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  • Chemistry  (1)
  • Evaporation  (1)
  • Canopy conductance
  • Heterosis
  • 1995-1999  (1)
  • 1950-1954  (1)
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Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Environmental regulation of surface conductance for evaporation from vegetation (1995)
    Springer
    Plant ecology 121 (1995), S. 79-87 
    Details
    ISSN: 1573-5052
    Keywords: Canopy ; Evaporation ; Leaf area index ; Scaling ; Surface conductance ; Stomata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We examine conductances for evaporation from both vegetation and soil in response to environmental variables. Data from a vertically-structured pristine forest of Nothofagus are presented as an example of the effects of biodiversity on the scaling of conductances between tiers of plant organisation. Available data sets of maximum leaf stomatal conductances (g lmax ) and bulk vegetation surface conductances (G smax ) are compared. Overall, the ratio G smax /g lmax is consistently close to 3 for seven major vegetation types of diverse structure. An analytical model accounts for this close relationship, and in particular how G smax is conservative against changes in leaf area index because of the compensating decrease in plant canopy transpiration and increase in soil evaporation as leaf area index diminishes. The model is also successfully tested by comparison with canopy conductances of emergent trees measured in the Nothofagus forest. The constraint of vegetation surface conductance and evaporation via environmental regulation by irradiance, air saturation deficit and root zone water supply are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00044674
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Über Alkaligraphitverbindungen (1954)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 277 (1954), S. 156-171 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch thermischen Abbau von C8K sowie durch Umsetzung von Graphit mit Kalium und Rubidium konnten weitere Alkaligraphitverbindungen mit Alkalischichten in nur jeder 3., 4. oder 5. basisparallelen Schichtlücke des Graphitgitters erhalten werden. Die Zusammensetzung der 2. Stufe  -  bisher als C16Me formuliert  -  entspricht C24Me, die der folgenden Stufen im Idealfall C36Me, C48Me, C60Me.Bei allen Stufen haben die den Alkalischichten benachbarten Kohlenstoffschichten identische Lagen übereinander, während die anderen C-Ebenen wie im Graphit zueinander orientiert sind. Für die 1. Stufe, C8Me, wird ein neuer Strukturvorschlag entwickelt.Magnetische Messungen geben für die 1.-5. Stufe einen schwachen Paramagnetismus.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19542770307
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    Paper (German National Licenses)
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