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
    Investigating the Stratigraphy of Mare Imbrium Flow Emplacement with Earth-Based Radar (2016)
    Wiley
    Details
    Publication Date: 2016-07-31
    Description: The lunar maria are the product of extensive basaltic volcanism that flooded widespread portions of the Moon's surface. Constraining mare volcanic history therefore provides a window into the endogenic processes responsible for shaping the Moon. Due to the low magma viscosity and the associated thin nature of lava units, the majority of mare surface structures are masked and subdued by impact regolith. Subtle individual mare flow morphologies, coupled with spatial limitations in the use of crater size distributions to distinguish surface units close in age, restricts our understanding of mare stratigraphy. Earth-based 70-cm wavelength (P-band) radar can reveal features beneath the regolith and highlight very subtle changes in the ilmenite content of the flows, providing a unique means to map mare units. Here we map volcanic units in Mare Imbrium using high-resolution (200 m/pixel), Earth-based P-band data. Situated within the heat-producing KREEP terrane, Mare Imbrium experienced some of the most long-lived (and recent) lunar volcanism, and its surface exhibits a significant diversity of basaltic chemistry. Our investigation identifies at least four distinct stages of volcanic activity, originating from multiple sources within Imbrium. The most recent of these stages comprises extensive, yet relatively thin volcanic flow units that left remnant kipukas of older mare material distributed across much of the basin. From a future mission perspective, it may be possible to collect samples expressing a wide range in age from small areas of Mare Imbrium. Our map also places important constraints on the interpretation of the Chang'E-3 Lunar Penetrating Radar measurements.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    SHARAD Detection and Characterization of Subsurface Water Ice Deposits in Utopia Planitia, Mars (2016)
    Wiley
    Details
    Publication Date: 2016-09-16
    Description: Morphological analyses of Utopia Planitia, Mars, have led to the hypothesis that the region contains a substantial amount of near-surface ice. This paper tests this hypothesis using ground-penetrating radar techniques. We have identified an expansive radar-reflective region spanning approximately 375,000km 2  in SHAllow RADar (SHARAD) data over western Utopia Planitia. The SHARAD reflective regions coincides with high densities of scalloped depressions and polygonal terrain. The reflectors are associated with layered mesas  ∼ 80-170 m thick. We find a value of 2.8 ± 0.8 for the dielectric constant of the material overlying the reflectors. This work finds that the dielectric constant is consistent with a mixture of ice, air, and dust, containing a water ice volume up to 14,300km 3 in this unit.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Like-acetylglucosaminyltransferase (LARGE)-dependent modification of dystroglycan at Thr-317/319 is required for laminin binding and arenavirus infection [Medical Sciences] (2011)
    National Academy of Sciences
    Details
    Publication Date: 2011-10-19
    Description: α-dystroglycan is a highly O-glycosylated extracellular matrix receptor that is required for anchoring of the basement membrane to the cell surface and for the entry of Old World arenaviruses into cells. Like-acetylglucosaminyltransferase (LARGE) is a key molecule that binds to the N-terminal domain of α-dystroglycan and attaches ligand-binding moieties to phosphorylated O-mannose on α-dystroglycan. Here we show that the LARGE modification required for laminin- and virus-binding occurs on specific Thr residues located at the extreme N terminus of the mucin-like domain of α-dystroglycan. Deletion and mutation analyses demonstrate that the ligand-binding activity of α-dystroglycan is conferred primarily by LARGE modification at Thr-317 and -319, within the highly conserved first 18 amino acids of the mucin-like domain. The importance of these paired residues in laminin-binding and clustering activity on myoblasts and in arenavirus cell entry is confirmed by mutational analysis with full-length dystroglycan. We further demonstrate that a sequence of five amino acids, Thr317ProThr319ProVal, contains phosphorylated O-glycosylation and, when modified by LARGE is sufficient for laminin-binding. Because the N-terminal region adjacent to the paired Thr residues is removed during posttranslational maturation of dystroglycan, our results demonstrate that the ligand-binding activity resides at the extreme N terminus of mature α-dystroglycan and is crucial for α-dystroglycan to coordinate the assembly of extracellular matrix proteins and to bind arenaviruses on the cell surface.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Spectroscopic observations of bright and dark emission features on the night side of venus (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-31
    Description: Near-infrared spectra of a bright and a dark thermal emission feature on the night side of Venus have been obtained from 2.2 to 2.5 micrometers (microm) at a spectral resolution of 1200 to 1500. Both bright and dark features show numerous weak absorption bands produced by CO(2), CO, water vapor, and other gases. The bright feature (hot spot) emits more radiation than the dark feature (cold spot) throughout this spectral region, but the largest contrasts occur between 2.21 and 2.32 microm, where H(2)SO(4) clouds and a weak CO(2) band provide the only known sources of extinction. The contrast decreases by 55 to 65 percent at wavelengths longer than 2.34 microm, where CO, clouds, and water vapor also absorb and scatter upwelling radiation. This contrast reduction may provide direct spectroscopic evidence for horizontal variations in the water vapor concentrations in the Venus atmosphere at levels below the cloud tops.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, J F 3rd -- Crisp, D -- Lucey, P G -- Ozoroski, T A -- Sinton, W M -- Willis, S C -- Campbell, B A -- New York, N.Y. -- Science. 1991 May 31;252(5010):1293-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17842954" target="_blank"〉PubMed〈/a〉
    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
