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  • Articles: DFG German National Licenses  (2)
  • 1980-1984  (2)
  • Rezidivulcus  (1)
  • carrier-mediated ion transport  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Carrier-mediated ion transport through black membranes of lipid mixtures and its coupling to Ca++-induced phase separation (1982)
    Springer
    The journal of membrane biology 70 (1982), S. 147-155 
    Details
    ISSN: 1432-1424
    Keywords: black lipid membranes ; carrier-mediated ion transport ; lipid mixture ; Ca++-induced phase separation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Voltage jump-current relaxation experiments have been performed with valinomycin-doped membranes of mixtures of 1,2-dipentadecylmethylidene-glycero-3-phosphorylcholine (PC) and charged-phosphatidic acid (PA). Both relaxation processes predicted by a simple carrier model could be resolved which allowed the calculation of the rate constants of the Rb+ transport. The dependence of the rate constants on the membrane composition indicates that (i) the lipids in the mixed membranes are homogeneously distributed and that (ii) no major difference exists between the composition of the membrane and that of the torus. The analysis of the stationary conductance data, however, shows that the valinomycin content of the mixed membranes depends strongly on their lipid composition. Addition of Ca++ ions to a 1∶1 mixture induces a phase separation into PA domains of very low conductivity and PC-enriched regions of high conductivity. Half saturation is reached atc ca=5×10−4 m. At 10−2 m Ca++ in the aqueous phase, the rate constants clearly indicate that all PA molecules are electrically “passivated” and only pure PC domains contribute to the membrane current. A detailed picture is thus derived of the coupling of a model transport system to the externally triggered membrane reorganization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01870224
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    153. Funktionelle Diagnostik und befundgerechte Therapie beim postoperativen Rezidivulcus (1980)
    Springer
    Langenbeck's archives of surgery 352 (1980), S. 522-522 
    Details
    ISSN: 1435-2451
    Keywords: Recurrent ulcer ; Diagnostic ; Individual surgical treatment ; Rezidivulcus ; Funktionelle Diagnostik ; Individualisierende Operation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Auswahl des Operationsverfahrens im Korrektureingriff wegen eines Rezidivulcus sollte der vielschichtigen Pathogenese gerecht werden. Die Indikation zur konservativen Behandlung oder operativer Korrektur (Vagotomie oder Resektion alleine oder kombiniert) hängt wesentlich ab vom Ausfall präoperativer Funktionsteste, welche Röntgenuntersuchung, Sekretionsanalyse, Gastrinprofil nach Provokation und nuklearmedizinische Messungen von Magenentleerung und Gallereflux einschließen. Die guten Erfahrungen mit einem abgestuften Indikationsschema werden an 135 Fällen (94 Upj, 41 Rezidiven nach Vagotomie) dargestellt.
    Notes: Summary The choice of treatment (medical or surgical with single vagotomy or resection or a combination of the two methods) in recurrent ulceration after resection or nonresection depends on the results of different functional studies before reoperation. They include X-ray examination, secretion analysis, determination of serum gastrin in provocation and feeding tests, and measurement of gastric emptying and jejuno- or duodenogastric reflux by scintiscan. Good results are reported in 135 cases with the use of different procedures based on functional diagnostic parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292116
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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