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  • 1
    Digitale Medien
    Digitale Medien
    Induction of pollen callus in anther cultures of Feijoa sellowiana Berg. (Myrtaceae) (1993)
    Springer
    Plant cell reports 13 (1993), S. 45-48 
    Details
    ISSN: 1432-203X
    Schlagwort(e): Feijoa sellowiana ; Pollen callus ; B-pathway
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Anthers of Feijoa sellowiana Berg. (feijoa) produced pollen callus when cultured in Murashige and Skoog medium containing 2,4-dichlorophenoxyacetic acid and benzyladenine or in nurse cultures. Somatic callus was also formed in large amounts from the connective and from the cut end of the filament. Anthers containing microspores at the stage immediately prior to the first pollen mitosis cultured in the presence of 3% sucrose, presented the highest frequencies of induction. Androgenetic divisions were initiated by the formation of two morphologically equal cells, the so-called B-pathway. Attempts to regenerate pollen plants were unsuccessful but leaf-like structures could be obtained in regeneration media containing combinations of gibberellic acid and benzyladenine.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00232314
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Near-barrier transfer in16O +144, 154Sm (1988)
    Springer
    The European physical journal 331 (1988), S. 451-455 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Cd ; 25.7O.Jj
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The production of nitrogen and carbon fragments in the reactions induced by16O on144Sm and154Sm targets was studied at two bombarding energies (65 MeV and 72 MeV) around the interaction barrier. The measured angular distributions exhibit the characteristic behaviour of direct transfer reactions, and theQ-value spectra are typically centered at the values predicted by kinematic selectivity. The comparison between fusion and charged-particle transfer cross sections shows that whereas fusion is the most important process at the highest bombarding energy, transfer reactions become comparable or even dominant (as in the144Sm case) at near-barrier energies. The different transfer probabilities observed for the two systems are analyzed in terms of nuclear deformation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01291903
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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