bluuebunny/crossref_metadata_2025 huggingface dataset:
High-efficacy glycerol acetalization with silica gel immobilized Brønsted acid ionic liquid catalysts—preparation and comprehending the counter-anion effect on the catalytic activity
Authors: Shashni Shalini , Singh Vasundhara , Toor Amrit Pal
Published: October 2021

Imidazolium sulfonate zwitterions (ZIs) with unconventional counter-anions were used to fabricate a series of mesoporous silica-gel-immobilized Brønsted acid ionic liquid (SG@BAIL) nanocatalysts.
Preparation of zeolitic bismuth vanadomolybdate using a ball-shaped giant polyoxometalate for olefin epoxidation
Authors: Zhang Zhenxin , Li Denan , Zhu Qianqian , Hara Michikazu , Li Yanshuo , Ueda Wataru
Published: October 2021

Bismuth vanadomolybdate-based zeolitic octahedral metal oxide was synthesized from {Mo72V30} and used as a heterogeneous catalyst for olefin epoxidation.
Phase transformation of iron oxide to carbide and Fe3C as an active center for the RWGS reaction
Authors: Liu Yang , Murthy Palle Ramana , Zhang Xiao , Wang Haiyan , Shi Chuan
Published: October 2021

Fe3C was produced from iron oxide and identified as active and stable in the reverse water gas shift reaction.
Synthesis,in vitroanti-plasmodial potency,in-silico-cum-SPR binding with inhibition ofPfPyridoxal synthase and rapid parasiticidal action by 3,5-bis{(E) arylidene}-N-methyl-4-piperidones
Authors: Rokkam Siva Kumar , Yadav Mamta , Joshi Mayank , Choudhury Angshuman Roy , Sahal Dinkar , Golakoti Nageswara Rao
Published: October 2021

DANMPs have been identified as new pharmacophores that have the ability to targetPfPyridoxal synthase and cause rapid killing of the malaria parasite.
Improving the electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathodes using a simple Ce4+-doping and CeO2-coating technique
Authors: Feng Yanhua , Zhang Xiangxin , Lin Changxin , Wang Qichao , Zhang Yining
Published: October 2021

LiNixCoyMn1−x−yO2 (x ≥ 0.6, NCM) has attracted much attention due to its high specific capacity and energy density.
Demonstration of elementary functions via DNA algorithmic self-assembly
Authors: Raza Muhammad Tayyab , Tandon Anshula , Park Suyoun , Lee Sungjin , Nguyen Thi Bich Ngoc , Vu Thi Hong Nhung , Jo Soojin , Nam Yeonju , Jeon Sohee , Jeong Jun-Ho , Park Sung Ha
Published: October 2021

Target-oriented cellular automata with computation are the primary challenge in the field of DNA algorithmic self-assembly in connection with specific rules.
Well-defined cyclic polymer synthesis via an efficient etherification-based bimolecular ring-closure strategy
Authors: Sharma Sandeep , Ntetsikas Konstantinos , Ladelta Viko , Bhaumik Saibal , Hadjichristidis Nikos
Published: October 2021

An alternative method to synthesize well-defined cyclic polymers via combination of anionic polymerization high vacuum techniques and Williamson etherification reaction in moderate dilution and up to 1 g scale.
Construction of In2S3@ZIF-8@ZnIn2S4 hierarchical nanoflower heterostructures to promote photocatalytic reduction activity
Authors: Yang Chengyuan , Wang Rong , Zhu Wenxin , Wang Jing , Zhang Liang , Du Ting , Liu Zhaoli , Xie Linxuan , Sun Jing , Wang Jianlong
Published: October 2021

A ZIF-8 interface (as an electron donor–acceptor) is fabricated to achieve ultrahigh photoreduction efficiency by optimizing the hierarchical heterostructures.
Phosphorous-functionalized PAMAM dendrimers supported on mesoporous silica for Zr(iv) and Hf(iv) separation
Authors: Qin Wei , Xu Kaixuan , Wang Junwei , Cui Xiaofeng , Zhang Jianli , Weng Yaqing
Published: October 2021

The adsorption and separation process of PS-G1.0-MSNs on Zr(iv) and Hf(iv).
Effects of the Hubbard U correction on the electronic and magnetic properties of the tetragonal V2P2 sheet
Authors: Abdullahi Yusuf Zuntu , Ahmad Sohail , Ibrahim Abdullahi Abdu
Published: October 2021

A recent theoretical work predicted the orthorhombic phase of the V2P2 sheet with the half-metallic electronic property using a linear combination of atomic orbitals (LCAO) basis set based on density functional theory (DFT).
Emergence and dynamics of unconfined self-organised vortices in active magnetic roller liquids
Authors: Han Koohee , Glatz Andreas , Snezhko Alexey
Published: October 2021

Dynamics of the spontaneous formation of unconfined vortices, and evolution of multi-vortical patterns towards a steady state are investigated in active magnetic roller ensembles.
Development of next generation nanomedicine-based approaches for the treatment of cancer: we've barely scratched the surface
Authors: Tracey Shannon R. , Smyth Peter , Barelle Caroline J. , Scott Christopher J.
Published: October 2021

