bluuebunny/crossref_metadata_2025 huggingface dataset:
Anisotropy of mechanical properties of celecoxib crystal: nature and features from the point of uniax-ial deformations modelling
Authors:   South Ural State University, Chelyabinsk, Russia, Matveychuk Yu. , Yurchenko A. , Bartashevich E.
Published: December 2024

The theoretical study of mechanical properties of the celecoxib (4-[5-(4-Methylphenyl)-3-(trifluoromethyl)pyrazol-1-yl]benzenesulfonamide) crystal structure of polymorph III (s.g. P–1) was carried out in this work. For this purpose, increasing uniaxial deformation of the crystal structure along three axes of the crystal cell was simulated. To obtain the equilibrium structure of this crystal and structures under tensile deformations, quantum-chemical calculations with periodic boundary conditions by the DFT method at the PBE0/pob-DZVP2 level, and by the 3-corrected Hartree–Fock method with the following semiempirical corrections: Grimme correction of dispersion interactions (D3) for weak interactions, basis set superposition error removal by atom-pair wise geometrical coun-terpoise correction (gCP), and correction of short-ranged basis set incompleteness effects (SRB). It was found that the analysis of stiffness tensor of the equilibrium form only does not provide the com-plete information about crystal mechanical behavior in different spatial directions, although this analysis made possible to determine flexibility signs of the celecoxib structure in the (001) plane. In this case, the direction of maximum resistance of the structure to uniaxial deformation is not deter-mined by specific intermolecular bonds and/or chains, but is oriented almost parallel to the plane of conformationally rigid phenyl and pyrazole rings of the celecoxib molecule. The virtual tensile test has allowed to predict the manifestation of elastic properties of the celecoxib crystal in the (001) plane, up to 15% stretching along the crystallographic axes a and b. At greater deformation along the a axis, a “non-healing” cavity is formed, which corresponds to the experimental observation of crys-tal transition to a brittle state. Analysis of the tensile test results has confirmed the reliability of pre-viously proposed brittleness/plasticity/elasticity signs for the prediction of dynamic mechanical properties, using the celecoxib crystal as example.
Unusual reaction of triphenylantimony with 2,3-difluorobenzoic acid in the presence of tert-butyl hydroperoxide
Authors:   South Ural State University, Chelyabinsk, Russia, Sharutin V.
Published: December 2024

The interaction of triphenylantimony with 2,3-difluorobenzoic acid in the presence of tert-butyl hy-droperoxide (molar ratio 1:2:1) in ether yielded 12 % tetraphenylantimony 2,3-difluorobenzoate (1), which was identified by IR spectroscopy and X-ray structural analysis. X-ray diffraction analysis was performed on a D8 QUEST diffractometer from Bruker. The crystallographic characteristics of the unit cell of the compound are as follows: space group P-1, a = 9,859(6), b = 10,180(6), c = 14,332(9) Å, α = 84,15(2)°, β = 83,09(2), γ = 68,56(4)°, V = 1326,6(14) Å3, Z = 2, ρcalc = 1,470 g/cm3,  = 2,079 mm–1, F(000) = 588.0, crystal size 0,32×0,2×0,09 mm, data collection range for 2θ deg: 5,7461,36, index range –14 ≤ h ≤ 14, –14 ≤ k ≤ 14, –20 ≤ l ≤ 20, number of measured reflections 83031, number of independent reflections 8118, Rint = 0,0387, GOOF = 1,037, number of parameters 325, R1 = 0,0287, wR2 = 0,0597. According to X-ray diffraction data, the antimony atoms in the compound have a distorted trigonal-bipyramidal coordination with the oxygen atom of the carboxylate group in the axial position. The axial angle СSbO is 177,90(5)º. The sum of the equatorial angles CSbC is 357,04(9)°,
the Sb–Ceq distances [2,119(2), 2,124(2), 2,126(2) Å] are significantly shorter than the Sb–Sax [2,164(2) Å] and Sb–O [2,2799(18) Å] bond lengths. The organization of molecules in the crystal of compound 1 is due to hydrogen bonds and C∙∙∙H π-interactions of the rings of the aryl and carboxyl ligands. Complete tables of atomic coordinates, bond lengths, and bond angles have been deposited with the Cambridge Crystallographic Data Center (No. 2217060; deposit@ccdc.cam.ac.uk or http://www.ccdc.cam.ac.uk/data_request/cif).
Exploring the dynamics of dragon fruit production and its constraints in southern states of India
Authors: Akhil NK , Prahadeeswaran M , Shivakumar KM , Sivakumar V , Selvi RG
Published: December 2024

