South Urals Research Articles

Quality evaluation of lawn grasses turf in the urbanized territories of the Southern Ural

The paper presents the research materials devoted to studying the mixtures of lawn grasses when creating a recreational zone in the urbanized territory of the Chelyabinsk region. We considered the possibility of creating the qualitative indicators of perennial grasses turf by improving their cultivation technology. The article deals with testing soil properties and improving the technology of growing perennial grasses, and quality evaluation of turf in the urbanized territories of the South Ural. The paper aims to (1) conduct the analysis based on the use of grasses for landscaping lawns, (2) determine the types of grasses that are most in demand for the infrastructure development of urbanized areas at present and to identify their biological characteristics, (3) select soil samples according to the variants of the experiment and to carry out their agrochemical analysis, (4) study the types of grasses, their nutritional requirements, watering rate, mowing periods by phases of organogenesis, and (5) examine the turf quality of perennial grasses mixture and to evaluate them according to the variants of experiments, (6) identify the seed mixture of two different species (bent grass + fescue with bluegrass + fescue).

New Radiolarian Species from the Lower Carboniferous of the Volga–Ural Basin and the Upper Carboniferous of the South Urals of Russia

The genus Triaenosphaera Deflandre, 1973 is revised and its diagnosis is emended. Four new radiolarian species from the Lower Tournaisian (Mississippian) of the Volga–Ural Basin and the Upper Kasimovian (Pennsylvanian) of the South Urals are described: Entactinia zaitsevae sp. nov., Triaenosphaera fortunatovae sp. nov., T. spiroacus sp. nov. and Spongentactinia oraia sp. nov.

Mineral forms of tungsten at the Porokhovskoe and Yugo-Konevskoe deposits (South Urals)

The ore hand specimens and technological ore samples from the Porokhovskoe and Yugo-Konevskoe W greisen deposits in the South Urals are studied. The major W minerals of primary ores at both deposits include hubnerite and scheelite. The secondary and accessory minerals are pyrite, chalcopyrite and molybdenite, rare minerals include sphalerite, galena, bismuthinite, aikinite, unidentifed chalcogenides and sulfosalts, magnetite, rutile, ilmenite, titanite and columbite. The veins are mainly composed of quartz and muscovite with subordinate calcite, dolomite and fuorite, rare chlorite and amphibole and accessory zircon, apatite and uraninite. No zonation in the distribution of wolframite with various Fe content is identifed relative to the Yugo-Konevsky granite pluton, however, wolframite of the Northern area of the Porokhovskoe deposit is enriched in Fe compared to that of the Central area and Yugo-Konevskoe deposit. In addition to veined wolframite and scheelite, the oxidized ores also contain Fe and Mn oxyhydroxides, malachite, pyromorphite and bromargyrite. Tungsten is part of Mn and Fe oxyhydroxides, which replace wolframite and less often sulfdes. The WO3 content of pseudomorphic Mn and Fe oxyhydroxides after hubnerite reaches 18 wt. %. Single grains of stolzite and russellite are found. According to the results of phase chemical analysis of technological samples, the amount of tungstite in oxidized ores is minor, therefore all ores of both deposits were ascribed to primary type. Keywords: South Urals, Porokhovskoe deposit, Yugo-Konevskoe deposit, tungsten, hubnerite, scheelite, stolzite, trace elements.

Polyakov log coarse garnet occurrence in the South Urals

Ontogenic modeling of the origin of coarse garnet of the Polyakov log occurrence (South Urals) in a fne-grained schist sequence allowed the authors to conclude on its metasomatic growth with the replacement of chlorite aggregates. Muscovite, ilmenite, epidote, quartz and apatite remain preserved in the primary schist orientation of individuals. Accessory andesine, cobaltite, pentlandite, pyrrhotite and zircon crystallized together with garnet. The formation of coarse garnet crystals is probably related to fuctuations of supersaturation relative to garnet in areas of schists with abundant chlorite. This allows us to expect the presence of coarse garnet areas in adjacent parts of the schist sequence. Keywords: South Urals, garnet, ontogeny

