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  • 1985-1989  (3)
  • phase differentiation  (2)
  • Genomes
  • 1
    Digitale Medien
    Digitale Medien
    Utilization of wild relatives in the genetic improvement of Arachis hypogaea L. (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 433-439 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Arachis ; Amphidiploids ; Genomes ; Chromosome pairing ; Recombinations
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Synthetic amphidiploids were established in 32 combinations involving 8 diploid wild species representing both A and B genomes of section Arachis. Bivalent and multivalent associations in the amphidiploids of 7 A genome species confirm that these species have identical genomes. Contrastingly, high bivalent frequencies in amphidiploids involving the A and B genome species suggest that A. batizocoi has a distinct ‘B’ genome that is partially homologous to the other genome ‘A’ represented in the rest of the species. Crossability, chromosome pairing and pollen and pod fertility in hybrids between A. hypogaea and amphidiploids have revealed that these amphidiploids can be used as a genetic bridge for the transfer of genes from the wild species into the cultivated groundnut.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00289523
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Optical differentiation of orthorhombic superconductors such as YBa2Cu3O7 from their tetragonal precursor material (1988)
    Springer
    Journal of superconductivity 1 (1988), S. 35-44 
    Details
    ISSN: 1572-9605
    Schlagwort(e): ErBa2Cu3O7 ; superconductivity ; optical microscopy ; phase differentiation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract The orthorhombic superconducting phase of YBa2Cu3O7 is shown to be differentiable from its tetragonal precursor by optical microscopy. Individual grains 1 μm in diameter or larger are found to either exhibit the color of the compensator in reflected polarized light (tetragonal material) or to change colors from the compensator (orthorhombic material). By using color differences, retained tetragonal material and the orthorhombic nature of untwinned areas of grains are identified. The advantage to producing better superconducting single crystals and sintered polycrystalline materials is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00617949
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Color indicator of cuprate superconductivity observed by polarized light microscopy (1989)
    Springer
    Journal of superconductivity 2 (1989), S. 351-359 
    Details
    ISSN: 1572-9605
    Schlagwort(e): Cuprates ; superconductivity ; optical microscopy ; phase differentiation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract A common mineralogical technique for identifying individual crystals in a heterogeneous, polycrystalline sample involves the observation at room temperature of their colors in reflected polarized light (colors of polarization). Here we present the observation that a brownish yellow (golden) color of polarization is not only characteristic of the YBa2Cu3O7 superconductor, but of the cuprate superconductors in general and is correlated with the occurrence of superconductivity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00618522
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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