Results 71 to 80 of about 584,976 (219)

Structure and Spectroscopy of Criegee Intermediates in Gas‐ and Aqueous Environments

open access: yesHelvetica Chimica Acta, Volume 109, Issue 5, May 2026.
ABSTRACT The dynamics and spectroscopy of the small (H2COO) and large (CH3CHOO) Criegee intermediates (CIs) in the gas phase, inside/on water droplets, on amorphous solid water (ASW) and in bulk water are investigated using validated energy functions.
Cangtao Yin   +2 more
wiley   +1 more source

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

open access: yesSystems Research and Behavioral Science, Volume 43, Issue 3, Page 1212-1228, May/June 2026.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source

Soft X‐Ray Emission From Saturn's Magnetosheath Part I: 3D Modeling From MHD Data

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Saturn's magnetosheath hosts a mixed population of water‐group neutrals and solar wind plasma. We present a 3‐D model of soft X‐ray emission by ion‐neutral charge exchange in the near‐equatorial magnetosheath. The model employs MHD simulation data of plasma properties at Saturn, Enceladus‐genic neutral populations extrapolated from existing ...
P. C. Rogan   +6 more
wiley   +1 more source

The May 2024 Superstorm Coronal Mass Ejections as Observed by the Psyche Gamma‐Ray and Neutron Spectrometer

open access: yesSpace Weather, Volume 24, Issue 5, May 2026.
Abstract We report new measurements of high‐energy protons ejected by the sun during the May 2024 Ganon superstorm. Our observations were made by the Neutron Spectrometer (NS) on the Psyche spacecraft, which was located at a solar distance of approximately 2 AU and a Sun‐Earth‐Probe separation angle of 75°.
Madison Liebel   +3 more
wiley   +1 more source

Formation of All Three C2H4O Isomers—Ethylene Oxide (c-C2H4O), Acetaldehyde (CH3CHO), and Vinyl Alcohol (CH2CHOH)—in Ethanol-containing Interstellar Analog Ices

open access: yesThe Astrophysical Journal
Oxygen-containing complex organic molecules are key precursors to biorelevant compounds fundamental for the origins of life. However, the untangling of their interstellar formation mechanisms has just scratched the surface, especially for oxygen ...
Jia Wang   +3 more
doaj   +1 more source

Valence Threshold Photoionization Spectra of C5$_5$H and C5$_5$H2$_2$ Isomers

open access: yesChemPhysChem, Volume 27, Issue 8, 28 April 2026.
Mass‐selected threshold photoelectron spectra (TPES) of l‐C5H, HC5H, and c–C3H‐CCH were recorded using double‐imaging photoelectron‐photoion coincidence spectroscopy. These transient species were generated in situ by hydrogen abstraction from cyclopropylacetylene and 1,3‐pentadiyne.
Ugo Jacovella   +9 more
wiley   +1 more source

Scattering, Migration, Recircularization and Relaxation to Build out Galaxy Disks with Exponential Profiles

open access: yesThe Astrophysical Journal
Scattering of stars by interstellar clouds or massive clumps increases the stellar velocity dispersion and promotes a radial disk profile that is exponential.
Curtis Struck   +2 more
doaj   +1 more source

INTERSTELLAR CLOUDS BY SEARCHLIGHT

open access: yesThe Astronomical Journal, 2009
Interpretation of high-resolution observations of absorption by interstellar clouds of radiation from extragalactic sources should include the effect of the Earth's motion with respect to the source. High-resolution H I absorption profiles that are not heavily blended have been published for eight sources.
openaire   +1 more source

Prebiotic Organic Chemistry of Diketopiperazines

open access: yesAsian Journal of Organic Chemistry, Volume 15, Issue 4, April 2026.
Diketopiperazines (DKPs) are considered essential in many life forms, but their prebiotic importance has not been fully understood. This review aims to discuss prebiotic organic chemistry for experimentally and computationally simulated reactions involving DKPs. ABSTRACT Even though the significance of amino acids and polypeptides is well recognized in
Jun Ohata
wiley   +1 more source

Submillimeterwave Spectroscopy of and Interstellar Search for Nitrosomethane: CH3NO

open access: yesThe Astrophysical Journal
New measurements of nitrosomethane (CH _3 NO), a formamide isomer, were done up to 660 GHz. The molecule exhibits internal rotation motion from the CH _3 group, and therefore the analysis with a dedicated rho-axis method code, RAM36, was used. A total of
Laurent Margulès   +6 more
doaj   +1 more source

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