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  • 2015-2019
  • 1975-1979  (3)
  • 1930-1934  (1)
  • Chemistry  (3)
  • Orotic acid  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 53 (1977), S. 73-78 
    ISSN: 1432-2072
    Keywords: Orotic acid ; Pirazetam ; EEG ; Evoked potentials ; PTP ; Cortex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In order to obtain further evidence of the pharmacological effects of retention-facilitating substances, the influence of sodium-orotate, methylglucamine orotate, and pirazetam on the bioelectrical activity of central nervous system structures were studied. Sodium orotate showed no influence on the cortical and hippocampal spontaneous EEGs of conscious nonimmobilized rabbits. The amplitude of the first surface-positive wave of the cortical evoked potential that was elicited by stimulation of tooth pulp was, however, significantly increased in long-lasting terms by both pirazetam and the two salts of orotic acid. Similarly, the three substances also influenced the changes in excitability induced by PTP of tooth pulp. The findings suggest that these chemicals facilitate in nonspecific manner responses to externally applied stimuli through central structures. The relationships between the altered stimulus response and the retention-facilitating action of these substances are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 291-300 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Directed Synthesis of Sulfinato-O and -S Complex of Transition Metals, XI. Linkage Isomerism in Sulfinato Complexes of Zinc(II)Starting from the sulfinato-O, O′ complexes (RSO2)2Zn(OH2)2(1a, b) the mono-, bis-, and tris(2, 2′-bipyridyl) complexes 2a, b, 3a, b, and 4a, b are produced according to equation (1) by stepwise addition of 2, 2′-bipyridyl. In the case of the bis(2, 2′-bipyridyl) complexes 3a, b the linkage-isomeric sulfinato-O and -S complexes 3aO, 3bO, and 3aS, 3bS are obtained. From 4a, b 1 mole of 2, 2′-bipyridyl can be eliminated reversibly with acetone according to equation (7) with formation of 3aO and 3aO. The newly prepared compounds were characterized on the basis of their i. r. spectra. In the case of 4a, b DTA, TG, and DTG measurements were carried out.
    Notes: Gemäß Gl. (1) gelingt, ausgehend von den Sulfinato-O, O′-Komplexen (RSO2)2zn(OH2)2 (1a, b), die schrittweise Addition von 2,2′-Bipyridyl, wobei die Mono-, Bis-und Tris(2,2′-bipyridyl)-Komplexe 2a, b, 3a, b und 4a, b entstehen. Im Falle der Bis(2,2′-bipyridyl)-Komplexe 3a, b wurden die bindungsisomeren Sulfinato-O-und-S-Komplexe 3aO, 3bO und 3aS, 3bs erhalten. Aus 4a, b läβt sich mit Aceton reversibel ein mol 2, 2′-Bipyridyl gemäß Gl. (7) unter Bildung von 3aO und 3bO abspalten /die neu dargestellten Verbindungen werden IR-spektroskopisch charakterisiert. Im Falle von 4a, b sind DTA-, TG- und DTG-Messungen durchgeführt worden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 190 (1930), S. 270-276 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Neben den1 Chlor-1-fluorid besteht auch ein Chlor-3-fluorid, welches durch Erhitzen von CI2 oder CIF mit überschüssigem F2 dar- gestellt wird. Die umkehrbare Reaktion CIF + F2 ⇆ CIF3 führt zu einem Gleichgewicht, in dem bei 250° Zahl der CIF-Moleküle ein Mehrfaches der CIF3-Moleküle ist. Die Zusammensetzung des neuen Fluorids is durch Analysen und Dichtebestimmungen sichergestellt. Seine physikalischen und chemischen Eigenschaften werden mit - geteilt.Besonders bemerkenswert ist die Lebhaftigkeit und die Mannigfaltigkeit der Reaktionen des CIF3.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 444 (1978), S. 217-236 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Correlations between Properties of Chalcogenide Glasses. V. Glass Formation and Phase Separation in the Systems Tl—Ge—Se und Pb—Ge—SeThe glass formation in the systems Tl—Ge—Se and PbSe—GeSe2—Se is investigated applying defined melting conditions. In both systems exist - at high Se and low Ge contents - large regions of liquid immiscibility and microphase separation. The compositions of the interconnected phases were determined by chemical analysis, scanning electron microscopy, and by measurements of Vickers hardness. Transformation temperatures Tg and hardness numbers HMV of homogeneous Tl—Ge—Se glasses are in a linear relationship with the approximate values ΔAH1 for the atomization energies of the samples.
    Notes: Für definierte Schmelzbedingungen wird die Glasbildung in den Systemen Tl—Ge—Se und PbSe—GeSe2—Se beschrieben. Bei hohen Selen- und geringen Germaniumgehalten treten in beiden Fällen ausgedehnte Gebiete mit Mikro- und Makrophasentrennung auf. Zur Festlegung des Konnodenverlaufs in den Mischungslücken werden naßchemische Analysen, rasterelektronenmikroskopische Untersuchungen und Mikrohärtemessungen herangezogen. Für die Transformationstemperaturen Tg und die Mikrohärten HMV homogener Tl—GE—Se-Gläser ergeben sich lineare Abhängigkeiten von den Näherungswerten ΔAH1 für die molare Atomisierungsenthalpie der Proben.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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