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  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (2)
  • Competence  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Acquisition of competence for floral development in Nicotiana buds (1992)
    Springer
    Planta 188 (1992), S. 546-550 
    Details
    ISSN: 1432-2048
    Keywords: Competence ; Flowering ; Floral determination ; Nicotiana (flowering)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Grafting experiments were used to investigate the relative roles of strength of flowering signal(s) and competence of buds to respond to flowering signal(s) in the development of photoperiodic and day-neutral species of Nicotiana. At the time of commitment to floral development, a flowering signal (inhibitory or promotive) could reach a critical level or terminal buds could gain competence to perceive and-or respond to an existing signal. The latter hypothesis appears to be true for day-neutral N. tabacum L. cv. Wisconsin 38, while signal strength appears to be a more critical factor for long-day N. silvestris L. Nicotiana tabacum and N. silvestris differ in terms of signal intensity at anthesis of the terminal flower. Stocks of N. silvestris promote more rapid flowering in seedling scions of both genotypes. Terminal buds of seedlings of both genotypes have the same competence to respond to the signal affecting floral development. The competence of the terminal bud of both species to respond to this signal(s) changes as a function of age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00197047
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Chemical and microbiological experimentation for development of environmental control and life support systems (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Microbiological techniques are under study with a view to the identification of viable microorganisms in liquid cultures, improve the identification of stressed organisms, and determine the biocidal activity of iodine and other chemicals on isolates from recycled water. A quality-assurance program has been implemented to validate data employed in making decisions concerning engineering and human health and safety. Analytical laboratory refinements will strongly aid the development of environmental control and life-support systems.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: AIAA PAPER 92-1606
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The characterization of organic contaminants during the development of the Space Station water reclamation and management system (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Examples of the application of various methods for characterizing samples for alcohols, fatty acids, detergents, and volatile/semivolatile basic, neutral, and phenolic acid contaminants are presented. Data, applications, and interpretations are given for a variety of methods including sample preparation/cleanup procedures, ion chromatography, and gas chromatography with various detectors. Summaries of the major organic contaminants that contribute to the total organic carbon content are presented.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 911376 , International Conference on Environmental Systems; Jul 15, 1991 - Jul 18, 1991; San Francisco, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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