Interest in nanomedicines has grown rapidly over the past two decades, owing to the promising therapeutic applications they may provide, particularly for the treatment of cancer. Personalised medicine and ‘smart’ actively targeted nanoparticles represent an opportunity to deliver therapies directly to cancer cells and provide sustained drug release, in turn providing overall lower off-target toxicity and increased therapeutic efficacy. However, the successful translation of nanomedicines from encouraging pre-clinical findings to the clinic has, to date, proven arduous. In this review, we will discuss the use of nanomedicines for the treatment of cancer, with a specific focus on the use of polymeric and lipid nanoparticle delivery systems. In particular, we examine approaches exploring the surface functionalisation of nanomedicines to elicit active targeting and therapeutic effects as well as challenges and future directions for nanoparticles in cancer treatment.
LUBAC: a new player in polyglucosan body disease
Authors: Aboujaoude Andrew , Minassian Berge , Mitra Sharmistha
Published: October 2021

Altered protein ubiquitination is associated with the pathobiology of numerous diseases; however, its involvement in glycogen metabolism and associated polyglucosan body (PB) disease has not been investigated in depth. In PB disease, excessively long and less branched glycogen chains (polyglucosan bodies, PBs) are formed, which precipitate in different tissues causing myopathy, cardiomyopathy and/or neurodegeneration. Linear ubiquitin chain assembly complex (LUBAC) is a multi-protein complex composed of two E3 ubiquitin ligases HOIL-1L and HOIP and an adaptor protein SHARPIN. Together they are responsible for M1-linked ubiquitination of substrates primarily related to immune signaling and cell death pathways. Consequently, severe immunodeficiency is a hallmark of many LUBAC deficient patients. Remarkably, all HOIL-1L deficient patients exhibit accumulation of PBs in different organs especially skeletal and cardiac muscle resulting in myopathy and cardiomyopathy with heart failure. This emphasizes LUBAC's important role in glycogen metabolism. To date, neither a glycogen metabolism-related LUBAC substrate nor the molecular mechanism are known. Hence, current reviews on LUBAC's involvement in glycogen metabolism are lacking. Here, we aim to fill this gap by describing LUBAC's involvement in PB disease. We present a comprehensive review of LUBAC structure, its role in M1-linked and other types of atypical ubiquitination, PB pathology in human patients and findings in new mouse models to study the disease. We conclude the review with recent drug developments and near-future gene-based therapeutic approaches to treat LUBAC related PB disease.
Real‐world super‐resolution of face‐images from surveillance cameras
Authors: Aakerberg Andreas , Nasrollahi Kamal , Moeslund Thomas B.
Published: October 2021

Most existing face image Super‐Resolution (SR) methods assume that the Low‐Resolution (LR) images were artificially downsampled from High‐Resolution (HR) images with bicubic interpolation. This operation changes the natural image characteristics and reduces noise. Hence, SR methods trained on such data most often fail to produce good results when applied to real LR images. To solve this problem, a novel framework for the generation of realistic LR/HR training pairs is proposed. The framework estimates realistic blur kernels, noise distributions, and JPEG compression artifacts to generate LR images with similar image characteristics as the ones in the source domain. This allows to train an SR model using high‐quality face images as Ground‐Truth (GT). For better perceptual quality, a Generative Adversarial Network (GAN) based SR model is used, where the commonly used VGG‐loss [1] is exchanged with LPIPS‐loss [2]. Experimental results on both real and artificially corrupted face images show that our method results in more detailed reconstructions with less noise compared to the existing State‐of‐the‐Art (SoTA) methods. In addition, it is shown that the traditional non‐reference Image Quality Assessment (IQA) methods fail to capture this improvement and demonstrate that the more recent NIMA metric [3] correlates better with human perception via Mean Opinion Rank (MOR).
J1832.4-1627, the first eclipsing stream-fed intermediate polar
Authors: Beuermann K. , Breitenstein P. , Schwab E.
Published: October 2021

We present a photometric study of the newly discovered eclipsing intermediate polar J183221.56-162724.25 (in short J1832) with an orbital period of 8.87 h. The system features a box-like deep eclipse with a full width at 50% depth of 1970 ± 2 s and a large-amplitude coherent pulsation with Pobs = 65.18 min, which represents either the synodic (beat) period or the spin period of the white dwarf (WD). The period ratio is either Pspin/Porb  =  0.1091 or 0.1225, respectively. The eclipsed light originates almost entirely from the two accretion spots and columns on the WD, with characteristics indicative of pole flipping. There is no evidence for an accretion disk, and we identify J1832 as the first deeply eclipsing stream-fed intermediate polar. Our grizy photometry in eclipse yielded an i-band AB magnitude of the Roche-lobe-filling secondary star of 18.98(3), an extinction EB − V = 0.54 ± 0.17, and a spectral type ∼K6. Dynamic models, fitting the photometry, limit the distance to between 1270 and 2500 pc for masses of the secondary star, M2, between 0.16 and 1.0 M⊙, well within the Gaia EDR3 confidence limits. Employing a luminosity selection inspired by binary population studies yields a mean M2 = 0.32 M⊙ with a 2σ upper limit of 0.60 M⊙ and a mean distance d = 1596 pc with a 2σ upper limit of 1980 pc. The secondary star is located in its Hertzsprung-Russell diagram at a mean Teff, 2 = 4120 K and log(L2/L⊙) = − 0.92, from where the binary can evolve into either a polar or an ultracompact binary with a highly magnetic primary. The system displays a variable accretion rate, lapses repeatedly into short-lived low states of negligible accretion, and currently displays an orbital period that decreases on a timescale of τ ∼ 3  ×  105 yr. X-ray observations, optical spectroscopy, and spectropolarimetry have a high potential for studies of the properties of J1832 as an individual object and of stream-fed accretion in general.
The status of Listera cordata cenopopulation in the nurgush state nature reserve
Authors: Bakka Sergey , Kiseleva Nadezhda
Published: October 2021

