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  • 41A05  (1)
  • Ectothiorhodospira shaposhnikovii  (1)
  • Springer  (2)
  • PANGAEA
  • 2005-2009
  • 1980-1984  (2)
Collection
Keywords
Publisher
  • Springer  (2)
  • PANGAEA
Years
  • 2005-2009
  • 1980-1984  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Computing 31 (1983), S. 269-286 
    ISSN: 1436-5057
    Keywords: 65D05 ; 6504 ; 41A05 ; Rational interpolation ; reliable algorithms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Es wird ein Programm vorgelegt, das zu gegebenem ZählergradL, NennergradM (fürL≥M) und Daten (x j,f j),j=1,...,L+M eine rationale Interpolierende in Form eines (verallgemeinerten) Kettenbruchs liefert oder mitteilt, daß die Daten mit den vorgegebenen Graden nicht interpoliert werden können, sondern daß unerreichbare Punkte auftreten. Dazu wird der Algorithmus des Verfassers (beschrieben in [2]) mit der von Graves-Morris [1] angegebenen Umordnung der Daten zur numerischen Stabilisierung verwendet. Diese Umordnung kann auch unterdrückt werden. Die Wirkungsweise des Programms wird an einigen Beispielen erläutert.
    Notes: Abstract This note contains a program for rational interpolation with degree of numerator equal toL and of denominator equal toM (forL≥M). The program will either produce the rational interpolation of the data (x j,f j),j=0,...,L+M by a (generalized) continued fraction or state that the interpolation is not feasible because there are unattainable points. We use the algorithm given in [2] and incorporate the reordering of data for numerical stabilisation due to Graves-Morris [1]. The reordering may be suppressed. The performance of the program is illustrated by several examples.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 137 (1984), S. 266-271 
    ISSN: 1432-072X
    Keywords: Ectothiorhodospira shaposhnikovii ; Bacterial ferredoxin ; High potential iron sulfur protein (HIPIP)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In addition to several cytochromes three iron sulfur proteins were detected in mixotrophically grown cells of Ectothiorhodospira shaposhnikovii, a member of the Chromatiaceae. They were identified as a bacterial ferredoxin and two high potential iron sulfur proteins (HIPIPs). The two HIPIPs were purified and characterized. They were named according to their differing retention times on a DEAE-cellulose column using a continuous NaCl gradient: “early” and “late” HIPIP. The HIPIPs contain 4 mol of non-heme iron and 4 mol of acid labile sulfur per mol protein. Under the conditions of purification the “early” HIPIP (E m, 7+270 mV) was present in a semi-reduced state. Using ion-exchange chromatography the “early” HIPIP could be split into a reduced green-brown (pI=3.7) and an oxidized red-brown (pI=3.9) fraction. The “late” HIPIP (pI=3.8) showed a midpoint potential of only+155 mV, the lowest redox potential of a HIPIP described so far.
    Type of Medium: Electronic Resource
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