Dragon fruit, or pitaya, has become famous owing to its unique look, health advantages, and resilience to diverse climates, rendering it especially appropriate for Southern India. This study investigates the economic feasibility and production challenges of dragon fruit farming in Andhra Pradesh, Karnataka, and Tamil Nadu in 2024. Financial assessments using Net Present Value (NPV), Benefit-Cost Ratio (BCR), and Internal Rate of Return (IRR) indicate that dragon fruit farming is profitable in these states, with Andhra Pradesh and Karnataka showing better financial outcomes compared to Tamil Nadu. Garrett's Ranking Technique was employed to identify and rank the production and marketing constraints. Key production challenges in Tamil Nadu and Andhra Pradesh include the high cost of installation materials and insufficient technical support, while Karnataka primarily faces a shortage of skilled labor. On the marketing front, the absence of adequate cold storage facilities and high transportation costs pose significant hurdles across all states. The findings highlight the need for targeted solutions, such as improving access to affordable installation materials, upgrading cold-storage infrastructure, and implementing training programs for farmers. Addressing these challenges can enhance the profitability and sustainability of the dragon fruit industry in Southern India.
Phytochemical profiling of Mango ginger (Curcuma amada): A comprehensive review of bioactive compounds and health implications
Authors: Barman P D , Rajasree V , Mohanalakshmi M , Renuka R , Meenakshi P
Published: December 2024

Mango ginger (Curcuma amada) is a rhizomatous plant of the Zingiberaceae family and has gained considerable attention because of its unique flavor and potential health benefits. The plant was widespread throughout the tropical regions of South and Southeast Asia in both wild and cultivated environments for its cure for respiratory, skin, and digestive diseases. Traditionally, mango ginger has been utilized in various ethnic medicinal practices and documented in classical medical texts such as Ayurveda, Unani, and Siddha for its therapeutic properties, including the treatment of respiratory disorders, digestive issues, and skin ailments. Phytochemical analyses have shown various bioactive compounds, including curcuminoids, terpenoids, and flavonoids, which possess various biological activities such as antioxidant, anti-inflammatory, antimicrobial, and anticancer activity. This review presents an in-depth review of the prevalence, distribution, traditional uses, and phytochemical characteristics of mango ginger while emphasizing its pharmacological potential. It also highlights the requirement for future research to uncover the molecular mechanisms involved in producing therapeutic effects to improve delivery methods, and to explore possible synergies with other bioactive compounds. Its findings provide evidence supportive of the development into a functional food, dietary supplement, and medicinal agent. This review synthesizes existing research on the phytochemical profiling of mango ginger, focusing on its bioactive compounds and applications in various industries.
Phenotypic evaluation of Ptb 33 introgressed rice lines for resistance to brown planthopper, Nilaparvata lugens (Stål)
Authors: Logeshwari SM , Soundararajan RP , Sheela Venugopal , Suresh R , Sudha M
Published: December 2024

Brown planthopper (BPH), Nilaparvata lugens (Stal) continues its dominantce as an important pest in rice and cause considerable yield loss. Ptb 33 is a well-known source of resistance to BPH. Introgressed lines from Ptb 33 were evaluated against BPH using various parameters of resistant mechanisms. Initial screening was done by protray and modified seedbox screening tests. Eight entries illustrate resistance to BPH in mass screening. Further experiments assessed the mechanisms viz., antibiosis, antixenosis and tolerance in selected resistant entries. Antibiosis studies revealed reduced honeydew excretion, lower nymphal survival rates and prolonged developmental periods in resistant lines compared to the susceptible check. Antixenosis was evaluated through nymphal settling preference tests, with resistant entries showing reduced BPH attraction over time. Tolerance parameters, including Functional Plant Loss Index (FPLI) and Plant Dry Weight Loss Index (PDWLI), indicated varying levels of resistance among the introgressed lines. Among the entries identified as resistant through screening, FSR-3 exhibited strong resistance across all three mechanisms, while X21302-145 showed excellent antibiosis but poor tolerance character. Correlation analysis revealed significant interrelation between various resistance parameters. The study identifies promising BPH-resistant rice lines and elucidates their underlying resistance mechanisms, contributing valuable insights for rice breeding programs in developing durable BPH-resistant cultivars.
A novel stereoscopic mode of planting and breeding shed
Authors: Hua Yanbin , Ong Pei Ying , Tran Chi Nhan , Lee Chew Tin , Nagasaka Ken
Published: December 2024

A novel stereoscopic mode of planting and breeding shed has been designed. The shed body comprises of a steel frame structure inserted with 4 transverse beams along the length direction of the shed through the middle part of the shed body. The transverse beams are covered with a partition. The top of the shed body is covered with 300 and 80 solar panels, while the lower and upper sides are covered with the first and second transparent materials. The partition is provided with 200 and 40 breeding cages, where the 200 and 40 manure drains connected to the breeding cages (each manure drain connected to one breeding cage) are vertically arranged under the partition. The 2 manure collection pipes are connected to the manure drains at a slope of 60?. The transverse beams have 80 adjustable hammocks, which serve as space-saving hanging pots to grow plants. The lower side of the partition is provided with eighty spray heads through the pipes. The inner side of the shed body is provided with twenty heating devices. The novel planting and breeding shed can effectively utilize space, achieving the recycling of resources and waste, maximizing economic benefits and realizing the concept of low-carbon and green environmental protection.
Associations between forest harvest scheduling and artificial intelligence
Authors: Bettinger P. , Rasheed K. , Maier F. , Merry K.
Published: December 2024