The census of Listera was conducted on routes with a total length of 11.05 km on 2020. The width of the recording transect was 10 m. In suitable habitats, plants were located in relatively dense groups, separated from each other by considerable distances. We have revealed 31 subpopulations of Listera with a total of 283 generative shoots and 1949 vegetative ones. The density of Listera in the surveyed habitats was 3.50 ind./ha, density in the subpopulations was from 5 to 13 ind./sq.m, on the average 6.81 ind./sq.m. All the Subpopulations were confined to areas of moss cover dominated by sphagnum mosses, but with the obligatory presence of Polytrichum commune and hypnum mosses. The setting and ripening of Listera fruits in 2020 were high: fruits were developed from 84% of flowers. The Tulashor site of the Nurgush State Nature Reserve plays an important role for the conservation of Listera cordata in the Kirov region.
Flower size dimorphism, perianth shape and sex ratio in a gynodioecious Prunella vulgaris (Lamiaceae)
Authors: Godin Vladimir , Arkhipova Tatyana , Meier Natalia
Published: October 2021

Prunella vulgaris is a gynodioecious species that forms two types of flowers, perfect and female, on different plants. These two sexual types of flowers have significant differences in some characters of calyx, corolla, androecium, and gynoecium. The distinctiveness of gynodioecy in P. vulgaris consists in insignificant size differences in anthers, the formation of sterile pollen in female flowers, and the shape of a corolla in two sexual types of flowers. Hermaphrodite plants are dominated in P. vulgaris (59.8 to 87 percent). In flood plain meadows, the proportion of females is significantly higher (from 25.9 to 40.2 percent) than in dry and forest meadows (from 13 to 19.1 percent).
Database of anthropogenic vegetation of the Urals and adjacent territories
Authors: Golovanov Yaroslav , Abramova Larisa
Published: October 2021

The main data on the geobotanical database – Database of antropogenic vegetation of Urals and adjacent territories registered in the Global Index of Vegetation-Plot Databases and the European Vegetation Archive are presented. The database includes more than 4,000 complete geobotanical relevés made between 1984 and 2020. The database contains the territories of 3 subjects of the Russian Federation (the Republic of Bashkortostan, Orenburg, Chelyabinsk regions) and 1 - the Republic of Kazakhstan (Aktobe region). For each relevés, a complete list of species with indication of abundance in points on the Braun-Blanquet scale. The main indicators (total cover, average height of the grass, etc.). For most descriptions, GPS coordinates and location are given. The ecological conditions were assessed with use of average values of E. Landolt scale. In the J. Braun-Blanquet classification system, all communities included in the database belong to nine vegetation classes (7 anthropogenic and 2 semi-natural), 75 associations and various types of communities. Geobotanical relevés with the dominance of such aggressive invasive species (Acer negundo, Ambrosia psylostachya, Echinocystis lobata, Elodea canadensis, Solidago canadensis, Heracleum sosnowskyi, Hordeum jubatum, Xanthium albinumetc.) are also included in the database.
Sexual and ontogenetic structures of gynodioecious Geranium pseudosibiricum J. Mayer (Geraniaceae) in Altai Mountains
Authors: Gordeeva Natalia
Published: October 2021

Geranium pseudosibiricum J. Mayer. is a gynodioecious North and Central Asian species. The study was conducted in a grass meadow on the edge of larch forest in the Altai Republic. The aim was to study the sexual and ontogenetic structures of the coenopopulation of G. pseudosibiricum. The generative individual consists of shoots of only one sexual form: hermaphrodite with bisexual flowers and female with pistillate flowers. There are significant differences in the length of corolla: the length of bisexual flowers is 12.2 ± 0.29 mm, pistillate flowers 6.7 ± 0.19 mm. The bisexual flower has well-developed stamens and anthers; the pistillate flower has stamens with underdeveloped anthers. There are no significant differences between hermaphrodite and female individuals in the number of generative shoots and the number of flowers per individual. The ontogenetic structure of the coenopopulation of G. pseudosibiricum is dominated by pregenerative individuals − 53%. Good seed germination contributes to maintenance of sexual structure of the coenopopulation. The female frequency is 55% of the total number of generative plants. The detected morphological differences between bisexual and pistillate flowers and the high female frequency may indicate a high degree of sexual differentiation of G. pseudosibiricum.
Forest typological features of herb species abundance distributions of pine forests in the Ural Mountains
Authors: Ivanova Natalya
Published: October 2021

The problem of preserving biodiversity in the face of human influence and climate change is one of the most pressing problems of modern ecology. The aim of the study is to identify the characteristics of herb SAD for various mountain pine forest types in the Middle Urals. Studies conducted in various types of pine forests have shown that the SAD method is an effective method for analysing the species structure and biodiversity of forest vegetation. The results presented in the form of graphs are clear, intuitive and easy to interpret. The use of approximations by several functions and comparison with theoretical distributions allows a deeper understanding of the features of forest species diversity
Reproductive ability of Poa pratensis L. and P. angustifolia L. in conditions of Kazakhstan and Western Siberia
Authors: Khussainova Irina , Zueva Galina
Published: October 2021

The article presents the seed productivity of five cultivars of Poa pratensis L. for lawn purposes and three wild-growing specimens of Poa pratensis L. and Poa angustifolia L. from natural populations in the south-east of Kazakhstan and in the south-west of Siberia, summarized over three years. The onset of the main phenological phases was determined, taking into account the weather conditions of the region where the experiment was held, and a comparative analysis between the samples was carried out. The correlation connection between three signs of the reproductive sphere and their consistency with weather conditions was researched. For all varieties, a significant conjunction was revealed between the number and weight of seeds per spike, a considerable variation in the coefficient of seed production over the years. The best indicators of seed productivity were noted in the plant variety ‘Novosibirskiy’ and wild forms ‘C-2’ and ‘D1-78’ in Western Siberia, in the plant variety ‘Balin’ and wild specimen ‘K-0027’ in Kazakhstan. The influence of environmental conditions on the organogenic process of P. pratensis was revealed. Additional moisture contributes to the manifestation of the potential capability for seed reproduction of the researched samples of P. pratensis.
Diversity of aquatic vegetation (Lemnetea O. de Bolòs et Masclans, Potamogetonetea Klika in Klika et Novák 1941) in the Russian Federation
Authors: Kipryanova Laura , Chepinoga Victor , Rosbakh Sergey
Published: October 2021

In a frame of the project “Vegetation classification of Russia”, we have compiled the prodromus of two classes of aquatic vegetation, i.e.LemneteaO. de Bolòs et Masclans 1955 andPotamogetoneteaKlika in Klika et Novák. The diversity ofLemneteain the Russian Federation is consists of 15 associations belonging to 3 alliances and one order. Diversity ofPotamogetoneteais presented by 56 associations from 5 alliances and two orders. The presented version of the prodromus is a preliminary. We count all valid sytaxa revealed from the territory of the Russian Fedeeeration. The final prodromus will be obtained after the numerical data processing and considering the plurality of syntaxonomic decisions.
Spatial vegetation distribution and zonal vegetation type on islands in southern part of the Lena Delta (Eastern Siberia)
Authors: Lashchinskiy Nikolay
Published: October 2021

In this research spatial distribution of the different vegetation types on Lena Delta islands described in connection with their relief, time of formation and geological substrates. It was shown that zonal vegetation can be find only on third river terrace on gentle slopes. Because of continuous permafrost predominant vegetation is presented by hydro serial communities united into successional cycles. Zonal vegetation types occupy not more than 1-2% of the whole area.
The ecology of urban system: assessment using Spiraea plants
Authors: Lugovskaya Anna , Khramova Elena , Karpova Evgenia
Published: October 2021

The article presents the results of the study of the shift in the morphological parameters of the leaves of three species of the genus Spiraea L. growing under the conditions of transport-caused and industrial pollution in large industrial citi of Western Siberia (Novosibirsk) in comparison with that in background conditions (reference). The morphological indices (length, width, perimeter, and area of the lamina) were determined by digital image analysis using the Maplnfo software. The anthropogenic impacts induced a reduction in the size of the assimilating organs and an increase in the index of the fluctuating asymmetry of the leaves of urban plants compared to background plants. According to the fluctuating asymmetry index, the environmental quality of the Lenin district of Novosibirsk was assessed as critical, meanwhile that of the reference conditions corresponded to the norm.
Morphological markers with a triploid set of chromosomes by breeding of apple tree at the polyploid level
Authors: Makarenko Sergey
Published: October 2021

The results many years of research in the conditions of the Altai low mountains are given the assessment of hybrid apple populations from heterploid crosses according to the characteristics: resistance to scab, degree of culture, growth strength, stem thickness, leaf thickness, leaf index, morphometry of the graft and stipules, ploidy. The correlation was established by the studied indications with the triploid set of chromosomes of hybrids from heteroploidy’s crosses. It is shown that the cytological assessment of karyotypes selected for a complex of morphological features is required in a significantly smaller volume, and varieties of siberian selection are capable for partial formation of germ sacs with a diploid set of chromosomes. Morphological markers for apple tree selection at the polyploid level were determined by identifying seedlings in the juvenile stage with a triploid set of chromosomes inside a hybrid population. The application of morphological markers makes it possible to identify from 14 to 100% of seedlings with a triploid set of chromosomes in dependence on the original tetraploid form.
The use of prolonged fertilizers for vegetative reproduction of Prunus salicina in the conditions of the Krasnoyarsk forest-steppe
Authors: Mistratova Natalia
Published: October 2021

The article examines the influence of Osmocote Exact Standard fertilizers on the biometric parameters of Chinese plum (Prunus salicina) saplings of varieties Pyramidalnaya and Altayskaya Jubileinaya during vegetative propagation (by the method of winter grafting) in the Krasnoyarsk forest-steppe conditions. The use of prolonged fertilizers when growing plum planting material has a positive effect on the development of biometric parameters of the aboveground and underground phytomass of plants: the average number of shoots in the variant with longacting fertilizers was 2.7-3.0 pcs. An increase in the average length of shoots was recorded in the variants using Osmocote - 15.9-18.1 cm, these indicators are 2.9-8.7 cm higher than the control variants. Application of prolonged fertilizers had a favorable effect on the growth and development of the root system of plum seedlings: average the number of roots of the 1st branching order was 9.7-12.7 pcs, the average length of the roots of the 1st branching order was 9.4-10.3 pcs.
Identification of Nepeta olgae Regel and phylogenetic status of some genera in subtribe Nepetinae (Lamiaceae) using DNA markers
Authors: Nikitina Elena , Rakhmatov Abdurashid
Published: October 2021

