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  • Key words.Campylobacter; chick; intestine; mucin; xylanase.  (1)
  • PACS. 61.48.+c Fullerenes and fullerene-related materials – 81.05.Tp Fullerenes and related materials – 61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling – 81.07.Bc Nanocrystalline materials – 81.15.Fg Laser deposition  (1)
  • 2000-2004  (2)
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Keywords
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  • 2000-2004  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Evidence for a solid phase of dodecahedral C 20 (2003)
    Springer
    The European physical journal 31 (2003), S. 509-515 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 61.48.+c Fullerenes and fullerene-related materials – 81.05.Tp Fullerenes and related materials – 61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling – 81.07.Bc Nanocrystalline materials – 81.15.Fg Laser deposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Evidence is presented for the formation of a solid phase based on the smallest fullerene, C20, in thin diamond-like carbon films deposited by ultraviolet laser ablation from diamond onto nickel substrates at room temperature in the presence of 10-4 torr of cyclohexane or benzene. Laser desorption mass spectrometry from the films shows the presence of C20, C21 and C22 species, while micro-Raman spectroscopy and electron diffraction from selected particles together with first principle density-functional calculations, indicate a cubic solid with dodecahedral C20 cages as building blocks. Unlike solid C60 and fully protonated C20, which are bound by van der Waals forces, the proposed structure is stabilized by linking of the C20 dodecahedra with bridging carbon atoms at interstitial tetrahedral sites to form a face-centered-cubic lattice with 22 carbon atoms per unit cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00060-4
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  • 2
    Electronic Resource
    Electronic Resource
    Diet influences the colonisation of Campylobacter jejuni and distribution of mucin carbohydrates in the chick intestinal tract (2000)
    Springer
    Cellular and molecular life sciences 57 (2000), S. 1793-1801 
    Details
    ISSN: 1420-9071
    Keywords: Key words.Campylobacter; chick; intestine; mucin; xylanase.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The objectives of this study were to evaluate the effect of diet on the colonisation by Campylobacter jejuni of the chick caeca, and to determine whether the viscosity of the intestinal contents and mucin carbohydrates were altered by the diet. The diets investigated were maize based, wheat based or wheat-based supplemented with xylanase. The xylanase-supplemented diet reduced the viscosity and lowered the numbers of Camp. jejuni. Feeding the enzyme-supplemented diet increased the amount of neutral and sulphated mucins in the goblet cells of the small and large intestines and caecum. An abundance of sulphated and carboxylated mucins was seen in the surface goblet cells of the large intestine with the maize- and wheat-based diets. Both the diet supplemented with xylanase and the maize diets increased crypt-surface glycosylation of the sialic acid residues. The analysed data from the combined sites showed significant differences in the amount of neutral and acidic mucins when comparing the wheat and the wheat plus xylanase diets. However, no changes were shown in the staining intensity of sulphated mucins between the three diets. Significant differences in the glycosylation of sialic acid and in the N-acetylglucosamine residues were shown between dietary groups. These results provide evidence that the wheat diet supplemented with xylanase leads to greater changes in the mucin composition and carbohydrate expression of goblet cell glycoconjugates, which are associated with a reduction in intestinal viscosity and decreased numbers of Camp. jejuni.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00000659
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