Results 61 to 70 of about 8,526 (198)
The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets [PDF]
, 1989 Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-concept that ion-neutral chemistry may be important for modelling hydrogen ...
C. Bilger +5 more
core +3 more sources
Chemistry – A European Journal, Accepted Article.Carbenes, these neutral divalent carbon species have emerged as pivotal players in our laboratories. Despite their broad impact, direct characterization of these reactive molecules remains challenging in many cases. This concept article draws on recent literature to explore the strengths and limitations of the most widely used strategies for their ...
Rodolphe Jazzar +2 more
wiley +1 more source
Astrochemistry and Observations [PDF]
, 1997 8 pages, 6 figures in text, From Fourth Cologne-Bonn-Zermatt-Symposium, The Dense Interstellar Matter in ...
openaire +3 more sources
Journal of Nigerian Society of Physical SciencesThe discovery of lupeol, a triterpenoid compound (C30H50O), in the ethyl acetate leaf extract of Justicia secunda (Blood root), has opened doors to extensive research and development opportunities in natural product-based pharmaceuticals.
B. Bako +5 more
doaj +1 more source
Ice Ic without stacking disorder by evacuating hydrogen from hydrogen hydrate
Nature Communications, 2020 Metastable cubic ice has been identified in several conditions relevant to geo and astrochemistry, but was always characterized by stacking disorder. Here the authors synthesize a hydrogen hydrate and degas hydrogen, obtaining pure non-defected cubic ice,
Kazuki Komatsu +7 more
doaj +1 more source
Molecular Precursors of the RNA-World in Space: New Nitriles in the G+0.693−0.027 Molecular Cloud
Frontiers in Astronomy and Space Sciences, 2022 Nitriles play a key role as molecular precursors in prebiotic experiments based on the RNA-world scenario for the origin of life. These chemical compounds could have been partially delivered to the young Earth from extraterrestrial objects, stressing the
Víctor M. Rivilla +15 more
doaj +1 more source
Effects of turbulent dust grain motion to interstellar chemistry
, 2015 Theoretical studies have revealed that dust grains are usually moving fast through the turbulent interstellar gas, which could have significant effects upon interstellar chemistry by modifying grain accretion.
Ge, J. X., He, J. H., Yan, H. R.
core +1 more source
ChemPhysChem, Volume 26, Issue 6, March 15, 2025.The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida +3 more
wiley +1 more source
Solid and Gaseous Methane in IRAS 23385+6053 as Seen with Open JWST Data
The Astrophysical Journal LettersWe present a new description of the 7.7 μ m region towards the high-mass star-forming region IRAS 23385+6053 taken from the open James Webb Space Telescope Mid-Infrared Instrument Medium Resolution Spectrometer data.
Ruslan Nakibov +5 more
doaj +1 more source
Protonation of apolar species: From Cl2H+ to (E)-NCCHCHCNH+ through computational investigations
Frontiers in Astronomy and Space Sciences, 2023 Radioastronomy is a powerful tool for the discovery of molecules in space but it requires molecular species to be polar. The observation of apolar species can be however enabled by protonation, which occurs from reaction with the abundant H3+ ion ...
Silvia Alessandrini +3 more
doaj +1 more source