Results 101 to 110 of about 7,177 (211)

East Meridiani Planum’s karst geomorphology and biosignature preservation potential: a multi-criteria landing site analysis

Frontiers in Astronomy and Space Sciences
IntroductionFuture Mars astrobiology missions require landing sites that balance scientific potential for biosignature detection with engineering safety.
Shaoqiu Wang
doaj   +1 more source

Microbial Autotrophy Recorded by Carbonate Dual Clumped Isotope Disequilibrium

Geochemistry, Geophysics, Geosystems
The proliferation of microbial carbon fixation is a key control on the evolution of the biosphere and global carbon cycle. Most records of these metabolisms in ancient rocks come from organic matter or fossils, which are not always preserved.
Miquela Ingalls, Hanna C. Leapaldt, Max K. Lloyd   +2 more
doaj   +1 more source

Interpretable Machine Learning Biosignature Detection From Ocean Worlds Analogue CO2 Isotopologue Data

Earth and Space Science
Future missions to icy ocean worlds (OW) such as Europa and Enceladus will evaluate the habitability and potential for biosignatures on these worlds. These missions will benefit from autonomous science and machine learning (ML) methods to process high ...
Lily A. Clough, Victoria DaPoian, Jonathan D. Major, Lauren M. Seyler, Brett A. McKinney, Bethany P. Theiling   +5 more
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Intracellular biomineralization in bacteria

Frontiers in Microbiology, 2014
Wei eLin, Wei eLin, Karim eBenzerara, Damien eFaivre, Yongxin ePan, Yongxin ePan   +5 more
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Biosignatures of an ancient bedrock- and impact structure-hosted deep biosphere: current knowledge and future perspectives

Discover Geoscience
The deep biosphere is thought to have dominated life on Earth for most of its history and played a crucial role in the early evolution of both prokaryotes and eukaryotes.
Jacob Gustafsson, Henrik Drake
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Unveiling unique effector function-related bulk antibody profiles in long-term hemodialysis patients following COVID-19 mRNA booster vaccination

Journal of Microbiology, Immunology and Infection
Background: Hemodialysis patients exhibit a reduced response to vaccination and have different vaccine dose regimens. Vaccines induce antibodies and affect the inflammatory balance through antibody glycosylation and effector functions.
Chia-Yi Chou, Chung-Yi Cheng, Chih-Hsin Lee, Makoto Kuro-O, Tso-Hsiao Chen, San-Yuan Wang, Yung-Kun Chuang, Yun-Jung Yang, Yun-Hsuan Lin, I-Lin Tsai   +9 more
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Bioverse: Potentially Observable Exoplanet Biosignature Patterns under the UV Threshold Hypothesis for the Origin of Life

The Astrophysical Journal
A wide variety of scenarios for the origin of life have been proposed, with many influencing the prevalence and distribution of biosignatures across exoplanet populations.
Martin Schlecker, Dániel Apai, Antonin Affholder, Sukrit Ranjan, Régis Ferrière, Kevin K. Hardegree-Ullman, Tim Lichtenberg, Stéphane Mazevet   +7 more
doaj   +1 more source

Gypsum as a repository of extinct and extant biosignatures at Salar de Pajonales, northern Chile

Frontiers in Astronomy and Space Sciences
Terraces near Flamencos Lagoon in the southeastern Salar de Pajonales (Chile), located at 3,517 m above sea level in the arid Altiplano, host relic gypsum stromatolites and crusts formed under extreme desiccation, intense solar radiation, and episodic ...
C. Tebes-Cayo, C. Tebes-Cayo, C. Demergasso, Ó. Cabestrero, Ó. Cabestrero, G. Chong, D. Carrizo, L. Sánchez-García, V. Parro, K. Warren-Rhodes, Nathalie Cabrol, A. Echeverría-Vega, Eduardo Castro-Nallar, A. Menzies, A. Menzies, M. E. Sanz-Montero   +15 more
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There’s More to Life in Reflected Light: Simulating the Detectability of a Range of Molecules for High-contrast, High-resolution Observations of Nontransiting Terrestrial Exoplanets

The Planetary Science Journal
The upcoming extremely large telescopes (ELTs) will provide the first opportunity to search for signs of habitability and life on nontransiting terrestrial exoplanets using high-contrast, high-resolution instrumentation. However, the suite of atmospheric
Miles H. Currie, Victoria S. Meadows
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A Complex Systems Approach to Exoplanet Atmospheric Chemistry: New Prospects for Ruling Out the Possibility of Alien Life As We Know It

The Planetary Science Journal
The near-term ability to characterize terrestrial exoplanet atmospheres may bring us closer to discovering alien life through atmospheric data. However, remotely detectable candidate biosignature gases are subject to false-positive signals because they ...
Theresa Fisher, Estelle Janin, Sara Imari Walker   +2 more
doaj   +1 more source