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  • 1
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Electrochimica Acta 11 (1966), S. 389-400 
    ISSN: 0013-4686
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Electrochimica Acta 11 (1966), S. 495-506 
    ISSN: 0013-4686
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 48 (1970), S. 1005-1006 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In 12 randomized clinic patients the influence of exogenous glucagon on gastric acid secretion in induced acute hypercalcemia was examined. Statistical analysis of the quantitative secretion studies showed a significant inhibition of parietal cell secretion in acute hypercalcemia by exogenous glucagon. Since the effect of acute hypercalcemia is at least partially mediated by liberation of gastrin in the antral mucosa it is suggested that glucagon inhibits liberation of gastrin and/or the effect of gastrin at the parietal cell.
    Notes: Zusammenfassung Bei 12 unausgewählten Klinikpatienten wurde der Einfluß von exogenem Glucagon auf die gastrale HCl-Sekretion bei induzierter akuter Hypercalcämie geprüft. Die statistische Analyse der Ergebnisse der quantitativen Magensekretionsanalysen ergab eine signifikante Hemmung der Belegzell-Sekretion bei akuter Hypercalcämie durch exogenes Glucagon. Da der Effekt akuter Hypercalcämie zumindest teilweise durch Freisetzung von Gastrin in der Antrumschleimhaut vermittelt wird, darf angenommen werden, daß Glucagon die Freisetzung von Gastrin und/oder die Wirkung von Gastrin an der Belegzelle inhibiert.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 49 (1971), S. 56-57 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 13 unausgewählten Klinikpatienten wurde der Einfluß von Theophyllin auf die durch Pentagastrin submaximal stimulierte gastrale HCl-Sekretion geprüft. Die statistische Analyse der Untersuchungsergebnisse ergab, daß Theophyllin die durch Pentagastrin stimulierte Sekretion der Elektrolyte H+, Cl− und K+ signifikant steigert. Dieser Effekt kann als Indiz dafür angesehen werden, daß die Wirkung von Pentagastrin durch zAMP vermittelt wird. Bevor dieser Wirkungsmechanismus als gesichert angesehen werden kann, sind weitere Untersuchungen erforderlich.
    Notes: Summary In 13 randomly chosen patients of our clinic, the effects of theophylline on gastric acid secretion was studied after submaximal pentagastrin stimulation. Statistical analysis of the results showed that theophylline significantly increases the secretion of the electrolytes H+, Cl− and K+. This effect on electrolyte secretion already stimulated by pentagastrin may be interpreted as evidence that the effect of pentagastrin is mediated by cyclic AMP. Further investigations aren/necessary to support this hypothesis.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of sol gel science and technology 13 (1998), S. 81-84 
    ISSN: 1573-4846
    Keywords: acid-catalyzed silica sols ; aging ; structural development ; dynamic light scattering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Dynamic light scattering experiments in acid-catalyzed silica sols are discussed. It is shown that in spite of limited parameter accuracy and limited absolute knowledge of the particle sizes, the scattering data from various experiments are comparable with one another and give information about structural differences. Measurements at various angles indicate changes between non-spherical and nearly spherical particles and allow the estimation of gelling times before gelation.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1612-1112
    Keywords: Silica surface ; Electrophoretic mobility ; Metal impurities ; Zero point of charge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Electrophoretic mobility measurements in the pH 2‐10 range are described for several commercial HPLC silica microparticles and a laboratory-produced product. The content of metal impurities for the silicas was also determined by AAS. An acidic/hydrothermal treatment was used to generate a more homogenous surface for some of the silicas. The zero points of charge (zpc) for both a native and a treated silica plus several commercial HPLC silicas were compared. The electrophoretic mobility method may be useful in predicting the utility of certain types of silica supports for chromatographic separations.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 549 (1987), S. 204-212 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of Aluminium(III) with 7-Iod-quinoline-8-ol-5-sulfonic Acid (Ferron) in Aqueous SolutionUnder the conditions of the aluminium-Ferron reaction the complex AlL2- is formed. The improvement of the kinetic method allows the exact investigation of the time range t ≤ 2 min in which according the hitherto interpretation only monomer aluminium(III) species should react with Ferron. A change in the direction of the plot in the lg (E∞ - Ei)/t-diagram at pH ≥ 4 can be explained with the participation of dimers in the reaction. The existence of a general base catalyse has been detected, a reaction model is described.
