Platinum-Containing nanocomposites based on Humic substances from brown coal

In the presentreport we look intosynthesized silver and gold-containing nanocomposites based on humic substances. The composition and properties of humic substances isolated from brown coal in Mongolian deposits have beenestablished. The methodology of obtaining platinum-containing nanobiocomposites using a matrix of humic substances is described. Our investigation shows thattheir composition and structure are characterized by a complex of modern physicochemical methods, such as X-ray, energy dispersive spectral microanalysis, infrared spectroscopy (IR), ultraviolet spectroscopy (UV), X-ray diffraction analysis, Scanning electron microscopy (SEM)

ПОЛИТИКА РОССИИ В АРКТИКЕ В СФЕРЕ ПРОДОВОЛЬСТВЕННОЙ БЕЗОПАСНОСТИ

The article analyzes current food security issues across the Russian Arctic, which were considered at the International Arctic Forum «ARCTIC: Territory of Dialogue» on March 29–30, 2017 and at the International Scientific and Practical Conference «Technologies of Social, Economic and Logistic Processes of the Arctic zone of Russia: History and Modernity» held at the Krasnoyarsk State Agrarian University on March 30–31, 2017.Particular attention is drawn to the practical provision of certain areas with basic agricultural products. Measures are proposed for the active involvement of the population of Arctic territories and indigenous peoples of the Far North in self-sufficiency of food with the use of products of traditional nature management of indigenous peoples. The complex approach to supplying the population of the northern territories of the Siberian Arctic with balanced food in accordance with the directions of food security in the world elaborated by the UN in the Millennium Declaration is substantiated.В статье анализируются актуальные в современных условиях вопросы обеспечения продовольственной безопасности арктических регионов России, которые рассматривались на Международном Арктическом форуме 29–30 марта 2017 г. «АРКТИКА – территория диалога» и на Международной научно-практической конференции «Технологии развития социальных, экономических и логистических процессов Арктической зоны России: история и современность» в Красноярске 30–31 марта 2017 года, проходившей в Красноярском государственном аграрном университете.Особое внимание обращается на реальное обеспечение отдельных районов основными продуктами сельского хозяйства. Предлагаются меры по активному вовлечению населения арктических территорий и коренных малочисленных народов Крайнего Севера в самообеспечение продовольствием с использованием продукции традиционного природопользования коренных малочисленных народов.Обосновывается комплексный подход к обеспечению населения северных территорий сибирской Арктики сбалансированным продовольствием в соответствии с направлениями продовольственной безопасности в мире, разработанными ООН в Декларации Тысячелетия

Managing Excess Lead Iodide with Functionalized Oxo‐Graphene Nanosheets for Stable Perovskite Solar Cells

Stability issues could prevent lead halide perovskite solar cells (PSCs) from commercialization despite it having a comparable power conversion efficiency (PCE) to silicon solar cells. Overcoming drawbacks affecting their long-term stability is gaining incremental importance. Excess lead iodide (PbI2) causes perovskite degradation, although it aids in crystal growth and defect passivation. Herein, we synthesized functionalized oxo-graphene nanosheets (Dec-oxoG NSs) to effectively manage the excess PbI2. Dec-oxoG NSs provide anchoring sites to bind the excess PbI2 and passivate perovskite grain boundaries, thereby reducing charge recombination loss and significantly boosting the extraction of free electrons. The inclusion of Dec-oxoG NSs leads to a PCE of 23.7 % in inverted (p-i-n) PSCs. The devices retain 93.8 % of their initial efficiency after 1,000 hours of tracking at maximum power points under continuous one-sun illumination and exhibit high stability under thermal and ambient conditions

Measurement of nuclear modification factors of gamma(1S)), gamma(2S), and gamma(3S) mesons in PbPb collisions at root s(NN)=5.02 TeV

The cross sections for ϒ(1S), ϒ(2S), and ϒ(3S) production in lead-lead (PbPb) and proton-proton (pp) collisions at √sNN = 5.02 TeV have been measured using the CMS detector at the LHC. The nuclear modification factors, RAA, derived from the PbPb-to-pp ratio of yields for each state, are studied as functions of meson rapidity and transverse momentum, as well as PbPb collision centrality. The yields of all three states are found to be significantly suppressed, and compatible with a sequential ordering of the suppression, RAA(ϒ(1S)) > RAA(ϒ(2S)) > RAA(ϒ(3S)). The suppression of ϒ(1S) is larger than that seen at √sNN = 2.76 TeV, although the two are compatible within uncertainties. The upper limit on the RAA of ϒ(3S) integrated over pT, rapidity and centrality is 0.096 at 95% confidence level, which is the strongest suppression observed for a quarkonium state in heavy ion collisions to date. © 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.Peer reviewe

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

This paper presents new sets of parameters (“tunes”) for the underlying-event model of the HERWIG7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at s=0.9, 7, and 13Te. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the dat

Azimuthal separation in nearly back-to-back jet topologies in inclusive 2-and 3-jet events in pp collisions at root s=13TeV

A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, Delta phi(12), is presented. The measurement considers events where the two leading jets are nearly collinear ("back-to-back") in the transverse plane and is performed for several ranges of the leading jet transverse momentum. Proton-proton collision data collected with the CMS experiment at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 35.9 fb(-1) are used. Predictions based on calculations using matrix elements at leading-order and next-to-leading-order accuracy in perturbative quantum chromodynamics supplemented with leading-log parton showers and hadronization are generally in agreement with themeasurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region 177 degrees <Delta phi(12) <180 degrees. The 2- and 3-jet measurements are not simultaneously described by any of models.Peer reviewe

Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the dilepton final state in proton-proton collisions at root s=13 TeV

Peer reviewe