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  • Ferrocyanid Clearance  (1)
  • PACS. 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) – 76.75.+i Muon spin rotation and relaxation – 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Functional heterogeneity of nephrons (1969)
    Springer
    Pflügers Archiv 308 (1969), S. 244-259 
    Details
    ISSN: 1432-2013
    Keywords: Flow Velocity in Single Nephron ; Ferrocyanide Clearance ; Ferrocyanide Located in Microdissected Nephrons ; Non-Uniformity of Nephron Function ; Nephron Dimensions ; Lineare Strömungsgeschwindigkeit im Einzelnephron ; Ferrocyanid Clearance ; Lokalisation von Ferrocyanid im mikrosezierten Nephron ; Ungleichheit der Nephronfunktion ; Nephrondimensionen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intraluminal flow velocities and tubular dimensions were estimated for superficial and deep proximal tubules of non-diuretic kidneys with a technique developed byHanssen. Kidneys of anesthetized rats were frozen in vivo 4–20 sec after an i.v. injection of 0.05 ml 10–20% Na ferrocyanide. Ferrocyanide was located as prussian blue in microdissected tubules after freeze-substitution and maceration of the kidneys. Its position was used to indicate the movement of glomerular filtrate along the tubule. Ferrocyanide clearance was slightly less than that of inulin at low plasma ferrocyanide levels. They were equal at higher plasma levels. The two clearances were sufficiently alike, however, to justify using ferrocyanide as an indicator of glomerular filtrate in these experiments. Transient small decreases in systemic blood pressure and increases in renal blood flow followed i.v. injections of 0.05 ml ferrocyanide and 0.05 ml 5% lissamine green. There was no evidence of continuing intraluminal flow when the kidney was rendered ischemic by ligating the renal pedicle. The mean distance between glomerulus and prussian blue front in kidneys frozen at different intervals after a ferrocyanide injection increased curvilinearly with time in a manner compatible with its indicating mean flow velocity. The distance between glomerulus and dye front in tubules from any one kidney was proportional to tubular length. Flow velocities were similar when measured with lissamine green in vivo or with ferrocyanide in microdissected tubules. Velocities decreased whenC inulin was reduced by partial compression of the renal artery. The reduction was greater in superficial than in deep tubules suggesting that flow velocities vary non-uniformly as gfr changes. Luminal diameters measured in microdissected tubules were similar to other estimates of in vivo tubular dimensions. There was no apparent difference between the length or luminal diameter of proximal tubules from the surface and deeper portions of the cortex in these rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586557
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Macroscopic and local magnetic moments in Si-doped CuGeO 3 as determined by neutron and μSR studies (2001)
    Springer
    The European physical journal 21 (2001), S. 307-311 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) – 76.75.+i Muon spin rotation and relaxation – 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The temperature-concentration phase diagram of the Si-doped spin-Peierls compound CuGeO3 is investigated by means of neutron scattering and muon spin rotation spectroscopy in order to determine the microscopic distribution of the magnetic and lattice dimerised regions as a function of doping. The analysis of the zero-field muon spectra has confirmed the spatial inhomogeneity of the staggered magnetisation that characterises the antiferromagnetic superlattice peaks observed with neutrons. In addition, the variation of the macroscopic order parameter with doping can be understood by considering the evolution of the local magnetic moment as well as of the various regions contributing to the muon signal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510170172
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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