ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Hydrogen peroxide on the surface of Europa (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-26
    Description: Spatially resolved infrared and ultraviolet wavelength spectra of Europa's leading, anti-jovian quadrant observed from the Galileo spacecraft show absorption features resulting from hydrogen peroxide. Comparisons with laboratory measurements indicate surface hydrogen peroxide concentrations of about 0.13 percent, by number, relative to water ice. The inferred abundance is consistent with radiolytic production of hydrogen peroxide by intense energetic particle bombardment and demonstrates that Europa's surface chemistry is dominated by radiolysis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carlson, R W -- Anderson, M S -- Johnson, R E -- Smythe, W D -- Hendrix, A R -- Barth, C A -- Soderblom, L A -- Hansen, G B -- McCord, T B -- Dalton, J B -- Clark, R N -- Shirley, J H -- Ocampo, A C -- Matson, D L -- New York, N.Y. -- Science. 1999 Mar 26;283(5410):2062-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. rcarlson@lively.jpl.nasa.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10092224" target="_blank"〉PubMed〈/a〉
    Keywords: *Extraterrestrial Environment ; Hydrogen Peroxide/*analysis/chemistry ; Ice ; *Jupiter ; Spectrophotometry, Infrared ; Spectrophotometry, Ultraviolet ; Water/chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Salts on Europa's surface detected by Galileo's near infrared mapping spectrometer. The NIMS Team (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-06-20
    Description: Reflectance spectra in the 1- to 2.5-micrometer wavelength region of the surface of Europa obtained by Galileo's Near Infrared Mapping Spectrometer exhibit distorted water absorption bands that indicate the presence of hydrated minerals. The laboratory spectra of hydrated salt minerals such as magnesium sulfates and sodium carbonates and mixtures of these minerals provide a close match to the Europa spectra. The distorted bands are only observed in the optically darker areas of Europa, including the lineaments, and may represent evaporite deposits formed by water, rich in dissolved salts, reaching the surface from a water-rich layer underlying an ice crust.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCord, T B -- Hansen, G B -- Fanale, F P -- Carlson, R W -- Matson, D L -- Johnson, T V -- Smythe, W D -- Crowley, J K -- Martin, P D -- Ocampo, A -- Hibbitts, C A -- Granahan, J C -- New York, N.Y. -- Science. 1998 May 22;280(5367):1242-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9596573" target="_blank"〉PubMed〈/a〉
    Keywords: Carbonates ; Evolution, Planetary ; Ice ; *Jupiter ; Magnesium Sulfate ; Oceans and Seas ; *Salts ; Spectrophotometry, Infrared ; Temperature ; *Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Organics and other molecules in the surfaces of Callisto and Ganymede (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-10
    Description: Five absorption features are reported at wavelengths of 3.4, 3.88, 4. 05, 4.25, and 4.57 micrometers in the surface materials of the Galilean satellites Callisto and Ganymede from analysis of reflectance spectra returned by the Galileo mission near-infrared mapping spectrometer. Candidate materials include CO2, organic materials (such as tholins containing C(triple bond)N and C-H), SO2, and compounds containing an SH-functional group; CO2, SO2, and perhaps cyanogen [(CN)2] may be present within the surface material itself as collections of a few molecules each. The spectra indicate that the primary surface constituents are water ice and hydrated minerals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCord, T B -- Carlson, R W -- Smythe, W D -- Hansen, G B -- Clark, R N -- Hibbitts, C A -- Fanale, F P -- Granahan, J C -- Segura, M -- Matson, D L -- Johnson, T V -- Martin, P D -- New York, N.Y. -- Science. 1997 Oct 10;278(5336):271-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, USA. tom@kahana.pgd.hawaii.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9323203" target="_blank"〉PubMed〈/a〉
    Keywords: Carbon Dioxide/*analysis ; Hydrocarbons/analysis ; Ice ; *Jupiter ; Nitriles/*analysis ; Spectrum Analysis ; Sulfur/*analysis ; Sulfur Dioxide/analysis ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Near-infrared spectroscopy and spectral mapping of Jupiter and the Galilean satellites: results from Galileo's initial orbit (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-18
    Description: The Near Infrared Mapping Spectrometer performed spectral studies of Jupiter and the Galilean satellites during the June 1996 perijove pass of the Galileo spacecraft. Spectra for a 5-micrometer hot spot on Jupiter are consistent with the absence of a significant water cloud above 8 bars and with a depletion of water compared to that predicted for solar composition, corroborating results from the Galileo probe. Great Red Spot (GRS) spectral images show that parts of this feature extend upward to 240 millibars, although considerable altitude-dependent structure is found within it. A ring of dense clouds surrounds the GRS and is lower than it by 3 to 7 kilometers. Spectra of Callisto and Ganymede reveal a feature at 4. 