The species level diversity is the reference unit for biodiversity accounting, should be systematized and include full information about the species. Reliable identification of any species is critical for a large-scale biodiversity monitoring and conservation. A DNA barcode is a DNA sequence that identifies a species by comparing the sequence of an unknown species with barcodes of a known species sequence database. Accurate identification of important plants is essential for their conservation, inventory. The species diversity assessing exampled on the subtribe Nepetinae (Lamiaceae) representatives, growing in Uzbekistan is given, using DNA barcoding method. The study was aimed to identify indigenous important plants with the nuclear (ITS) and plastid (matK, rbcL, trnL-F) genomes. This work demonstrates the phylogenetic relationships of some genera within the subtribe Nepetinae Coss. & Germ. (Lamiaceae), based on ITS locus gene. All results indicate that the DNA barcoding tool can be successfully used to reliably identify important plants, to inventory the botanical resources of Uzbekistan and to create a reference library of DNA barcodes. So, the combination of three-four locus gene is a good candidate for this approach.
Trichomes of mericarpian species of the genus Galium (Rubiaceae) in Asian Russia
Authors: Pinzhenina Ekaterina A.
Published: October 2021

The surface structure of mericarp of 16 species from 9 sections of the genus Galium, growing in Asian Russia, has been studied by scanning electron microscopy. Clothing trichomes were found on the surface of the fruit. It was noted that the clothing trichomes are distributed over the mericarp or concentrated in separate parts of it. Based on the results obtained, two morphological types and six subtypes of clothing trichomes were identified, which have taxonomic significance.
Coenopopulation Structures of Various Plant Species in Yakutia
Authors: Semenova Varvara
Published: October 2021

This research work details analysis of the coenopopulation structure of 13 plants of various species in Yakutia and compares them with the characteristic spectra types of their species. The structure of plant coenopopulations was investigated from 2003 to 2019 in Central Yakutia. The left-sided and centered ontogenetic spectra are found in perennial plants with simple ontogenesis and shallow rejuvenation which were studied. The left-sided spectrum is the basic structure of these coenopopulations. The centered ontogenetic spectrum is largely found in unfavorable growing conditions under the impact of grazing and trampling by cattle and horses. This rule applies to the CP structure of Veronica incana which is an evergreen chamaephyte and for which the seasonal anthropogenic load contributes to the mechanical vegetative reproduction of its species, resulting in stable left-sided CP spectra. The ontogenetic spectra of the studied plants coincide with the characteristic spectra of the species and are considered stable.
Vegetation cover analysis of the mountainous part of north-eastern Siberia by means of geoinformation modelling and machine learning (basic principles, approaches, technology and relation to geosystem science)
Authors: Zakharov Moisey , Cherosov Mikhail , Troeva Elena , Gadal Sebastien
Published: October 2021

For the first time, the geoinformation modelling and machine learning approaches have been used to study the vegetation cover of the mountainous part of North-Eastern Siberia – the Orulgan medium-altitude mountain landscape province. These technologies allowed us to distinguish a number of mapping units that were used for creation and analysis of 1:100 000 scale vegetation map of the interpreted key area. Based on the studies, we decided upon the basic principles, approaches and technologies that would serve as a methodology basis for the further studies of vegetation cover of the large region. Relief, slope aspect, genetic types of sediments, and moisture conditions were selected as supplementary factors to the vegetative indices for differentiation of both plant communities and vegetation map units.
Substantiation of determination of strength performance of coarse-grained media by the oblique shear method
Authors: Shabaev Sergey , Ivanov Sergey
Published: October 2021

The constantly increasing loads of vehicles predetermine the search for ways to improve both design methods, technological processes and the search for ways to improve the quality of road construction materials. The increasing volumes of open-pit coal mining require finding ways to improve the haul roads of open-pit coal mines. Thus, a qualitatively new approach is needed to determine the strength performance of coarse-grained media. In this work, it is proposed to determine the strength performance of granular media by the oblique shear method, since today there is no design method to determine the strength performance of coarse-grained media. The proposed design of the advanced oblique shear apparatus makes it possible to determine the strength performance of pre-compacted coarse-grained media with a particle size of up to 20-30 mm. To avoid the effect of keyways and chaotic results, the optimum clearance between the upper and the lower holders should be 0.3 times the maximum particle size.
Study of the parameters of spontaneous fire seats in coal pit rock dumps
Authors: Protasov Sergey , Seregin Evgeny , Portola Vyacheslav , Bobrovnikova Alena , Gorbacheva Marina
Published: October 2021

