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  • Articles: DFG German National Licenses  (4)
  • 1990-1994  (4)
Source
  • Articles: DFG German National Licenses  (4)
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Sintered iron-ceramic composites (1993)
    Springer
    Journal of materials science 28 (1993), S. 729-734 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In order to improve the strength and high-temperature properties of sintered iron, iron-ceramic composites have been studied. In the present investigation, iron powder with 0–8 vol % Al2O3 or SiC particles of different sizes were selected for the study. Powders were mixed, compacted and subsequently sintered at 1150°C under an endo gas atmosphere. Various properties of the sintered compacts, such as density and mechanical properties, were evaluated. Fractography, microstructural studies including EDAX, X-Ray image analysis were studied for selected specimens. It was established from the results that 4 vol % Al2O3 or SiC are optimum to obtain superior properties of the composites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01151249
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular cloning of cDNAs for auxin-induced mRNAs and developmental expression of the auxin-inducible genes (1990)
    Springer
    Plant molecular biology 14 (1990), S. 643-653 
    Details
    ISSN: 1573-5028
    Keywords: auxin action ; cDNA clones ; developmental regulation ; gene expression ; strawberry fruit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract By differential hybridization, two auxin-inducible cDNA clones (λSAR1 and λSAR2) have been isolated from a cDNA library constructed to poly(A)+ mRNA from auxin-treated strawberry receptacles. Both the clones have been used as probes to study the expression of the auxin-induced genes in pollinated and unpollinated fruits of various stages of development and in different organs. A high level of auxin-induced mRNAs is found in pollinated fruits as compared to unpollinated fruits of the same age, suggesting that the expression of the auxin-induced genes is developmentally regulated and the level of auxin-induced mRNAs is regulated by endogenous auxin. Furthermore, our data on the expression of λSAR1 and λSAR2 genes in pollinated and unpollinated fruits revealed a positive correlation between growth of strawberry fruit and the induction of mRNA corresponding to the λSAR1 and λSAR2 clones. Ethylene has no effect on the expression of the auxin-induced mRNAs. λSAR1 mRNA is not detected in other parts of strawberry plants whereas λSAR2 mRNA is present in roots. Furthermore, mRNA corresponding to λSAR1 and λSAR2 is not detected in other auxin-responsive plant systems such as pea epicotyls and bean explants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016498
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Development of nickel aluminide-carbon fibre intermetallic composite by reaction sintering (1991)
    Springer
    Journal of materials science 10 (1991), S. 1222-1224 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00727911
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Evidence for the absence of 4He adsorption on cesium coated graphite surface (1992)
    Springer
    Journal of low temperature physics 87 (1992), S. 113-123 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In agreement with recent theoretical predictions, volumetric vapor pressure isotherm studies indicate a substantial reduction in the adsorption of 4He at temperature near and below 2K when the graphite surface is coated with Cs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00141570
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    Paper (German National Licenses)
    Fulltext
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