Results 31 to 40 of about 1,779 (176)

Astrochemistry: Synthesis and Modelling [PDF]

open access: yes, 2012
We discuss models that astrochemists have developed to study the chemical composition of the interstellar medium. These models aim at computing the evolution of the chemical composition of a mixture of gas and dust under as- trophysical conditions. These conditions, as well as the geometry and the physical dynamics, have to be adapted to the objects ...
Wakelam, Valentine   +2 more
openaire   +4 more sources

SICOAQ 2024: Launching the First Colombian Astrochemistry Symposium in Bogotá

open access: yesRevista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
The First Colombian Astrochemistry Symposium (SICOAQ), held in Bogotá in October 2024,brought together 98 participants, including 23 speakers, to foster interdisciplinary collaboration in the rapidly growing field of astrochemistry.
Heidy Mayerly Quitián Lara   +8 more
doaj   +1 more source

The astrochemistry of life [PDF]

open access: yesAstronomy and Geophysics, 2001
There are many unanswered astronomical questions about the chemical basis of life; a meeting held in August this year by the Astrophysical Chemistry Group of the RAS and the Royal Society of Chemistry took as its starting point the understanding of a number of questions, and reviews of progress towards the answers, report Anita Richards and Peter Sarre.
Anita Richards, Peter Sarre
openaire   +1 more source

Database of space life investigations and bioinformatics of microbiology in extreme environments

open access: yesFrontiers in Microbiology, 2022
Biological experiments performed in space crafts like space stations, space shuttles, and recoverable satellites has enabled extensive spaceflight life investigations (SLIs).
Junyong Wang   +11 more
doaj   +1 more source

Infrared spectra of methane-containing ice mixtures for JWST data analyses

open access: yesAstronomy & Astrophysics
Context. Solid methane (CH4) is an important molecule in interstellar and planetary environments, serving as a precursor to complex organic compounds, and it is a potential biosignature in exoplanetary studies.
Karteyeva V.   +4 more
doaj   +1 more source

Three-body aggregation of guest molecules as a key step in methane hydrate nucleation and growth

open access: yesCommunications Chemistry, 2022
Gas hydrates have an important role in environmental and astrochemistry, as well as energy materials, but the hydrate nucleation process is not fully understood.
Wenfeng Hu   +9 more
doaj   +1 more source

Identification of solid N2O in interstellar ices using open JWST data

open access: yesAstronomy & Astrophysics
Context. Only six molecules containing an N-O bond are detected in the gaseous phase of the interstellar medium. One of them is nitrous oxide (N2O), which was unsuccessfully searched for in solid form since the launch of the Infrared Space Observatory ...
Karteyeva V.   +4 more
doaj   +1 more source

Engaging Isatins and Amino Acids in Multicomponent One-Pot 1,3-Dipolar Cycloaddition Reactions—Easy Access to Structural Diversity

open access: yesMolecules, 2023
Multicomponent reactions (MCRs) have undoubtedly emerged as the most indispensable tool for organic chemists worldwide, finding extensive utility in the synthesis of intricate natural products, heterocyclic molecules with significant bioactivity, and ...
Hua Zhao, Yufen Zhao
doaj   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

open access: yesChemPhysChem, 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

Chemical Kinetics of 2‐, 4‐, and 2,4‐Seleno‐Uracils at Low Temperatures: Tautomerizations and Rotamerizations on Inert Matrices

open access: yesInternational Journal of Chemical Kinetics, EarlyView.
ABSTRACT In the interstellar medium, chemical reactions proceed under conditions vastly different to those on Earth; these include extremely low temperatures and densities and take place in the gas phase and on water–ice grains. Understanding the energetics and more importantly the kinetics of such reactions is of relevance to the consequences on how ...
Judith Wurmel, John M. Simmie
wiley   +1 more source

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