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  • 1
    Electronic Resource
    Electronic Resource
    Zum Nachweis von Morphin und Codein in Blutproben mit GC/MS (NCI und PCI) und zur Unterscheidung einer Codeinaufnahme von Heroin- oder Morphinkonsum (1990)
    Springer
    International journal of legal medicine 103 (1990), S. 513-521 
    Details
    ISSN: 1437-1596
    Keywords: Morphine, examination in blood samples ; Codeine, examination in blood samples ; Differentiation of morphine from codeine abuse ; Morphin, Nachweis in Blutproben ; Codein, Nachweis in Blutproben ; Heroinkonsum, Unterscheidung von Codeinaufnahme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Morphin und Codein wurde mittels C18-Säulenextrak-ktion isoliert und mit Pentafluorpropionsäureanhydrid (PFPA) derivatisiert. Die PFPA-Derivate wurden gaschromatographisch und massenspektrometrisch untersucht und hinsichtlich ihrer optimalen Nachweismöglichkeit verglichen. Aufgrund unserer Untersuchungsergebnisse ist die C18-Säulenex-traktion in Kombination mit der negativ-chemischen-Ionisation (NCI) besonders zum Nachweis von derivatisiertem Codein und Morphin geeignet. Die Bestimmungsgrenze liegt derzeit bei etwa 2 bis 5 μg Morphin oder Codein pro Liter Blut.
    Notes: Summary Morphine and codeine were isolated from blood with C18 Bond Elut columns and derivatised with pentafluoropropionic anhydride (PFPA). The PFPA-derivatives were examined by means of gas chromatography/mass spectrometry using electron impact and chemical ionisation (positive and negative mode). The negative chemical ionisation, as most sensitive, was applied for the quantitation of both examined substances in forensic blood samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00209157
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zum Nachweis von Morphin und Codein in Blutproben mit GC/MS (NCI und PCI) und zur Unterscheidung einer Codeinaufnahme von Heroino- der Morphinkonsum (1990)
    Springer
    International journal of legal medicine 103 (1990), S. 513-521 
    Details
    ISSN: 1437-1596
    Keywords: Morphine, examination in blood samples ; Codeine, examination in blood samples ; Differentiation of morphine from codeine abuse ; Morphin, Nachweis in Blutproben ; Codein, Nachweis in Blutproben ; Heroinkonsum, Unterscheidung von Codeinaufnahme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Morphin und Codein wurde mittels C18-Säulenextraktion isoliert und mit Pentafluorpropionsäureanhydrid (PFPA) derivatisiert. Die PFPA-Derivate wurden gaschromatographisch und massenspektrometrisch untersucht und hinsichtlich ihrer optimalen Nachweismöglichkeit verglichen. Aufgrund unserer Untersuchungsergebnisse ist die C18-Säulenextraktion in Kombination mit der negativ-chemischen-Ionisation (NCI) besonders zum Nachweis von derivatisiertem Codein und Morphin geeignet. Die Bestimmungsgrenze liegt derzeit bei etwa 2 bis 5 μg Morphin oder Codein pro Liter Blut.
    Notes: Summary Morphine and codeine were isolated from blood with C18 Bond Elut columns and derivatised with pentafluoropropionic anhydride (PFPA). The PFPA-derivatives were examined by means of gas chromatography/mass spectrometry using electron impact and chemical ionisation (positive and negative mode). The negative chemical ionisation, as most sensitive, was applied for the quantitation of both examined substances in forensic blood samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01254403
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Immunocytochemical evidence for intragranular processing of pro-opiomelanocortin in the melanotropic cells of the rabbit (1985)
    Springer
    Cell & tissue research 242 (1985), S. 365-370 
    Details
    ISSN: 1432-0878
    Keywords: Melanotrophs ; Immunogold technique ; Secretory vesicles ; γ3-MSH ; α-MSH ; Endorphins ; Rabbit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The immunogold technique, employing antisera with clear-cut specificities, was used to localise different processing stages of pro-opiomelanocortin (POMC) in rabbit melanotropic cells. While the antiserum against γ 3-MSH labelled all the secretory granules including intrasaccular condensations in the Golgi apparatus, antisera against α-MSH only labelled extra-Golgi secretory vesicles (SV). All extra-Golgi SV were likewise labelled with the three antisera against α-MSH used, despite their different specificities for the desacetylated, N-acetylated or C-amidated forms of the peptide. The antibody against β-endorphin also labelled the extra-Golgi SV, while only some SV were labelled with the antibody against γ-endorphin. These results correlate with biochemical data in favour of mainly — if not exclusively — intragranular processing of POMC. Except for γ3-MSH, the cleavage of which could coincide with Golgi packaging of secretory material, other post-translational modifications of the precursor seem to occur when SV are discharged outside the Golgi area. The cleavage of γ-endorphin appears to be a later step in POMC processing, occurring in some mature SV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214549
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Immunocytochemical evidence of intragranular acetylation of α-MSH in the melanotrophic cells of the rabbit (1983)
    Springer
    Cell & tissue research 230 (1983), S. 511-515 
    Details
    ISSN: 1432-0878
    Keywords: Melanotrophs ; Immuno-gold technique ; Secretory vesicles ; γ 3-MSH ; α-MSH ; Acetylation ; Rabbit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Melanotrophic cells of the pars intermedia of the rabbit were studied at the electron-microscopic level by means of the immuno-gold technique with the use of antisera against γ 3-MSH and α-MSH. Both antibodies labelled all secretory vesicles stored in the peripheral cytoplasm, but secretory vesicles and intrasaccular condensations in the Golgi area reacting for γ 3-MSH were not labelled with the antibody against α-MSH. Since this antibody appears to recognise only the acetylated form of α-MSH, the present observations suggest that acetylation occurs at a stage subsequent to the Golgi packaging, during maturation of the secretory vesicles. Thus, the morphological evidence supports biochemical data in favour of intragranular processing of opiomelanocortin in melanotrophic cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216197
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    Paper (German National Licenses)
    Fulltext
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