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  • Articles: DFG German National Licenses  (5)
  • 1985-1989  (5)
  • Inorganic Chemistry  (4)
  • Isoprenaline  (1)
  • 1
    Electronic Resource
    Electronic Resource
    On the mechanism of β-adrenergic regulation of the Ca channel in the guinea-pig heart (1985)
    Springer
    Pflügers Archiv 405 (1985), S. 285-293 
    Details
    ISSN: 1432-2013
    Keywords: Cardiac myocytes ; Ca current ; Isoprenaline ; Cyclic AMP ; cAMP-Dependent protein kinase ; Protein phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Dose-response relations for the increase in the amplitude of Ca current (I Ca) on external application of isoprenaline (ISP) and internally applied cyclic AMP (cAMP) or catalytic subunit of cAMP-dependent protein kinase (C subunit) were established in single ventricular cells of the guinea pig. An intracellular dialysis technique was used. The threshold concentration was for ISP 10−9 M, for cAMP 3 μM (pipette concentration to which 10−5 M 3-isobutyl-1-methylxanthine was added) and for C subunit around 0.4 μM (pipette concentration). The concentrations for the half-maximal effect were 3.7×10−8 M (ISP), 5.0 μM (cAMP) and 0.95 μM (C subunit) and for the maximum effect 10−6 M (ISP), 15–20 μM (cAMP) and 3–4 μM (C subunit). For all three agents the maximum increase in the Ca current density was similar (a factor of 3–4), suggesting that they converge on the same site of the Ca channel. Accordingly, the effects of cAMP and C subunit onI Ca were non-additive to those of ISP. From these data the relationship both between concentrations of ISP and cAMP and between those of cAMP and active C subunit in terms of their effects onI Ca could be estimated and were compared with those obtained in broken cell preparations. A competitive inhibitor of phosphorylation, 5′-adenylyl-imidodiphosphate (5 mM), greatly reduced the effects of ISP and C subunit onI Ca. Cell dialysis with 3 mM adenosine-5′-(γ-thio)-triphosphate, which produces a dephosphorylationresistant phosphorylation, markedly potentiated the effects of ISP and cAMP onI Ca. The results support the hypothesis that phosphorylation of a protein within, or close to, the Ca channel by cAMP-dependent protein kinase is the mechanism of β-adrenergic stimulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00582573
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Darstellung und Struktur des N,N′ -DithioformylanilinsProfessor Josef Goubeau zum 85. Geburtstage am 31. März 1986 gewidmet (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 534 (1986), S. 7-12 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Structure of N,N′-DithioformylanilineN,N′-dithioformylaniline was prepared by treating N,N′-dichlormethylaniline [1] with silicon disulfide [2]. The compound is characterized by the results of a X-ray structural analysis (RW = 0.030) as well as its nmr and vibration spectra. N,N′-dithioformylaniline crystallizes in the orthorhombic space group P21212 with a = 537.0(2); b = 745.7(3); c = 1111.5(4) pm; V = 445.1(3) · 106 pm3. The molecule consists of two planar parts; the angle between the plane of the aromatic ring and the plane of the N,N′-dithioformylamino group was determined to 87.7°.
    Notes: N,N′-Dithioformylanilin konnte durch Umsetzung von N,N′-Dichlormethylanilin [1] mit Siliciumdisulfid [2] dargestellt werden. Die Verbindung ist durch die Ergebnisse einer Röntgenstrukturanalyse (RW = 0,030) sowie ihre NMR- und Schwingungsspektren charakterisiert. N,N′-Dithioformylanilin kristallisiert orthorhombisch in der Raumgruppe P21212 mit Z = 2 und a = 537,0(2); b = 745,7(3); c = 1111,5(4) pm; V = 445,1(3) · 106 pm3. Das Molekül weist zwei planare Bauteile auf; der Winkel zwischen der Ebene des Aromaten und der durch die N,N′-Dithioformylaminogruppe gelegten Ebene wurde zu 87,7° bestimmt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865340302
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  • 3
    Electronic Resource
    Electronic Resource
    Die Kristall- und MolekülStruktur des N,N′-DiformylanilinsProfessor Josef Goubeau zum 85. Geburtstage am 31. März 1986 gewidmet (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 534 (1986), S. 13-18 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of N,N′-DiformylanilineN,N′-diformylaniline crystallizes in the monoclinic space group P21/n with Z = 8 and a = 856.1(2), b = 1277.6(3), c = 1306.1(3) pm, β 92.29(2)°, V = 1427.4(5) · 106 pm3. As shown by X-ray structure determination (2642 symmetry independent reflections, RW = 0.034) the molecule exists in two enantiomeric forms. The molecular structure can be described by two planes; the angle between the plane of the aromatic ring and the plane of the N,N′-diformylamino group is 70.1 resp. 108.3°. The results are compared with those obtained for other derivats.
