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  • Wiley-Blackwell  (8,274)
  • International Union of Crystallography (IUCr)  (1,369)
  • 1990-1994
  • 1975-1979  (9,643)
  • 1979  (9,643)
Collection
Keywords
Publisher
Years
  • 1990-1994
  • 1975-1979  (9,643)
Year
  • 1
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    Habitat Selection and Distribution Patterns of Five Species of the Amphipod Genus Gammarus (1979)
    Wiley-Blackwell
    In:  Oikos, 33 (2). pp. 316-322.
    Details
    Publication Date: 2015-10-06
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 2
    Electronic Resource
    Electronic Resource
    Curve analysis of small-angle scattering by triaxial body models using a graphic display device (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 628-628 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: An interactive program using a graphic display device for the analysis of small-angle scattering has been developed. It includes the curve fitting of experimental data to theoretical results calculated through a triaxial body approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879013510
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Computer program for radial distribution analysis of X-ray, neutron and electron diffraction data (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 634-635 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A rapidly converging radial distribution least-squares program (RADILS) is available for the analysis of X-ray, neutron and electron diffraction data from liquid and amorphous materials. The program automatically generates a radial distribution function, G(r), essentially free from termination effects and determines the empirical background scale and shape, absolute scale factor, bulk density and coordination numbers, disorder parameters and interatomic distances for the first few highly ordered distances in the sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879013534
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A search–match system for X-ray powder diffraction data (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 629-634 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A computer program which can identify the crystalline component phases of a mixture from its X-ray diffraction pattern is described. The program uses the data base of powder diffraction patterns maintained by the Joint Committee on Powder Diffraction Standards. The `reverse searching' technique employed permits the identification of each component and provides an estimate of confidence in the identification. Errors in measured spacings and intensities are tolerated by the program. The interactive search-match system is available for general use via a networked timeshared computer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879013522
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    X-ray beam polarization measurements (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 25-26 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A simple modification of the jig proposed by the IUCr Commission on Crystallographic Apparatus for the measurement of polarization ratios for X-rays allowing the full rotation of the detector arm permits cancellation of the first-order errors by averaging pairs of measurements differing by 180° around the rotation axis of the detector arm. The plot of Imeas as a function of cos2 Φ, where Φ is the angle between the detector arm and one of the principal directions of polarization in the beam gives a reliable value of the polarization ratio K. The experimental results are: Mo Kα 0.969 ± 3, 0.970 ± 3; Cu Kα 0.908 ± 5, 0.897 ± 5 for a 0.42° and a 0.60° FWHM graphite monochromator respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879011705
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  • 6
    Electronic Resource
    Electronic Resource
    X-ray diffraction study of MgCl2 aqueous solutions (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 34-38 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: X-ray diffraction data for three aqueous solutions of MgCl2 were analyzed. It is shown that in a very concentrated solution the structure and correlation functions can be reproduced almost completely by using a nearest-neighbor model of ionic hydration, whereas in the more dilute solutions a certain number of interactions between the hydrated cation and external water molecules must also be considered. The mean coordination geometry for the close hydration was found to be octahedral both for cation and anion with mean cation–water distances (2.10–2.12 Å) and mean anion–water distances (3.11–3.14 Å) in accordance with results found in other cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879011729
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  • 7
    Electronic Resource
    Electronic Resource
    Microfibril dimensions from small-angle X-ray scattering (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 27-33 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Model calculation based on parallel cylindrical fibrils with a distribution of radii are used to derive fibrillar radii obtained from the transverse intensity profile of the small-angle X-ray scattering (SAXS) peaks. The results are expressed in terms of moments of the distribution function of the radii. The traverse integral breadth of the peak leads to ({\bar R^4}/{\bar R^3}), the initial slope gives ({\bar R^6}/{\bar R^4})1/2, the asymptotic slope in the transverse wings yields {\bar R^2} or ({\bar R^4}/{\bar R^2})1/2 and the analysis of the characteristic function gives ({\bar R^2}/{\bar R^1}). The first two methods are applied to the SAXS patterns of well oriented samples of nylon 6, for which it is found that a positively skewed distribution of fibrillar radii. The relation between these analyses of uniaxially oriented systems and other SAXS and wide-angle diffraction methods is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879011717
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  • 8
    Electronic Resource
    Electronic Resource
    Dépouillement par ordinateur des clichés de diffraction obtenus par la méthode de Laue (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 39-41 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A computation method is presented which allows a rapid indexing of any unknown spot pattern obtained by back-reflection or transmission Laue methods. The Cartesian coordinates of n spots are measured in an orthonormal frame referred to the photographic film. Two spots 1 and 2 separated by a wide angular distance αm are carefully chosen. Their indices are assumed to be less than 5. The set (E) of all the pairs of planes (h1k1l1) and (h2k2l2) making an angle α close to αm is then computed. Since the pair of reflecting planes related to spots 1 and 2 belongs to (E), each computed pair of planes is tried, in order to determine the orientation of the crystal and to check whether the coordinates of the (n−2) other spots can be matched to dense planes of indices less than 8. If the uncertainty of the measurements is high or if n is too low, this method gives the possible orientations for the crystal. Plane indices less than 8 have been identified in cubic, tetragonal and orthorhombic crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879011730
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  • 9
    Electronic Resource
    Electronic Resource
    Lattice parameters and birefringence in PbTiO3 single crystals (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 49-53 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Measurements of lattice parameters and birefringence of PbTiO3 single crystals are described as a function of temperature. The anomalous rise in birefringence with temperature is interpreted in terms of lattice strain and dielectric polarization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879011754
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  • 10
    Electronic Resource
    Electronic Resource
    Détermination de l'intensité intégrée en step-scanning (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 12 (1979), S. 116-118 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A process giving the limits of a peak measured by the step-scan method is described. This calculation is based on the research of the minimum of a convolution of the intensity. It is found on theoretical peaks (Gaussian and Lorentzian) that this algorithm gives less unbiased estimation of the integrated intensity than the one described previously by Lehmann & Larsen [Acta Cryst. (1974), A30, 580–584].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889879011894
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