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  • CHEMISTRY AND MATERIALS (GENERAL)  (3)
  • BARE-1 retrotransposon Barley Net blotch resistance Linkage mapping Quantitative trait locus (QTL)  (1)
  • 2000-2004  (1)
  • 1990-1994  (3)
  • 1965-1969
Collection
Keywords
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  • 2000-2004  (1)
  • 1990-1994  (3)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    Application of BARE-1 retrotransposon markers to the mapping of a major resistance gene for net blotch in barley (2000)
    Springer
    Molecular genetics and genomics 264 (2000), S. 325-334 
    Details
    ISSN: 1617-4623
    Keywords: BARE-1 retrotransposon Barley Net blotch resistance Linkage mapping Quantitative trait locus (QTL)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Net blotch, which is caused by the fungus Pyrenophora teres Drechs. f. teres Smedeg., presents a serious problem for barley production worldwide, and the identification and deployment of sources of resistance to it are key objectives for many breeders. Here, we report the identification of a major resistance gene, accounting for 65% of the response variation, in a cross between the resistant line CI9819 and the susceptible cv. Rolfi. The resistance gene was mapped to chromosome 6H with the aid of two recently developed systems of retrotransposon-based molecular markers, REMAP and IRAP. A total of 239 BARE-1 and Sukkula retrotransposon markers were mapped in the cross, and the 30-cM segment containing the locus with significant resistance effect contained 26 of the markers. The type and local density of the markers should facilitate future map-based cloning of the resistance gene as well as manipulation of the resistance through backcross breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380000326
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    Chemical vapor deposition coatings for oxidation protection of titanium alloys (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Results of an experimental investigation of the oxidation protection afforded to Ti-14Al-21Nb and Ti-14Al-23Nb-2V titanium aluminides and Ti-17Mo-3Al-3Nb titanium alloy by aluminum-boron-silicon and boron-silicon coatings are presented. These coatings are applied by a combination of physical vapor deposition (PVD) and chemical vapor deposition (CVD) processes. The former is for the application of aluminum, and the latter is for codeposition of boron and silicon. Coating thickness is in the range of 2 to 7 microns, and coating weights are 0.6 to 2.0 mg/sq cm. Oxidation testing was performed in air at temperatures to 1255 K in both static and hypersonic flow environments. The degree of oxidation protection provided by the coatings is determined from weight change measurements made during the testing and post test compositional analyses. Temperature-dependent total normal emittance data are also presented for four coating/substrate combinations. Both types of coatings provided excellent oxidation protection for the exposure conditions of this investigation. Total normal emittances were greater than 0.80 in all cases.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: In: Damage and oxidation protection in high temperature composites. Vol. 1; Proceedings of the Symposium, 112th ASME Winter Annual Meeting, Atlanta, GA, Dec. 1-6, 1991 (A93-53937 23-24); p. 1-8.
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    The effectiveness of multi-layer insulation as meteoroid and orbital debris shielding (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: This paper presents the results of a study of the penetration resistance of Type I Multi-Layer Insulation (MLI) to meteoroid and orbital debris particles. Hypervelocity impact tests on MLI were performed and the collected data was compared to data and empirical equations developed for aluminum. The study results indicate that MLI can be an effective shield from meteoroids and orbital debris for short duration missions and for non-critical elements. However, long missions which require high levels of protection cannot rely on MLI without a thorough investigation of the overall system reliability.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: AIAA PAPER 92-1460
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Non-catalytic coatings for hypersonic vehicle applications (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: CVD coatings of boron-oxygen-silicon and aluminum-boron-oxygen and silicon compositions were applied to alpha 2 and gamma titanium-aluminide alloys, and tested under simulated earth reentry conditions to evaluate oxidation protection, recombination effifiency and total emittance under cyclic exposures between temperatures of 300 and 1255 K. The degree of oxidation protection afforded to the alloys was evaluated from the amount of specimen weight gain after a 100 hour exposure to air at atmospheric pressure and at a temperature of 1255 K. Data are presented for two types of coatings, a monolithic and a multilayer, which have recombination efficiencies from 0.005 to 0.020 after ten one-half hour long simulated reentry cycles. Total normal emittance was 0.80 or greater and weight gain was less than 10 g/sq m both coating types. Compositional and morphological changes resulting from the exposures are discussed in relation to time-dependent variations in recombination efficiency.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: AIAA PAPER 90-1742
    Format: text
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    NASA TECHNICAL REPORTS
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