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  • 1980-1984  (1)
  • 1975-1979  (2)
  • 1955-1959
  • Anaerobiosis  (1)
  • Anticoagulants  (1)
  • Blood clotting  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 53 (1975), S. 809-814 
    ISSN: 1432-1440
    Keywords: Blood clotting ; fibrinolysis ; streptokinase ; Blutgerinnung ; Fibrinolyse ; Streptokinase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mit Hilfe eines Clot-Lysis-Tests war es möglich, Streptokinasekonzentrationen in Humanplasma quantitativ zu erfassen. Das Testsystem bestand aus Rinderfibrinogen, Rinderplasminogen, Human-Euglobulin, EDTA, Humanplasma (mit unbekanntem Streptokinaseanteil) und Thrombin. Plasminogen und Fibrinogen lagen stark konzentriert vor, so daß Plasminogen und Fibrinogen des zu testenden Humanplasmas keine Rolle spielten. Ein Zusatz von EDTA verhinderte, daß Gerinnungsfaktoren und Thrombocyten des auszutestenden Humanplasmas auf die Clot-Lysis-Zeit einen Einfluß nahmen. Die Fehlerbreite der Methode für 2 E Streptokinase lag beis=±0,19 E pro ml Plasma, für 5 E Streptokinase beis=±0,47 E pro ml Plasma und für 20 E Streptokinase beis=2,50 E pro ml Plasma. Plasmen von Patienten, die sich einer fibrinolytischen Therapie unterziehen mußten, wurden auf ihren Streptokinasegehalt untersucht. Es wurden Streptokinasekonzentrationen von 0,7 E bis 15 E pro ml Plasma gemessen. Die Halbwertszeit für die Elimination der Streptokinase nach Beendigung der Infusionstherapie lag bei 18 min. Der Verfall von 5 E Streptokinase pro ml Plasma wurde über einen unterschiedlichen Zeitraum (15 und 60 min, 24 und 48 Std) und Inkubation bei Zimmertemperatur und +37° C untersucht. Es zeigte sich, daß bei Zimmertemperatur eine schnelle Verarbeitung zur Vermeidung von Aktivitätsverlusten notwendig ist. Im eingefrorenen Zustand geht keine Streptokinase verloren.
    Notes: Summary A method of a quantitative determination of plasma streptokinase concentrations in patients undergoing streptokinase infusion is described. The principle of this method is based on the clot lysis time recorded by the thromboelastograph. The test clot constituents were bovine fibrin, bovine plasminogen, human euglobulin, EDTA, human plasma (of unknown streptokinase quantity) and thrombin. As rather high concentrations (fixed excess) of plasminogen (euglobulin) and fibrinogen were present in the test coagulum, no interference with changing plasminogen and fibrinogen levels of the patient's plasma was observed. Furthermore, due to high EDTA concentrations, no interaction with platelet functions and coagulation factors took place. The standard deviation in measuring 2 u streptokinase in 1 ml human plasma was determined ass=±0.19 u/ml, of 5 u streptokinase ats=±0.47 u/ml and of 20 u streptokinase ats=±2.5 u in 1 ml of human plasma. Plasma samples of patients undergoing fibrinolytic treatment were investigated with regard to their streptokinase content. Streptokinase concentration values varied between 0.7 u and 15 u/ml plasma. The average half life of streptokinase in the organism was 18 min. The decay of streptokinase in plasma at different temperatures and over various periods of time was also determined. A considerable loss of streptokinase in the plasma during storage at room temperature could be observed. Therefore, the determination procedures should be carried out without delay.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 55 (1977), S. 489-493 
    ISSN: 1432-1440
