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  • He adsorption  (1)
  • Immunofluorescence  (1)
  • 1995-1999  (2)
  • 1960-1964
  • 1995  (2)
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  • 1995-1999  (2)
  • 1960-1964
Year
  • 1995  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Density of He adsorbed in micropores at 4.2K (1995)
    Springer
    Adsorption 1 (1995), S. 165-173 
    Details
    ISSN: 1572-8757
    Keywords: He adsorption ; micropore ; ultramicroporosity ; N2 adsorption ; zeolite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The density of He adsorbed in the cylindrical micropores of zeolites NaY and KL has been determined by He adsorption at 4.2K. He adsorption isotherms were then compared with N2 adsorption isotherms at 77K. Crystallographic considerations of the micropore volumes gave the density of the He adsorbed layer, which is necessary for assessment of ultramicroporosity of less-crystalline microporous solids, such as activated carbons. The determined density of He adsorbed in the cylindrical micropores of the zeolite was in the range 0.22 to 0.26 gml−1, greater than that of He adsorbed on a flat surface (0.202 gml−1). A value for the density of He between 0.20 to 0.22 gml−1 is recommended for evaluation of ultramicroporosity of a slit-shaped microporous system such as activated carbon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705003
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  • 2
    Electronic Resource
    Electronic Resource
    Assembly of cortical microtubules during cold treatment of the coenocytic green alga, Chaetomorpha moniligera (1995)
    Springer
    Planta 196 (1995), S. 190-192 
    Details
    ISSN: 1432-2048
    Keywords: Chaetomorpha ; Cold treatment ; Cortical microtubule ; Immunofluorescence ; Microtubule assembly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of cold treatment on the cortical microtubules (MTs) of Chaetomorpha moniligera Kjellman were investigated by immunofluorescence microscopy. Cortical MTs in Chaetomorpha thallus are arranged longitudinally. In this study, 70–75% of MTs disassembled within 4 h on ice while the others remained stable under these conditions. Reticulate background immunofluorescence, assumed to indicate the presence of a tubulin monomer, was distributed about the stable MTs. Immunofluorescence was prominent in only 50% of the cells. Tubulin polymerization was noted where the background and MT immunofluorescence was strong. New MTs grew transversely as single strings or clusters from the sides of MTs after cold treatment for 4 h and elongated with time to take on a reticulate form at 24 h. The significance of this tubulin polymerization under cold treatment is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193233
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    Paper (German National Licenses)
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