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  • 1
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In 7 female dogs a constriction of the left renal artery was performed according to the Goldblatt technique. Four to 6 weeks after the operation the blood pressure of the dogs was increased. The total renin activity and the osmolality in the urine from the ischemic kidney were enhanced when compared to the urine from the contralateral untouched kidney. The sodium excretion of the clamped kidney was diminished. These results suggest that determination of urine renin activity might be useful in split-renal function studies for the diagnosis of human renovascular hypertension.
    Notes: Zusammenfassung Bei 7 weiblichen Hunden wurde mit einer Goldblatt-Klemme die linke Nierenarterie cingeengt. Der Blutdruck war 4–6 Wochen nach der Operation angestiegen. Im Urin der gedrosselten linken Niere fand sich eine niedrigere Natriumausscheidung als im Urin der rechten Niere. Die tierexperimentellen Untersuchungen lassen eine Bestimmung der Reninaktivität im Urin bei Patienten mit Verdacht auf eine hämodynamisch wirksame Nierenarterienstenose für sinnvoll erscheinen und könnten diagnostische Hinweise geben.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Plasma renin concentration in humans ; micromethod for plasma renin ; sheep angiotensinogen ; plasma renin concentration in babies ; Plasma-Renin-Konzentration beim Menschen ; Mikromethode zur Plasma-Renin-Bestimmung ; Schaf-Angiotensinogen ; Plasma-Renin-Konzentration bei Säuglingen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird ein einfaches, empfindliches Verfahren zur Bestimmung der Plasma-Renin-Konzentration beim Menschen beshrieben, das auf der von Boucheret al. [Canad. J. Physiol. Pharmacol.45, 881 (1967)] angegebenen Methode beruht. 1,0 ml Plasma, 1.0 ml Dowex 50WX2-(NH4)+ und Schaf-Angiotensinogen im Überschuß — gelöst in 2,0 ml EDTA- und NaN2-haltigem Trisphosphatpuffer — werden 15 Std bei 37°C inkubiert. Die Umsetzung des Human-Renins mit dem Schafsubstrat folgte einer Michaelis-Menten-Kinetik und ergab eine 1,5–2fach höhere Angiotensinausbeute als bei der entsprechenden Reaktion mit homologem Substrat. Die Präzision bei Doppelbestimmungen betrug 7,0±6,2% des kleineren Wertes. Die Angiotensin II-Wiederfindungsrate war in dem untersuchten Bereich von 25–200 ng linear und betrug im Mittel 84,4±10%. Bei gesunden Erwachsenen unter freier Kochsalzzufuhr wurde folgender Normbereich ermittelt: 0,9±0,6 ng Angiotensin/ml/h in Ruhe bzw. 2,1±1,0 ng/ml/h nach aktiver Orthostase. Bei gesunden Säuglingen betrug die Plasma-Renin-Konzentration unter ambulanten Bedingungen 3,4±1,6 ng/ml/h und war damit signifikant höher als die Normalwerte der Erwachsenen in Ruhe und nach Orthostase (P〈0,001).
    Notes: Summary A simple, sensitive method for determination of human plasma renin concentration is described. The procedure is based on the method of Boucheret al. [Canad. J. Physiol. Pharmacol.45, 881 (1967)]. One ml plasma and 1.0 ml Dowex 50WX2-(NH4)+ are incubated for 15 hours at 37°C with 150 mg sheep angiotensinogen in 2.0 ml trisphosphate buffer containing EDTA and NaN3. The reaction of the human renin with the sheep angiotensinogen followed the Michaelis-Menten kinetics and yielded a 1.5 to 2 fold amount of angiotensin compared to the reaction with homologous substrate; the recovery of angiotensin was 84.4±10% being linear in the range studied (25–200 ng angiotensin II). The normal values of 22 healthy adults during a free diet were 0.9±0.6 ng angiotensin/ml/h in recumbent and 2.1±1.0 ng/ml/h in upright posture. During ambulatory conditions the plasma renin concentration in healthy babies was 3.4±1.6 ng/ml/h. These values were significantly higher than those in adults in recumbent and upright posture (p〈0.001).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 10 (1970), S. 140-150 
    ISSN: 1432-1106
    Keywords: Electromyogram ; Postural Tremor ; Harmaline ; Rhizotomy ; Monkey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Rhizotomy of the dorsal roots of the upper limb in lesioned monkeys with lesioned-induced and harmaline-induced tremor caused complete anaesthesia and akinesia of the corresponding limb, which only showed purposeless movements. The rate and rhythm of postural tremor and the reciprocality of the bursts in opposite muscles were not affected by the rhizotomy; the incidence of tremor episodes was greater in some animals. Rhizotomy apparently interfered with the amplitude of the bursts which, at times, was less regular in the deafferented limb. In four out of six animals the rhizotomy involved the blood supply of the dorsal part of the lateral column. This caused a degeneration of the corresponding lateral corticospinal and dorsal spinocerebellar tracts, producing a weakness of the ipsilateral lower limb which gradually improved. Faster bursts (12–13/sec) were also noted on the EMG in response to harmaline in monkeys with cerebellar lesions. These findings suggest that the influence transmitted through the spinal dorsal roots does not play an important role in initiating postural tremor. The rate and rhythm of tremor episodes are uninfluenced by impulses transmitted through the dorsal roots which, however, apparently exert a stabilizing effect on the amplitude of the bursts.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 19 (1972), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 326-328 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: X-ray powder data for the compound U3Si have been obtained from an alloy prepared by arc melting uranium and silicon followed by a 7 day anneal at 800°C. The d spacing determinations have been extended into the back reflection to a 2&thgr; value of 167.4 °. The observed relative intensities are compared with calculated values.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Nach einseitiger Drosselung der Nierenarterie beim Hund fanden sich höhere Renin-Aktivität und Norepinephrin-Konzentration im Urin der ischämischen Niere als im Urin der Gegenseite. In der Rinde der gedrosselten Niere waren Renin-Aktivität und Granulationsindex der juxtaglomerulären Zellen höher als in der Rinde der ungeklemmten Niere, während der Natriumgehalt niedriger war.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 29 (1973), S. 285-286 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé La surrénalectomie bilatérale chez des rats uninéphrectomisés produit une augmentation très marquée de la concentration de rénine plasmatique, ainsi que de l'activité de la G6PD dans la macula densa. Cependant, malgré une diminution de la granularité des cellules juxtaglomérulaires, on n'observe aucune modification du contenu en rénine du rein. Ces observations indiquent que, dans cette condition expérimentale, le rein qui reste est capable de réagir avec forte augmentation de la sécrétion de rénine.
    Type of Medium: Electronic Resource
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