Results 31 to 40 of about 4,760 (150)

Atmospheric Seasonality as an Exoplanet Biosignature [PDF]

, 2018
Current investigations of exoplanet biosignatures have focused on static evidence of life, such as the presence of biogenic gases like O2 or CH4.
Kane, Stephen R., Christopher T. Reinhard, Stephanie L. Olson, Victoria S. Meadows, Andy Ridgwell, Lyons, Timothy W., Reinhard, Christopher T., Kane, Stephen R, Lyons, Timothy W, Olson, Stephanie L, Meadows, Victoria S, Ridgwell, Andy, Schwieterman, Edward W., Stephen R. Kane, Meadows, Victoria S., Olson, Stephanie L., Reinhard, Christopher T, Edward W. Schwieterman, Timothy W. Lyons, Schwieterman, Edward W   +19 more
core   +1 more source

Microscale Biosignatures and Abiotic Mineral Authigenesis in Little Hot Creek, California

Frontiers in Microbiology, 2018
Hot spring environments can create physical and chemical gradients favorable for unique microbial life. They can also include authigenic mineral precipitates that may preserve signs of biological activity on Earth and possibly other planets.
Emily A. Kraus, Scott R. Beeler, R. Agustin Mors, James G. Floyd, GeoBiology 2016, Blake W. Stamps, Heather S. Nunn, Bradley S. Stevenson, Hope A. Johnson, Russell S. Shapiro, Sean J. Loyd, John R. Spear, Frank A. Corsetti   +12 more
doaj   +1 more source

The search for habitable planets with biosignature gases framed by a ‘Biosignature Drake Equation’

, 2017
The discovery of thousands of exoplanets in the last two decades has uncovered a wide diversity of planets that are very different from those in our own Solar System. Ideas for how to detect signs of life in the variety of planetary possibilities, by way
Sara Seager
core   +1 more source

An Astrophysical View of Earth-Based Metabolic Biosignature Gases

, 2011
Microbial life on Earth uses a wide range of chemical and energetic resources from diverse habitats. An outcome of this microbial diversity is an extensive and varied list of metabolic byproducts.
Schrenk, Matthew, Seager, Sara, Bains, William   +2 more
core   +1 more source

Application of Cerebrospinal Fluid Host Protein Biosignatures in the Diagnosis of Tuberculous Meningitis in Children from a High Burden Setting

Mediators of Inflammation, 2019
Background. The diagnosis of tuberculous meningitis (TBM) especially in children is challenging. New tests are urgently needed for the diagnosis of the disease, especially in resource-limited settings. Methods.
Charles M. Manyelo, Regan S. Solomons, Candice I. Snyders, Portia M. Manngo, Hygon Mutavhatsindi, Belinda Kriel, Kim Stanley, Gerhard Walzl, Novel N. Chegou   +8 more
doaj   +1 more source

A Modular Hybrid Framework for CEST MRI Development and Clinical Translation Using pTx‐Pulseq Preparation With Open‐ and Closed‐Source Readouts and ONNX Mapping

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, Junaid R. Rajput, Patrick Liebig, Simon Weinmüller, Ludwig Singer, Nikita Vladimirov, Or Perlman, Armin Michael Nagel, Arnd Doerfler, Moritz Zaiss   +9 more
wiley   +1 more source

Immunological biosignature of untreated and treated HIV+ patients under two antiretroviral regimens, according to disease progression.

, 2015
Viral load, CD4+ T cell counts, sCD163, and sCD14 levels were used as progression biomarkers to classify HIV+ patients in patients presenting rapid (upper charts) or slow (lower charts) disease progression.
Maira C. Cacemiro (838838), Olindo A. Martins-Filho (294737), Fabiana A. Zambuzi (838839), Matheus de Souza Gomes (3772336), Milena S. Espíndola (838835), Laurence R. Amaral (838840), Leonardo J. G. Lima (838836), Luana S. Soares (838837), Valdes R. Bollela (838841), Fabiani G. Frantz (247667)   +9 more
core   +1 more source

BIOSIGNATURE GASES IN H₂-DOMINATED ATMOSPHERES ON ROCKY EXOPLANETS [PDF]

, 2013
Super-Earth exoplanets are being discovered with increasing frequency and some will be able to retain stable H2-dominated atmospheres. We study biosignature gases on exoplanets with thin H2 atmospheres and habitable surface temperatures, using a model ...
Seager, Sara, Bains, William, Hu, Renyu
core   +1 more source

Simultaneous characterization of the atmospheres, surfaces, and exomoons of nearby rocky exoplanets

Earth and Planetary Physics, 2018
Atmospheric composition is an important indicator of habitability and life. The presence or absence of a large exomoon around an Earth-size exoplanet could have important consequences for planet climate stability.
WenLiang Cui, JinSu Zhang, Frederic Schmidt, Duo Cui, XiaoMeng Huang, Tong Li, Feng Tian   +6 more
doaj   +1 more source

Toward Brain Biosignature at 7 T—Repeatability of a Multiparametric CEST, QSM, QTI, and Sodium Imaging Protocol

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, Martin Freudensprung, Lion Mücke, Tobias Wilferth, Zijin Yang, Dominik Perrin, Julius Glaser, Katharina Tkotz, Magda Duarte, Simon Weinmüller, Oliver Chaudry, Annemarie Wirth, Angelika Mennecke, Oliver Gödicke, Patrick Liebig, Lena V. Gast, Philipp Ehses, Clemens Stilianu, Rudolf Stollberger, Jannis Hanspach, Alexander German, Jürgen Winkler, Michael Uder, Arnd Doerfler, Sebastian Bickelhaupt, Andreas Maier, Katharina Breininger, Moritz Zaiss, Armin M. Nagel, Frederik B. Laun, Florian Knoll   +30 more
wiley   +1 more source