The presence of coal and coal-bearing rocks in waste rock dumps of open-pit coal mines contributes to the occurrence of spontaneous combustions that negatively affect the environment and people. Measurements of the temperature and the content of hazardous gases in the temperature anomaly that arose in the waste rock dump of the open-pit coal mine were made to assess the parameters of spontaneous fire seats. In the course of the study, the efficiency of detecting spontaneous fire seats in waste rock dumps was assessed by measuring the rock temperature in the wells with a depth of 2.5 m, drilled at a distance of 20 m from each other. The experiment showed the difficulty of drilling control wells in waste rock dumps and the impossibility of drilling them on the slopes of dumps, especially in spontaneous fire seats with a high rock temperature. The necessity of casing control wells with pipes makes it difficult to measure the rock temperature at different depths. It was found that there are sharp drops in the rock temperature in the heated area of the dump, which cannot be detected when the wells are located at the recommended distance. The measurements showed that in all wells the temperature increases with depth, therefore the depth of wells recommended by the regulatory documents does not allow determining the size of the heated area.
Modern methods of motor-wheel gearboxe diagnostics of BelAZ dump trucks
Authors: Kudrevatykh Andrey , Ashcheulov Andrey , Vinidiktov Andrey
Published: October 2021

The most important mining enterprise indicators are the reliability and durability of its equipment. These equipment parameters have the greatest impact not only on the mining complex efficiency, but also on the extracted minerals price, as the equipment downtime, as well as, the cost of repair works and spare parts purchase are included in the cost of coal. Thus, the main goal in improving mining production is to improve the reliability and durability of used equipment. Researches carried out in the coal company ‘Kuzbassrazrezugol’ showed that the largest number of mining equipment downtime, in particular of mining dump trucks, occurs due to unexpected failure of a motor-wheel gearbox. The introduction of the additional technological operation for diagnosing the actual technical condition of gearboxes in the maintenance procedure will allow monitoring the condition of the entire gearbox and, in particular, its components by an in-place repair method. This method consists of continuous or periodic measurement of the vibrations of the operating gearbox mechanisms. The analysis of the unit and its individual parts suitability is carried out on the bases of obtained measurements. This methodology usage at a mining enterprise will significantly reduce the number of equipment downtime and thereby increase its efficiency.
The wavelet transforms technique in the computer-aided system for controlling the quarry unmanned vehicles
Authors: Chicherin Ivan , Fedosenkov Boris , Dubinkin Dmitriy , Zhenbo Wang
Published: October 2021

Introduction. Purpose of the work. Within the framework of the computer-aided system, a technology has been formed for the method of controlling the current trajectories (CTs) of unmanned vehicles (UMVs) when they move along routes in a quarry in open pit mining. The purpose of the presented studies is to analyze the application of a wavelet transforms technique to the problem of routing unmanned vehicles when they move along routes within open pit roads. Methodology. The results of modeling certainone-dimensional signalscorresponding to the UMV current trajectories when they deviate to the left / right from a nominal axial trajectory (NAT), as well astheir time-frequency representationsin a wavelet medium are presented. An algorithm of the procedure for displaying scalar UMV CT control signals in a complex medium of time-frequency wavelet transforms has been developed and described. Such a transformation allows for a functionally transparent and information-capacious monitoring of the UMV movement and efficiently manage the processes of trajectory routing dump trucks in an open pit. Research results, analysis. The processes of modifying the UMV movement current trajectories under the control of the computer-aided system are generated using wavelet transforms methods. They are based on algorithms for projecting the trajectory signals with a time-dependent frequency (chirp signals) onto a set of wavelet functions as part of a wavelet thesaurus (wavelet dictionary), executing certain wavelet matching pursuit procedures, and displaying the CT scalar signals in a specific multidimensional medium of Cohen’s class time-frequency distributions. The simulation results in the form of the current trajectory (CT-) signals waveforms and their three-dimensional time-frequency representations as Wigner maps showing the UMV movement in a start-stop mode, as well as the signals of formed continuous deviation trajectories when they leave to the left and to the right from the NAT, are presented. An algorithm for the formation of 3D-representations of UMV current trajectory one-dimensional signals is presented. Conclusion. The conclusion is made that the mathematical technique of wavelet transforms is the most expedient and effective means for computer-aided monitoring and controlling the dynamics of UMV movement along routes within open pit roads.
Investigation of the electric drive system of the lifting unit with parallel coordinate correction
Authors: Reshetnyak Sergey , Maksimenko Yuriy , Zakharova Alla
Published: October 2021

In the presented publication, the issues of improving the energy efficiency of the electric drive system, in relation to mine lifting installations, are considered. A block diagram of the electric drive system of a mine lifting installation with parallel coordinate correction is considered, as well as a mathematical description of the presented system. It should be noted that the conducted research will significantly affect the improvement of the level of safety and accident-free operation of the mine lifting plant, which will increase the competitiveness of coal mining by underground method.
Digital Transformation in the Mining Sector: Exploring Global Technology Trends and Managerial Issues
Authors: Lazarenko Yuliia , Garafonova Olga , Marhasova Vyktoriia , Tkalenko Nataliia
Published: October 2021

Across the industries, management faces increasing pressure to make digital transformation a strategic priority and embrace the opportunities offered by digitalization, and the mining sector is not an exception in this regard. Whereas it is recognized that within the mining industry digitalization will be a driving force that has a great potential to transform the nature of companies and their interaction with stakeholders at every stage of the value chain, there seems to be a lack of an understanding as to what should be investigated from a managerial perspective for the successful undertaking of the digital transformation initiatives. The paper aims to provide a descriptive overview of the global industry trends with regard to digital technologies in the mining sector, as well as develop a conceptual digital transformation framework that is intended to improve business’ digitization processes for the mining companies by identifying the core managerial areas on which attention should be focused in order to ensure effective implementation of the digital transformation strategy. These main action fields, along with optional additional dimensions could be further elaborated depending on the organizational context and industry environment, and should be taken into consideration when planning and organizing activities directed at delivering effective digital transformations.
State as a stakeholder in the development of metallurgical industry corporations
Authors: Kozyrieva Olena , Orlova Nataliia , Zabashtanskyi Maksym , Rogovyi Andrii , Berezovskyi Danylo
Published: October 2021