25 micrometers, attributed to the presence of hydrated minerals or possibly carbon dioxide on their surfaces. Spectra of Europa's high latitudes imply that fine-grained water frost overlies larger grains. Several active volcanic regions were found on Io, with temperatures of 420 to 620 kelvin and projected areas of 5 to 70 square kilometers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carlson, R -- Smythe, W -- Baines, K -- Barbinis, E -- Becker, K -- Burns, R -- Calcutt, S -- Calvin, W -- Clark, R -- Danielson, G -- Davies, A -- Drossart, P -- Encrenaz, T -- Fanale, F -- Granahan, J -- Hansen, G -- Herrera, P -- Hibbitts, C -- Hui, J -- Irwin, P -- Johnson, T -- Kamp, L -- Kieffer, H -- Leader, F -- Weissman, P -- New York, N.Y. -- Science. 1996 Oct 18;274(5286):385-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8832878" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/analysis ; Carbon Dioxide/analysis ; Extraterrestrial Environment ; Hydroxides/analysis ; *Jupiter ; Methane/analysis ; Phosphines/analysis ; Spectroscopy, Near-Infrared ; Water/analysis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    RAG mutations in human B cell-negative SCID (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-04
    Description: Patients with human severe combined immunodeficiency (SCID) can be divided into those with B lymphocytes (B+ SCID) and those without (B- SCID). Although several genetic causes are known for B+ SCID, the etiology of B- SCID has not been defined. Six of 14 B- SCID patients tested were found to carry a mutation of the recombinase activating gene 1 (RAG-1), RAG-2, or both. This mutation resulted in a functional inability to form antigen receptors through genetic recombination and links a defect in one of the site-specific recombination systems to a human disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwarz, K -- Gauss, G H -- Ludwig, L -- Pannicke, U -- Li, Z -- Lindner, D -- Friedrich, W -- Seger, R A -- Hansen-Hagge, T E -- Desiderio, S -- Lieber, M R -- Bartram, C R -- New York, N.Y. -- Science. 1996 Oct 4;274(5284):97-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Molecular Biology, University of Ulm, D-89070 Ulm, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8810255" target="_blank"〉PubMed〈/a〉
    Keywords: B-Lymphocytes/immunology ; Cell Line ; Consanguinity ; *DNA-Binding Proteins ; Female ; Genes, Immunoglobulin ; Genes, Recessive ; *Homeodomain Proteins ; Humans ; Immunophenotyping ; Male ; Mutation ; Nuclear Proteins ; Polymorphism, Single-Stranded Conformational ; Proteins/*genetics ; Receptors, Antigen, T-Cell/genetics ; Recombination, Genetic ; Sequence Deletion ; Severe Combined Immunodeficiency/*genetics/immunology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Evaluation and Selection of Replacement Thermal Control Materials for the Hubble Space Telescope (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The mechanical and optical properties of the metallized Teflon(Registered Trademark) FEP thermal control materials on the Hubble Space Telescope (HST) have degraded over the nearly seven years the telescope has been in orbit. Given the damage to the outer layer of the multi-layer insulation (MLI) that was apparent during the second servicing mission (SM2), the decision was made to replace the outer layer during subsequent servicing missions. A Failure Review Board was established to investigate the damage to the MLI and identify a replacement material. The replacement material had to meet the stringent thermal requirements of the spacecraft and maintain structural integrity for at least ten years. Ten candidate materials were selected and exposed to ten-year HST-equivalent doses of simulated orbital environments. Samples of the candidates were exposed sequentially to low and high energy electrons and protons, atomic oxygen, x-ray radiation, ultraviolet radiation and thermal cycling. Following the exposures, the mechanical integrity and optical properties of the candidates were investigated using Optical Microscopy, Scanning Electron Microscopy (SEM), and a Laboratory Portable Spectroreflectometer (LPSR). Based on the results of these simulations and analyses, the FRB selected a replacement material and two alternates that showed the highest likelihood of providing the requisite thermal properties and surviving for ten years in orbit.q
    Keywords: Astronomy
    Type: Science of Advanced Materials and Process Engineering: Series 43|SAMPE 1998; May 31, 1998 - Jun 04, 1998; Anaheim, CA; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Degradation of Hubble Space Telescope Metallized Teflon(trademark) FEP Thermal Control Materials (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The mechanical and optical properties of the metallized Teflon Fluorinated Ethylene Propylene (FEP) thermal control materials on the Hubble Space Telescope (HST) have degraded over the seven years the telescope has been in orbit. Astronaut observations and photographic documentation from the Second Servicing Mission revealed severe cracks of the multi-layer insulation (MLI) blanket outer layer in many locations around the telescope, particularly on solar facing surfaces. Two samples, the outer Teflon FEP MLI layer and radiator surfaces, were characterized post- mission through exhaustive mechanical, thermal, chemical, and optical testing. The observed damage to the thermal control materials, the sample retrieval and handling, and the significant changes to the radiator surfaces of HST will be discussed. Each of these issues is addressed with respect to current and future mission requirements.
