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  • 1
    Electronic Resource
    Electronic Resource
    A direct observation of the two-dimensional π-d bands for adsorbed CO (1987)
    Springer
    Applied physics 44 (1987), S. 83-86 
    Details
    ISSN: 1432-0630
    Keywords: 68.35 ; 73.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Angle-resolved photoelectron spectroscopy has been utilized to measure the dispersion and symmetry of the spectral features in thed band region of Ni induced by the adsorption of CO. Very strong alteration of thed-band emission characteristics are observed when CO is adsorbed onto Ni(110) in the (2×1) p2mg ordered phase. The high density and unique symmetry of this overlayer allows an unambigeous identification of these spectral features as the two-dimensionalπ-d surface bands induced by the chemical bond of CO to Ni, i.e. the CO 2π-Ni 3d interaction. These results make it possible to reconcile other measurements and to generate a more definitive picture of how the Blyholder model for CO-metal interaction should be applied to surfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617895
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Two cases of cerebral toxoplasmosis in AIDS patients mimicking HIV-related dementia (1991)
    Springer
    Journal of neurology 238 (1991), S. 439-442 
    Details
    ISSN: 1432-1459
    Keywords: AIDS ; Cerebral toxoplasmosis ; Electrophysiological findings ; Magnetic resonance imaging ; Dementia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two unusual cases of cerebral toxoplasmosis in AIDS patients are presented. Two homosexual males aged 33 and 52 years in CDC stage IV C1 complained of memory loss during the past 6 months, as well as weight loss and mild fever. They showed severe intellectual deterioration and discrete basal ganglia dysfunction. Motor performance and cognitive function as well as the conventional EEG findings were grossly abnormal. MRI was normal in the younger patient but showed signalintensive zones in the basal ganglia and cortical atrophy in the older one. CSF and serological antibody tests were normal; immunological function was severely impaired. The patients were diagnosed as late “HIV-related dementia”. Both deteriorated rapidly and died within a few weeks. Neuropathological examination revealed histologically severe Toxoplasma gondii encephalitis, involving the basal ganglia in particular. It is concluded that in AIDS patients with a severely impaired immune status cerebral opportunistic infection may present as dementia with mild basal ganglia impairment in the absence of other focal neurological signs or the characteristic radiological findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314650
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    Paper (German National Licenses)
    Fulltext
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