Погребение «жрицы» из Филипповки: опыт комплексного исследования

The paper addresses chronological issues with burial 2 from kurgan 1 from Filippovka 1 burial ground, a semantic analysis of some uncovered objects of art, as well as the anthropological type/genetic status of the buried woman. Using complex research methods (molecular-genetic, mineralogical, X-ray, technological, traceological analyses, methods of age-sex diagnostics, craniology, multidimensional analysis of principal components and search for archaeological analogies) ensured the authenticity of determining manufacturing techniques and anthropological studies as well as modern ideas about the cultural and chronological interpretation of the presented archaeological materials. A study of horse harness items abd typological attribution of arrowheads and beads made it possible to date the burial within the middle — third quarter of the 4th century BC. The context of items in the burial, the stylistics of their forms and structure convincingly showed that certain items were not used in everyday/social life, but rather served as some sacred attributes used in religious ceremonies and ritual practices only. A search for analogies to the iconography and images from these relics made it possible to clarify the compositional semantics and suggested their purpose in sacred scenarios. The anthropological type distinctive features and genetic structures, as well as the presence of traces of deliberate artificial deformation of the skull, confirm the local, South Ural, origin of the woman.

Nonlinear main components of the cytokine profile in children with community-acquired pneumonia

Cytokines are the key mediators which control and regulate immune and inflammatory responses via complex networks and serve as biomarkers of many diseases. Quantitative determination of cytokines is helpful in assessing immune status and adjusting therapy for various inflammatory diseases, such as sepsis and pneumonia. Since community-acquired pneumonia remains a common cause of childhood morbidity and mortality. At the present stage, prognosis of the disease severity in children is an urgent problem. The aim of our study was to identify associations between cytokine levels in healthy children and in children with community-acquired pneumonia (CAP), depending on the age of patients and severity of the pathological process. The work was carried out at the Department of Microbiology, Virology and Immunology, Department of Propaedeutics of Childhood Diseases and Pediatrics, and at the Research Institute of Immunology at the South Ural State Medical University. The study included 117 children aged 1 to 18 years with radiologically confirmed diagnosis of CAP, either severe or mild degree. The comparison group was composed from 28 healthy children who did not have community-acquired pneumonia, as well as other signs of acute respiratory viral infection at the time of examination, being observed for any chronic disorders. The levels of IL-1β, IFNγ, IL-6, IL-4, IL-10, IL-2, TNFα, IFNλ2 (IL-28A), IFNλ3 (IL-28B), IL-8, MCP-1, IL-17AF, GM-CSF were determined in blood serum by means of ELISA test systems (a “sandwich” technique with peroxidase as an indicator enzyme). For statistical analysis, a multidimensional method was used, i.e., non-linear analysis of the principal components using the CATPCA algorithm. Among the children with CAP, our study revealed a consistent increase of IL-1ß, IL-4, IL-10, IL-2, TNFα, IFNλ2 (IL-28A), IFNλ3 (IL-28B), IL-8, MCP-1, IL-17AF, GM-CSF in blood serum. The highest correlation with severity was shown for IFNλ2 (IL-28A), IFNλ3 (IL-28B) and MCP-1, which may be considered additional biomarkers of the CAP severity. There was also a significant variability of the cytokine profile in healthy children and its significant skewing in pneumonia, especially in severe cases.

Mineral Associations of Concentrates from Gold-Bearing Placers of the Miass Placer Zone (South Urals) and Possible Primary Sources of Gold

Abstract —The placer deposits of the Miass valley in the Southern Urals have been known since the beginning of the 19th century. Over two centuries of mining more than 120 tons of gold have been extracted from alluvial and alluvial–deluvial placers. Despite the industrial significance of this territory, native gold of alluvial deposits is practically unstudied and there is no data on the mineral composition of concentrates. Native gold and heavy fraction minerals from seven placers of the Miass placer zone of deluvial–alluvial and alluvial types were researched. The study of the typomorphic features of native gold and distribution of heavy fraction minerals in loose deposits makes it possible to determine the genetic types of primary sources of placer formation. Chrome-spinel and ilmenite prevail in the concentrates, magnetite, epidote, rutile, titanite, clinopyroxene, hematite, zircon, garnets, and monazite are less common. Chromespinelides of various placers are represented by chromite and subferrichromite, they are characterized by a high average content of Cr2O3 (50.9 wt.%). Chromespinelide chemical composition features show evidence of its penetration into placer sediments from rocks of the ophiolitic association. The composition and morphological features of phosphates of rare earth elements (monazite and xenotime) indicate their metamorphogenic nature and penetration into placers from the Riphean strata. Native gold is characterized by a low degree of roundness. Mineral inclusions in native gold are represented by sulfides, arsenides, bismuthides, cuprous gold, platinoids. Composition of native gold from the Miass River valley placers varies over a wide range. The main admixtures are silver (4.5–23.4 wt.%) and mercury (up to 5.14 wt.%), copper (up to 2.03 wt.%) was noted in several grains. The EBSD study of native gold internal structure showed predominance of primary crystallization structures, a low degree of deformation and growth of gold-rich rims with a fine-grained mosaic structure. Formation of gold-rich rims in gold grains in placers is explained by recrystallization of the most deformed parts of gold during transportation. Placers occurred due to the destruction of primary sources located in the upper reaches of streams or near them, which is confirmed by a low degree of grains’ roundness. The composition of native gold in combination with a set of micro-inclusions indicate the gold–sulfide-quartz type of mineralization of most primary sources.

