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  • 1980-1984  (2)
  • 1965-1969  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Planta 148 (1980), S. 245-250 
    ISSN: 1432-2048
    Schlagwort(e): Analytical electron microscopy ; Dianthus ; Flower longevity ; Silver thiosulphate ; X-ray
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Carnations were treated with a silver thiosulphate complex to prevent wilting of the flowers. The ultrastructural localization of silver and sulphur in the receptacle tissue was investigated by electron microscopy. Electron-dense deposits were present in the receptacle tissue. Coarse-grained deposts (diam. 60–100 nm) were predominantly observed at the inner side of the cell wall, whereas fine-grained deposits (diam. 20–60 nm) were predominantly present inside the cell-wall region and in the intercellular spaces. These particles were analyzed for chemical elements by X-ray analytical electron microscopy (Philips EM 400 plus Edax energy dispersive analyzer, type 711). In both types of deposits, the presence of silver and sulphur was verified. Point analysis revealed that in both precipitates the S/Ag ratio was of the same order.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    European journal of plant pathology 71 (1965), S. 20-24 
    ISSN: 1573-8469
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Beschreibung / Inhaltsverzeichnis: Samenvatting De polyëdermembranen vanMalacosoma neustria, Barathra brassicae enAdoxophyes reticulana, alsmede de buitenste en binnenste membranen om de deeltjes van deze kernpolyëdervirussen, werden met de elektronenmicroscoop bestudeerd (fig. 1A-I, 2A-C). Om de polyëders te fixeren en ter verkrijging van bepaalde contrasten in ultra-dunne coupes werd van verschillende agentia gebruik gemaakt. Vergelijking van de verkregen foto's (fig. 2D-I, 3A-B) wijst uit, dat het buitenste membraan uit een bimoleculaire laag van lipiden bestaat, die aan beide zijden door koolhydraten en eiwitten zijn begrensd (fig. 4); de polyëdermembranen (fig. 3B) bestaan evenals de binnenste membranen echter uitsluitend uit eiwitten. De virusstaafjes en de polyëders zijn respectievelijk door het binnenste membraan en door het polyëdermembraan nauw omsloten.
    Notizen: Abstract Electron micrographs show the presence of the polyhedral, the outer, and the inner membranes occurring in nuclear polyhedral bodies fromMalacosoma neustria, Barathra brassicae andAdoxophyes reticulana. The outer membranes appear to be composed of a central, bimolecular leaflet of lipids bounded on either side by carbohydrates and proteins. The polyhedral and inner membranes, however, seem to consist of protein only. The inner membranes are closely attached to the virus rods, and so are the polyhedral membranes to the polyhedral protein.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Fresenius' Zeitschrift für analytische Chemie 308 (1981), S. 280-282 
    ISSN: 1618-2650
    Schlagwort(e): Mikroanalyse von Boden ; Massenspektrometrie, Lasermikrosonde ; Dünnschliffe
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Experiments with a LAMMA-500 instrument were performed in order to test whether or not thin sections of soils with a thickness of more than 15 Μm could be analysed with this instrument. Although the usual thickness of the specimens for this instrument lies between 0.1–1 Μm, it was possible to analyse such thick sections by application of laser milling in which the laser beam was aimed at grazing incidence onto the edge of the section. In this way a path was cleared through the section by erosion and the material that sputtered away along this path could be analysed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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