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Direct reflectance measurements have been carried out on thin solid guanine films over a range of photon energies extending from 2 to 82 eV. Over this range these measurements, along with a Kramers-Kronig analysis, yield the complex refractive index n, the complex dielectric function e, and the energy loss function $-…
Colourless needles of the compound CsGaS 2 were obtained by the reaction of cesium carbonate with gallium oxide at 850°C under a stream of H 2 S. Structural investigations of (100) twinned crystals revealed an atomic arrangement isotypical with RbFeS 2 . Space group C2/c; a = 7.425(6) Å, b = 12.21(1) Å, c = 5.907(6) Å…
The red pigment uroerythrin, a chromophore known to be adsorbed by the amorphous urate sediments (sedimentum lateritium), has been isolated from human urine and further purified as its trimethyl derivative. Urine was applied to a column of Amberlite XAD-2 resin on which uroerythrin and other pigments were adsorbed. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, structure, and properties of europium ruthenium hydrideJeffery S. Thompson, Ralph O. Moyer, and Robert. LindsayCite this: Inorg. Chem. 1975, 14, 8, 1866–1869Publication Date (Print):August 1, 1975Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic exchange interactions in transition metal dimers. V. Copper(II)-diethylenetriamine complexes with oxalate, cyanate, thiocyanate, and azide inner- and outer-sphere bridging units. Electron paramagnetic resonance of alkali halide pelleted copper complexesGretchen R. H…
Abstract The spreading rate of a thin film of a liquid on the horizontal surface of an immiscible liquid substrate is calculated by an approximate quasi‐steady analysis. Spreading is assumed to be driven by the combination of gravity and interfacial forces. Dimetryl siloxane fluids of various viscosities were permitte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMacrocyclic tetradentate complex. Structure of 1,4,8,11-tetrathiacyclotetradecanenickel(II) tetrafluoroborate, Ni(TTP)(BF4)2, and electron paramagnetic resonance spectra of its copper-63-doped crystalsP. H. Davis, L. K. White, and R. L. BelfordCite this: Inorg. Chem. 1975, 1…
Changes in the a -axis and the c -axis thermal resistivity of pyrolytic graphite caused by electron irradiation at 82 K and by subsequent isochronal pulse annealing have been measured. The additive thermal resistivity at 78.5 K increases as 9.6×10 2 N 0.85 f and (7.9±0.6)×10 3 N 0.75 f cm deg/W in the a -axis and the…
In part I it was shown that if the strain energy function was expanded to a sufficient degree and the coefficients Cij were found by regression to pure homogeneous strain data, then stress–strain equations could be derived to give accurate solutions to design problems even at relatively high extensions. The problems o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of the ferrihemochrome bis(1-methylimidazole)(protoporphyrin IX)iron-methanol-waterRobert G. Little, Kenneth R. Dymock, and James A. IbersCite this: J. Am. Chem. Soc. 1975, 97, 16, 4532–4539Publication Date (Print):August 1, 1975Publication Hi…
Abstract Electron microscope microprobe analysis (EMMA) has been applied to the determination of the elemental compositions of the kaolinite particles (Mg, Al, Si, K, Ti and Fe) contained in the 0·2-0·3 µ m e.s.d., the 0·9-1·0 µ m e.s.d. and the 1·9-2·0 µ m e.s.d. fractions of an English kaolin and an American kaolin.…
Recent progress in the techniques of manufacture of spectroscopic diffraction gratings is described. Three main topics are discussed in detail; (i) the mechanical ruling of gratings, and the way in which the mechanical aspects of the ruling process affect the spectroscopic performance of the grating; (ii) the developm…
The Affiliate Plan, established by the IEEE Board of Directors, enables individuals who are not members of the IEEE, but who have an interest in the field of plasma science, to join the IEEE Nuclear and Plasma Sciences Society. Admission as an affiliate requires only membership in a professional society listed here. A…
The magnetic structure of Mn 3 Si (bcc Fe 3 Al type crystal structure) at low temperatures has been determined by neutron diffraction using single crystal samples. It is found that Mn 3 Si has a helical spin structure (Néel temperature 25.8 K) with a wave vector q parallel to one of <111> directions and of magnitude 0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConcentration Profiles in Ternary Gaseous DiffusionR. Carty and T. SchrodtCite this: Ind. Eng. Chem. Fundamen. 1975, 14, 3, 276–278Publication Date (Print):August 1, 1975Publication History Published online1 May 2002Published inissue 1 August 1975https://pubs.acs.org/doi/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel synthesis of longifoleneRobert A. Volkmann, Glenn C. Andrews, and William S. JohnsonCite this: J. Am. Chem. Soc. 1975, 97, 16, 4777–4779Publication Date (Print):August 1, 1975Publication History Published online1 May 2002Published inissue 1 August 1975https://doi.org/1…
The dissociation energy of gaseous ZrO, D0° (ZrO), and the heat of atomization of gaseous ZrO2 have been measured using a high temperature mass spectrometer. A number of equilibria were studied and the following results were derived: ΔfH (ZrO,g,298.15 K) =83±12 kJ/mol, D0° (ZrO) =761±15 kJ/mol) (or 7.89±0.15 eV), ΔfH…
Abstract not Available.
An empirical model has been developed to relate molecular weight distribution to the shear dependence of the steady shear viscosity in high-density polyethylene melts. It uses a molecular weight, Mc, which partitions molecular weights into two classes; those below Mc contribute to the viscosity as they do at zero shea…
Sputter-deposited high-purity copper specimens with grain sizes from 8.4 to 0.056 μm were tested in tension to investigate the influence of grain size on yield strength for small grain sizes. The smallest grain size in the sputter-deposited copper was a factor of 40 smaller than the smallest grain size previously avai…