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  • 6 beta-hydroxycortisol  (1)
  • Mucosal blood flow  (1)
  • Solanum megistacrolobum  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    European journal of clinical pharmacology 15 (1979), S. 193-197 
    ISSN: 1432-1041
    Schlagwort(e): norethisterone ; rifampicin ; enzyme induction ; antipyrine ; 6 beta-hydroxycortisol ; gamma-glutamyltranspeptidase
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Summary The pharmacokinetics of norethisterone have been studied in 8 women during and one month after treatment with rifampicin (450–600 mg/day). Rifampicin caused a significant reduction in the A. U. C. of a single dose of 1 mg norethisterone from 37.8±13.1 to 21.9±5.9 ng/ml X h (p〈0.01). The plasma norethisterone half life (β-phase) was also reduced from 6.2±1.7 to 3.2±1.0 h (p〈0.0025). In one additional woman on long term oral contraceptive therapy the 12 hour plasma norethisterone concentration was reduced by rifampicin from 12.3 ng/ml to 2.3 ng/ml. Rifampicin caused a significant increase in antipyrine clearance, 6β-hydroxycortisol excretion and plasma gamma-glutamyltranspeptidase activity but there were no significant correlations between changes in these indices of liver microsomal enzyme induction. There was a significant correlation between the percentage increase in antipyrine clearance and the percentage decrease in norethisterone A. U. C. during rifampicin. The changes in norethisterone pharmacokinetics during rifampicin therapy are compatible with the known enzyme inducing effect of rifampicin.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1435-2451
    Schlagwort(e): Cytoprotection ; Prostaglandin ; Mucosal blood flow ; Cytoprotektion ; Prostaglandin ; Magendurchblutung
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Der Mechanismus der Cytoprotektion von Prostaglandin (PG) auf die Magenmucosa ist unbekannt. Anaesthesierte Kaninchen erhielten in der Gruppe (GR) I (n=8) im. Aspirin (ASA) (100 mg/kg als Bolus, 66 mg/kg/h kontinuierlich) in der GR 11 (n=10) NaCI und in der GR III (n=7) zusätzlich zum ASA, PGE I (0,1 μg/kg/min) als Infusion über 120 min. Der Mucosa-Blutfluß (MBF) wurde mit radioaktiven Mikrosphären gemessen. In der GR I fiel der MBF nach 15 min um 72,3+3,8% (+ SEM) und nach 120 min um 73,1+3,8% (p 0,05 gegen % Änderung in GR II und III). Nach 120 min zeigte sich in der GR I 19,8 + 7,6% der Fundusmucosa hämorrhagisch, in der GR 11 6,1 +5,2% und in der GR 1112,0+ 1,4% (p 0,05 gegen GR II und III). Wir schließen, daß der cytoprotektive Effekt des PGE I auf einer Aufhebung der ASA bedingten Mucosaischämie beruht.
    Notizen: Summary The mechanism by which prostaglandins (PG) exert their cytoprotective effect on the gastric mucosa is not known. Anesthetized rabbits received in Group (GR) I (n = 8) i.v. aspirin (ASA) (100 mg/kg as bolus, 66 mg/kg/h continuously), in GR II (n=10) NaCl and in Gr III PGE I (0.1 μg/kg/min) as an infusion for 120 min. Mucosal blood flow (MBF) was measured with radioactive microspheres. After 15 min, fundus MBF had decreased in GR I by 72.3+3.8% (+SEM) and after 120 min by 73.1+3.8% (P 0.05 vs % change in GR II and III). After 120 min, 19.8+7.6% of the mucosa had become hemorrhagic in GR I, 6.1+5.2% in GR II and 2.0+1.4% in GR III (P 0.05 vs GR II and III). We conclude that the cytoprotective effect of PGE I may be mediated through prevention of ASA-induced mucosal ischemia.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Euphytica 31 (1982), S. 665-676 
    ISSN: 1573-5060
    Schlagwort(e): Solanum ajanhuiri ; Solanum stenotomum ; Solanum megistacrolobum ; cultivated potatoes ; frost resistance ; wild x cultivated potato hybrids
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The origin and nature of the diploid cultivated potato species S. ajanhuiri Juz. et Buk. was studied. Several lines of evidence indicate that S. ajanhuiri might be derived from natural crosses between primitive cultivars of the diploid species S. stenotomum and the wild species S. megistacrolobum. Morphological comparisons were made between S. stenotomum x S. megistacrolobum F1 hybrids and naturally occurring S. ajanhuiri to investigate this hypothesis. Comparisons were also made between S. ajanhuiri x S. stenotomum crosses and the F2 generation of the first-mentioned cross. Crosses between the two major groups of S. ajanhuiri cultivars, Ajawiri and Yari, showed not only genetic breakdown but also a wide range of phenotypic variation similar to those of artificial F2 families of S. stenotomum x S. megistacrolobum. Furthermore, there was strong evidence showing that the Yari group of S. ajanhuiri could almost certainly be an F1 S. stenotomum x S. megistacrolobum hybrid, whereas the Ajawiri group could be a backcross of an F1 hybrid to S. stenotomum. These results added further support to the hypothesis of a hybrid origin of S. ajanhuiri, as well as indicating its putative parents. It is suggested that this hybridogenic taxon be retained at the species level under the name Solanum x ajanhuiri.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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