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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 352 (1995), S. 386-393 
    ISSN: 1432-1912
    Keywords: Brain slice ; Patch-clamp ; Rabbit ; Cyclic AMP ; Potassium current ; Histamine receptors Olfactory bulb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Effects of histamine, histamine agonists and antagonists on steady state current in principal neurons and interneurons were investigated in thin slices from the olfactory bulb of newborn rabbits with the nystatin perforated patch-clamp technique and local pipette application. No change in steady state current was observed in mitral cells. In most of the periglomerular, juxtaglomerular and granular cells, however, H1-receptor activation caused an outward current; a similar effect, but mostly not on the same neurons was elicited by 8-bromo-cyclic-AMP. These currents were reversed at the potassium equilibrium potential and blocked by apamin and therefore probably represent calcium sensitive potassium currents. H2-receptor activation caused an inward current which also reversed at the potassium equilibrium potential, indicating block of a potassium current. Specific H3-receptor activation and cyclic GMP were ineffective. Histamine usually caused a combined effect beginning with an inward current. Histaminergic neurons fire with changes in behavioural state and can, by the described mechanisms, markedly influence signal processing in the olfactory bulb.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Wärmeleitfähigkeit und die spezifische Warmekapazität von amorphem, nichtorientiertenl Polycarbonat wurden bei Temperaturen zwiscken 2 und 80 K gemessen. Die Temperaturabhängigkeit der Wärmeleitfahigkeit unterhalb von 20 K zeigt das Vorhandensein von Heterogenitaten an, deren spezifische Oberflache aus der mittleren freien Weglänge der Phononen abgeschätzt wird. Die heterogene Struktur bleibt nach Erwärmen des Materials äber die Glasäbergangstemperatur erhalten.
    Notes: The thermal condcutivity and specific heat of amorphous, non-oriented polycarbonate were measured in the temperature range between 2 and 80 K. The temperature dependence of the thermal conductivity below 20 K indicates the presence of heterogeneities. The specific surface of these heterogeneities is estimated from the phonon mean free path length. The heterogeneous structure is preserved when the material is heated above the glass transition temperature.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 22 (1889), S. 989-989 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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