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New U-Pb and Sm-Nd Data and REE Distribution in Sulphides of Paleoproterozoic PGE Layered Intrusions in the Arctic Part of the Fennoscandian Shield

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Open Journal of Geology 2019年第11期9卷 768-782页

作者： Tamara Bayanova Irina Elizarova Pavel Serov nadezhda ekimova Evgeny Kunakkuzin Ekaterina Steshenko Yury Neradovsky Markku Iljina Dmitry Zhirov Geological Institute of the Kola Science Centre Russian Academy of Sciences Apatity Russia Institute of the North Industrial Environmental Problems of the Kola Science Centre Russian Academy of Sciences Apatity Russia Geological Survey of Finland Rovaniemi Finland

The U-Pb (on zircon) and Sm-Nd analysis is a popular isotope-geochronological tool for estimating the age of rocks from PGE mafic-ultramafic intrusions. Sulphides can be used to study the geochronology of ore processes as well, since they should indicate the time of ore mineralization. Gabbronorite has been sampled from the Passivaara reef at the Penikat layered intrusion (Finland) for U-Pb and Sm-Nd isotope single zircon analyses in order to separate sulphide minerals. The Sm-Nd isotope age of gabbronorite has been dated at 2426 ± 36 Ma;eNd(T) = −1.4 ± 0.4. The Sm-Nd isotope age on sulphides and rock-forming minerals reflects the crystallization time of the ore-bearing gabbronorite from the Passivaara reef of the Penikat layered intrusion. The mass-spectrometer analytical environment and modes of operation have been adjusted to detect REE in sulphide minerals on example of pyrite from the PGE Penikat layered intrusion (Finland) and chalcopyrite from the Talnakh deposit (Norilsk area, Russia) has been estimated. The total REE content in pyrite is ca. 3.5 ppm, which is enough to define the Sm-Nd age of pyrite. The study shows how to use the mineral/chondrite spectra to evaluate the accuracy of the REE analytical results on example of State Standard Sample 2463 (Russia).

关键词： Platinum Group Elements Layered Intrusion Rare Earth Elements Uranium-Lead and Samarium-Neodymium Analyses Zircon Sulphide Minerals Fennoscandian Shield

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Will Russia become a blueprint for emerging nations’hightech reforms?evidence from a 26-countries dataset

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International Journal of Innovation Studies 2023年第4期7卷 312-324页

作者： Elena G.Popkova Aleksei V.Bogoviz Ksenia V.ekimova Bruno S.Sergi RUDN University MoscowRussia Independent Researcher MoscowRussia Department of Financial Management Plekhanov Russian University of EconomicsMoscowRussian Federation University of Messina Italy

The central question of this study concerns the emergence of the Russian development model over the past *** highlights that this development model could be a blueprint for other emerging *** is one of the leaders of the Fourth Industrial Revolution,having improved its standing in international ratings for quality of life,human development,sustainable development,innovation,and high ***'s experience can be helpful to developing *** study and evaluate innovation in a digital business society amid technological turmoil competing with artificial *** focus on the digital competitiveness index,the density of robots in industry,and unemployment,thereby building a novel comprehensive dataset of the economy's systemic socioeconomic and technological development under the conditions of the Fourth Industrial *** draw attention to Russia's new business environment that exhibits valuable specifics(e.g.,emerging institutions and imperfect competition as clouds in the business landscape)shaped by its current transitional *** estimate that technological progress will ensure digitalization,the prevention of extended unemployment,and the achievement of full-scale ***'s innovation policy has substantial advantages for emerging market *** study also shows that institutionalizing the new approach provides enduring digital economy advantages for emerging markets,including effectiveness,progressiveness,and sustainability.

关键词： New business paradigms Innovation Digital modernization Industry 4.0 Smart technologies Russia Emerging markets Sustainability Unfolding new social innovations New digital era

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The Effects of Tissue Regenerative Status on Hormesis in Dogs Irradiated during Their Lifespan

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Open Journal of Biophysics 2017年第3期7卷 101-115页

作者： Aleksey N. Shoutko Ludmila P. ekimova Laboratory for Improvement of the Radiation Treatment Methods Russian Research Center for Radiology and Surgical Technologies Saint-Petersburg Russia

The goal of this study was to evaluate the influence of natural variation in the regenerative status of dog tissues on the signs of hormesis, which are evident after total body exposure to low daily doses of external gamma radiation throughout the lifespan. Ninety beagle dogs of both sexes were irradiated with cobalt 60 at 0.003 Gy/day commencing 1 year after birth to death. Control (n = 169) and irradiated animals underwent whole-life clinical observation and autopsy, and were then retrospectively divided into two subgroups with (W) or without benign tumors or tumors of unknown nature (WO) that were clinically recorded on single days throughout the lifespan. Radiation hormesis was only detected in subgroup WO, which had life span (LS) of 10.7 years in the absence of radiation. The radiogenic prolongation of life to 11.8 years in the WO subgroup (p 10-fold for both). The data exclude the notion that radiation is associated with healing, but suggest that certain pathologies (e.g., hemoblastoses) may be substituted with other less dangerous somatic diseases in weaker animals only.

关键词： Hormesis Chronic Irradiation Dogs Survival Neoplasms Reparation/Regeneration Hemopoiesis

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