Results 81 to 90 of about 7,007 (208)

3D Architecture of Kodiak Butte as Evidence of Fluvial or Shoal‐Water Environments in Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract The Mars 2020 mission has explored depositional environments recorded in a fan‐shaped deposit on the western side of Jezero crater. Kodiak butte is an isolated outcrop of sedimentary rock ∼1 km south of the western fan scarp and may be an erosional remnant of said fan.
O. A. Kanine, M. P. Lamb, B. L. Ehlmann, J. P. Grotzinger, C. D. Tate   +4 more
wiley   +1 more source

Stable expectation scores of related biosignatures.

, 2014
We list the related biosignatures of the top 5 negative and positive stable interactions shown in Figure 5.
Yashu Liu (506892), Jieping Ye (92797), Han Li (10885), Changshui Zhang (89457), Pinghua Gong (506893)   +4 more
core   +1 more source

The Cell and the Sum of Its Parts: Patterns of Complexity in Biosignatures as Revealed by Deep UV Raman Spectroscopy

Frontiers in Microbiology, 2019
The next NASA-led Mars mission (Mars 2020) will carry a suite of instrumentation dedicated to investigating Martian history and the in situ detection of potential biosignatures. SHERLOC, a deep UV Raman/Fluorescence spectrometer has the ability to detect
Haley M. Sapers, Haley M. Sapers, Haley M. Sapers, Joseph Razzell Hollis, Rohit Bhartia, Luther W. Beegle, Victoria J. Orphan, Jan P. Amend, Jan P. Amend   +8 more
doaj   +1 more source

Photochemical effects of Mars‐like UV irradiation on carboxylic acids in carbonaceous chondrites and expectations for abiotic background organics on Mars

Meteoritics &Planetary Science, Volume 61, Issue 10, Page 2445-2465, October 2026.
Abstract In the search for life on Mars, understanding the origin of preserved organics is critical. Expected sources include exogenous delivery, endogenous synthesis, and potentially life. Environmental processing by ultraviolet (UV) irradiation can alter these organics, obscuring hallmarks of their origin. To deconvolve these effects, we conducted an
D. K. Buckner, J. C. Aponte, A. C. Schuerger, D. I. Foustoukos, F. Seguin, M. B. Wilhelm, G. Cooper, A. J. Williams   +7 more
wiley   +1 more source

Proinflammatory Epstein–Barr Virus Antibody Functions Track with Disease Activity in Multiple Sclerosis

Annals of Neurology, Volume 100, Issue 3, Page 547-558, September 2026.
Objective Epstein–Barr virus (EBV) has been implicated in the pathogenesis of multiple sclerosis (MS). Elevated immunoglobulin G (IgG) titers against EBV nuclear antigen 1 (EBNA1) represent the most consistent serological marker of MS risk, with levels remaining persistently elevated following disease onset.
Malina Behrens, Paula Terroba‐Navajas, Eline A.J. Willemse, Sabine Schädelin, Manuel Comabella, Christian Münz, Gordan Lauc, Yannic Bartsch, Jens Kuhle, Jan D. Lünemann   +9 more
wiley   +1 more source

Extreme Forward Scattering Observed in Disk-averaged Near-infrared Phase Curves of Titan

The Planetary Science Journal
Titan, with its thick and hazy atmosphere, is a key world in our solar system for understanding light scattering processes. NASA’s Cassini mission monitored Titan between 2004 and 2017, where the derived data set includes a large number of whole disk ...
Chase Cooper, Tyler D. Robinson, Jason W. Barnes, L. C. Mayorga, Lily Robinthal   +4 more
doaj   +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

Evaluation of the Expression and Prognosis of Neural‐Related Products Expressed by Cancer‐Derived Mesenchymal Stem Cells With the Characteristics of Neural Stem Cells

Cancer Medicine, Volume 15, Issue 9, September 2026.
ABSTRACT Studies have demonstrated that the nervous system plays an important role in cancer progression. Nevertheless, the effect of mesenchymal stem cells (MSCs) on cancer has yielded conflicting results. In this study, we discovered that cancer‐derived MSCs (CA‐MSCs) not only exhibit the properties of neural stem cells (NSCs) but also express a ...
Liu Yongjun, Pan Zhiwen, Fu Shangui, Zhai Jinjie, Ying Rongbiao, Chen Zhongjian, Chen Wanyuan, Ju Haixing, Ma Dening, Long Dan, Luo Cong, Fu Zhixuan   +11 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

Interpretable Machine Learning Biosignature Detection From Ocean Worlds Analogue CO2 Isotopologue Data

Earth and Space Science
Future missions to icy ocean worlds (OW) such as Europa and Enceladus will evaluate the habitability and potential for biosignatures on these worlds. These missions will benefit from autonomous science and machine learning (ML) methods to process high ...
Lily A. Clough, Victoria DaPoian, Jonathan D. Major, Lauren M. Seyler, Brett A. McKinney, Bethany P. Theiling   +5 more
doaj   +1 more source