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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 85 (1963), S. 2616-2621 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 47 (1996), S. 509-540 
    ISSN: 1040-2519
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Notes: Abstract Plant gene responses to changing carbohydrate status can vary markedly. Some genes are induced, some are repressed, and others are minimally affected. As in microorganisms, sugar-sensitive plant genes are part of an ancient system of cellular adjustment to critical nutrient availability. However, in multicellular plants, sugar-regulated expression also provides a mechanism for control of resource distribution among tissues and organs. Carbohydrate depletion upregulates genes for photosynthesis, remobilization, and export, while decreasing mRNAs for storage and utilization. Abundant sugar levels exert opposite effects through a combination of gene repression and induction. Long-term changes in metabolic activity, resource partitioning, and plant form result. Sensitivity of carbohydrate-responsive gene expression to environmental and developmental signals further enhances its potential to aid acclimation. The review addresses the above from molecular to whole-plant levels and considers emerging models for sensing and transducing carbohydrate signals to responsive genes.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 20 (2004), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford BSL : Blackwell Science
    Alimentary pharmacology & therapeutics 11 (1997), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Ranitidine hydrochloride (Zantac) is one of the most extensively studied and widely used drugs of all time. This has provided an excellent opportunity to define its safety profile. Methods: Data from 189 controlled clinical trials in which more than 26000 patients received daily doses of ranitidine for 4 weeks or more were reviewed. More than 80% of patients were treated with up to 300 mg ranitidine daily; the remaining patients received doses of up to 1200 mg daily. Eighty-seven trials were placebo controlled. Analyses of post-marketing surveillance and a database of all spontaneously reported adverse events were also evaluated. Results: Overall in the clinical trial programme adverse events were reported by 20% of those receiving ranitidine compared with 27% of those receiving placebo. The pattern of events was similar in all treatment groups with no evidence of dose-related toxicity in regimens encompassing an eightfold range of therapeutic doses. Similarly in a programme of studies designed to evaluate a dose of ranitidine of 75  mg for non-prescription (over-the-counter) use in the treatment of heartburn, ranitidine was not associated with an adverse event profile distinct from that of placebo. Analysis of spontaneously reported adverse event data allowed identification of rare idiosyncratic events. Conclusions: Review of data from a large population of controlled clinical trials with analyses of postmarketing surveillance studies and spontaneously reported adverse events confirmed the excellent safety profile of ranitidine.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 325 (1969), S. 952-954 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Unter den 32 Patienten, die in der Zeit zwischen 1966 und 1968 mit manifester Tetanuserkrankung zur stationären Behandlung kamen, waren 21 weder aktiv noch passiv immunisiert worden. Die übrigen 11 hatten teils Tetanol, teils heterologes Serum oder eine Kombination beider erhalten. Nach der stationären Aufnahme wurden alle aktiv immunisiert und mit heterologem oder homologem Serum behandelt. Bestimmungen des neutralisierenden Antitoxintiters zeigten bei vergleichbarer Dosierung die Überlegenheit des humanen Hyperimmunglobulins. Aus immunologischen Überlegungen wird bei manifester Erkrankung die Gabe von homologem Serum empfohlen.
    Notes: Summary Amongst the 32 patients, who came to us for hospital treatment for manifest tetanus between 1966 and 1968, 21 were neither actively nor passively immunised. The remaining 11 had received either Tetanol or heterologous serum or a combination of the two. After admission to hospital, they were all actively immunised and treated with either heterologous or homologous serum. Determination of the neutralising antitoxin titres demonstrated the superiority of the human hyper-immunoglobulin using comparative dosage. As a result of immunological consideration, we would recommend administration of homologous serum in cases, where the disease is manifest.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1434-601X
    Keywords: PACS. 25.80.Ls Pion inclusive scettering and absorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 130 (1951), S. 409-414 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung An Proben mit Vorzugsrichtung der Magnetisierung wird festgestellt, da\ ein Hilfsfeld von höherer Frequenz die Auslösung und den Ablauf der Magnetisierungssprünge fördert und damit — bei gegebenen Werten des Hauptfeldes — eine Erhöhung des Wertes der Sättigungsmagnetisierung und der Remanenz bewirkt.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 131 (1952), S. 143-155 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung In Fortführung der AnsÄtze von H.Fröhlich werden die Koeffizienten der vier Transversaleffekte abgeleitet, sie weisen gerade jene Kopplung der Vorzeichen auf, die sich aus den bisher bekannten Me\resultaten ergibt. Es wird ferner gezeigt, da\Ettingshausen- undNernst-Effekt als thermoelektrische SekundÄreffekte aufgefa\t werden können, die durch die Begrenzung der Versuchsstreifen in LÄngsrichtung entstehen.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1433-0431
    Keywords: Schlüsselwörter Bioimplantat • Biomechanik •¶Knorpeldefekt • Knorpelregeneration •¶Mesenchymale Zelldifferenzierung ; Key words Bioimplant • Biomechanics • Cartilage ¶defect • Cartilage repair • Mesenchymal cell differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: 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.
    Notes: 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.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 290 (1933), S. 167-176 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung In 15 von 46 mit virulenten Pneumokokken infizierten Tieren wird 4–48 Stunden nach der Infektion eine Glomerulitis beobachtet. Diese Glomerulitis entspricht in den wesentlichen Kennzeichen der akuten Glomerulonephritis des Menschen bei 9 Kaninchen: sie ist streng diffus, besteht vorwiegend aus einer proliferativen Endothelreaktion, die Zeichen von Zellschädigung fehlen. Anzeichen einer der produktiven Glomerulusveränderung voraufgehenden Durchblutungsstörung der Glomeruli fehlen. Bei 6 Kaninchen findet sich dieselbe Veränderung beschränkt auf wenige Schlingen weniger Glomeruli. Die erhobenen Befunde deuten darauf hin, daß die akute diffuse Glomerulonephritis des Kaninchens aufzufassen ist als eine primäre Endothelreaktion, die, ausgelöst durch direkte Einwirkung auf die Kapillarendothelien, sich in kurzer Zeit über die Capillaren aller Glomeruli ausbreitet und ihrerseits zu Zustandsänderungen im und später zu Obliteration des Capillarraumes führt.
    Type of Medium: Electronic Resource
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