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  • 1
    ISSN: 1435-1536
    Keywords: Key words Poly(ethylene-co-5.4 mol% 3 ; 5 ; 5-trimethylhexyl methacrythlate) ; poly(dimethyl-siloxane) ; miscibility ; permeability ; dynamic elastic measurement ; DSC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  Blends of poly(ethylene- co-5.4 mol% 3,5,5-trimethylhexyl methacrylate) (PE-TMHM) with poly(dimethylsiloxane) (PDMS) were prepared in the PDMS content range from 0 to 20%. The miscibility was studied for PE-TMHM–PDMS blends by DSC, dynamic mechanical and microscopic spectroscopy, and the gas permeability was measured for O2, N2 and CO2 as function of PDMS content. PE-TMHM and PDMS were partially miscible with each other below 20 wt% of PDMS content. The permeability coefficients (P) for O2, N2 and CO2 were increased by the blending of PDMS to PE-TMHM. The change of P for O2 with PDMS content well reflected the partially miscible phase separation behavior.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 248 (1990), S. 68-70 
    ISSN: 1434-4726
    Keywords: Caloric nystagmus ; Otolith organ
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influence of caloric stimulation on the otolith organs was investigated in cats by recording the firing rate of the single vestibular nerve fiber originating from each otolith organ. Sixty-six percent of the vestibular nerve fibers originating from the otolith organs responded to the caloric stimulation. The caloric nystagmus occurred not only by the activities of the semicircular canal system but also by those of the otolith system.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 28 (1973), S. 111-119 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Reaktionen von Polyvinylchlorid (PVC) mit einigen nucleophilen Agentien wie Azid-, Thiophenoxid-, und Dithiocarbamat-Ionen kommen in Wasser nicht zustande. Die heterogenen Reaktionen werden von kationenoberflächenaktiven Substanzen wirksam katalysiert. Harnstoff und Methylalkohol, die hydrophobe Bindungen zerbrechen, inhibieren die Reaktion. Auf Grund experimenteller Daten wird angenommen, daß die kationenoberflächenaktiven Substanzen von dem in Wasser suspendierten pulvrigen PVC adsorbiert werden und daß die positive Ladung die nucleophilen Agentien heranbringt.
    Notes: The reactions of poly(vinyl chloride) (PVC) with some nucleophiles such as azide, thiophenoxide and dithiocarbamate ions do not take place in water. These heterogeneous reactions are remarkably catalyzed by cationic surfactants. Urea and methanol which destroy hydrophobic bondings inhibit the reaction. On the basis of the experimental data it was assumed that the cationic surfactants are adsorbed on the surface of the suspended PVC powder and that the positive charges attract the nucleophiles.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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