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The problem of a uniformly moving circular surface load of a general orientation on an elastic half space for two types of load distribution, viz., “uniform” and “hemispherical,” is considered. The solutions have been obtained in integral form. The displacements on the surface of the half space, in the case in which t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic Synthesis of Lactic Acid from Acetaldehyde, Carbon Monoxide, and WaterS. K. Bhattacharyya, S. K. Palit, and A. R. DasCite this: Ind. Eng. Chem. Prod. Res. Dev. 1970, 9, 1, 92–95Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Publ…
The kinetics of burnout of natural organic matter in building clays were investigated. The results indicate that burnout occurs in two stages for extruded bodies. The temperature dependence of the reaction rate during the first stage was the same as that for the diffusivity of an O 2 /CO/CO 2 gas mixture. It is, there…
The absolute thermoelectric power S and the electrical resistivity p of polycrystalline samples were determined between 80°K and 580°K for Cr[sbnd]V alloys with up to 77 at. % V and between 300° and 750°K for Cr[sbnd]Mn alloys with up to 10 at. % Mn respectively. S of all alloys is positive. The resistivity and the th…
Recent advances in the study of microwave ferrites and garnets have resulted in a better understanding of the relationship between magnetic properties and the fundamental crystal structure. This article presents a review of the way in which the crystal structure of microwave garnets may be designed in order to realize…
The EPR spectrum of O2 impurity in solid N2 has been observed at K band and at X band. The results are consistent with the specific-heat results for this system and indicate that the Σ3 state is split in zero field by 105 ± 15 GHz. A small temperature-dependent splitting of the upper doublet is indicated by the result…
Molecular weights and grafting frequencies of graft copolymers prepared with ferrous ammonium sulfate-hydrogen peroxide initiation showed a dependence on granule swelling similar to that found with ceric ammonium nitrate (increased swelling of starch granules decreased the number of grafted polyacrylonitrile chains an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilk-Like Fiber K-6 (Chinon)S. MorimotoCite this: Ind. Eng. Chem. 1970, 62, 3, 23–32Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs.acs.org/doi/10.1021/ie50723a006https://doi.org/10.1021/ie50723a0…
Transmission electron microscopy has been used to characterize the microstructure of polycrystalline molybdenum irradiated at elevated temperatures (> 0·3T m). Irradiation at 700°c produces dislocation loops within the grains and denuded zones along grain boundaries, while irradiation at 1000°c results in generally lo…
The ND1 centre is produced in natural and synthetic diamond by primary radiation damage, but only occurs in strength when substantial concentrations of nitrogen are present in the lattice. The optical absorption associated with this centre consists of a sharp no-phonon line at 3.149 ev (80 degrees K) and phonon-assist…
Abstract The “cuticle,” which revests the starfish tube foot, has been studied by electron microscopy and the findings correlated with histochemical observations. The “cuticle” is composed by two distinct zones; an outer zone including numerous microvilli, which extend from the inner zone into and through a fibrillar…
A simple model is presented for studying the impact between a rigid sphere and a thin layer of relatively soft material supported on a rigid substrate. By assuming that the major loss of energy during impact is due to the plastic deformation of the layer, an approximate analysis is made for computing the energy loss f…
Sharp-line luminescence has been observed for ${\mathrm{Re}}^{4+}$ ($5{d}^{3}$) in single crystals of ${\mathrm{Cs}}_{2}$Zr${\mathrm{Cl}}_{6}$ and ${\mathrm{Cs}}_{2}$Hf${\mathrm{Cl}}_{6}$ at low temperature. Well-resolved vibronic structure is seen, forming nearly perfect mirror symmetry between emission and absorptio…
We present a study of the optical absorption spectrum of ErCrO3 as a function of temperature and magnetic field. Three types of processes are observed: (1) creation of a Cr+3 R-line exciton, (2) excitation of the Kramers-split Er+3 single-ion states, and (3) the simultaneous excitation of a Cr+3 exciton and a spin-fli…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoessbauer spectra of tin complexes of phthalocyanine and tetraarylporphinesMary O'Rourke and Brother Columba CurranCite this: J. Am. Chem. Soc. 1970, 92, 6, 1501–1505Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 Marc…
This paper describes the kinetics of the ceric ion-initiated graft co-polymerization of vinyl acetate-acrylonitrile to poly(vinyl alcohol). The graft copolymerization rate Rp was found to be first order with respect to the total concentration of the comonomer mixture [M], the concentration of vinyl alcohol repeating u…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFlame—Retarding Textile FibersR. C. NametzCite this: Ind. Eng. Chem. 1970, 62, 3, 41–53Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://doi.org/10.1021/ie50723a008Request reuse permissionsArticle Views4…
The trace element contaminations, introduced by grinding or sieving samples of Specpure silica and calcium carbonate in various devices in common usage, have been measured using emission spectrometry. The tungsten carbide vial introduced large amounts of Co and Ti. The alumina mortar introduced Al, Cr, Fe, Ga, and Zr.…
Residual resistivity at 4 K has been studied as a function of grain boundary area per unit volume in aluminium of two differing purities. A positive correlation between residual resistivity and boundary area was observed above a minimum boundary area per unit volume. The resistivity attributable to the presence of gra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex formation between porphyrins and metal ionsB. F. Burnham and J. J. ZuckermanCite this: J. Am. Chem. Soc. 1970, 92, 6, 1547–1550Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs.acs.org/doi/1…