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  • 1
    Electronic Resource
    Electronic Resource
    Aufnahme und Verteilung von14C-Retinylacetat in Organe und Sinnesgewebe (Innenohr) des Meerschweinchens (1985)
    Springer
    European journal of nutrition 24 (1985), S. 187-196 
    Details
    ISSN: 1436-6215
    Keywords: 14C-Retinylacetat ; Sinneszellgewebe ; Vitamin-A-Verteilung ; HPLC ; Autoradiographie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary The uptake and chemical identification of14C-retinyl acetate in the inner ear of the guinea-pig after oral administration is reported. For methodological reasons the experiment was carried out in vitamin A-deficient guinea-pigs. In the sensory tissues a time-dependent distribution was found similar to that in other organs. The chemical identification shows that the orally administered labeled retinyl acetate can be detected as retinyl palmitate in the membranous structures of the inner ear. This may be an indication for the ability of the inner ear tissues to esterize and probably store the transport form of vitamin A, retinol.
    Notes: Zusammenfassung Es wird über die Aufnahme und chemische Identifizierung von14C-Retinylacetat in das Innenohr des Meerschweinchens nach per oraler Verabreichung berichtet. Die Untersuchung wurde aus methodischen Gründen bei Vitamin-A-mangelernährten Tieren durchgeführt. Es findet sich eine zeitabhängige Verteilung in den Sinnesgeweben, die der anderer Organe gleicht. Die chemische Identifizierung zeigt, daß das als Retinylacetat verabreichte markierte Vitamin A in den membranösen Strukturen des Innenohres in Form des Retinylpalmitats zu finden ist. Dies mag ein Hinweis sein auf die Fähigkeit des Innenohrgewebes, die Transportform des Vitamins A, das Retinol, zu verestern und eventuell auch zu speichern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02019356
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of glycoconjugate expression during development of Meckel's cartilage in the rat (1995)
    Springer
    Anatomy and embryology 191 (1995), S. 47-59 
    Details
    ISSN: 1432-0568
    Keywords: Bone ; Lectins ; Mandible ; Meckel's cartilage ; Rat embryo
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The staining patterns of 24 biotinylated lectins were analyzed in serial sections of the mandible of 13- to 21-day-old rat embryos by means of the avidinbiotin-peroxidase method. A ubiquitous distribution of binding sites was demonstrated after incubation with Con A (Canavalia ensiformis), DSL (Datura stramonium; except bone matrix), and WGA (Triticum vulgare). ECL (Erythrina cristagalli), GSL I (Griffonia simplicifolia), SJA (Saphora japonica), VVL (Vicia villosa), DBA (Dolichus biflorus), UEA I (Ulex europeus), and LTA (Lotus tetragonobolus) were constantly negative. In early stages of development, GSL II (Griffonia simplicifolia II) was a selective marker of prechondral blastema. In contrast, PNA (Arachis hypogaea) did not stain condensing mesenchyme. During chondrogenesis of Meckels's cartilage a general decrease of lectin binding was observed. Mature cartilage matrix was constantly negative. Chondrocytes were marked by the lectins PSA (Pisum sativum), WGA, PHA-E, and PHA-L (Phaseolus vulgaris E and L). A strong GSL II binding was restricted to the mesial-superior region of the perichondrium. In later stages, several lectins revealed significant differences between preskeletal (“central”) areas and the remaining (“peripheral”) mesenchyme. A clear binding reaction was noted in central regions by applying LEA (Lycopersicon esculentum) and STL (Solanum tuberosum), while the peripheral tissue was only faintly stained. Developing bone was specifically marked by succinylated WGA (sWGA). The lectins LCA (Lens culinarus) and RCA (Ricinus communis) bound to fibers and extracellular matrix of the connective tissue. Jacalin (Artocarpus integrifolia) and SBA (Glycine max) binding sites were found in macrophages. Affinity of VAA (Viscum album) increased parallel with maturation of endothelial cells. Specific lectin-binding patterns revealed no correlation with the distribution of glycosaminoglycans. The results demonstrate a general reduction of oligosaccharide structures during development of Meckel's cartilage. From our observations we conclude that intralaminar glucose and/or mannose sequences as well as terminal sialic acid molecules are ubiquitously distributed, while terminal α-fucose was constantly negative. Lectin-binding patterns of macrophages may reflect the presence of specifically linked terminal galactose. Our findings indicate that oligosaccharides terminating in N-acetylglucosamine are bone-specific. The significance of the restricted staining of the perichondrium by GSL II remains to be elucidated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215297
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  • 3
    Electronic Resource
    Electronic Resource
    217. Ranitidin versus Cimetidin in der Kontrolle des intragastralen pH-Wertes bei chirurgischen Intensivpflegepatienten mit Peritonitis und Sepsis — Eine Doppelblindstudie (1984)
    Springer
    Langenbeck's archives of surgery 364 (1984), S. 538-539 
    Details
    ISSN: 1435-2451
    Keywords: Acute gastroduodenal lesions ; Intragastric pH ; Cimetidine ; Ranitidine ; Akute gastroduodenale Läsionen ; Intragastraler pH ; Cimetidin ; Ranitidin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 12 beatmete Intensivpatienten mit Peritonitis bzw. Sepsis wurden in einer prospektiv randomisierten Doppelblindstudie mit 300 mg Ranitidin/d bzw. 2 g Cimetidin/d jeweils über Dauerinfusion behandelt. Beide Untersuchungsgruppen waren hinsichtlich Alter, Geschlecht und Gefährdungsgrad streßinduzierter Blutungen vergleichbar. Durch Ranitidin gelang eine zur Blutungsprophylaxe ausreichende, wenn auch nicht vollständige Kontrolle des intragastralen pH-Wertes. Mit Cimetidin als Monotherapie konnten wir dagegen selbst in einer hohen Dosierung (2 g/d) bei unserem Patientengut keine ausreichende Kontrolle des Magen-pH-Wertes erzielen. Für 3 Patienten erwies sich sogar die Kombination von Cimetidin mit 2 × 10 mg Pirenzepin/d als nicht ausreichend.
    Notes: Summary Twelve patients in an intensive care unit on a respirator who had peritonitis or sepsis were treated with 300 mg/day of ranitidine or 2 g cimetidine/day, which was administered via perfusor infusion under the conditions of a random double-blind study. Both groups under study were comparable with respect to age, sex, and grade risk of stress-induced bleeding. With ranitidine, we were able to control bleeding sufficiently, but not completely control intragastric pH values. With cimetidine as monotherapy, however, even under the high dosage of 2 g/day, we were not successful in controlling intragastric pH. With three patients even the combination of ranitidine and 2 × 10 mg pirenzepine/day did not prove sufficient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01823391
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    Paper (German National Licenses)
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