bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE FORMATION OF SPRINGTAIL ASSEMBLAGES (HEXAPODA, COLLEMBOLA) ALONG A RETREATING TSEY GLACIER, NORTH OSSETIA – ALANIA
Authors: Antipova M. D. , Babenko A. B. 
Published: April 2024

Successional changes in springtail communities were studied along a retreating Tsey Glacier at 2336 to 2071 m a.s.l. Springtails were collected from 10 sites of different ages ranging from 1 to 170 years. The sites covered the main stages of surface overgrowth, from a bare ground through a grassy-shrub stage to mixed and then mature pine forests. Springtails appeared already during the first year after the glacier’s retreat and were represented by a species of the genus Desoria, a peculiar inhabitant of bare rocky-sandy soils. During the first 7–14 years of succession, rapid changes in population and species composition repeatedly occurred. Both abundance and species diversity of springtails sharply increased at the grassy-shrub stage (14 years) and reached their maximum at later ones. Starting with this intermediate stage, springtail assemblages were primarily composed of widespread generalists belonging to euedaphic and hemiedaphic life forms. Beginning from this point, the pace of succession gradually slowed down. Approximately 100 years since, springtail communities reached a level of diversity similar to that found in mature mountain forest communities in the region. However, their species composition and structure remained quite distinctive. A comparison with similar foreign studies showed the composition of periglacial springtail communities to exhibit high-level regional specificity.
Aptasensors based on track-etched membranes coated with nanostructured silver layer for influenza A and B virus detection
Authors: Kukushkin V. I. , Kristavchuk О. V. , Zhdanov G. А. , Keshek А. К. , Gambaryan А. S. , Andreev Ye. V. , Nechaev A. N. , Zavyalova Е. G. 
Published: April 2024

A biosensor based on a polyethylene terephthalate track membrane coated with silver nanoparticles is proposed for the detection of influenza A and B viruses using aptamers for specific sorption of the viruses on the membrane surface, as well as for the introduction of a Raman-active or fluorescent label in the complex. The analytical signal was recorded using a Raman spectrometer, observing the effects of surface-enhancing of the intensity of optical responses from the labels.
Competitive effects of substitutions in La<sub>1 – <i>x</i></sub>Sr<sub><i>x</i></sub>Mn<sub>0.9</sub>(Mg<sub><i>y</i></sub>Ge<sub><i>z</i></sub>)<sub>0.1</sub>O<sub>3 + γ</sub> system
Authors: Badelin A. G. , Derzhavin I. M. , Karpasyuk V. K. , Estemirova S. Kh. 
Published: April 2024

Structural, magnetic, and electrical characteristics of La1 – xSrxMn0.90(Mg0.5Ge0.5)0.10O3 + γ (0.15 x 0.30, γ = 0, γ 0) and La0.91Sr0.09Mn0.90Mg0.10O3, La0.71Sr0.29Mn0.90Ge0.10O3 manganites are investigated and compared. Comparison of the properties of manganites having identical summary concentrations of substituents for manganese and equivalent concentrations of Mn4+, Mn3+ ions revealed several competing effects caused by Sr2+(4p6), Mg2+(2p6), Ge4+(3d10) ions and oxygen.
Effect of hydrogenation on the structure and magnetic properties of Tb(Fe,Co)<sub>11</sub>Ti compounds
Authors: Makurenkova A. A. , Zhelezny M. V. , Pankratov N. Y. , Kozlyakova E. S. , Tereshina I. S. , Nikitin S. A. 
Published: April 2024

The effect of hydrogenation on the structure and magnetic properties of TbFe11– xCoxTi compounds with different cobalt content (x = 0, 3, 4, and 5) has been studied. An X-ray diffraction phase analysis was carried out and the parameters of the crystal structure of hydrides were determined. It is shown that hydrogenation leads to an isotropic increase in the unit cell volume. The experimental field and temperature dependence of the magnetization of single crystals hydride are studied in magnetic fields up to 90 kOe in the temperature range 5–300 K. The constants of magnetocrystalline anisotropy are determined.
Electron paramagnetic resonance [Cu<sup>3+</sup>–Cu<sup>2+</sup>](C<sub>2v</sub>) impurity dimers in BaF<sub>2</sub>:Cu ionic crystal
Authors: Zaripov R. B. , Ulanov V. A. , Kalimullin R. I. 
Published: April 2024

