bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental Study on Supersonic Combustion Characteristics of Al/B-Kerosene Nanofuels
Authors: Fan Wenhui , Zhong Fengquan , Gao Zhanbiao 
Published: April 2024

Aluminum and boron nanoparticles are added to kerosene in this paper to improve the combustion properties of kerosene. When the particle concentration is 30 g/L, the volumetric heat value of fuel increases by 3 and 5%, respectively, with the addition of aluminum and boron nanoparticles. Meanwhile, combustion experiments in a supersonic combustor are conducted to study the combustion characteristics of Al-kerosene nanofuels and B-kerosene nanofuels. The air flow rates of all experiments are about 1.77 kg/s, the total temperature is 1500 K, and the total pressure is 1.2 MPa. The combustion flow and flame structures of kerosene with different particles and different concentrations are studied, and the results indicate that the addition of nanoparticles to the fuel enhances combustion and heat release enhanced, and the flame stabilization mode is changed from the cavity stabilization to the jet-wake stabilization mode with a higher particle concentration. Meanwhile, the unsteady characteristics of flame are studied. The flame oscillation is intensified, and the fundamental frequency of the flame increases with the increase in particle concentration. Besides, the addition of nanoparticles significantly improves the combustion efficiency of kerosene. When the particle concentration is 30 g/L, the combustion efficiencies of nanofuels are increased by 15% and 17.5%, respectively, with the addition of aluminum and boron nanoparticles.
Significance of single-nucleotide variants of anorexigenic hormone genes in childhood obesity
Authors: Nikulina A.O. 
Published: April 2024

Obesity-induced dysregulation of hypothalamic neurons is not completely eliminated by restoring body weight, therefore the most urgent task of modern precision medicine is to predict the trajectory of development of metabolic disorders associated with obesity in children. The aim of the study was to determine the level of association of single-nucleotide variants of genes that determine eating behavior – Neuronal growth regulator 1, Fat mass and obesity associated gene, Glucagon-like peptide-1 receptor, ghrelin, leptin receptor, cholecystokinin, in the development of metabolically unhealthy obesity. 252 obese children aged 6-18 years were examined. The main group (n=152) consisted of children with metabolically unhealthy obesity (MUO) according to Identification and prevention of Dietary- and Lifestyle-induced Health Effects in Children and Infants 2014 criteria. The control group (n=100) consisted of children with metabolically healthy obesity (MHO). All children underwent a general clinical, immunobiochemical examination at the Synevo laboratory (Ukraine). Whole-genome sequencing (CeGat, Germany) was performed in 31 children of the primary and 21 children of the control group. Static analysis: variance analysis ANOVA, method of estimating data dispersion, ROC-analysis, method of testing statistical hypotheses. The level of single nucleotide variants association of anorexigenic hormone genes with MUO that exceeded the threshold accepted by 75% of the available data was, respectively, in ascending order: leptin receptor (LEPR) rs1137101 (40.38%), Glucagon-like peptide-1 receptor (GLP1R) rs1126476 (40.38%), GLP1R rs2235868 (42.31%), GLP1R rs1042044 (42.31%), LEPR rs3790435 (48.08%), cholecystokinin (CCK) rs754635 (50%), LEPR rs2186248 (55.76%), GLP1R rs6918287 (55.76%). Genotypes of the GLP1R gene, such as CC rs10305421 determine insulin resistance (F=5.6); GA/AA rs3765468 – meta-inflammation (F=5.8); AA rs6918287 – basal hyperglycemia (F=6.3) and triglyceridemia (F=51.3), p<0.05. Single-nucleotide variants of the gene GLP1R rs6918287, LEPR rs2186248, CCK rs754635 of the anorexic hormones that control eating behavior are highly associated with the presence of metabolically unhealthy obesity in children.
Chronic Ethanol Decreases the Left Ventricular Cardiac Performance
Authors: Camargo VMB , Damatto FC , Fioravante VC , Godoi AR , Stoppa EG , Okoshi MP , Okoshi K , Miranda JRA , Martinez FE 
Published: April 2024

