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  • entropies  (2)
  • 4-Hydroxybutyric aciduria  (1)
  • Agropyron  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Soil and plant water relations in a crested wheatgrass pasture: response to spring grazing by cattle (1987)
    Springer
    Oecologia 73 (1987), S. 573-578 
    Details
    ISSN: 1432-1939
    Keywords: Soil moisture ; Water balance ; Leaf water potentials ; Defoliatlon ; Agropyron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Few field studies have attempted to relate effects of actual livestock grazing on soil and plant water status. The present study was initiated to determine the effects of periodic defoliations by cattle during spring on soil moisture and plant water status in a crested wheatgrass (Agropyron cristatum (L.) Gaertn. and A. desertorum (Fisch. ex Link) Schult.) pasture in central Utah. Soil moisture in the top 130 cm of the soil profile was depleted more rapidly in ungrazed plots than in grazed plots during spring and early summer. Soil moisture depletion was more rapid in grazed plots in one paddock after 1 July due to differential regrowth, but there was no difference in soil water depletion between plots in another paddock during the same period. This difference in soil water depletion between paddocks was related to a difference in date of grazing. Although more water had been extracted from the 60 cm to 130 cm depths in ungrazed plots by late September, cumulative soil moisture depletion over the entire 193 cm profile was similar in grazed and ungrazed plots. Prior to 1 July, grazing had no effect on predawn leaf water potentials as estimated by a pressure chamber technique; however, after 1 July, predawn leaf water potentials were lower for ungrazed plants. Midday leaf water potentials were lower for grazed plants before 1 July, but did not differ between grazed and ungrazed plants after 1 July. A 4- to 8-day difference in date of defoliation did not affect either predawn or midday leaf water potentials. The observed differences in water use patterns during spring and early-summer may be important in influencing growth and competitive interactions in crested wheatgrass communities that are subject to grazing by domestic livestock.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379418
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    4-Hydroxybutyric aciduria in a patient without ataxia or convulsions (1988)
    Springer
    European journal of pediatrics 147 (1988), S. 529-531 
    Details
    ISSN: 1432-1076
    Keywords: 4-Hydroxybutyric aciduria ; Succinic semialdehyde dehydrogenase deficiency ; Aminobutyric acid (GABA) metabolism ; Hyperactivity ; Hypotonia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A child presenting with mild psychomotor retardation, hypotonia, microcephaly and hyperkinesis is described. Urinary organic acid analysis by combined gas chromatography-mass spectrometry revealed 4-hydroxybutyric aciduria. Succinic semialdehyde dehydrogenase activity in extracts of white cells derived from the patient was less than 10% of control values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00441983
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Modeling Sub- and Super-ambient Heat Capacities of the Group Iva Compounds Despite the Lanthanide Contraction (1999)
    Springer
    Journal of thermal analysis and calorimetry 57 (1999), S. 659-667 
    Details
    ISSN: 1572-8943
    Keywords: Cp ; Cv ; entropies ; group IVA element compounds ; Hf ; Zr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract This paper is concerned with the estimation of heat capacities in the IVA 3d-transition element compounds using especially Zr and Hf compounds as examples. Most prediction schemes routinely tacitly assume that volumes and masses trend ‘in parallel’. However, the lanthanide contraction here ensures for ZrX/HfX systems — and generally elsewhere — that this is not so in this portion of the periodic table. Available methods such as Latimer's, Volumetric Priority, Komada-Westrum, Grimvall's, and Sommers' are compared on IVA elements and compounds. Only the Sommers approach has volumetric input. It provides the best prediction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010111908035
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Advantages to Conversion of Lattice Heat Capacity to Cv in the Resolution of Excess Properties The Ln2S3's as an example (1998)
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 1055-1062 
    Details
    ISSN: 1572-8943
    Keywords: Cp ; Cv ; entropies ; Ln2S3 ; phonon dispersion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract This paper represents a fitting (modeling) of the temperature dependence of the Komada-Westrum characteristic temperature for those γ-, δ- and ε-phase lanthanide sesquisulfides for which the total heat capacities, including internal degrees of freedom (e.g., Schottky and magnetic contributions), were connected to the residue of only lattice vibrations yielding lattice heat-capacity contributions. These characteristic temperatures (θKW) at 298.15 K are seen to behave smoothly (nearly linearly) as a function of (cationic) atomic number within the region of stability of each phase as does the density. The trends between the phases also show some consistency but not predictability of one from the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010153110658
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    Paper (German National Licenses)
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