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  • Springer  (24)
  • American Heart Association (AHA)
  • Nature Publishing Group (NPG)
  • Oxford University Press
  • 2010-2014
  • 1990-1994  (9)
  • 1975-1979  (9)
  • 1970-1974  (6)
  • 1991  (9)
  • 1977  (9)
  • 1971  (6)
Document type
Publisher
Years
  • 2010-2014
  • 1990-1994  (9)
  • 1975-1979  (9)
  • 1970-1974  (6)
Year
  • 1
    ISSN: 1591-9528
    Keywords: Mean arterial blood pressure ; Heart rate ; Renal transport system ; Mittlerer arterieller Blutdruck ; Herzfrequenz ; Renales Transportsystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei der narkotisierten vagotomierten Ratte wurde über 2 Std die Wirkung von intraperitoneal injiziertem Guancydin auf den mittleren arteriellen Blutdruck und die Herzfrequenz beobachtet. Hier konnte ein dosisabhängiger blutdruck- und frequenzsenkender Effekt nachgewiesen werden. Nephrektomierte Tiere oder Tiere mit doppelseitiger Ureterligatur und ureteroabdomineller Fistel sowie Tiere, die mit Probenecid vorbehandelt waren, zeigten im Vergleich zu den Normaltieren eine deutlich stärkere Ansprechbarkeit auf die gleiche Guancydindosis. 2 Std nach der Guancydingabe konnte zwischen den Blutdruckwerten der vorbehandelten Kollektive und dem mittleren Druckwert des Normalkollektivs eine hochsignifikante Differenz ermittelt werden (p〈0,001). Aus diesen Befunden wird gefolgert, daß Guancydin rasch durch die Nieren ausgeschieden wird und daß auf Grund der deutlichen Potenzierung der Guancydinwirkung durch Probenecid eine aktive Ausscheidung des Antihypertensivums in der Niere wahrscheinlich ist.
    Notes: Summary In anesthetized and vagotomized rats the effect of intraperitoneally injected guancydine on the mean arterial blood pressure and heart rate was observed over a time of 2 hrs. A dose-dependent hypotensive and heart rate lowering effect could be recorded. Nephrectomized animals or animals with bilateral ureteral ligature and ureteroabdominal fistula and animals, which were pretreated with probenecid, showed a significantly increased sensitivity to guancydine compared to the normal rats. 2 hrs after application of guancydine a highly significant difference could be observed between the mean blood pressure of the pretreated and the normal animals (p〈0.001). These results suggest, that guancydine is rapidly excreted through the kidneys, and that the secretion of this antihypertensive agent is an active process.
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  • 2
    ISSN: 1591-9528
    Keywords: Mean arterial blood pressure ; Heart rate ; Renal transport system ; Mittlerer arterieller Blutdruck ; Herzfrequenz ; Renales ; Transportsystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Ratten, die mit Furosemid oder Mefrusid vorbehandelt worden waren, wurde über einen Zeitraum von 2 Std die Wirkung von intraperitoneal injiziertem Guancydin (25 mg/kg) auf den mittleren arteriellen Blutdruck und die Herzfrequenz beobachtet. Im Vergleich zu nichtvorbehandelten Tieren konnte eine deutliche Potenzierung der blutdruck- und herzfrequenzreduzierenden Guancydinwirkung nachgewiesen werden. Der Effekt war dosisabhängig, da 2 Std nach der Guancydingabe die mit 25 mg/kg Furosemid oder 50 mg/kg Mefrusid vorbehandelten Tiere einen signifikant niedrigeren Blutdruck aufwiesen als diejenigen, die vorher 12,5 mg/kg Furosemid oder 25 mg/kg Mefrusid erhalten hatten (p〈0,01). Es konnte wahrscheinlich gemacht werden, daß die Ursache für diesen Effekt weniger in einer diuretikumbedingten Veränderung des Wasser- und Elektrolythaushalts als darin liegt, daß Furosemid, Mefrusid und Guancydin über dasselbe renale Transportsystem ausgeschieden werden. Als Ausdruck einer Konkurrenz der Substanzen um dieses Transportsystem kam es möglicherweise zu einer Verzögerung der Guancydinausscheidung und somit zu einer verstärkten Wirkung des Antihypertensivums auf den Blutdruck und die Herzfrequenz. Diese Auslegung der Ergebnisse wird außerdem dadurch bestätigt, daß in weiteren Versuchen der diuretische und natriuretische Furosemideffekt durch Vorbehandlung mit Guancydin signifikant herabgesetzt werden konnte (p〈0,01). Dieser Effekt war gleichfalls dosisabhängig.