Introduction: Spaced fiber bundles, less evident cell striations, deposition of collagen fiber bundles, and increased presence of fibroblasts in the cardiac tissue of rats that voluntarily and chronically ingested ethanol were observed by our research group. In addition, we observed increased proliferation and cell death of cardiomyocytes. To find out whether these changes lead to impaired heart functionality, some clinical tests were performed. Aim: to investigate whether chronic ethanol decreases the left ventricular performance assessed by exercise testing, electrocardiogram, and echocardiogram of male and female UChB strain rats. Material and methods: ten adult males and ten adult females, Wistar strain rats, named UChB (University of Chile), spontaneous high ethanol drinkers (consumption greater than 2 g ethanol / Kg body weight/day), and ten male UChB rats and ten adults female UChB rats, not exposed to ethanol, UChBC rats (controls) were used. Cardiac performance was evaluated by the stress test, electrocardiogram, and echocardiogram. Results: Exposed females showed ventricular morphological changes in the heart. The exposed females and males had the highest heart relative weight with females being larger than males. The exposed females showed altered electrocardiogram and echocardiogram. Conclusion: Chronic ethanol decreases the left ventricular cardiac performance in rats. Females are more sensitive to changes in cardiac electrical conduction.
Study of the features of zoobenthos development in the area of water air curtain type fish protection structure in the cooling reservoir of the SDPP
Authors: Kalaida M. L. , Saetov A. R. , Khamitova M. F. 
Published: April 2024

PURPOSE. Study of the features of hydrobiological characteristics of zoobenthos development under conditions of an operating fish protection structure of a water-air curtain (WAC ) type at an energy facility. METHODS. Hydrobiological material on the qualitative and quantitative composition of zoobenthos in the water intake area of the Zainskaya State District Power Plant was collected, processed and analyzed. Particular attention is paid to the level of development of the biofouling agent - Dreissena, and the acclimating species, the Khanka shrimp. A comparative analysis of our own research and literature data on hydrobiological indicators of water quality according to the level of development of zoobenthos in the area of a fish protection structure such as a water-air curtain was carried out. The material was processed using generally accepted hydrobiological methods in the laboratory of the Department of Aquatic Bioresources and Aquaculture of Kazan State Power Engineering University. RESULTS. It is shown that a fish protection device like a water-air curtain (WAC) is a technical solution that, in the process of operation, changes the physical and chemical characteristics of the state of the ecosystem, especially in the bottom layer and soil, thereby shaping the characteristics of zoobenthos. It was revealed that a fish protection structure (FPS) like a water-air curtain does not reduce the species diversity of zoobenthos It has been shown that the WAC zone does not prevent the reproduction of Dreissena, but leads to a decrease in their numbers from 2 to 5 times compared to FPS with mesh cassettes, which increases the environmental significance of the WAC from the standpoint of combating biofouling on hydraulic structures. CONCLUSION. Observations of the state of the ecosystem in the area of operation of the water-air curtain and assessment of water quality based on zoobenthos indicators revealed high water quality in the area where the water-air curtain operates and an improvement in the ecological situation.
Perspectives of using syngas in gas turbine plants
Authors: Novoselova M. S. , Mingaleeva G. R. , Marin G. E. , Titov A. V. 
Published: April 2024

RELEVANCE. The insufficiently wide scope of gas turbine plants (GTP) is associated with the lack of widespread availability of gas pipelines supplying the main fuel – natural gas. Interest in alternative fuels and the search for the most suitable ones in order to switch from traditional energy sources has increased intensively over time. Currently, there are methods of gasification of solid fuels that expand not only the possibilities of using the fuel itself, but also pushing the boundaries of the applicability of GTP both in terms of production specialization and geographical location. Coal is the most affordable energy resource in the world, due to its prevalence, but its limited use in modern energy facilities is due to the worldwide policy of decarbonization of energy. Coal gasification makes it possible to increase energy characteristics and reduce emissions of harmful substances into the atmosphere when using coal. PURPOSE. Determination of the efficiency and expediency of using generator gas obtained from coal in gas turbine plant, as well as consideration of the possibility of its modernization. METHODS. To achieve set goal, an automated system of gas dynamic calculations of energy turbomachines (AS GDCET) will be used, which will calculate a mathematical model of a gas turbine installation and conduct numerical studies when characteristics change, as well as using a module for approximating the component composition of fuel. The research is carried out when the electric load of a gas turbine plant of the NK-16-18 ST type changes in the range from 15 to 18 MW. RESULTS. According to the results of the study, the dependences of the total hourly and specific fuel consumption, effective efficiency, temperature in the combustion chamber and at the outlet of the power turbine on changes in the electric load of the gas turbine installation were obtained. Having a lower calorific value, the expected synthesis gas reduces the electricalefficiency of the gas turbine engine, which is expressed in a decrease in efficiency by 3-4.5 %. At the same time, fuel consumption increases by about 4-5 times, which depends on the component composition of the fuel. At the same time, the temperature values at the exhaust of the gas turbine change by 26-37 °C. CONCLUSION. The use of synthesis gas as fuel for a gas turbine plant can provide sufficient efficiency in generating electric energy, but its use is rational only in situations of absence or unavailability of traditional gaseous fuels. The development of gasification technologies will increase the efficiency of use and reduce the cost of synthesis gas production. This will allow the introduction of gasification technologies at existing facilities and expand the scope of synthesis gas applications, which will ensure increased interest in this area among potential investors.
Thermal and aerodynamic characteristics of air cooled condenserfor steam turbine power unit
Authors: Borush O. V. , Grigoryeva O. K. , Frantseva A. A. 
Published: April 2024