Origin and Evolution of Ore-Forming Fluids at the Small-Sized Gold Deposits in the Khudolaz Area, Southern Urals

Lode gold deposits are widespread in orogenic belts of various ages and are a valuable gold source, but their genesis remains debatable. The close relationship between native gold and quartz was considered a reason to search for acid-magmatic sources of heat and fluids (i.e., granite intrusions), while small gabbro bodies were often ignored. Six minor gold deposits associated with NE-strike faults were studied in the Khudolaz area of the South Urals (Tukan, Bilyan-Tau, Fazly-Tau, Muildy-Tamak, Alasiya-II and Isyanbet-I). It was established, for the first time, that all of the studied deposits are similar geologically but differ in mineralogical diversity of ore-bearing quartz veins, which is due to the different composition of host rocks and ore-bearing intrusions of the Khudolaz (325–329 Ma, U-Pb) and the Ulugurtau (321 ± 15 Ma, Sm-Nd) ultramafic-mafic complexes. Results of the geochemical study of quartz veins (ICP MS) and their fluid inclusions (microthermometry, gas chromatography) showed that native gold was mostly precipitated at temperatures of 230–330 °C from a low- to moderate-saline (8–12 wt.% NaCl-eq.) H2O–CO2–CH4-bearing fluid, when weakly oxidized or near-neutral conditions, were replaced by reducing ones. No significant differences between barren milky white and ore-bearing brownish quartz veins were defined, which indicates their common formation settings and an impulse pattern of vein injection. The stable pattern of the fluid salinity, along with low hydrocarbon and N2 contents, as well as a narrow range of δ18O values, indicate a prevailing magmatogenic source with a certain influence of host rocks but without the influence of meteoric waters. Based on the presented data, the studied deposits were attributed to the epizonal orogenic type. This study shows the formation of lode gold deposits is possible without the participation of granite massifs.

Taxonomic Structure of Planktonic Protist Communities in Saline and Hypersaline Continental Waters Revealed by Metabarcoding

Saline and hypersaline waters are one of the most peculiar ecosystems of our planet, characterized by extreme life conditions. Despite their worldwide distribution, the diversity and abundance of protist communities in these ecosystems remain poorly studied. Here, we analyze planktonic communities of protists sampled across 38 saline and hypersaline water environments (2–390‰) from arid climatic zones of the South Urals and Crimea in light of environmental data using high-throughput 18S rDNA amplicon sequencing. A total of 9 eukaryotic supergroups, 34 phyla, 104 classes, 184 orders, 315 families and 548 genera have been identified. We revealed significant differences in the taxonomic structure of protist communities depending on salinity, geographic location and pH. The protist communities demonstrated linear regression of richness and diversity and growth of the percentage of unclassified Eukaryota (up to 43%) with the increase in salinity. Centrohelids demonstrated the ability to inhabit a broad range of salinities, up to 320‰, which is four times higher than previously reported. Centrohelid species Pinjata ruminata and Yogsothoth sp. are assumed to be specifically adapted to salinity of 3–210‰. The obtained results provide insight into the taxonomy and diversity of protists in saline and hypersaline environments and highlight the great potential for the discovery of new taxa due to the large number of unclassified 18S rDNA sequences.

