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  • 1980-1984  (2)
  • Denitrification  (1)
  • Hemodynamics  (1)
  • Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry
  • 1
    ISSN: 1432-072X
    Keywords: Nitrous oxide reduction ; Copper proteins ; Cytochrome patterns ; Denitrification ; Pseudomonas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Copper is the essential transition element for nitrous oxide respiration in Pseudomonas perfectomarinus. Two novel kinds of copper proteins were detected in this organism. Their distribution was studied under different growth conditions and in other pseudomonads, as well as their association with N2O reduction of intact cells. A low molecular mass copper protein (M r 38,000) with a single absorption band at 340 nm (oxidized form), was found only in P. perfectomarinus and was not required for N2O reduction. N2O respiration was consistently associated with a high molecular mass copper protein (M r 120,000) in P. perfectomarinus, Pseudomonas stutzeri, and in strains of Pseudomonas fluorescens that were capable of this type of respiration. The oxidized protein was violet to pink with absorption bands at 350, 480, 530, 620, and 780 nm. Pseudomonas chlororaphis and Pseudomonas aureofaciens which did not respire with N2O as electron acceptor, did not contain the novel type of copper protein. Cytochrome patterns were compared in these denitrifying pseudomonads to search for the physiological electron carrier to N2O reductase. The content and nature of the soluble c-type cytochromes depended strongly on the species and the particular growth condition.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-2451
    Keywords: Septic shock ; Pulmonary functions ; Hemodynamics ; Prostaglandin metabolism ; Septischer Schock ; Lungenfunktion ; Hämodynamik ; Prostaglandinstoffwechsel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zur Pathogenese des septischen Schocks wurden folgende Untersuchungen durchgeführt: Die vasoaktiven Prostanoide Prostaglandin F2α(PGF2α), Prostacyclin (PGI2) und Thromboxan (TX) wurden im gemischtvenösen und arteriellen Plasma in einer klinisch definierten Frühphase radioimmunologisch bestimmt und wesentlichen hämodynamischen und pulmonalen Parametern zugeordnet. Dabei zeigte sich, daß unabhängig von der vorliegenden PGF2α-Aktivität hohe TX/PGI2-Quotienten mit hohem pulmonalen Gefäßwiderstand und schlechter Lungenfunktion einhergehen, während Überwiegen der PGI2-Aktivität mit deutlich besseren pulmonalen und peripheren Werten korreliert.
    Notes: Summary The pathogenesis of septic shock was investigated. Vasoactive prostanoids, prostaglandin F2α(PGF2α), prostacyclin (PGI2), and thromboxane (TX) were measured by radioimmunoassay in mixed venous and arterial plasma during a clinically defined early phase, and attributed to essential hemodynamic and pulmonary parameters. Data show that irrespective of the actual PGF2α activity, high TX/PGI2 ratios parallel high pulmonary vascular resistance, and bad pulmonary function, whereas a predominance of PGI2 activity correlates with significantly better pulmonary and peripheral parameters.
    Type of Medium: Electronic Resource
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