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• For the first time, the ionospheric response to a solar eclipse was observed on a global scale. • Changes in all TEC disturbance parameters depended in a complex manner on relative obscuration area. • Delay time of maximum ionospheric response with respect to maximum eclipse magnitude was 15–25 min. • Duration of ionospheric response to the eclipse exceeded the duration of disturbing source influence. Solar eclipses (SEs) pertain to high-energy sources. They are capable of causing significant disturbances in all geoshells and geophysical fields. Despite the almost century-long history of studying the influence of eclipses on geoshells, the task of observing and analyzing disturbances in them remains relevant. This is explained by the fact that the response of the media significantly depends on the state of atmospheric and space weather, the location and time of observation, the SE magnitude, etc. The aim of this paper is to present the results of a statistical analysis of the features of the total electron content (TEC) variations during the October 25, 2022 SE from high to low latitudes in the Euro-Asian region. Data from Global Navigation Satellite System were used for the analysis. The error in estimating TEC in the vertical column did not exceed 0.1 TECU. For the first time, the response of the ionosphere to an SE has been studied on a global scale (from the Reykjavik station to the Novosibirsk station) using methods of statistical analysis, including the time moments after sunset. The decrease in TEC reached 1.0–19.0 TECU, and the relative decrease was approximately –0.32. Changes in all TEC disturbance parameters depended in a complex manner on the relative obscuration area of the solar disk. This can be explained by non-monotonic changes in electron density during the daytime, by the intensification of the ionosphere–plasmasphere coupling, the disturbance of the ionospheric current system, vertical plasma drift in crossed electric and magnetic fields, as well as the generation of wave disturbances during the SE period. The delay time of the maximum ionospheric response (maximum |δ V | value) with respect to the maximum magnitude of the eclipse was 15–25 min. The duration of the ionospheric response to the SE slightly exceeded the duration of the perturbing source influence. [ABSTRACT FROM AUTHOR]

This paper discusses earthworm (Lumbricidae) populations inhabiting forb–fern pine forests and fern birch–aspen forests prevailing in the forest-steppe belt of the Ob River region (Novosibirsk oblast) in relation to the forest mosaic. A detailed analysis of the structure of earthworm complexes has made it possible to identify individual species and living forms biotopically confined not only to certain forest types, but to forest microsites as well. Pine forests are mostly predominated by Asian earthworm species, while birch–aspen forests are mostly predominated by cosmopolitans. Differences between earthworm populations inhabiting various microsites in population density and biomass are more pronounced in forest openings than in undercrown and intercrown spaces, especially in pine forests. An analysis of earthworm populations inhabiting fallen deadwood has made it possible to identify distinctive features of their structure: in pine forests, incomplete deadwood earthworm complexes complement soil earthworm complexes; in birch–aspen forests, fallen deadwood represents a distinct microsite with a fully featured earthworm complex. [ABSTRACT FROM AUTHOR]

This paper is a tribute to an internationally renowned scientist, Prof. Fedor A. Kuznetsov with several noteworthy contributions to his credit. He had played a key role in strengthening Indo-Russian collaboration in science and technology. The author had the privilege of actively pursuing several joint R&D projects. My laboratory had received an advanced Crystal Growth system developed at the Institute of Inorganic Chemistry, Novosibirsk. Several scientists of this institute had been our guests and published jointly authored research papers. Some results of important investigations carried out in author′s group are described. [ABSTRACT FROM AUTHOR]

In this paper, we study the anisotropic near surface with seismic refraction surveying and electrical resistivity tomography. We present a field data processing case study and show a significant dependence of the determined P‐ wave velocity and electrical resistivity on the acquisition line direction. We show that the anisotropy influences not only the determined velocities themselves, but also the estimated depths of the determined boundaries and can cause misinterpretation of the arrival time curves and lead to hidden layer issues. We justify our field data‐processing results with ray modelling and synthetic data processing. As a result of our case study, we suggest a consistent direction of anisotropy for electrical resistivity and seismic surveying for the particular site in the Novosibirsk region. [ABSTRACT FROM AUTHOR]

