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  • 1
    Electronic Resource
    Electronic Resource
    New growth technique for luminescent layers on silicon (1992)
    Springer
    Applied physics 54 (1992), S. 567-569 
    Details
    ISSN: 1432-0630
    Keywords: 68.55−a ; 68.65+g ; 78.55−m
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We report the growth of siloxene on crystalline silicon (111) surfaces based on the chemical transformation of a calcium disilicide layer. The siloxene films obtained show a prominent luminescence in the green, with intensities comparable to the luminescence observed from porous silicon. The structural properties of the siloxene films are studied with infrared transmission and TEM micrographs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324341
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The spatial distribution of cations in nematocytes of Hydra vulgaris (1991)
    Springer
    Hydrobiologia 216-217 (1991), S. 661-669 
    Details
    ISSN: 1573-5117
    Keywords: Hydra vulgaris ; nematocysts ; potassium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The spatial distribution of cations was assayed qualitatively and quantitatively in tentacular nematocytes of Hydra vulgaris in a scanning transmission electron microscope by means of x-ray microanalysis performed on 100 nm thick freeze-dried cryosections. The matrix of undischarged cysts (stenoteles, desmonemes and isorhizas) was found to contain mainly K+. In isolated nematocysts of Hydra the intracapsular potassium can be readily substituted by practically any other mono- and divalent cation (Na+, NH4 +, Mn2+, Co2+, Mg2+, Ca2+, Fe2+) all, except Fe2+, without impairing the ability of the cyst to respond to the chemical triggering with dithioerythritol or proteases. Monovalent cations increase the osmotically generated intracapsular pressure compared to divalent ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026528
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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