Results 11 to 20 of about 10,002 (189)
Exoplanets: Possible Biosignatures [PDF]
Proceedings of Frontier Research in Astrophysics – II — PoS(FRAPWS2016), 2017 The ancestor philosophers' dream of thousands of new worlds is finally realised: about 3500 extrasolar planets have been discovered in the neighborhood of our Sun. Most of them are very different from those we used to know in our Solar System.
Claudi, R.
core +2 more sources
Lethaia, EarlyView., 2021 Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido +4 more
wiley +1 more source
Alternative Methylated Biosignatures. I. Methyl Bromide, a Capstone Biosignature
The Astrophysical Journal, 2022 Abstract The first potential exoplanetary biosignature detections are likely to be ambiguous due to the potential for false positives: abiotic planetary processes that produce observables similar to those anticipated from a global biosphere. Here we propose a class of methylated gases as corroborative “capstone” biosignatures.
Michaela Leung +3 more
openaire +6 more sources
Exoplanet Biosignatures: Future Directions [PDF]
Astrobiology, 2018 125 pages (double spaced), 12 figures; The paper is the fourth in a series of 5 review manuscripts of the NExSS Exoplanet Biosignatures Workshop.
Walker, Sara I. +13 more
openaire +8 more sources
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
doaj +1 more source
PLoS ONE, 2018 Microbial life can leave various traces (or biosignatures) in rocks, including biotic alteration textures, biominerals, enrichments of certain elements, organic molecules, or remnants of DNA.
Andreas Türke +2 more
doaj +1 more source
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
core +1 more source
High-Resolution Diffusion-Weighted Imaging With Self-Gated Self-Supervised Unrolled Reconstruction. [PDF]
Magn Reson MedABSTRACT Purpose High‐resolution diffusion‐weighted imaging (DWI) is clinically demanding. The purpose of this work is to develop an efficient self‐supervised algorithm unrolling technique for submillimeter‐resolution DWI. Methods We developed submillimeter DWI acquisition utilizing multi‐band multi‐shot EPI with diffusion shift encoding.
Tan Z +4 more
europepmc +2 more sources
ATLAST detector needs for direct spectroscopic biosignature characterization in the visible and near-IR [PDF]
, 2015 Are we alone? Answering this ageless question will be a major focus for astrophysics in coming decades. Our tools will include unprecedentedly large UV-Optical-IR space telescopes working with advanced coronagraphs and starshades.
Bolcar, Matthew R. +8 more
core +3 more sources
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
doaj +1 more source