    Keywords: Anticoagulants ; Reocclusion of arterial vessels ; Smoking abstinence ; Streptokinase treatment ; Vascular status evaluation ; Streptokinasebehandlung ; Antikoagulantien ; Reokklusion in Arterien ; Rauchkarenz ; Gefäßstatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 67 Patienten mit 68 durch Streptokinasebehandlung eröffneten Arterien wurden bis zu sechs Jahren später nachuntersucht. In zehn der 68 Fälle (=15%) war ein Reverschluß noch während des stationären Aufenthaltes aufgetreten. Das verbleibende Patientenkollektiv mit definitiv eröffneten Gefäßen gliederte sich in drei Gruppen: Patienten, bei denen eine Beurteilung der Gefäßverhältnisse möglich war (A), Patienten, die in der Zwischenzeit verstorben waren (B) und Patienten, bei denen aus technischen Gründen eine Ermittlung des Gefäßstatus ausgeschlossen war (C). Folgende Ergebnisse wurden in der Gruppe A ermittelt: 1 In den ersten Jahren nach der Streptokinasebehandlung stieg die Reverschlußrate stetig bis auf 21% an und schwankte bis zum 6 Jahr um diesen Wert. 2 Die A. iliaca schnitt als eröffnetes Gefäßsegment am besten ab. Ihre Reverschlußtendenz war minimal und lag über die 6 Jahre Beobachtungszeit hinweg um 0 bis 14%. 3 Die A. femoralis erreichte eine Reverschlußinzidenz von 4/15 (=27%) nach 1 Jahr, von 2/11 (=18%) nach 2 Jahren, von 2/6 (=33%) nach 3 Jahren und von 3/6 (=50%) nach 5 und 6 Jahren. 4 Die Reverschlußtendenz der Aorta bewegte sich zahlenmäßig zwischen den für die A. iliaca und A. femoralis ermittelten Raten. 5 Die konsequente und therapeutisch gut eingestellte orale Antikoagulantienbehandlung setzte die Reverschlußrate signifikant herab. Die Rauchkarenz wirkte tendenziell in gleicher Richtung, ohne allerdings das Signifikanzniveau zu erreichen.
    Notes: Summary 67 patients in whom a total of 68 arteries had been made patent by streptokinase treatment were observed for periods of up to six years. In ten of the 68 cases (=15%) reocclusion occurred while patients were still in the hospital. The remaining case material with definitely cleared vessels was divided into three groups: (A) patients in whom evaluation of the vascular status was possible; (B) patients who had died in the meantime; and (C) patients in whom the state of the vessels could not be ascertained for technical reasons. Listed below are the results obtained in Group (A): 1 The reocclusion rate showed a steady rise of up to 21% during the first three years following streptokinase treatment, and fluctuated around that value up to the end of the sixth year. 2 The iliac artery permitted the best results among the vascular segments cleared. The reocclusion rate was very low at 0 to 14% throughout the six-year observation period. 3 The femoral artery reached a reocclusion rate of 4/15 (=27%) after 1 year, of 2/11 (=18%) after 2 years, of 2/6 (=33%) after 3 years and of 3/6 (=50%) after 4 and 5 years. 4 The aortic reocclusion figure was between the figures ascertained for the iliac and femoral arteries. 5 Regular and therapeutically effective oral treatment with anticoagulants produced a significant drop in the reocclusion rate. Abstinence from smoking showed a similar trend which, however, did not reach the significance level.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2048
    Keywords: Anaerobiosis ; Protein synthesis, organspecific ; Stress ; Zea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pattern of protein synthesis was compared in several organs of maize (Zea mays L.) under aerobic and anaerobic conditions. Protein synthesis was measured by [35S]methionine incorporation and analysis by two-dimensional native-SDS (sodium lauryl sulfate) polyacrylamide gel electrophoresis and fluorography. The aerobic protein-synthesis profiles were very different for root, endosperm, scutellum and anther wall. However, except for some characteristic qualitative and quantitative differences, the patterns of protein synthesis during anaerobiosis were remarkably similar for these diverse organs and also for mesocotyl and coleoptile. The proteins synthesized were the anaerobic polypeptides (ANPs) which have been previously described in anaerobic roots of seedlings. Leaves exhibited no detectable protein synthesis under anaerobic conditions, and died after a short anaerobic treatment. Evidence is presented that the ANPs are not a generalized response to stress. This indicates that the ANPs are synthesized as a specific response to anaerobic conditions such as flooding.
    Type of Medium: Electronic Resource
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