Results 11 to 20 of about 3,923 (192)

Assessing the Effect of Large Igneous Provinces on Global Oceanic Redox Conditions Using Non‐traditional Metal Isotopes (Molybdenum, Uranium, Thallium)

open access: yesGeophysical Monograph Series, Page 305-323., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Brian Kendall   +2 more
wiley  

+3 more sources

Electrophysiological Properties from Computations at a Single Voltage: Testing Theory with Stochastic Simulations

open access: yesEntropy, 2021
We use stochastic simulations to investigate the performance of two recently developed methods for calculating the free energy profiles of ion channels and their electrophysiological properties, such as current–voltage dependence and reversal potential ...
Michael A. Wilson, Andrew Pohorille
doaj   +1 more source

Self-Similar Patterns from Abiotic Decarboxylation Metabolism through Chemically Oscillating Reactions: A Prebiotic Model for the Origin of Life

open access: yesLife, 2023
The origin of life must have included an abiotic stage of carbon redox reactions that involved electron transport chains and the production of lifelike patterns.
Dominic Papineau   +2 more
doaj   +1 more source

Reference-guided metagenomics reveals genome-level evidence of potential microbial transmission from the ISS environment to an astronaut's microbiome

open access: yesiScience, 2021
Summary: Monitoring microbial communities aboard the International Space Station (ISS) is essential to maintaining astronaut health and the integrity of life-support systems.
Michael D. Lee   +5 more
doaj   +1 more source

Astrobiology in Space: A Comprehensive Look at the Solar System

open access: yesLife, 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

Adaptations of endolithic communities to abrupt environmental changes in a hyper-arid desert

open access: yesScientific 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

The Peak Absorbance Wavelength of Photosynthetic Pigments Around Other Stars From Spectral Optimization

open access: yesFrontiers 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

open access: yesResources, 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]

open access: yesPulse, 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  

“Freezing” Thermophiles: From One Temperature Extreme to Another

open access: yesMicroorganisms, 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   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy