Results 61 to 70 of about 7,007 (208)

Energy-ordered resource stratification as an agnostic signature of life

Nature Communications
The search for extraterrestrial life hinges on identifying biosignatures, often focusing on gaseous metabolic byproducts as indicators. However, most such biosignatures require assuming specific metabolic processes.
Akshit Goyal, Mikhail Tikhonov
doaj   +1 more source

Time‐Efficient Interleaved Spin Density‐Weighted and Inversion Recovery 23Na MRI of the Human Calf Muscle at 7 T

Magnetic Resonance in Medicine, Volume 96, Issue 6, Page 2675-2684, December 2026.
ABSTRACT Purpose Spin density‐weighted (SDW) and inversion recovery (IR) 23Na MRI provide different sodium contrasts with complementary information. Therefore, the aim was to develop a time‐efficient sequence scheme capable of providing both contrasts by acquiring SDW and IR 23Na MRI data within a single sequence without additional measurement time ...
Tobias Wilferth, Fiona Meyer, Jordan M. Höhn, Michael Uder, Armin M. Nagel   +4 more
wiley   +1 more source

Impact Crater Hydrothermal Systems Support Rapid Microbial Enrichment and Diverse Metabolic Potential

Geobiology, Volume 24, Issue 6, November/December 2026.
ABSTRACT Impact crater hydrothermal systems, formed after asteroid and comet impacts, have been proposed as promising habitats for life on early Earth and as key targets in the search for life on planetary bodies such as Mars, since they provide liquid water and active geochemical turnover.
Sabrina M. C. Hardy, Emily J. Aguilar‐Pine, Sean Gulick, Alaa Ahmad, Brett J. Baker, Nathalie Scott, Georgina Aitolo, Naomi Felton, Charles S. Cockell   +8 more
wiley   +1 more source

Using retinal electrophysiology toward precision psychiatry

European Psychiatry, 2022
Precision medicine in psychiatry is based on the identification of homogeneous subgroups of patients with the help of biosignatures—sets of biomarkers—in order to enhance diagnosis, stratification of patients, prognosis, evaluation, and prediction of ...
Thomas Schwitzer, Marion Leboyer, Vincent Laprévote, Valérie Louis Dorr, Raymund Schwan   +4 more
doaj   +1 more source

A Radio Science Experiment for Dragonfly to Investigate Titan's Rotation and Interior Structure

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract NASA's mission Dragonfly to Titan is scheduled for launch in 2028 with arrival in 2034 to study Titan's prebiotic chemistry and habitability. We propose a radio science experiment for Dragonfly, in which radiometric tracking of the rotorcraft from the Deep Space Network, already baselined for communications and navigation, is used as a ...
Flavio Petricca, Dustin Buccino
wiley   +1 more source

Microbes from ambient-pressure analogues offer insights into possible life in Europa’s high-pressure subsurface ocean

Frontiers in Microbiology
Under its thick ice layer, Europa contains a shielded liquid water ocean where habitable conditions may exist. To effectively assess the habitability of this environment and the implications on putative biosignature formation, it is essential to ...
Alvaro del Moral, Dominic Siggs, Michael C. Macey, Mark G. Fox-Powell, Victoria K. Pearson, Karen Olsson-Francis   +5 more
doaj   +1 more source

T1‐weighting in Steady‐State FLASH MRI–Diffusion Is Not Only Supportive but Mandatory for the Contrast

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1789-1797, October 2026.
ABSTRACT Purpose FLASH imaging is widely assumed to produce a T1‐weighted steady‐state contrast using RF‐ and gradient‐spoiling. We observed substantial overestimation of CSF signals in simulations, when diffusion was neglected and realistic proton density was applied.
Simon Weinmüller, Deepak Charles Chellapandian, Jonathan Endres, Jochen Leupold, Florian Gritsch, Fabian Wagner, Rainer Schneider, Moritz Zaiss   +7 more
wiley   +1 more source

Biosignatures Search in Habitable Planets

Galaxies, 2019
The search for life has had a new enthusiastic restart in the last two decades thanks to the large number of new worlds discovered. The about 4100 exoplanets found so far, show a large diversity of planets, from hot giants to rocky planets orbiting small
Riccardo Claudi, Eleonora Alei
doaj   +1 more source

Quantitative Susceptibility Mapping of Kidney Stones: An Ex Vivo MRI Phantom Study

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1846-1859, October 2026.
ABSTRACT Purpose To visualize and characterize the five most common kidney stone types based on their magnetic susceptibilities in MRI using QSM. Methods Three water‐based agar phantoms were constructed, containing a total of 53 ex vivo kidney stones of varying types and sizes.
Lion H. Mücke, Frederik B. Laun, Ruben de Figueiredo Cardoso, Guillaume Flé, Jennifer Lorenz, Alexander Fichte, Michael Uder, Nadine Bayerl, Jannis Hanspach   +8 more
wiley   +1 more source

Detecting signs of life in biotic–abiotic mixtures using pyrolysis–gas chromatography–mass spectrometry and machine learning

Frontiers in Astronomy and Space Sciences
Biosignature detection is at the forefront of modern astrobiology and paleobiology research. Previous studies have demonstrated that machine learning models trained on data from pyrolysis–gas chromatography–mass spectrometry (py–GC–MS) can distinguish ...
Emersyn Slaughter, Emersyn Slaughter, Emersyn Slaughter, Grethe Hystad, George Cody, Anirudh Prabhu, H. James Cleaves, H. James Cleaves, Robert M. Hazen, Michael L. Wong, Michael L. Wong   +10 more
doaj   +1 more source