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  • Inorganic Chemistry  (52)
  • Humidity response  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Evaporation and canopy characteristics of coniferous forests and grasslands (1993)
    Springer
    Oecologia 95 (1993), S. 153-163 
    Details
    ISSN: 1432-1939
    Keywords: Evaporation ; Aerodynamic conductance ; Canopy conductance ; Humidity response ; Soil water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Canopy-scale evaporation rate (E) and derived surface and aerodynamic conductances for the transfer of water vapour (gs and ga, respectively) are reviewed for coniferous forests and grasslands. Despite the extremes of canopy structure, the two vegetation types have similar maximum hourly evaporation rates (E max) and maximum surface conductances (gsmax) (medians = 0.46 mm h-1 and 22 mm s-1). However, on a daily basis, median E max of coniferous forest (4.0 mm d-1) is significantly lower than that of grassland (4.6 mm d-1). Additionally, a representative value of ga for coniferous forest (200 mm s-1) is an order of magnitude more than the corresponding value for grassland (25 mm s-1). The proportional sensitivity of E, calculated by the Penman-Monteith equation, to changes in gs is 〉0.7 for coniferous forest, but as low as 0.3 for grassland. The proportional sensitivity of E to changes in ga is generally ±0.15 or less. Boundary-line relationships between gs and light and air saturation deficit (D) vary considerably. Attainment of gsmax occurs at a much lower irradiance for coniferous forest than for grassland (15 versus about 45% of full sunlight). Relationships between gs and D measured above the canopy appear to be fairly uniform for coniferous forest, but are variable for grassland. More uniform relationships may be found for surfaces with relatively small ga, like grassland, by using D at the evaporating surface (D0) as the independent variable rather than D at a reference point above the surface. An analytical expression is given for determining D0 from measurable quantities. Evaporation rate also depends on the availability of water in the root zone. Below a critical value of soil water storage, the ratio of evaporation rate to the available energy tends to decrease sharply and linearly with decreasing soil water content. At the lowest value of soil water content, this ratio declines by up to a factor of 4 from the non-soil-water-limiting plateau. Knowledge about functional rooting depth of different plant species remains rather limited. Ignorance of this important variable makes it generally difficult to obtain accurate estimates of seasonal evaporation from terrestrial ecosystems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323485
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  • 2
    Electronic Resource
    Electronic Resource
    Short-term and long-term effects of plant water deficits on stomatal response to humidity in Corylus avellana L. (1979)
    Springer
    Planta 146 (1979), S. 319-326 
    Details
    ISSN: 1432-2048
    Keywords: Humidity response ; Stomata ; Transpiration ; Water potential ; Water stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Short-term (hours) changes in plant water status were induced in hazel (Corylus avellana L.) by changing the evaporative demand on a major portion of the shoot while maintaining a branch in a constant environment. Stomatal conductance of leaves on the branch was influenced little by these short-term changes in water status even with changes in leaf water potential as great as 8 bars. Long-term (days) changes in plant water status were imposed by soil drying cycles. Stomatal conductance progessively decreased with increases in long-term water stress. Stomata still responded to humidity with long-term water stress but the range of the conductance response decreased. Threshold responses of stomata to leaf water potential were not observed with either short-term or long-term changes in plant water status even when leaves wilted. It is suggested that concurrent measurements of plant water status may not be sufficient for explaining stomatal and other plant responses to drought.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387804
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    AlkaliammingraphitverbindungenProfessor Walter Hieber zum 60. Geburtstage gewidmet (1955)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 282 (1955), S. 232-240 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Einwirkung von in flüssigem Ammoniak gelöstem Lithium, Natrium, Kalium, Rubidium und Cäsium auf Graphit oder bei der Umsetzung der bekannten Alkaligraphitverbindungen mit flüssigem NH3 entstehen sehr reaktionsfähige Graphitverbindungen, in denen Metallatome und NH3-Molekeln in das Gitter eingelagert sind. Es konnten bisher dargestellt werden: eine blaue Verbindung mit der angenäherten Zusammensetzung C12Me(NH3)2 und der Struktur einer 1. Stufe, sowie eine alkaliärmere, schwarze Verbindung, etwa C28Me(NH3)2 mit der Struktur einer 2. Stufe.Lithium, gelöst in Methylamin, gibt mit Graphit eine blaue 1. Stufe mit der Idealformel C12Li(CH3NH2)2.Durch die Einlagerung vergrößert sich der Abstand benachbarter C-Ebenen im Graphit von 3,35 auf 6,6 kX bei allen Ammoniakaten und auf 6,9 kX bei der Methylaminverbindung.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19552820126
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  • 5
    Electronic Resource
    Electronic Resource
    Abscheidung des Asparagins aus Flüssigkeiten (1882)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 15 (1882), S. 2855-2856 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.188201502273
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  • 6
    Electronic Resource
    Electronic Resource
    Ueber einige vom Phenylendiamin abgeleitete Azo- und Dis-Azoverbindungen (1882)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 15 (1882), S. 3020-3021 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.188201502299
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  • 7
    Electronic Resource
    Electronic Resource
    Ueber das Glutamin (1883)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 16 (1883), S. 312-315 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.18830160173
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  • 8
    Electronic Resource
    Electronic Resource
    Ueber Bildung von Phenylamidopropionsäure beim Erhitzen von Eiweissstoffen mit Salzsäure und Zinnchlorür (1883)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 16 (1883), S. 1711-1714 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.18830160247
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  • 9
    Electronic Resource
    Electronic Resource
    Ueber das optische Verhalten einiger Amidosäuren (1884)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 17 (1884), S. 1610-1610 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.18840170211
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  • 10
    Electronic Resource
    Electronic Resource
    Betaïn und Cholin aus den Samen von Vicia sativa (1889)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 22 (1889), S. 1827-1829 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.18890220226
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