THE PURPOSE. Increased water consumption at power plants leads to a deterioration of the environmental situation not only in countries with limited water supply sources, but also in countries with significant reserves of fresh water. There is a need to consider the possibility of using an air condenser as an alternative use in industrial water supply systems at a power plant. To present a methodology for calculating the main characteristics of a condenser (condensation and reflux sections), to estimate the aerodynamic resistance and fan power for an air-cooled condenser as part of a steam turbine power unit. Determine the influence of air temperature and pressure in the condenser on the calculation of the air condenser. To develop recommendations for the selection of parameters of air condensers operating as part of steam turbine power units. METHODS. Methods for designing heat exchangers, modeling and intensifying heat exchange processes were used in the course of calculating an air condenser unit. RESULTS. A method for calculating an air-cooled condenser for a 110 MW condensing turbine has been developed. The analysis of the calculation of the heat transfer coefficient is given. The analysis of the values of the heat exchange area of the condensing unit is presented. The effect of pressure in the condenser on the main calculated characteristics of the condenser is shown. Recommendations for the selection of the fan capacity in the condenser and the design temperature of the cooling air have been developed. CONCLUSION. The issue of using air coolers in the power industry is still poorly covered in the literature, however, environmental problems and the shortage of fresh water are becoming more and more urgent all over the world. The development of air-cooling systems is a very topical issue for modern power engineering. It is shown that for stationary installations of condensation of water vapor, the most suitable is the hipped-roof arrangement of the heat-exchange sections with the lower arrangement of the fans. Quantitative estimates of the change in the heat transfer coefficient and the area of the heat-exchange surface are given for the pressure range of 8…20 kPa. The power consumption of the fan depends significantly on the temperature of the cooling air and the vacuum in the condenser.
Identification of candidate genes associated with growth and development of sheep from a crossbred population using genome-wide association studies
Authors: Deniskova T. E. , Koshkina O. A. , Petrov S. N. , Sermyagin A. A. , Zinovieva N. A. 
Published: April 2024

The article presents the results of a search for genome-wide associations with phenotypic traits characterizing the growth and development of sheep from a crossbred population obtained from crossing Romanov sheep and F1 hybrid rams (Romanov sheep x Katahdin). The phenotype database included ten body measurements (withers height, sacral height, back height, chest depth, chest width, ischial tuberosity width, body length, oblique body length, chest girth, pastern girth) recorded at the age of 6 days, 3, 6 and 9 months. Genotyping of sheep was carried out using high-density DNA chips containing about 600,000 SNP markers. Genome-wide association studies (GWAS) were performed using regression analysis in the STATISTICA 10 program. The search for candidate genes localized in the SNP region was performed using Ensembl genome browser 110. There was carried out an analysis of the matches of the identified SNPs with known quantitative trait loci (QTLs) described in the Sheep Quantitative Trait Locus Database. There were found SNPs that were significantly associated with the studied phenotypic traits overlapped with the QTLs, among which the most common categories were “Body weight (slaughter)”, “Muscle weight in carcass”, “Body weight (live)” and “Bone weight in carcass”. There has been established that SNPs significantly associated with exterior traits were localized within or in the immediate vicinity of 64 genes. There were found potential candidates regulating the growth of muscle (FOXO3, PRKAG3, MYOZ2, and ANKRD1) and cartilage tissues FGF12) and involved in metabolic processes, which were critical for the growth of lambs (CLDN, ALB, and MRC1). Along with the known in sheep functional candidates (CAST and SCD5) , there were identified genes that were not previously described in sheep, but regulated growth and development processes in other livestock species including genes RAB28, PRKAG3 and FOXO3. The identified SNPs can be recommended for inclusion in marker-guided selection programs in sheep breeding.
Barriers and Opportunities in the Discoverability and Indexing of Student-Led Academic Journals
Authors: Maistrovskaya Mariya 
Published: April 2024

