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  • 2000-2004  (4)
  • XPS  (2)
  • Muscle Calcium Troponin C  (1)
  • beams  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Investigating the role of Ca2+-binding site IV in barnacle troponin C (2000)
    Springer
    Pflügers Archiv 439 (2000), S. 600-609 
    Details
    ISSN: 1432-2013
    Keywords: Muscle Calcium Troponin C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Two genetically engineered, recombinant versions of native barnacle troponin C (TnC) (BTnC2) were created from the bacterially expressed, recombinant, wild-type BTnC (BTnCWT) to investigate the role of the Ca2+-specific sites in force regulation. The mutant BTnC4– contains a single amino acid mutation in site IV which results in the inactivation of site IV Ca2+ binding; the mutant BTnCTrunc lacks the last 11 amino acids of the C-terminal, and hence most of site IV. Both mutant proteins, which retain an active site II, bind to native TnC-depleted myofibrillar bundles and restore approximately 40% of the tension-generating capacity, about half that seen with purified native BTnC1 or BTnC2. This observation implies that the Mg2+-dependent interaction with troponin I (TnI) is at a location on TnC other than the C-terminal Ca2+-binding sites of BTnC2. Replacement with BTnCTrunc increases the sensitivity of the myofibrillar bundle to changes in ionic strength. Decreasing the ionic strength from 0.15 to 0.075 M increased force by 34%, a value much greater that the 8% increase seen in control bundles or bundles substituted with BTnC4–. These findings implicate TnC in determining this fibre characteristic, although this cannot be simply due to the alteration in the numbers of Ca2+ ions bound by the troponin complex since both BTnC4– and BTnCTrunc bind only 1 mol Ca2+/mol protein
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004249900216
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Substitution Effect of Sn for Cu in the Bi2Sr2CaCu2−xSnxO8+δ System (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 137-139 
    Details
    ISSN: 1572-9605
    Keywords: Bi-based superconductor ; doping ; XPS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The Bi2Sr2CaCu2O8+δ system samples doped with Sn on Cu sites were synthesized. Resistivity temperature dependence, X-ray powder diffraction and photoemission experiments have been performed. Suppression of superconductivity in the Sn-doped Bi2Sr2CaCu2O8+δ system has been observed. X-ray photoemission measurements show that Sn ion enters the lattice. Our results reveal that Sn ions are mostly in bivalent states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007794613891
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Substitution Effect of Pr for Ca in Bi2Sr2CaCu2O8+δ System (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 603-606 
    Details
    ISSN: 1572-9605
    Keywords: Bi-based superconductivity ; doping ; XRD ; XPS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The Bi2Sr2CaCu2O8+δ system samples doped with Pr on Ca sites were synthesized. Resistivity temperature dependence, X-ray powder diffraction, and photoemission experiments have been performed. Both X-ray diffraction and photoemission measurements show that Pr ion enters the lattice with a valence higher than 3+, which supports the hole-filling mechanism of the suppression of superconductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007881002778
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  • 4
    Electronic Resource
    Electronic Resource
    On dimensionless numbers for dynamic plastic response of structural members (2000)
    Springer
    Archive of applied mechanics 70 (2000), S. 245-254 
    Details
    ISSN: 1432-0681
    Keywords: Key words Dynamic plastic response ; dimensional analysis ; beams ; circular plates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary A dimensional analysis is reported for the dynamic plastic response and failure of structural members, which includes material strain hardening, strain rate and temperature effects. Critical shear failure conditions are also discussed based on the dimensional analysis results. It is shown that the response number R n proposed in [3], is an important independent dimensionless number for the dynamic plastic bending and membrane response of structural members. However, additional dimensionless numbers are necessary when transverse shear, strain hardening, strain rate, and temperature effects are important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004199900072
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    Paper (German National Licenses)
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