Results 51 to 60 of about 2,858 (221)

Evidence for Trace Gas Metabolism and Widespread Antibiotic Synthesis in an Abiotically Driven, Antarctic Soil Ecosystem

Environmental Microbiology Reports, Volume 17, Issue 6, December 2025.
We analysed bacterial diversity in 18 shotgun metagenomes from a model soil ecosystem in Antarctica using the VEBA metagenome pipeline. We recovered 701 medium‐to‐high quality MAGs and found that these bacteria metabolise trace gases, produce potentially novel antibiotics and employ extremotolerance phenotypes to survive the extreme Antarctic soil ...
A. R. Thompson, B. J. Adams, I. D. Hogg, S. Yooseph   +3 more
wiley   +1 more source

L’exobiologie, l’imaginaire et le symbolique

Cahiers François Viète, 2003
This text puts forward the idea that the commentaries in natural language that necessarily accompany the experimental activities of exobiology (laboratory experiments, space missions, astronomical observations, etc.) inevitably belong to the novel.
Jean Schneider
doaj   +1 more source

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest the problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

Emerging Priorities for Microbiome Research

Frontiers in Microbiology, 2020
Microbiome research has increased dramatically in recent years, driven by advances in technology and significant reductions in the cost of analysis. Such research has unlocked a wealth of data, which has yielded tremendous insight into the nature of the ...
Chad M. Cullen, Kawalpreet K. Aneja, Sinem Beyhan, Clara E. Cho, Stephen Woloszynek, Stephen Woloszynek, Matteo Convertino, Sophie J. McCoy, Yanyan Zhang, Matthew Z. Anderson, Matthew Z. Anderson, David Alvarez-Ponce, Ekaterina Smirnova, Lisa Karstens, Lisa Karstens, Pieter C. Dorrestein, Hongzhe Li, Ananya Sen Gupta, Kevin Cheung, Jennifer Gloeckner Powers, Zhengqiao Zhao, Gail L. Rosen, Gail L. Rosen   +22 more
doaj   +1 more source

PCA‐Based Peak Feature Selection for Classification of Spectroscopic Datasets

Journal of Chemometrics, Volume 39, Issue 11, November 2025.
ABSTRACT Reducing feature dimensionality in spectroscopic data is crucial for efficient analysis and classification. Using all available features for classification typically results in an unacceptably high runtime and poor accuracy. Popular feature extraction methods, such as principal component analysis (PCA), linear discriminant analysis (LDA), and ...
Ingo Schmitt, Kay Sowoidnich, Tapashi Gosswami, Bernd Sumpf, Martin Maiwald, Matthias Wolff   +5 more
wiley   +1 more source

A History of the Extraterrestrial Life Debate

Zygon, 1997
From antiquity to the present, humans have debated whether intelligent life exists elsewhere in the universe. This presentation will survey this debate, examining the roles played in it by science, religion, philosophy, and other areas of human learning.
doaj   +2 more sources

Maximizing Scientific Exploitation of Raman Spectroscopy With A.C.M.E. (Atmospheric Chamber for Measurements in Environment)

Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1394-1403, November 2025.
Simulated planetary gas detection using the A.C.M.E. chamber and a novel hollow‐core fiber Raman sensor. Controlled atmospheric mixtures were used to evaluate the sensor’s performance, demonstrating its capability to detect gases such as CO₂, O₂, and N₂. The results support the applicability of the HCF‐based Raman sensor in future planetary exploration
I. Reyes‐Rodríguez, S. Julve‐Gonzalez, M. Veneranda, J. A. Manrique, A. Sanz‐Arranz, M. Mayoral‐Yagüe, S. Jiménez‐Blázquez, L. Asenjo‐Estévez, E. Charro‐Huerga, J. Delgado‐Iglesias, E. A. Lalla, B. Barrios‐Areinamo, F. Rull, G. Lopez‐Reyes   +13 more
wiley   +1 more source

About the presence of arsenic in prebiotic species

BIO Web of Conferences, 2014
The recent publication that some bacteria could use arsenic instead of phosphorus for building their DNA triggered a large controversy in the astro/exobiology community. Most comments claim that such a substitution is not possible.
Ellinger Y., Toulouze M., Pilmé J., Pauzat F.   +3 more
doaj   +1 more source

Determine the Elemental Composition of Minerals From Complex Solid‐Solution Series by Raman Spectroscopy: Implications for Mars Exploration Missions

Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1404-1417, November 2025.
This study presents a hierarchical Raman‐based classification model for determining the elemental composition of garnets within complex solid‐solution systems. The workflow combines spectral preprocessing, dimensionality reduction, and two‐level classification: first distinguishing between pyralspite and ugrandite groups, and then classifying ...
Sofia Julve‐Gonzalez, Jose Antonio Manrique, Marco Veneranda, Pilar Renedo, Paula Xiaozhen Vega, Iván Reyes‐Rodríguez, María Mayoral, Sergio Jiménez, Lidia Asenjo, Aurelio Sanz‐Arranz, Elena Charro Huerga, Jaime Delgado Iglesias, Olga Prieto‐Ballesteros, Andoni Moral, Emmanuel Alexis Lalla, Belen Barrios‐Areinamo, Fernando Rull, Guillermo Lopez‐Reyes   +17 more
wiley   +1 more source

Comparative Dynamics Enables Discovery of Embedded Bacterial Ferredoxin Domains in Large Redox Enzymes

Proteins: Structure, Function, and Bioinformatics, Volume 93, Issue 11, Page 1973-1987, November 2025.
ABSTRACT Bacterial ferredoxins are small iron–sulfur binding proteins that function as soluble electron shuttles between redox enzymes in the cell. Their simple 2×(β–α–β) fold, central metabolic function, and ubiquity across all kingdoms of life have led to the proposal that ferredoxins were likely among the earliest proteins.
Jan A. Siess, Vikas Nanda
wiley   +1 more source