    Notes: Summary In rats, which were treated, with furosemide and mefruside, the effect of intraperitoneally injected guancydine (25 mg/kg) on the mean arterial blood pressure and the heart rate was studied over a period of 2 hrs. In comparison with, normal animals, a significant potentiation of the depressant effect of guancydine on heart rate and blood pressure was observed. This effect was dose dependent, since the animals, which were pretreated with 25 mg/kg furosemide or 50 mg/kg mefruside, showed a significantly lower blood pressure than rats, which received 12,5 mg/kg furosemide or 25 mg/kg mefruside (p〈0.01). It is suggested, that the causes of these effects were not the saluretic-induced alterations of the water and electrolyte balance but the fact, that furosemide, mefruside and guancydine are excreted by the same renal transport system. These findings were strongly supported by the fact, that in other experiments pretreatment with guancydine significantly lowered the diuretic and natriuretic action of furosemide (p〈0.01). This effect was also dose dependent.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 193 (1991), S. 36-38 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Der Chitingehalt der Fruchtkörper (in einigen Fällen von Hüten und Stielen) einiger höherer Pilzarten aus verschiedenen Standorten von Ungarn wur-de untersucht. Es wurde festgestellt: l. DieAphyllophoraley-Arten, dies sind holzzerstörende, sogenannte xilo-phage Pilze, haben einen niedrigeren Chitingehalt. Die anderen (Boletales, Agaricales, Russulales) Arten zeigen einen signifikant höheren Chitingehalt (etwa 8–9%, bezogen auf Trockenmasse) in den Fruchtkörpern. 2. Die Unterschiede im Chitingehalt der verschiedenen Pilzgruppen werden nicht mit der unterschiedlichen systematischen Zugehörigkeit, sondern mit den verschiedenen Ernährungstypen (holzzerstörende, saprotrophe und Mykorrhizapilze) erklärt. Die holzzerstörenden Pilzarten haben einen signifikant niedrigen, die anderen einen höheren Chitingehalt. 3. Obwohl nur einige Hut- und Stielproben analysiert wurden, wurde in Hüten ein höherer, in Stielen ein niedrigerer Chitingehalt nachgewiesen. 4. Die Chitingehalte der untersuchten Pilzarten sind auch im Hinblick auf die Verdaulichkeit und damit die Verwendbarkeit der einzelnen, häufigen eßbaren Pilzarten bedeutsam.
    Notes: Summary The chitin content of fruit bodies (in some cases caps and stipes) of some higher fungi from different parts of Hungary have been analysed. The following results were obtained. 1. TheAphyllophorales species which are xilophagous, wood-rotting fungi, have a lower chitin content. The other species (Boletales, Agaricales, Russulales) have a significantly higher (8–9% of dry mass) chitin content in the fruit bodies. 2. The difference in chitin content of systematically different fungal groups can be explained by different types of nutrition (wood-rotting, saprotrophic and mykorrhiza fungi). The wood-rotting species have a significantly lower, the others a higher one. 3. Although only a few cap and stipe samples were analysed, in caps a higher chitin content was found and in stipes a lower one. 4. The chitin content of the in-vestigated fungal species is important information for the digestibility and use of some edible fungi.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 340 (1991), S. 51-57 
    ISSN: 1434-601X
    Keywords: 25.40.−h
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The production ofη-mesons in proton-nucleus reactions is analysed with respect to primary nucleon-nucleon (NN→NNη) and secondary pion-nucleon (πN→ηN) production processes on the basis of Hartree-Fock groundstate momentum distributions and free on-shell production processes. The folding model adopted compares well for meson production with more involved simulations based on VUU transport equations. Similar to K+ production in proton-nucleus reactions theη-mesons are primarily produced by theπN →ηN channel. However,η-mesons are absorbed in nuclei via excitation of the N* (1535) resonance which leads to strong distortions of the primordial spectra. On the other hand, the experimental mass dependence of the differential cross sections might yield information about the in-medium properties of this resonance.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 69 (1991), S. 841-841 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 69 (1991), S. 942-942 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 6 (1971), S. 311-312 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archives of environmental contamination and toxicology 6 (1977), S. 63-68 
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract The research was undertaken to analyze the uptake and distribution of cadmium-109 in mice following repeated injections and to observe how the simultaneous administrations of zinc affected the cadmium retention. Mice were given one, two, or three intravenous administrations at 48-hr intervals. Animals were sacrificed 2 min to 48 hr after each injection. Zinc had little effect on the retention of cadmium in the samples analyzed, and injections behaved independently of each other.
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  • 9
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
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  • 10
    ISSN: 1432-1041
    Keywords: Cushing's disease ; Mitotane ; o,p'-DDD ; long term treatment ; plasma monitoring ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary. Mitotane (o,p'-DDD) can be used for the treatment of various adrenocortical diseases such as Cushing's syndrome, but the usual doses of 6–8 g per day are often associated with severe adverse effects. This paper reports the results of much lower doses of o,p'-DDD (0.5–2 g per day) in two patients with Cushing's disease over periods of 8 and 5 years, respectively, under concomitant monitoring of the plasma levels of the parent drug and its major metabolite, o,p'-DDE. It became apparent that o,p'-DDD and o,p'-DDE have a strong tendency to accumulate in the body due to their high lipophilicity. As a consequence, changes in dose regimens had long lag times before they were reflected in plasma levels and once an increase or decrease had started one had to be careful not to cause overshoot. Steady state plasma levels of o,p'-DDD between 5–10 μg/ml appeared sufficient to induce and to maintain remission of the disease, which was accompanied with normal cortisol levels in plasma and urine. DDD-levels below 5 μg/ml for several weeks may lead to relapses, whereas DDD-levels over 10 μg/ml gave rise to side effects. On the other hand, o,p'-DDE seemed inactive at levels up to 4 μg/ml in plasma.
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