Featured Application: Surface plasmon refractometry of conducting surfaces applied in terahertz plasmonic integrated circuits and communication lines. With the intensive development of data transmitting and processing devices in the terahertz (THz) frequency range, an important part of which are integrated plasmonic components and communication lines, it becomes necessary to measure correctly the optical constants of their conductive surfaces. In this paper, we describe a reliable method for determining the effective permittivity εm of a metal surface from the measured characteristics (refractive and absorption indices) of THz surface plasmon polaritons (SPPs). The novelty of the method is the conduction of measurements on a metal surface with a dielectric layer of subwavelength thickness, suppressing the radiative losses of SPPs, which are not taken into account by the SPP dispersion equation. The method is tested on a number of flat "gold sputtering–zinc sulfide layer–air" structures with the use of the THz radiation (λ0 = 141 μm) from the Novosibirsk free electron laser (NovoFEL). The SPP characteristics are determined from interferograms measured with a plasmon Michelson interferometer. It is found that the method allows a significant increase in the accuracy of the εm in comparison with measurements on the same metal surface without a dielectric layer. [ABSTRACT FROM AUTHOR]

The characteristics of high-power vortex Bessel beams in the terahertz range ( λ = 141 μm) obtained with the use of diffractive axicons (DAs) illuminated by a Gaussian beam of the Novosibirsk free-electron laser were studied. Two of the three possible types of DA recently described in our previous paper, namely, binary spiral silicon axicons (BAs), forming beams with a topological charge l equal to 0–4 and 9, and a diamond "holographic" axicon (HA), forming a beam with l = 9 , were used in the experiments. These axicons formed beams whose cross sections in the region of inner Bessel rings were close to those of ideal Bessel beams, but their intensities varied in azimuth with a frequency of l and 2 l for the BAs and HA, respectively. However, in the case of the BAs, the beams had a pronounced helical structure at the periphery, whereas for the HA, the beam was axisymmetric. By focusing these beams with a lens, we studied the structure of the so-called "perfect" beams (PBs). While an ideal Bessel beam exhibits a PB as a thin ring, in the case of the BAs, we observed a broadened ring structure consisting of 2 l short spirals, and for the HA, we observed a narrow ring with 2 l maxima in azimuth. A comparison of the numerical calculations and experiments showed that the observed azimuthal intensity variations can be attributed to inaccuracies in the preparation of the axicon relief and/or discrepancies between the calculated and actual wavelengths, within a few percent. The results of this work enable the establishment of quality requirements for axicon manufacture and the appropriate selection of the axicon type in accordance with the requirements for the beam. [ABSTRACT FROM AUTHOR]

The optical scheme and technical characteristics of terahertz planar Michelson interferometer based on surface plasmons are presented. A technique for determination of the complex index of refraction of surface plasmons () from interferograms is described. The paper presents the results of test measurements on flat surfaces with gold sputtering coated by ZnS layers 0 to 3 μm thick with application of the high-power coherent radiation from the Novosibirsk free electron laser at the wavelength λ0 = 141 μm. From the measurement results, the value of the effective permittivity of the sputtered gold surface was found, which turned out to be an order of magnitude lower than that of crystalline gold. Analysis of the energy losses in the plasmonic interferometer made it possible to estimate its dynamic range (106–108 in terms of radiation power) required for measurements on samples with different . Ways to increase the signal-to-noise ratio via optimization of the elements of the optical scheme and detector have also been proposed. [ABSTRACT FROM AUTHOR]

This paper considers the use of radar and optical data from the Sentinel 1 and Sentinel 2 satellites for 2019–2020 to assess the humus content and the percentage of clay and moisture in the topsoil using the example of chernozems and gray forest soils of the Novosibirsk oblast. Particular attention is paid to the selection of satellite images, because in order to quantify the humus content and clay in the soil, it is necessary to fulfill the conditions for the soil to be dry and bare. The humus content is estimated for five test sites based on a regression model (Karavanova and Orlov, 1996), which includes surface reflection coefficients at the wavelength of the B6 spectral channel of the Sentinel 2 satellite. The model parameters are adjusted for the conditions of the study area separately for chernozems and gray forest soils. The percentage of physical clay in the soil is estimated using Sentinel 2 optical data, ground measurements, and regression models with an exponential dependence of clay content on soil reflectances at the SWIR wavelengths of the Sentinel 2 spectral channels (Bousbih et al., 2019; Shabou et al., 2015). The change in the percentage of humus and clay content in the test sites of soils over the year is shown according to Sentinel 2 data. The topsoil moisture content is estimated based on radar, optical, and the combined use of radar and optical data. [ABSTRACT FROM AUTHOR]

