Library

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 88 (1966), S. 5473-5478 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 90 (1968), S. 3567-3569 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 23-29 
    ISSN: 1432-1440
    Keywords: Renale Hypertonie ; Entfernung einer Nierenarterienstenose ; Renaler Salz- und Flüssigkeitsverlust ; Renin-Angiotensin System ; Renal hypertension ; Removal of one artery stenosis ; Salt and fluid loss ; Renin-angiotensin system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The effect of removal of one renal artery stenosis on renal sodium and fluid excretion and on the activity of the renin-angiotensin system (RAS) has been investigated in three types of renal hypertension of rats. Blood pressure fell in all experimental models after declamping, independently of changes in urinary sodium and water excretion or plasma angiotensin II (ANG II). Plasma concentrations of ANG II did not rise in response to salt and fluid loss induced by declamping when the contralateral kidney had been removed or when it was depleted from renin. A high renin content of the declamped kidney prevented major salt and fluid loss, whereas renin depletion of this kidney was accompanied by an exaggerated natriuresis and diuresis. Besides this tubular modulation of renal salt and water handling by the local RAS, glomerular filtration rate could be reduced by a stimulated activity of this system in plasma, indicated by a close relationship between serum urea and plasma ANG II levels.
    Notes: Zusammenfassung An drei verschiedenen Modellen des renalen Hochdrucks der Ratte wurde der Einfluß der Entfernung einer Nierenarterienstenose auf die renale Salz- und Wasserausscheidung, die Aktivität des Renin-Angiotensin Systems und die Höhe des Blutdrucks untersucht. Der erhöhte Blutdruck fiel nach Entklammerung in allen Modellen auf Normalwerte ab, unabhängig von den ausgeschiedenen Mengen an Salz und Flüssigkeit und den Änderungen der Plasma Angiotensin II Konzentrationen. Dabei wurden stimulierte Werte für Angiotensin II im Plasma als Folge des Salz- und Flüssigkeitsverlustes nach Entklammerung nur dann beobachtet, wenn die kontralaterale Niere nicht zuvor bereits entfernt oder reninverarmt war. Der plötzliche Anstieg des renalen Perfusionsdruckes nach Entfernung der Stenose führte zu starken Salz- und Flüssigkeitsverlusten, wenn der Reningehalt der betreffenden Niere gering war, während ein hoher Nierenreningehalt mit einer verringerten Elektrolyt- und Wasserausscheidung einherging. Neben dieser tubulären Modulation der renalen Salz- und Wasserausscheidung durch das lokale Nierenrenin-Angiotensin System kann die Stimulation dieses Systems im Plasma über Veränderungen der glomerulären Filtrationsrate die Nierenfunktion beeinflussen. Dies wird deutlich in Situationen, die mit renalem Salz- und Wasserverlust einhergehen; dabei finden sich enge Beziehungen zwischen der Höhe der Plasma-Harnstoff- und der Angiotensin II Werte.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1440
    Keywords: Angiotensin II ; Diabetes insipidus Ratten ; Antidiurese ; SQ 14 225 ; Furosemid ; Angiotensin II ; Diabetes insipidus rats ; Antidiuresis ; SQ 14225 ; Furosemide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Brattleboro rats homozygous for hypothalamic hereditary diabetes insipidus (DI rats) were used to investigate the following questions: a) Do exogenous and endogenous angiotensin II (AII) have an antidiuretic effect in diabetes insipidus? b) Does AII mediate the antidiuresis induced by furosemide? The following results were obtained: 1. AII (5 mg/kg s.c. in oil) and furosemide (50 mg/kg i.p.) decreased urine flow and increased urinary sodium excretion. Furosemide led to a two-fold increase of AII plasma concentrations and a decrease of plasma sodium levels. 2. SQ 14 225 (2×2.5 mg/kg p.o.), an angiotensin I-converting enzyme inhibitor, led to an increase of urine flow and to a slightly elevated urinary sodium excretion. 3. When the formation of AII was blocked by SQ 14 225 (2×2.5 mg/kg p.o.), AII plasma concentrations were 2.5-fold decreased, but furosemide still reduced urine flow. We conclude that plasma AII might have an antidiuretic action in DI rats. However, AII does not mediate the antidiuresis induced by furosemide.
    Notes: Zusammenfassung Bei Brattleboro-Ratten mit hereditärem hypothalamischen Diabetes insipidus (DI Ratten) wurden folgende Fragen untersucht: a) Wirken exogenes and endogenes Angiotensin II (AII) antidiuretisch bei Diabetes insipidus? b) Vermittelt AII den antidiuretischen Effekt von Furosemid? Ergebnisse: 1. AII (5 mg/kg s.c. in Ö1) und Furosemid (50 mg/kg i.p.) verminderten die Urin- und erhöhten die renale Natriumausscheidung. Furosemid führte zu einem zweifachen Anstieg der AII Plasma Konzentration und zur Verminderung der Plasma-Natrium Konzentration. 2. SQ 14 225 (2×2,5 mg/kg p.o.), ein Hemmer des Angiotensin I Converting Enzym, führte zu einer Zunahme der Urin- und der renalen Natriumausscheidung. 3. Auch wenn die Bildung von AII mit SQ 14 225 (2×2,5 mg/kg p.o.) blockiert wurde, reduzierte Furosemid die Urinausscheidung, obwohl die AII Plasma Konzentration 2,5fach vermindert war. Wir schließen daraus, daß Plasma AII bei DI Ratten antidiuretisch wirken kann. Allerdings vermittelt AII nicht den antidiuretischen Effekt von Furosemid.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-1440
    Keywords: Balloon valvuloplasty ; Aortic stenosis ; Pulsed Doppler
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Percutaneous transluminal valvuloplasty (PTV) was performed in 24 patients (aged 67–86 years, mean: 76±5.7 years) with calcific aortic stenosis and high operative risk. The gradient between maximal left ventricular and aortic pressures (peak-to-peak gradient, PPPG) could be reduced by 52% from 73±21 to 34±12 mmHg (p〈0.001). Peak pressure gradient (PPG), as assessed by continuous wave Doppler, could be reduced from 80±28 to 58±21 mmHg (p〈0.001). Aortic valve area (AVA) as determined by Doppler and two dimensional echocardiography increased significantly from 0.39±0.14 to 0.61±0.3 cm2 (p〈0.05). Clinical symptoms were found to be improved in 5 of 8 patients with impaired ejection fraction and in 11 of 16 patients with normal ejection fraction during the first week after PTV. Complications due to the procedure were surgical revision of femoral artery puncture site in one patient and hemodynamic relevant pericardial effusion in another patient. Transmitral early (E) and late (L) diastolic filling integrals were measured by pulsed Doppler: the ratio E/L decreased significantly after PTV from 0.9±0.5 to 0.63±0.31 (p〈0.03) indicating further reduction of left ventricular early diastolic filling. Ejection fraction, stroke volume and cardiac output did not significantly change immediately after PTV. The results indicate, that PTV can successfully reduce aortic pressure gradients and improve symptoms in patients with calcific aortic stenosis and high operative risk. Doppler echocardiography provides an adequate method to noninvasively evaluate the initial outcome of PTV and seems valuable for the assessment of long term results.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 87-90 
    ISSN: 1432-1440
    Keywords: β-Rezeptorenblocker ; peripherer Widerstand ; β 1-Selektivität ; β-adrenergic blocking agents ; Peripheral resistance ; β 1-selectivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The effects of the beta-adrenergic blocking agents propranolol, pindolol, atenolol, bunitrolol, and methypranol on the vascular resistance of isolated perfused hindlimbs of rats were investigated. At concentrations of 0.01 µg/ml in the perfusate dl-propranolol und pindolol significantly increased vascular resistance by blockade ofβ 2-receptor mediated vasodilatation, whereas atenolol, bunitrolol and methypranol had no effect on peripheral resistance at this concentration. With increasing concentrations up to 10 µg/ml all drugs, with the exception of atenolol, caused vasodilatation. We conclude that the specificity of beta-blocking agents can be established in the isolated perfused hindlimb vasculature of rats through its effect on vascular resistance. The lack of inhibition of vascularβ 2-receptors at low concentrations of atenolol and also bunitrolol and methypranol show relative selectivity forβ 1-receptors. The differential effects ofβ-adrenergic agents on vascular resistance may have significance for the clinical use of the drugs.
    Notes: Zusammenfassung Untersucht wurde der Einfluß derβ-Rezeptorenblocker Propranolol, Pindolol, Atenolol, Bunitrolol und Methypranol auf den Gefäßwiderstand der isoliert perfundierten Hinterextremität der Ratte. Bei einer Konzentration von 0,01 µg/ml im Perfusat erhöhten dl-Propranolol und Pindolol den Widerstand deutlich, da die durchβ 2-Rezeptoren vermittelte Vasodilatation ausgeschaltet wurde. Atenolol, Bunitrolol und Methypranol hatten dagegen bei dieser Konzentration keinen Einfluß auf den peripheren Widerstand. Mit steigenden Konzentrationen bis zu 10 µg/ml wirkten alle Pharmaka mit Ausnahme von Atenolol vasodilatatorisch. Wir folgern, daß die Selektivität derβ-Rezeptorenblocker in der isoliert perfundierten Hinterextremität der Ratte durch ihren Effekt auf den Gefäßwiderstand festgestellt werden kann. Wie Atenolol zeigen auch Bunitrolol und Methypranol relative Selektivität fürβ 1-Rezeptoren, da sie in niedrigen Konzentrationen die vaskulärenβ 2-Rezeptoren nicht beeinflussen. Der unterschiedliche Einfluß derβ-Rezeptorenblocker auf den Gefäßwiderstand könnte für die klinische Anwendung der Medikamente Bedeutung haben.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 131-138 
    ISSN: 1432-1440
    Keywords: Sympathische Aktivität ; Plasma Noradrenalin ; Adrenalin ; Dopamin ; Gefäßreaktivität ; Uptake Aktivität ; Genetische Hypertonie ; Sympathetic activity ; Plasma noradrenaline ; Adrenaline ; Dopamine ; Vascular reactivity ; Uptake activity ; Spontaneous hypertension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Differences in sympathetic vascular tone between Wistar Kyoto rats (WKR) and stroke prone spontaneously hypertensive rats (spSHR) were determined by comparing the following parameters: sympathetic activity was evaluated by determinations of plasma catecholamines (noradrenaline, adrenaline, dopamine) combined with the measurement of the neuronal and extraneuronal uptake of noradrenaline using an isolated rat heart preparation. The responsiveness of vascular smooth muscle to vasopressor agents was tested in the isolated perfused hindlimb preparation. At the age of 5, 12, 15, and 28 weeks sympathetic nervous activity was significantly higher in spSHR than in WKR since plasma noradrenaline was elevated by almost 50% in the presence of an unaltered activity of the uptake mechanisms. The responsiveness of vascular smooth muscle to noradrenaline was markedly enhanced in spSHR. Besides increased maximal vasoconstriction in response to BaCl2 (20 mmol/l) after potassium chloride depolarization or supramaximal doses of noradrenaline (10−3 mol/l), a supersensitivity of vascular smooth muscle to noradrenaline could also be detected in spSHR (age 5 weeks). The threshold dose and the ED50 were reduced by 25% in spSHR in response to noradrenaline infusions. No changes in threshold or ED50 were found in response to potassium chloride depolarization. The stimulated sympathetic activity in spSHR and the increased responsiveness of resistance vessels to noradrenaline, both contribute to the rise in sympathetic vascular tone. The finding of an increased sympathetic vascular tone in very early stages of hypertension suggest that this factor, producing a primary increase in total peripheral resistance underlies the development of high blood pressure in spSHR.
