Results 41 to 50 of about 32,223 (288)

Biosignatures for Astrobiology

open access: green, 2018
This book aims at providing a brief but broad overview of biosignatures. The topics addressed range from prebiotic signatures in extraterrestrial materials to the signatures characterising extant life as well as fossilised life, biosignatures related to space, and space flight instrumentation to detect biosignatures either in situ or from orbit.
Jorge L. Vago   +2 more
openalex   +3 more sources

Widening Perspectives: The Intellectual and Social Benefits of Astrobiology, Big History, and the Exploration of Space

open access: yesJournal of Big History, 2019
Astrobiology is the field of science devoted to searching for life elsewhere in the Universe. It is inherently interdisciplinary, integrating results from multiple fields of science, and in this respect has strong synergies with ‘big history’.
Ian A. Crawford
doaj   +1 more source

Learning Astrobiology 101 with experiments in Baja California, Mexico [PDF]

open access: yesEPJ Web of Conferences, 2019
We present our experience teaching the subject ‘Astrobiology 101’ (“Introducción a la Astrobiología”, in Spanish), given in the University of Baja California at Ensenada, Mexico, since 2004 up to the present.
Vázquez Roberto, Núñez Patricia G.
doaj   +1 more source

Free Energies of Reaction for Aqueous Glycine Condensation Chemistry at Extreme Temperatures

open access: yesGeophysical Monograph Series, Page 271-283., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Matthew Kroonblawd, Nir Goldman
wiley  

+1 more source

Astrobiological Stoichiometry [PDF]

open access: yesAstrobiology, 2014
Chemical composition affects virtually all aspects of astrobiology, from stellar astrophysics to molecular biology. We present a synopsis of the research results presented at the "Stellar Stoichiometry" Workshop Without Walls hosted at Arizona State University April 11-12, 2013, under the auspices of the NASA Astrobiology Institute.
Patrick A, Young   +12 more
openaire   +3 more sources

Scientific Targets of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments at the Japanese Experiment Module Exposed Facility of the International Space Station.

open access: yesAstrobiology, 2021
The Tanpopo experiment was the first Japanese astrobiology mission on board the Japanese Experiment Module Exposed Facility on the International Space Station (ISS).
A. Yamagishi   +7 more
semanticscholar   +1 more source

The NASA Astrobiology Roadmap [PDF]

open access: yesAstrobiology, 2008
The NASA Astrobiology Roadmap provides guidance for research and technology development across the NASA enterprises that encompass the space, Earth, and biological sciences. The ongoing development of astrobiology roadmaps embodies the contributions of diverse scientists and technologists from government, universities, and private institutions.
Des Marais, David J.   +10 more
openaire   +2 more sources

From Amino Acids to α‐Keto Acids via β‐Elimination and Transamination Initiates a Pathway to Prebiotic Reaction Networks

open access: yesAngewandte Chemie, EarlyView.
A reaction starting from two amino acids, phosphoserine and Gly, reveals a pathway to the α‐keto acid building blocks pyruvate and glyoxylate, key components of a plausible early metabolic system. A one‐pot β‐elimination and transamination sequence also initiates a cascade of protometabolic transformations that provide crucial insights into the ...
Louis M.P. Ter‐Ovanessian   +5 more
wiley   +2 more sources

Current state of athalassohaline deep sea hypersaline anoxic basin (DHAB) research - recommendations for future work and relevance to astrobiology.

open access: yesEnvironmental Microbiology, 2021
Deep sea hypersaline anoxic basins (DHABs) are uniquely stratified polyextreme environments generally found in enclosed seas. These environments select for elusive and widely uncharacterized microbes that may be living below the currently recognized ...
Luke A Fisher   +7 more
semanticscholar   +1 more source

Metagenomic insights into S(0) precipitation in a terrestrial subsurface lithoautotrophic ecosystem

open access: yesFrontiers in Microbiology, 2015
The Frasassi and Acquasanta Terme cave systems in Italy host isolated lithoautotrophic ecosystems characterized by sulfur-oxidizing biofilms with up to 50% S(0) by mass.
Trinity eHamilton   +6 more
doaj   +1 more source

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