Results 21 to 30 of about 1,324 (249)
Green Processing and Synthesis, 2023 Much effort was taken to elucidate how organic precursors appeared in early Earth, and attention was paid to two impact experiments: hypervelocity impacts by a propellant gun which simulated meteorite collides to Earth forming fatty acids and amino acids
Kugimiya Koichi +4 more
doaj +1 more source
Frontiers in Microbiology, 2023 The demonstration by Ivan Barnes et al. that the serpentinization of fresh Alpine-type ultramafic rocks results in the exhalation of hot alkaline fluids is foundational to the submarine alkaline vent theory (AVT) for life’s emergence to its ‘improbable ...
Michael J. Russell
doaj +1 more source
Serpentinization-Associated Mineral Catalysis of the Protometabolic Formose System
Life, 2023 The formose reaction is a plausible prebiotic chemistry, famed for its production of sugars. In this work, we demonstrate that the Cannizzaro process is the dominant process in the formose reaction under many different conditions, thus necessitating a ...
Arthur Omran +6 more
doaj +1 more source
Constraints on Bend‐Faulting and Mantle Hydration at the Marianas Trench From Seismic Anisotropy
Geophysical Research Letters, 2023 Subduction zones are a key link between the surface water cycle and the solid Earth, as the incoming plate carries pore water and hydrous minerals into the subsurface.
Hannah F. Mark +2 more
doaj +1 more source
Frontiers in Microbiology, 2023 The generation of hydrogen and reduced carbon compounds during serpentinization provides sustained energy for microorganisms on Earth, and possibly on other extraterrestrial bodies (e.g., Mars, icy satellites).
Kaitlin R. Rempfert +7 more
doaj +1 more source
Giant serpentine aneurysms [PDF]
Neurosurgical Focus, 2009 Segal and McLaurin first described giant serpentine aneurysms, based on their distinct angiographic features, in 1977. These lesions are ≥ 25 mm, partially thrombosed aneurysms with a patent, serpiginous vascular channel that courses through the aneurysm.
Lana D, Christiano +3 more
openaire +2 more sources
Frontiers in Microbiology, 2023 The process of serpentinization supports life on Earth and gives rise to the habitability of other worlds in our Solar System. While numerous studies have provided clues to the survival strategies of microbial communities in serpentinizing environments ...
Lauren M. Seyler +9 more
doaj +1 more source
Giant serpentine aneurysm [PDF]
BMJ Case Reports, 2016 A 34-year-old man with a history of seizures presented after a generalised seizure. An MRI of the brain and MR angiogram of the brain (figure 1) were performed, demonstrating a partially thrombosed, giant intracranial aneurysm involving the left anterior cerebral artery (ACA).
Ramesh, Grandhi +3 more
openaire +2 more sources
Geochemistry, Geophysics, GeosystemsSerpentinization, a consequence of water‐rock interaction in mafic and ultramafic rocks, refers to the hydrothermal alteration of olivine and pyroxene with serpentine as the typical product.
Yuzhen Zhang +5 more
doaj +1 more source
Native H2 Exploration in the Western Pyrenean Foothills
Geochemistry, Geophysics, Geosystems, 2021 Native hydrogen (H2) may represent a new carbon free‐energy resource, but to date there is no specific exploration guide to target H2‐fertile geological settings. Here, we present the first soil gas survey specifically designed to explore H2 migration in
Nicolas Lefeuvre +7 more
doaj +1 more source