The paper presents the results of radiocarbon (14C) concentration measurements in tree rings in the vicinity of Kursk NPP (Russia) with four operating RBMK reactors. The sampling was carried out from the site with the highest expected accumulation of radiocarbon in vegetation. The site was determined with long-term meteorological data. The measurements of 14C concentration carried out with accelerator-mass spectrometer in Budker Institute of Nuclear Physics, Novosibirsk, Russia. The obtained results demonstrated the influence of exploitation of Kursk NPP to the concentration of 14C in tree rings. Based on the equilibrium between the 14C ratio in the tree rings and the surrounding air, retrospective estimates of the radiocarbon discharge and effective doses were made. Effective doses were calculated with two approaches: IAEA methodology and less conservative approach, considering the real food consumption in the Kursk region. The values of calculated doses by the second method (0.08–2.58 μSv) are more than 2 times less than IAEA approach (0.17–5.30 μSv). The highest difference between measured and background 14C in tree ring is 41.7 ± 5.8 pMC in 2014 during the restoration of graphite stack. The main contribution to 14С exposure in the considering period is caused by background – from 70 to 99%. [ABSTRACT FROM AUTHOR]

Earlier, a method for constructing an initial approximation for solving the inverse problem of acoustics by a gradient method based on a convolutional neural network trained to predict the distribution of velocities in a medium from wave response was proposed [9]. It was shown that the neural network trained on responses from simple layered media can be successfully used for solving the inverse problem for a significantly more complex model. In this paper, we present algorithms for processing data about epidemics and an example of applying a neural network for modeling the propagation of COVID-19 in Novosibirsk region (Russia) based only on data. A neural network NN-COVID-19 that uses data about the epidemics is constructed. It is shown that this neural network predicts the propagation of COVID-19 for five days by an order of magnitude better than SEIR-HCD. When a new variant (Omicron) appeared, this neural network was able to predict (after retraining) the propagation of the epidemics more accurately. Note that the proposed neural network uses not only epidemiological data but also social ones (such as holidays, restrictive measures, etc.). The proposed approach makes it possible to refine mathematical models. A comparison of the curves constructed by SEIR-HCD model and by the neural network shows that the plots of solutions of the direct problem almost coincide with the plots constructed by the neural network. This helps refine coefficients of the differential model. [ABSTRACT FROM AUTHOR]

The Journal of Integrative Bioinformatics has published a document titled "BGRS: bioinformatics of genome regulation and data integration." The document discusses the importance of gene expression regulation in bioinformatics development and highlights the databases and tools that have been developed for studying transcription factor regulation. The document also reviews current trends in bioinformatics of gene expression based on the material discussed at the BGRS\\SB conference held in Novosibirsk. The conference covers various topics including genomics, transcriptomics, systems biology, and computational plant biology. The document emphasizes the need for collaboration in bioinformatics research and mentions emerging topics such as COVID-19 studies and Big Data in medicine. The next BGRS meeting is scheduled for 2024. [Extracted from the article]

In this paper, we describe the project of a photon source with energies up to 2500 MeV at the SKIF synchrotron radiation facility (under construction in Novosibirsk). It is intended for experiments on photonuclear reactions, nonlinear QED, EM detector calibration and other applications. A polarized photon beam with a flux of 106–108 Hz (in full spectrum) is produced using Compton backscattering (or inverse scattering) of IR, visible, and UV laser radiation, as well as the UV band of its own synchrotron radiation, on the SKIF electron beam (15 kHz). Spectrum monochromatization with collimators or/and tagging system by recoil electrons is possible. The discrepancy between experimental and theoretical photofission cross sections of actinide nuclei in a photon energy range of hundreds of MeV has been known since the 1980s, so it is proposed to study these cross sections in the first series of experiments. [ABSTRACT FROM AUTHOR]

