Results 51 to 60 of about 10,794 (262)

Spectroscopic FTIR study for pathway of ribose formation via formose reaction in Astrochemistry

open access: yesJournal of Physics: Conference Series, 2023
Ribose is one of the crucial molecular species in the study of the origin of life as it is the backbone of ribonucleic acid (RNA). On the early Earth, sugars including ribose are thought to be formed through formose reaction.
S. Homnan   +7 more
semanticscholar   +1 more source

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

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

Recommended Thermal Rate Coefficients for the C + H$_3^+$ Reaction and Some Astrochemical Implications [PDF]

open access: yes, 2016
We have incorporated our experimentally derived thermal rate coefficients for C + H$_3^+$ forming CH$^+$ and CH$_2^+$ into a commonly used astrochemical model.
Buzard, C. F.   +6 more
core   +3 more sources

Gas-phase Chemistry in the Interstellar Medium: The Role of Laboratory Astrochemistry

open access: yesFrontiers in Astronomy and Space Sciences, 2022
“Who” and how? In this simple question the complexity of the interstellar chemistry is encapsulated. “Who” refers to what molecules are present in the interstellar medium (ISM) and “how” to the mechanisms that led to their formation.
C. Puzzarini
semanticscholar   +1 more source

Electron irradiation and thermal chemistry studies of interstellar and planetary ice analogues at the ICA astrochemistry facility [PDF]

open access: yesEuropean Physical Journal D : Atomic, Molecular and Optical Physics, 2021
The modelling of molecular excitation and dissociation processes relevant to astrochemistry requires the validation of theories by comparison with data generated from laboratory experimentation.
D. Mifsud   +12 more
semanticscholar   +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

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

The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets [PDF]

open access: yes, 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

Cluster Beam Study of (MgSiO3)+-Based Monomeric Silicate Species and Their Interaction with Oxygen: Implications for Interstellar Astrochemistry

open access: yesACS Earth and Space Chemistry, 2022
Silicates are ubiquitously found as small dust grains throughout the universe. These particles are frequently subject to high-energy processes and subsequent condensation in the interstellar medium (ISM), where they are broken up into many ultrasmall ...
Joan Mariñoso Guiu   +5 more
semanticscholar   +1 more source

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