Impurity dimers [Cu3+–Cu2+] (С2v) with an antiferromagnetic bond between copper ions have been synthesized in BaF2 crystals. The study of the molecular structure of the synthesized dimers was carried out by the electron paramagnetic resonance at frequencies of 9.3 and 34.2 GHz in the temperature range from 5 to 150 K. It was shown that the 63Cu3+ and 63Cu2+ ions replaced the neighboring cations of the Ва2+ lattice, forming a dimer with a parallel bond axis of one of the 〈110〉 crystallographic axes. It has been found that the coupling between copper ions has an antiferromagnetic exchange interaction and that its repeated inverse state is a doublet, S = 1/2. There were determined parameters of Zeeman interaction, part of the parameters of the hyperfine and quadrupole interaction of 63Cu3+ and 63Cu2+ ions, as well as part of the parameters of the ligand hyperfine interaction with two equivalent F– ions.
Comparative Study of 1,3,5-Trinitrobenzene and 2,4,6-Trinitrotoluene Hydrogenation over Copper-Aluminum Oxide Catalyst in a Flow Reactor
Authors: Nuzhdin A. L. , Shchurova I. А. , Bukhtiyarova M. V. , Plyusnin P. E. , Alekseyeva N. A. , Sysolyatin S. V. , Bukhtiyarova G. A. 
Published: April 2024

The catalytic properties of a copper-aluminum oxide catalyst obtained from double layered hydroxide have been studied in hydrogenation of 1,3,5-trinitrobenzene (TNB) and 2,4,6-trinitrotoluene (TNT) in a flow reactor. The reaction was carried out at temperature of 120°C, total pressure of 30 bar and substrate concentration of 0.10–0.15 M, using methanol as a solvent. 1,3,5-Triaminobenzene (TAB) and 2,4,6-triaminotoluene (TAT) were isolated from the reaction mixture in the form of double salts with sulfuric acid TAB⋅2H2SO4 and TAT⋅2H2SO4, the yield of which was 92 and 98%, respectively. At an initial trinitroarene concentration of 0.10 M, the hydrolysis of triaminobenzene salts made it possible to synthesize phloroglucinol and methylphloroglucinol in 78 and 91% yields. Increasing the concentration to 0.15 M reduces the yield to 71 and 88%, respectively. According to thermal analysis data, the observed differences in the yields of triaminobenzene salts and polyphenols are explained by the formation of different amounts of resinous by-products on the catalyst surface during hydrogenation of trinitroarene. Hydrogenation of TNT produces less resin, resulting in higher yields of TAT⋅2H2SO4 and methyl phloroglucinol. This is probably due to the presence of an electron-donating methyl substituent, which slows down polycondensation of TAT molecules.
Histological Assessment of the Laboratory Rats Skin after Thermal Damages Treated with Nanosecond Microwave Pulses
Authors: Gostyukhina A. A. , Yartsev V. V. , Samoylova A. V. , Bolshakov M. A. , Evseeva S. S. , Mochalova V. M. , Zaitsev K. V. , Kutenkov O. P. , Rostov V. V. 
Published: April 2024

The effect of nanosecond repetitively pulsed microwave radiation (RPMR, 10 GHz, 100 ns pulse duration, 8 Hz pulse repetition rate, 140 W/cm2 peak power flux density (pPFD)) on the treatment of a model thermal burn of the skin of laboratory rats was investigated. It is established that after 4-fold local irradiation, the rate of wound healing increases; it is due to the accelerated formation of granulation tissue and a decrease in the thickness of the scab, which ensures scarless healing.
Multiple Chromosomal Polymorphism in Birch Mice of the Subtilis Group (Rodentia, Dipodoidea, <i>Sicista</i>) from Saratov Right Bank
Authors: Baskevich M. I. , Oparin M. L. 
Published: April 2024

Cytogenetic analysis (routine, G-, C-, AgNOR-chromosome banding) allowed to obtain new data on chromosomal polymorphism in the population (n = 13) of Sicista sp. 1, representative of the Sicista subtilis group from the Saratov Region, right bank of Volga River. It was shown that in the studied polymorphic population of a species from the northern part of the species' range (Voskresensky district of the Saratov region) the diploid number of chromosomes varies from 2n = 22 to 2n = 24, and the number of autosome arms from NFa = 39 to NFa = 44, and the sample includes the following 6 karyotype variants: with 2n = 24, NFa = 44; 2n = 24, NFa = 43; 2n = 23, NFa = 40; 2n = 23, NFa = 41; 2n = 22, NFa = 39; 2n = 22, NFa = 40. Based on G‑banding method, the determined intrapopulation chromosomal polymorphism in Sicista sp. 1 was defined by two chromosomal rearrangements: tandem translocation involving two biarmed autosomes No 4 and 10 and a pericentric inversion of pair No 6. In the studied sample (n = 13), a stable advantage of heterozygotes was revealed for both structural chromosomal mutations and the chromosomal polymorphism is characterized as balanced or heterozygous. The potential role of the identified polymorphism in chromosomal evolution and adaptive strategy of the species is discussed.
Intrabreed Diversity and Relationships between Races of Honey Bee <i>Apis mellifera carpathica</i> and <i>Apis mellifera caucasica</i>
Authors: Triseleva T. A. , Safonkin A. F. , Bykova T. O. , Rukhkyan M. J. 
Published: April 2024

