Materials Literature
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Abstract The fatigue failure of natural rubber vulcanizates undergoing repeated low tensile deformations has been investigated. It is found that below a critical deformation the life is greatly influenced by the ozone concentration in the test atmosphere. This result was anticipated theoretically from previous studies…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton Magnetic Resonance Spectra of TetracyclinesM. Schach von Wittenau and Robert K. BlackwoodCite this: J. Org. Chem. 1966, 31, 2, 613–615Publication Date (Print):February 1, 1966Publication History Published online1 May 2002Published inissue 1 February 1966https://pubs.a…
The present paper develops a nonlinear theory for the deformation of an elastic surface by assuming the existence of a strain energy function and postulating a principle of virtual work which governs its mechanical behavior. By considering the strain energy function to depend on the first- and second-order deformation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal Structure of Zr2(OH)2(SO4)3(H2O)4D. B. McWhan and Georg LundgrenCite this: Inorg. Chem. 1966, 5, 2, 284–289Publication Date (Print):February 1, 1966Publication History Published online1 May 2002Published inissue 1 February 1966https://pubs.acs.org/doi/10.1021/ic5…
The fluorescence behavior of Gd3+ and Tb3+ has been studied with the ions dissolved together in a Calibo-1 glass host. The two ions form a coupled system so that energy absorbed by Gd3+ is transferred to Tb3+ by a nonradiative mechanism and is then emitted as Tb3+ fluorescence. When Tb3+ is incorporated alone into thi…
Abstract Of nine glassy polymers so far investigated, eight yield evidence that fracture propagation involves the formation and breaking of craze material. All eight produce fracture surfaces exhibiting interference colors to one extent or another and even the colorless areas cause low angle x‐ray scattering. Ranked i…
The fine fractions of samples from a cyclothemic section in the Catskill facies, Appalachian region, have been analysed by X-ray diffraction and determinations of iron content made. All the samples contain both illite and chlorite, and some contain kaolinite. Two of the cyclothems are richer throughout in kaolinite. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Strontium-Strontium Hydride Phase System1D. T. Peterson and R. P. ColburnCite this: J. Phys. Chem. 1966, 70, 2, 468–471Publication Date (Print):February 1, 1966Publication History Published online1 May 2002Published inissue 1 February 1966https://pubs.acs.org/doi/10.1021…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of the Thermal Decomposition of Some Complex Oxalates of Iron(III) Using the Mössbauer EffectP. K. Gallagher and C. R. KurkjianCite this: Inorg. Chem. 1966, 5, 2, 214–219Publication Date (Print):February 1, 1966Publication History Published online1 May 2002Published…
Ensign, J. C. (University of Wisconsin, Madison), and R. S. Wolfe. Characterization of a small proteolytic enzyme which lyses bacterial cell walls. J. Bacteriol. 91:524-534. 1966.-An enzyme isolated from a myxobacter possesses both cell-wall lytic and proteolytic activity. The enzyme has been purified over 600-fold an…
Abstract T he objective of this paper is to present flow sheets for a system of quantitative minera-logical analysis of clays of soils and sediments and to show representative results. Selective dissolution analysis by the Na 2 S 2 O 7 -HCl-NaOH procedure yields the quartz and feldspar contents (0 to 63%) and differen…
A search was made for evidence of metastable phase separation in binary alkali metal oxide‐silica glasses which had been subjected to the usual glassmaking procedures of melting, relatively fast cooling, and annealing. Electron microscopy and electrical properties measurements were the principal tools of investigation…
Abstract The partial purification and resolution of the soluble lactose synthetase into two protein components, A and B, which individually do not exhibit any catalytic activity is discussed.
Abstract Liquid carboxyl‐terminated polybutadiene (CTPB) on aging in air increased in viscosity and molecular weight and eventually gelled. Simultaneously, the acid content decreased without formation of anhydride, the changes being a function of the hydrocarbon portion of the molecule. Cured stocks of CTPB underwent…
Abstract Approximations in the Avrami treatment of impingement which arise when the growing crystalline bodies are rods or disks are discussed, with particular reference to the single‐crystal model. This model, previously fitted to the isolated primary crystallization of polymethylene, is extended to discuss the growt…
Measurements have been carried out of the electrical conductivity of single crystals of calcium oxide from 300 to 1400°K, and of strontium oxide from 600 to 1050°K. It was measured at 1·59 kc/s for both oxides, and also with d.c. for calcium oxide. For calcium oxide the conductivity was 1 × 10 -8 ω -1 cm -1 at 1050°K…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal and Molecular Structure of Tetragonal Ruthenium DioxideF. A. Cotton and J. T. MagueCite this: Inorg. Chem. 1966, 5, 2, 317–318Publication Date (Print):February 1, 1966Publication History Published online1 May 2002Published inissue 1 February 1966https://pubs.acs.…
The theoretical mechanical behavior of a plain knitted fabric subjected to biaxial stresses is derived. An approximate mathematical model of the fabric structure was established from which the stress vs fabric-geometry and stress vs strain relationships were determined. The work was done by considering only the proper…
A method is described employing 14 CO 2 uptake by the marine centric diatom Cyclotella nana (clone 13-1) for the bioassay of vitamin B 12 in seawater. Seawater samples were filter sterilized, supplemented with sterile medium constituents, and diluted with a similarly supplemented, charcoal-treated filtered seawater. S…
Abstract Foam separation of microorganisms has been investigated with varying success by many workers, usually at high rates of gas flow. Microflotation was developed to overcome some of the disadvantages inherent in these high gas‐flow‐rate processes and is introduced in this paper as a new technique for the foam sep…