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  • *Phenotype  (1)
  • 04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration  (1)
  • Chiroptera/*anatomy & histology/classification/*physiology  (1)
  • 2010-2014  (3)
  • 1945-1949
  • 2010  (3)
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  • 2010-2014  (3)
  • 1945-1949
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  • 2010  (3)
  • 1
    Publikationsdatum: 2017-04-04
    Beschreibung: In November 2007 we conducted a water-column and seafloor mapping study of the submarine volcanoes of the Aeolian Arc in the southern Tyrrhenian Sea aboard the R/V Urania. A total of 26 CTD casts were completed, 13 vertical casts and 13 tows. In addition to in situ measurements of temperature, conductivity, pressure and suspended particles, we also collected discrete samples for helium isotopes, methane, and trace metals. The helium isotope ratio, which is known to be an unambiguous indicator of hydrothermal input, showed a clear excess above background at 5 out of the 10 submarine volcanoes surveyed. We found the strongest helium anomaly over Marsili seamount, where the 3He/4He ratio reached maximum values of 3He = 23% at 610 m depth compared with background values of ~ 7%. We also found smaller but distinct 3He anomalies over Enerato, Eolo, Palinuro, and Secca del Capo. We interpret these results as indicating the presence of hydrothermal activity on these 5 seamounts. Hydrothermal venting has been documented at subsea vents offshore of the islands of Panarea, Stromboli, and Vulcano (Dando et al., 1999; Di Roberto et al., 2008), and hydrothermal deposits have been sampled on many of the submarine volcanoes of the Aeolian Arc (Dekov and Savelli, 2004). However, as far as we know this is the first evidence of present day hydrothermal activity on Marsili, Enerato, and Eolo. Samples collected over Filicudi, Glabro, Lamentini, Sisifo, and Alcioni had 3He very close to the regional background values, suggesting either absence of or very weak hydrothermal activity on these seamounts. Helium isotope measurements from the background hydrocasts positioned between the volcanoes revealed the presence of an excess in 3He throughout the SE Tyrrhenian Sea. These background profiles reach a consistent maximum of about 3He = 11% at 2300 m depth. Historical helium profiles collected in the central and northern Tyrrhenian Sea in 1987 and 1997 do not show this deep 3He maximum (W. Roether and B. Klein, private comm.). Furthermore, the maximum is too deep to be attributed to the volcanoes of the Aeolian Arc, which are active at 〈1000 m depth. We are currently conducting additional measurements to determine whether this deep 3He maximum is from a local hydrothermal source or is somehow related to the deep water mass transient which occurred in the eastern Mediterranean in the 1990’s.
    Beschreibung: American Geophysical Union
    Beschreibung: Published
    Beschreibung: San Francisco
    Beschreibung: 4.6. Oceanografia operativa per la valutazione dei rischi in aree marine
    Beschreibung: open
    Schlagwort(e): submarine ; hydrothermalism ; helium isotopes ; 04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Conference paper
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2010-01-26
    Beschreibung: Echolocation is an active form of orientation in which animals emit sounds and then listen to reflected echoes of those sounds to form images of their surroundings in their brains. Although echolocation is usually associated with bats, it is not characteristic of all bats. Most echolocating bats produce signals in the larynx, but within one family of mainly non-echolocating species (Pteropodidae), a few species use echolocation sounds produced by tongue clicks. Here we demonstrate, using data obtained from micro-computed tomography scans of 26 species (n = 35 fluid-preserved bats), that proximal articulation of the stylohyal bone (part of the mammalian hyoid apparatus) with the tympanic bone always distinguishes laryngeally echolocating bats from all other bats (that is, non-echolocating pteropodids and those that echolocate with tongue clicks). In laryngeally echolocating bats, the proximal end of the stylohyal bone directly articulates with the tympanic bone and is often fused with it. Previous research on the morphology of the stylohyal bone in the oldest known fossil bat (Onychonycteris finneyi) suggested that it did not echolocate, but our findings suggest that O. finneyi may have used laryngeal echolocation because its stylohyal bones may have articulated with its tympanic bones. The present findings reopen basic questions about the timing and the origin of flight and echolocation in the early evolution of bats. Our data also provide an independent anatomical character by which to distinguish laryngeally echolocating bats from other bats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Veselka, Nina -- McErlain, David D -- Holdsworth, David W -- Eger, Judith L -- Chhem, Rethy K -- Mason, Matthew J -- Brain, Kirsty L -- Faure, Paul A -- Fenton, M Brock -- MOP-89852/Canadian Institutes of Health Research/Canada -- England -- Nature. 