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  • Springer  (2)
  • 1995-1999  (2)
  • 1997  (2)
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  • 1995-1999  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Genetic studies of powdery mildew resistance in common oat (avena sativa L.) I. Cultivars and breeding lines grown in Western Europe and North America (1997)
    Springer
    Euphytica 96 (1997), S. 421-427 
    Details
    ISSN: 1573-5060
    Keywords: Avena sativa ; powdery mildew ; resistance ; oat cultivars
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Common oat (Avena sativa L.) cultivars and breeding lines grown in Western Europe and North America were tested against twelve Erysiphe graminis f. sp. avenae mildew isolates collected in Germany and Denmark. These isolates were selected for their ability to produce differential response patterns permitting characterization of five oat mildew resistance (OMR) groups. From a total of 259 cultivars and lines tested 173 accessions showed susceptible responses, 48 accessions were characterized by susceptible or intermediate responses and 38 accessions revealed isolate-specific resistance response patterns. Eight cultivars and lines had resistance patterns of OMR group 1, six cultivars of OMR group 2, and eleven cultivars of OMR group 3. Two cultivars, each possessed resistance patterns corresponding to OMR groups 1 + 3 and 2 + 3 in combination, respectively. Three cultivars exhibited the response pattern of OMR group 3 in association with an additional unknown resistance. Eight cultivars and lines showed a resistance response pattern not yet detected in the documented OMR groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003057505151
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical diffusion of water in the high-temperature proton conductor Ba3Ca1.18Nb1.82O9-δ (1997)
    Springer
    Ionics 3 (1997), S. 52-55 
    Details
    ISSN: 1862-0760
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ba3Ca1.18Nb1.82O9-δ (also referred to as BCN18) is a promising high-temperature proton conductor. In the dry state it contains an abundant amount of vacancies in the oxygen sublattice. Water may enter the compound occupying the vacancies and supplying protons to the lattice. The conductivity of these protons may be used in future applications of high-temperature proton conductors as electrolytes for SOFCs and in sensors. Chemical diffusion of water in this compound is described by the coupled outward flux of Ovacancies and the inward flux of protons (OH•). The chemical diffusivity is in general a complicated function of the concentrations and the individual diffusivities. In this work, the chemical diffusivity of water is determined by studying the kinetics of a) the weight increase in TG experiments, and b) of dilatometric length changes upon subjecting the samples to humid atmospheres. The chemical diffusivities determined using techniques a) and b) are in good agreement. Likewise, the present data are compatible with those determined in a previous thermal desorption study. The present data, however, only apply to situations where the initial proton concentration is rather low and where the proton content is not changed dramatically in the experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02375524
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    Paper (German National Licenses)
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