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  • 1980-1984  (4)
  • Forest  (2)
  • Antidepressant activity  (1)
  • Community matrix  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The effects of tranylcypromine isomers on norepinephrine-H3 metabolism in rat brain (1980)
    Springer
    Psychopharmacology 69 (1980), S. 193-199 
    Details
    ISSN: 1432-2072
    Keywords: Tranylcypromine isomers ; Norepinephrine-H3 metabolism ; Monoamine oxidase ; Norepinephrine depletion ; Antidepressant activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of d- and l-tranylcypromine on the disposition and metabolism of intracisternally administered l-norepinephrine-H3 were studied in rat brain. Both isomers inhibited the deamination of norepinephrine-H3. However, d-tranylcypromine was considerably more potent than the l-isomer in this respect. In addition, the l-isomer of tranylcypromine was found to enhance the disappearance of endogenous and tritiated norepinephrine from brain. Although this action appeared to result from an increase in catecholamine release, the possibility of uptake inhibition could not be eliminated. The l-isomer of tranylcypromine enhanced the disappearance of norepinephrine-H3 from brain when administered both 20 and 90 min following intracisternal injection of the label. Comparable doses of d-tranylcypromine did not exhibit this effect. Larger increases in brain levels of normetanephrine-H3 were produced by d,l-tranylcypromine than by either the d- or l-isomer alone, indicating that the racemic mixture may produce the greatest increase in the interaction of norepinephrine with its postsynaptic receptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427649
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The community matrix in three species community models (1982)
    Springer
    Journal of mathematical biology 16 (1982), S. 25-31 
    Details
    ISSN: 1432-1416
    Keywords: Stability ; Community matrix ; Lotka-Volterra models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The explicit function of the community matrix of a three dimensional Lotka-Volterra model is delineated by a set of necessary and sufficient conditions for a positive equilibrium to be asymptotically stable. In the special case that the community matrix is quasi weakly diagonally dominant, it is shown that a positive determinant for the community matrix is not only necessary but is also sufficient for stability. The results are specific to three dimensional models and do not extend to communities of dimension greater than three.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275158
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of mycorrhizal inocula on the growth of Sitka spruce seedlings in different soils (1983)
    Springer
    Plant and soil 71 (1983), S. 313-317 
    Details
    ISSN: 1573-5036
    Keywords: Forest ; Glasshouse conditions ; Mycorrhizal fungi ; Nursery ; Seedling response ; Sitka spruce
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Different mycorrhizal fungi were tested for their effectiveness in promoting growth of Sitka spruce seedlings, in two contrasting soils, in a glasshouse pot experiment. In nursery soil,Laccaria amethystina significantly improved growth of seedlings in comparison toL. laccata. Seedlings inoculated with a forest isolate ofThelephora terrestris were significantly larger than those inoculated with a nursery isolate when grown in forest soil. The effectiveness ofComplexipes moniliformis in forest soil was poor in comparison to other mycorrhizal fungi. Strains aswell as species of mycorrhizal fungi affect seedling growth differently. These effects are further influenced by soil type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182669
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Changes in the mycorrhizal status of Sitka spruce following outplanting (1983)
    Springer
    Plant and soil 71 (1983), S. 319-323 
    Details
    ISSN: 1573-5036
    Keywords: E-strain ; Forest ; Nursery ; Replacement ; Sitka spruce ; Thelephora terrestris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Occurrence of mycorrhizal types in 4 forest sites and 4 nurseries was determined by mycorrhizal morphology. In total 25 distinct mycorrhizas were found, of which 14 were formed by identifiable fungi. The frequency of occurrence of the ‘E-strain’ fungus, the dominant nursery mycorrhizal fungus, decreases with the age of the outplanted seedling. Some mycorrhizal types were found in all the mature forest sites examined. The fungusT. terrestris was found on all age groups of Sitka spruce studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182670
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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