The human adenovirus (HAdV) is a common pathogen in children that can cause acute respiratory virus infection (ARVI). However, the molecular epidemiological and clinical information relating to HAdV among hospitalized children with ARVI is rarely reported in Russia. A 4-year longitudinal (2019–2022) study among hospitalized children (0–17 years old) with ARVI in Novosibirsk, Russia, was conducted to evaluate the epidemiological and molecular characteristics of HAdV. Statistically significant differences in the detection rates of epidemiological and virological data of all positive viral detections of HAdV were analyzed using a two-tailed Chi-square test. The incidence of HAdV and other respiratory viruses such as human influenza A and B viruses, respiratory syncytial virus, coronavirus, parainfluenza virus, metapneumovirus, rhinovirus, bocavirus, and SARS-CoV-2 was investigated among 3190 hospitalized children using real-time polymerase chain reaction. At least one of these respiratory viruses was detected in 74.4% of hospitalized cases, among which HAdV accounted for 4%. A total of 1.3% co-infections with HAdV were also registered. We obtained full-genome sequences of 12 HAdVs, which were isolated in cell cultures. Genetic analysis revealed the circulation of adenovirus of genotypes C1, C2, C5, C89, and 108 among hospitalized children in the period from 2019–2022. [ABSTRACT FROM AUTHOR]

In this paper, a universal method has been developed to determine the price of a hydro resource (one cubic meter) for the operational regulation of a hydropower plant (HPP), which is a combination of an optimization method and a method for assessing the marginal utility. The proposed approach is based on the correct representation of differential incremental rate characteristics of water at an HPP and fuel at a thermal power plant (TPP). To know the price of a hydro resource used for electricity generation at a hydropower plant. This gives the possibility to increase the efficiency of management both at a hydropower plant, and in a water utilization system as a whole. Using the examples of Novosibirsk HPP, it is expected to develop an estimation of economic effect from the implementation of the developed criteria, the proposed method of the calculation of a hydro resource price at HPP, and the method of separating fuel costs at CHPP. As a result of the implementation the developed method for the HPP, a price of electricity sold in the flexible energy market will be compared to the price of the electricity produced and sold at CHPP, being equal to approximately 330 rubles/MW h. [ABSTRACT FROM AUTHOR]

Investigating the relationship between alcohol consumption and physical performance, we used data from the 2015–2018 Know Your Heart study on 4215 adults aged 35–69 from Arkhangelsk and Novosibirsk, Russia. We classified participants' drinking status into non-drinking, non-problem drinking, hazardous drinking, and harmful drinking based on their self-reported drinking behaviors. To evaluate physical performance, we developed a Composite Physical Performance Scale (CPPS), which combined the results of three functional tests: grip strength (GS), closed-eyes balance, and chair rises (CR). We applied multivariable linear regression to assess the relationship between alcohol consumption and CPPS score, and ordinal logistic regression to explore the associations between alcohol consumption and the three functional tests separately. The results showed that harmful drinking was associated with lower CPPS scores compared to non-problem drinking. Among harmful drinking men, the decrease in CPPS scores was explained by all three tests equally and exceptionally by GS among women. Non-drinking was also associated with decreased CPPS, linked to lower GS and CR scores in men, and only lower GS scores in women. The study revealed a reduced physical performance in the non-drinking and harmful drinking groups compared to non-problem drinking. [ABSTRACT FROM AUTHOR]

The development of efficient and reliable sensors operating at room temperature is essential to advance the application of terahertz (THz) science and technology. Pyroelectric THz detectors are among the best candidates, taking into account their variety, outstanding performance, ease of fabrication, and robustness. In this work, we compare the performance of six different detectors, based on either LaTiO3 crystal or different polymeric films, using monochromatic radiation of the Novosibirsk Free Electron Laser facility (NovoFEL) in the frequency range of 0.9–2.0 THz. The main characteristics, including noise equivalent power and frequency response, were determined for all of them. Possible reasons for the differences in the obtained characteristics are discussed on the basis of the main physicochemical characteristics and optical properties of the sensitive area. At least three detectors showed sufficient sensitivity to monitor the shape and duration of the THz macropulses utilizing only a small fraction of the THz radiation from the primary beam. This capability is crucial for accurate characterization of THz radiation during the main experiment at various specialized endstations at synchrotrons and free electron lasers. As an example of such characterization, the typical stability of the average NovoFEL radiation power at the beamline of the electron paramagnetic resonance endstation was investigated. [ABSTRACT FROM AUTHOR]

