Search Results - "De Souza, A. P."
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Detection of Silica-Rich Deposits on Mars
Published in Science (American Association for the Advancement of Science) (23-05-2008)“…Mineral deposits on the martian surface can elucidate ancient environmental conditions on the planet. Opaline silica deposits (as much as 91 weight percent…”
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Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer
Published in Science (American Association for the Advancement of Science) (03-12-2004)“…Mössbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich…”
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Mössbauer mineralogy of rock, soil, and dust at Gusev crater, Mars: Spirit's journey through weakly altered olivine basalt on the plains and pervasively altered basalt in the Columbia Hills
Published in Journal of Geophysical Research - Planets (01-02-2006)“…The Mössbauer spectrometer on Spirit measured the oxidation state of Fe, identified Fe‐bearing phases, and measured relative abundances of Fe among those…”
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Iron mineralogy and aqueous alteration from Husband Hill through Home Plate at Gusev Crater, Mars: Results from the Mössbauer instrument on the Spirit Mars Exploration Rover
Published in Journal of Geophysical Research - Planets (01-12-2008)“…Spirit's Mössbauer (MB) instrument determined the Fe mineralogy and oxidation state of 71 rocks and 43 soils during its exploration of the Gusev plains and the…”
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Geochemical and mineralogical indicators for aqueous processes in the Columbia Hills of Gusev crater, Mars
Published in Journal of Geophysical Research - Planets (01-01-2006)“…Water played a major role in the formation and alteration of rocks and soils in the Columbia Hills. The extent of alteration ranges from moderate to extensive…”
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Mineralogy at Gusev Crater from the Mössbauer Spectrometer on the Spirit Rover
Published in Science (American Association for the Advancement of Science) (06-08-2004)“…Mössbauer spectra measured on Mars by the Spirit rover during the primary mission are characterized by two ferrous iron doublets (olivine and probably…”
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Expression of Xylella fastidiosa Fimbrial and Afimbrial Proteins during Biofilm Formation
Published in Applied and Environmental Microbiology (01-07-2010)“…Complete sequencing of the Xylella fastidiosa genome revealed characteristics that have not been described previously for a phytopathogen. One characteristic…”
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Ancient Impact and Aqueous Processes at Endeavour Crater, Mars
Published in Science (American Association for the Advancement of Science) (04-05-2012)“…The rover Opportunity has investigated the rim of Endeavour Crater, a large ancient impact crater on Mars. Basaltic breccias produced by the impact form the…”
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Athena MIMOS II Mössbauer spectrometer investigation
Published in Journal of Geophysical Research - Planets (01-12-2003)“…Mössbauer spectroscopy is a powerful tool for quantitative mineralogical analysis of Fe‐bearing materials. The miniature Mössbauer spectrometer MIMOS II is a…”
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Gusev crater: Wind-related features and processes observed by the Mars Exploration Rover Spirit
Published in Journal of Geophysical Research - Planets (01-01-2006)“…Wind‐related features observed by the rover Spirit in Gusev crater, Mars, include patches of soil on the surface, some of which are organized into bed forms…”
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Tropical maize germplasm: what can we say about its genetic diversity in the light of molecular markers?
Published in Theoretical and applied genetics (01-11-2005)“…Knowledge about genetic variability of a crop allows for more efficient and effective use of resources in plant improvement programs. The genetic variation…”
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Ancient Aqueous Environments at Endeavour Crater, Mars
Published in Science (American Association for the Advancement of Science) (24-01-2014)“…Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the…”
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Analysis of genetic similarity detected by AFLP and coefficient of parentage among genotypes of sugar cane (Saccharum spp.)
Published in Theoretical and applied genetics (2002)“…Despite the economical importance of sugar cane, until the present-date no studies have been carried out to determine the correlation of the molecular-based…”
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Nitrogen cycling in tropical Atlantic Forest differing in exposure to urban atmospheric nitrogen deposition
Published in Plant and soil (01-11-2017)“…Background and aims Inorganic nitrogen (N)—ammonium (NH4+-N) and nitrate (NO3−-N)—deposition to tropical forests near urban areas frequently exceeds 5-10 kg…”
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Hematite spherules at Meridiani: Results from MI, Mini-TES, and Pancam
Published in Journal of Geophysical Research - Planets (01-12-2008)“…We report on observations of hematite‐bearing spherules at Meridiani Planum made using the Microscopic Imager (MI), Mini‐Thermal Emission Spectrometer…”
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Genetic diversity and population structure analysis of the tropical pasture grass Brachiaria humidicola based on microsatellites, cytogenetics, morphological traits, and geographical origin
Published in Genome (01-09-2010)“…Brachiaria humidicola (Rendle) Schweick. is a warm-season grass commonly used as forage in the tropics. Accessions of this species were collected in eastern…”
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Structure, stratigraphy, and origin of Husband Hill, Columbia Hills, Gusev Crater, Mars
Published in Journal of Geophysical Research - Planets (01-06-2008)“…The strike and dip of lithologic units imaged in stereo by the Spirit rover in the Columbia Hills using three‐dimensional imaging software shows that measured…”
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Transsylvian amygdalohippocampectomy for mesial temporal lobe epilepsy: Comparison of three different approaches
Published in Epilepsia (Copenhagen) (01-02-2021)“…Objective This study's objective was to compare the transinsular (TI‐AH), transuncus (TU‐AH), and temporopolar (TP‐AH) amygdalohippocampectomy approaches…”
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Respiratory syncytial virus induces phosphorylation of mTOR at ser2448 in CD8 T cells from nasal washes of infected infants
Published in Clinical and experimental immunology (01-02-2016)“…Summary Respiratory syncytial virus (RSV)‐specific CD8+ T cell responses do not protect against reinfection. Activation of mammalian target of rapamycin (mTOR)…”
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Mössbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars: Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits
Published in Journal of Geophysical Research - Planets (01-12-2006)“…The Mössbauer (MB) spectrometer on Opportunity measured the Fe oxidation state, identified Fe‐bearing phases, and measured relative abundances of Fe among…”
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