Results 61 to 70 of about 5,545 (213)

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

Magnetic Resonance in Medicine, EarlyView.
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

The Oxygen Release Instrument: Space Mission Reactive Oxygen Species Measurements for Habitability Characterization, Biosignature Preservation Potential Assessment, and Evaluation of Human Health Hazards

Life, 2019
We describe the design of an instrument, the OxR (for Oxygen Release), for the enzymatically specific and non-enzymatic detection and quantification of the reactive oxidant species (ROS), superoxide radicals (O2•−), and peroxides (O22−,
Christos D. Georgiou, Christopher P. McKay, Richard C. Quinn, Electra Kalaitzopoulou, Polyxeni Papadea, Marianna Skipitari   +5 more
doaj   +1 more source

Detectability of biosignatures on LHS 1140 b [PDF]

, 2021
Context. Terrestrial extrasolar planets around low-mass stars are prime targets when searching for atmospheric biosignatures with current and near-future telescopes.
Mareike Godolt, Heike Rauer, Scheucher, Markus, John Lee Grenfell, Grenfell, John Lee, Rauer, Heike, Fabian Wunderlich, Godolt, Mareike, Markus Scheucher, Franz Schreier, Clara Sousa-Silva, Sousa-Silva, Clara, Schreier, Franz, Wunderlich, Fabian   +13 more
core   +1 more source

Zero‐Shot Self‐Supervised Learning of Single Breath‐Hold Magnetic Resonance Cholangiopancreatography (MRCP) Reconstruction

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To investigate the feasibility of zero‐shot self‐supervised learning reconstruction for reducing breath‐hold times in magnetic resonance cholangiopancreatography (MRCP). Methods Breath‐hold MRCP was acquired from 11 healthy volunteers on 3T scanners using an incoherent k‐space sampling pattern, leading to a 14‐s acquisition time and an
Jinho Kim, Marcel Dominik Nickel, Florian Knoll   +2 more
wiley   +1 more source

Exploring Fingerprints of the Extreme Thermoacidophile Metallosphaera sedula Grown on Synthetic Martian Regolith Materials as the Sole Energy Sources

Frontiers in Microbiology, 2017
The biology of metal transforming microorganisms is of a fundamental and applied importance for our understanding of past and present biogeochemical processes on Earth and in the Universe.
Denise Kölbl, Marc Pignitter, Veronika Somoza, Mario P. Schimak, Oliver Strbak, Amir Blazevic, Tetyana Milojevic   +6 more
doaj   +1 more source

Biogenic Metal Nanoparticles: A New Approach to Detect Life on Mars?

Life, 2020
Metal nanoparticles (MNPs) have been extensively studied. They can be produced via different methods (physical, chemical, or biogenic), but biogenic synthesis has become more relevant, mainly for being referred by many as eco-friendly and more ...
Marta Filipa Simões, Cristiane Angélica Ottoni, André Antunes   +2 more
doaj   +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

Microbial biosignatures in ancient deep‐sea hydrothermal sulfides

, 2022
Deep‐sea hydrothermal systems provide ideal conditions for prebiotic reactions and ancient metabolic pathways and, therefore, might have played a pivotal role in the emergence of life.
Kappler, Andreas, Duda, Jan‐Peter, Mansor, Muammar, Kappler, Andreas; 2 Geomicrobiology, Department of Geosciences Tübingen University Tübingen Germany, Duda, Jan‐Peter; 1 Sedimentology and Organic Geochemistry, Department of Geosciences Tübingen University Tübingen Germany, Runge, Eric Alexander, Mansor, Muammar; 2 Geomicrobiology, Department of Geosciences Tübingen University Tübingen Germany   +6 more
core   +1 more source

The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review

Journal of Field Robotics, EarlyView.
ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton, Daniel Mitchell, Jamie Blanche, Euan McGookin, David Flynn   +4 more
wiley   +1 more source

Fat/Water Separation at 7 T Using a 3D Radial Sequence With Quasi‐Continuous Echo Times

Magnetic Resonance in Medicine, Volume 96, Issue 1, Page 96-108, July 2026.
ABSTRACT Purpose To achieve a reliable fat/water separation (FWS) at 7 T using a new 3D radial sequence and reconstruction workflow with quasi‐continuous TE sampling. Methods A 3D radial density‐adapted sequence with quasi‐continuous TE sampling was developed for a 7 T whole‐body MRI system.
Matthias Rohe, Katharina Tkotz, Armin M. Nagel, Stefan Sommer, Max Brockmüller, Florian Knoll, Michael Uder, Nico Egger, Frederik B. Laun, Tobias Wilferth   +9 more
wiley   +1 more source