Results 41 to 50 of about 444,901 (298)

Contribution of 4~400 MeV protons galactic cosmic rays to annihilation radiation in orbital gamma spectrum near lunar space

He jishu, 2023
BackgroundThe annihilation radiation exhibits conspicuous features in the low-energy segment of the orbital gamma spectrum, which contains a substantial amount of geological information about the lunar surface.
ZHAO Jiankun, JIANG Shuang, LI Yonghui, ZENG Qi, WU Hexi, LIU Yujuan, LIU Yibao   +6 more
doaj   +1 more source

Attosecond gamma-ray pulses via nonlinear Compton scattering in the radiation dominated regime

, 2015
The feasibility of generation of bright ultrashort gamma-ray pulses is demonstrated in the interaction of a relativistic electron bunch with a counterpropagating tightly-focused superstrong laser beam in the radiation dominated regime.
Galow, Benjamin J., Hatsagortsyan, Karen Z., Keitel, Christoph H., Li, Jian-Xing   +3 more
core   +1 more source

TeV Gamma-rays from accreting magnetars in massive binaries [PDF]

, 2009
We consider the neutron star (NS) of the magnetar type inside the massive binary system. We determine the conditions under which the matter from the stellar wind can penetrate the inner magnetosphere of the magnetar. At some distance from the NS surface,
Acciari, Albert, Albert, Baan, Bednarek, Bednarek, Bednarek, Casares, Chernyakova, Dubus, Grundstrom, Harmanec, Kniffen, Lipunov, Ray, Rea, Smith, Tavani, Usov, van Dijk, W. Bednarek   +20 more
core   +1 more source

Anticancer sensitivities and biological characteristics of HCT116 cells resistant to the selective poly(ADP‐ribose) glycohydrolase inhibitor

FEBS Open Bio, EarlyView.
We analyzed alterations of PAR metabolism‐related proteins in PARG inhibitor‐resistant HCT116RPDD cells. Although PARG levels remained unchanged, HCT116RPDD cells exhibited reduced PARP1 and ARH3 expression and elevated PAR levels. Interestingly, HCT116RPDD cells exhibited slightly elevated intracellular NAD+/NADH and ATP levels. Our findings suggest a
Kaede Tsuda, Yoko Ogino, Akira Sato
wiley   +1 more source

Data on excessive risk of cancer from gamma radiation in residents of Bojnurd city

Data in Brief, 2018
The aim of the data was to measure the absorbed dose of gamma radiation in order to estimate the excessive risk of cancer-induced gamma radiation during the lifetime of Bojnurd residents.
Mohsen Khosroabadi, Seyed Abolghasem Haeri, Homa Rezaei Moghaddam, Mohammad Mirdoraghi   +3 more
doaj   +1 more source

Non-variable cosmologically distant gamma-ray emitters as an imprint of propagation of ultra-high-energy protons

, 2011
The acceleration cites of ultra-high-energy (UHE) protons can be traced by the footprint left by these particles propagating through cosmic microwave background (CMB) radiation.
A. Yu. Prosekin, Aharonian, Aharonian, Aharonian, Ando, Atwood, Blasi, Dermer, Dolag, Dolag, Essey, F. A. Aharonian, Franceschini, Gabici, Kelner, Kotera, Lehmer, Neronov, Neronov, Romano, Ryu, S. R. Kelner, Sigl, Tavecchio, Taylor   +24 more
core   +1 more source

Gamma-Ray Bursts, Ultra High Energy Cosmic Rays, and Cosmic Gamma-Ray Background [PDF]

, 1999
We argue that gamma-ray bursts (GRBs) may be the origin of the cosmic gamma-ray background radiation observed in GeV range. It has theoretically been discussed that protons may carry a much larger amount of energy than electrons in GRBs, and this large ...
Totani, Tomonori
core   +2 more sources

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source

A common origin of all the species of high-energy cosmic rays? [PDF]

, 1999
Cosmic ray nuclei, cosmic ray electrons with energy above a few GeV, and the diffuse gamma-ray background radiation (GBR) above a few MeV, presumed to be extragalactic, could all have their origin or residence in our galaxy and its halo.
Antoniou, Nikos, Dar, Arnon, De Rújula, A.   +2 more
core   +1 more source

Photon-induced Nucleosynthesis: Current Problems and Experimental Approaches

, 2007
Photon-induced reactions play a key role in the nucleosynthesis of rare neutron-deficient p-nuclei. The paper focuses on (gamma,alpha), (gamma,p), and (gamma,n) reactions which define the corresponding p-process path.
Arnould, Arnould, Atzrott, Avrigeanu, Axel, Bartholomew, Baur, Bork, Chloupek, Daly, Demetriou, Fröhlich, Fujimoto, Fülöp, Fülöp, Galanopoulos, Galaviz, Gledenov, Goko, Goriely, Gyürky, Gyürky, Gyürky, Gyürky, H. Utsunomiya, Hahn, Harissopulos, Harissopulos, Hayakawa, Ito, Koehler, Kopecky, Laird, Lambert, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, P. Mohr, Prantzos, Pruet, Rapp, Rapp, Rauscher, Rauscher, Rauscher, Rauscher, Rayet, Rayet, Sauter, Shizuma, Somorjai, Sonnabend, Sonnabend, Tanaka, Teichert, Tsagari, Utsunomiya, Utsunomiya, Utsunomiya, Utsunomiya, Verdieck, Vogt, Wallerstein, Weller, Woosley, Zs. Fülöp, Özkan, Özkan   +76 more
core   +1 more source