Adaptation of the hearing analyzer under vibration noise exposure in volunteers: Ways of prevention

BACKGROUND: The negative effect of impulse noise and vibration when using small arms on the auditory analyzer in athletes is less investigated and justifies the need for an extended study of volunteers with normal hearing. The study of the initial characteristics of the impulse noise and vibration effects of sports weapons on the auditory analyzer will make it possible to determine the early risk factors for the occurrence of high-frequency hearing loss in shooters by the number of shots from sports weapons and the recovery time of auditory function. AIMS: To conduct a comparative analysis of the effect of impulse noise and vibration exposure depending on the technical characteristics of small arms on volunteers with normal hearing and, based on the results obtained, unify the methods of forecasting and prevention. MATERIALS AND METHODS: At the Department of Otorhinolaryngology of the South Ural State Medical University of the Ministry of Health of Russia, 30 fifth-year students were examined following continuous recruitment of volunteers between September 2022 and November 2022. All interviewed participants gave voluntary written consent to participate in the survey and to the test level of impulse noise. Based on the current regulatory documents, all volunteers were surveyed and underwent audiological and vestibulometric studies, the technical characteristics of noise and vibration exposure as a risk factor for the early development of presbycusis were determined, and ways of preventing hearing loss through lifestyle were proposed. RESULTS: The comparative analysis of the influence of impulse noise and vibration effects showed a dependence on the weight of the small arms cartridge, number of shots, and adaptation time of the auditory analyzer in volunteers with normal hearing considering the changes in the high-frequency spectrum of increasing audiometry thresholds from the average value of indicators. CONCLUSIONS: The use of active explanatory propaganda among young people on a careful attitude to the physiological state of the cochleovestibular apparatus avoids the risk of early presbycusis development.

Mineral assemblages of the Shishim mine in the Southern Urals

Mineralogy and petrography of complex rocks in area of the Shishim mine in the South Urals is studied. Various skarn assemblages with dominant pyroxene, garnet, vesuvianite, monticellite, chlorite and epidote are developed after gabbroids and granitoids. The formation of skarns was accompanied by the formation of carbonatite and chloritolite dikes, as well as bodies of carbonatite-pegmatites and chloritolite-pegmatites. The rock-forming minerals are refined, secondary and accessory minerals of rocks are studied including allanite, anhydrite, apatite, baddeleyite, barite, calcirtite, perovskite, valleriite, zircon, and zirconolite. Keywords: skarns, carbonatites, chloritolites, Southern Urals.

Assessment Of COVID-19 Pandemic-Related Detrimental Impact On The Population Of Nuclear City: Two-Year Results

Background — Since the announcement of the global coronavirus infection disease (COVID-19) pandemic, the attempts to assess the pandemic-related detrimental impact are of particular interest. The methodology of assessing the overall mortality attributed to COVID-19 pandemic, unlike the use of specific indicators that are sensitive to different methods of accounting the number of infected and deaths, provides more clear understanding of the pandemic-related impact. Objective — Quantitative assessment of the pandemic-related detrimental impact caused by the novel coronavirus infection in a small nuclear city, which is relevant for evaluating the effectiveness of anti-epidemic measures. Methods and Results — The population changes in a small urban district located in the South Ural Region of the Russian Federation were retrospectively analyzed for the decade, based on the open-source demographic data. The pandemic-related detrimental impact was calculated as overall excess mortality rate, compared with the previous non-pandemic years by using the additive model of excess absolute risk. The number of absolute excess deaths, adjusted for gender, age, population size, and number of diseased, was modeled using multivariate linear regression. The pandemic-related detriment was calculated based on the number of predicted excess deaths attributed to COVID-19. The relationship between the total number of deaths and the number of COVID-19 cases was analyzed. The total predicted two-year excess of pandemic-related deaths was 557.9. The pandemic-related total excess mortality per 1,000 patients infected with SARS-Cov-2 was 50.2 (95% CI 38.4; 62.0). Conclusion — The analyses revealed significant impact of the COVID-19 pandemic on the overall excess mortality in the nuclear city population in 2020 and 2021 implemented in both direct and indirect way. The population size was a major significant risk factor confounding the overall mortality. In order to develop an effective strategy to control and prevent the consequences of a pandemic, further monitoring of the epidemic situation in a nuclear city is required.

