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Mechanism for fast radio bursts
(American Physical Society, 2016-01)
Fast radio bursts are mysterious transient sources likely located at cosmological distances. The derived brightness temperatures exceed by many orders of magnitude the self-absorption limit of incoherent synchrotron ...
T Tauri stars as \gamma-ray source in the Rho Ophiuchi region
(Ediciones de la Asociación Argentina de Astronomía, 2020-07)
More than 30% of γ -ray sources detected in the last source catalog of the Fermi satellite have no observational counterpart at other frequencies. A significant fraction of these sources is positionally in agreement with ...
On the possibilities of high-energy neutrino production in the jets of microquasar SS433 in light of new observational data
(Elsevier Science, 2019-05)
Microquasar SS433 is composed by a supergiant star that feeds mass through a supercritical accretion disk to a ∼10 M ⊙ black hole. The latter launches two oppositely directed jets that precess with a period of 162 days. ...
Evaluation of radioadaptive response induced in CHO-K1 cells in a non-traditional model
(Taylor & Francis, 2009-02)
Purpose: The present study was designed to evaluate the effects of sequential exposures to low doses of gamma-radiation that induce a radioadaptive response to a later high-dose of radiation in CHO-K1 cells. Materials and ...
Radiation-induced preparation of core/shell gold/albumin nanoparticles
(Pergamon-Elsevier Science Ltd, 2018-01)
Nanoparticles (NPs) are one of the most promising nanomaterials to be used in the biomedical field. Gold NPs (Au-NPs) have been covered with monolayers of many different molecules and macromolecules to prepare different ...
Optical spectroscopic observations of gamma-ray blazar candidates. IX. Optical archival spectra and further observations from SOAR and OAGH
(Springer, 2019-05-10)
Nearly one third of the sources in the Fermi-LAT catalogs lacks a lower energy counterpart, hence being referred as unidentified/unassociated gamma-ray sources (UGSs). In order to firmly classify them, dedicated multifrequency ...
Molecular clouds as reservoir of cosmic rays
(Paideia, 2013-01)
Giant molecular clouds (GMCs) are emerging as a new population of -ray sources; with detections by instruments such as HESS and Fermi. These dense clouds are targets for cosmic rays (CRs) -- locally accelerated or not ...
Histamine prevents radiation-induced mesenchymal changes in breast cancer cells
(Academic Press Ltd - Elsevier Science Ltd, 2016-09)
Radiotherapy is a prime option for treatment of solid tumors including breast cancer though side effects are usually present. Experimental evidence shows an increase in invasiveness of several neoplastic cell types through ...
Radiación de altas energías en fuentes ultraluminosas de rayos X
(Asociación Argentina de Astronomía, 2018-08)
In this work we model the non-thermal radiative spectrum of an ultraluminous X-ray source (ULX) located in the central region of the starburst galaxy NGC 253. It is assumed that ULXs are accreting sources with jets and ...
Metabolism of terpenes in the response of grape (Vitis vinifera L.) leaf tissues to UV-B radiation
(Pergamon-Elsevier Science Ltd, 2012-01)
This study investigated the terpene profiles as determined by GC-EIMS analysis of in vitro cultured plants of Vitis vinifera exposed to a "field-like" dose of UV-B (4.75 kJ m-2 d-1) administered at two different fluence ...