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  • 1
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 7341-7348 
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 54 (1992), S. 153-176 
    ISSN: 0066-4278
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Medizin , Biologie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 20 (2004), S. 0 
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Aim : To assess the pharmacokinetics of alosetron, its effect on in vivo enzyme activities, and influence of demographic factors during repeated dosing.Methods : Thirty healthy men and women received 1 mg oral alosetron twice-daily for 29.5 days and a single oral dose of a metabolic probe cocktail before and on the last day of alosetron dosing. Serum alosetron concentrations were measured on days 1, 8, 15, 22 and 29. Probe-substrate and metabolite concentrations were measured after each cocktail dose.Results : Alosetron accumulation in serum was negligible. Exposure to alosetron did not alter probe-metabolite/substrate ratios associated with CYP2C19, 2E1, 2C9, or 3A4 activity, but modestly decreased those associated with CYP1A2 and N-acetyltransferase activity. Systemic exposure to alosetron was higher in women, positively correlated with age and body mass index, and negatively correlated with CYP1A2 activity. Incidence of constipation was higher in women, but not associated with alosetron concentration.Conclusions : Single dose data can reliably predict the pharmacokinetics of alosetron after repeated doses. Alosetron exhibits limited potential for inhibition of cytochrome P450-mediated metabolism. Interindividual differences in alosetron pharmacokinetics associated with demographic factors may be related to strong dependence on metabolism by CYP1A2.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 26-29 
    ISSN: 1600-5759
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    OR spectrum 13 (1991), S. 37-44 
    ISSN: 1436-6304
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Beschreibung / Inhaltsverzeichnis: Summary The following contribution describes the planning of the production in a metallurgical plant with four blast furnaces. Basing on a fixed demand for pig iron per day which is to be fulfilled, it is to decide, how the production is to distribute among the four blast furnaces, when the costs of production are to be minimized. Subsequently the problem is extended by changing the demand for pig iron step by step. The optimal solution of this problem is achieved by using the methods of linear programming and mathematical statistics.
    Notizen: Zusammenfassung Der folgende Beitrag beschreibt die Produktionsplanung für ein Hochofenwerk mit vier Hochöfen. Ausgehend von einer fest vorgegebenen Erzeugungsmenge muß entschieden werden, wie die Produktion auf vier Hochöfen zu verteilen ist, damit die Produktionskosten das Minimum erreichen. Für die Lösungsdarstellung wird die zu erzeugende Roheisenmenge schrittweise verändert. Die optimale Lösung wird mit Hilfe der Linearen Optimierung und der mathematischen Statistik ermittelt.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1434-601X
    Schlagwort(e): PACS. 25.80.Ls Pion inclusive scettering and absorption
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: The absorption of π+ on Ar was studied at pion energies of 70, 118, 162, 239 and 330MeV, and on N and Xe at 239MeV. Twenty-six absorption reaction channels with at least two energetic charged particles in the final state have been evaluated. Partial cross-sections have been determined according to the number of protons, neutrons and deuterons in the final state.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Journal of molecular medicine 72 (1994), S. 277-282 
    ISSN: 1432-1440
    Schlagwort(e): Idiopathic membranous glomerulonephritis ; Treatment
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Because of the high rate of spontaneous remission, treatment of membranous nephropathy with prednisolone and chlorambucil is still controversial. The aim of this study was to give this therapy only to those patients at risk of developing renal insufficiency and to test the efficacy of a low-dose therapeutic regimen. Seventeen patients with more than 10 g protein excretion per day (mean 16.9) and/or a deterioration in renal function (mean serum creatinine, 162 μmol/l) were included. Serum total protein, serum lipids, proteinuria, serum creatinine, and blood pressure were measured, along with the diuretic and antihypertensive medication. The observation time before the start of treatment was 27 ± 27 months. Steroids were given during months 1, 3, and 5 (methylprednisolone 3 × 500 mg intravenously) prednisolone 0.5 mg/kgBW daily per os for 1 week, then tapered by 0.1 mg/kg BW/week for 1 month. Chlorambucil was given during months 2, 4, and 6 at a dose of 0.12 mg/kgBW daily. At the end of treatment proteinuria had significantly decreased (mean of all patients, 7.8 ± 1.4 g/d) in all patients. Six months after the end of treatment proteinuria was significantly lower than at baseline in 14 of 17 patients. Hypoproteinemia and hyperlipidemia had improved; diuretic and antihypertensive medication were reduced. Elevated serum creatinine decreased in 7 of 9 patients (pretreatment, 227 ± 39 μmol/1; 6 months, 176 ± 28 μmol/l). Nonresponders with respect to serum creatinine responded with respect to proteinuria. Regarding adverse effects, two patients complained of dyspepsia while taking steroids; during chlorambucil treatment two patients experienced nausea and lack of appetite, and one developed leukopenia (1600/μl). Chlorambucil was stopped and cell counts normalized 2 weeks later. We conclude that low-dose prednisolone/chlorambucil is both safe and efficient in the majority of patients with severe membranous nephropathy.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Journal of molecular medicine 70 (1992), S. S120 
