Results 61 to 70 of about 230,400 (298)

Solar Energetic Particle Track-production Rates at 1 au: Comparing In Situ Particle Fluxes with Lunar Sample-derived Track Densities

The Astrophysical Journal Letters, 2023
Heavy ( Z > 26) solar energetic particles (SEPs) with energies ∼1 MeV nucleon ^−1 are known to leave visible damage tracks in meteoritic materials. The density of such “solar flare tracks” in lunar and asteroidal samples has been used as a measure of a ...
A. R. Poppe, P. S. Szabo, E. R. Imata, L. P. Keller, R. Christoffersen   +4 more
doaj   +1 more source

Energetic Particles in the Local Bubble [PDF]

International Astronomical Union Colloquium, 1997
AbstractThe current status of observations of energetic particles in the “local bubble” is reviewed. This includes primarily “direct” measurements of cosmic rays made in the Solar System, but also the “remote sensing” made possible by observing cosmic ray produced γ-rays in the nearby interstellar clouds.
G. E. Morfill, M. J. Freyberg
openaire   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

In-depth Analysis of the 2022 March 28 3He-rich Solar Energetic Particle Event

The Astrophysical Journal
On 2022 March 28, a solar eruption from active region AR 12975 produced a solar energetic particle (SEP) event observed by BepiColombo (BC; 0.57 au), STEREO-A (STA; 0.97 au), GOES (1.0 au), ACE (L1), and Wind (L1).
Mirko Stumpo, Monica Laurenza, Simone Benella, Anna Milillo, Christina Plainaki, Matthew J. West, Pietro Zucca, Stas Barabash, Daniel Heyner, Ali Varsani, Go Murakami, Shyama Narendranath, Alessandro Aronica, H. U. Auster, Lorenzo Biasiotti, Alessandro Brin, Luca Colasanti, D. Constantinescu, Elisabetta De Angelis, Pier Paolo Di Bartolomeo, D. Fischer, Stavro Ivanovski, Harald Jeszenszky, Adrian Kazakov, Gunter Laky, Valeria Mangano, Stefano Massetti, Martina Moroni, Alessandro Mura, Livio Narici, Hans Nilsson, Raffaella Noschese, Stefano Orsini, Grace Richards, I. Richter, Rosanna Rispoli, Beatriz Sanchez-Cano, Roberto Sordini, Srikar P. Tadepalli, Nello Vertolli, Martin Wieser, Hayley Williamson   +41 more
doaj   +1 more source

The Influence of Magnetic Turbulence on the Energetic Particle Transport Upstream of Shock Waves

Atmosphere, 2021
Energetic particles are ubiquitous in the interplanetary space and their transport properties are strongly influenced by the interaction with magnetic field fluctuations.
Silvia Perri, Giuseppe Prete, Francesco Malara, Francesco Pucci, Gaetano Zimbardo   +4 more
doaj   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

FOXTAIL: Modeling the nonlinear interaction between Alfv\'en eigenmodes and energetic particles in tokamaks

, 2016
FOXTAIL is a new hybrid magnetohydrodynamic-kinetic code used to describe interactions between energetic particles and Alfv\'en eigenmodes in tokamaks with realistic geometries.
Hellsten, Torbjörn, Johnson, Thomas, Tholerus, Emmi   +2 more
core   +1 more source

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

Energetic particle dynamics in Mercury's magnetosphere [PDF]

Journal of Geophysical Research: Space Physics, 2013
We investigate the drift paths of energetic particles in Mercury's magnetosphere by tracing their motion through a model magnetic field. Test particle simulations solving the full Lorentz force show a quasi‐trapped energetic particle population that gradient and curvature drift around the planet via “Shabansky” orbits, passing though high latitudes in ...
B. M. Walsh, A. S. Ryou, D. G. Sibeck, I. I. Alexeev   +3 more
openaire   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source