Results 41 to 50 of about 36,298 (268)

The origin of cosmic rays and TeV gamma-ray astronomy

open access: yesEPJ Web of Conferences, 2013
Cosmic rays are accelerated to high energies in Galactic and extragalactic objects like Supernova remnants (SNR) and active galactic nuclei (AGN). How these accelerators work and how efficient they accelerate different types of particles to energies of ...
Maier Gernot
doaj   +1 more source

MUTAGENIC EFFECTS OF GAMMA IRRADIATION ON Centaurea cyanus, L. [PDF]

open access: yesJournal of Plant Production, 2007
The experiments were carried out to study the effect of different doses of gamma-rays on some morphological traits in the M1 and M2 - generations of Centaurea cyanus.
Hoda El-Mokadem,
doaj   +1 more source

The Gamma-ray Window to Intergalactic Magnetism

open access: yesUniverse, 2021
One of the most promising ways to probe intergalactic magnetic fields (IGMFs) is through gamma rays produced in electromagnetic cascades initiated by high-energy gamma rays or cosmic rays in the intergalactic space.
Rafael Alves Batista, Andrey Saveliev
doaj   +1 more source

Origin of the Gamma Rays* [PDF]

open access: yesNature, 1932
IT has long been known that some of the radio-elements emit a penetrating type of X-rays known as the gamma rays. It is clear that these radiations arising from the nucleus of the radioactive atom represent in a sense some of the characteristic modes of vibration of the nuclear structure. The wave-length and quantum energy of many of the stronger lines
openaire   +1 more source

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

open access: yesFEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey   +4 more
wiley   +1 more source

Search for Joint Multimessenger Signals from Potential Galactic Cosmic-Ray Accelerators with HAWC and IceCube

open access: yesThe Astrophysical Journal
The origin of high-energy galactic cosmic rays is yet to be understood, but some galactic cosmic-ray accelerators can accelerate cosmic rays up to PeV energies.
R. Alfaro   +495 more
doaj   +1 more source

Gamma radiation: A potential tool for abiotic stress mitigation and management of agroecosystem

open access: yesPlant Stress, 2022
Context: Being sessile, it is impossible for the plants to evade from the unfavourable environmental conditions prevailing due to various abiotic stresses like heat, salinity, drought, flood, heavy metals, and high radiance amongst many others.
Priya Katiyar   +2 more
doaj   +1 more source

The Gamma‐Ray Observatory [PDF]

open access: yesAnnals of the New York Academy of Sciences, 1989
AbstractThe Gamma-Ray Observatory (GRO), a Shuttle-launched free-flying Observatory is currently scheduled for launch in November 1990. The mission provides nearly six orders of magnitude in spectral coverage, from about 50 KeV to about 30 GeV, with a sensitivity over the entire range over an order of magnitude greater than that of previous ...
openaire   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

open access: yesAdvanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice   +2 more
wiley   +1 more source

High-energy Electromagnetic, Neutrino, and Cosmic-Ray Emission by Stellar-mass Black Holes in Disks of Active Galactic Nuclei

open access: yesThe Astrophysical Journal, 2023
Some Seyfert galaxies are detected in high-energy gamma rays, but the mechanism and site of gamma-ray emission are unknown. Also, the origins of the cosmic high-energy neutrino and MeV gamma-ray backgrounds have been veiled in mystery since their ...
Hiromichi Tagawa   +2 more
doaj   +1 more source

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