Results 81 to 90 of about 10,794 (262)

ASTROCHEMISTRY OF STAR FORMATION

Odessa Astronomical Publications, 2013
Star formation is one of the key pro­cesses governing the evolution of the Universe. It is ac­companied by significant transformations in the chem­ical composition and the physical state of the inter­stellar medium. Combining observations in infrared and
D. S. Wiebe, O. V. Kochina
doaj   +1 more source

Future Directions in Astrochemistry [PDF]

Proceedings of the International Astronomical Union, 2005
An account of a free-ranging Panel Discussion held during the Symposium.
openaire   +2 more sources

Radioprotective Efficacy of Jujube Aqueous Extract and Arbutin: Synergistic Antioxidant and Anti‐Apoptotic Mechanisms in Radiation Injury

Food Science &Nutrition, Volume 13, Issue 10, October 2025.
JAE demonstrates potent antioxidant activity and protects against radiation‐induced lung injury. Proteomic reveals JAE modulates apoptosis and oxidative stress pathways for radioprotection. JAE demonstrates broad cellular protection against UVC damage in lung and skin cell models.
Liping Wang, Hui Yang, Xuchen Zhou, Yufen Zhao, Long Li, Ning Wang   +5 more
wiley   +1 more source

PRESTALINE: a package for simulation and analysis of molecular spectra of star forming regions

Open Astronomy, 2021
We present the PRESTALINE package, a novel tool to simulate and analyse spectra of star forming objects. PRESTALINE allows for a direct comparison of theoretical models with observations and simplifies an analysis of observed spectra.
Van Looveren Gwenaël, Kochina Olga, Wiebe Dmitry   +2 more
doaj   +1 more source

A hybrid moment equation approach to gas-grain chemical modeling [PDF]

, 2011
[Context] The stochasticity of grain chemistry requires special care in modeling. Previously methods based on the modified rate equation, the master equation, the moment equation, and Monte Carlo simulations have been used. [Aims] We attempt to develop a
Awad, B. Parise, Barzel, Barzel, Barzel, Biham, Biham, Caselli, Chang, Charnley, Charnley, Charnley, Charnley, Cuppen, F. Du, Garrod, Garrod, Garrod, Gillespie, Gillespie, Gillespie, Gillespie, Green, Hasegawa, Hasegawa, Lipshtat, Mattis, McQuarrie, Menten, Ohkubo, Rae, Stantcheva, Stantcheva, Stantcheva, Tielens, Tielens, Vasyunin, Vasyunin, Woodall   +38 more
core   +2 more sources

UV–Vis Spectra of Carbonic Acid: Rationalizing Experimental Redshifts between Monomer and Bulk based on (H2CO3)n Calculations

ChemPhysChem, Volume 26, Issue 18, September 19, 2025.
In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu, Bastian Klein, Chaojiang Zhang, Radu A. Talmazan, Thomas Loerting, Hinrich Grothe, Ralf I. Kaiser, Maren Podewitz   +7 more
wiley   +1 more source

Infrared Spectra of Solid HCN Embedded in Various Molecular Environments for Comparison with the Data Obtained with JWST

The Astrophysical Journal Letters
Hydrogen cyanide (HCN) molecules serve as an important tracer for the chemical evolution of elemental nitrogen in the regions of star and planet formation.
Maksim Ozhiganov, Mikhail Medvedev, Varvara Karteyeva, Ruslan Nakibov, Uliana Sapunova, Vadim Krushinsky, Ksenia Stepanova, Anastasia Tryastsina, Aleksandr Gorkovenko, Gleb Fedoseev, Anton Vasyunin   +10 more
doaj   +1 more source

Fire from Ice - Massive Star Birth from Infrared Dark Clouds

, 2017
I review massive star formation in our Galaxy, focusing on initial conditions in Infrared Dark Clouds (IRDCs), including the search for massive pre-stellar cores (PSCs), and modeling of later stages of massive protostars, i.e., hot molecular cores (HMCs).
Tan, Jonathan C.
core   +1 more source

Astrochemistry and Astrobiology over the last 20 years

Communications of the Byurakan Astrophysical Observatory
A review of the achievements of astrochemistry and astrobiology over the past 20 years is given. Advances in astrochemistry in understanding the processes of emergence and survival high molecular weight chemical compounds are directly related to the ...
A. Yeghikyan
semanticscholar   +1 more source

The UMIST database for astrochemistry 2012 [PDF]

Astronomy & Astrophysics, 2013
We present the fifth release of the UMIST Database for Astrochemistry (UDfA). The new reaction network contains 6173 gas-phase reactions, involving 467 species, 47 of which are new to this release. We have updated rate coefficients across all reaction types. We have included 1171 new anion reactions and updated and reviewed all photorates.
A. J. Markwick, Martin A. Cordiner, Martin A. Cordiner, Catherine Walsh, K. W. Smith, Tom J. Millar, D. McElroy   +6 more
openaire   +7 more sources