Results 21 to 30 of about 2,729 (209)

Présentation. Exobiologie, aspects historiques et épistémologiques

Cahiers François Viète, 2003
The definition of exobiology – the study of the origins, evolution and distribution of life in the universe, as well as of related structures and processes – raises the problem of the link between current and past studies on the origins of terrestrial ...
Florence Raulin Cerceau, Stéphane Tirard   +1 more
doaj   +1 more source

A Weakened Immune Response to Synthetic Exo-Peptides Predicts a Potential Biosecurity Risk in the Retrieval of Exo-Microorganisms

Microorganisms, 2020
The discovery of liquid water at several locations in the solar system raises the possibility that microbial life may have evolved outside Earth and as such could be accidently introduced into the Earth’s ecosystem.
Katja Schaefer, Ivy M. Dambuza, Sergio Dall’Angelo, Raif Yuecel, Marcel Jaspars, Laurent Trembleau, Matteo Zanda, Gordon D. Brown, Mihai G. Netea, Neil A. R. Gow   +9 more
doaj   +1 more source

“Freezing” Thermophiles: From One Temperature Extreme to Another

Microorganisms, 2022
New detections of thermophiles in psychrobiotic (i.e., bearing cold-tolerant life forms) marine and terrestrial habitats including Arctic marine sediments, Antarctic accretion ice, permafrost, and elsewhere are continually being reported.
Tetyana Milojevic, Margaret Anne Cramm, Casey R. J. Hubert, Frances Westall   +3 more
doaj   +1 more source

Stephen Hawking’s Warning on Contacting Aliens: A Physics Perspective on the Intelligence Trap [PDF]

Journal of Biomedical Physics and Engineering
The search for extraterrestrial intelligence is a fascinating and important endeavor, but it raises significant ethical and safety concerns. In the search for extraterrestrial intelligence, scientists use knowledge of physics to identify potential ...
Seyed Mohammad Javad Mortazavi, Joseph John Bevelacqua, Seyed Alireza Mortazavi, Payman Rafiepour, James S Welsh   +4 more
doaj   +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, Michael T. Madigan, Kyleigh L. Williamson, Marisa H. Mayer, Mary N. Parenteau, Linda L. Jahnke, Paula V. Welander, Sophia A. Sanguedolce, Abigail C. Brown, W. Matthew Sattley   +9 more
doaj   +1 more source

Ladderpath Approach: How Tinkering and Reuse Increase Complexity and Information

Entropy, 2022
The notion of information and complexity are important concepts in many scientific fields such as molecular biology, evolutionary theory and exobiology. Many measures of these quantities are either difficult to compute, rely on the statistical notion of ...
Yu Liu, Zengru Di, Philip Gerlee
doaj   +1 more source

Community ecology and functional potential of bacteria, archaea, eukarya and viruses in Guerrero Negro microbial mat

Scientific Reports
In this study, the microbial ecology, potential environmental adaptive mechanisms, and the potential evolutionary interlinking of genes between bacterial, archaeal and viral lineages in Guerrero Negro (GN) microbial mat were investigated using ...
P. Maza-Márquez, M. D. Lee, B. M. Bebout   +2 more
doaj   +1 more source

Early Technology Readiness Level (TRL) Development of the Microfluidic Inorganic Conductivity Detector for Europa and the Solenoid-Based Actuator Assembly for Impact Penetrators

Sensors
This study introduces an innovative in situ lander/impact-penetrator design tailored for Discovery-class missions to Europa, specifically focused on conducting astrobiological analyses.
Chinmayee Govinda Raj, Mohamed Odeh, Cambrie Salyards, Amanda Stockton   +3 more
doaj   +1 more source

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source