The development of highly sensitive diagnostic systems for the early revelation of diseases in humans is one of the most important tasks of modern biomedical research, and the detection of the core antigen of the hepatitis C virus (HCVcoreAg)—a protein marker of the hepatitis C virus—is just the case. Our study is aimed at testing the performance of the nanoribbon biosensor in the case of the use of two different types of molecular probes: the antibodies and the aptamers against HCVcoreAg. The nanoribbon sensor chips employed are based on "silicon-on-insulator structures" (SOI-NR). Two different HCVcoreAg preparations are tested: recombinant β-galactosidase-conjugated HCVcoreAg ("Virogen", Watertown, MA, USA) and recombinant HCVcoreAg ("Vector-Best", Novosibirsk, Russia). Upon the detection of either type of antigen preparation, the lowest concentration of the antigen detectable in buffer with pH 5.1 was found to be approximately equal, amounting to ~10−15 M. This value was similar upon the use of either type of molecular probes. [ABSTRACT FROM AUTHOR]

To teach English as a second foreign language at university levels provides the educator or professor an excellent occasion to compare the first and second languages by a series of analogical activities that not only highlight the similar forms and structures of them, but more important still, oblige students to comprehend these forms and structures without having either to rely on or depend upon their mother tongue or apprehend them through the prism of their own. In this article are compared Turkish, French and Chinese forms and structures with English through sets of analogical activities that I prepared and applied in classrooms with my Russian students studying the aforesaid languages at the University of Academgorodok near Novosibirsk in Siberia. It was my methodical experiment to bring together English/Turkish, English/French and English/Chinese as interrelated objects of study; to put into relief the interpenetrating analogical elements that these languages possess as a pedagogical approach to them in spite of their very different language families and distinctive structural and morphological features. [ABSTRACT FROM AUTHOR]

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The problem of identification of unknown epidemiological parameters (contagiosity, the initial number of infected individuals, probability of being tested) of an agent-based model of COVID-19 spread in Novosibirsk region is solved and analyzed. The first stage of modeling involves data analysis based on the machine learning approach that allows one to determine correlated datasets of performed PCR tests and number of daily diagnoses and detect some features (seasonality, stationarity, data correlation) to be used for COVID-19 spread modeling. At the second stage, the unknown model parameters that depend on the date of introducing of containment measures are calibrated with the usage of additional measurements such as the number of daily diagnosed and tested people using PCR, their daily mortality rate and other statistical information about the disease. The calibration is based on minimization of the misfit function for daily diagnosed data. The OPTUNA optimization framework with tree-structured Parzen estimator and covariance matrix adaptation evolution strategy is used to minimize the misfit function. Due to ill-posedness of identification problem, the identifiability analysis is carried out to construct the regularization algorithm. At the third stage, the identified parameters of COVID-19 for Novosibirsk region and different scenarios of COVID-19 spread are analyzed in relation to introduced quarantine measures. This kind of modeling can be used to select effective anti-pandemic programs. [ABSTRACT FROM AUTHOR]

Avian coronaviruses (ACoV) have been shown to be highly prevalent in wild bird populations. More work on avian coronavirus detection and diversity estimation is needed for the breeding territories of migrating birds, where the high diversity and high prevalence of Orthomyxoviridae and Paramyxoviridae have already been shown in wild birds. In order to detect ACoV RNA, we conducted PCR diagnostics of cloacal swab samples from birds, which we monitored during avian influenza A virus surveillance activities. Samples from two distant Asian regions of Russia (Sakhalin region and Novosibirsk region) were tested. Amplified fragments of the RNA-dependent RNA-polymerase (RdRp) of positive samples were partially sequenced to determine the species of Coronaviridae represented. The study revealed a high presence of ACoV among wild birds in Russia. Moreover, there was a high presence of birds co-infected with avian coronavirus, avian influenza virus, and avian paramyxovirus. We found one case of triple co-infection in a Northern Pintail (Anas acuta). Phylogenetic analysis revealed the circulation of a Gammacoronavirus species. A Deltacoronavirus species was not detected, which supports the data regarding the low prevalence of deltacoronaviruses among surveyed bird species. [ABSTRACT FROM AUTHOR]

Subfossil remains of insects and branchiopod crustaceans (Cladocera and Notostraca) found in three late Pleistocene deposits in the Novosibirsk region in the vicinity of the village of Suzun have been described. The calibrated radiocarbon dates for these deposits were 24,893–25,966 cal BP (Suzun-1), 20,379–20,699 cal BP (Suzun-2), and 27,693–28,126 cal BP (Nizhny Suzun), which correspond to the onset of marine isotope stage 2 (MIS 2). The insect assemblages of these deposits are mainly represented by Coleoptera, which are noteworthy for high taxonomic and ecological diversity. At least 194 beetle species from 21 families have been found altogether. Of them, 74 species were found in the Pleistocene deposits of Western Siberia for the first time. All deposits were similar in species composition of beetles; Carabidae and Curculionidae prevailed everywhere. The ecological composition was dominated by steppe and tundra-steppe species; aquatic and riparian groups were also well represented. The Cladoceran and notostracan taxa revealed in Suzun-1 and Suzun-2 are characteristic of recent steppes rather than the forest zone of Western Siberia. The studied entomocomplexes are congruent with the periglacial "Otiorhynchus-type" fauna that inhabited the southern part of the West Siberian Plain at the end of the Pleistocene and had no close contemporary analogues. Cold and dry conditions, as well as the prevailing open landscapes of the tundra-steppe type, were the reconstructed conditions for this fauna. At the same time, the Suzun-1 and Suzun-2 entomocomplexes had a distinctive feature, namely a high proportion of forest species associated with both coniferous and deciduous trees. According to these data, at the beginning of MIS 2 in the Upper Ob region, spruce forests with the participation of small-leaved species (birch) were present. They were probably confined to river valleys and were not widely distributed. [ABSTRACT FROM AUTHOR]

Paeonia obovata and Paeonia oreogeton belong to the monotypic family Paeoniaceae. Both are popular as ornamental plants. P. obovata and P. oreogeton have been introduced into Novosibirsk Oblast (Western Siberia) from Primorye (Far East). The aim of the study was to assess their adaptability as well as the effect of seasonal developmental stages on the accumulation of secondary metabolites and reserve substances in the leaves and rhizomes under the conditions of Akademgorodok (Novosibirsk, Russia). According to long-term data (15 years), P. obovata and P. oreogeton complete the entire growth cycle here, including flowering and fruiting. Both species exhibited abundant flowering, but in the first 3 years, P. oreogeton did not bloom; yet under the microclimatic conditions specifically selected for this species (a more shaded area), it started to bloom and fruit yearly. A biochemical analysis (by spectrometric method) of P. obovata and P. oreogeton grown in Akademgorodok showed that the leaves accumulate higher concentrations of flavonols (P. obovata: 1.77%), tannins (P. oreogeton: 16.42%), ascorbic acid (P. oreogeton: 155.2 mg/100 g), and sugars (P. obovata: 20.85%) as compared to the roots. Peony rhizomes contain higher concentrations of protopectins (P. oreogeton: 13.03%), saponins (P. obovata: 21.06%), and starch (P. obovata: 30.20%) than the leaves do. These data can help to increase the levels of these natural compounds in these species. Further investigation into the dynamics of accumulation of biologically active substances in the organs of peonies will help to identify introduced plant species having high biochemical potential for the pharmaceutical industry. [ABSTRACT FROM AUTHOR]

This article discusses the use of multispectral data from Landsat 8, Sentinel 2, Aqua, and Terra satellites for monitoring the environment in areas of open-pit coal mines in the Iskitimsky district of Novosibirsk oblast for 2013–2020. The dynamics of changes in the values of the reflection coefficient (CR) from the surface and water bodies, the snow index NDSI during the snowmelt period, and the change in NDVI in summer are shown. The dynamics of changes in the aerosol optical depth (AOD) (aerosol optical thickness (AOT)) of CO and CH4 values in the atmosphere of the Iskitimsky district is shown using the Giovanni data analysis and visualization system. A satellite assessment of the state of the atmosphere revealed seasonal changes in the AOD with maximum values in April and July. It is shown that the highest concentrations of carbon monoxide in the atmosphere are observed in the winter months, as well as in the spring of March and April. A stable decrease in the concentration of carbon monoxide in the atmosphere over 7 years from 2014 to 2020 with a determination coefficient of R2 = 0.95 and an increase in the concentration of methane with a determination coefficient of R2 = 0.89 are shown. [ABSTRACT FROM AUTHOR]

