Results 21 to 30 of about 5,203 (251)
Macromolecular Chemistry and Physics, Volume 223, Issue 23, December 2022., 2022 Polyesters synthesized prebiotically through dehydration synthesis of α‐hydroxy acids can assembly into membraneless microdroplets proposed to be primitive compartment models. Here, in order to more widely probe the conditions amenable to such primitive polyester microdroplet formation, the effects of synthesis temperature and monomer chirality on ...
Rehana Afrin +9 more
wiley +1 more source
Adaptations of endolithic communities to abrupt environmental changes in a hyper-arid desert
Scientific Reports, 2022 The adaptation mechanisms of microbial communities to natural perturbations remain unexplored, particularly in extreme environments. The extremophilic communities of halite (NaCl) nodules from the hyper-arid core of the Atacama Desert are self-sustained ...
Cesar A. Perez-Fernandez +3 more
doaj +1 more source
Astrobiology in Space: A Comprehensive Look at the Solar System
Life, 2023 The field of astrobiology aims to understand the origin of life on Earth and searches for evidence of life beyond our planet. Although there is agreement on some of the requirements for life on Earth, the exact process by which life emerged from ...
Maarten L. De Mol
doaj +1 more source
Mawrth Vallis, Mars: a fascinating place for future in situ exploration [PDF]
Astrobiology volume 20 Issue 2, January 31, 2020, 2021 After the successful landing of the Mars Science Laboratory rover, both NASA and ESA initiated a selection process for potential landing sites for the Mars2020 and ExoMars missions, respectively. Two ellipses located in the Mawrth Vallis region were proposed and evaluated during a series of meetings (3 for Mars2020 mission and 5 for ExoMars).
arxiv +1 more source
Frontiers in Astronomy and Space Sciences, 2021 In the search for life on other planets, the presence of photosynthetic surface vegetation may be detectable from the colors of light it reflects. On the modern Earth, this spectral reflectance is characterized by a steep increase in reflectance between ...
Owen R. Lehmer +5 more
doaj +1 more source
Bacterial Metal Accumulation as a Strategy for Waste Recycling Management
Resources, 2023 Sustainable mechanisms for efficient and circular metal recycling have yet to be uncovered. In this study, the metal recycling potential of seven metal-resistant bacterial species (Deinococcus radiodurans, Deinococcus aerius, Bacillus coagulans ...
Denise Kölbi +6 more
doaj +1 more source
A False Encounter: An Interspecies Martian Tale [PDF]
Pulse, 2021 This project concerns a fictional scenario in which an AI rover encounters an alien life form in the crevices of a Martian rock. The seconds in which this encounter takes place are mysteriously wiped out from the rover’s Pancam metadata. It is speculated
Oscar Salguero
doaj
Spectrally resolved imaging with the solar gravitational lens [PDF]
Phys. Rev. D 106(4), 044059 (2022), 2022 We consider the optical properties of the solar gravitational lens (SGL) treating the Sun as a massive compact body. Using our previously developed wave-optical treatment of the SGL, we convolve it with a thin-lens representing an optical telescope, and estimate the power spectral density and associated photon flux at individual pixel locations on the ...
arxiv +1 more source
Doppler cross-correlation spectroscopy as a path to the detection of Earth-like planets
Comptes Rendus. Physique, 2023 In the middle of the 20th century, a paradigm shift appeared concerning the expected frequency of planetary systems in the galaxy ...a shift induced by the observation of the rotational velocities of low main sequence stars (Struve 1952)!At the same time,
Mayor, Michel
doaj +1 more source
Genomic Features of the Bundle-Forming Heliobacterium Heliophilum fasciatum
Microorganisms, 2022 Eight species of heliobacteria have had their genomes sequenced. However, only two of these genomes have been analyzed in detail, those from the thermophilic Heliomicrobium (Hmi.) modesticaldum and the alkaliphilic Heliorestis (Hrs.) convoluta.
Kelly S. Bender +9 more
doaj +1 more source