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  • alumina scales  (1)
  • isonicotinyl hydrazide  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Stresses in alumina scales on NiCrAlY-alloys determined by XSE and LRS (1997)
    Springer
    Microchimica acta 125 (1997), S. 275-278 
    Details
    ISSN: 1436-5073
    Keywords: alumina scales ; spallation ; stress measurement ; X-ray diffraction ; Raman spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The effect of silicon and titanium on the spallation resistance of alumina scales grown on NiCrAlY-type alloys has been investigated. For this purpose cyclic oxidation experiments on model alloys with different additions of silicon or titanium were carried out at temperatures between 950 and 1100 °C. Selected samples were analysed by X-ray stress evaluation (XSE) after various times of oxidation. It was found that the compressive stresses measured at ambient temperature increase with increasing time and are affected by the presence of silicon. The XSE results were used to calibrate laser Raman spectroscopy (LRS) for strain measurement. Then, the suitability of Raman spectroscopy for stress measurement at higher temperatures was evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246196
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    15N and inhibitor studies on the photorespiratory nitrogen cycle in maize leaves (1983)
    Springer
    Photosynthesis research 4 (1983), S. 3-7 
    Details
    ISSN: 1573-5079
    Keywords: Ammonia fixation ; azaserine ; isonicotinyl hydrazide ; methionine sulfoximine ; photorespiration ; Zea mays L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A combination of inhibitor and 15N studies were used to investigate the photorespiratory nitrogen cycle in maize, a C4 plant. Inhibitors used included isonicotinyl hydrazide which blocks the conversion of glycine to serine, methionine sulfoximine an inhibitor of GS and azaserine an inhibitor of GOGAT. Results from levels of ammonia and amino acids and the distribution of 15N into NH3, serine, glutamine and glutamate indicated that the photorespiratory N-cycle occurs in this C4 plant, but the rate of flux through this pathway is low as compared with that in C3 plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041796
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    Paper (German National Licenses)
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