Search Results - (Author, Cooperation:M. G. Johnston)

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  1. 1
    C. Gutjahr ; E. Gobbato ; J. Choi ; M. Riemann ; M. G. Johnston ; W. Summers ; S. Carbonnel ; C. Mansfield ; S. Y. Yang ; M. Nadal ; I. Acosta ; M. Takano ; W. B. Jiao ; K. Schneeberger ; K. A. Kelly ; U. Paszkowski
    American Association for the Advancement of Science (AAAS)
    Published 2015
    Staff View
    Publication Date:
    2015-12-19
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Furans/*metabolism ; Hydrolases/genetics/*metabolism ; Mycorrhizae/*physiology ; Oryza/*enzymology/genetics/*microbiology ; Phosphates/metabolism ; Plant Proteins/genetics/*metabolism ; Pyrans/*metabolism ; Symbiosis/genetics/*physiology ; Transcription, Genetic
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Johnston, M. G. ; Gordon, J. L.

    [s.l.] : Nature Publishing Group
    Published 1981
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] In quiescent lymphatic segments, nanomolar concentrations of PGH2 increased the tone and elicited rhythmic contractions which decreased progressively in amplitude and frequency (Fig. la). The half life of PGH2 in aqueous medium at 37 AC is 5 min9. The stable endoperoxide analogue10 15-(5)-hydroxy-1 ...
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/293294a0

    Articles: DFG German National Licenses
  3. 3
    Johnston, M. G. ; Hay, J. B. ; Movat, H. Z.
    Springer
    Published 1976
    Staff View
    ISSN:
    1420-908X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01972237

    Articles: DFG German National Licenses
  4. 4
    Johnston, M. G. ; Hay, J. B. ; Movat, H. Z.
    Springer
    Published 1976
    Staff View
    ISSN:
    1420-908X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract The enhanced vascular permeability induced by histamine or bradykinin in the skin of the guinea-pig and rabbit was significantly augmented by small amounts of prostaglandins of the E type. When injected alone these prostaglandins had little effect on vascular permeability. Furthermore, E type prostaglandins were found to be more potent at inducing hyperemia than either histamine or bradykinin. Prostaglandin F2α did not enhance the vascular permeability induced by histamine or bradykinin nor did it produce hyperemia in the skin. In the rat, prostaglandins alone enhanced vascular permeability but they also increased the effect of histamine, serotonin and bradykinin. Using85Sr-microspheres to measure blood flow a correlation was found between the degree of hyperemia produced by prostaglandins and the degree to which they augmented enhanced vascular permeability due to histamine, serotonin or bradykinin. Prostaglandins therefore can directly mimic the hyperemia of the inflammatory process and can also modulate the changes in vascular permeability caused by other mediators of inflammation.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02026092

    Articles: DFG German National Licenses
  5. 5
    Atchison, D. J. ; Johnston, M. G.
    Springer
    Published 1996
    Staff View
    ISSN:
    1432-2013
    Keywords:
    Key words ANP ; Lymph pump ; Bovine lymphatic ducts
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract We investigated the hypothesis that atrial natriuretic peptide (ANP) attenuates lymph vessel pumping. In the present experiments, isolated bovine lymphatic vessels were cannulated at each end to create inflow and outflow ports for the administration of Krebs’ solution (vehicle) or ANP and for the measurement of fluid pumped by the vessel respectively. Once cannulated, the vessels were placed in a temperature-regulated bath circulated with oxygenated vehicle. Transmural pressure was regulated by the height of a fluid-filled reservoir. Lymph pump activity was assessed by measuring the volume of outflow every ten minutes. ANP was administered at concentrations of 0 (control), 0.1, 1.0, 10 and 100 nM. Data were expressed as a percentage of the value in the control period. When compared with vehicle, ANP produced a significant inhibition of lymph pump activity by 7.7% at 0.1 nM, 24.2% at 10 nM and 38.26% at 100 nM averaged over the hour for which the vessels were exposed to each concentration. Thus ANP inhibits lymph pumping concentration dependently. This may be yet another mechanism by which ANP exerts its haemodynamic effects.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s004240050043

    Articles: DFG German National Licenses
  6. 6
    Atchison, D. J. ; Johnston, M. G.
    Springer
    Published 1996
    Staff View
    ISSN:
    1432-2013
    Keywords:
    ANP ; Lymph pump ; Bovine lymphatic ducts
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract We investigated the hypothesis that atrial natriuretic peptide (ANP) attenuates lymph vessel pumping. In the present experiments, isolated bovine lymphatic vessels were cannulated at each end to create inflow and outflow ports for the administration of Krebs' solution (vehicle) or ANP and for the measurement of fluid pumped by the vessel respectively. Once cannulated, the vessels were placed in a temperature-regulated bath circulated with oxygenated vehicle. Transmural pressure was regulated by the height of a fluid-filled reservoir. Lymph pump activity was assessed by measuring the volume of outflow every ten minutes. ANP was administered at concentrations of 0 (control), 0.1, 1.0, 10 and 100 nM. Data were expressed as a percentage of the value in the control period. When compared with vehicle, ANP produced a significant inhibition of lymph pump activity by 7.7 at 0.1 nM, 24.2% at 10 nM and 38.26% at 100 nM averaged over the hour for which the vessels were exposed to each concentration. Thus ANP inhibits lymph pumping concentration dependently. This may be yet another mechanism by which ANP exerts its haemodynamic effects.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02191911

    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    1573-5036
    Keywords:
    Nitrogen cycling ; Nitrogen-15 tracer ; Split root experiments ; Triticum aestivum L. ; Wheat ; Xylem sap
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Summary One part of a split root system of wheat seedlings received full nutrient solution with15N-nitrate, the other received an identical solution with unlabelled nitrate. Appearance of labelled amino compounds was measured in the xylem sap exuding from roots not supplied directly with15N-nitrate after removal of the15N-nitrate-fed roots. This material indicates cycling of nitrogen from the shoots and through the roots. About 60 per cent of the nitrogen in the xylem appears to be cycling in this way.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02198115

    Articles: DFG German National Licenses