.A linear correlation is also demonstrated for CNDO~calculated atomic charges and carbon 1~ binding energies determined by other workers.
The practice of regarding the thermal properties of concrete as constants may lead to serious errors in heat flow calculations. Because of the physicochemical instability of concrete it is very difficult to procure valid experimental information. In this paper theoretical considerations are presented which, together w…
Abstract Lime rates equivalent to the amount of exchangeable Al reacted primarily with the exchangeable Al and reduced the Al saturation of the effective CEC to less than 30%. Lime rates greater than the equivalent amount of exchangeable Al resulted in appreciable amounts of nonexcharigeable acidity being neutralized.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing Closure and Local Conformational Deformations of Chain MoleculesNobuhiro Go¯ and Harold A. ScheragaCite this: Macromolecules 1970, 3, 2, 178–187Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs…