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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diabetologia 1 (1965), S. 131-132 
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Prednisolone ; rat ; glucose ; immunologically measurable insulin (IMI) ; glucose assimilation coefficient (K) ; correlation ; regression coefficient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resumé Les auteurs ont étudié chez des rats traités à la prednisolone après l'injection intraveineuse de glucose (50 mg/100 g poids) le comportement du glucose du sang et de l'insuline immunoréaetive du sérum. Trois groupes d'animaux ont reçu 10 mg d'Ultracorten-H par jour par voie souscutanée, l'un pendant 3 jours, l'autre pendant 7 jours et le troisième pendant 18 jours. En comparaison avec un groupe de rats non traités, seuls les rats traités pendant 7 jours ont montré une augmentation significative de la glycémie à jeun. Le coefficient d'assimilation glucidique restait dans les limites normales dans les trois groupes d'animaux traités. Mais dans ces trois groupes traités à la prednisolone on a trouvé des taux élevés d'insuline sérique à jeun et aussi une sécrétion d'insuline plus intense pendant l'épreuve d'hyperglycémie i.v. en comparaison avec le groupe de contrôle. Cet hyperinsulinisme ne semble pas être le résultat d'une hyperglycémie et n'est accompagné ni d'une réduction de l'assimilation du glucose ni d'une réactivité augmentée du pancréas endocrine envers le glucose. Nos résultats semblent indiquer un antagonisme périphérique entre les glucocorticoïdes et l'insuline, qui conduit à une sécrétion augmentée d'insuline pour maintenir l'équilibre du métabolisme glucidique.
    Abstract: Zusammenfassung Bei mit Prednisolon behandelten Ratten wurde das Verhalten von Blutzucker und immunologisch meßbarem Insulin (IMI) im Serum nach i. v. Glucosebelastung (50 mg/100 g Körpergewicht) untersucht. Drei Tiergruppen erhielten über einen Zeitraum von 3, 7 bzw. 18 Tage 10 mg/die Ultracorten-H subcutan. Im Vergleich zu einer Gruppe unbehandelter Kontrolltiere zeigten nur die Ratten des 7-Tage-Versuchs eine signifikante Erhöhung des Nüchternblutzuckers. Der Glucoseassimilations-Koefflzient (K) blieb bei allen drei behandelten Gruppen im Normbereich. Jedoch war bei allen drei Gruppen der Prednisolon-behandelten Tiere im Vergleich zur Kontrollgruppe sowohl ein erhöhter Nüehterninsulinspiegel als auch eine vermehrte Insulinsekretion nach der Glucosebelastung zu beobachten. Dieser Hyperinsulinismus scheint keine Folge einer Hyperglykämie zu sein und wird weder von einer Verminderung der Gmcoseassimilation noch von einer verstärkten Reaktivität des endokrinen tankreas gegenüber Glucose begleitet. Unsere Befunde sprechen für einen peripheren Antagonismus zwischen den Glucocorticoiden und Insulin, der, um den Kohlenhydratstoffwechsel im Gleichgewicht zu halten, zu einer vermehrten Insulinsekretion fuhrt.
    Notes: Summary The relationship between immunologically measurable insulin (IMI) in serum and the blood sugar was studied in the fasting state as well as after i.v. injection of glucose (50 mg / 100 g rat), in a group of untreated rats and in three groups of rats treated subcutaneously with 10 mg Prednisolone daily for 3, 7 and 18 days, resp. Only in the group of rats treated with Prednisolone for 7 days was there a significant increase in the fasting blood sugar; in all of the treated groups the glucose assimilation coefficient (K) remained within the normal range. The fasting insulin levels, however, showed a significant rise compared with the control group. After glucose loading in all the treated groups comparatively higher insulin values in blood were also observed. — This hyperinsulinism does not seem to be a result of hyperglycaemia, and is accompanied by neither a decreased assimilation of glucose nor an increase in the reactivity of the endocrine pancreas to glucose. Our findings are an indication of the existence of a peripheral antagonism between glucocorticoids and insulin, which leads to an increased secretion of insulin in order to maintain the equilibrium of the carbohydrate metabolism.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Diabetologia 5 (1969), S. 309-311 
    ISSN: 1432-0428
    Keywords: Galactose ; Insulin secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Le galactose provoque une sécrétion d'insuline aussi bien après administration orale qu'intraveineuse. La sécrétion d'insuline doit être attribuée à la transformation du galactose en glucose.
    Abstract: Zusammenfassung Galaktose ruft sowohl nach oraler als auch nach intravenöser Gabe eine Insulinsekretion hervor. Die Insulinsekretion wird durch die im Galaktose-katabolismus entstandene Glucose ausgelöst.
    Notes: Summary Following oral and intravenous galactose administration stimulation of pancreatic insulin secretion has been observed. It must be attributed to the conversion of galactose to glucose.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 43 (1965), S. 1000-1007 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Various methods for separating the free and the antibodybound (J 131-)hormone in order to perform a sensitive and precise radio-immunochemical assay of serum insulin concentration have been investigated. Human, porcine and bovine insulin were studied. The insulin was labelled in part in the own laboratory by means of Chloramin-T and NaJ131 and in part commercially availableJ 131-insulin preparations were used. Considerable degradation of the insulin following the labelling procedure withJ 131 has been observed, leading to non-specific binding of the degradation products to α2-serum globulins, which interfered with the assay. The removal of those degradation products by Sephadex G 75 filtration has been shown in detail. Separation of the free and the antibody-bound (J 131-)insulin has been achieved by means of agar electrophoresis and of anion-exchange resins (Dowex 1 and Amberlite CG-400 I). The latter technique yielded a sensitivity of 0.5–1µU insulin with a precision index ofλ 0.039. A mean fasting concentration of 22 ± 10µU Insulin per ml. has been determined in the serum of 30 normal subjects which in 8 cases rose to a maximum of 128µU insulin per ml. serum, 1 hour after 100 g glucose orally.
    Notes: Zusammenfassung Es wurden Verfahren zur Trennung des freien und antikörpergebundenen Jod131-Insulins für die radioimmunologische Insulinbestimmung mit Agargelelektrophorese und Anionenaustauschern (Dowex 1 und Amberlite) beschrieben. Verwendet wurde Jod131-Insulin vom Schwein, Rind und Menschen, das zum Teil nachGreenwood undHunter mit Chloramin T und NaJ131 selbst markiert wurde. Durch die Jod131-Markierung entstehen Verunreinigungen, die sich an α2-Globulin binden und durch einen besonderen Reinigungsprozeß mit Hilfe einer Sephadex-Säule abgetrennt werden müssen. Der Einfluß dieser Verunreinigungen sowohl auf das Meßergebnis als auch auf die Genauigkeit des radioimmunologischen Insulinbestimmungsverfahrens wird an typischen Beispielen demonstriert. Mit gereinigtem Jod131-Insulin und der Verwendung von Anionenaustauschern ergibt sich eine hohe Genauigkeit mit einem Index von 0,039. Im Nüchternserum von 30 Stoffwechselgesunden wurde ein mittlerer immunologisch reagierender Insulingehalt von 22 ± 10 µE/ml gemessen. Nach einer oralen Glucosebelastung (100 g p. o.) fand sich bei 8 Stoffwechselgesunden nach 60 min ein maximaler Anstieg bis auf 128 µE/ml.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    BBA - Enzymology 178 (1969), S. 93-99 
    ISSN: 0005-2744
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    BBA Section Nucleic Acids And Protein Synthesis 138 (1967), S. 411-420 
    ISSN: 0005-2787
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 122 (1967), S. 417-420 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 710-711 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The effect of administering to rats a diet lacking in phosphate on the levels of alkaline phosphatase, inorganic phosphate and a possible substrate of the enzyme, glycerol-1-phosphate, in the kidney, was investigated. The diet consisted of 25 per cent (w/w) fibrin hydro-lysate (5 per cent ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron Letters 28 (1987), S. 5165-5168 
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 25 (1996), S. 327-338 
    ISSN: 1573-1111
    Keywords: Maltoheptaose ; naproxen ; naproxen-maltoheptaose blends ; grinding ; crystallinity ; complexation ; thermal analysis ; X-ray diffractometry ; molecular modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The crystallinity of naproxen in solid combinations with amorphous maltoheptaose, the non-cyclic analog of β-cyclodextrin, was assessed using differential scanning calorimetry supported by X-ray powder diffractometry. Cogrinding induced a decrease in drug crystalinity to an extent which depended on the grinding time, and was most pronounced for the combination of equimolecular composition. Thermal analysis showed that the mechanism behind the conversion of crystalline naproxen into the amorphous state by cogrinding with maltoheptaose differed from that with randomly substituted, amorphous β-cyclodextrins. Interactions of naproxen with maltoheptaose in aqueous solution were studied by means of fluorescence spectroscopy, phase-solubility analysis, and computeraided molecular modelling. Maltoheptaose can wrap up naproxen, taking on a cyclic conformation and forming a ‘pseudo’ inclusion complex (apparent binding constant K1: 1 = 1.0 × 103 (−20%) L mol−1 at 25 °C) which is about as stable as the true inclusion complex with β-cyclodextrin in the lowest temperature range (0-100 K). A better complexing ability for naproxen in terms of binding constant values, however, was displayed by both native and derivatized β-cyclodextrins, the ‘hosts’ with covalently-bound cyclic structures.
    Type of Medium: Electronic Resource
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