Structure of the South Urals and cis-Uralian foredeep as revealed by interpretation of regional seismic data and the origin of the prolific of oil reserves in the Volga Urals Basin

Structure of the South Urals and cis-Uralian foredeep as revealed by interpretation of regional seismic data and the origin of the prolific of oil reserves in the Volga Urals Basin

Abzakovo hoard of the Bronze Age in the Bashkir Trans-Urals

The paper is concerned with the results of the study of a hoard of bronze sickles discovered in 1970 in Bai-maksky District of Bashkortostan. Originally, it comprised 13 items, but as of today three of them have got lost, and the collection numbers to only 10 sickles reposited in the National Museum of the Republic of Bashkortostan. It stands out that the items are lacking clear traces of use. Over the past 50 years, materials of the complex have not received sufficient coverage in the scientific literature, despite the rarity of this category of finds for the South Urals region in general, and for the territory of Bashkortostan in particular. This paper constitutes the first publica-tion which combines and refines information about the hoard available in the scientific literature; it also provides a description of each item with updated and further detailed data on their parameters (length, width, thickness, bending height, etc.). In addition, the paper introduces in the scientific discourse photographic images of the bronze objects of the complex, which have been absent until now, instead of rather schematic drawings. Revisi-ting the materials of the hoard allowed it to observe that the data which was available in the literature had some inaccuracies, associated primarily with the parameters of the objects, the study of which helped clarify and extend the information on the description of the sickles remaining to date. The analysis of the material shows that the considered set of reaping tools has some analogies originating from the Bronze Age sites of the Trans-Urals, both from similar hoards and from settlements, cultural identity of which is determined quite clearly and is attributed by researchers to the Alakul antiquities. For this reason, the origins of the Abzakovo hoard are also associated with the representatives of traditions of the Alakul archaeological culture.

BIOCHEMICAL COMPOSITION OF RAW MATERIALS OF SOME REPRESENTATIVES OF THE GENUS POTENTILLA L. FROM THE COLLECTION OF THE SOUTH URAL BOTANICAL GARDEN-INSTITUTE OF UFA FEDERAL RESEARCH CENTER OF RUSSIAN ACADEMY OF SCIENCES

The genus Potentilla L. is the most extensive species of the Rosaceae family. Potentillas are found in all ecological niches: on open rocky slopes, along river banks, on the edges of forests. At the same time, in addition to the pharmacopoeial species – erect cinquefoil (P.erecta L.) – other species of the genus Potentilla L. are currently of scientific interest, since they also contain a wide range of biologically active compounds, which determines their pharmacological effect. The aim of this work was a comparative study of the chemical composition of the aboveground and underground parts of some representatives of the genus Potentilla L., introduced in the conditions of the South Ural Botanical Garden-Institute of Ufa Federal Research Center of Russian Academy of SciencesQualitative reactions made it possible to determine the presence of ascorbic acid and tannins in the studied raw materials. Thin layer chromatography revealed the presence of oxalic (Rf=0.14), tartaric (Rf=0.36), citric (Rf=0.39), ascorbic (Rf=0.62) and malic acids (Rf=0.80). As a result of a quantitative analysis of the raw materials of four representatives of the genus Potentilla L. (P. erecta, P. alba, P. rupestris, P. chrysantha), it was revealed that the maximum accumulation of ascorbic acid is observed in leaves (0.47–0.64%), organic acids – in flowers (4.32–6.28%), tannins – in roots (14.25–24.78%). Despite the fact that the accumulation rates of some groups of biologically active substances in the pharmacopoeial form (P. erecta) are higher than in the studied taxa, Potentilla P. alba, P. chrysantha, P. rupestris also contain a significant amount of biologically active substances and are of interest for further study.

Timescale for the Kasimovian Stage

Abstract The Kasimovian Stage is the lower stage of the Upper Pennsylvanian Subsystem, in which a series of considerable biotic and abiotic events happened and changed the Earth. The Variscan orogeny and the Late Paleozoic Glaciation are two major events that caused geographical isolation of marine faunas and difficulties for a global correlation of biostratigraphy. Regional timescales of the Kasimovian across major continents are reviewed here. A global correlation of the Kasimovian is tentatively established based on a detailed review of major fossil groups such as conodonts, fusulines and some macrofossils. The index taxon for the base of the Kasimovian Stage has not been selected. The conodont species Swadelina subexcelsa , Idiognathodus heckeli , I. turbatus and I. sagittalis have good potential. Among them, I . heckeli is considered the best marker for the base of the Kasimovian Stage because it can mark a bioevent in a wide geographical range, and more importantly, it has a clear taxonomic definition within a phylogenetic lineage. The fusuline Montiparus might be regarded as an auxiliary marker to define the base of the Kasimovian based on its wider distribution. Other proxies, i.e. isotopic dating and strontium, carbon and oxygen isotopic stratigraphy throughout the Kasimovian, are also reviewed. The Global Boundary Stratotype Section and Point (GSSP) candidates for the Kasimovian Stage include the Naqing section, South China, the Usolka section, South Urals and the Afanasievo section, Moscow Basin. The Naqing section is regarded as the most appropriate GSSP candidate in terms of its complete sedimentary succession, well-recorded conodont lineages and well-studied bio-, chemo- and cyclo-stratigraphy.

