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  • 75.50 B  (1)
  • Asteraceae  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 36 (1985), S. 121-123 
    ISSN: 1432-0630
    Keywords: 75.50 B ; 75.65 + ; 79.20 H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Magnetic-structure analysis by means of spin-polarization analysis of the secondary electrons in a scanning electron microscope-type (SEM) experiment is demonstrated, using the LEED spin-polarization detector. The advantages in size, handling ability and efficiency, relevant for SEM operation, are pointed out. Limitations and future development are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1615-6110
    Keywords: Angiosperms ; Asteraceae ; Taraxacum sect.Ruderalia ; Sexual diploids ; mixed populations ; distribution pattern ; ecogeographical relations ; taxonomical problems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Herbarium specimens (c. 1 000) and population samples (76) have been screened for the occurrence of diploid representatives ofTaraxacum sect.Ruderalia (T. sect.Vulgaria, nom. illeg.). The area studied comprises German Democratic Republic, Poland, Czechoslovakia, Hungary and parts of Austria, Yugoslavia, and Rumania. Diploids are common from the Valley of the Moravia river on southwards. Isolated outpost localities are found in S. Poland and extend far to the north: neighbourhood of Berlin. Based on the pattern of distribution in Czechoslovakia, the Pannonian (thermophilous) phytogeographical character of the diploids is discussed. Special attention has been paid to morphological differences between di- and triploids in Czechoslovakia. The study provides a basis for further biosystematical and taxonomic studies in the relationships between diploids and polyploids as well as in the stability of agamospecies.
    Type of Medium: Electronic Resource
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