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  • 1
    Electronic Resource
    Electronic Resource
    Human handedness and asymmetry of the motor cortical silent period (1999)
    Springer
    Experimental brain research 128 (1999), S. 390-396 
    Details
    ISSN: 1432-1106
    Keywords: Key words Magnetic stimulation ; Silent period ; Handedness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We performed transcranial magnetic stimulation of the motor cortex in 22 left-handed and 25 right-handed subjects during active contraction of a small hand muscle. Motor evoked potentials had the same latency, amplitude and threshold on both sides of the body, whilst the silent period duration was shorter in the dominant hand. Silent periods elicited by nerve and brainstem stimulation were the same in both hands. Since the latter part of the cortical silent period is due mainly to withdrawal of corticospinal input to spinal motoneurones, we speculate that the results are compatible with the suggestion that tonic contractions of the non-dominant hand are associated with a greater involvement of the corticospinal tract than those of the dominant hand. It also seems likely that there is an asymmetry in the excitability of cortical inhibitory mechanisms with those responsible for the cortical silent period being less excitable in the dominant motor cortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002210050859
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Bioleaching of metallic sulphides withThiobacillus ferrooxidans in the absence of iron (II) (1992)
    Springer
    World journal of microbiology and biotechnology 8 (1992), S. 305-308 
    Details
    ISSN: 1573-0972
    Keywords: Bioleaching ; metallic sulphides ; Thiobacillus ferrooxidans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Bioleaching of metallic sulphides withThiobacillus ferrooxidans in the absence of iron (II) was studied using pure sulphides and mixtures. The direct mode of bacterial action was analysed with respect to sulphide solubility, exposed solid surfaces and bacterial attachment to the solids. Bioleaching of mixed sulphides showed enhancement of metal extraction in comparison with pure sulphides which suggests metal extractions would be better from polymetallic sulphide ores than from similar matrices with only one sulphide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201885
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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