Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Renal blood flow  (3)
  • Diuretics  (2)
  • Organic Chemistry  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Effects of dopamine on whole kidney function and proximal transtubular volume fluxes in the rat (1977)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 296 (1977), S. 289-292 
    Details
    ISSN: 1432-1912
    Keywords: Renal transport ; Dopamine ; β-Adrenoreceptors ; Micropuncture ; Renal blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The renal effects of dopamine were studied using clearance and micropuncture techniques in rats. Intravenous infusion of dopamine (4.7 · 10−6 mol · kg−1 · h−1) increased glomerular filtration rate and renal blood flow. Renal blood flow was measured by an electromagnetic flowmeter. The increase in filtered fluid and sodium was nearly completely matched by increased tubular reabsorption. Thus, only a small rise in urine flow and in urinary sodium excretion was observed. The micropuncture experiments using the split oil droplet method of Gertz demonstrated a stimulation of the transepithelial fluid transfer after injection of dopamine (10−4M) into the proximal tubular lumen. This effect was abolished by simultaneous injection of propranolol (10−3 M) which, by its own, did not affect transtubular volume fluxes. It is concluded that dopamine, by stimulation of β-adrenoceptors, may increase reabsorptive capacity of the proximal tubular epithelium independent of changes in renal hemodynamics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00498695
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Renal effects of furosemide in glycerol induced acute renal failure of the rat (1976)
    Springer
    Pflügers Archiv 365 (1976), S. 81-87 
    Details
    ISSN: 1432-2013
    Keywords: Renal failure ; Micropuncture ; Diuretics ; Glomerular filtration rate ; Effective filtration pressure ; Renal blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The renal effects of furosemide in acute renal failure of the rat were studied using clearance and micropuncture techniques. Acute renal failure was induced by an intramuscular injection of 50% glycerol (10 ml/kg). Functional impairement of the glycerol treated animals consisted of a decrease in urinary sodium excretion, renal blood flow, total kidney GFR and effective filtration pressure of superficial nephrons. Effective filtration pressure was calculated from proximal free flow and stop flow pressure measurements. In contrast to control animals furosemide did not increase urine volume during acute renal failure due to a marked fall in GFR. Renal blood flow, as measured by an electromagnetic flowmeter, also decreased after furosemide in glycerol treated rats and increased in control animals. Furosemide reduced effective filtration pressure during acute renal failure to almost zero, whereas in control animals effective filtration pressure virtually remained constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00583631
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Action of the competitive angiotensin II antagonist saralasin during the initial phase of glycerol-induced acute renal failure of the rat (1977)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 301 (1977), S. 139-143 
    Details
    ISSN: 1432-1912
    Keywords: Renal function ; Renal blood flow ; Glomerular filtration rate ; Urine volume ; Urinary sodium excretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effects of the competitive angiotensin II antagonist saralasin (1-sarcosine-8-alanine-5-isoleucine-angiotensin II) on renal function in healthy rats and in rats with myohemoglobinuric acute renal failure were studied. Acute renal failure was induced by an intramuscular injection of 50% glycerol (10 ml ·kg−1). Functional impairment of the glycerol treated animals consisted in a decrease of renal blood flow (electromagnetic flowmeter) and GFR and in an increase of urine volume and arterial blood pressure. In healthy rats saralasin (6 μg·kg−1·min−1 i.v.) had no renal effects by itself but antagonized the angiotensin II (200 ng·kg−1·min i.v.) induced fall of renal blood flow and GFR and the increase of arterial blood pressure. Given to glycerol treated animals saralasin did not induce any change of arterial blood pressure, renal blood flow, GFR or the urinary excretion of fluid and sodium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00501429
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effects of ozolinone, a diuretic active metabolite of etozoline, on renal function (1978)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 304 (1978), S. 289-296 
    Details
    ISSN: 1432-1912
    Keywords: Diuretics ; Clearance technique ; Micropuncture ; Tubular function
