Results 51 to 60 of about 2,000 (198)

Taxonomic and functional characterization of a microbial community from a volcanic englacial ecosystem in Deception Island, Antarctica

Scientific Reports, 2019
Glaciers are populated by a large number of microorganisms including bacteria, archaea and microeukaryotes. Several factors such as solar radiation, nutrient availability and water content greatly determine the diversity and abundance of these microbial ...
Emma Martinez-Alonso, Sonia Pena-Perez, Sandra Serrano, Eva Garcia-Lopez, Alberto Alcazar, Cristina Cid   +5 more
doaj   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès, Guillem Gisbert, Helena Albert, Adelina Geyer, Meritxell Aulinas, Raquel Arasanz, Jordi Ibañez‐Insa, Antonio Polo‐Sánchez, Antonio Álvarez‐Valero, Olga Prieto‐Ballesteros, Santiago Giralt   +10 more
wiley   +1 more source

First results on Martian carbon monoxide from Herschel/HIFI observations [PDF]

, 2010
We report on the initial analysis of Herschel/HIFI carbon monoxide (CO) observations of the Martian atmosphere performed between 11 and 16 April 2010. We selected the (7–6) rotational transitions of the isotopes ^(13)CO at 771 GHz and C^(18)O and 768 GHz
Blake, G. A., Hartogh, P., Lis, D. C.
core  

Abrasion Patch Dehydration Experiment at Bright Angel, Jezero Crater, Using SuperCam Onboard the Mars 2020 Perseverance Rover

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Investigating the stability of hydrated minerals is integral for examining the preservation of rocks for potential Mars Sample Return and has major implications for models that use rover‐based observations to quantify Mars' global water budget.
S. A. Connell, R. C. Wiens, L. Mandon, C. C. Bedford, S. Siljeström, S. Schröder, G. M. Martínez, Á. Vicente‐Retortillo, E. A. Cloutis, D. M. Applin, A. Broz, C. Royer, J. R. Johnson, J. Van Beek, T. Nelson, E. Clavé, F. Poulet, P. Beck, E. Dehouck, T. Fornaro, T. Fouchet, A. Jones, A. Alberini, A. Cousin, K. Hand, K. Uckert, J. A. Rodríguez‐Manfredi, K. M. Stack, the Mars 2020 team   +28 more
wiley   +1 more source

COMPREENDENDO A FORMAÇÃO DE NANOESTRUTURAS EM GELO ASTROFÍSICOS ATRAVÉS DA DINÂMICA MOLECULAR CLÁSSICA

Revista UniVap, 2023
Gelos astrofísicos (formados pela água, entre outras moléculas) atuam como um catalisador e um reservatório de espécies carbonáceas, ambas com grandes implicações para a astrobiologia.
Priscila Alves da Silva, Sergio Pilling Guapyassu de Oliveira, Rodrigo Garcia Amarim   +2 more
doaj   +1 more source

Determine the Elemental Composition of Minerals From Complex Solid‐Solution Series by Raman Spectroscopy: Implications for Mars Exploration Missions

Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1404-1417, November 2025.
This study presents a hierarchical Raman‐based classification model for determining the elemental composition of garnets within complex solid‐solution systems. The workflow combines spectral preprocessing, dimensionality reduction, and two‐level classification: first distinguishing between pyralspite and ugrandite groups, and then classifying ...
Sofia Julve‐Gonzalez, Jose Antonio Manrique, Marco Veneranda, Pilar Renedo, Paula Xiaozhen Vega, Iván Reyes‐Rodríguez, María Mayoral, Sergio Jiménez, Lidia Asenjo, Aurelio Sanz‐Arranz, Elena Charro Huerga, Jaime Delgado Iglesias, Olga Prieto‐Ballesteros, Andoni Moral, Emmanuel Alexis Lalla, Belen Barrios‐Areinamo, Fernando Rull, Guillermo Lopez‐Reyes   +17 more
wiley   +1 more source

Dust, Sand, and Winds Within an Active Martian Storm in Jezero Crater

Geophysical Research Letters, 2022
Rovers and landers on Mars have experienced local, regional, and planetary‐scale dust storms. However, in situ documentation of active lifting within storms has remained elusive.
M. T. Lemmon, M. D. Smith, D. Viudez‐Moreiras, M. de laTorre‐Juarez, A. Vicente‐Retortillo, A. Munguira, A. Sanchez‐Lavega, R. Hueso, G. Martinez, B. Chide, R. Sullivan, D. Toledo, L. Tamppari, T. Bertrand, J. F. Bell III, C. Newman, M. Baker, D. Banfield, J. A. Rodriguez‐Manfredi, J. N. Maki, V. Apestigue   +20 more
doaj   +1 more source

Effects of Mineralogy and UV Radiation on the Detectability of Amino Acids Within the Martian Regolith: The Case for a Combined Chromatographical and Spectroscopical Approach

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract Amino acids are an extremely heterogeneous group of biomolecules essential for life on Earth. Their biosignatures are expected to be easily degraded on the Martian surface as the absence of a thick atmosphere and a magnetosphere leads to most of the solar radiation directly reaching its surface.
Miguel Arribas Tiemblo, Pedro Rayo, María‐Paz Martín‐Redondo, Felipe Gómez   +3 more
wiley   +1 more source

Purple dwarfs : New L subdwarfs from UKIDSS and SDSS [PDF]

, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.The first L subdwarf ...
A.C. Day-Jones, B. Burningham, Baraffe, Burgasser, Burgasser, Burgasser, Burrows, Cushing, D.J. Pinfield, F. Marocco, H.R.A. Jones, J. Gomes, Lodieu, Lodieu, M.C. Galvez-Ortiz, Roberto Saglia, Witte, Z.H. Zhang   +17 more
core   +2 more sources

Dark‐Toned Halite‐Enriched Veins Above the Marker Band Record a Drying Environment in Gale Crater

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract The Martian surface preserves evidence of a global climate transition from wetter to drier conditions, but the nature of the fluids involved in this evolution remains poorly constrained. In Gale crater, the clay‐sulfate transition and presence of evaporite mineral assemblages can provide insights into the properties of these fluids and the ...
A. R. Trussell, J. F. Bell III, W. H. Farrand, E. B. Hughes, A. M. Eng, L. C. Kah, C. D. O’Connell‐Cooper, L. M. Thompson, P. J. Gasda, H. T. Manelski, R. Y. Sheppard, S. G. Banham, C. A. Mondro, B. S. Douglass, J. R. Johnson, G. Paar, O. Gasnault, A. R. Vasvada, F. Gómez, S. Le Mouélic, O. Forni, P.‐Y. Meslin   +21 more
wiley   +1 more source