    Mars north polar deposits: stratigraphy, age, and geodynamical response (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-05-17
    Description: The Shallow Radar (SHARAD) on the Mars Reconnaissance Orbiter has imaged the internal stratigraphy of the north polar layered deposits of Mars. Radar reflections within the deposits reveal a laterally continuous deposition of layers, which typically consist of four packets of finely spaced reflectors separated by homogeneous interpacket regions of nearly pure ice. The packet/interpacket structure can be explained by approximately million-year periodicities in Mars' obliquity or orbital eccentricity. The observed approximately 100-meter maximum deflection of the underlying substrate in response to the ice load implies that the present-day thickness of an equilibrium elastic lithosphere is greater than 300 kilometers. Alternatively, the response to the load may be in a transient state controlled by mantle viscosity. Both scenarios probably require that Mars has a subchondritic abundance of heat-producing elements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, Roger J -- Zuber, Maria T -- Smrekar, Suzanne E -- Mellon, Michael T -- Head, James W -- Tanaka, Kenneth L -- Putzig, Nathaniel E -- Milkovich, Sarah M -- Campbell, Bruce A -- Plaut, Jeffrey J -- Safaeinili, Ali -- Seu, Roberto -- Biccari, Daniela -- Carter, Lynn M -- Picardi, Giovanni -- Orosei, Roberto -- Mohit, P Surdas -- Heggy, Essam -- Zurek, Richard W -- Egan, Anthony F -- Giacomoni, Emanuele -- Russo, Federica -- Cutigni, Marco -- Pettinelli, Elena -- Holt, John W -- Leuschen, Carl J -- Marinangeli, Lucia -- New York, N.Y. -- Science. 2008 May 30;320(5880):1182-5. doi: 10.1126/science.1157546. Epub 2008 May 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Southwest Research Institute, Boulder, CO 80302, USA. roger@boulder.swri.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18483402" target="_blank"〉PubMed〈/a〉
    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
    3D reconstruction of the source and scale of buried young flood channels on Mars (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-03-09
    Description: Outflow channels on Mars are interpreted as the product of gigantic floods due to the catastrophic eruption of groundwater that may also have initiated episodes of climate change. Marte Vallis, the largest of the young martian outflow channels (〈500 million years old), is embayed by lava flows that hinder detailed studies and comparisons with older channel systems. Understanding Marte Vallis is essential to our assessment of recent Mars hydrologic activity during a period otherwise considered to be cold and dry. Using data from the Shallow Radar sounder on the Mars Reconnaissance Orbiter, we present a three-dimensional (3D) reconstruction of buried channels on Mars and provide estimates of paleohydrologic parameters. Our work shows that Cerberus Fossae provided the waters that carved Marte Vallis, and it extended an additional 180 kilometers to the east before the emplacement of the younger lava flows. We identified two stages of channel incision and determined that channel depths were more than twice those of previous estimates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morgan, Gareth A -- Campbell, Bruce A -- Carter, Lynn M -- Plaut, Jeffrey J -- Phillips, Roger J -- New York, N.Y. -- Science. 2013 May 3;340(6132):607-10. doi: 10.1126/science.1234787. Epub 2013 Mar 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Earth and Planetary Studies, Smithsonian Institution, Washington, DC, USA. morganga@si.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23470730" target="_blank"〉PubMed〈/a〉
    Keywords: Extraterrestrial Environment ; Floods ; *Mars ; Radar ; *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
  • 7
    facet.materialart.
    Unknown
    Accumulation and erosion of Mars' south polar layered deposits (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-09-22
    Description: Mars' polar regions are covered with ice-rich layered deposits that potentially contain a record of climate variations. The sounding radar SHARAD on the Mars Reconnaissance Orbiter mapped detailed subsurface stratigraphy in the Promethei Lingula region of the south polar plateau, Planum Australe. Radar reflections interpreted as layers are correlated across adjacent orbits and are continuous for up to 150 kilometers along spacecraft orbital tracks. The reflectors are often separated into discrete reflector sequences, and strong echoes are seen as deep as 1 kilometer. In some cases, the sequences are dipping with respect to each other, suggesting an interdepositional period of erosion. In Australe Sulci, layers are exhumed, indicating recent erosion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seu, Roberto -- Phillips, Roger J -- Alberti, Giovanni -- Biccari, Daniela -- Bonaventura, Francesco -- Bortone, Marco -- Calabrese, Diego -- Campbell, Bruce A -- Cartacci, Marco -- Carter, Lynn M -- Catallo, Claudio -- Croce, Anna -- Croci, Renato -- Cutigni, Marco -- Di Placido, Antonio -- Dinardo, Salvatore -- Federico, Costanzo -- Flamini, Enrico -- Fois, Franco -- Frigeri, Alessandro -- Fuga, Oreste -- Giacomoni, Emanuele -- Gim, Yonggyu -- Guelfi, Mauro -- Holt, John W -- Kofman, Wlodek -- Leuschen, Carlton J -- Marinangeli, Lucia -- Marras, Paolo -- Masdea, Arturo -- Mattei, Stefania -- Mecozzi, Riccardo -- Milkovich, Sarah M -- Morlupi, Antonio -- Mouginot, Jeremie -- Orosei, Roberto -- Papa, Claudio -- Paterno, Tobia -- Persi del Marmo, Paolo -- Pettinelli, Elena -- Pica, Giulia -- Picardi, Giovanni -- Plaut, Jeffrey J -- Provenziani, Marco -- Putzig, Nathaniel E -- Russo, Federica -- Safaeinili, Ali -- Salzillo, Giuseppe -- Santovito, Maria Rosaria -- Smrekar, Suzanne E -- Tattarletti, Barbara -- Vicari, Danilo -- New York, N.Y. -- Science. 2007 Sep 21;317(5845):1715-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dipartimento INFOCOM, Universita di Roma "La Sapienza," I-00184 Rome, Italy. roberto.seu@uniroma1.it〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17885128" target="_blank"〉PubMed〈/a〉
    Keywords: Extraterrestrial Environment ; Ice ; *Mars
    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
  • 8
    facet.materialart.
