Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1985-1989  (3)
  • 1
    ISSN: 1432-1106
    Keywords: Supplementary motor area (SMA) ; Cingulate cortex ; Premotor areas ; Medial wall of the hemisphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We injected wheat germ agglutinin conjugated to horseradish peroxidase into different segments of the spinal cord in order to examine the topographic organization of corticospinal projections from the medial wall of the hemisphere. We observed that substantial projections to the spinal cord originate not only from the supplementary motor area (SMA) in area 6, but also from 2 regions within the cingulate sulcus. The distribution of labeled neurons following tracer injections into different spinal cord segments indicates that corticospinal projections from the SMA and from the 2 cingulate regions are somatotopically organized. These findings together with other recent anatomical observations suggest that the corticospinal projections from the medial wall of the hemisphere provide the basal ganglia and limbic system with a somatotopically organized access to spinal cord mechanisms.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electrochemical behaviour of graphite-epoxy composite materials (GECM) in neutral 3.5% aqueous solutions of NaCl has been investigated. Two types of composite and pure graphite have been studied. The composite material shows a high value of electrode potential ranging between −40 and +70 mV versus SCE, and behaves as cathode when coupled to alloys. The effects of chloride ion concentration, pH, temperature, nature of cations and anions, and resistance of the epoxy matrix to environmental agents on the rate of oxygen reduction reaction on GECM electrodes are reported. Moreover, polarization studies performed on GECM-aluminium alloy couples show that polarization occurs mainly at the composite interface. From potentiostatic anodic polarization curves of different alloys and cathodic polarization curves of GECM, the initial galvanic corrosion current densities for most alloy-GECM couples of interest in the aerospace industries have been obtained. These values are strongly affected by environment durability of the epoxy matrix and variation by one or two orders of magnitude are observed. Despite the latter discrepancy, these data can be helpful in the assesment of a galvanic series based on galvanic current density for alloy-GECM joints.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 2077-2089 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report on our IR–IR double resonance experiment study of the excited stretching state of silane involving two or three vibrational quanta, and on the interpretation of our results by using the local mode model. The DR spectra were recorded by means of two separately tunable IR beams, one of which was used to pump selected lines inside the υ3 or 2υ3 IR bands, and the other (the probe) to observe transitions from the pumped vibration–rotation states. We characterized 7 out of the 14 vibrational states belonging to these manifolds for the first time, and the A1+F2 diad localized previously at 6362 cm−1 has been studied with much higher accuracy than before. Only the two highest states of the N=3 manifold are still unknown. The vibrational energies are very well reproduced by the local mode model ((approximately-equal-to)1 cm−1 rms deviation), and the harmonic interbond couplings have been determined more precisely than before. The rotational structures of the excited states are also well accounted for by Champion's theory of vibration–rotation coupling in Td, adapted to the description of stretching vibrations in terms of local modes. More high resolution (0.01 cm−1 or better) data are needed however to fully assess this point.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...