Based on the analysis of 94 sequences of the mtDNA CO1 gene, the intrabreed diversity and evolutionary relationships of bees from Russia, Ukraine, Armenia, Kyrgyzstan, Tajikistan, and Poland were studied. We revealed two main haplotypes corresponding to the races A. m. carpathica and A. m. caucasica, common in the studied regions. However, in Armenia bees of the Caucasian race predominate, and in Poland – Carpathian. A. m. caucasica has higher haplotype diversity: one of its haplotypes is formed by samples of bees from the Crimean mountain breed, possibly an independent race A. m. taurica. There are 2 clusters on the phylogenetic tree: one cluster includes A. m. mellifera and A. m. iberica (evolutionary line M), the other (line C) ‒ A. m. ligustica, A. m. carpathica, A. m. caucasica. Haplotypes of A. m. caucasica have more substitutions per site, indicating their earlier origin compared to A. m. ligustica and A. m. carpathica. According to the time of divergence of A. mellifera and A. cerana at 6 Ma, the divergence of all races of line C is estimated from 1.3 to 0.6 Ma; races A. m. caucasica 0.35–0.25 million, A. m. carpathica – 0.2–0.04 million. When using universal primers with optimization of amplification conditions for the mtDNA CO1 gene region, a nonsynonymous G/A SNP was detected in position 4 (680 bp) which can be used to identify A. m. carpathica from A. m. ligustica.
Basic Limitations of Self-Organisation on Examples of High- and Low-Integrated Very Complex Systems (Mammalian Skeleton Elements and Mammalian Fossil Assemblages): from Empirical Evidences to the Theory
Authors: Puzachenko A. Yu. 
Published: April 2024

A high variety is a characteristic attribute of any material phenomena and processes involving living matter, i.e., very complex systems (VCC). We verified the presence of fundamental constraints on size/shape diversity and self-organization on the example of a mammalian skeleton in four orders (41 species.) The properties of more than 4700 multidimensional descriptive models of VCC were studied. A self-organization index R (0 ≤ R ≤ 1) was calculated for each model, its range of variability was mainly limited to the interval from ~0.10 to ~0.30. The concepts of an abstract Ashby’ regulator and the Shannon-Hartley theorem were used to explain the variation in the empirical data. It was concluded that there are significant constraints on a quality of morphological diversity regulation and the possible level of self-organization of VCCs for steady states.
Diversity of the Red Blood Parameters System in the Pigmy Field Mouse and the House Mouse (Rodentia, Muridae) in the Elbrus Region: Multivariate and Information Analyses
Authors: Emkuzheva M. M. , Puzachenko A. Yu. , Tembotova F. A. , Bottaeva Z. Kh. , Bersekova Z. A. , Chapaev A. Kh. 
Published: April 2024

The variability and evenness (diversity) of the red blood parameters system was assessed for the first time using multivariate and information analysis methods in the synanthropic M. musculus and the hemisynanthropic A. (S.) uralensis in the Central Caucasus Mountains (Elbrus region). The paper introduces the concept of the actual “niche” of the red blood parameters system in the multidimensional space of the descriptive model. The niches of A. (S.) uralensis and M. musculus were clearly differentiated, and the niche volume of A. (S.) uralensis significantly exceeding that of M. musculus. Interspecific differences in the seasonal regulation of blood parameters were described, which in A. (S.) uralensis was more complex and clearly cyclical from “winter” to “autumn” season. The results obtained allowed us to conclude that, compared to M. musculus, A. (S.) uralensis realises a more flexible adaptation strategy to seasonal changes in the environment. The tested methodology of data analysis allows to consider the results of particular studies on mammalian haematopoietic regulation in the broader context of problems of biodiversity, dynamics and self-organisation of biological systems.
Exoparasitic Mites – Vectors of Bacterial Symbionts Among Insects
Authors: Shaikevich E. V. , Gorbacheva A. A. , Romanov D. A. 
Published: April 2024

