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  • 1970-1974  (4)
  • 1940-1944
  • 1973  (4)
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  • 1970-1974  (4)
  • 1940-1944
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  • 1
    facet.materialart.
    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 21:6 (1973) 661 
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  • 2
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    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 21:6 (1973) 708 
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 93 (1973), S. 179-193 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A new hydrogen bacterium has been isolated by enrichment culture on hydrogen, carbon dioxide, and oxygen. It is a strictly aerobic, Gram-positive, immotile rod. Irregular cell shapes, the snapping type of cell division and the partial fragmentation of the rods into coccoid cells in older heterotrophic cultures indicate that strain 14 g is a coryneform bacterium. Strain 14 g grows well in a mineral salts medium under a gas atmosphere of 80% hydrogen, 10% carbon dioxide and 10% oxygen. With increasing oxygen partial pressures, the growth rate decreases. While growth is good or excellent on organic acids, carbohydrates are utilized not at all. Autotrophically grown cells are able to oxidize organic substrates after a relatively short lag-phase. Growth is retarded when hydrogen is present in the gas atmosphere. Citrate utilization is even inhibited by hydrogen. In gluconate grown cells gluconokinase, the enzymes of the Entner-Doudoroff system and a NAD-dependent 6-phosphogluconate dehydrogenase are present. All enzymes are inducible. The uptake rate of the oxygen-hydrogen mixture by resting cells is very high and amounts to 2500 μl gas/mg protein·h. Carbon dioxide does not stimulate the oxyhydrogen-reaction. The hydrogenase activity of intact cells measured with methylene blue as a hydrogen acceptor is limited by the penetration of methylene blue into the cell. In cell-free extracts the hydrogen uptake rate amounts to 2260 μl H2/mg protein·h with methylene blue as H-acceptor. The hydrogenase of strain 14 g is a strictly inducible enzyme. It is completely part culate and does not reduce pyridime nucleotides.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 216 (1973), S. 33-40 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei zehn herz-kreislaufgesunden Gebärenden wurde während der Eröffnungsperiode das Herzzeitvolumen, Schlagvolumen und zentrale Blutvolumen in der Wehenpause, während der Wehe und beim Valsalva-Preßversuch untersucht. Die Bestimmungen erfolgten mit einer von Schneider und Rost modifizierten Indicatorverdünnungsmethode (Cardiogreen), wobei 80 Farbstoffverdünnungskurven ohrdensitometrisch registriert wurden. Während der Uteruskontraktion konnte ein Anstieg des Herzzeitvolumens um 26,9% gefunden werden, der im wesentlichen auf einer Steigerung des Schlagvolumens von 20% beruht, da die Herzfrequenz lediglich um 6% zunahm. Gleichzeitig kam es zu einer Erhöhung des zentralen Blutvolumens um etwa 300 ml (20%). Beim Pressen verminderte sich das Herzzeitvolumen um 32%, das Schlagvolumen um 41% und das zentrale Blutvolumen um 12%. Die Herzfrequenz stieg um 18% an. Die Untersuchungen brachten einen weiteren Einblick in die hämodynamischen Veränderungen während der Wehentätigkeit. Die beim Pressen auftretenden Verschiebungen des zirkulierenden Blutvolumens sowie die starke Abnahme des Herzzeitvolumens zeigen deutlich die Gefahren für herz-kreislaufkranke Schwangere und Risikokinder.
    Notes: Summary In 10 healthy pregnant women the cardiac output, stroke volume and central blood volume was determined during uterine contraction and valsalva maneuver in the first stage of labour. The determinations were carried out with a modified cardiogreen-solution-technique by Schneider and Rost. 80 cardiogreen dilutioncurves were registered with eardensitometry. During uterine contraction cardiac output rises about 26%, caused by a rise of stroke volume about 20%, as heartbeat goes up only about 6%. At the same time the central blood volume rised about 300 ml (20%). During valsalva maneuver the cardiac output was lowered about 32%, the stroke volume about 41% and the central blood volume about 12%. The heartbeat rose about 18%. The results revieled further inside into the haemodynamic regulation during uterus contraction. They also showed the changes of the circulating blood volume during pressing und a strong lowering of the cardiac output, which are dangerous for heart-circulating ill pregnant women and high risked children.
    Type of Medium: Electronic Resource
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