    Notes: N,N′-Diformylanilin kristallisiert monoklin in der Raumgruppe P21/n mit Z = 8 und a = 856,1(2); b = 1277,6(3); c = 1306,1(3) pm; β = 92,29(2)°; V = 1427,4(5) · 106 pm3. Nach den Ergebnissen der Röntgenstrukturanalyse (2642 symmetrieunabhängige Reflexe; RW = 0,034) existiert das Molekül in zwei enatiomeren Formen. Die Molekülstruktur kann durch zwei Ebenen beschrieben werden; der Winkel zwischen der Ebene des Aromaten und der durch die N,N′-Diformylaminogruppe gelegten Ebene beträgt 70,1 bzw. 108,3°. Die Ergebnisse werden mit denen anderer Derivate verglichen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865340303
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen an oxidischen Katalysatoren. XLII. Redoxverhalten des Nickels in NiNa—Y-Zeolithen 4. Einfluß der Zusammensetzung auf die Reduzierbarkeit von Nickel in NiNa—Y-Zeolithen (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 521 (1985), S. 145-152 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Oxide Catalysts. XLii. Redox Behaviour of Nickel in Zeolites NiNa—Y. 4. Influence of Composition on the Reducibility of Nickel in Zeolites NiNa—YBy chemical analysis (reaction with K2Cr2O7) and ESCA investigations we determined the degree of reduction in reduced samples NiNa-Y as function of the mole ratio SiO2/Al2O3 (module), of the Ni2+ degree of exchange and the kind of the second cations. (NH4+, Ca2+, Co2+, and Nd3+) in the temperature region of 620-770 K. The degree of nickel reduction increases with increasing module, decreasing degree of exchange and decreasing number of Brönsted acidic centres. This behaviour is caused by the influence of the interaction between cations Ni2+ and zeolite lattice on the reduction equilibrium.
    Notes: Durch chemische Analyse (Reaktion mit K2Cr2O7) un ESCA-Untersuchungen wird in reduzierten NiNa—Y-Proben der Nickel-Reduktionsgrad als Funktion des SiO2/al2O3-Verhältnisses (Modul), des Nickelaustauschgrades und der Art eines Zweitkations (NH4+ +, Ca2+, Co2+, Nd3+) im Temperaturbereich von 620 - 770 K bestimmt. Der Nickel-Reduktionsgrad steigt mit wachsendem Modul, sinkendem Austauschgrad und sinkender Zahl Brönsted-acider Zentren. Die Ursache dafür wird in dem Einfluß der Ni2+-Zeolithgitter-Wechselwirkung auf das Reduktionsgleichgewicht gesehen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855210217
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  • 5
    Electronic Resource
    Electronic Resource
    Über Cyanatverbindungen und deren reaktives Verhalten. XLIII. Darstellung und Eigenschaften von Organomagnesiumthiocyanat- und -selenocyanat-Verbindungen (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 577 (1989), S. 53-58 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyanates and their Reactive Behaviour. XLIII. Synthesis and Properties of Organomagnesium Thiocyanate and Selenocyanate CompoundsRMgX and RMgX · 2 L compounds react with KYCN in tetrahydrofurane via halide pseudohalide exchange reactions to give RMgNCY solutions (R = alkyl or aryl groups; X = Cl, Br, I; L = O-donors; Y = S, Se), from which compounds of the type RMgNCY · 2 THF have been isolated in a crystalline form. The prepared compounds are characterized by analytical data, IR absorption spectra, concentration dependent conductivity measurements and reactive behaviour in relation to classic Grignard reagents.
    Notes: Reaktionen von RMgX- bzw. RMgX · 2L-Verbindungen führen in Tetrahydrofuran mit KYCN über Halogenid-Pseudohalogenid-Austauschreaktionen zu RMgNCY-Reaktionslösungen (R = Alkyl- oder Arylgruppen; X = Cl, Br, I; L = O-Donoren; Y = S, Se), aus denen kristalline Verbindungen des Typs RMgNCY · 2 THF isolierbar sind. Die dargestellten Verbindungen werden durch IR-Absorptionsspektren, konzentrationsabhängige Elektrolytleitfähigkeitsmessungen und ihr Reaktionsverhalten im Vergleich zu „klassischen Grignardverbindungen“ näher charakterisiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895770106
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