Results 61 to 70 of about 8,849 (202)

Fossil biomass preserved as graphitic carbon in a late paleoproterozoic banded iron formation metamorphosed at more than 550°C [PDF]

, 2019
Metamorphism is thought to destroy microfossils, partly through devolatilization and graphitization of biogenic organic matter. However, the extent to which there is a loss of molecular, elemental and isotope signatures from biomass during high ...
De Gregorio, BT, Drost, M, Kilcoyne, DA, Marbach, H, Nittler, L, Papineau, D, Sagar, J, Thornton, G, Thorogate, R, Wang, J   +9 more
core   +2 more sources

Network-based integrative multi-omics approach reveals biosignatures specific to COVID-19 disease phases

Frontiers in Molecular Biosciences
BackgroundCOVID-19 disease is characterized by a spectrum of disease phases (mild, moderate, and severe). Each disease phase is marked by changes in omics profiles with corresponding changes in the expression of features (biosignatures).
Francis E. Agamah, Thomas H. A. Ederveen, Michelle Skelton, Darren P. Martin, Emile R. Chimusa, Peter A. C. ’t Hoen   +5 more
doaj   +1 more source

The Cell and the Sum of Its Parts: Patterns of Complexity in Biosignatures as Revealed by Deep UV Raman Spectroscopy

Frontiers in Microbiology, 2019
The next NASA-led Mars mission (Mars 2020) will carry a suite of instrumentation dedicated to investigating Martian history and the in situ detection of potential biosignatures. SHERLOC, a deep UV Raman/Fluorescence spectrometer has the ability to detect
Haley M. Sapers, Haley M. Sapers, Haley M. Sapers, Joseph Razzell Hollis, Rohit Bhartia, Luther W. Beegle, Victoria J. Orphan, Jan P. Amend, Jan P. Amend   +8 more
doaj   +1 more source

Discriminating between extinct and extant life detection: implications for future Mars missions

Frontiers in Astronomy and Space Sciences
The search for biosignatures on Mars has been a high priority for astrobiology. The approach to detecting putative biosignatures has largely been focused on chemical analyses targeting predominantly extinct life.
Katherine A. Dzurilla, Bronwyn L. Teece
doaj   +1 more source

Inferring Chemical Disequilibrium Biosignatures for Proterozoic Earth-Like Exoplanets [PDF]

, 2023
Chemical disequilibrium quantified via available free energy has previously been proposed as a potential biosignature. However, exoplanet biosignature remote sensing work has not yet investigated how observational uncertainties impact the ability to infer a life-generated available free energy.
arxiv   +1 more source

Biosignature hide and seek [PDF]

Nature Astronomy, 2018
A new model predicts locations on the surface of radiation-blasted Europa, the ocean moon of Jupiter, where biochemical signatures of life emergent from the subsurface ocean might survive long enough for detection on the moon's changing surface.
openaire   +3 more sources

Detecting industrial pollution in the atmospheres of earth-like exoplanets

, 2014
Detecting biosignatures, such as molecular oxygen in combination with a reducing gas, in the atmospheres of transiting exoplanets has been a major focus in the search for alien life.
Abad, Gonzalo Gonzalez, Lin, Henry W., Loeb, Abraham   +2 more
core   +1 more source

SPECULOOS exoplanet search and its prototype on TRAPPIST [PDF]

, 2017
One of the most significant goals of modern science is establishing whether life exists around other suns. The most direct path towards its achievement is the detection and atmospheric characterization of terrestrial exoplanets with potentially habitable
A Burrows, A Collier Cameron, A Wolszczan, Adam J. Burgasser, AR Belu, B Goldman, C Hayashi, C Terquem, CH Blake, CP Johnstone, D Deming, D Kubas, E Agol, E Berger, E Bolmont, E Bolmont, E Jehin, EE Mamajek, ET Whelan, Eunkyu Han, GÁ Bakos, IN Reid, IN Reid, J Leconte, J Muzerolle, J Wit de, J Wit de, J. Schneider, JCB Papaloizou, JD Kirkpatrick, JD Kirkpatrick, JE Gizis, JE Owen, JE Owen, JK Barstow, JN Winn, JS Pineda, KL Luhman, KL Luhman, KL Luhman, L Kaltenegger, L Ricci, L Zeng, M Gillon, M Gillon, M Gillon, M Gillon, M Jura, M Mayor, MC Cushing, MJ Holman, MJ Payne, MY He, P Cresswell, P. Figueira, Philip S. Muirhead, PJ Wheatley, PS Muirhead, R Klein, R Luger, R Luger, R Montgomery, RK Kopparapu, RL Akeson, S Ballard, S Jin, S Seager, S Seager, Sergio B. Dieterich, SJ Schmidt, SN Raymond, SS Kumar, SS Kumar, Stanimir A. Metchev, V Bourrier, X Bonfils, Y Alibert, Y Shvartzvald, ZK Berta   +78 more
core   +1 more source

Early evolution of purple retinal pigments on Earth and implications for exoplanet biosignatures

, 2018
We propose that retinal-based phototrophy arose early in the evolution of life on Earth, profoundly impacting the development of photosynthesis and creating implications for the search for life beyond our planet.
DasSarma, Shiladitya, Schwieterman, Edward W.   +1 more
core   +1 more source

Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets [PDF]

, 2019
The current progress in the detection of terrestrial type exoplanets has opened a new avenue in the characterization of exoplanetary atmospheres and in the search for biosignatures of life with the upcoming ground-based and space missions. To specify the
Airapetian, VS, Barnes, R, Cohen, O, Collinson, GA, Danchi, WC, Del Genio, AD, Dong, CF, France, K, Garcia-Sage, K, Glocer, A, Gopalswamy, N, Grenfell, JL, Gronoff, G, Güdel, M, Henning, WG, Herbst, K, Jackman, CH, Jin, M, Johnstone, CP, Kaltenegger, L, Kay, CD, Kobayashi, K, Kuang, W, Li, G, Luhmann, JG, Lynch, BJ, Lüftinger, T, Maehara, H, Mlynczak, MG, Notsu, Y, Osten, RA, Ramirez, RM, Rugheimer, S, Scheucher, M, Schlieder, JE, Shibata, K, Sousa-Silva, C, Stamenković, V, Strangeway, RJ, Usmanov, AV, Vergados, P, Verkhoglyadova, OP, Vidotto, AA, Voytek, M, Way, MJ, Yamashiki, Y, Zank, GP   +46 more
core   +2 more sources