Search Results - "Stadermann, Frank"
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Auger Nanoprobe analysis of presolar ferromagnesian silicate grains from primitive CR chondrites QUE 99177 and MET 00426
Published in Geochimica et cosmochimica acta (15-04-2009)“…We have investigated the presolar grain inventories of two CR chondrites, QUE 99177 and MET 00426, which are less altered than most members of this meteorite…”
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High Abundances of Circumstellar and Interstellar C-Anomalous Phases in the Primitive CR3 Chondrites QUE 99177 and MET 00426
Published in The Astrophysical journal (01-06-2009)“…QUE 99177 and MET 00426 are the first known CR3 chondrites and have largely escaped the aqueous alteration experienced by most of the CR chondrite group. In…”
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3
Presolar silicate and oxide abundances and compositions in the ungrouped carbonaceous chondrite Adelaide and the K chondrite Kakangari: The effects of secondary processing
Published in Meteoritics & planetary science (01-06-2012)“…– Although it has been suggested that the ungrouped carbonaceous chondrite Adelaide and the K chondrite Kakangari could be considered highly primitive, our…”
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4
An Investigation into the Origin of Fe-Rich Presolar Silicates in Acfer 094
Published in The Astrophysical journal (10-05-2010)“…Presolar silicate and oxide grains from primitive meteorites are recognized as 'stardust' on the basis of their extremely anomalous O isotopic compositions. We…”
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5
Microbial community dynamics and stability during an ammonia-induced shift to syntrophic acetate oxidation
Published in Applied and Environmental Microbiology (01-06-2014)“…Anaerobic digesters rely on the diversity and distribution of parallel metabolic pathways mediated by complex syntrophic microbial communities to maintain…”
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Impact Features on Stardust: Implications for Comet 81P/Wild 2 Dust
Published in Science (American Association for the Advancement of Science) (15-12-2006)“…Particles emanating from comet 81P/Wild 2 collided with the Stardust spacecraft at 6.1 kilometers per second, producing hypervelocity impact features on the…”
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Coordinated Analyses of Presolar Grains in the Allan Hills 77307 and Queen Elizabeth Range 99177 Meteorites
Published in The Astrophysical journal (10-08-2010)“…We report the identification of presolar silicates ({approx}177 ppm), presolar oxides ({approx}11 ppm), and one presolar SiO{sub 2} grain in the Allan Hills…”
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Circumstellar and interstellar material in the CO3 chondrite ALHA77307: An isotopic and elemental investigation
Published in Geochimica et cosmochimica acta (15-09-2012)“…We have carried out a NanoSIMS C, N and O ion imaging study of the CO3.0 chondrite ALHA77307. The distribution of O-anomalous grains in ALHA77307 is similar to…”
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9
Mineralogy and Petrology of Comet 81P/Wild 2 Nucleus Samples
Published in Science (American Association for the Advancement of Science) (15-12-2006)“…The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of…”
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10
Automated NanoSIMS Measurements of Spinel Stardust from the Murray Meteorite
Published in The Astrophysical journal (01-07-2010)“…We report new O isotopic data on 41 presolar oxide grains, 38 MgAl{sub 2}O{sub 4} (spinel) and 3 Al{sub 2}O{sub 3} from the CM2 meteorite Murray, identified…”
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NanoSIMS analysis and Auger electron spectroscopy of silicate and oxide stardust from the carbonaceous chondrite Acfer 094
Published in Geochimica et cosmochimica acta (01-12-2009)“…We have detected 138 presolar silicate, 20 presolar oxide and three presolar complex grains within the carbonaceous chondrite Acfer 094 by NanoSIMS oxygen…”
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12
Aluminum-, Calcium- and Titanium-rich Oxide Stardust in Ordinary Chondrite Meteorites
Published in The Astrophysical journal (01-08-2008)“…We report O-, Al-Mg-, K-, Ca-, and Ti-isotopic data for a total of 96 presolar oxide grains found in residues of several unequilibrated ordinary chondrite…”
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13
Identification of isotopically primitive interplanetary dust particles: A NanoSIMS isotopic imaging study
Published in Geochimica et cosmochimica acta (01-05-2006)“…We have carried out a comprehensive survey of the isotopic compositions (H, B, C, N, O, and S) of a suite of interplanetary dust particles (IDPs), including…”
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Samples of Stars beyond the Solar System: Silicate Grains in Interplanetary Dust
Published in Science (American Association for the Advancement of Science) (04-04-2003)“…We have identified six circumstellar silicate grains within interplanetary dust particles (IDPs). Their extrasolar origins are demonstrated by their extremely…”
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15
Characterization of Presolar Silicate and Oxide Grains in Primitive Carbonaceous Chondrites
Published in The Astrophysical journal (20-02-2007)“…Raster ion imaging of the oxygen isotopes with the NanoSIMS ion microprobe has been used to identify presolar grains in two primitive meteorites. Eleven…”
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Atom-probe analyses of nanodiamonds from Allende
Published in Meteoritics & planetary science (01-03-2014)“…Atom‐probe tomography (APT) is currently the only analytical technique that, due to its spatial resolution and detection efficiency, has the potential to…”
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Circumstellar aluminum oxide and silicon carbide in interplanetary dust particles
Published in Geochimica et cosmochimica acta (15-12-2006)“…A systematic NanoSIMS isotope imaging study of sub-micrometer phases in interplanetary dust particles (IDPs) has led to the discovery of two presolar grain…”
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18
Peptidoglycan induces loss of a nuclear peptidoglycan recognition protein during host tissue development in a beneficial animal-bacterial symbiosis
Published in Cellular microbiology (01-07-2009)“…Peptidoglycan recognition proteins (PGRPs) are mediators of innate immunity and recently have been implicated in developmental regulation. To explore the…”
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A NanoSIMS and Auger Nanoprobe investigation of an isotopically primitive interplanetary dust particle from the 55P/Tempel-Tuttle targeted stratospheric dust collector
Published in Meteoritics & planetary science (01-12-2010)“…– An IDP nicknamed Andric, from a stratospheric dust collector targeted to collect dust from comet 55P/Tempel‐Tuttle, contains five distinct presolar silicate…”
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20
Circumstellar Fe Oxide from the Acfer 094 Carbonaceous Chondrite
Published in The Astrophysical journal (10-01-2008)“…We report the discovery of a unique Fe- and O-bearing circumstellar grain from the Acfer 094 ungrouped carbonaceous chondrite. The grain has a close-to-solar…”
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