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  • 1
    Electronic Resource
    Electronic Resource
    Left atrial pressure and sodium balance in conscious dogs on a low sodium intake (1977)
    Springer
    Pflügers Archiv 370 (1977), S. 59-66 
    Details
    ISSN: 1432-2013
    Keywords: Conscious dogs ; Sodium balance ; Low sodium intake ; Left atrial pressure ; Reversible mitral stenosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 10 conscious chronically prepared dogs were used. After recovery from thoracotomy (catheter into the left atrium, nylon purse string around the mitral annulus) they were kept chronically on a low sodium intake (〈0.5 meq Na/kg bw daily). On 51 days left atrial pressure (LAP) was increased for 60 min about 10 cm H2O once daily by tightening the purse string (distension period: DP). During DP urine volume ( $$\dot V$$ ) increased about threefold, and sodium excretion (E Na) about sixfold. The amount of renal sodium loss on the days when LAP was increased exceeded the daily intake considerably. The application of DOCA (15 mg i.m.) did not diminishE Na during DP and 60 min thereafter. During DP heart rate increased by about 70 b/min and mean arterial blood pressure increased by about 15 mm Hg. The data suggest that stimulation of intrathoracic receptors by a reversible mitral stenosis augments renal sodium excretion even in a state of a highly stimulated tubular sodium resorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00707946
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Renal sodium handling in intact and renal denervated dogs (1986)
    Springer
    Pflügers Archiv 407 (1986), S. 382-387 
    Details
    ISSN: 1432-2013
    Keywords: Conscious dogs ; Renal nerves ; Sodium balance ; Osmoregulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The ability to retain sodium was investigated in six conscious dogs before and after surgical renal denervation. 1. Dietary sodium and water intake were kept constant (2.5 mmol Na·kg−1 bw·day−1 and 91 ml water·kg−1 bw·day−1). Balance experiments were performed from 6 days before to 8 days after having produced a sodium deficit of 6.4±0.4 (intact dogs) and 5.8±0.2 (renal denervated dogs) mmol Na·kg−1 bw by means of a peritoneal dialysis (PD). Having the same sodium excretion before PD, intact and renal denervated dogs demonstrated a similar striking decrease of sodium excretion and a similar increase of plasma renin activity after PD until the amount of sodium lost had been replenished (4th day after PD). In intact and renal denervated dogs plasma sodium concentration (PNa) decreased and renal water excretion increased on the first day after PD, indicating a homeostatic response to the fall of PNa. 2. After dietary sodium restriction (from 2.5 to 0.5 mmol Na·kg−1·day−1) a similar striking decrease of renal sodium excretion occurred in intact and renal denervated dogs. It therefore is concluded that in conscious dogs the presence of the renal nerves is not essential in order to maintain body sodium homeostasis after an acute sodium loss or after dietary sodium restriction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652622
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fermion condensation in the field strength approach to non-abelian yang-mills theories (1992)
    Springer
    The European physical journal 343 (1992), S. 79-101 
    Details
    ISSN: 1434-601X
    Keywords: 11.30.R ; 12.38 ; 12.50.L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Within the field strength approach to Yang-Mills theories the fermionic sectors of gauge theories are bosonized for the SU(2) and SU(3) gauge group. The emerging effective meson theories are studied in the tree approximation. In this approximation the original minimal gauge coupling of the quarks to gluons is rendered into an effective local four-fermion interaction with non-trivial Lorentz and gauge structure. The Schwinger-Dyson equation is solved in the strong coupling limit and the quark condensates and constituent masses are evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291601
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    Paper (German National Licenses)
    Fulltext
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