Results 71 to 80 of about 5,203 (251)
Microbial Biotechnology, Volume 18, Issue 3, March 2025.In this study, we performed a spaceflight experiment with B. subtilis TD7 strain, and findings showed that spaceflight resulted in slower growth, higher cell density, different morphology, decreased biofilm formation and lipopeptide metabolism. Transcriptomic analysis indicated that these lipopeptide changes were related to the upregulated genes in ...
Wan‐Qi Qin +6 more
wiley +1 more source
Exobiology issues and experiments at a Mars base [PDF]
Research in Exobiology, the study of the origin, evolution, and distribution of life in the universe, may be a major component of the science activities at a Mars Base.
Mckay, Christopher P.
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Geobiology, Volume 23, Issue 2, March/April 2025.ABSTRACT Methanogenic archaea were likely among the earliest organisms to populate the Earth, perhaps contributing to the Archaean greenhouse effect; they are also widely discussed as analogues to any potential life on Mars. However, fossil evidence of archaea has been difficult to identify in the rock record, perhaps because their preservation ...
Sigrid Huld +3 more
wiley +1 more source
Frontiers in Microbiology, 2020 Microorganisms perform countless tasks on Earth and they are expected to be essential for human space exploration. Despite the interest in the responses of bacteria to space conditions, the findings on the effects of microgravity have been contradictory,
Rosa Santomartino +29 more
doaj +1 more source
The 1st Symposium on Chemical Evolution and the Origin and Evolution of Life [PDF]
This symposium provided an opportunity for all NASA Exobiology principal investigators to present their most recent research in a scientific meeting forum.
Devincenzi, D. L., Pleasant, L. G.
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Evaluating Serpentinization as a Source of Phosphite to Microbial Communities in Hydrothermal Vents
Geobiology, Volume 23, Issue 2, March/April 2025.ABSTRACT Previous studies have documented the presence of phosphite, a reduced and highly soluble form of phosphorus, in serpentinites, which has led to the hypothesis that serpentinizing hydrothermal vents could have been an important source of bioavailable phosphorus for early microbial communities in the Archean.
Joanne S. Boden +4 more
wiley +1 more source
Nature Communications, 2020 Rare earth elements are used in electronics, but increase in demand could lead to low supply. Here the authors conduct experiments on the International Space Station and show microbes can extract rare elements from rocks at low gravity, a finding that ...
Charles S. Cockell +30 more
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Square Kilometre Array key science: a progressive retrospective [PDF]
arXiv, 2014 I summarize the science drivers presented at the workshop for Phase I of the Square Kilometre Array: 'Advancing Astrophysics with the Square Kilometre Array'. I build from the historical perspective of the original Key Science programs: 'Science with a Square Kilometre Array', and consider progress in astrophysics since 2004.
arxiv
Descriptions of several instrument concepts that were generated during a workshop entitled, Exobiology Instrument Concepts for a Soviet Mars 94/94 Mission, held at NASA Ames Research Center in 1989 are presented.
Andersen, D. +2 more
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A Potential Mushy Source for the Geysers of Enceladus and Other Icy Satellites
Geophysical Research Letters, Volume 52, Issue 3, 16 February 2025.Abstract Enceladus is a target for astrobiology due to the H2O ${\mathrm{H}}_{2}\mathrm{O}$ plume ejecta measured by the Cassini spacecraft and the inferred subsurface ocean that could be the source of the geysers. Here we explore an alternative where shear heating along tiger stripe fractures produces partial melting in the ice shell and interstitial ...
Colin R. Meyer +8 more
wiley +1 more source