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  • 1
    Electronic Resource
    Electronic Resource
    13C and31P NMR spectroscopic studies on glucose metabolism inTribolium confusum (1993)
    Springer
    Entomologia experimentalis et applicata 66 (1993), S. 269-274 
    Details
    ISSN: 1570-7458
    Keywords: 13C-NMR ; 31P-NMR ; Nuclear magnetic resonance ; Tribolium confusum ; Glucose metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nuclear magnetic resonance (NMR) technology was applied to study the glucose metabolism inTribolium confusum (Coleoptera).13C signals of D-(1-13C)glucose eaten by beetles were clearly detected in such metabolites of the glucose metabolism as glycogen, trehalose, triacylglycerol, alanine and proline by13C-NMR. After glucose feeding the31P-NMR spectra ofT. confusum showed the signal intensity increases in arginine-phosphate, sugar-phosphate and uridine diphosphoglucose. The results demonstrated the potential of NMR analysis for the study of glucose metabolism inT. confusum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383182
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Age- and sex-dependent change in stratum corneum sphingolipids (1993)
    Springer
    Archives of dermatological research 285 (1993), S. 415-417 
    Details
    ISSN: 1432-069X
    Keywords: Sphingolipids ; Ceramides ; Aging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We measured six stratum corneum sphingolipid species (ceramides 1–6) in 26 males and 27 females, and found a significant change in their percentage composition only among female subjects of different age groups. There was a significant increase in ceramide 1 and 2 with a corresponding decrease in ceramide 3 and 6 from prepubertal age to adulthood. Thereafter the ratio of ceramide 2 to total sphingolipids decreased with age in contrast to ceramide 3 which showed an increase. Such a pattern of change in the aging population is different from that observed in scaly skin experimentally induced by tape stripping. The present results suggest a significant influence of female hormones on the composition of stratum corneum sphingolipids. Moreover, the different patterns of change in sphingolipid composition of stratum corneum lipids between scales from inflammatory skin and those from aged skin also suggest that epidermal biosynthesis of sphingolipids is influenced by epidermal proliferative activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372135
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    Paper (German National Licenses)
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