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  • Springer  (2)
  • Wiley-Blackwell  (2)
  • 1985-1989  (4)
  • 1985  (4)
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  • 1985-1989  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 157 (1985), S. 789-796 
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In laboratory mice (strain NMRI) the ontogenetic development of single unit activity in the olfactory bulb was investigated. From postnatal day 10 on, spontaneously active neurons were recorded with glass-microelectrodes, and their responses to olfactory stimuli were tested (butyric acid, geraniol, grass- and nest-odour). From day 10 to 13 only very few neurons were recordable (and most of these elements were too weak and were lost before being stimulated). At day 14 the number of recordable neurons increased rapidly, and by day 15 spontaneously active neurons reached adult level in terms of incidence and electric properties. There were 3 types of neurons: 1. respiration synchronous elements; 2. bursting neurons not correlated with respiration; 3. continuously, but randomly, firing elements (about 60% of all neurons). Reactions to odour stimuli (excitation, ca. 50%; inhibition, ca. 34%; complex reactions, ca. 12%; change in activity pattern, ca. 4%) occurred as soon as the cells were stable enough for testing. The reaction patterns showed no age specific differences; the duration of the responses varied from 100 ms to 100 s. In younger animals (P11–P14) the percentage of responses was slightly smaller (47%) than in the older ones (P30–P50; 64% response to olfactory stimulation). For some of the odours tested the proportion of responding cells differed depending on age (for instance grass odour evoked a response in 40% of the cells in young ones, but in 65% in adults).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 83 (1985), S. 77-80 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Using pre- and post-embedding procedures, neuron-specific enolase and calcitonin were localized in rat thyroid parafollicular cells by light and electron microscopy. Peroxidase-antiperoxidase (PAP), biotin-avidin (ABC) and protein A — colloidal gold techniques were used. In paraffin sections neuron-specific enolase was demonstrated in all calcitonin-storing parafollicular cells in rats aging 1 to 180 days. The post-embedding procedure failed to detect neuron-specific enolase in ultrathin sections, but the enzyme could be demonstrated using a preembedding procedure. Neuron-specific enolase was localized exclusively within the cytosol of parafollicular cells, while calcitonin was localized within secretory granules applying either post- or pre-embedding incubation techniques.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 328-332 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of 1, 1-Dimethylthio- and 1-Dimethylamino-2-nitroethene with Malononitrile Dimer
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 529 (1985), S. 157-172 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Phosphido Complexes. IX. P-Functional Heterocyclic Manganese Phosphorus Four- and Six-Membered Ring Complexes.From the reaction of Me3SiPH2 with (CO)5MnCl the four-membered ring complex [(CO)4MnPH2]2 1 and the six-membered ring complex [(CO)4MnPH2]3 2 are available. Using CCl4, CBr4, and CI4 1 can be halogenated by hydrogen-halogen exchange yielding [(CO)4MnPCl2]2 3, [(CO)4MnPBr2]2 4, and [(CO)4MnPI2]2 5, respectively. The corresponding reactions of 2 lead to the formation of completely P-halogenated six-membered ring complexes only in the case of CCl4 to give [(CO)4MnPCl2]3 6. Upon heating in solution 6 is converted into 3. 3, 4, and 5 react with Ag[BF4] yielding [(CO)4MnPF2]2 7. [(CO)4MnPF2]3 8 is formed reacting 6 with Ag[BF4]. Considerable differencies in reactivity depending upon the ring size are observed in all P-substitution reactions. I.R., N.M.R. and mass spectral data are reported.
    Notes: Durch Umsetzung von Me3SiPH2 mit (CO)5MnCl sind der Vierringkomplex [(CO)4MnPH2]2 1 und der Sechsringkomplex [(CO)4MnPH2]3 2 zugänglich. 1 1 läßt sich mit CCl4, CBr4 und CI4 unter Wasserstoff/Halogen-Austausch zu [(CO)4MnPCl2]2 3, [(CO)4MnPBr2]2 4 bzw. [(CO)4MnPI2]2 5 halogenieren. Entsprechende Reaktionen von 2 führen nur mit CCl4 zum vollständig P-halogenierten Sechsring [(CO)4MnPCl2]3 6. Beim Erhitzen in Lösung lagert sich 6 in 3 um. 3, 4 und 5 reagieren mit Ag[BF4] zu [(CO)4MnPF2]2 7. [(CO)4MnPF2]3 8 bildet sich bei der Umsetzung von 6 mit Ag[BF4]. Bei allen P-Substitutionsreaktionen beobachtet man erhebliche Reaktivitätsunterschiede in Abhängigkeit von der Ringgröße. NMR- und IR-spektroskopische sowie massenspektrometrische Daten werden mitgeteilt.
    Additional Material: 2 Tab.
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