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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 34 (1992), S. 520-523 
    ISSN: 1432-1920
    Keywords: Computed tomography ; Paranasal sinuses ; Fungus ; Aspergillosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The CT appearances of 13 cases of pathologically proven aspergillosis involving paranasal sinuses were reviewed. Symptoms included rhinorrhea, nasal obstruction, headache, facial pain and foul smell from the nose. At operation, these lesions appeared yellowish, brownish, grey or black in colour, and contained dirty or muddy material. Microscopic examination of the tissue removed showed anAspergillus ball with chronic inflammation but without invasion of the nasal or sinus mucosa in 6 cases, and tissue invasion with necrosis and inflammation in 7. The structures involved, in order of frequency, were: maxillary sinus, nasal cavity, ethmoid sinus, orbit and cavernous sinus. The orbit was involved in 2 cases, therefore categorized as invasive; the other 11 cases were non-invasive as judged by CT. Calcification was seen in the lesions of 9 cases. In most cases the adjacent bony structures showed areas of erosion and sclerosis. Aspergillosis should be suspected in the presence of a mass in the paranasal sinuses or nasal cavity with calcification within it, which may not appear solid or dense and is separate from the walls of the sinus.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric radiology 23 (1993), S. 200-201 
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The term “seat belt syndrome” has been used to describe injuries to the abdominal viscera caused by seat belts during car accidents. These injuries are usually sustained as a result of the rapid deceleration that occurs in front-end collisions, with the consequent compression of the abdominal viscera. The spectrum of injuries includes intestinal perforation or stenosis, mesenteric disruption, and lumbar fracture-dislocation. We present an uncommon case of obstructive herniation in a 2-year-old girl which we believe was due to improper use of a seat belt.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 23 (1993), S. 387-389 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1572-879X
    Keywords: Modified clay catalyst ; “clayzic” ; catalyst poisoning ; chelation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Electrophilic substitutions on aromatics such as C6H5X often lead to mixtures of the ortho- and para-disubstituted products C6H4XY. The former can chelate a metallic center and hence be a potential catalyst inactivator, whenever the (X, Y) substituents have atoms with lone pairs. This general principle operates in the Friedel-Crafts acylation of anisole, a reaction of industrial importance.
    Type of Medium: Electronic Resource
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