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  • 1995-1999  (2)
  • 1
    ISSN: 1432-2161
    Keywords: Key words Hidradenitis suppurativa ; Acne conglobata ; Arthritis ; Enthesitis ; Hands ; Calcaneus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report the case of a 48-year-old man who presented with an erosive, seronegative, HLA-B27-negative, peripheral polyarthritis, associated with hidradenitis suppurativa of axillae and buttocks. The pertinent literature is reviewed. This paper is the second devoted to this topic in a radiological journal and the first to document erosion of the posterior aspect of the calcaneus.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Small-angle x-ray scattering using a synchroton x-ray monochromatic radiation was carried out to investigate the structure of different polysaccharides in aqueous medium: carob galactomannan, κ-carrageenan in the sol and in the gel states, and κ-carrageenan-carob galactomannan mixed systems. Experiments performed on a 0.2% carob galactomannan solutions confirmed that this polysaccharide behaved as a neutral polymer in a good solvent. For K-carrageenan in the / state, either in the sodium form or in the cesium form, a maximum in the scattering curve was evidenced. Position and height of this maximum changed with K-carrageenan concentration in close agreement with what is expected for wormlike polyelectrolyte in semidilute solution. In the case of k-carrageenan in the gel state, in the cesium form, scattering curves also exhibited a maximum at an intermediate Q value. The position of this correlation peak did not change with concentration while its intensity increased. This effect was ascribed to a packing of rodlike structures by analogy with a suspension of colloidal elongated particles. This local structure could be viewed as bundles of parallel double helices. Addition of carobgalactomannan in κ-carrageenan gels induced dramatic structural changes. As the galactomannan concentration increased, the correlation peak tended to vanish. In contrast, no change in the cross-sectional radius of gyration was noticed. This phenomenon suggested a screening effect of the galactomannan, resulting in a loss of the correlation between the κ-carrageenan double helices. © 1995 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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