We aimed to analyze the profile of glucose lowering therapy (GLT) in persons with diabetes mellitus type 2 (DM2) in an aging Russian population. A random population sample (n = 3898, men/women, 55–84) was examined in Novosibirsk, during 2015–2018 (HAPIEE Project). The design of the present work is a cross-sectional study. DM2 was defined in those with a history of DM2 receiving GLT, or at a level of fasting plasma glucose (FPG) ≥7.0 mmol/L. The entire DM2 group was included in the analysis (n = 803); of these, 476 persons were taking GLT and were included in the analysis at stage 2. Regular GLT medication intake for 12 months was coded with ATC. In studied sample, the prevalence of DM2 was 20.8%. Among subjects with DM2, 59% of individuals received GLT, 32% did not. Glycemic control (FPG < 7.0 mmol/L) was achieved in every fifth participant with DM2 (35% in those receiving GLT). In frequency of GLT use, biguanides ranked in first place (75%), sulfonylurea derivatives in second (35%), insulins in third (12%), and iDPP-4 in fourth (5%). Among those receiving GLT, 24% used combined oral therapy, and 6% used insulin-combined therapy. In conclusion, in a population sample aged 55–84 examined in 2015–2018, glycemic control was achieved in every fifth participant with DM2, and in every third participant receiving GLT. The proportion of participants using new GLT drugs was small, and there was a lack of HbA1c monitoring for intensive glycemic control. [ABSTRACT FROM AUTHOR]

Russian regional governments have shown remarkable variation in prohibiting immigrants from working in specific economic sectors. Why do regions enact immigration bans in some sectors but not in others? Few studies have explored the politics of immigration in authoritarian regimes, and recent sectoral bans in Russia have received scant attention. Based on an analysis of a novel data set on sectoral bans in 83 Russian regions and a case study of Novosibirsk Oblast, this article shows that regional governments tend to enact immigration bans in sectors that do not rely on a foreign workforce. I argue that autocrats impose immigration restrictions as mere grandstanding to appeal to public anti-immigrant sentiment. My findings challenge the existing literature's emphasis on the roles of economic factors, such as economic growth and natural resources, in immigration restrictions, as well as the argument that Russia imposes excessive immigration restrictions. [ABSTRACT FROM AUTHOR]

We present an overview of the beginning and early years of radiocarbon dating in Russia. Achievements of several major scholars in this field from Leningrad (St. Petersburg), Moscow and Novosibirsk are briefly described. The existing and closed Russian laboratories are also mentioned. [ABSTRACT FROM AUTHOR]

The famous Steinberg's conjecture states that planar graphs without cycles of lengths 4 and 5 are (0 , 0 , 0) -colorable. Recently, Cohen-Addad et al. [6] demonstrated that Steinberg's conjecture is false by constructing a counterexample. Let F denote the family of planar graphs without 3-cycles adjacent to cycles of lengths 3 and 5. Borodin et al. posed the Novosibirsk 3-color conjecture, which is the statement that every graph in F is (0 , 0 , 0) -colorable. It is easy to observe that the counterexample of Cohen-Addad et al. shows also that if G ∈ F , then G is not always (0 , 0 , 0) -colorable. Motivated by this observation, this paper proves that every member G ∈ F is (1 , 1 , 0) -colorable, which is a positive step. [ABSTRACT FROM AUTHOR]

