Results 21 to 30 of about 11,414 (233)
Taphonomy of Biosignatures in Microbial Mats on Little Ambergris Cay, Turks and Caicos Islands
Frontiers in Earth Science, 2020 Microbial mats are taxonomically and metabolically diverse microbial ecosystems, with a characteristic layering that reflects vertical gradients in light and oxygen availability.
Maya L. Gomes +9 more
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Toward a Biosignature for Suicide [PDF]
American Journal of Psychiatry, 2014 Suicide, a major cause of death worldwide, has distinct biological underpinnings. The authors review and synthesize the research literature on biomarkers of suicide, with the aim of using the findings of these studies to develop a coherent model for the biological diathesis for suicide.The authors examined studies covering a large range of ...
J. John Mann +6 more
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Ratiometric glucose sensing based on fluorescent oxygen films and glucose oxidase
Sensing and Bio-Sensing Research, 2017 A new two-layer sensor film was constructed for sensing glucose based on glucose oxidase and oxygen sensing material. The first layer of film containing the oxygen sensor and intra-reference material was polymerized, then the second layer of glucose ...
Fengyu Su +5 more
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Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment [PDF]
Astrobiology, 2018 55 pages. The paper is the second in a series of 5 review manuscripts of the NExSS Exoplanet Biosignatures Workshop.
Karl R. Stapelfeldt +25 more
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Formalising the Pathways to Life Using Assembly Spaces
Entropy, 2022 Assembly theory (referred to in prior works as pathway assembly) has been developed to explore the extrinsic information required to distinguish a given object from a random ensemble. In prior work, we explored the key concepts relating to deconstructing
Stuart M. Marshall +4 more
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SEMIOTICS OF BIOSIGNATURES [PDF]
Southern Semiotic Review, 2018 This article examines the interpretation of biosignatures, the signs of life that could bedetected in outer space. In astrobiology biosignatures could be of various kinds, fossils, molecules, traces, artefacts, structures, electromagnetic waves, etc.
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Graphitic Carbons and Biosignatures [PDF]
Elements, 2014 The unambiguous identification of graphitic carbons as remains of life in ancient rocks is challenging because fossilized biogenic molecules are inevitably altered and degraded during diagenesis and metamorphism of the host rocks. Yet, recent studies have highlighted the possible preservation of biosignatures carried by some of the oldest graphitic ...
S. Bernard, D. Papineau
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Ammonia and Phosphine in the Clouds of Venus as Potentially Biological Anomalies
Aerospace, 2022 We are of the opinion that several anomalies in the atmosphere of Venus provide evidence of yet-unknown processes and systems that are out of equilibrium.
Carol E. Cleland, Paul B. Rimmer
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Metalliferous Biosignatures for Deep Subsurface Microbial Activity [PDF]
, 2015 Acknowledgments We thank the British Geological Survey (BGS) for the provision of samples and the Science & Technology Facilities Council (STFC) grant (ST/L001233/1) for PhD funding which aided this project.
Bowden, Stephen +3 more
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Habitability and Biosignatures of Hycean Worlds [PDF]
The Astrophysical Journal, 2021 Abstract We investigate a new class of habitable planets composed of water-rich interiors with massive oceans underlying H2-rich atmospheres, referred to here as Hycean worlds. With densities between those of rocky super-Earths and more extended mini-Neptunes, Hycean planets can be optimal candidates in the search for exoplanetary ...
Madhusudhan, N +2 more
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