Results 31 to 40 of about 3,089 (177)

Biosignature hide and seek [PDF]

Nature Astronomy, 2018
A new model predicts locations on the surface of radiation-blasted Europa, the ocean moon of Jupiter, where biochemical signatures of life emergent from the subsurface ocean might survive long enough for detection on the moon's changing surface.
openaire   +2 more sources

Exoplanet Biosignatures: Future Directions [PDF]

Astrobiology, 2018
125 pages (double spaced), 12 figures; The paper is the fourth in a series of 5 review manuscripts of the NExSS Exoplanet Biosignatures Workshop.
Walker, Sara I., Bains, William, Cronin, Leroy, DasSarma, Shiladitya, Danielache, Sebastian, Domagal-Goldman, Shawn, Kacar, Betul, Kiang, Nancy Y., Lenardic, Adrian, Reinhard, Christopher T., Moore, William, Schwieterman, Edward W., Shkolnik, Evgenya L., Smith, Harrison B.   +13 more
openaire   +9 more sources

Discriminating between extinct and extant life detection: implications for future Mars missions

Frontiers in Astronomy and Space Sciences
The search for biosignatures on Mars has been a high priority for astrobiology. The approach to detecting putative biosignatures has largely been focused on chemical analyses targeting predominantly extinct life.
Katherine A. Dzurilla, Bronwyn L. Teece
doaj   +1 more source

Correlation Network Analysis for Amino Acid Identification in Soil Samples With the ORIGIN Space-Prototype Instrument

Frontiers in Astronomy and Space Sciences, 2022
The detection of biomolecules on Solar System bodies can help us to understand how life emerged on Earth and how life may be distributed in our Solar System.
Loraine Schwander, Niels F.W. Ligterink, Kristina A. Kipfer, Rustam A. Lukmanov, Valentine Grimaudo, Marek Tulej, Coenraad P. de Koning, Peter Keresztes Schmidt, Salome Gruchola, Nikita J. Boeren, Nikita J. Boeren, Pascale Ehrenfreund, Pascale Ehrenfreund, Peter Wurz, Peter Wurz, Andreas Riedo, Andreas Riedo   +16 more
doaj   +1 more source

Microbiome and aging: Trajectories of microbiome age across human ecosystems and their systemic effects

iMeta, EarlyView.
Microbiome age (MA) has emerged as an innovative biomarker of biological aging, reflecting host aging trajectories through dynamic alterations in microbial composition, function, and host–microbe interactions across multiple body ecosystems. Diverse computational strategies—including traditional machine learning, deep learning, and multi‐omics ...
Zhexin Ni, Jiaojiao Xie, Zhichun Zhang, Keming Zhang, Jie Ding, Mingyang Chang, Ying Su, Yunan Zhang, Mingfei Yao, Chengyuan Wang, Yan Yan, Wenjie Fang, Hainv Gao, Xuecong Tian, Yangshuo Li, Xinlin Zhu, Wen Zhang, Wanqing Liao, Gaoyuan Xu, Guojing Chen, Xiaoyi Lv, Chaoqin Yu, Weihua Pan, Vadim Molodtsov, Lanjuan Li, Yue Gao, Wei Zhou   +26 more
wiley   +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

A Deep Nonlinear Subspace Modeling and Reconstruction for Diffusion‐Weighted Imaging Using Denoising Auto‐Encoder

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To present a novel, nonlinear subspace modeling and joint k–q‐space reconstruction technique for high‐resolution, multi‐band, multi‐shell diffusion‐weighted imaging (DWI). Methods High b‐value (> 1000 s/mm2), high resolution DWI has the drawback of generally low signal‐to‐noise ratios (SNRs).
Julius Glaser, Zhengguo Tan, Annika Hofmann, Frederik Bernd Laun, Florian Knoll   +4 more
wiley   +1 more source

Exoplanet biosignatures

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

Trace Element Concentrations Associated with Mid-Paleozoic Microfossils as Biosignatures to Aid in the Search for Life

Life, 2021
Identifying microbial fossils in the rock record is a difficult task because they are often simple in morphology and can be mimicked by non-biological structures.
Andrew Gangidine, Malcolm R. Walter, Jeff R. Havig, Clive Jones, Daniel M. Sturmer, Andrew D. Czaja   +5 more
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, EarlyView.
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