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  • 1
    Electronic Resource
    Electronic Resource
    Nachweis und Identifizierung von insecticiden Phosphor-, Thiophosphor-, Phosphon- und Carbaminsäureestern im biologischen Material (1969)
    Springer
    Archives of toxicology 24 (1969), S. 316-324 
    Details
    ISSN: 1432-0738
    Keywords: Insecticides ; Organophosphates ; Carbamic Esters ; Detection ; Biological Material ; Insecticide ; organische Phosphorverbindungen ; Carbaminsäureester ; Nachweis ; Biologisches Material
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird ein kombiniertes dünnschichtchromatographischenzymatisches Verfahren beschrieben, das es ermöglicht, insecticidwirksame Esterasehemmer in allen biologischen Materialien nebeneinander zu identifizieren und semiquantitativ zu bestimmen. Die Identifizierung wird an Hand der Rf-Werte in verschiedenen mobilen Phasen, dem Auftreten von esterasehemmenden Folgeprodukten sowie aus dem Verhalten gegenüber verschiedenen Aktivierungsverfahren vorgenommen. Mit Hilfe der beschriebenen Aktivierungsverfahren lassen sich auch die nichthemmenden Thionophosphorsäureester sowie die Phosphonsäureester „Trichlorphon“ und „Tribuphon“ mit hoher Empfindlichkeit nachweisen. Das Verfahren ist außer für Phosphorsäureester auch für den Nachweis esterasehemmender Carbaminsäureester anwendbar.
    Notes: Summary A combined TLC-enzymatic method is described which makes possible the simultaneous identification and semi-quantitative determination of cholinesterase-inhibiting insecticides in all types of biological material. Identification is carried out by means of determining thin-layer chromatography Rf-values using different mobile phases, by the appearance of esterase-inhibiting metabolites, as well as by observing reactions in various activation procedures. Utilizing the described activation procedures, non-inhibiting phosphorothionates as well as the phosphonic acid esters Trichlorphon and Butonate are also detectable with a high degree of sensitivity. The combined method enables also the determination of esterase-inhibiting carbamic esters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00577580
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  • 2
    Electronic Resource
    Electronic Resource
    Stenosis and occlusion of the subclavian artery: ultrasonographic and clinical findings (1987)
    Springer
    Journal of neurology 234 (1987), S. 396-400 
    Details
    ISSN: 1432-1459
    Keywords: Subclavian steal syndrome ; Vertebrobasilar insufficiency ; Doppler sonography ; Atherosclerosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Continuous-wave (CW) Doppler sonography has proved to be a reliable tool both to detect subclavian stenosis or occulusion and to detect reversal of blood flow in the vertebral artery. This method is entirely atraumatic and in contrast to angiography allows investigation of asymptomatic patients and provides more representative data for epidemiological studies. The incidence of subclavian stenosis or occlusion was 1.15% among the 23,500 patients examined in our department between 1978 and 1985. Of the 272 patients with unilateral or bilateral subclavian stenosis or occlusion, 54% were asymptomatic with no subjective complaints and were normal upon neurological examination; 29% reported vertebrobasilar transient ischaemic attacks (TIAs), with or without concomitant TIAs or infarction in the vascular territory of the carotid arteries; and 17% complained of symptoms exclusively referring to the region of carotid blood supply. Reversal of blood flow in the ipsilateral vertebral artery was detected in 152 patients (56%). The incidence of neurological symptoms within this group was double that found in patients without steal. None of the patients suffered from permanent vertebrobasilar damage. In most cases, subclavian artery disease was due to atherosclerosis. For 13 patients an inflammatory, iatrogenic, traumatic, or congenital aetiology could be assumed. The marked preponderance of left-sided subclavian stenosis or occlusion, reported by others, could be confirmed among our patients, but was less pronounced for tight stenoses than for occlusions. Mild-to-moderate subclavian stenoses were about equally distributed on each side.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314084
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    Paper (German National Licenses)
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