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  • 1975-1979  (5)
  • 1950-1954
  • 1976  (5)
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  • 1975-1979  (5)
  • 1950-1954
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  • 1
    Electronic Resource
    Electronic Resource
    Über Verfahren zur zweiseitigen Approximation inverser Elemente (1976)
    Springer
    Computing 17 (1976), S. 59-67 
    Details
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Abstract In a partially ordered ring, a set of iterative methods is constructed in order to approximate the inverse of a given element, not necessarily positive or inverse-positive. Two sequences are generated both converging to the inverse. In addition the inverse is monotonously enclosed. The method of order four has the maximal efficiency index.
    Notes: Zusammenfassung Anknüpfend an Arbeiten von G. Alefeld und J. Herzberger und von J. W. Schmidt werden in einem halbgeordneten RingR Iterationsverfahren untersucht, welche geeignet sind, die Inverse eines nicht notwendig positiven oder inverspositiven Elementesa∈R zu approximieren. Es werden jeweils zwei Folgen (X n ) und (y n ) konstruiert, welche beide gegen die Inversea −1 konvergieren und diese zusätzlich im Sinne vonX n−1 ≦X n ≦a −1 ≦y n ≦y n−1 monoton einschließen. Von den betrachteten Verfahren hat das vierter Ordnung den größten Effektivitätsindex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02252260
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Monotone Einschließung von Inversen positiver Elemente durch Verfahren vom Schulz-Typ (1976)
    Springer
    Computing 16 (1976), S. 211-219 
    Details
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Abstract The conditional iterationx n+1 =sup (x n ,x n +x n (e−ax n )),y n−1 =inf (y n ,x n +y n (e−ax n )) generating sequences (x n ) and (y n ) is considered in partially ordered spaces. Under certain conditions it is shown, that the inversea −1 of a positive elementa≧0 is monotonously enclosed in the sensex n ≦x n+1 ≦a −1 ≦y n+1 ≦y n and that (x n ) and (y n ) converge toa −1 quadratically.
    Notes: Zusammenfassung Es wird gezeigt, daß die bedingte Iterationx n+1 =sup (x n ,x n +x n (e−ax n )),y n+1 =inf (y n ,x n +y n (e−ax n )) unter bestimmten Voraussetzungen die Inversea −1 eines positiven Elementsa≧0 gemäßx n ≦x n+1 ≦a −1 ≦y n+1 ≦y n monoton einschließt und daß die Folgen (x n ) und (y n ) quadratisch gegena −1 konvergieren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02280880
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A Cu(I) ion conductor obtained by replacement of Ag(I) in α-AgI (1976)
    Springer
    Journal of applied electrochemistry 6 (1976), S. 411-415 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A solid conductor for Cu(I) was obtained by introducing Cu(I) into the high temperature form of AgI. The cationic transport number is practically one with negligible electronic conduction. The formula of the compound may be expressed by Ag(1−x)Cu x I withx varying with the temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616540
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Proline endopeptidase and exopeptidase activity in polymorphonuclear granulocytes (1976)
    Springer
    Molecular and cellular biochemistry 10 (1976), S. 77-80 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary Peptidases capable of releasing proline residues from polypeptides are present in the cytoplasmic fraction of rabbit polymorphonuclear granulocytes. This was shown with peptide substrates where proline is present either at the carboxy-terminal or within the polypeptide chain. Lysosomal and plasma membrane enzymes were inactive towards such polypeptides. The proline residue was hydrolyzed at either its amino end or its carboxy end. It is noteworthy that a Pro:Pro bond was cleaved both in the pentapeptide Thr-Lys-Pro-Pro-Arg and the dipeptide Pro:Pro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01742201
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Cyanonitrosylferrate und Cyanocarbonylnitrosylferrate niedriger OxydationsstufenProfessor Walter Hieber zum 80. Geburtstage am 18. Dezember 1975 gewidmet (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 421 (1976), S. 15-23 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyanonitrosylferrates and Cyanocarbonylnitrosylferrates of Low Oxidation StatesBy the reduction of sodium nitroprusside with alkali metals in liquid ammonia the cyanonitrosylferrates [Fe[CN]5, NO]3-, [Fe(CN)4, NO]2-, [Fe(CN)4N0]3- and [Fe(CN)3N0]4- are formed. Preparation and properties of these reduction products (Table 1) and of the cyanocarbonylnitrosylferrates still missing within the series [Fe(CN)n(CO)3-nNO](n+l)- (n = 1 and 2) are described. Structure and bonding of these complexes are discussed with respect to their magnetic properties and their i.r. spectra.
    Notes: Bei der Reduktion von Nitroprussidnatrium durch Alkalimetalle in fl. Ammoniak werden die Cyanonitrosylferrat-Ionen [Fe(CN)5NO]3-, [Fe(CN)4NO]2-, [Fe(CN)4NO]3- und [Fe(CN)3NO]4- gebildet. Darstellung und Eigenschaften dieser Reduktionsprodukte (Tab. 1) sowie der noch fehlenden Cyanocarbonylnitrosylferrate der Reihe [Fe(CN)n(CO)3-nNO](n+1)- (n = 1 und 2) werden beschrieben. Struktur und Bindungen dieser Komplexe werden anhand ihrer magnetischen Eigenschaften und ihrer IR-Spektren diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764210104
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    Paper (German National Licenses)
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