1,721,448 research outputs found
INFRARED SPECTRA OF GUEST MOLECULES IN CRYSTALLINE CLATHRATE HYDRATE FILMS
No full text J. E. Bertie and J. P. Devlin, J. Chem. Phys. 78. 6340 (1983). H. H. Richardson, P. J. Wooldridge and J. P. Devlin, J. Chem. Phys., 83, 4387 (1985)Author Institution: Department of Chemistry, Oklahoma State UniversityThe guest molecules in a clathrate hydrate are isolated in well-defined cages. Such systems were difficult to study spectroscopically prior to the demonstration that crystaline films of the clathrate hydrates of polar molecules can be readily deposited from the vapor . Recently, as part of a study of the mechanism of the growth of ice-like crystals at low temperatures, infrared spectra of several caged molecules have been measured. The spectra are marked by evidence of dynamical coupling between neighbour guest molecules, Evans holes (i.e., Fano antiresonances) caused by the interaction of guest and host vibrational states, and sharp variations with temperature that reflect the orientational dynamics of the engaged molecules
The Mercantile Rowing Club galop [music] /
No full textCover title.; "Played by the Albion Band at the annual regatta 1877".; "Composed and dedicated to the Mercantile Rowing Club of Sydney."; Also available online http://nla.gov.au/nla.mus-an20154137
CRYSTAL TO GLASS TRANSFORMATIONS IN SIMPLE SALT SYSTEMS
No full textG. Pollard, N. Smyrl, and J. P. Devlin, J. Phys. Chem. 76, 1826 (1972).Author Institution: Department of Chemistry, Oklahoma State UniversityIt has been shown that the glass phase of many simple salts (nitrates, chlorates, etc.) can be formed by condensing the molten salt vapors at low Admission of proportionate quantities of water vapor during the deposition of vapors permits formation of glassy solutions which crystallize at , forming a crystalline hydrate. The warming of the crystal hydrate in vacuo results in a loss of water at with the formation of the anhydrous glass, which eventually crystallizes to the stable anhydrous salt at . Spectra that are representative of the phases involved, and which provide evidence for the unusual crystal-to-glass transformation will be discussed
The Interaction of HCl and Crystalline Ice Clusters at Cryogenic Temperatures: Evidence of the Molecular Complex
No full text1. Lance Delzeit, Brad Rowland, and J. Paul Devlin; J. Phys. Chem. 97 10312 (1993). 2. B. S. Ault and G. C. Pimentel; J. Phys. Chem. 77 57 (1973). 3. A. Schriver, et. al.; J. Phys. Chem. 87 2095 (1977). 4. G. Kroes and D. C. Clary; J. Phys. Chem. 96 7079 (1992). 5. Brad Rowland, Mark Fisher, and J. Paul Devlin; J. Chem. Phys. 95 1378 (1991).Author Institution: Oklahoma State University, Stillwater, OK 74078The addition of HCl to the surface of crystalline ice clusters at cryogenic temperatures produces spectroscopic changes which can be related to the formation of the hydronium ion and the HCl acting as a molecular adsorbate. The hydronium ion is identified from its IR active modes below . Evidence for the HCl acting as a molecular adsorbate is its effect on the dangling-hydrogen (d-H) mode and the appearance of a band. Analogous spectra for with the and the show two bands relative to the one band in the region due to the interaction. The single band in the HCl system is attributed to the near overlap of the bands due to the molecular and ionic interaction of the HCl and . Reference to matrix and computational will show the plausibility of the presence of the molecular complex. Shifting of the d-H band is a common effect for molecularly adsorbed species on the surface of The shifting of the d-H to a position yet unobserved for common adsorbates gives strong evidence of the HCl acting as a molecular adsorbate
T-L SPLITTINGS FROM POLARIZED ATR SPECTRA OF UNIAXIAL CRYSTALS
No full textR. P. J. Cooney, C. Thayer, P. C. Li, and J. P. Devlin, J. Chem. Phys. 51, 302 (1969).""Author Institution: Chemistry Department, Oklahoma State University; Department of Chemistry, Oregon State UniversityOriented films of the trigonal alkali metal nitrates, which behave effectively as single crystals, can be grown in optical contact with silicon and Irtran 6 atr elements from the corresponding pure melts. Contrary to earlier spectra from such crystals are not strongly influenced by crystal distortion at the interface. Rather the unusual experimental curves, typified by a nearly complete lack of TE and TM band overlap for the mode of (II), have been found to be predictable using optical parameters generated from a damped oscillator model. Substitution of the empirically calibrated optical constants into Fresnel’s equations for the case in point (unique crystal axis perpendicular to the sample-element interface) yields nearly quantitative agreement with the experimental curves
STRUCTURES OF SALT SOLUTIONS FROM MATRIX ISOLATION SPECTRA
No full textN. Smyrl and J.P. Devlin, J. Chem. Phys. 60, 2540 (1974). Ibid., 61, 1596 (1974).""Author Institution: Department of Chemistry, Oklahoma State UniversityThe vibrational spectra of simple contact ion pairs, such as and , isolated in argon matrices have been determined in previous More recently it has been shown that the cation distortion of the anion, as indicated by the magnitude of the splittinge £or the degenerate modes is sharply decreased in glassy water and glassy ammonia This phenomenon is attributed to the electron donor action associated with the partial solvation of the metal cations by the matrix molecules. In this paper the step-wise solvation of the cations in the contact ion pairs will be displayed in the variation in magnitude of the splitting of the degenerate modes for the complete range of argon-associating matrix compositions. Certain published liquid solution spectra will be considered in view of the new contact ion pair results
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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