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  • 1
    Electronic Resource
    Electronic Resource
    Locally evoked potentials in slices of rat neostriatum: A tool for the investigation of intrinsic excitatory processes (1979)
    Springer
    Experimental brain research 34 (1979), S. 575-590 
    Details
    ISSN: 1432-1106
    Keywords: Neostriatum slices ; Field potentials ; Action potentials ; EPSPs ; Intrinsic excitation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Field potentials, extracellular unitary discharges and intracellular potentials evoked by intrastriatal stimulation were recorded from slices (thickness 200–400 μm) of rat neostriatum maintained in an artificial medium. The field potentials consisted of two negative waves appearing at latencies of 0.5–1.5 ms (N-1) and 2–4 ms (N-2). Extracellular unitary records showed two types of discharges, one with short but constant latencies at threshold level stimulation and the other with longer and variable latencies. In intracellular recordings the late discharge was seen to arise from EPSPs. Based on the intra- and extracellular unitary records, N-1 was identified as the population spike of antidromically or directly activated unitary discharges and N-2 as that of orthodromically activated discharges. This interpretation was substantiated by the fact that the N-2 potential was blocked in a perfusion medium containing a lower Ca++ or a higher Mg++ concentration than the standard solution. Neither interruption of ascending neostriatal inputs nor decortication 14 days prior to recording altered the configuration of the locally evoked potentials or the probability of synaptically driven discharge occurrence. Thus by intrastriatal stimulation, neostriatal neurons are activated antidromically or directly and/or orthodromically through intrinsic excitatory synapses. Since the intracellular recordings showed that neostriatal neurons can be well preserved, this preparation can be regarded as a useful tool for electrophysiological and neuropharmacological investigations on intrinsic excitatory processes in the neostriatum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00239150
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An X-ray topographic study of dislocations in a LiNbO3 crystal (1976)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 9 (1976), S. 375-377 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The Burgers vectors of dislocations in a Czochralski-grown LiNbO3 crystal have been determined by using Lang X-ray diffraction topography. Dislocations with Burgers vectors of both 〈2\bar 201〉 and 〈\bar 1101〉 types (in hexagonal indices) are observed. The direction of the two Burgers vectors is thus identified to be along the line from one Nb (or Li) to the nearest Nb (or Li), and along the line from one Nb (or Li) to the second neighbours respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889876011655
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Tip potential and fixed charges on the glass wall of microelectrode (1975)
    Springer
    Cellular and molecular life sciences 31 (1975), S. 545-546 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Glasmikroelektroden, mit 3M KCl gefüllt, wurden verschiedenartig präpariert und ihr Spitzenpotential mit 0.01∼3.0M KCl gemessen. Die Resultate sprechen dafür, dass die negativen elektrischen Ladungen, an der Glaswand fixiert, eine entscheidende Rolle bei der Entstehung des Spitzenpotentials spielen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01932449
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Distribution ofγ-aminobutyric acid (GABA) in the ganglia ofAplysia kurodai (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1623-1624 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The concentration of GABA was determined in each ganglion ofAplysia kurodai by microassay. Highest concentration was observed in buccal ganglia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01934036
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    Paper (German National Licenses)
    Fulltext
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