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  • 2000-2004  (1)
  • 1955-1959  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Anisotropic diffraction peak broadening and dislocation substructure in hydrogen-cycled LaNi5 and substitutional derivatives (2000)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 33 (2000), S. 997-1005 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Anisotropic peak broadening in hydrogen-cycled hexagonal LaNi5 and substitutional derivatives has been studied by means of synchrotron powder diffraction. The data have been analysed by a local lattice parameter variation method implemented in a Rietveld code and by an individual profile fitting using a dislocation peak broadening model. Two main dislocation systems, both with Burgers vector 1/3〈\bar{2}110〉, are activated by misfit of the lattice parameters between the intermetallic compounds and their hydrides. Two types of diffraction peak broadening effect were observed as a function of the substitution in LaNi5: (i) a decrease or disappearance of the broadening related to the decrease of the total dislocation density and (ii) a change in the anisotropy of the broadening related to the change of the nature of the dislocation system involved. The latter effect was attributed to a change in shape of the hydride precipitates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889800004556
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence for a Hydrate of Cellulose from Studies of its Surface Properties (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1561-1562 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The water-cellulose-air contact angle was found to vary as a function of the water absorption of the cellulose, or the relative humidity of the air, as shown in Fig. 1. The numbers on the curve refer to the relative humidities with which the cellulose was in equilibrium at the various water ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1841561b0
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    Paper (German National Licenses)
    Fulltext
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