The article substantiates the expediency of studying the role of stakeholders in the formation and implementation of corporate social strategy within the activities of corporations in the metallurgical industry in the Ukraine. The important role of the state, as a stakeholder, in establishing effective relations with corporations in the implementation of Ukraine's sustainable development strategy has been proved. The purpose of the article is to determine the capabilities of the state and its impact on the implementation and development of corporate social responsibility strategy in corporations of the metallurgical industry of the Ukraine. The information is based on the reports of Metinvest Corporation, DTEK and the CSR Development Center. The article identifies state economic and marketing incentives for the development of socially responsible behavior of corporations in the metallurgical industry. The analysis of the directions of the corporate social responsibility strategy of Metinvest and DTEK is carried out, and the comparative characteristic of the ways of ecological responsibility of corporations is conducted. The regional features of the formation of the strategy of social responsibility for multinational corporations are determined. The conclusions indicate that the level of interaction of metallurgical corporations with stakeholders is still at a low level, but areas (projects) of corporate social responsibility for the implementation of state national programs have already been formed.
Contemporary trends in sustainable development reporting of mineral resources companies
Authors: Murko Vasiliy , Chernikova Oksana , Sultanaliev Myrzatay
Published: October 2021

The article analyzes contemporary trends in sustainable development reporting in Russian business practice, provides assessment of current situation with disclosure of non-financial information by national companies, including those of mineral resources sector, describes the main features of Russian socially-oriented reports, identifies insufficiencies of the reporting documentation provided. Relevance of the research is determined by active development of socially responsible investment with appreciation of ESG factors, increased attention of the investors to the long-term sustainability of companies, to the quality of financial and non-financial risks management. The focus on sustainable development is the key issue in shaping strategies of the global and Russian agenda. Consequently, requests from various stakeholder groups for information on companies activities in this regard are becoming more frequent. The purpose of the study is to analyze and assess trends in corporate sustainable development reporting in business practice of Russian companies, including mineral resource sector, and to develop recommendations for implementation of integrated document formats in accordance with international practice
Pattern and management outcomes of head and neck hemangiomas: a prospective study from Tanzania
Authors: Mungia Abbas M. , Owibingire Sira Stanslaus , Moshy Jeremiah Robert , Sohal Karpal Singh , Sianga William
Published: October 2021

Introduction:Hemangiomas arise from the proliferation of endothelial cells surrounding blood-filled cavities. They have a slightly higher female predilection and about 60–70% of them occur in the head and neck region. Various medical and surgical options are available for the treatment of hemangiomas.Aim: To determine the pattern and management outcomes of head and neck hemangiomas in Tanzania.Material and methods: This was a one-year prospective, cross-sectional study that involved all consecutive patients with head and neck hemangiomas treated in Muhimbili National Hospital. A structured questionnaire was used to collect information including age and sex of the patient, chief complaint and, duration, size and site of the lesion. The treatment modalities were surgery and/or intralesional bleomycin injection (IL-Bleo). A standard dose of bleomycin was 0.3 to 0.6 mg/kg per injection not exceeding 15 units per cycle with a maximum of 6 cycles. Frequency distribution and cross-tabulation were performed and association between variables was assessed by the Chi-square test, whereby thep-value was set atp< 0.05.Results:A total of 58 patients were included in the study. The male to female ratio was 1:1.4 and the median age was 6.15 years. Majority (74%) of the patients had infantile hemangioma. The most common presenting complaint of patients/guardians of the patients were facial disfigurement (94.8%), pain (32.8%) and ulceration (22.4%). The most frequently involved sites were the lips (55.2%) followed by the cheeks (37.9%). In patient who were managed surgically, there was a 100% reduction in size of the lesion. Of those who were treated with bleomycin, the percentage reduction in the area of the lesion ranged from 8.33% to 100% with mean of 72.6%. Only 6% of the patient had post IL-Bleo complications.Conclusion:Head and Neck hemangiomas are more common in females and majority are infantile hemangioma. Facial disfigurement is the commonest presenting complication of these lesions, and the lips and the cheeks are mostly affected areas. Intralesional bleomycin is an effective treatment modality which has low complication rates.
Ergebnisse einer deutschlandweiten Umfrage über Beratung zu lebensstilbezogener Verhaltensänderung (BzlV) in der physiotherapeutischen Versorgung – eine Querschnittstudie
Authors: Roidl Anna , Gabriel Anna , Beckmann Jürgen
Published: October 2021

Hintergrund Es ist unklar, in welchem Umfang Beratung zu lebensstilbezogener Verhaltensänderung (BzlV) in Deutschland bereits in die physiotherapeutische Arbeit integriert ist und ob Physiotherapeut*innen die erforderlichen Kompetenzen aufweisen.

Ziel Erfassung der Einstellung von Physiotherapeut*innen zur Gesundheitsförderung sowie zu Praxis, Kompetenzen und möglichen Barrieren für die Umsetzung von BzlV.