ИССЛЕДОВАНИЕ МИНЕРАЛИЗАЦИИ ТВЕРДЫХ ТКАНЕЙ ЗУБОВ, ПОРАЖЕННЫХ ЛУЧЕВЫМ КАРИЕСОМ, С ПОМОЩЬЮ МЕТОДА РАМАН-ФЛЮОРЕСЦЕНТНОЙ ДИАГНОСТИКИ

Subject. Mineralization of hard tissues of teeth affected by radiation caries in patients after radiation therapy of malignant neoplasms.
 Objectives. To develop a digital method for diagnosing radiation caries based on Raman fluorescence technology.
 Methodology. The study was conducted at the Department of Orthopedic Dentistry and Orthodontics of South Ural State Medical University. The study was conducted on two groups of people (cohorts) comparable in sex and age, who voluntarily agreed to take part in it. The main group consisted of 20 people (patients with radiation caries), the comparison group – 20 people (without radiation caries). The main research method was the study of Raman fluorescence of tooth areas using the «InSpectr» hardware-software complex with diagnostic sensitivity according to the integral concentration of aerobic-anaerobic microbial suspension up to 109 KOE/ml. A study was made of teeth in the pathological area in patients of the main group, and in the intact area in patients of the comparison group.
 Results. Raman fluorescent diagnostics of the intact tooth surface and the surface with a pathological focus made it possible to clearly see the difference in mineralization in digitized indicators. So, for example, according to the indicators of patients with damage to the teeth by radiation caries, it can be concluded that the indicators of mineralization in the focus affected by radiation caries ( y = 172 ± 0.04, x = 963 cm-1) are lower than those of the intact area (y = 1174 ± 0.071, x = 963 cm-1)
 Conclusion. The method of Raman fluorescence diagnostics can be used in the diagnosis of radiation caries, since there is a potential difference between the healthy and the affected areas of the hard tissues of the tooth. On the basis of the study, the author recommends using the «InSpectr» hardware-software complex for diagnosing radiation caries.

Information Support of the Cultural Sector: Achievements, Problems, Prospects

The 2nd International Scientific and Practical Online Conference “Information Context of Culture: Resources, Technologies, Service” was held on October 11—12, 2022. Conference organizers are the Russian State Library (RSL), the Russian State Library of Arts (RSLA) and St. Petersburg State Institute of Culture (SPSIC). The purpose of the event is to summarize scientific research and practical experience on the issues of information support in the cultural sector, demonstrate the best achievements, identify problems and ways to overcome them. The leitmotif of the forum was the topic of cooperation between libraries, archives and museums of the member states of the Commonwealth of Independent States. During two days of the forum, more than 80 representatives of the cultural sector from the RSL, the RSLA, the Boris Yeltsin Presidential Library, the national libraries of Kazakhstan and Uzbekistan, public libraries of almost two dozen regions of Belarus, Kazakhstan and Russia, as well as from the universities of culture in Moscow, St. Petersburg, Chelyabinsk, Tashkent, as well as from the South Ural State University, worked in video communication mode. During the event, more than 900 viewings of the broadcasts of the meetings were recorded on the RSL YouTube channel. Within the framework of the conference, there were held the plenary session, two sessions of the Section “Information potential of libraries for the development of the cultural sector” and two special events: The 12th Conference/Meeting of the heads and specialists of information services on culture and art “Libraries — in the Year of Cultural heritage of the peoples of Russia” and the Round table “Development of library and information space on the basis of border libraries of the CIS member states: conceptual approaches and advanced directions”. In order to improve the work on information support for representatives of the cultural and art sector, the conference participants recommended to promote digital transformation aimed at the formation of common access resources on culture and art and improvement of information services; as well as to strengthen cooperation on the formation and mutual use of information resources created by the libraries of the CIS member states.

Intensity of Chemical Weathering in the Late Precambrian: New Data on the Riphean Stratotype, South Urals

Intensity of Chemical Weathering in the Late Precambrian: New Data on the Riphean Stratotype, South Urals

A New Radiolarian Genus Alexialeks gen. nov. and New Species from the Early Permian of the South Urals, Russia

A New Radiolarian Genus Alexialeks gen. nov. and New Species from the Early Permian of the South Urals, Russia