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  • Chemistry  (12)
  • Detection  (1)
  • Doppler sonography  (1)
  • 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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  • 3
    Electronic Resource
    Electronic Resource
    Komplexone V. Die Äthylendiamin-tetraessigsäure (1947)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 30 (1947), S. 1798-1804 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19470300649
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  • 4
    Electronic Resource
    Electronic Resource
    Komplexone XVII. Die Diaminocyclohexan-N,N′-Tetraessigsäuren als Komplexbildner für Erdalkalien (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1682-1689 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Von den N,N′-Tetraessigsäuren der drei Diaminocyclohexane wurden die Aciditätskonstanten sowie die Bildungskonstanten der Ca- und Mg-Komplexe ermittelt.1. Die Aciditätskonstanten zeigen keine grossen Unterschiede gegenüber denjenigen der entsprechenden Tetraessigsäuren der offenkettigen Polymethylendiamine. Auffallend sind einzig die grossen Werte für PK2 und PK4 der 1,2-Verbindung, die darauf hinweisen, dass die vier Carboxylgruppen sich hier räumlich besonders nahe sind und sich eine Wasserstoffbrücke zwischen den beiden Stickstoffatomen ausbilden kann.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320539
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  • 5
    Electronic Resource
    Electronic Resource
    Über neutralziehende tricyclische und pentacyclische Metallkomplex-azo-Farbstoffe (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 70 (1958), S. 222-231 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden neue tricyclisch und pentacyclisch metallisierbare Azosysteme und deren Metallkomplexe beschrieben. Die Säurestabilität der Komplexe wird untersucht und ihre Eignung als neutralziehende Wollfarbstoffe diskutiert. Dabei werden die gleichen konstitutionellen Regelmäßigkeiten wie bei den bekannten 2:1-Komplexfarbstoffen beobachtet: Fehlen der Sulfonsäure-Gruppe, einfache negative Ladung, koordinativ abgesättigter Zustand des Metallatoms, räumlicher Aufbau und abgewogene Hydrophilie der Komplexmolekel.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19580700806
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  • 6
    Electronic Resource
    Electronic Resource
    Konstitution und Reaktionsfähigkeit von Trichlor-pyrimidylamino-Verbindungen (1962)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 1683-1698 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2,4,5,6-Tetrachlorpyrimidin wurde mit Ammoniak, aliphatischen und aromatischen Aminen umgesetzt und es konnte gezeigt werden, dass dabei fast ausschliesslich das Chlor in 4-Stellung des Pyrimidinrings substituiert wird.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19620450535
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  • 7
    Electronic Resource
    Electronic Resource
    Über eine neue Synthese von UracilderivatenHerrn Prof. Dr. E. Ziegler, Universität Graz, zum 60. Geburtstag gewidmet (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 1039-1043 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: When N,N-dialkylamide dimethylsulfate adducts are reacted with cyanoacetyl urea or carbethoxy acetyl urea, the corresponding dialkylamino alkylidene derivatives are formed which cyclize to substituted uracils in the presence of a strong base. When the adducts of cyclic amides are used, the lactam ring is opened simultaneously on cyclisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550329
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  • 8
    Electronic Resource
    Electronic Resource
    Komplexone XXII. Die Kinetik der Komplexbildung: Der Austausch des Y-4 zwischen Cd+2 und Cu+2 (1952)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 35 (1952), S. 485-497 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mechanism of the reaction between cupric ion and the cadmium complex of ethylenediamine tetraacetic acid (= H4Y) has been studied. The reaction proceeds simultaneously via four different reaction paths brought about through the collision of the cation Cu+2 with the anions CdY-2, CdHY-, HY-3, H2Y-2 which are in permanent equilibrium with each other. The rate constants of these four bimolecular reactions have been evaluated and discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19520350214
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  • 9
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit Polyaminen VIII: Äthylendiamin und Silber (1952)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 35 (1952), S. 2337-2343 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In solutions containing ethylenediamine „en“, and Silver(I), the complexes: AgHen+2, Ag(en)+, Ag2(en)+2 Ag(en)+2 and, surprisingly, Ag2(en)2+2 are formed. The stability constants of these complexes have been evaluated. The existence of the dimeric form of Ag(en)+, probably a 10-membered ring compound, has been prooved also with cryoscopic measurements, using the cristalline sulfate: [Ag2en2]SO4.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19520350720
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  • 10
    Electronic Resource
    Electronic Resource
    Komplexone XII. Die Homologen der Äthylendiamin-tetraessigsäure und ihre Erdalkalikomplexe (1948)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 31 (1948), S. 1029-1048 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Von den Polymethylendiamin-tetraessigsäiuren: (HOOC—CH2)2—N—(CH2)n—N—(CH2—COOH)2 mit n = 2, 3, 4, 5 werden die Ionisationskonstanten und die Bildungskonstanten der Komplexe mit Mg, Ca, Sr und Ba in O, l-n. KCl als Lösungsmittel konstanter ionaler Stärke mitgeteilt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19480310407
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