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  • METALLIC MATERIALS  (3)
  • Genetics  (2)
  • 1980-1984  (5)
  • 1984  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Bromodeoxyuridine inhibits the rDNA compensatory response of Drosophila melanogaster (1984)
    Chichester [u.a.] : Wiley-Blackwell
    Developmental Genetics 5 (1984), S. 201-207 
    Details
    ISSN: 0192-253X
    Keywords: rDNA ; compensation ; rRNA-DNA hybrids ; restriction analysis ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The compensatory response is a regulatory event influencing the redundancy of the ribosomal RNA cistrons (rDNAs) of Drosophila melanogaster. In this report we attempt to demonstrate that the compensatory event and the thymidine analogue bromodeoxyuridine (BrdU) specifically interact. We conclude that the drug inhibits the compensatory response of Drosophila melanogaster XO males and argue that the compensatory event is not the passive consequence of replicational dominance known to occur in Drosophila polytene tissues.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/dvg.1020050403
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The interaction of bromodeoxyuridine with ribosomal RNA cistron redundancy in Drosophila (1984)
    Chichester [u.a.] : Wiley-Blackwell
    Developmental Genetics 5 (1984), S. 65-71 
    Details
    ISSN: 0192-253X
    Keywords: BrdU ; rDNA ; Drosophila ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We demonstrate that Bromodeoxyuridine (BrdU)-induced reductions of the ribosomal RNA cistrons (rDNAs) are observed in Drosophila virilis, and Drosophila busckii, but not in karyotypically normal adults or larvae of Drosophila melanogaster. However, BrdU does reduce the redundancy of the rDNAs of XO D melanogaster males, in which a compensatory response is evidenced in the untreated XO sibling controls. These results suggest that the BrdU-rDNA interaction is specific to events which modulate rDNA redundancy. Further, both thymidine and deoxycytidine “reverse” the BrdU effect in D virilis, an observation which is inconsistent with current working hypotheses describing the mechanisms of BrdUs effects.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/dvg.1020050202
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    Paper (German National Licenses)
    Fulltext
  • 3
    facet.materialart.
    Unknown
    Surface protection (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The surface protection subproject consists of three major thrusts: airfoil deposition model; metallic coating life prediction; and thermal barrier coating (TBC) life prediction. The time frame for each of these thrusts and the expected outputs are presented. Further details are given for each thrust such as specific element schedules and the status of performance; in-house, via grant, or via contract.
    Keywords: METALLIC MATERIALS
    Type: Turbine Engine Hot Section Technology, 1984; 10 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Overlay metallic-cermet alloy coating systems (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use is coated with a base coating of an oxide dispersed, metallic alloy (cermet). A top coating of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then deposited on the base coating. A heat treatment is used to improve the bonding. The base coating serves as an inhibitor to interdiffusion between the protective top coating and the substrate. Otherwise, the protective top coating would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.
    Keywords: METALLIC MATERIALS
    Type: NAS 1.71:LEW-13639-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Coating with overlay metallic-cermet alloy systems (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A base layer of an oxide dispersed, metallic alloy (cermet) is arc plasma sprayed onto a substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use. A top layer of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then arc plasma sprayed onto the base layer. A heat treatment is used to improve the bonding. The base layer serves as an inhibitor to interdiffusion between the protective top layer and the substrate. Otherwise, the 10 protective top layer would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.
    Keywords: METALLIC MATERIALS
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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