2010 Feb 18;463(7283):939-42. doi: 10.1038/nature08737. Epub 2010 Jan 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Robarts Research Institute.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20098413" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Evolution ; Bone Conduction/*physiology ; Bone and Bones/anatomy & histology/*physiology ; Chiroptera/*anatomy & histology/classification/*physiology ; Ear/anatomy & histology/physiology ; Echolocation/*physiology ; Flight, Animal/physiology ; Fossils ; Larynx/*physiology ; Orientation/physiology ; Skull/anatomy & histology/physiology ; Tongue/physiology
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2010-03-26
    Beschreibung: Although pioneered by human geneticists as a potential solution to the challenging problem of finding the genetic basis of common human diseases, genome-wide association (GWA) studies have, owing to advances in genotyping and sequencing technology, become an obvious general approach for studying the genetics of natural variation and traits of agricultural importance. They are particularly useful when inbred lines are available, because once these lines have been genotyped they can be phenotyped multiple times, making it possible (as well as extremely cost effective) to study many different traits in many different environments, while replicating the phenotypic measurements to reduce environmental noise. Here we demonstrate the power of this approach by carrying out a GWA study of 107 phenotypes in Arabidopsis thaliana, a widely distributed, predominantly self-fertilizing model plant known to harbour considerable genetic variation for many adaptively important traits. Our results are dramatically different from those of human GWA studies, in that we identify many common alleles of major effect, but they are also, in many cases, harder to interpret because confounding by complex genetics and population structure make it difficult to distinguish true associations from false. However, a-priori candidates are significantly over-represented among these associations as well, making many of them excellent candidates for follow-up experiments. Our study demonstrates the feasibility of GWA studies in A. thaliana and suggests that the approach will be appropriate for many other organisms.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3023908/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3023908/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atwell, Susanna -- Huang, Yu S -- Vilhjalmsson, Bjarni J -- Willems, Glenda -- Horton, Matthew -- Li, Yan -- Meng, Dazhe -- Platt, Alexander -- Tarone, Aaron M -- Hu, Tina T -- Jiang, Rong -- Muliyati, N Wayan -- Zhang, Xu -- Amer, Muhammad Ali -- Baxter, Ivan -- Brachi, Benjamin -- Chory, Joanne -- Dean, Caroline -- Debieu, Marilyne -- de Meaux, Juliette -- Ecker, Joseph R -- Faure, Nathalie -- Kniskern, Joel M -- Jones, Jonathan D G -- Michael, Todd -- Nemri, Adnane -- Roux, Fabrice -- Salt, David E -- Tang, Chunlao -- Todesco, Marco -- Traw, M Brian -- Weigel, Detlef -- Marjoram, Paul -- Borevitz, Justin O -- Bergelson, Joy -- Nordborg, Magnus -- GM057994/GM/NIGMS NIH HHS/ -- GM073822/GM/NIGMS NIH HHS/ -- GM078536/GM/NIGMS NIH HHS/ -- GM62932/GM/NIGMS NIH HHS/ -- P42ES007373/ES/NIEHS NIH HHS/ -- R01 GM057994/GM/NIGMS NIH HHS/ -- R01 GM057994-05A1/GM/NIGMS NIH HHS/ -- R01 GM062932/GM/NIGMS NIH HHS/ -- R01 GM062932-05/GM/NIGMS NIH HHS/ -- R01 GM073822/GM/NIGMS NIH HHS/ -- R01 GM073822-01A1/GM/NIGMS NIH HHS/ -- R01 GM078536-01A1/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Jun 3;465(7298):627-31. doi: 10.1038/nature08800. Epub 2010 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular and Computational Biology, University of Southern California, Los Angeles, California 90089, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20336072" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Arabidopsis/*classification/*genetics ; Arabidopsis Proteins/genetics ; Flowers/genetics ; Genes, Plant/genetics ; Genetic Loci/genetics ; Genome, Plant/*genetics ; *Genome-Wide Association Study ; Genotype ; Immunity, Innate/genetics ; Inbreeding ; *Phenotype ; Polymorphism, Single Nucleotide/genetics
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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