Results 101 to 110 of about 7,007 (208)

Centimeter-scale spatial heterogeneity in the distribution of molecular biosignatures

This investigation entails the comparative characterization of molecular biosignatures in subsamples of a single sample from the Green River ...
Michael L Tuite, David Flannery
core   +1 more source

Vertical Transmission of Gut Dysbiosis From Mothers With Gestational Diabetes to Infants

Journal of Diabetes
Background Vertical transmission of microbes from a mother's gut to their offspring plays a crucial role in the genesis of the early life gut microbiome.
Jia Ming Low, Abhishek Gupta, Rachel Toh, Su Lin Lim, Shiao‐Yng Chan, Sanjay Swarup, Le Ye Lee   +6 more
doaj   +1 more source

Enceladus: Biosignatures [PDF]

, 2014
Saturn's moon Enceladus is a new world for Astrobiology. Through the study of Enceladus' plumes new insights into its habitability will be gained. The four core parameters for life include: water, carbon, nitrogen, and energy; all were found in the plume.
Mckay, Chris P., Mancinelli, Rocco L., Davilla, Alfonso   +2 more
core  

Detecting Biosignatures in Complex Molecular Mixtures From Pyrolysis‐Gas Chromatography‐Mass Spectrometry Data Using Machine Learning

Journal of Geophysical Research: Machine Learning and Computation
Understanding how measured molecular signals can distinguish the chemistry of life from the chemistry of the nonliving world is a central focus of astrobiology and paleobiology.
Grethe Hystad, H. James Cleaves II, Collin A. Garmon, Michael L. Wong, Anirudh Prabhu, George D. Cody, Robert M. Hazen   +6 more
doaj   +1 more source

Global to nano-scale relevance of Ca-carbonate biosignatures

, 2013
This paper addresses the recent advances in geobiosciences and nanotechnologies focused on developing the capacity to resolve at very fi ne scale mineral biosignatures and traces of life left behind long after living organisms are ...
CAVALAZZI, BARBARA
core   +1 more source

Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life [PDF]

, 2017
In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitable exoplanets for signatures of life.
Arney, Giada N, Cockell, Charles S, DasSarma, Shiladitya, Hegde, Siddharth, Grenfell, John Lee, Hartnett, Hilairy E, Fisher, Theresa M, Kiang, Nancy Y, Parenteau, Mary N, Harman, Chester E, Lyons, Timothy W, Olson, Stephanie L, Meadows, Victoria S, Rugheimer, Sarah, Walker, Sara I, Reinhard, Christopher T, Schwieterman, Edward W, Hu, Renyu   +17 more
core  

Taphonomy of biosignatures in carbonate nodules from the Mars-analog Qaidam Basin: constraints from microscopic, spectroscopic, and geochemical analyses

Frontiers in Astronomy and Space Sciences
Early diagenetic nodules with low permeable and weather-resistant structures are considered to be favorable for biosignature preservation. Numerous nodular structures forming in neutral-to-alkaline and saline diagenetic fluids were previously identified ...
Yan Chen, Zongjun Yin, Wei Lin
doaj   +1 more source

Soil Systems as Astrobiological Models: Microbial Communities, Environmental Stressors, and Planetary Analogues

Soil Systems
Soils are complex, heterogeneous systems that link terrestrial ecology and astrobiology. Microbial persistence in these systems reflects not only intrinsic cellular resistance but also interactions among organisms, mineral components, organic matter, and
Vladimir Cheptsov, Andrey Belov, Ivan Kozlov   +2 more
doaj   +1 more source

Correlative X‐Ray and Neutron Tomography of Microbial Biosignatures: Perspectives for Mars Sample Return

Earth and Space Science
Mars Sample Return (MSR) is the next major frontier in Mars exploration, through which advanced laboratory instrumentation will be used to study Martian samples and answer key questions surrounding Mars' planetary evolution and astrobiology.
Sylvia Olewinski, Imran A. Rahman, Anna Fedrigo, Peta A. Hayes, Caroline L. Smith, Keyron Hickman‐Lewis   +5 more
doaj   +1 more source

Permeability, Pore Throat Size, Meteoric Influx, and Biomass Control the Depth‐Distribution of Microbial Biosignatures in Sedimentary Basin Fluids

AGU Advances
The few studies of modern or ancient subsurface microbial communities beyond ∼100 m depth limit our view into the vast and complex deep terrestrial biosphere.
Jennifer McIntosh, Henrik Drake, Ji‐Hyun Kim, Anna Martini, Magdalena Osburn, Meera Shah, Bradley Stevenson, Grant Ferguson   +7 more
doaj   +1 more source