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  • 1
    Electronic Resource
    Electronic Resource
    The use of state-dependent modulation of spinal reflexes as a tool to investigate the organization of spinal interneurons (1999)
    Springer
    Experimental brain research 128 (1999), S. 263-277 
    Details
    ISSN: 1432-1106
    Keywords: Key words Spinal cord ; Motoneurons ; DOPA ; Locomotion ; Scratching ; Spatial facilitation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  This review examines the proposition that state-dependent modulation of transmission through spinal reflex pathways can be used as an investigative tool to reveal details about the organization of spinal interneurons into functional circuits. The first set of examples includes the use of spinal and supraspinal lesions, as well as the administration of the drug l-dihydroxyphenylalanine (l-DOPA), to produce different, relatively stable ”states” of the central nervous system (CNS), revealing previously unsuspected spinal pathways activated by the flexor reflex afferents (FRA). The second set of examples deals with the use of fictive locomotion and scratching to investigate the organization of oligosynaptic excitatory and inhibitory reflex pathways from cutaneous and muscle afferents. As in the first set of examples, several hitherto unknown reflex pathways have been found only during the flexion or extension phases of rhythmic locomotion, which are regarded as different CNS states. Differences in the patterns of control can be used to infer the existence of distinct sets of reflex pathway interneurons that have remarkably precise input/output relations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002210050847
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Extracellular enzyme activities of the ericoid mycorrhizal endophyte Hymenoscyphus ericae (Read) Korf & Kernan: their likely roles in decomposition of dead plant tissue in soil (1998)
    Springer
    Plant and soil 205 (1998), S. 181-192 
    Details
    ISSN: 1573-5036
    Keywords: cellulase ; ericoid mycorrhizas ; hemicellulase ; lignin degradation ; pectinase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Hymenoscyphus ericae (Read) Korf & Kernan is known to form mycorrhizas with a number of host plants in the Ericaceae. The fungus produces a range of extracellular enzyme activities which have the potential to mediate utilisation of organic sources of nitrogen and phosphorus in soil. H. ericae has recently been shown also to produce enzyme activities that may allow the fungus to decompose components of the plant cell wall, facilitating access to mineral nutrients sequestered within the walls of moribund plant cells. In this review we assess the evidence for production of cellulolytic, hemicellulolytic, pectinolytic and ligninolytic activities by H. ericae and discuss their likely relevance to nutrient cycling processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004376731209
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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