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  • 1
    Electronic Resource
    Electronic Resource
    Das Verhalten der allgemeinen Intelligenz von Parkinson-Patienten während der l-Dopa-Therapie (1974)
    Springer
    European archives of psychiatry and clinical neuroscience 218 (1974), S. 125-140 
    Details
    ISSN: 1433-8491
    Keywords: Parkinsonism ; Levodopa ; Factor Analytic Concept of Intelligence ; Stability of General Intelligence ; Parkinson-Syndrom ; l-Dopa ; Faktorenanalytisches Intelligenzkonzept ; Stabilität der allgemeinen Intelligenz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Verhalten der allgemeinen Intelligenz von 74 Parkinson-Patienten wurde vor und während einer l-Dopa-Therapie untersucht. Dazu wurden Standardintelligenztests, eine klinisch-neurologische Beurteilung der hirnorganischen Leistungsfähigkeit und eine Selbsteinschätzung von Gedächtnis und Denkfähigkeit durch die Patienten herangezogen. Ausgangspunkt war ein faktorenanalytisches Konzept, in dem die allgemeine Intelligenz durch zwei Faktoren zweiter Ordnung darstellbar wird. Die gefundenen insignifikanten Mittelwertdifferenzen im Verlauf bedeuten, daß die allgemeine Intelligenz in ihren beiden Komponenten während der Therapie praktisch keine Veränderung erfährt. Abweichende Befunde der Literatur betreflten Änderungen von Teilkomponenten der Intelligenz, nicht aber der allgemeinen Intelligenz im Sinne des zugrundegelegten Konzeptes.
    Notes: Summary We investigated features of the general intelligence of 74 patients with Parkinson's disease before and during Levodopa Therapy. The variables used were standardized intelligence tests, neurological ratings of brain performance and patients' self-ratings of memory and thinking ability. We used a factor analytic concept defining general intelligence in the form of two second order factors. The changes in means were insignificant. The conclusion was that both components of general intelligence remain stable during this therapy. Discrepancies between our results and those obtained by other authors who have used intelligence tests are discussed; they seem to have recorded changes in part components (primary factors) rather than general intelligence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00343165
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  • 2
    Electronic Resource
    Electronic Resource
    Zur elektrischen Gleichstromleitfähigkeit von Polyäthylen (1973)
    Springer
    Colloid & polymer science 251 (1973), S. 947-950 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary DC conductivity measurements with the applied field and temperature as parameters have been performed on a low-density polyethylene. The time-dependent charging current cannot be separated into a time-independent conduction current and a superposed dipole-orientation current. The charging current shows a field-dependent thermal activation energy and is interpreted in terms of aRichardson-Schottky-type effect between amorphous and crystalline regions of the polymer. The time dependence is due to two contributions, a dipole orientation and the build-up of a volume space-charge.
    Notes: Zusammenfassung An einem Hochdruckpolyäthylen definierter Herstellung werden Leitfähigkeitsmessungen bezüglich der Parameter Feldstärke und Temperatur durchgeführt. Der zeitabhängige Ladestrom läßt sich nicht einfach in einen konstanten Leitungsstrom und einen überlagerten Dipolorientierungsstrom trennen. Das Verhalten des zeitabhängigen Ladestroms, dem ein feldabhängiger thermisch aktivierter Prozeß zugrunde liegt, wird mit einer ArtRichardson-Schottky- Effekt an den inneren Grenzflächen zwischen amorphen und kristallinen Bereichen erklärt, wobei die Zeitabhängigkeit außer vom überlagerten Dipolorientierungsstrom noch vom Aufbau einer Raumladung im Volumen herrührt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01498924
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  • 3
    Electronic Resource
    Electronic Resource
    Thermisch stimulierte Ströme in Hochdruckpolyäthylen (1973)
    Springer
    Colloid & polymer science 251 (1973), S. 941-946 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary Thermally stimulated currents have been measured in low-density polyethylene in the temperature range from −190 to +40 °C. In this range four peaks are discernable, of which two near −170°C and −135°C are interpreted in terms of electron or hole injection and subsequent detrapping. The depolarisation phenomenon at higher temperatures is strongly sensitive to polarisation temperature and can be explained in terms of dipole orientation.
    Notes: Zusammenfassung Zur Untersuchung des Leitungsmechanismus in Polyäthylen (LDPE) wurden Messungen thermisch stimulierter Ströme im Temperaturbereich von −190 bis +40 °C durchgeführt. Dabei treten, abhängig von der Polarisationstemperatur, bis zu vier, teilweise nur als Schulter ausgeprägte Maxima auf. Zwei Peaks bei tiefer Temperatur, die im wesentlichen unabhängig von der Polarisationstemperatur sind, werden mit Injektion und Trapping von Ladungsträgern (Elektronen oder Löcher) in Verbindung gebracht. Der Hauptpeak bei hoher Temperatur, dessen Erscheinen abhängig von der Polarisationstemperatur ist, kann mit einer Dipolorientierung PE-eigener Dipole erklärt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01498923
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  • 4
    Electronic Resource
    Electronic Resource
    Sur l'inégalité∑ [p i f(p i ) +q i f(q i )] ≦∑ [p i f(q i ) +q i f(p i )] (1974)
    Springer
    Periodica mathematica Hungarica 5 (1974), S. 87-92 
    Details
    ISSN: 1588-2829
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02020542
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  • 5
    Electronic Resource
    Electronic Resource
    Electrophilic Aromatic Substitution of Groups other than Hydrogen. Part II: SN1-Type Desulfonation of 2-Naphthol-1-sulfonic Acid by Diazonium Ions in Aprotic Apolar Solvents. 27th communication on diazo coupling reactions26th communication: Fischer & Zollinger [1]. (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 2146-2153 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rates of formation of 1-(4′-chlorophenylazo-)-2-naphthol by SO3 of release from the π-complex [2-naphthol-1-sulfonate anion … p-chlorobenzenediazonium cation] have been measured in chloroform and in methylene chloride; they are first-order with respect to the complex. They are catalysed by pyridine and co-catalysed by acetic acid. Acids alone, in stoichiometric or higher concentrations, inhibit the reaction. A mechanism is postulated involving proton transfer to the sulfonate group, followed by rearrangement to the σ-complex which, in the catalysed reaction, first loses a proton to the base and then releases SO3, but in the uncatalysed reaction loses SO3H⊕. The function of the co-catalyst (pyridinium ion) is explained (see text). This reaction is - in contrast to electrophilic aromatic substitutions in which the leaving group is a protonan SN1-type re-aromatization of the σ-complex to the product.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550634
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  • 6
    Electronic Resource
    Electronic Resource
    Electrophilic Aromatic Substitution of Groups other than Hydrogen. Part I: Ipso Factors and Rate-Limiting Steps in Dehalogenations by Diazonium Ions. 26th communication on diazo coupling reactions25th communication: Jaecklin, Skrabal & Zollinger [1]. (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 2139-2146 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rates of substitution of the group X in 1-X-2-naphthol-6-sulfonic acids (X = H, Cl, Br, and I) by p-chlorobenzenediazonium ions in aqueous solution have been measured. The rates of the halogenated naphthols relative to that of the parent compound (X = H) are 0.0070:0.0089:0.149 for X = Cl, Br, and I respectively. The reaction of 1-bromo-2-naphthol-6-sulfonic acid is catalysed by thiosulfate ions; the relative rate observed for this compound does not, therefore, represent the ipso factor. It is postulated that in its substitution the release of the electrofugal leaving group (Br⊕) is rate-limiting.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550633
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