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  • 1
    Electronic Resource
    Electronic Resource
    Intraluminal duodenal diverticulum in a child: incidental onset possibly associated with the ingestion of a foreign body (1999)
    Springer
    European journal of pediatrics 158 (1999), S. 108-110 
    Details
    ISSN: 1432-1076
    Keywords: Key words Intraluminal duodenal diverticulum ; Child ; Foreign body ; Windsock web
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Funnel-type intraluminal duodenal diverticulum (windsock web) is a rare congenital malformation. A 4-year-old boy with vomiting and abdominal pain for several weeks was referred to the hospital. A plain abdominal X-ray on admission disclosed a double bubble sign. Abdominal echography and CT disclosed a foreign body lodged in the alimentary tract. After the foreign body was removed with a fibrescope, endoscopy showed a stenotic descending portion where the foreign body was located. An upper gastro-intestinal contrast study demonstrated a post-bulbar duodenal stenosis with a barium-filled pear-shaped sac in the descending portion of the duodenum. Surgical exploration was done under the diagnosis of windsock web of the duodenum. A simple excision of the web at its base was carried out. A hole 7 mm in diameter was found at the edge of the web. The microscopic appearance of the resected specimen was characterized by the duodenal mucosa with an extensive chronic inflammation lining both sides of the diverticulum and the lack of muscular layer of mucosa. Conclusion If an ingested material is not excreted in the stool, possible clogging in the intestinal tract should always be considered and a further intensive examination is warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004310051028
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Interorganellar gene transfer in bryophytes: the functional nad7 gene is nuclear encoded in Marchantia polymorpha (1997)
    Springer
    Molecular genetics and genomics 256 (1997), S. 589-592 
    Details
    ISSN: 1617-4623
    Keywords: Key words Gene transfer ; NADH: ubiquinone oxidoreductase ; Liverwort ; Signal peptide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nad7 gene, encoding subunit 7 of NADH dehydrogenase, is mitochondrially encoded in seed plants. In the liverwort, Marchantia polymorpha, only a pseudogene is located in the mitochondrial genome. We have now identified the functional nad7 gene copy in the nuclear genome of Marchantia, coding for a polypeptide of 468 amino acids. The nuclear-encoded nad7 has lost the two group II introns present in the mitochondrial pseudogene copy. Instead, a typical nuclear intron is found to split an exon encoding the presumptive mitochondrial targeting signal peptide and the mature subunit 7 of NADH dehydrogenase. These results suggest that RNA-mediated gene transfer from the mitochondrial into the nuclear genome occurs not only in seed plants but also in bryophytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008616
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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