Materials Literature
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The oxidation of the (111) surface of crystalline UO2 through U3O7 to U3O8 has been studied by X-ray photoelectron spectroscopy and X-ray diffraction. Anisotropic growth of U3O8 revealed an epitaxial relationship between the cubic close-packed (111) plane of fluorite UO2 and the (001) basal plane of orthorhombic U3O8.…
The proportion of types I and III intramuscular collagen in longissimus muscles of Simmental bulls (n = 8) and steers (n = 8) 17 mo of age was studied. Longissimus samples taken 7 d after slaughter were evaluated for total collagen, types I and III collagen, heat-soluble collagen, sensory panel traits and Warner-Bratz…
Abstract Stoichiometric and nonstoichiometric polyion complex films were prepared from poly(sodium p ‐styrene sulfonate) and poly(diallyl dimethyl ammonium chloride). X‐ray photoelectron spectroscopy revealed that the ionic groups in the complex are more ionized than in each component polymer. Fluorescence measurement…
Abstract A systematic, experimental study was conducted on the elementary process of devolatilization (DV) and the various parameters affecting it, using a specially designed apparatus, which is devoid of the flow complexities present in industrial equipment and which permits independent control of all pertinent param…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe multiply bonded octahalodiosmate(III) anions. 2. Structure and bondingPradyot A. Agaskar, F. Albert. Cotton, Kim R. Dunbar, Larry R. Falvello, Stephen M. Tetrick, and Richard A. WaltonCite this: J. Am. Chem. Soc. 1986, 108, 16, 4850–4855Publication Date (Print):August 1,…
Abstract The depth distribution of illite/smectite (I/S) compositions was investigated for a well drilled to a depth of 3462 m on Barbados Island, the only subaerial exposure of the Barbados accretionary complex. The classical pattern of increasing percentage of illite interlayers in the mixed-layer clay with increasi…
Long-term cathodic polarization studies performed on selected marine alloys in natural seawater indicated lower than expected limiting current densities (CDs) at large electronegative potentials. The decay in the CDs appears to be related to the growth of a calcareous film that, when taken into account in modified mas…
A model of the fragmentation process is developed, based on the theory of linear elastic fracture mechanics, which predicts the average fragment size as a function of strain rate and material properties. This approach permits a unification of previous results, yielding Griffith’s solution in the low-strain-rate limit…
Thermodynamically, the oxygen potential of pure steam increases as the pressure increases. As a result, high-pressure steam can produce more highly oxidized urania than can steam at atmospheric pressure. Oxygen-to-uranium ratios as high as 2.60 can theoretically be attained in steam at 150 atm and temperatures near 16…
In-situ heating of the icosahedral phase in (Al6Mn)1−xSix, x = 0·02 and 0·04, in a Philips EM420 electron microscope leads to the formation of α(AlMnSi) and Al6Mn crystalline phases. The orientation relationship between the icosahedral phase and the α phase is found to be as suggested by Guyot and Audier, and Elser an…
The alkali metal thermoelectric converter is a direct energy conversion device, utilizing a high alkali metal activity gradient to generate electrical power. Its operation is based on the unique ion conductive properties of beta″‐alumina solid electrolyte. The major barrier to application of this device is identificat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and order parameter of a nematic lyotropic liquid crystal studied by FTIR spectroscopyY. W. Hui and M. M. LabesCite this: J. Phys. Chem. 1986, 90, 17, 4064–4067Publication Date (Print):August 1, 1986Publication History Published online1 May 2002Published inissue 1…
Abstract The reflectivity of single crystals of BaFCl is measured in the wave number range from 30 to 5000 cm −1 at room temperature using a Fourier transform infrared spectrometer. The recorded reflection spectra are evaluated by means of the classical oscillator model and the Kramers Kronig analysis in order to get…
Motivated by the recent work of Santos Lemus and Hirsch and of Pai, Yanus and Stolka on the concentration dependence of hole transport in selected molecularly doped polymers, a Monte Carlo computer study has been conducted. It predicts that transport should in principle exhibit percolative features without, however, s…
The interactions between Au and Cu across a Ni barrier layer have been studied using a wide range of Ni thickness. Above 300 °C, extensive interdiffusion between Au and Cu has been observed, with little involvement of the Ni layer. The interdiffusion between Au and Cu results in a nearly continuous change and uniform…
This paper summarizes work done to determine the minimum seam strengths re quired for clothing, in particular, Canadian Forces (CF) combat clothing, and to re- validate a recommended 80% seam efficiency. It describes a method to determine where maximum stresses occur in clothing, the locations of these stresses in wea…
The energies of defect clusters In Mn 1–x O, Fe 1–x O. Co 1–x O, and Ni 1–x ,O have been calculated using molecular orbited theory. The results indicate that (i) relatively large extended defects of a zinc blende type coordination are stable in MnO and FeO, (ii) only small defects are stable in CoO, and (iii) no defec…
Abstract Oxygen isotope ratios of <0.1- μ m smectite in bottom sediments of the Mississippi River and the Gulf of Mexico near the mouth of the river have been determined to investigate diagenesis of land-derived clay minerals during sedimentation in the sea. No difference was detected in δ 18 O (SMOW) between the r…
Abstract The refinement of the structures of rhombohedral (NH 4 ) 4 CdCl 6 , K 4 CdCl 6 , and Rb 4 CdCl 6 (K 4 CdCl 6 ‐type) and of tetragonal In 4 CdI 6 and Tl 4 CdI 6 (Tl 4 HgBr 6 ‐type) using single crystal data is reported. The discussion of the crystal chemistry of these compounds furnishes new structural relatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigher coordinate complexes. 23. Reductive coupling of isocyanide ligands in seven-coordinate molybdenum(II) mixed isocyanide bipyridine complexesSteve. Warner and Stephen J. LippardCite this: Organometallics 1986, 5, 8, 1716–1725Publication Date (Print):August 1, 1986Public…