    Notes: Zusammenfassung Unterschiede des sympathischen Gefäßtonus zwischen spontan hypertonen Ratten (spSHR) und Wistar Kyoto Ratten (WKR) wurden an Hand folgender Größen erfaßt: Die sympathische Aktivität wurde ermittelt durch die Bestimmung der Plasmakatecholamine (Noradrenalin, Adrenalin und Dopamin) bei gleichzeitiger Messung der neuronalen und extraneuronalen Wiederaufnahme von Noradrenalin im isolierten Präparat (Langendorff Herz). Die Ansprechbarkeit glatter Gefäßmuskulatur auf vasopressorische Substanzen wurde in der isoliert perfundierten Hinterextremität der Ratte gemessen. Die sympathische Aktivität war bei spSHR im Alter von 5, 12, 15 und 28 Wochen gesteigert, da die Konzentration von Noradrenalin im Plasma um 50% bei unveränderter neuronaler und extraneuronaler Wiederaufnahme erhöht war. Die Ansprechbarkeit der glatten Gefäßmuskulatur gegenüber Noradrenalin war bei spSHR verstärkt. Neben einer stärkeren maximalen Vasokonstriktion nach supramaximalen Dosen von Noradrenalin (10−3 mol/l) oder BaCl2 (20 mmol/l) fand sich eine spezifische Überempfindlichkeit der einzelnen glatten Muskelzelle gegenüber Noradrenalin bei 5 Wochen alten spontan hypertonen Ratten. Während nach Kaliumdepolarisation keine Unterschiede in der Schwellendosis oder der ED50 auftraten, waren diese bei spSHR für die Noradrenalin-induzierten Widerstandserhöhungen um 25% vermindert. Die stimulierte sympathische Aktivität sowie die erhöhte Ansprechbarkeit der Widerstandsgefäße gegenüber Noradrenalin bei spSHR sind Ursache des gesteigerten sympathischen Gefäßtonus, der über eine Erhöhung des peripheren Widerstandes die Entwicklung des hohen Blutdrucks bei der genetischen Hypertonie der Ratte verursacht.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Chromosoma 15 (1964), S. 591-605 
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The heterochromosomes of crane-flies (Tipulidae) are sex chromosomes (XY in males), as could be demonstrated by the sex limited inheritance of Y-autosome translocations in Tipula oleracea, Pales crocata and P. ferruginea. 2. Like the majority of tipulids the species more closely studied in the present contribution, P. ferruginea, possesses 3 pairs of large autosomes and small XY chromosomes, which are heteromorphic. 3. The normal strain of P. ferruginea contains two types of size-different X-chromosomes, Xl and Xk, of a length ratio of 1∶1,4. They show normal mendelian inheritance and are viable in all combinations. X-chromosomes of different length have also been observed in Tipula paludosa and T. oleracea. 4. Triploid larvae with normal spermatogenesis have been found in Tipula paludosa, Pales lunulicornis, and P. ferruginea. The triploid individuals of the two Pales species possess the sex-chromosome combination XXY. 5. In P. ferruginea a strain with supernumerary sex chromosomes has been found. In crosses of XYY males of this strain with normal XX females, besides XX females, XY and XYY males, also XXY males occur which are fertile. Their occurrence proves the existence of an epistatic male determining factor (or factors) in the Y. Presence or absence of Y thus is responsible for sex realisation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0942-0940
    Keywords: Glioblastoma multiforme ; malignant glioma ; astrocytoma III–IV ; extracranial metastases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors describe two rare cases of extraneural metastases of glioblastoma multiforme and of astrocytoma III–IV, but with different distribution routes. In the first case—astrocytoma III–IV—via the lymphatic system, with metastases in the cervical lymph nodes; in the second case—glioblastoma—via the blood system, with metastases in the sternum and vertebrae. Survival times were 18 months in the astrocytoma case (operation plus irradiation), and 6 months in the glioblastoma case (operation, irradiation, and chemotherapy). The discussion deals with the possible paths of the metastases, the connection between metastatic spread and survival time (in the longer surviving patient the metastases were discovered together with the recurrence), and problems in deciding the individual therapy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 65 (1982), S. 167-173 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The combination of chemotherapy and irradiation for the treatment of malignant intracerebral tumours is increasing, and survival times longer than those after monotherapy are reported. The suitability of simultaneous radio-chemotherapy using BCNU-Bleomycin, a regimen in which has been followed 38 patients of this hospital (up to 31 December 1981) is critically discussed. Statistics of 30 patients with treatment ended by 31 December 1980 and case histories of two patients with fatal complications, aspergillosis in the one and necrotizing colitis in the other, are presented. The value of the various agents used for chemotherapy is discussed with respect to the survival rates and observed side effects in all the patients. The use of Bleomycin is questioned.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...