Methode Mittels Online-Umfrage wurden in Deutschland tätige Physiotherapeut*innen zu ihren allgemeinen Einstellungen zur Gesundheitsförderung sowie zu Praxis, Kompetenzen und möglichen Barrieren für die Umsetzung von BzlV befragt. Neben einer deskriptiven Analyse der Angaben wurden Unterschiede zwischen akademisch und nicht akademisch ausgebildeten Physiotherapeut*innen mithilfe des Mann-Whitney-U-Tests ermittelt.

Ergebnisse 511 Physiotherapeut*innen nahmen an der Umfrage teil, davon konnten 413 Fragebögen in die deskriptive Analyse eingeschlossen werden (Alter: 36,4 (± 10,88 SD) Jahre; w/m: 281/132). 92,7 % der Befragten hielten Gesundheitsförderung für einen fundamentalen Bestandteil der physiotherapeutischen Arbeit und 93,4 % stimmten zu, dass die Förderung eines gesunden Lebensstils zur Arbeit von Physiotherapeut*innen gehöre. Die Befragten erhoben (a) und berieten (b) am häufigsten zum Risikofaktor körperliche Inaktivität (a: 89,8 %; b: 91,3 %) und gaben an, über geringe bis mittlere Kompetenzen für die Beratung zur Verhaltensänderung zu verfügen. Akademisch ausgebildete Physiotherapeut*innen schätzten ihre Kompetenzen besser als nicht akademisch ausgebildete Physiotherapeut*innen (W = 8253,5, p = 0,001, r = 0,182) ein. Als häufigste Barrieren bei der Umsetzung von BzlV wurden strukturelle Ursachen, wie Zeitmangel (64,9 %) und fehlende Vergütung (70,5 %), genannt.

Schlussfolgerung Physiotherapeut*innen haben überwiegend eine positive Einstellung zur Gesundheitsförderung und erachten BzlV als sehr wichtig. Derzeit bestehen aber noch viele Barrieren, die Physiotherapeut*innen an der Umsetzung hindern. Damit diese in Deutschland dennoch einen Beitrag zur Gesundheitsförderung leisten können, sollten Rahmenbedingen und Ausbildungsinhalte angepasst werden.
Multimodale Therapie des resektablen Ösophaguskarzinoms
Authors: Mann Carolina , Michel Maurice , Grimminger Peter
Published: October 2021

Das Ösophaguskarzinom ist eine lebensbedrohliche Erkrankung – trotz interdisziplinärer Therapiestrategien liegt die 5-Jahres-Überlebensrate unter 50 %. Dieser Artikel gibt einen Überblick über das stadiengerechte Vorgehen und die Vor- und Nachteile der aktuell in Europa praktiziertenmultimodalen Therapie des Ösophaguskarzinoms.
Towards the Development of Frustrated Lewis Pair (FLP) Catalyzed Hydrogenations of Tertiary and Secondary Carboxylic Amides
Authors: Paradies Jan , Köring Laura , Sitte Nikolai A.
Published: October 2021

The development of the frustrated Lewis pair catalyzed hydrogenation of tertiary and secondary amides is reviewed. Detailed insight into our strategies in order to overcome challenges during the reaction development process is provided. Furthermore, the developed chemistry is extended to the hydrogenation of polyamides and of trifluoroacetamides for the convenient introduction of trifluoroethyl groups into organic molecules.
Early Diagnosis of Prediabetes among Pregnant Women that Develop Gestational Diabetes Mellitus and Its Influence on Perinatal Outcomes
Authors: Wilkie Gianna , Delpapa Ellen , Leftwich Heidi
Published: October 2021

Objective Purpose of this study was to determine whether early identification of impaired glucose tolerance consistent with prediabetes among pregnant women with gestational diabetes mellitus (GDM) in the first trimester impacts maternal and neonatal outcomes.

Study Design This was a retrospective cohort study of patients who were screened for pregestational diabetes in early pregnancy at a large academic tertiary care center from October 1, 2017, to January 31, 2021, and who subsequently developed GDM. Demographic and perinatal outcomes were compared among women with GDM with a positive early diabetes screen consistent with prediabetes to women who screened negative in the first trimester. Multivariable logistic regression was performed to adjust for baseline demographic differences.

Results During the study period, 260 women screened had negative first trimester diabetes screening and subsequently developed GDM, while 696 screened positive for prediabetes and developed GDM. Women with prediabetes were more likely to require insulin treatment for their GDM compared with those that screened negative (79.5 vs. 45.4%, p < 0.001), while those who screened negative were more likely to take an oral medication of metformin or glyburide for GDM management than those with prediabetes (41.5 vs. 16.4%, p < 0.001). Infants born to mothers who screened positive for prediabetes were more likely to require neonatal intensive care unit (NICU) admission compared with those who screened negative even when adjusted for type of GDM treatment used (adjusted odds ratio [aOR] = 8.5, 95% confidence interval [CI]: 1.5–49.9).

Conclusion Women identified as having early impaired glucose tolerance consistent with prediabetes that subsequently develop GDM are more likely to be prescribed insulin treatment and may be at increased risk of adverse neonatal outcomes leading to NICU admission than women with negative first trimester diabetes screening. Future studies should focus on whether different methods of early treatment and/or intervention improve perinatal outcomes.

Key Points