86 research outputs found
ĐĐĄĐĄĐĐĐĐĐĐĐĐĐ Đ ĐĐĐĐĄĐĐĐĐ ĐĐ«ĐąĐĐĐ«Đ„ ĐĐĐĐĐĐ«Đ„ ХЧĐйЧĐĐĐĐ
Đ ŃĐ°Đ±ĐŸŃĐ” ĐŸĐżĐžŃŃĐČĐ°Đ”ŃŃŃ ĐžŃŃĐ»Đ”ĐŽĐŸĐČĐ°ĐœĐžĐ” бŃŃĐŸĐČŃŃ
ĐłĐ°Đ·ĐŸĐČŃŃ
ŃŃĐ”ŃŃĐžĐșĐŸĐČ, ĐžŃ
ŃĐ°Đ·ĐœĐŸĐČĐžĐŽĐœĐŸŃŃĐž ĐżĐŸ ĐżŃĐžĐœŃĐžĐżŃ ĐŽĐ”ĐčŃŃĐČĐžŃ, ĐŸŃĐœĐŸĐČĐœŃĐ” ĐżŃĐ”ĐžĐŒŃŃĐ”ŃŃĐČĐ° Đž ĐžŃ
ĐŒĐ”ŃŃĐŸĐ»ĐŸĐłĐžŃĐ”ŃĐșОД Ń
Đ°ŃĐ°ĐșŃĐ”ŃĐžŃŃĐžĐșĐž. Đ ŃĐ°ĐșжД ŃĐ°ŃŃĐŒĐŸŃŃĐ”ĐœŃ Ń
Đ°ŃĐ°ĐșŃĐ”ŃĐžŃŃĐžĐșĐž ĐżŃĐžŃĐŸĐŽĐœĐŸĐłĐŸ газа
Multimessenger NuEM Alerts with AMON
The Astrophysical Multimessenger Observatory Network (AMON), has developed a real-time multi-messenger alert system. The system performs coincidence analyses of datasets from gamma-ray and neutrino detectors, making the Neutrino-Electromagnetic (NuEM) alert channel. For these analyses, AMON takes advantage of sub-threshold events, i.e., events that by themselves are not significant in the individual detectors. The main purpose of this channel is to search for gamma-ray counterparts of neutrino events. We will describe the different analyses that make-up this channel and present a selection of recent results
Search for Spatial Correlations of Neutrinos with Ultra-high-energy Cosmic Rays
For several decades, the origin of ultra-high-energy cosmic rays (UHECRs) has been an unsolved question of high-energy astrophysics. One approach for solving this puzzle is to correlate UHECRs with high-energy neutrinos, since neutrinos are a direct probe of hadronic interactions of cosmic rays and are not deflected by magnetic fields. In this paper, we present three different approaches for correlating the arrival directions of neutrinos with the arrival directions of UHECRs. The neutrino data are provided by the IceCube Neutrino Observatory and ANTARES, while the UHECR data with energies above âŒ50 EeV are provided by the Pierre Auger Observatory and the Telescope Array. All experiments provide increased statistics and improved reconstructions with respect to our previous results reported in 2015. The first analysis uses a high-statistics neutrino sample optimized for point-source searches to search for excesses of neutrino clustering in the vicinity of UHECR directions. The second analysis searches for an excess of UHECRs in the direction of the highest-energy neutrinos. The third analysis searches for an excess of pairs of UHECRs and highest-energy neutrinos on different angular scales. None of the analyses have found a significant excess, and previously reported overfluctuations are reduced in significance. Based on these results, we further constrain the neutrino flux spatially correlated with UHECRs
Selenium biochemistry and its role for human health
Despite its very low level in humans, selenium plays an important and unique role among the (semi)metal trace essential elements because it is the only one for which incorporation into proteins is genetically encoded, as the constitutive part of the 21st amino acid, selenocysteine. Twenty-five selenoproteins have been identified so far in the human proteome. The biological functions of some of them are still unknown, whereas for others there is evidence for a role in antioxidant defence, redox state regulation and a wide variety of specific metabolic pathways. In relation to these functions, the selenoproteins emerged in recent years as possible biomarkers of several diseases such as diabetes and several forms of cancer. Comprehension of the selenium biochemical pathways under normal physiological conditions is therefore an important requisite to elucidate its preventing/therapeutic effect for human diseases. This review summarizes the most recent findings on the biochemistry of active selenium species in humans, and addresses the latest evidence on the link between selenium intake, selenoproteins functionality and beneficial health effects. Primary emphasis is given to the interpretation of biochemical mechanisms rather than epidemiological/observational data. In this context, the review includes the following sections: (1) brief introduction; (2) general nutritional aspects of selenium; (3) global view of selenium metabolic routes; (4) detailed characterization of all human selenoproteins; (5) detailed discussion of the relation between selenoproteins and a variety of human diseases
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