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  • 1
    Electronic Resource
    Electronic Resource
    Spread of the dorsal root potentials in lower lumbar, sacral and upper caudal spinal cord (1979)
    Springer
    Pflügers Archiv 381 (1979), S. 201-207 
    Details
    ISSN: 1432-2013
    Keywords: Spread of dorsal root potentials ; Presynaptic inhibition ; Sacral spinal cord ; Caudal spinal cord
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Spread of the dorsal root potentials (DRPs) along lower lumbar, sacral, and upper caudal segments of the cord has been studied in spinal cats. Ipsilateral DRPs produced by stimulation of L5 dorsal root with single volleys and recorded in consecutively more and more caudal segments gradually decrease and after passing 6 segments attain 47% of amplitude observed in L6 dorsal root. DRPs spreading cranially from Ca2 dorsal root along 6 segments decrease virtually to zero. Depolarizations spreading caudally show greater conduction velocity, are maintained during repetitive stimulation in larger number of segments and display larger occlusion than DRPs spreading cranially. These findings show the preponderance of depolarization spreading from lower lumbar cord to sacral and caudal segments over that produced in caudal parts of the cord and spreading cranially. The extent of cranial spread of DRPs, appearance of sudden increases in latency of DRPs and changes in effectiveness of stimulation in maintaining prolonged depolarization show correlations with neuronal arrangement of the substantia gelatinosa. This suggests that substantia gelatinosa subserves the spread of DRPs along the spinal cord.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00583250
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Quantum chemical calculations of molecular energies in crystals of two polymorphs of m-nitrophenol with respect to ESR experiment (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 6 (1996), S. 307-311 
    Details
    ISSN: 1057-9257
    Keywords: quantum chemical semiempirical calculations ; m-nitrophenol ; polymorphic forms ; hyperpolarisabilities ; electron affinities ; electronic transitions ; spin densities ; hydrogen bonding ; proton transfer ; paramagnetic species ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Energy differences between m-nitrophenol (mNP) molecules in the gas phase and in two crystalline polymorphic forms - the optically non-linear orthorhombic and the centro-symmetric monoclinic form - have been found by the semiempirical all-valence modified INDO method. The calculations were performed for neutral molecules and for possible ions as well as for deprotonated molecules in the three phases. The values obtained for electron affinities, hyperpolarisabilities, electronic transition energies and spin desities on atoms in open-shell structures indicate that paramagnetic species are most favoured in the orthorhombic polymorph. This tendency corroborates our ESR results on the generation of unpaired spins by near-infrared excitation.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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