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  • 1
    Electronic Resource
    Electronic Resource
    The spatial distribution of cations in nematocytes of Hydra vulgaris (1991)
    Springer
    Hydrobiologia 216-217 (1991), S. 661-669 
    Details
    ISSN: 1573-5117
    Keywords: Hydra vulgaris ; nematocysts ; potassium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The spatial distribution of cations was assayed qualitatively and quantitatively in tentacular nematocytes of Hydra vulgaris in a scanning transmission electron microscope by means of x-ray microanalysis performed on 100 nm thick freeze-dried cryosections. The matrix of undischarged cysts (stenoteles, desmonemes and isorhizas) was found to contain mainly K+. In isolated nematocysts of Hydra the intracapsular potassium can be readily substituted by practically any other mono- and divalent cation (Na+, NH4 +, Mn2+, Co2+, Mg2+, Ca2+, Fe2+) all, except Fe2+, without impairing the ability of the cyst to respond to the chemical triggering with dithioerythritol or proteases. Monovalent cations increase the osmotically generated intracapsular pressure compared to divalent ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026528
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Association between gastrointestinal tract carriage ofCandida, blood group O, and nonsecretion of blood group antigens in patients with peptic ulcer (1993)
    Springer
    Digestive diseases and sciences 38 (1993), S. 1453-1458 
    Details
    ISSN: 1573-2568
    Keywords: peptic ulcer disease ; Candida ; ABO blood groups ; nonsecretors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Of 112 patients with peptic ulcer disease examined for oral carriage ofCandida, 66 (59%) were carriers.Candida carriage was associated with blood group O (P〈0.05) and, independently, with nonsecretion of blood group antigens (P〈0.01). For each subject, the presence or absence of yeasts was found to be a constant characteristic, and only among patients positive forCandida was blood group O or nonsecretion more frequent than expected in the general population. The quantity of yeasts isolated was significantly greater in patients than in normal subjects (P〈0.002), as was the frequency of carriage in the patient population (59% vs 32%). This increase was not associated with treatment with H2-receptor antagonists. The results of paired oral and gastroduodenal aspirate cultures suggested that identifyingCandida in the oral cavity was a good indicator of the presence of yeasts elsewhere in the gastrointestinal tract. Mechanisms whereby overgrowth ofCandida in the upper gastrointestinal tract might contribute to the inflammatory background of peptic ulcer disease are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01308603
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    Paper (German National Licenses)
    Fulltext
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