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  • Composite Materials  (1)
  • Grignard reagents, 1,3-di-  (1)
  • Platinum, complexes of  (1)
  • anther culture medium  (1)
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  • 1
    facet.materialart.
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    Vibro-Acoustic Modulation Based Damage Identification in a Composite Skin-Stiffener Structure (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The vibro-acoustic modulation method is applied to a composite skin-stiffener structure to investigate the possibilities to utilize this method for damage identification in terms of detection, localisation and damage quantification. The research comprises a theoretical part and an experimental part. An impact load is applied to the skin-stiffener structure, resulting in a delamination underneath the stiffener. The structure is interrogated with a low frequency pump excitation and a high frequency carrier excitation. The analysis of the response in a frequency band around the carrier frequency is employed to assess the damage identification capabilities and to gain a better understanding of the modulations occurring and the underlying physical phenomena. Though vibro-acoustic is shown to be a sensitive method for damage identification, the complexity of the damage, combined with a high modal density, complicate the understanding of the relation between the physical phenomena and the modulations occurring. more research is recommended to reveal the physics behind the observations.
    Keywords: Composite Materials
    Type: NF1676L-17972 , European Workshop on Structural Health Monitoring (EWSHM 2014); Jul 08, 2014 - Jul 11, 2014; Nantes; France
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
    Electronic Resource
    Electronic Resource
    Effect of amino acids, growth regulators and genotype on androgenesis in barley (1998)
    Springer
    Plant cell, tissue and organ culture 53 (1998), S. 59-66 
    Details
    ISSN: 1573-5044
    Keywords: anther culture medium ; Gramineae ; heterosis ; Hordeum vulgare ; androgenic ability ; tissue culture competence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of an amino acid mixture and of plant growth regulators added to the FHG barley anther culture medium were examined using three barley cultivars (Cadette, Léger, and Igri) grown in two environments (growth cabinet and glasshouse). ‘Léger’ and ‘Igri’ were known as responsive, and ‘Cadette’ as recalcitrant to androgenesis. Our first experiment showed that the amino acid-supplemented medium was best for embryogenesis and regeneration of ‘Cadette’ and ‘Igri’ in both environments, and if ‘Léger’ in the growth cabinet. The addition of ABA and TDZ did not improve embryogenesis and plant regeneration, and PAA decreased them in the growth cabinet. The addition of the amino acid mixture in the FHG medium also reduced the percentage of albino plants in the growth cabinet, but growth regulators did not improve the percentage of albino plants, and in some cases increased it. In the growth cabinet, disregarding media, ‘Léger’ produced more embryos than ‘Cadette’ and ‘Igri’, and Léger' and ‘Igri’ produced more green plants than ‘Cadette‘. Percentages of albino plants were higher or ‘Cadette’ than for ‘Igri’ or ‘Léger’. In a second experiment, we compared seven hybrids with their parents for androgenic responsiveness. Hybrids had a higher ability to generate green plants than expected based upon the weighted average reflecting the contribution of each parent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006088204764
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Four-Membered 1,8-Naphthalenediyl Transition Metallacycles (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 1851-1856 
    Details
    ISSN: 0009-2940
    Keywords: Grignard reagents, 1,3-di- ; Titanocene ; Zirconocene ; Platinum, complexes of ; Rhodium, complexes of ; Iridium, complexes of ; Metallacycles ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Five 1,8-naphthalenediyl transition metal compounds 2 were prepared by treating either 1,8-naphthalenediylmagnesium (1) or 1,8-dilithionaphthalene with the appropriate transition metal dichloride LnMCl2: LnM = Cp2Ti (2a), (PEt3)2Pt (2b), Cp* PPh3Rh (2c), Cp* PPh3Ir (2d), or Cp*2Zr (2e). The resulting metallacycles were characterized by NMR and mass spectrometry. X-ray crystal structure analyses were performed for (1,8-naphthalenediyl)titanocene (2a) and (1,8-naphthalenediyl)bis(triethylphosphane)platinum (2b). Despite the strain induced by the four-membered metal-containing rings, the naphthalene units show remarkably small distortions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941271006
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    Paper (German National Licenses)
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