    Unknown
    Massive CO(2) ice deposits sequestered in the south polar layered deposits of Mars (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-04-23
    Description: Shallow Radar soundings from the Mars Reconnaissance Orbiter reveal a buried deposit of carbon dioxide (CO(2)) ice within the south polar layered deposits of Mars with a volume of 9500 to 12,500 cubic kilometers, about 30 times that previously estimated for the south pole residual cap. The deposit occurs within a stratigraphic unit that is uniquely marked by collapse features and other evidence of interior CO(2) volatile release. If released into the atmosphere at times of high obliquity, the CO(2) reservoir would increase the atmospheric mass by up to 80%, leading to more frequent and intense dust storms and to more regions where liquid water could persist without boiling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, Roger J -- Davis, Brian J -- Tanaka, Kenneth L -- Byrne, Shane -- Mellon, Michael T -- Putzig, Nathaniel E -- Haberle, Robert M -- Kahre, Melinda A -- Campbell, Bruce A -- Carter, Lynn M -- Smith, Isaac B -- Holt, John W -- Smrekar, Suzanne E -- Nunes, Daniel C -- Plaut, Jeffrey J -- Egan, Anthony F -- Titus, Timothy N -- Seu, Roberto -- New York, N.Y. -- Science. 2011 May 13;332(6031):838-41. doi: 10.1126/science.1203091. Epub 2011 Apr 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Planetary Science Directorate, Southwest Research Institute, Boulder, CO 80302, USA. roger@boulder.swri.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21512003" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; Carbon Dioxide ; Cold Temperature ; *Dry Ice ; Extraterrestrial Environment ; Ice ; *Mars ; 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
  • 9
    facet.materialart.
    Unknown
    A subsurface depocenter in the South Polar Layered Deposits of Mars (2017)
    Wiley
    Details
    Publication Date: 2017-08-12
    Description: The South Polar Layered Deposits (SPLD) are one of the largest water ice reservoirs on Mars, and their accumulation is driven by variations in the climate primarily controlled by orbital forcings. Patterns of subsurface layering in the SPLD provide important information about past atmospheric dust content, periods of substantial erosion, and variations in local or regional deposition. Here we analyze the SPLD using SHAllow RADar (SHARAD) sounder data to gain a unique perspective on the interior structure of the deposits and to determine what subsurface layers indicate about the preserved climate history. SHARAD data reveal a major deviation from the gently domical layering typical of the SPLD: a subsurface elongate dome. The dome most likely formed due to variations in the accumulation of ice and snow across the cap, with a higher rate occurring in this region over a prolonged period. This SPLD depositional center provides an important marker of south polar climate patterns.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Emergence of interoceptive and exteroceptive control of behavior in rats (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-31
    Description: The role of exteroceptive and interoceptive aversive stimuli in rats 2 to 14 days old was investigated according to an odor aversion paradigm. Amyl acetate odor was paired with eigher peripheral shock, intraperitoneal shock, or lithium chloride poisoning. Intraperitoneal shock was an effective unconditioned stimulus at all ages and produced odor aversions comparable to lithium chloride poisoning; peripheral shock, however, was effective only in rats 10 days of age or older. Interoceptive control of aversively motivated behaviors thus seems to develop before exteroceptive control, and the failure of previous studies to find reliable learning and retention of shock-motivated behaviors before 8 to 10 days of age may be attributable to the site to which shock was applied rather than to insensitivity to shock per se.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haroutunian, V -- Campbell, B A -- New York, N.Y. -- Science. 1979 Aug 31;205(4409):927-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472715" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Avoidance Learning/*physiology ; Behavior, Animal/*physiology ; Conditioning (Psychology)/physiology ; Electroshock ; Perception/*physiology ; Rats ; Retention (Psychology)/physiology ; Smell/physiology
    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
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...