Inherited endosymbiotic bacteria from the genera Rickettsia, Wolbachia and Spiroplasma cause the death of male offspring in ladybirds (Coleoptera, Coccinellidae). As a rule, bacteria are transmitted through the cytoplasm of the mother’s egg to offspring – vertically. In addition to vertical transfer, there is increasing evidence of horizontal transfer of symbionts between unrelated insect taxa. Insect parasites such as mites can be potential vectors of endosymbiotic bacteria. The parasitic mite Coccipolipus hippodamiae (McDaniel Morrill, 1969) (Acarina: Podapolipidae) occurs in natural populations of Coccinellidae. In this work, the ability of C. hippodamiae to become infected with Wolbachia and Spiroplasma from hosts and to spread bacteria among coccinellid beetles was proven for the first time.
Physical Activity Assessment of Overweight and Obese Physicians
Authors: Fominaitė Martirija , Sipavičienė Saulė , Fominienė Vilija Bitė 
Published: April 2024

Relevance of the topic. Physical activity (FA) is a preventive measure to protect and enhance public health (World Health Organization, 2011), and its insufficiency is associated with several diseases. Meanwhile, a person’s low physical activity is often associated with the risk of being overweight or obese (Chatterjee et al., 2020). Despite this, there is not a lot of scientific data on the physical activity of health care professionals especially doctors who are overweight or obese, results, state the situation when doctors do not follow the recommended physical activity recommendations and are affected by overweight or obesity, are often determined by both the research methodology, the contingent of subjects, and the specifics of the country or region.
The purpose of the study: is to reveal the physical activity habits of overweight and obese physicians.
Research object: physical activity habits.
The results. The conducted study revealed that slightly more than half of the examined doctors are overweight or obese. There are more men than women in these categories of body mass index, and higher readings of obesity are found in those subjects with more than 10 years of work experience. Slightly more than a quarter of the subjects demonstrate unhealthy physical activity habits. In terms of gender, men dominate compared to women. An analysis of overweight and obese physicians based on their physical activity skill category revealed that overweight and obesity among the studied physicians tended to be associated with their physical activity skill category.
Keywords: physical activity, body mass index, obesity, overweight, healthcare professionals.
Formation of an Eﬀective System of Personnel Motivation at Industrial Enterprises of Ukraine
Authors: Savenko Dmytro 
Published: April 2024

It is found that the level of competitiveness of enterprises, and stability of functioning largely depends on the efficiency and results of the work of personnel, and the level of their skills. The quality and timeliness of tasks, production, and the formation of creative ideas depend on the qualifications of employees. Therefore, an important indicator of a company’s staff efficiency at the enterprise is labour productivity, the level which depends on the personnel policy, and the motivation system. It is determined that forms and methods of motivation affects the level of labour productivity, satisfaction with working conditions, interaction, and teamwork. It is determined that at industrial enterprises it is expedient to introduce modern forms of motivation of employees, which will affect not only the quality of staff work, increase interest in the results of work, but also the level of profitability, production, and sales volumes. Likewise, it is proved that the introduction of various forms of stimulation of personnel in a complex will ensure the efficiency of work, and stability of the functioning of the enterpriset is found that the use forms and methods of motivation allows to establishment of the process of personnel management and ensures the efficiency of their work. Among the problems of personnel motivation at enterprises are defined as limited amount of financial support, low level of wages, unfavourable psychological climate in the team, limited access to information data, non-use of indirect methods of motivation, and inefficiency of personnel policy. Recommendations for improving the motivation of personnel at enterprises have been formed: conducting training and webinars for employees; advanced training and training in the field of software application; hiring qualified employees; study of the psychological climate in the team to prevent problems and solve them; improvement of the system of formation of premiums; formation of a social package; promoting self-development and teamwork. It is proved that motivation affects labour productivity, personnel management and the functioning of the firm , work results, and formation of competitive advantages. The system of personnel motivation for industrial enterprises has been improved, which consists of a set of elements and stages of formation, approbation, implementation, and improvement, which will contribute to increasing the effectiveness of employees, and the efficiency of enterprises.
Keywords: motivation, personnel, productivity, industrial enterprises, efficiency, personnel management, personnel motivation system.
Meta-Analysis: The Effect of Self-Regulated Learning (SRL) on Student Ability Levels
Authors: Susanti Dewi Sri , Salsabilla Rania , Hidayati Rahmi 
Published: April 2024