Simple Summary: In the south of western Siberia (Russia), there are many unique and unexplored lakes. This work focused on Lake Solenoe, a component of a poorly studied lake system in the south of western Siberia. The diversity of microorganisms of Lake Solenoe was evaluated in the floating community and in the bottom sediments. The aim was to assess the metabolic potential of this lake ecosystem and to describe the identified relations between the mineral and living components. This is the first detailed study on the microbial diversity, its metabolic potential, and their relations with a series of geochemical parameters in the lake ecosystem of Novosibirsk Oblast. In the south of western Siberia (Russia), there are many unique and unexplored soda, saline, and freshwater lakes. In this study, the results are presented on microbial diversity, its metabolic potential, and their relation with a set of geochemical parameters for a hypersaline lake ecosystem in the Novosibirsk region (Oblast). The metagenomic approach used in this work allowed us to determine the composition and structure of a floating microbial community, the upper layer of silt, and the strata of bottom sediments in a natural saline lake via two bioinformatic approaches, whose results are in good agreement with each other. In the floating microbial community and in the upper layers of the bottom sediment, bacteria of the Proteobacteria (Gammaproteobacteria), Cyanobacteria, and Bacteroidetes phyla were found to predominate. The lower layers were dominated by Proteobacteria (mainly Deltaproteobacteria), Gemmatimonadetes, Firmicutes, and Archaea. Metabolic pathways were reconstructed to investigate the metabolic potential of the microbial communities and other hypothetical roles of the microbial communities in the biogeochemical cycle. Relations between different taxa of microorganisms were identified, as was their potential role in biogeochemical transformations of C, N, and S in a comparative structural analysis that included various ecological niches. [ABSTRACT FROM AUTHOR]

Multifrequency EPR spectroscopy provides detailed information on radicals and radical pairs occurring in photochemical reactions. An important example is spin polarization delivering information about the structure, motional dynamics, and spin-controlled chemistry of transient doublet- and triplet-state radicals as well as radical pairs in disordered systems. To illustrate this, we report here on EPR and ENDOR experiments of UV-irradiated quinone and ketone compounds in liquid alcohol solutions that exhibit pronounced electron and nuclear spin polarization effects (CIDEP and CIDNP, respectively). These experiments were performed jointly by members of the Möbius group from Berlin and Renad Sagdeev from Novosibirsk, when he visited the Department of Physics of Free University Berlin back in 1983. Over the years, this initial Berlin-Novosibirsk cooperation developed into a collaboration of six groups located in Novosibirsk, Kazan, Moscow, Bologna, Berlin, and Mülheim (Ruhr), recently augmented by a seventh group in Dortmund. The efforts are focused on light-induced electron transfer in donor-acceptor complexes in natural and artificial photosynthesis, i.e., processes that are functionally controlled by weak cofactor-matrix hydrogen bonds. These processes require advanced multifrequency and multiresonance EPR techniques to be characterized. [ABSTRACT FROM AUTHOR]

The main methods for measuring 14C based on a Libby counter, a proportional gas-filled counter, liquid scintillation counting, and accelerator mass spectrometry are considered. The measurement features, advantages, and disadvantages of each presented method are described. The radiocarbon concentration in annual rings of a pine tree grown in Akademgorodok of Novosibirsk has been measured using the accelerator mass spectrometry method. The measured 14C concentration in the samples is in the range from 95.4 ± 0.2 to 191.5 ± 2.2 pMC. [ABSTRACT FROM AUTHOR]

This study analysed the temperature and humidity properties of urban soils in the territory of the Mikhailovskaya Embankment Park of Culture and Recreation in Novosibirsk, Russian Federation, in the cold period of the 2018–2019 hydrological year. Data on the temperature of the air and soil at various depths, winter and spring soil moisture and data on the dynamics of snow accumulation and snow distribution were analysed. This study found that, despite high levels of humidity in the autumn and the high snow reserves that accumulated during the winter, a decrease in soil moisture content was observed after the snow had melted. Temperatures in the range of −3 to −7 °С were recorded in the layer of soil from 0 to 30 cm below the ground surface. Systematic clearing of the pedestrian zones of the park of snow during the winter leads to both an increase in snow height and, accordingly, water reserves in the snow in adjacent areas, and to exposure of the surfaces of rabattes, or cement subterranean garden beds, in which perennial ornamental plants are grown. This study also revealed the presence of an additional cooling effect within these rabattes on the temperature regime of the soils within them during the cold period. [ABSTRACT FROM AUTHOR]