Introduction: Student-led journals are not commonly included in academic indexes and databases. This study explores the barriers that indexing requirements may present for student journals, as well as editors’ attitudes toward discoverability strategies and opportunities.
Methods: An environmental scan of select eight indexes looks at potential barriers to inclusion and at indexing rates among Canadian student-led journals (n = 202). A survey of Canadian student editors (n = 47) and follow-up interviews (n = 7) focus on editors’ attitudes toward discoverability, indexing challenges, and opportunities.
Results: Only 15% (n = 30) of Canadian student journals are indexed in at least one of the seven indexes included in this study, and 74% (n = 146) of open-access journals appear in Google Scholar, with Open Journal Systems (OJS) having the highest Google Scholar indexing rate (97%) as a platform. Student editors generally prioritize reaching their audiences via social media, word of mouth, and targeted promotion. For editors who seek indexing, the biggest challenges come from confusing inclusion criteria and processes, lack of knowledge and comfort, and lack of capacity for such projects.
Discussion: Most reviewed indexes have some requirements that may be challenging, but not exclusively to student journals. The main challenge comes from editors’ self-perception of not belonging in academic indexes, lack of understanding about the process, and insufficient capacity for discoverability and promotional activities.
Conclusion: The lack of discoverability puts student journals at risk of being invisible to readers and potential authors. Although academic indexing may not be a high priority for student editors, regular outreach and support from libraries and faculty advisors could help editors better use various discoverability opportunities.
Advances in Electrochemical Sensing of Depression Biomarker Serotonin: A Comprehensive Review
Authors: Shambhavi  , Priyadarshni Puja , Kumari Nisha , Kumar Ratnesh 
Published: April 2024

The present review deals with detection of serotonin (5-HT) by electrochemical techniques using various modified electrodes. Serotonin is an important monoamine neurotransmitter, psychoactive agent, and bioactive component. Its detection has a very significant contribution in diagnosing and treating many neurological diseases. Electrochemical techniques provide simple, fast, high selective, sensitive, reproducible, and the low-cost method for the determination of 5-HT. We have extensively reviewed the recently developed approaches in which serotonin has been sensitively detected using modified electrodes even in the presence of interfering agents. The analytical characteristics such as linear range and detection limit on various modified electrode have been compared in the review.
Associations of type D personality with amplitude-time ECG parameters
Authors: Kremleva O. V. 
Published: April 2024

Negative affectivity (NA) and social inhibition (SI) inherent in type D personalities produce chronic distress, which leads to an increased risk of developing cardiovascular disease (CVD). Currently, a search is underway for mechanisms that mediate the psychosomatic connections of a type D personality. The purpose of the study is to identify the features of amplitude-time ECG parameters in type D personalities and to establish associations of amplitude-time ECG patterns in a non-cardiological sample of women with type D indicators and its components — NA and SI. ECG records were obtained from 68 women with gynecological pathology without a history of CVD and at the time of the study, and all of them completed the questionnaire DS 14. Personality type D was confirmed in 39.7%, on the ECG recording in this group, the average amplitude of the R wave, the duration of the QT and RR intervals turned out to be significantly higher than in individuals without type D, and the duration of the QRS complex was significantly lower in the group of respondents with higher scores against a group with low scores. The group with higher NA values showed a significantly higher R wave amplitude, and with higher SI values, a significantly shorter QRS duration than the corresponding groups with low values of these D-type components. More than a third of a non-cardiac sample of women exhibits type D personality. Analysis of amplitude-time ECG patterns in type D personalities indicates increased ventricular excitability and excessive sympathetic reactivity. A specific pathogenic contribution of the synergism of negative affectivity and social inhibition of the expression of negative feelings to the functional organization of electrophysiological processes in the myocardium was found. Amplitude-time ECG patterns of type D individuals indicate an autonomous imbalance of cardiovascular reactivity at the basis of increased vulnerability to CVD.
Presentation of a clinical case of the logopenic form of the syndrome of primary progressive aphasia in the onset of Alzheimer’s disease
Authors: Kotsiubinskaya Yu. V. , Kaigorodtsev M. A. , Sitnik L. I. , Mikhailov V. A. , Kolesova Yu. P. 
Published: April 2024

A description of a clinical case of the logopenic form of the syndrome of primary progressive aphasia in the onset of Alzheimer’s disease is presented. The disease manifested itself in the form of speech and writing disorders, a sharp disorder in labor skills with the preservation of self-service and orientation, affective fluctuations, in connection with which it was supposed to diagnose cognitive functions, psychopathological changes and instrumental research. Differential diagnostics with mental spectrum diseases, various neurodegenerative diseases, vascular lesions of the brain were carried out. However, the nature, as well as the existing features of cognitive impairment and speech impairment of the manifestation of the disease, suggested a logopenic warrant of the PPA syndrome, and the presence of a general cognitive decline and disease progression in a short time was Alzheimer’s disease with an atypical onset.