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  • Microcasting  (1)
  • outet obstruction  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Digestive diseases and sciences 38 (1993), S. 832-836 
    ISSN: 1573-2568
    Schlagwort(e): colon ; constipation ; gastric emptying ; outet obstruction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We wished to test the hypothesis that colonic loading with fecal material leads to delayed gastric emptying. Twelve healthy male volunteers were studied. Each of these subjects went through two randomized study periods of four days. In one of these, the subjects defecated upon urge, in the other period defecation was voluntarily suppressed. Gastric emptying of a semisolid meal (mashed potatoes) was measured with the noninvasive applied potential tomography technique. On day 3 no significant changes in gastric emptying were found, but on day 4 the emptying rate had decreased from 85.8±11.0%/hr (mean±sem) to 70.3±10.9%/hr (P〈0.05) and the T50 had increased from 38.5±3.4 min to 46.2±4.0 min (P〈0.025). The duration of the lag phase (4.1±1.5 min) was not significantly altered by suppression of defecation. Our conclusion is that voluntary suppression of defecation delays gastric emptying in normal subjects. This “cologastric brake” may be involved in the pathogenesis of upper abdominal symptoms in constipated patients.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Protoplasma 196 (1997), S. 69-77 
    ISSN: 1615-6102
    Schlagwort(e): Air space ; Cell wall ; Elastomer ; Intercellular space ; Microcasting ; Mung bean
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Infiltration of the intercellular gas space is often used in physiological experimentation either to reach internal targets with various biochemical probes or to extract molecules from the apoplast. Such investigations require a good understanding of the organization and structure of the gas space system. This system was studied in the mung bean hypocotyl using different approaches, in particular internal microcasting of seedlings. Results show the presence of two continuous, more or less independent, networks, one in the cortical parenchyma, the other in the pith. The narrow tubules of one or the other network connect all cells within a tissue. Infiltration with physiological solutions does not significantly disturb living cells, at least in the short term, but opens a large field for experimental applications.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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