    ISSN: 1432-1440
    Schlagwort(e): Hypertension ; Kidney ; Antihypertensive drugs
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Antihypertensive therapy influences kidney function by different mechanisms depending on the mode of action of the drug used. The GFR is improved by calcium entry blockers and ACE inhibitors, unaffected by vasodilators, α-blockers and centrally acting sympatholytics and impaired by β-blockers. The same is true for renal blood flow and is due to changes of renal vascular resistance. Renal sodium excretion is impaired mostly by vasodilators, by α-blockers, sympatholytics and β-blockers; in contrast, calcium entry blockers and ACE inhibitors acutely induce natriuresis. The RAAS is stimulated by vasodilators, unaffected by α-blockers and sympatholytics and suppressed by β-blockers. Plasma catecholamines are stimulated by vasodilators and suppressed by centrally acting sympatholytics and unaffected by the others. Induction of acute renal functional impairment is reported for ACE inhibitors under conditions of compromised renal perfusion pressure such as in renal artery stenosis. These data from the literature reviewed are supported by our own experimental data on sodium balance under different drugs and micropuncture data in experimental renal artery stenosis. To achieve effective antihypertensive treatment with a low profile of side effects, careful monitoring of renal function seems to be mandatory.
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Der Orthopäde 29 (2000), S. 151-157 
    ISSN: 1433-0431
    Schlagwort(e): Schlüsselwörter Bioimplantat • Biomechanik •¶Knorpeldefekt • Knorpelregeneration •¶Mesenchymale Zelldifferenzierung ; Key words Bioimplant • Biomechanics • Cartilage ¶defect • Cartilage repair • Mesenchymal cell differentiation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary Hyaline cartilage is thought to be unable to regenerate. All efforts so far – including autologous chondrocyte cell transplantation – to reconstruct cartilage defects in joints have not been totally convincing. However, mesenchymal cells are able to differentiate into chondrocytes under mechanical pressure conditions. In this study, an open porous resorbable two-layer “bioimplant” was constructed in which mechanical pressure was exerted onto mesenchymal cells when migrated into the open porous structure of the bioimplant. Differentiation of the cells into chondrocytes was thus induced. The bioimplants were implanted into the medial condyles of nine rabbits and left in place for eight or twelve weeks, respectively. In seven of these cases, cartilage formation was found, in contrary to the controls in which only connective tissue and bone had grown into the empty holes. The new bioimplants have proven their effectiveness in cartilage defect repair and might evolve in the future as a new alternative treatment of full thickness defects of joint surfaces.
    Notizen: Zusammenfassung Gelenkknorpel gilt in der Regel als nicht regenerationsfähig. Bis jetzt durchgeführte Versuche zur Wiederherstellung des Gelenkknorpels, inklusive der Knorpelzelltransplantation, zeigten wenig erfolgversprechende Ergebnisse. Jedoch gibt es Hinweise, dass unter Druckbelastung mesenchymale Stammzellen sich in Knorpelzellen differenzieren können. In der vorliegenden Studie wurde ein offenporiges resorbierbares, zweischichtiges „Bioimplantat“ konstruiert, das nach Implantation in einen Knochen-Knorpel-Defekt die physiologischen Druckverhältnisse nachahmt und so eine Differenzierung von mesenchymalen Stammzellen zu hyalinem Knorpel ermöglicht. An 9 Kaninchen wurde dieses Bioimplantat an Knochenknorpeldefekten des Femurkondylus über 2 verschiedene Zeiträume erprobt und mit Leerlochversuchen verglichen. Durch die Bioimplantate gelang es im Gegensatz zu den Leerlochversuchen in 7 von 9 Fällen Bereiche mit hyalinartigem Knorpel zu induzieren. Die Methode scheint einen neuen erfolgsversprechenden Ansatz zur Reparation von Knorpeldefekten darzustellen.
    Materialart: Digitale Medien
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  • 10
    facet.materialart.
    Unbekannt
    Berlin, etc. : Periodicals Archive Online (PAO)
    Philologus. 37 (1877) 178 
    ISSN: 0031-7985
    Thema: Klassische Philologie, Byzantinistik, Mittellateinische und Neugriechische Philologie, Neulatein
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