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  • 1
    Electronic Resource
    Electronic Resource
    Amyloid in a multiple sclerosis lesion is clearly of Aλ type (2000)
    Springer
    Acta neuropathologica 100 (2000), S. 709-711 
    Details
    ISSN: 1432-0533
    Keywords: Key words Multiple sclerosis ; Aλ amyloid ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In rare multiple sclerosis cases amyloid is deposited in demyelinated plaques. In one such case amyloid was examined immunohistochemically with a panel of antibodies directed against different amyloid types. The amyloid was classified as the Aλ type produced by a local monoclonal B cell population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004010000244
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  • 2
    Electronic Resource
    Electronic Resource
    Histological Study of Lumbar Intervertebral Disc Herniation in Adolescents (2000)
    Springer
    Acta neurochirurgica 142 (2000), S. 1107-1110 
    Details
    ISSN: 0942-0940
    Keywords: Keywords: Disc herniation; lumbar; adolescence; histology.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary ¶ Herniated intervertebral discs are rare in children and adolescents constituting approximately 1–5% of all patients undergoing surgery for lumbar and lumbosacral intervertebral disc herniation. Preceding traumata and congenital anomalities have been reported as important factors for the pathogenesis of intervertebral disc prolapses in young patients. The present histological study is based upon 15 patients with lumbar disc herniation within an age range from 14 to 19 years. Only in one case, was adequate trauma reported. All patients exhibited degenerative changes of the disc, similiar to those observed in adults. These changes were marked in 11 patients (73%).  Thus, as known from adults, also in isolated traumatic disc herniation of adolescence, pre-existing degeneration of the disc has to be considered. If such changes are present, trauma has the significance of only transitory deterioration of the previous disc degeneration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010070037
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  • 3
    Electronic Resource
    Electronic Resource
    Intrachain exciton quenching analysis in conjugated polymers by two-photon spectroscopy (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 116 (2002), S. 3449-3454 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Intrachain exciton quenching in ladder-type polyparaphenylene has been quantified for the first time. Two-phonon absorption and subsequent upconverted photoluminescence of ladder-type polyparaphenylene and polyfluorene has been measured and analyzed with a new theoretical framework for the two-photon absorption saturation. This microscopic analysis determines the number of singlet excitons as a function of the excitation intensity, which is compared to the photoluminescence intensity. The absorption saturation alone perfectly describes the photoluminescence saturation in polyfluorene, whereas in ladder-type polyparaphenylene, exciton–exciton quenching occurs. By measuring in solution, the formation of stacked polymer chains is prevented. Therefore, the quenching is due to intrachain interaction. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1445108
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  • 4
    Electronic Resource
    Electronic Resource
    Two-photon-excited green emission and its dichroic shift of oriented thin-film CdS on glass formed by laser deposition (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 356-358 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The photoluminescence of oriented thin-film CdS on glass formed by laser deposition was investigated employing 200 fs, 1.54 eV laser pulses at room temperature. The ultrafast excitation caused a two-photon absorption process, which results in purely green emission at the band gap. The spectra are fitted very well by the application of the van Roosbroeck–Shockley relation, density of states, and Urbach's rule demonstrating the intrinsic character of the radiative recombination. It is further shown that the energy position of the emission peak depends on the polarization of the impinging laser beam due to the dichroism of the highly oriented films. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1432756
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  • 5
    Electronic Resource
    Electronic Resource
    Photovoltaic hybrid device with broad tunable spectral response achieved by organic/inorganic thin-film heteropairing (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 81 (2002), S. 556-558 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By means of laser deposition, spin casting and vacuum evaporation, optoelectronic hybrid devices were manufactured based upon the thin-film heteropairing of a perylene-derived molecule [di-isoquinoline perylene derivative (DQP)] and CdS. The photovoltaic characteristics of the devices are presented and discussed. We demonstrate that by exploitation of relatively high carrier mobilities in the CdS layer and the high photonic yield and deposition ease of the DQP film, efficient and technologically appealing optoelectronic devices are feasible. In addition, bias dependence of the spectral sensitivity demonstrates the versatility of the introduced device concept in light of photonic sensor applications. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1494117
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  • 6
    Electronic Resource
    Electronic Resource
    Lymphocytic adenohypophysitis mimicking a pituitary macroadenoma (2000)
    Springer
    Neurosurgical review 23 (2000), S. 112-116 
    Details
    ISSN: 1437-2320
    Keywords: Key words Lymphocytic adenohypophysitis ; Pituitary adenoma ; Pituitary surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A 24-year-old woman developed headache and rapidly progressive visual disturbances during the last trimester of her first pregnancy. Magnetic resonance tomography (MRI) of the brain documented an intra- and suprasellar mass lesion. For preservation of vision, transsphenoidal microsurgical decompression was performed. Immediately postoperatively, visual acuity improved and hemianopia resolved. Histological examination yielded the diagnosis of primary lymphocytic adenohypophysitis. This is a rare inflammatory pituitary disease. There are no typical clinical, laboratory, or radiological findings that allow precise preoperative diagnosis. Even though this autoimmune disorder is principally steroid-responsive, an improvement of visual disturbances under steroid therapy cannot be predicted. Therefore, surgery is justified not only to establish the diagnosis, but also to restore vision by decompression of the optic nerves and the chiasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101430050011
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