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  • 1
    ISSN: 1432-2013
    Keywords: Avian ADH ; Avian osmoregulation ; Cerebral osmosensitivity ; Hypothalamic temperature ; Vagal afferents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In conscious Pekin ducks adapted either to fresh water or to hypertonic saline (1.9%) as drinking fluid, urinary excretion, salt gland secretion and the serum concentration of radioimmunoassayable arginine-vasotocin (AVT) were examined with regard to their afferent and central control. The experiments were carried out under conditions of water diuresis, osmotic diuresis or supraorbital salt gland secretion, which were induced by continuous infusions of appropriate solutions. Temporary bilateral vagus blockade caused rises in AVT serum concentration accompanied by antidiuresis in hydrated ducks and by inhibition of salt gland secretion in salt-stressed ducks. Rostral brainstem cooling caused decreases of AVT serum concentration and water diuresis in ducks under osmotic diuresis and reduction of AVT serum concentration and inhibition of salt gland secretion in saltstressed ducks. Cerebral osmotic stimulation in hydrated ducks by intracarotid injection or by intracerebroventricular microinfusion of hypertonic NaCl solutions caused antidiuretic reactions associated with rises of AVT serum concentration.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Clinical and experimental medicine 146 (1968), S. 329-335 
    ISSN: 1591-9528
    Keywords: Aldosterone ; Metabolism ; Protein-binding ; Renal clearance ; Aldosteron ; Stoffwechsel ; Eiwei\bindung ; Nierenclearance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im menschlichen Blutplasma wurde vermittels äquilibriumDialyse die Eiwei\bindung für Tetrahydroaldosteronglucuronid mit 35–39% und diejenige für 18-Aldosteronglucuronid mit 54–57% bestimmt. Auf Grund dieser Werte und der früher mitgeteilten renalen Clearance dieser beiden Aldosteronmetaboliten, welche die Eiwei\bindung nicht berücksichtigte [13], ergibt sich für das Tetrahydroaldosteronglucuronid eine renale Clearance im Bereich derjenigen des Inulins und für das 18-Aldosteronglucuronid eine solche im Bereich der PAHClearance.
    Notes: Summary In equilibrium dialysis with human blood plasma and human albumin the protein binding of tetrahydroaldosterone glucuronide was 35 to 39% and the protein binding of 18-aldosterone glucuronide was 54 to 57%. The “uncorrected” renal clearance values of these two aldosterone metabolites, as published bySiegenthaler et al. [13], were “corrected” for protein binding. So the renal clearance of tetrahydroaldosterone glucuronide is similar to the renal clearance of inulin, whereas the renal clearance of 18-aldosterone glucuronide lies in the range of the PAH clearance.
    Type of Medium: Electronic Resource
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