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effects of ozolinone (3-methyl-4-oxo-5-piperidino-thiazolidine-2-ylidene) on renal tubular and glomerular functions were studied in rats using clearance and micropuncture techniques. Ozolinone (50 mg·kg−1 i.v., 50 mg·kg−1·h−1i.v.) markedly increased urine volume, urinary sodium excreation and — to a minor extent — also urinary potassium excretion. Fractional tubular sodium reabsorption fell by 14%. Renal blood flow, as measured by an electromagnetic flowmeter, increased considerably during the administration of the drug. Despite the fact that ozolinone increased intratubular hydrostatic pressure, whole kidney as well as single nephron GFR—measured at different tubular sites — remained constant due to an increase in glomerular capillary pressure (stopped flow measurements, servo nulling technique). The diuretic decreased intrinsic reabsorptive capacity of the proximal tubular epithelium as measured with the shrinking drop technique of Gertz, but had no clearcut effects on proximal fractional reabsorption. Fractional reabsorption was evaluated not only from free flow endproximal tubular fluid to plasma inulin measurements but also from transit time and half time of reabsorption (shrinking drop technique). An impressive depression of fluid, sodium and potassium reabsorption occurred in the loops of Henle after ozolinone. No further inhibition of fluid and sodium reabsorption in the distal convoluted tubules could be detected after the drug using a free flow recollection technique. Concerning the tubular site of renal action there is a striking similarity between ozolinone and the strong acting diuretic furosemide, although the chemical structures of these drugs are quite different. Differences between the two drugs exist concerning the endproximal tubular chloride concentration, which was decreased by furosemide but was not affected by ozolinone. This points to different effects of the drugs on proximal tubular bicarbonate reabsorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00507971
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Cation selective tubular carrier-PVC-membranes containing polymeric plasticizer with low tendency of migration for Solid State Contact Electrodes (1994)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 336 (1994), S. 575-580 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The lifetime of cation selective carrier-PVC-membranes partially depends on the components' remaining in the membrane. An exchange of monomeric by polymeric plasticizers with low tendency to migrate lengthens the function time drastically. Other than for Na+ - and NH4+-selective membranes, it is essential for K+ - and Ca2+-selective membranes and optional for H+-selective membranes to incorporate lipophilic anions in order to make the phase transfer catalysis more efficient. The resistence to saponification of phthalic acid polyester gives H+-selective membranes a high stability of measured values even in the alkaline range.For anion selective PVC-membranes, instead of cation selective plasticizers the plasticizing qualities of a liquid charged ligand should be used.The tubular carrier-PVC-membranes of our ion selective flow through measuring systems are diffusion welded to the ends of two PVC-tubes [1] so that they are absolutely tight with no risk of potential leakage. Migration of the membrane components plasticizer and ionophore across this border as well as their extraction [2, 3] into the measuring solution [4] will naturally reduce the membrane's functionning time [5].
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19943360703
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Substituierte Alkinyle als axiale Liganden an häminähnlich gebundenem Eisen(III) - Einordnung in eine spektrochemische SerieHerrn Professor Dr. E. Hoyer zum 60. Geburtstag gewidmet (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 423-430 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Substituted Alkinyles as Axial Ligands at Hemine Like Bound Iron(III) - Incorporation into a Spectrochemical Series.Substituted lithium alkynyles Li—C≡C—R (R = tBu, Ph, p-Cl—C6H4, Me3Si, iPr3Si, Ph3Si) react with the hemine like macrocyclic iron(III) complex 6,13-di(ethoxycarbonyl)-5, 14-dimethyl-1, 4, 8, 11-tetraazatetradeca-4,6,12,14-tetraenato[2-]iron(III)-iodide (formula 2;) in tetrahydrofuran to form anionic low-spin di-adducts [fe(C≡C—R)2]-. The incorporation of the alkynyles into a spectrochemical series of the axial ligands (studied by the sharp equatorial-ligand-to-metal CT absorption band) results in the wavelength-sequence (nm): OH- (≍ 510) « N3- (≍ 625) 〈 tBu—C≡C- (664) 〈 NH3 (666) 〈 Ph—C≡C- (692) 〈 Ph—NH2 (695) 〈 Me3Si—C≡C- (698) 〈 SCN- (713) 〈 Ph3Si—C ≡ C- (716) 〈 CN- (739) 〈 4-picoline (759) 〈 pyridine (765) 〈 nicotinamide (776) 〈 methylnicotinat (788) 〈 pyrazine (798) and points to a significant π-acceptor ability of the silyl substituents.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330307
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...