Results 51 to 60 of about 7,007 (208)
Detectability of Surface Biosignatures for Directly Imaged Rocky Exoplanets [PDF]
Modeling the detection of life has never been more opportune. With next-generation space telescopes, such as the currently developing Habitable Worlds Observatory (HWO) concept, we will begin to characterize rocky exoplanets potentially similar to Earth.
Borges, Schuyler R. +2 more
core +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Chemical exchange saturation transfer (CEST) MRI offers unique metabolic insights for imaging of cancer, stroke, or neurodegeneration. However, the rapid expansion of CEST preparation schemes and evaluation techniques creates a bottleneck; novel methods often remain complex prototypes requiring offline processing, preventing clinical ...
Martin Freudensprung +9 more
wiley +1 more source
Increased Stability in Carbon Isotope Records Reflects Emerging Complexity of the Biosphere
Frontiers in Earth Science, 2019 Preference for certain stable isotopes (isotope fractionation) during enzyme-mediated reactions is a universal aspect of life. For instance, carbon isotopes are fractionated during anabolic (e.g., photosynthate production) and catabolic (e.g ...
Martin Schobben, Bas van de Schootbrugge
doaj +1 more source
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
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To evaluate the repeatability of an extended multiparametric 7 T MRI protocol for voxel‐wise tissue characterization combining morphological, CEST, QSM, QTI, and Sodium contrasts. Methods A repeatability study was performed in 12 volunteers without diagnosed neurological disease on a 7 T MRI system, using a comprehensive acquisition ...
Annika Hofmann +30 more
wiley +1 more source
Frontiers in Earth Science, 2015 Microbial iron oxyhydroxides are common deposits in natural waters, recent sediments and mine drainage systems and often contain significant accumulations of trace and rare earth elements (TREE). TREE patterns are widely used to characterize minerals and
Christine eHeim +7 more
doaj +1 more source
Life on the edge: Using planetary context to enhance biosignatures and avoid false positives [PDF]
We use a probability theory framework to discuss the search for biosignatures. This perspective allows us to analyse the potential for different biosignatures to provide convincing evidence of extraterrestrial life and to formalise frameworks for ...
R Arthur (13620667) +2 more
core +3 more sources
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
doaj +1 more source
Astronomy & Geophysics, 2021 Abstract Biosignature science has come a long way in half a century, but its future depends on more interdisciplinary feeback and conceptual innovation.
openaire +1 more source
Infrared Spectroscopic Detection of Biosignatures at Lake Tírez, Spain: Implications for Mars [PDF]
, 2019 The detection of potential biosignatures with mineral matrices is part of a multifaceted approach in the search for life on other planetary bodies. The 2020 ExoMars Rosalind Franklin rover includes within its payload three IR spectrometers in the form of
Barcenilla, Rebeca +10 more
core +1 more source