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  • 2005-2009
  • 1995-1999  (3)
  • 1965-1969
  • 74.25.Fy  (1)
  • 74.25Fy  (1)
  • 74.62Fj  (1)
  • Albizia  (1)
  • 1
    ISSN: 1572-9818
    Keywords: Albizia ; Griffonia ; phenolics ; RNA extraction ; recalcitrant tissues ; Vitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Difficulties extracting high-quality RNA from recalcitrant plant tissues are often due to high levels of phenolics, carbohydrates, or other compounds that bind and/or co-precipitate with RNA. We describe here a method using soluble polyvinylpyrrolidone (PVP) and ethanol precipitation, which has been successful in several recalcitrant systems where other specialized RNA extraction methods failed to deliver suitable product. Using this method, RNA capable of reverse-transcription/PCR amplification and cDNA library construction was isolated from ripening grape berries, dry seeds of Albizia procera and radish, and leaf tissue of A. procera and Griffonia simplicifolia. This method is applicable to a variety of plant tissues.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of low temperature physics 105 (1996), S. 915-920 
    ISSN: 1573-7357
    Keywords: 74.25Fy ; 74.62Fj ; 74.72Dn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Out-of-plane resistivity pc(T) of optimally-doped high-Tc superconductor La2−xSrxCuO4 has been investigated under hydrostatic pressure up to 8GPa. We found a drastic decrease in ϱc which reaches 50% at 8GPa. The large change of ϱc is understood as due to a small variation of the lattice parameter c. In comparison with a change of pc(T) estimated from a change of c due to thermal contraction, we conclude that the well known temperature-linear dependence of ϱc is apparent metallic one; essentially ϱc is nonmetallic over the whole temperature range, and can be described in terms of tunneling or quantum hopping conduction between CuO2 layers. Such tunneling conduction is enhanced by the scattering in the CuO2 plane at the oxygen defects which affect the in-plane resistivity only very weakly.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of low temperature physics 105 (1996), S. 1593-1598 
    ISSN: 1573-7357
    Keywords: 72.15.Lh ; 74.25.Fy ; 74.70.−b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have investigated the normal-state conduction of superconducting Sr2RuO4 (Tc ∼ 1K), which is isostructural to La2−xSrxCuO4. The resistivity of single crystals shows a crossover at TM∼130K from 3D metallic conduction at lower temperatures to 2D one at higher temperatures. Concerning the temperature dependence of the out-of-plane resistivity, we present a systematic interpretation based on competition between the life time of the quasiparticles and the time for the quasiparticles to travel between the adjacent RuO2 planes.
    Type of Medium: Electronic Resource
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