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  • 1
    Electronic Resource
    Electronic Resource
    Electrotropism of pollen tubes of camellia and other plants (1991)
    Springer
    Sexual plant reproduction 4 (1991), S. 138-143 
    Details
    ISSN: 1432-2145
    Keywords: Calcium ; Camellia japonica ; Electrotropism ; Pollen tube
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Pollen tubes of Camellia japonica grew toward the cathode upon exposure to an electric field. Reversal of the field direction during the course of tube growth also reversed the direction of tube growth. These observations demonstrate the existence of the electrotropism of pollen tubes. This electro tropic response was confirmed in several kinds of pollen. The direction that the growing tube turned was found to differ with different pollen species, but it did not vary in those of the genus Camellia. The curvature in response to the electrotropic stimulus was influenced by calcium ion concentration as well as by the strength of the applied fields. The optimum condition for each was studied. The degree of tube extension decreased generally in inverse proportion to current density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00196501
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Alignment of atomic autoionizing states created by slow Na++He collisions (1993)
    Springer
    The European physical journal 25 (1993), S. 157-160 
    Details
    ISSN: 1434-6079
    Keywords: 34.50.Fa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ejected-electron spectra have been measured for collisions of He-atoms with Na+-ions, whose impact energy ranged from 1.7 to 7.0 keV. The ion impact-energy dependence of the angular-differential cross-section of the ejected electrons has been investigated for an aligned autoionizing state Na**(2p 5 3s 2 2 P), which has been created by charge transfer from the He-atoms. The alignment of the autoionizing state Na**(2p 5 3s 2 2 P) is discussed in relation to the scattering angles of the Na+-ions. A complete longitudinal alignment has been observed with respect to the quasimolecular axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01450169
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Alignment of atomic autoionizing states created by slow Li++Ne collisions (1990)
    Springer
    The European physical journal 15 (1990), S. 301-307 
    Details
    ISSN: 1434-6079
    Keywords: 34.50.Fa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Ejected-electron spectra have been measured in collisions of Ne-atoms with Li+-ions, whose impact energy has been ranged from 0.4 to 7.0 keV. The ion impact-energy dependence has been investigated on the angular-differential cross-section of the ejected electrons from the aligned autoionizing state Ne** 2p 43s 2 1 D. In the highest energies studied, cross section maxima have been found at both forward and backward angles with respect to the Li+-ion beam direction, whereas the cross sections are maximized at around right angles below intermediate energies. The data were analyzed semi-quantitatively, and the alignment of the autoionizing state was recognized to be characterized by a representative scattering angle of the Li+-ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437173
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    Paper (German National Licenses)
    Fulltext
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