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  • Articles: DFG German National Licenses  (3)
  • 1995-1999  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Conservation in wheat high-molecular-weight glutenin gene promoter sequences: comparisons among loci and among alleles of the GLU-B1-1 locus (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 568-576 
    Details
    ISSN: 1432-2242
    Keywords: Key words Wheat ; High-molecular-weight glutenin ; Promoter ; Transposon ; Genome evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The high-molecular-weight glutenin (HMW) genes and encoded subunits are known to be critical for wheat quality characteristics and are among the best-studied cereal research subjects. Two lines of experiments were undertaken to further understand the structure and high expression levels of the HMW-glutenin gene promoters. Cross hybridizations of clones of the paralogous x-type and y-type HMW-glutenin genes to a complete set of six genes from a single cultivar showed that each type hybridizes best within that type. The extent of hybridization was relatively restricted to the coding and immediate flanking DNA sequences. Additional DNA sequences were determined for four published members of the HMW-glutenin gene family (encoding subunits Ax2*, Bx7, Dx5, and Dy10) and showed that the flanking DNA of the examined genes diverge at approximately −1200 bp 5′ to the start codon and 200–400 bp 3′ to the stop codon. These divergence sites may indicate the boundaries of sequences important in gene expression. In addition, promoter sequences were determined for alleles of the Bx gene (Glu-B1-1), a gene reported to show higher levels of expression than other HMW-glutenin genes and with variation among cultivars. The sequences of Bx promoters from three cultivars and one wild tetraploid wheat indicated that all Bx alleles had few differences and contained a duplicated portion of the promoter sequence “cereal-box” previously suspected as a factor in higher levels of expression. Thus, the “cereal-box” duplication preceeded the origin of hexaploid wheat, and provides no evidence to explain the variations in Bx subunit synthesis levels. One active Bx allele contained a 185-bp insertion that evidently resulted from a transposition event.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050775
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Optical measurements of thermal diffusivity of a material (1995)
    Springer
    International journal of thermophysics 16 (1995), S. 973-995 
    Details
    ISSN: 1572-9567
    Keywords: heat transfer ; optical diagnostics ; photothermal methods ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The measurement of thermal diffusivity of a material (in particular, a thin film) is important for various reasons, e.g., to predict the heat transfer in the solid subjected to a thermal process, to monitor surface composition or morphology, or to detect invisible subsurface defects like delaminations. This measurement can be done in a noncontact manner using various photothermal methods. Such methods typically involve pulsed heating of the surface by small amounts using a laser source; the decay of the surface temperature after this pulsed photothermal heating is then probed to provide the thermal diffusivity. Various probing methods have been developed in the literature, including the probing of reflection, refraction, and diffraction from the pulsed heated area, infrared thermal radiometry, and surface deformation. This paper provides an overview of such techniques and some examples of their applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02093477
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A DIRECTIONALLY ADAPTIVE METHODOLOGY USING AN EDGE-BASED ERROR ESTIMATE ON QUADRILATERAL GRIDS (1996)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 23 (1996), S. 673-690 
    Details
    ISSN: 0271-2091
    Keywords: Euler equations ; directionally adaptive meshes ; edge-based error estimate ; structured grids ; mesh movement ; finite element method ; high-speed flows ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The present paper describes a directionally adaptive finite element method for high-speed flows, using an edge-based error estimate on quadrilateral grids. The error of the numerical solution is estimated through its second derivatives and the resulting Hessian tensor is used to define a Riemannian metric. An improved mesh movement strategy, based on a spring analogy, but with no orthogonality constraints, is introduced to equidistribute the lengths of the edges of the elements in the defined metric. The grid adaptation procedure is validated on an analytical test case and the efficiency of the overall methodology is investigated on supersonic and hypersonic benchmarks.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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