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  • 1985-1989  (4)
  • 13.75.Cs  (2)
  • Forage maize breeding  (1)
  • Langmuir-Blodgettmultilayers  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Optimum prediction of three-way crosses from single crosses in forage maize (Zea mays L.) (1987)
    Springer
    Theoretical and applied genetics 74 (1987), S. 339-345 
    Details
    ISSN: 1432-2242
    Keywords: Epistasis ; Genotype x environment inter-actions ; Forage maize breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Three-way cross means were predicted with formulae involving linear functions of general (GCA) and specific combining ability (SCA) effects estimated from single-cross factorials between genetically divergent populations. Data from an experiment with 66 single-cross and 66 three-way cross forage maize (Zea mays L.) hybrids was used for comparing the prediction formulae. The genotypic correlation (r) between observed and predicted three-way crosses increased with increasing χ, the weighting factor of SCA effects, for plant height and ear dry matter (DM) content. It displayed slightly convex curves for total and stover DM yield, ear percentage, and metabolizable energy content of stover. For Jenkins' method B, r was considerably less than 1.0 for all traits, indicating the presence of epistasis. The square root of heritability (hĜ) of the predicted means decreased with increasing χ, the reduction being small with a greater number of test environments. Using the product r·hĜ as a criterion of efficiency, none of the prediction methods was consistently superior and the differences among them were rather small (〈 7.5%) for all traits, irrespective of the number of test environments. We recommend evaluating the GCA of a greater number of lines from each parent population in testcrosses with a small number of elite lines from the opposite population. All possible three-way or double crosses between both sets of lines should be predicted by Jenkins's method C. This procedure allows one to select with a higher intensity among the predicted hybrids and thus should increase the genetic gain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00274716
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Polymeric amphiphiles with hydrophilic main chain spacers: Studies in monolayers and Langmuir-Blodgett multilayers (1988)
    Springer
    Colloid & polymer science 266 (1988), S. 806-813 
    Details
    ISSN: 1435-1536
    Keywords: Polymericamphiphiles ; hydrophilic spacer ; monolayer ; Langmuir-Blodgettmultilayers ; SAXS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A methacrylic lipid was polymerized to form an amphiphilic homopolymer and random copolymers with various levels of acrylic acid comonomers. The behavior of these polymeric lipids was investigated in monolayers at the air-water interface and in Langmuir-Blodgett multilayers on polymer foil supports. The acrylic acid acts as a hydrophilic spacer along the polymer backbone, and improves the ability of the polymer to self-organize into highly ordered monolayers and ultimately LB multilayers. It is shown that the quality and stability of the multilayers increase substantially with the increase in comonomer content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01417864
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the 4f strong interaction level width in light antiprotonic atoms (1986)
    Springer
    The European physical journal 325 (1986), S. 261-265 
    Details
    ISSN: 1434-601X
    Keywords: 36.10.Gv ; 13.75.Cs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The yields of the atomic 4→3 transitions in antiprotonic14N,16,17,18O,19F, and23Na were measured at the CERN antiproton facility, LEAR. From these, the widths Γup of the 4f levels were determined to be 136±19meV (14N); 603±22 meV (16O); 731±35 meV (17O); 795±23 meV (18O); 2.79±0.16 eV (19F); and 23.8±7.4 eV (23Na).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294606
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  • 4
    Electronic Resource
    Electronic Resource
    First direct observation of strong interaction spin-orbit effects in antiprotonic atoms (1988)
    Springer
    The European physical journal 329 (1988), S. 235-241 
    Details
    ISSN: 1434-601X
    Keywords: 36.10.Gv ; 13.75.Cs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The strong ¯p-nucleus spin-orbit interaction was investigated in a measurement of the strong-interaction effects of the 9→8 transition in ¯p 174Yb at the Low-Energy Antiproton Ring (LEAR) at CERN. This measurement was part of an experimental programme where, for the first time, the fine-structure components of the last observable X-ray transition in a ¯p atom, which carries information on the strong ¯p-nucleus interaction, were resolved and studied individually. The observed splitting ΔE exp=2408±26 eV consists of the electromagnetic fine-structure splitting ΔE FS=2350 eV and an additional splitting Δɛ=58±26 eV. In addition, one finds a significant difference in the level widths of Δ=195±59 eV with the larger value⇊=1216±41 eV for the lower fine-structure level. This experiment follows an earlier measurement on ¯p 138Ba, where the transition 8→7 is influenced by the strong interaction. In this case, however, the fine-structure components could not be resolved. The results for174Yb may be attributed to a spin-orbit (LS) term in the complex strong-interaction potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283780
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