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  • Electronic Resource  (2)
  • Polymer and Materials Science  (1)
  • Soil heterogeneity  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Soil partitioning effect of an earthworm burrow system (1987)
    Springer
    Biology and fertility of soils 3 (1987), S. 121-124 
    Details
    ISSN: 1432-0789
    Keywords: Earthworm ; Aporrectodea, sp. ; Burrows ; Simulation ; Soil heterogeneity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Through the simulation of an earthworm burrow system and the calculation of the shortest pathway from the bottom of the system to the surface, using a succession of burrows, it is shown that the borrow system leads to a partition of soil space. The characteristics of the resulting heterogeneity, the size of this partitioning and the length of the shortest pathways are discussed with regard to the functional relationship between the burrow system and the soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260592
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Permeationsuntersuchungen an stabilisierten Schaumlamellen (1979)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 426-431 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The time-dependence of the permeation of methanol vapour through tenside-alginate foam lamels was determined by measuring the permeation, diffusion and solubility coefficients. Steady-state transport was found to occur only within narrow time limits. The agreement of calculated and experimental relationships between the coefficients suggest solution diffusion as proposed by BARRER. The transport mechanism can be explained by the place exchange theory and by the cluster theory according to LUCK.
    Notes: Für Tensid/Alginat-Schaumlamellen wurde der Durchtritt von Methanoldampf an Hand der Permeations-, Diffusions-und Löslichkeitskoeffizienten in Abhängigkeit von der Zeit ermittelt. Stationäre Transportzustände existieren nur in engen Zeitintervallen. Aus der Übereinstimmung zwischen den berechneten und experimentell ermittelten Koeffizienten-Beziehungen wird auf eine Lösungsdiffusion nach BARRER geschlossen. Der Transportmechanismus kann auf der Grundlage der Platzwechseltheorie sowie der Cluster-Theorie nach LUCK gedeutet wurden.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1979.010300710
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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