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  • 1990-1994  (2)
  • Heptathela kimurai (Chelicerata)  (1)
  • volatile fatty acids  (1)
  • Ca++-ATPase
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Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Efferent fibers and daily rhabdomal changes in the anteromedial eye of the liphistiid spider, Heptathela kimurai (1993)
    Springer
    Cell & tissue research 272 (1993), S. 517-522 
    Details
    ISSN: 1432-0878
    Keywords: Retina ; Innervation ; Rhabdomeres ; Synaptoid contacts ; Heptathela kimurai (Chelicerata)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The presence of efferent fibers in the retina of liphistiid spiders, kept in natural daily cycles of illuminance, was examined by electron microscopy. The efferent fibers were observed to extend their processes through the ocellar nerve to the retina. They contained characteristic large electron-dense granules and branched repeatedly within the retina with varicosities, to provide synaptoid contacts with the receptor cells. They ran mostly among receptor cells and glial cells but sometimes protruded into receptor cells to establish invaginated synaptoid contacts. The synaptoid structures were characterized by spherical clear vesicles located at the presynaptic region, with electron-dense material adhering to the plasma membranes of the receptor cell and the efferent fiber, and a cleft about 10 nm wide formed by the two opposed parallel membranes. The clear vesicles and the electron-dense granules were secreted by exocytosis. The efferent fiber was characteristically presynaptic in relation to the receptor cell. In addition, the rhabdoms differed in size from day to night.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318558
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Fecal lactate and short bowel syndrome (1994)
    Springer
    Digestive diseases and sciences 39 (1994), S. 2315-2319 
    Details
    ISSN: 1573-2568
    Keywords: d-lactic acid ; volatile fatty acids ; short bowel syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In patients with short bowel syndrome (SBS), the carbohydrate overload to the colon may disturb the normal pattern of colonic fermentation with production ofd-lactic acid and subsequent development of a metabolicd-lactic acidosis. We measuredd-lactic acid in blood, urine, and feces, as well as the composition of fecal water and fecal reducing substances from 11 patients with SBS, comparing the results with those from normal subjects. The fecal water from patients with SBS was characterized by low pH, potassium, and volatile fatty acids, high osmotic gap, and high concentration ofl- andd-lactic acid. Five of 11 had abnormal amounts of fecal reducing substances. Fecald-lactic acid was increased in nine of 11 patients. However, none of these patients showedd-lactic acid in urine, and only one had a very low concentration in plasma. These results show thatd-lactic acid was overproduced in the colon of most of the patients with SBS. However, other factors such as absorption or impairedd-lactic acid metabolism may be necessary for a plasmatic increase ofd-lactic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02087644
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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