    Keywords: Astronomy
    Type: May 31, 1998 - Jun 04, 1998; Anaheim, CA; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    Analysis of Retrieved Hubble Space Telescope Thermal Control Materials (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The mechanical and optical properties of the thermal control materials on the Hubble Space Telescope (HST) have degraded over the nearly seven years the telescope has been in orbit. Astronaut observations and photographs from the Second Servicing Mission (SM2) revealed large cracks in the metallized Teflon FEP, the outer-layer of the multi-layer insulation (MLI), in many locations around the telescope. Also, the emissivity of the bonded metallized Teflon FEP radiator surfaces of the telescope has increased over time. Samples of the top layer of the MLI and radiator material were retrieved during SM2, and a thorough investigation into the de-radiation followed in order to determine the primary cause of the damage. Mapping of the cracks on HST and the ground testing showed that thermal cycling with deep-layer damage from electron and proton radiation are necessary to cause the observed embrittlement. Further, strong, evidence was found indicating that chain scission (reduced molecular weight) is the dominant form of damage to the metallized Teflon FEP.
    Keywords: Astronomy
    Type: Science of Advanced Materials and Process Engineering; May 31, 1998 - Jun 04, 1998; Anaheim, CA; United States|Science of Advanced Materials and Process Engineering; Series 43
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 9
    facet.materialart.
    Unknown
    Asteroseismology of White Dwarf Stars (1997)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The primary purpose of this investigation has been to study various aspects of multimode pulsations in variable white dwarfs. In particular, nonlinear interactions among pulsation modes in white dwarfs (and, to some extent, in other variable stars), analysis of recent observations where such interactions are important, and preliminary work on the effects of crystallization in cool white dwarfs are reported.
    Keywords: Astronomy
    Type: NASA/CR-97-207468 , NAS 1.26:207468
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unknown
    HST Multi Layer Insulation Failure Review Board Findings (1998)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: The mechanical and optical properties of the thermal control materials on the Hubble Space Telescope (HST) have degraded over the nearly seven years the telescope has been in orbit. Astronaut observations and photographs from the Second Servicing Mission (SM2) revealed large cracks in the metallized Teflon fluorinated ethylene propylene (FEP), the outer layer of the multi-layer insulation (MLI), in many locations around the telescope. Also, the absorptance of the bonded metallized Teflon FEP radiator surfaces of the telescope has increased over time. A Failure Review Board was established to determine the damage mechanism and to identify a replacement material. Samples of the top layer of the MLI and radiator material were retrieved during SM2, and a thorough investigation into the degradation followed in order to determine the primary cause of the damage. Mapping of the cracks on HST and the ground testing showed that thermal cycling with deep-layer damage from electron and proton radiation are necessary to cause the observed embrittlement. Further, strong evidence was found indicating that chain scission (reduced molecular weight) is the dominant form of damage to the metallized Teflon FEP. Given the damage to the outer layer of the multi-layer insulation (MLI) that was apparent during the second servicing mission (SM2), the decision was made to replace the outer layer during subsequent servicing missions. The replacement material had to meet the stringent thermal requirements of the spacecraft and maintain structural integrity for at least ten years. Ten candidate materials were exposed to simulated orbital environments and a replacement material was selected. This presentation will summarize the FRB results, in particular, the analysis of the retrieved specimens, the results of the simulated environmental exposures, and the selection of the replacement material. The NASA Space Environments and Effects community needs to hear these results because they reveal that Teflon (FEP) films should not be used in LEO as routinely as they are today.
    Keywords: Astronomy
    Type: 1998 SEE Flight Experiments; Jun 23, 1998 - Jun 25, 1998; Greenbelt, MD; United States
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...