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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 64 (1995), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: A full-length cDNA encoding a major structural glycoprotein of trout CNS myelin (IP1) was cloned and sequenced. The deduced amino acid sequence exhibited a significant structural homology with the P0 proteins of rat PNS and shark CNS. Sequence conservation was strongest in the extracellular domain, and it included the position of the two cysteine residues required for stabilization of an immunoglobulin-like secondary structure as well as those of the single N-glycosylation acceptor site. The cytoplasmic domain was shorter by 38 amino acids than those of rat and shark P0 and except for a high proportion of basic amino acids did not show any appreciable sequence homology. A single mRNA species of 2 kb was identified by northern blotting, which was expressed in brain tissue but not in liver. By in situ hybridization a selective labeling of myelinating glial cells in the trout CNS and PNS was revealed. The developmental appearance of the IP1 transcript closely coincided with a period of active myelin deposition in most regions of the trout brain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 3 (1984), S. 572-578 
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods 168 (1980), S. 251-257 
    ISSN: 0029-554X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods 181 (1981), S. 199-204 
    ISSN: 0029-554X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 311 (1982), S. 252-258 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird ein Verfahren zur Präparation von Spurenkonzentrat-Targets für die Multi-Elementbestimmung durch protoneninduzierte Röntgenemissions-Spektrometrie (PIXE) beschrieben. Dazu werden die Spuren Ag, Bi, Cd, Co, Cu, Fe, Hg, In, Mn, Ni, Pb, Pd, Tl und Zn als Diethyldithiocarbamidat-Chelate mit Hilfe einer Kollektor-Fällung angereichert. Target ist ein auf einer Plexiglas-Unterlage fixiertes Membranfilter mit der abfiltrierten Kollektorschicht. Die Targetmaterialien wurden im Hinblick auf eine möglichst geringe Blindwertbelastung ausgesucht. Als Kollektorelement wird Molybdän verwendet, dessen Röntgenlinien die Bestimmung der Spuren nicht stören und das zugleich als innerer Standard zur Korrektur von Ungleichmäßigkeiten in der Dicke der Kollektorschicht dient. Die Anreicherungsausbeuten der Mehrzahl der eingesetzten Elemente ist 〉 95%; die relative Standardabweichung des vollständigen Verbundverfahrens liegt unter 10 %. Es wurden Nachweisgrenzen (3 σ) ermittelt, die — je nach Element — zwischen 0,05 und 1 μg pro Target liegen. Die Richtigkeit des Verfahrens wurde an wäßrigen Modell-Analysenproben mit Hilfe unabhängiger Verfahren sichergestellt.
    Notes: Summary A procedure is described for the preparation of trace concentrate targets for a multi-element determination by proton induced X-ray emission spectroscopy (PIXE). Traces such as Ag, Bi, Cd, Co, Cu, Fe, Hg, In, Mn, Ni, Pb, Pd, Tl and Zn are preconcentrated as diethyldithiocarbamidate chelates by use of a collector precipitation. The target in this procedure is a membrane filter with the separated collector layer which is fixed to an acrylic glass support. The target materials were selected with regard to extremely low blanks. As collector element molybdenum is used, whose X-ray signals cause no measurable disturbances on the trace determination and which simultaneously serves as an internal standard to correct irregularities in the thickness of the collector layer. The recoveries of most of the investigated elements are 〉 95%; the relative standard deviation of the complete analytical procedure is smaller than 10%. Depending on the element, the limit of detection (3 σ) was found to vary between 0.05 and 1 μg regarded to the whole target. The accuracy of the method was verified by independent determination methods using models of water samples.
    Type of Medium: Electronic Resource
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