This study aims to identify the Effect Size and Publication Bias of the research results of the relationship of Self Regulated Learning (SRL) to the Student’s Mastery Level with various conclusions. This research is also used to identify the level of positive correlation by Meta-Analysis. The methodology used in this research is a meta-analysis study of 14 research results. In this study, the Effect Size values were obtained in the range of -0.13 to 1.22. Based on the estimated correlation values, which currently stand at 0.498 with a confidence interval of 0.284 to 0.613, it can be said that there is a positive relationship between Student’s Mastery Level and Self Regulated Learning (SRL). In addition, by using the Egger's Test, a p-value of 0.166 > (α = 0.05) was obtained, so that Publication Bias was not detected by the Meta-Analysis study. In general, it can be stated that Self Regulated Learning (SRL) has a statistically significant positive influence on the level of student mastery. The greater the motivation to learn independently, the better the students' academic mastery.
The unseen patient: competing priorities between patients and providers when cannabis is used in pregnancy, a qualitative study
Authors: Gould Erin E. , Ganesh Siddhi S. , Nguyen Ryan Mikeala , Breton Carrie V. , Bastain Theresa M. , Dunton Genevieve F. , Ceasar Rachel Carmen 
Published: April 2024

ObjectivesThis study aimed to explore competing priorities when cannabis is used during pregnancy from the perspective of providers and Black and Latina people. Maternal cannabis use is increasingly common, but patients and providers alike struggle to navigate it.MethodsThis pilot used qualitative, constructivist ground theory methods to conduct semi-structured, remote interviews between 16 November 2021, and 7 February 2022 with 7 Black and Latina people who used cannabis during pregnancy, and 10 providers between 15 March 2022, and 6 April 2022, all of who were in Southern California, U.S.ResultsWe identified three main findings: (1) Providers reported barriers to caregiving and relationship building with patients due to maternal cannabis use stigma, (2) Providers prioritized the fetus despite patients’ current health system challenges that drove cannabis use, and (3) Both patients and providers engaged in personal research beyond the healthcare system to better understand maternal cannabis use.DiscussionOur findings indicate that challenges exist between people who use cannabis during pregnancy and providers. Both groups need accurate, sociocultural sensitive information about maternal cannabis use via a harm reduction lens.
The clinical significance of sarcopenia in patients with hepatocellular carcinoma treated with lenvatinib and PD-1 inhibitors
Authors: Sun Wei , Yin Xue , Liu Xiaomin , Wei Jianying , Yu Minghua , Li Wendong , Ding Xiaoyan , Chen Jinglong 
Published: April 2024

Background and aimSarcopenia has gained considerable attention in the context of hepatocellular carcinoma, as it has been correlated with a poorer prognosis among patients undergoing sorafenib or lenvatinib treatment for hepatocellular carcinoma (HCC). The clinical significance of sarcopenia in first-line advanced HCC patients treated with lenvatinib and programmed death-1 (PD-1) inhibitors needs to be clarified.MethodsSarcopenia was diagnosed using CT (Computed tomography) or MRI (Magnetic Resonance Imaging), with the psoas muscle index (PMI) as the surrogate marker. Patients were grouped based on sarcopenia presences, and a comparative analysis examined characteristics, adverse events, and prognosis. The Cox regression analysis was applied to identify independent prognostic factors for survival, while nomograms were constructed to predict 1-year survival.ResultsAmong 180 patients, 46 had sarcopenia. Patients with baseline sarcopenia demonstrated significantly inferior median progression-free survival (mPFS) (3.0 vs. 8.3 months) and median overall survival (mOS) (7.3 vs. 21.6 months). The same results for mPFS (3.3 vs. 9.2 months) and mOS (9.4 vs. 24.2 months) were observed in patients who developed sarcopenia after treatment. Furthermore, significantly higher grade 3 or higher adverse events (AEs) (73.91% vs 41.79%, p&lt;0.001) were recorded in the sarcopenia group compared to the non-sarcopenia group. In the multivariate analysis, distant metastasis, elevated PLR and CRP levels, and low PMI remained independent predictive factors for poor OS. Additionally, skeletal muscle loss remained a significant independent risk factor for PFS. We developed a nomogram incorporating these four indicators, which predicted 12-month survival with a C-index of 0.853 (95% CI, 0.791 – 0.915), aligning well with actual observations.ConclusionThe prognosis of patients with HCC and sarcopenia is significantly worse when treated with lenvatinib and PD-1 inhibitors. The combination regimen of lenvatinib plus PD-1 inhibitors should be cautiously recommended due to the inferior prognosis and higher AEs.