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  • Artikel  (2)
  • Weitere Quellen  (9)
  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (8)
  • Atomic and molecular structure and dynamics  (1)
  • COMMUNICATIONS AND RADAR  (1)
  • Letters  (1)
  • 1
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    Oil spill dispersants [Biological Sciences] (2016)
    National Academy of Sciences
    Details
    Publikationsdatum: 2016-03-16
    Beschreibung: Kleindienst et al. (1) question whether dispersants stimulated biodegradation following the Macondo oil release in the Gulf of Mexico, but, in fact, their experimental design illustrates why dispersants play such an essential role in oil spill response. Their method of producing “water accommodated fractions,” although routinely used for toxicity tests,...
    Schlagwort(e): Letters
    Print ISSN: 0027-8424
    Digitale ISSN: 1091-6490
    Thema: Biologie , Medizin , Allgemeine Naturwissenschaft
    Publiziert von National Academy of Sciences
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 2
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    Fano resonances observed in helium nanodroplets (2016)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2016-05-11
    Beschreibung: Author(s): A. C. LaForge, D. Regina, G. Jabbari, K. Gokhberg, N. V. Kryzhevoi, S. R. Krishnan, M. Hess, P. O'Keeffe, A. Ciavardini, K. C. Prince, R. Richter, F. Stienkemeier, L. S. Cederbaum, T. Pfeifer, R. Moshammer, and M. Mudrich Doubly excited Rydberg states of helium (He) have been studied in nanodroplets using synchrotron radiation. Although qualitatively similar to their atomic counterparts, the Fano resonances in droplets are broader and exhibit blueshifts which increase for the higher excited states. However, varying t… [Phys. Rev. A 93, 050502(R)] Published Tue May 10, 2016
    Schlagwort(e): Atomic and molecular structure and dynamics
    Print ISSN: 1050-2947
    Digitale ISSN: 1094-1622
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 3
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    CELSS Breadboard Project at the Kennedy Space Center (1989)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-19
    Beschreibung: The CELSS Breadboard Project is described, noting that it was initiated to study aspects of a CELSS for long-term space missions. Topics for extensive investigation included air and water regeneration, engineering control, and food production. The many options available for growing food crops in commercial plant growth chambers were investigated and the best of this information was translated to the Biomass Production Chamber (BPC). The chamber contains 20 sq m of crop growing area under 96 400 W HPS lamps; sixteen 0.25 sq m plant growth trays used on each of four growing shelves for a total of 64 trays; and one 256-L nutrient solution reservoir with the appropriate continuous-flow, thin-film plumbing for each shelf. A heating, ventilating, and air-conditioning system maintains atmospheric conditions and serves to distribute oxygen and carbon dioxide and maintain pressure at 12 mm of water. The control and monitoring subsystem, which uses a programmable logic controller, manages the BPC subsystems.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 4
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    A review of recent activities in the NASA CELSS program (1987)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-19
    Beschreibung: A CELSS (Controlled Ecological Life Support System) is a device that utilizes photosynthetic organisms and light energy to regenerate waste materials into oxygen and food for a crew in space. The results of theoretical and practical studies conducted by investigators within the CELSS program suggest that a bioregenerative life support system can be a useful and effective method of regenerating consumable materials for crew sustenance. Experimental data suggests that the operation of a CELSS in space will be practical if plants can be made to behave predictably in the space environment. Much of the work currently conducted within the CELSS program centers on the biological components of the CELSS system. The work is particularly directed at ways of achieving high efficiency and long term stability of all components of the system. Included are explorations of the conversion of nonedible cellulose to edible materials, nitrogen fixation by biological and chemical methods, and methods of waste processing. It is the intent of the presentation to provide a description of the extent to which a bioregenerative life support system can meet the constraints of the space environment, and to assess the degree to which system efficiency and stability can be increased during the next decade.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: Advances in Space Research (ISSN 0273-1177); 7; 4, 19
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 5
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    Engineering verification of the biomass production chamber (1992)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-31
    Beschreibung: The requirements for life support systems, both biological and physical-chemical, for long-term human attended space missions are under serious study throughout NASA. The KSC 'breadboard' project has focused on biomass production using higher plants for atmospheric regeneration and food production in a special biomass production chamber. This chamber is designed to provide information on food crop growth rate, contaminants in the chamber that alter plant growth requirements for atmospheric regeneration, carbon dioxide consumption, oxygen production, and water utilization. The shape and size, mass, and energy requirements in relation to the overall integrity of the biomass production chamber are under constant study.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: NASA. Johnson Space Center, The Second Conference on Lunar Bases and Space Activities of the 21st Century, Volume 2; p 537-542
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 6
