Materials Literature
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The mechanical behavior of polyurethane, polyoxymethylene and branched low density polyethylene is evaluated at various levels of hydrostatic pressure from atmospheric up to 6.9 Kb. Polyurethane undergoes a “ductile-brittle-ductile” transition accompanied by decreased strain hardening and also exhibits intrinsic yield…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTriboluminescence of coumarin. Fluorescence and dynamic spectral features excited by mechanical stressJeffrey I. Zink and Wolfram KlimtCite this: J. Am. Chem. Soc. 1974, 96, 14, 4690–4692Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Publi…
The first part of a collaborative survey of the linear and nonlinear optical properties of silver thiogallate, carried out by the Centre National d'Etudes des Télécommunications (Bagneux) and the Department of Electronics of the University of Southampton, is presented. A detailed study of second-harmonic generation (S…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemical control of valence. II. Behavior of the {MNO}n [metal mononitrosyl] group in ligand fieldsJohn H. Enemark and Robert D. FelthamCite this: J. Am. Chem. Soc. 1974, 96, 15, 5002–5004Publication Date (Print):July 1, 1974Publication History Published online1 May 20…
New measurements are presented on the absorption of silver thiogallate and related to fundamental mechanisms. All available data on the refractive indices of silver thiogallate, including new results for the visible, have been incorporated into sets of Sellmeier expressions. Different Sellmeier constants are given for…
By coating crystals of anthracene or coronene with a thin evaporated layer of aluminium or gold their sensitivity to electron irradiation, as judged by fading of the diffraction pattern, is reduced by a factor of three to five.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the polysulfide-thiosulfate disproportionation up to 240.deg.Werner F. GiggenbachCite this: Inorg. Chem. 1974, 13, 7, 1730–1733Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi…
In view of further determination of shielded homonuclear and heteronuclear diatomic orbitals, the problem of one electron in the field of two fixed nuclei and a cylindrically symmetric parametric potential is investigated. The simultaneous resolution of the separated equations, in prolate-spheroidal coordinates, is pe…
The characterization of several isolates of a new lactic acid bacterium which produces a malty aroma is presented. Strains MX5R, MX5S, 674S, and 628S were asporogenous, catalase-negative, gram-positive, aciduric rods of varying length which did not reduce nitrate. The above strains also formed L(+)-lactic acid, produc…
A model is developed to describe the kinetics of swelling in nuclear fuels during irradiation, when tunnels formed along grain edges by the coalescence of fission gas bubbles interlink with one another to form a network through which the entrained gas can escape to the surroundings. The predicted dependence of swellin…
The sinking rates of living and heat‐killed cells of Asterionella formosa and Tabellaria flocculosa and after treatment with CuSO 4 , NaHClO 3 , Formalin, Lugol’s solution, butanol, and isopropanol at 15°C are reported. Dead cells sank faster than living cells, particularly those of Tabellaria. Some interspecific diff…
High-pressure studies to 150 kbar have been made on four orthoferrites, on Ni${\mathrm{Fe}}_{2}$${\mathrm{O}}_{4}$, and on ${\mathrm{Fe}}_{3}$${\mathrm{O}}_{4}$ using M\"ossbauer resonance. For the last two compounds data were obtained at both 22 and 147 \ifmmode^\circ\else\textdegree\fi{}C. The major features observe…
Values of the first four ionization potentials of the lanthanides (Z=57–71) and of Hf have been compiled. All except the value for neutral Hf are based on spectroscopic data. The spectroscopic designations of the ground levels of the neutral through triply ionized atoms (Z=57–72) are also tabulated. A similar compilat…
Monte Carlo simulation procedure is developed for kilovolt electron beam scattering and energy loss in targets consisting of thin films on thick substrates. Such calculations have direct application to the nondestructive quantitative chemical analysis of ultra-thin films in the electron microprobe (an electron probe x…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonstoichiometric compositions of cobaltous oxideJae Shi. Choi and Chul Hyun. YoCite this: Inorg. Chem. 1974, 13, 7, 1720–1724Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1021/ic50…
Abstract The purpose of this study was to investigate the influence of seed crystal size on the rate of nucleation in batch stirred‐tank crystallizers. Experimental results confirm the existence of such an effect. Nucleation rate data are correlated with a second‐order polynomial in seed crystal size; coefficients of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas phase thermal decomposition of tert-butyl alcoholDavid Lewis, Mark Keil, and Michael SarrCite this: J. Am. Chem. Soc. 1974, 96, 14, 4398–4404Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.o…
The behavior of coat-substrate systems subjected to repeated impingements of liquid droplets was investigated. The systems studied consisted of a thick homogeneous substrate covered by a single layer of homogeneous coating of arbitrary thickness. Based on the uniaxial stress wave model, the variations of the stresses…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of cobalt porphyrins. II. Characterization and structure of meso-tetraphenylporphinatobis(imidazole)cobalt(III) acetate monohydrate monochloroformate, [Co(Im)2(TPP)][OAc].H2O.CHCl3Joseph W. Lauher and James A. IbersCite this: J. Am. Chem. Soc. 1974, 96, 14, 4…
With the homeotropic boundary condition, the field-induced cholesteric-to-nematic texture transition can show a large hysteresis effect such that at the same field strength either the cholesteric or the nematic texture is stable.