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  • ASTRODYNAMICS  (1)
  • FISH
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  • 1
    Electronic Resource
    Electronic Resource
    18S-28S rDNA is interspersed throughout heterochromatin in the millepede Enologus oxypygum (Diplopoda) (2000)
    Springer
    Genetica 110 (2000), S. 151-155 
    Details
    ISSN: 1573-6857
    Keywords: chromosomes ; diplopoda ; Enologus oxypygum ; FISH ; heterochromatin ; invertebrate ; rDNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the present study, somatic metaphase chromosomes of the millipede Enologus oxypygum (Diplopoda: Julida) were hybridized in situ with a sea urchin (Echinodermata) ribosomal probe (prRl4) in order to map major RNA genes (rDNA). Chromosomal preparations were also silver stained (Ag-NOR) to evaluate the rDNA transcriptional activity. Our results indicate that RNA genes are throughout heterochromatin in eight chromosomes involving 1/4 of the total heterochromatin which, in this species, is about 67% of the total DNA. Ag-NOR and FISH patterns were not coincident.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017928826304
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    Paper (German National Licenses)
    Fulltext
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    Atmosphere explorer /AE-C/ adaptive mission design and trajectory performance (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The preflight mission design and in-flight execution are presented to illustrate the actual utilization of the adaptive nature of this mission. Spacecraft systems (propulsion, attitude, accelerometer) and software (maneuver program) features which contribute to the adaptive trajectory flexibility are discussed. Descriptions of procedures used to handle low perigee maneuver operations (to 130 km), for achieving ground track control and orbit phasing, for making a transition from elliptical to circular orbits, and for circular orbit restoration and maintenance are presented in detail. The 85 maneuvers made during the first 17 months of the mission are summarized.
    Keywords: ASTRODYNAMICS
    Type: AAS PAPER 75-052 , Astrodynamics Specialist Conference; Jul 28, 1975 - Jul 30, 1975; Nassau; Bahamas
    Format: text
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    NASA TECHNICAL REPORTS
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