Results 71 to 80 of about 2,118 (196)
Molecular basis of Arginine and Lysine DNA sequence-dependent thermo-stability modulation.
PLoS Computational Biology, 2022 We have used a variety of theoretical and experimental techniques to study the role of four basic amino acids-Arginine, Lysine, Ornithine and L-2,4-Diaminobutyric acid-on the structure, flexibility and sequence-dependent stability of DNA.
Benjamin Martin +7 more
doaj +1 more source
TESS observations of flares and quasi-periodic pulsations from low mass stars and potential impact on exoplanets [PDF]
, 2021 We have performed a search for flares and Quasi-Periodic Pulsations (QPPs) from low mass M dwarf stars using TESS 2 min cadence data. We find seven stars which show evidence of QPPs. Using Fourier and Empirical Mode Decomposition techniques, we confirm the presence of 11 QPPs in these seven stars with a period between 10.2 and 71.9 min, including an ...
arxiv +1 more source
Inference on the Nature and the Mass of Earth's Late Veneer from Noble Metals and Gases [PDF]
, 2001 Noble metals and gases are very sensitive to the late accretion to the Earth of asteroids and comets. We present mass balance arguments based on these elements that indicate that 0.7E22-2.7E22 kg of extraterrestrial bodies struck the Earth after core ...
Allègre +81 more
core +2 more sources
The Martian subsurface as a potential window into the origin of life [PDF]
, 2017 Few traces of Earth's geologic record are preserved from the time of life's emergence, over 3,800 million years ago. Consequently, what little we understand about abiogenesis - the origin of life on Earth - is based primarily on laboratory experiments ...
Chan, Queenie Hoi Shan +6 more
core +2 more sources
A Pilot Survey of an M Dwarf Flare Star with Swift's UV Grism
, 2022 The near-ultraviolet (NUV) spectral region is a useful diagnostic for stellar flare physics and assessing the energy environment of young exoplanets, especially as relates to prebiotic chemistry. We conducted a pilot NUV spectroscopic flare survey of the
Barclay, Thomas +7 more
core +1 more source
Habitability properties of circumbinary planets [PDF]
The Astronomical Journal, 153, 273 (2017), 2017 It is shown that several habitability conditions (in fact, at least seven such conditions) appear to be fulfilled automatically by circumbinary planets of main-sequence stars (CBP-MS), whereas on Earth these conditions are fulfilled only by chance.
arxiv +1 more source
Natural Radioactivity and Chemical Evolution on the Early Earth: Prebiotic Chemistry and Oxygenation
Molecules, 2022 It is generally recognized that the evolution of the early Earth was affected by an external energy source: radiation from the early Sun. The hypothesis about the important role of natural radioactivity, as a source of internal energy in the evolution of
Boris Ershov
doaj +1 more source
The Nature of Stability in Replicating Systems
Entropy, 2011 We review the concept of dynamic kinetic stability, a type of stability associated specifically with replicating entities, and show how it differs from the well-known and established (static) kinetic and thermodynamic stabilities associated with regular ...
Addy Pross, Nathaniel Wagner
doaj +1 more source
, 2012 The evolution of life has been a big enigma despite rapid advancements in the fields of biochemistry, astrobiology, and astrophysics in recent years.
A. Gibbons +46 more
core +1 more source
Angewandte Chemie, Volume 136, Issue 8, February 19, 2024.Alkali‐ and alkaline‐earth‐metal‐promoted Co−Fe bimetallic catalysts on silica can convert CO2 and H2O to crucial metabolites such as formate, acetate, pyruvate as well as hydrocarbons under mild hydrothermal vent conditions. With alkali‐ and alkaline‐earth metals abundant in hydrothermal vents, our study simulates how the geochemical process can fix ...
Youngdong Song +2 more
wiley +2 more sources