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  • 1
    Electronic Resource
    Electronic Resource
    Writing erasable metallic patterns in insulating AlxGa1−xAs:DX (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 65 (1994), S. 1802-1804 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have optically written persistent but erasable metallic features in insulating epilayers of AlxGa1−xAs doped with Si and Se, which form DX centers. The photocarriers, which remain in the AlxGa1−xAs layer, move freely in the conduction band but are confined to the exposed regions. We demonstrate this confinement by optical excitation in a striped pattern; the resulting modulation of the free carrier density is evinced by an anisotropy of the sample conductance parallel and perpendicular to the stripes. The anisotropy, like the photoconductivity itself, is persistent at low temperatures. Erasure is achieved by thermal annealing. We estimate that features can be written with better than 1000 A(ring) resolution. © 1994 American Institue of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.113001
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  • 2
    Electronic Resource
    Electronic Resource
    Characteristics of the septohippocampal cholinergic GABA-ergic neurons using retrograde marker and immunochemical tests (1994)
    Springer
    Bulletin of experimental biology and medicine 117 (1994), S. 142-144 
    Details
    ISSN: 1573-8221
    Keywords: mouse hippocampus ; cholinergic and GABA-ergic neurons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract It is shown that a large number of immunopositive neurons possess hippocampal projections; there are many immunonegative cells on sections as well. The correlation between choline acetyltransferase-and parvalbumin-positive neurons and retrograde and double-labeled neurons is demonstrated to be much the same, thus favoring the method used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02444126
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  • 3
    Electronic Resource
    Electronic Resource
    Serumspiegel und organablagerungen vonΒ 2-mikroglobulin bei dialysepatienten (1990)
    Springer
    Journal of molecular medicine 68 (1990), S. 1150-1155 
    Details
    ISSN: 1432-1440
    Keywords: Β 2-Mikroglobulin ; AB-Amyloid ; Dialysis ; Arthropathy ; Spondylarthropathy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In radioimmunological estimation ofΒ 2-microglobulin (Β 2m) significant higher serum values were found in 36 dialysis patients (44.4±20.3 mg/l) in comparison with healthy probands (1.5±0.2 mg/l). A significant relation to the duration of dialysis, diuresis, symptoms of the musculo-skeletal system, but not to radiologic changes or bone biopsy findings could be seen. Post mortem examinations carried out in 21 dialysis patients revealed AB-amyloid depositis in synovial tissue of different joints (particularly shoulder and hip joint) or intervertebral discs in eight patients (age 48 to 73 years, dialysis duration less than four years) without correlation to serumΒ 2m level or radiographically suspect areas. In the tissue of cervical spine or intervertebral discs of two patients suffering from destructive spondylarthropathy no amyloid could be detected. These results suggest that AB-amyloid may occur in elderly patients early in the course of hemodialysis and may be asymptomatic in most cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01798067
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  • 4
    Electronic Resource
    Electronic Resource
    Generalized amyloidosis from β2-microglobulin, with caecal perforation after long-term haemodialysis (1991)
    Springer
    Virchows Archiv 419 (1991), S. 349-353 
    Details
    ISSN: 1432-2307
    Keywords: Long-term haemodialysis ; β 2-Microglobulin ; Derived amyloidosis ; Caecal perforation ; Pathological hip fracture ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 73-year-old man with chronic renal failure of undetermined aetiology had received haemodialysis for 12 years when he died of acute purulent peritonitis due to caecal perforation. Amyloid deposits detected in a cystic bone lesion in the left hip had caused a pathological fracture 17 days before death. At autopsy, extensive amyloid deposits were found in the osteoarticular system, in the cartilaginous surface and the capsular tissue of joints, ligaments, vertebral discs and bone. In addition, vascular amyloid deposits were diagnosed in the heart, kidneys, testes, lungs, skin and in the gastrointestinal tract. A special feature of this case were interstitial amyloid deposits forming a fine-meshed structure in the myocardium and plate-like deposits in the gastrointestinal tract. Immunohistochemically, all these deposits reacted strongly with antibody to humanβ 2-microglobulin but showed no reaction with antibodies to AA, Alambda, A-kappa and AF. The present case demonstrates that extra-osteoarticular manifestations of AB-amyloidosis can cause serious complications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606526
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  • 5
    Electronic Resource
    Electronic Resource
    Radiological assessment of duodenal calibre in congenital duodenal obstruction (1992)
    Springer
    Pediatric radiology 22 (1992), S. 451-453 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A review of barium meal studies in 32 cases of congenital intrinsic duodenal obstruction (CDO) from the Adelaide Childrens Hospital was performed to assess and measure pre and post operative duodenal dilatation. Comparisons were made with a group of 153 normal barium studies from the same Hospital with a view to quantifying normal and abnormal proximal duodenal calibre. Duodenal size was expressed as a ratio D1/L1, (diameter of 1st part of duodenum/height of first lumbar vertebra). In this study a normal range of duodenal diameter was found to be 0.90 to 1.62 (+/−2 SD from mean), with a mean of 1.26. The CDO patients recorded a range of postoperative ratios on first follow-up barium studies of between 1.2 and 4.5 with a mean of 2.28. Where serial studies had been performed, duodenal diameter was found to show some decrease in size postoperatively. In patients who underwent surgery for membrane obstruction there was a trend towards normalisation of duodenal diameter over time, compared with the atresia group. However, this difference did not reach statistical significance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02013510
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  • 6
    Electronic Resource
    Electronic Resource
    Immunological analysis (1990)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 337 (1990), S. 97-103 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325728
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