Results 21 to 30 of about 199,466 (288)
Stacking Interactions: A Supramolecular Approach to Upgrade Weak Halogen Bond Donors
Chemistry – A European Journal, Volume 28, Issue 70, December 15, 2022., 2022 π‐Stacking interactions turn on halogen σ‐hole in unactivated chloro‐ and bromo‐arenes which are thus enabled to function as good halogen bonding donors. Abstract The co‐crystallization of tetracyanobenzene (TCB) with haloarenes ArX provided six new co‐crystals TCB ⋅ ArX (ArX=PhCl, PhBr, 4‐MeC6H4Cl, 4‐MeC6H4Br, 4‐MeOC6H4Cl, 1,2‐Br2C6H4) which were ...
Sergey V. Baykov +6 more
wiley +1 more source
Failed supernova remnants [PDF]
Publications of the Astronomical Society of Japan, 2021 Abstract In a failed supernova, partial ejection of the progenitor’s outer envelope can occur due to weakening of the core’s gravity by neutrino emission in the protoneutron star phase. We consider emission when this ejecta sweeps up the circumstellar material, analogous to supernova remnants (SNRs). We focus on failed explosions of blue
openaire +3 more sources
Supernova Remnants in the Irregular Galaxy NGC 4449
The Astrophysical Journal, 2023 The nearby irregular galaxy NGC 4449 has a star formation rate of ∼0.4 M _☉ yr ^−1 and should host of order 70 supernova remnants (SNRs) younger than 20,000 yr, a typical age for SNRs expanding into an interstellar medium (ISM) with a density of 1 cm ^−3
P. Frank Winkler +2 more
doaj +1 more source
Absorption-line Observations of and CO in Sight Lines Toward the Vela and W28 Supernova Remnants
The Astrophysical Journal, 2023 Supernova remnants act as particle accelerators, providing the cosmic-ray protons that permeate the interstellar medium and initiate the ion–molecule reactions that drive interstellar chemistry. Enhanced fluxes of cosmic-ray protons in close proximity to
Nick Indriolo
doaj +1 more source
iMeta, Volume 1, Issue 4, December 2022., 2022 We developed a tool to get high‐quality genomes with high taxonomic resolution by combining the cobarcoding information with public references. Compared with the conventional combination strategies, our pipeline generated a large number of high‐quality genomes for the human microbial cobarcoding data sets. Abstract Metagenomic evidence of great genetic
Yanwei Qi +12 more
wiley +1 more source
Cosmic-Ray Acceleration in Supernova Remnants
Universe, 2023 Supernova Remnants (SNRs) are generally believed to produce the cosmic rays in our Galaxy due to the powerful supernova blast waves generated by expanding SNRs.
Vera G. Sinitsyna, Vera Y. Sinitsyna
doaj +1 more source
Statistical Analysis of Supernova Remnants in the Large Magellanic Cloud [PDF]
, 2017 We construct the most complete sample of supernova remnants (SNRs) in any galaxy—the Large Magellanic Cloud (LMC) SNR sample. We study their various properties such as spectral index (α), size, and surface brightness.
L. Bozzetto +14 more
semanticscholar +1 more source
Revised Distances to 21 Supernova Remnants [PDF]
, 2017 We carry out a comprehensive study of H i 21 cm line observations and 13CO line observations of 21 supernova remnants (SNRs). The aim of the study is to search for H i absorption features to obtain kinematic distances in a consistent manner.
S. Ranasinghe, D. Leahy, W. Tian
semanticscholar +1 more source
European Journal of Neuroscience, Volume 56, Issue 12, Page 6141-6161, December 2022., 2022 Chemical synapses are tiny and overcrowded environments enriched with thousands of protein species. Many efforts have been devoted to developing sensors and actuators able to evaluate and control synaptic communication. Most of these recent tools are based on the engineering of one or more specific synaptic proteins used to target active moieties to ...
Jacopo Lamanna +3 more
wiley +1 more source
Pre-acceleration in the Electron Foreshock. II. Oblique Whistler Waves
The Astrophysical Journal, 2023 Thermal electrons have gyroradii many orders of magnitude smaller than the finite width of a shock, thus need to be pre-accelerated before they can cross it and be accelerated by diffusive shock acceleration.
Paul J. Morris +5 more
doaj +1 more source