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    A review of recent activities in the NASA CELSS program (1987)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-31
    Beschreibung: A CELSS (Controlled Ecological Life Support System) is a device that utilizes photosynthetic organisms and light energy to regenerate waste materials into oxygen and food for a crew in space. The results of studies with the CELSS program suggest that a bioregenerative life support system is a useful and effective method of regenerating consumable materials for crew sustenance. The data suggests that the operation of a CELSS in space is practical if plants can be made to behave predictably in the space environment. Much of the work centers on the biological components of the CELSS system. Ways of achieving high efficiency and long term stability of all components of the system are examined. Included are explorations of the conversion of nonedible cellulose to edible materials, nitrogen fixation by biological and chemical methods, and methods of waste processing. A description is provided of the extent to which a bioregenerative life support system can meet the constraints of the space environment, and the degree is assessed to which system efficiency and stability can be increased during the next decade.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: Controlled Ecological Life Support System: Regenerative Life Support Systems in Space; p 51-55
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 7
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    Plant growth chamber M design (1986)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Beschreibung: Crop production is just one of the many processes involved in establishing long term survival of man in space. The benefits of integrating higher plants into the overall plan was recognized early by NASA through the Closed Ecological Life Support System (CELSS) program. The first step is to design, construct, and operate a sealed (gas, liquid, and solid) plant growth chamber. A 3.6 m diameter by 6.7 m high closed cylinder (previously used as a hypobaric vessel during the Mercury program) is being modified for this purpose. The chamber is mounted on legs with the central axis vertical. Entrance to the chamber is through an airlock. This chamber will be devoted entirely to higher plant experimentation. Any waste treatment, food processing or product storage studies will be carried on outside of this chamber. Its primary purpose is to provide input and output data on solids, liquids, and gases for single crop species and multiple species production using different nutrient delivery systems.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: NASA. Ames Research Center Controlled Ecological Life Support Systems; p 119-128
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 8
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    Criteria for evaluating experiments on crop production in space (1989)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Consideration is given to the development of criteria for successful CELSS experiments on crop production in space. Also, the development of a standard procedure to produce a given expected yield is examined. Factors influencing the success of CELSS experiments are discussed, including environmental limits to growth, efficient use of resources, data collection sensitivity, stress, and the space in which the experiment is performed. The implications of the study for designing CELSS food production systems are noted.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: SAE PAPER 891569
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 9
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    Shuttle Orbiter Atmospheric Revitalization Pressure Control Subsystem (1982)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The Atmospheric Revitalization Pressure Control Subsystem (ARPCS) provides oxygen partial pressure and total pressure control for the habitable atmosphere of the Shuttle for either a one atmosphere environment or an emergency 8 PSIA mode. It consists of a Supply Panel, Control Panel, Cabin Pressure Relief Valves and Electronic Controllers. The panels control and monitor the oxygen and nitrogen supplies. The cabin pressure relief valves protect the habitable environment from overpressurization. Electronic controllers provide proper mixing of the two gases. This paper describes the ARPCS, addresses the changes in hardware that have occurred since the inception of the program; the performance of this subsystem during STS-1 and STS-2; and discusses future operation modes.
    Schlagwort(e): MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Materialart: SAE PAPER 820882
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 10
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    A Shuttle/SpaceLab RF environment survey facility (1974)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: This paper describes some of the basic system considerations of a proposed experiment for monitoring and measuring the global electromagnetic radiation environment. RF spectrum coverage for this spaceborne survey facility is anticipated to be quite broad and will include selected frequency bands ranging from UHF to millimeter waves. By establishing this RF environment survey facility, a broad data base of useful electromagnetic field intensity information will be developed. This, in turn, should help both the regulatory agencies and user community in terms of future frequency planning and system design by avoiding unwarranted interference. It is proposed that this experiment be flown as a future test bed during the Shuttle/Spacelab era for continuously gathering and updating information on earth-emitted electromagnetic emissions on a global scale.
    Schlagwort(e): COMMUNICATIONS AND RADAR
    Materialart: National Telecommunications Conference; Dec 02, 1974 - Dec 04, 1974; San Diego, CA
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
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