Results 121 to 130 of about 10,794 (262)

Data-Driven Astrochemistry: One Step Further within the Origin of Life Puzzle

Life, 2018
Astrochemistry, meteoritics and chemical analytics represent a manifold scientific field, including various disciplines. In this review, clarifications on astrochemistry, comet chemistry, laboratory astrophysics and meteoritic research with respect to ...
Alexander Ruf, Louis L. S. d’Hendecourt, Philippe Schmitt-Kopplin   +2 more
doaj   +1 more source

Dark-matter halo mergers as a fertile environment for low-mass Population III star formation

, 2014
While Population III stars are typically thought to be massive, pathways towards lower-mass Pop III stars may exist when the cooling of the gas is particularly enhanced. A possible route is enhanced HD cooling during the merging of dark-matter halos. The
Bovino, S., Grassi, T., Latif, M. A., Schleicher, D. R. G.   +3 more
core   +1 more source

Phenyl Radical Activates Molecular Hydrogen Through Protium and Deuterium Tunneling

Angewandte Chemie International Edition, Volume 63, Issue 51, December 16, 2024.
Activating the strong H2 bond is typically reserved for transition metals, and only a few main group systems can tackle this challenge. Here, we explore a phenyl radical mediated pathway utilizing the photolysis of iodobenzene. The phenyl radical leverages the high C−H bond energy of the forming benzene to drive H2 activation.
Virinder Bhagat, Jan Meisner, Jan Philipp Wagner   +2 more
wiley   +1 more source

Structure-based evaluation of Annona muricata bioactives for anticancer drug discovery: quantum chemical, molecular docking, and ADMET studies

Discover Applied Sciences
Cancer remains a leading cause of mortality worldwide, necessitating the discovery of novel therapeutic agents with improved efficacy and safety profiles.
H. S. Samuel, J. Dennis, D. Alahira, B. Bako, A. M. Abakpa, E. E. Etim, J. P. Shinggu   +6 more
doaj   +1 more source

Warm Cores around Regions of Low-Mass Star Formation

, 2010
Warm cores (or hot corinos) around low-mass protostellar objects show a rich chemistry with strong spatial variations. This chemistry is generally attributed to the sublimation of icy mantles on dust grains initiated by the warming effect of the stellar ...
André, Bergin, Bisschop, Bottinelli, Caux, Cazaux, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Collings, Collings, Collings, David A. Williams, Garrod, Geppert, Hatchell, Herbst, Hollis, Le Teuff, Lepp, Maret, Mark P. Collings, Molinari, Nomura, Rawlings, Sakai, Schöier, Serena Viti, Shu, Tielens, Van Dishoeck, Viti, Wakelam, Watanabe, Zainab Awad   +39 more
core   +1 more source

Astrochemistry in an Ion Storage Ring

Journal of Physics: Conference Series, 2012
Storage ring studies of low energy electron collisions with molecular ions have been carried out for dissociative recombination (DR) of fluorine-bearing molecules. Here we report on work aiming to improve the understanding of astrochemistry involving HF, a possible spectroscopic tracer of interstellar H2.
Steffen Novotny, Dmitri A. Orlov, Wolf D. Geppert, Claude Krantz, Annemieke Petrignani, Michael Lestinsky, Max H. Berg, Dirk Schwalm, Dirk Schwalm, Mathias Hamberg, A. Shornikov, Manfred Grieser, Alexander Wolf, M. B. Mendes, M. Froese, Julia Stützel, O. Novotný, O. Novotný, Daniel Wolf Savin, Florian Grussie, Christian Nordhorn, Henrik Buhr, Henrik Buhr   +22 more
openaire   +4 more sources

The role of ultraviolet photons in circumstellar astrochemistry [PDF]

Chinese Journal of Chemical Physics, 2020
Stars with masses between 1 and 8 solar masses (M⊙) lose large amounts of material in the form of gas and dust in the late stages of stellar evolution, during their Asymptotic Giant Branch (AGB) phase. Such stars supply up to 35% of the dust in the interstellar medium and thus contribute to the material out of which our solar system formed. In addition,
openaire   +5 more sources

Harmonic Scale Factors of Fundamental Transitions for Dispersion‐corrected Quantum Chemical Methods

ChemPhysChem, Volume 25, Issue 23, December 2, 2024.
This study presents two new sets of scaling factors for adjusting theoretical harmonic vibrational spectra computed using dispersion‐corrected density functional theory methods to better match experimental data. The first set (absolute scaling) better aligns with higher frequencies, while the second one (relative scaling) evenly reduces errors across ...
Denis S. Tikhonov, Igor Gordiy, Danila A. Iakovlev, Alisa A. Gorislav, Mikhail A. Kalinin, Sergei A. Nikolenko, Ksenia M. Malaskeevich, Karina Yureva, Nikita A. Matsokin, Melanie Schnell   +9 more
wiley   +1 more source

Infrared Band Strengths and Other Properties of Three Interstellar Compounds—Amorphous Isocyanic Acid, Formaldehyde, and Formic Acid

The Astrophysical Journal
Infrared (IR) spectral features of interstellar and solar system ices have been attributed to solid organic and inorganic compounds for over 50 yr, but in many cases the laboratory IR data needed to fully quantify such work have never been published ...
Reggie L. Hudson, Yukiko Y. Yarnall, Perry A. Gerakines   +2 more
doaj   +1 more source

PREBIOTIC ASTROCHEMISTRY IN THE "THz-GAP" [PDF]

Proceedings of the 2021 International Symposium on Molecular Spectroscopy, 2020
Fundamental biological molecules such as amino acids and sugars have been discovered in meteorites, but none of these species have yet been definitively detected in the interstellar medium (ISM). While both the number of detected interstellar molecules and their chemical complexity continue to increase, understanding of the processes leading to their ...
openaire   +2 more sources