    Notes: Unter den Bedingungen der Aluminium-Ferron-Reaktion wird der Komplex AlL2- gebildet. Die Verbesserung der kinetischen Meßmethodik gestattete die exakte Untersuchung des Zeitbereiches t≤2 min, in dem nach bisheriger Meinung nur monomere Al(III)-Spezies mit Ferron reagieren sollten. Das Auftreten eines Knickes im Kurvenverlauf des lg (E∞ - Ei)/t-Diagramms bei pH ≥ 4 wird durch die Einbeziehung Dimerer in die Reaktion verständlich. Das Vorliegen einer allgemeinen Basenkatalyse wird nachgewiesen und ein Reaktionsmodell beschrieben.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Publication Date: 2015-07-09
    Description: Severe invasive infectious diseases remain a major and life-threatening health problem. In serious cases, a systemic activation of the coagulation cascade is a critical complication that is associated with high mortality rates. We report here that streptokinase, a group A streptococcal plasminogen activator, triggers the activation of the human contact system. Activation of contact system factors at the surface of the Streptococcus pyogenes serotype M49 is dependent on streptokinase and plasminogen. Our results also show that secreted streptokinase is an efficient contact system activator, independent from a contact surface. This results in the processing of high-molecular-weight kininogen and the release of bradykinin, a potent vascular mediator. We further investigated whether the ability of 50 different clinical S. pyogenes isolates to activate the contact system is associated with an invasive phenotype. The data reveal that isolates from invasive infections trigger an activation of the contact system more potently than strains isolated from noninvasive infections. The present study gives new insights into the mechanisms by which S. pyogenes triggers the human contact system and stresses the function of soluble and surface located plasmin exploited as a group A streptococcal virulence factor through the action of streptokinase.
    Print ISSN: 0019-9567
    Electronic ISSN: 1098-5522
    Topics: Medicine
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  • 10
    Publication Date: 2015-07-29
    Description: Background It is well recognized that right ventricular apical pacing can have deleterious effects on ventricular function. We performed a head-to-head comparison of the SafeR pacing algorithm versus DDD pacing with a long atrioventricular delay in a heterogeneous population of patients with dual-chamber pacemakers. Methods and Results In a multicenter prospective double-blinded randomized trial conducted at 10 centers in Canada, 373 patients, age 71±11 years, with indications for dual chamber DC pacemakers were randomized 1:1 to SafeR or DDD pacing with a long atrioventricular delay (250 ms). The primary objective was twofold: (1) reduction in the proportion of ventricular paced beats at 1 year; and (2) impact on atrial fibrillation burden at 3 years, defined as the ratio between cumulative duration of mode-switches divided by follow-up time. Statistical significance of both co-primary end points was required for the trial to be considered positive. At 1 year of follow-up, the median proportion of ventricular-paced beats was 4.0% with DDD versus 0% with SafeR ( P 〈0.001). At 3 years of follow-up, the atrial fibrillation burden was not significantly reduced with SafeR versus DDD (median 0.00%, interquartile range [0.00% to 0.23%] versus median 0.01%, interquartile range [0.00% to 0.44%], respectively, P =0.178]), despite a persistent reduction in the median proportion of ventricular-paced beats (10% with DDD compared to 0% with SafeR). Conclusions A ventricular-paced rate 〈1% was safely achieved with SafeR in a population with a wide spectrum of indications for dual-chamber pacing. However, the lower percentage of ventricular pacing did not translate into a significant reduction in atrial fibrillation burden. Clinical Trial Registration URL: https://www.clinicaltrials.gov/ Unique identifier: NCT01219621.
    Electronic ISSN: 2047-9980
    Topics: Medicine
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