Contemporary tactical forest harvest scheduling efforts address planning problems that generally have an economic or commodity production objective, accounting routines to accumulate outcomes or to assess the extent of forest conditions, and constraints (policy or resource) that limit
the assignment of management actions to subdivisions of a forest (stands or strata). Operations research methods have proven useful for addressing these problems and providing guidance, in the form of a harvest schedule, to people managing forests. Heuristic search and simulation methods have
also shown promise for addressing these types of problems. Artificial intelligence includes some of these forms of search processes. When concepts of learning, adaptation, and emulation of human thought describe certain search processes, they can be considered under the broad umbrella of artificial
intelligence. In this work, many of the operations research, heuristic search, and simulation methods that have been demonstrated as useful for forest harvest scheduling efforts are assessed for their association with artificial intelligence. In some cases, it is argued that the forestry profession
has been using artificial intelligence for quite some time to develop tactical forest harvest schedules.
Participatory forest management as an approach to forest management and conservation: a case study of Al-Dalu and Al-Tomama Natural Forests in Sharg Al-Neel Locality, Khartoum State, Sudan
Authors: Elzubair A.E.M. , Fadual S.M. , Elkarium M. Awad
Published: December 2024

The study investigated the effect of a Participatory Forest Management (PFM) approach to conservation and management of forests resources in Sharg Al-Neel Locality, Sudan. Three methods for data collection were employed; households' head survey (HHHs), land use land cover change detection
by using Landsat imagery, and direct field observation. The study highlighted the important role that natural forests in the study area play through their provision of socioeconomic and ecological benefits to local communities. The analysis of satellite imagery revealed that vegetation cover
in the study area increased by 38.8% between 2010 and 2021. Social survey results indicated that programmes aimed at afforestation and reforestation, awareness raising, and the provision of alternative energy sources and building materials in order to reduce the dependency on the natural forests,
are the main factors that have had a positive impact on the improvement of forests' status. Capacity building by NGOs and intergovernmental organizations is necessary for local communities to adopt PFM in Sudan and thereby help the country achieve its Sustainable Development Goals.
Turizm tanıtım faaliyetlerinde Türk mutfak kültürüne ait unsurların incelenmesi
Authors: Kaman Gizem Sultan
Published: December 2024

Successful destination marketing involves national and international advertising activities for domestic and international tourism. Promotional bulletins prepared by the relevant ministry every three months, the "Home: Turkey" campaign and the "GoTürkiye" platforms are some of these activities. This study aims to examine the elements of Turkish culinary culture in tourism advertisements. The research was limited to the "Go Turkey" platform. The data for the study was obtained through document review. The general scan conducted on the platform found elements of Turkish culinary culture under the headings of Sustainable Experiences, All Turkey Experiences and GoTürkiye. Although information and routes regarding different types of tourism, such as cultural, sports and adventure tourism, are shared on the platform, Turkish cuisine is highlighted under different headings by presenting gastronomic items to users on a separate page. In addition, the findings show that the gastronomic elements of Gaziantep, Hatay and Afyonkarahisar provinces, as well as Istanbul, Bodrum and Izmir, which are included in the creative cities network in the field of gastronomy by UNESCO, have been highlighted.
Türkiye ve AB üyesi ülkelerin e-devlet performanslarına göre kümelenmesi: SD tabanlı SAW yöntemiyle değerlendirilmesi
Authors: Eren Hande , Gelmez Emel
Published: December 2024

With the development of technology, significant transformations have occurred in providing services to citizens by governments or states. In this process, the practical determination of the countries' e-government practices can be considered an important issue. In this context, the primary purpose of this study is to determine the e-government performances of Türkiye and the European Union (EU) countries by utilising Multi Criteria Decision Making (MCDM) methods. The study employed the E-government Development Index (EGDI) to align with its primary purpose. In this context, three criteria were used: online service index, human capital index and telecommunication infrastructure index. In order to determine the e-government performance of the countries, cluster analysis was first performed. WEKA program was used to implement the cluster analysis. As a result of the analyses, it was determined that Türkiye and 28 EU member countries were divided into 4 clusters in terms of e-government performance. The most consistent results among the applied algorithms were obtained from the EM algorithm. According to the results of the EM algorithm, the criteria averages were calculated for each cluster, and a new decision matrix was obtained with three criteria and four alternatives (clusters). The SD (Standard Deviation) method weighed the criteria for this new decision matrix. Applying the SD method, the criterion with the highest importance level was determined as the online service index. Then, the clusters were ranked among themselves with the SAW (Simple Additive Weighting) method. According to the results of the SAW method, it was determined that Cluster 1 had the best performance in terms of e-government performance; Cluster 1 was followed by Cluster 0, Cluster 3 and Cluster 2, respectively.
Avrupa Birliği'nde sıvılaştırılmış doğal gaz: Rusya-Ukrayna krizi ve sürdürülebilirlik
Authors: Akar Başak Gül , Ekiz Fatma Merve
Published: December 2024

The Russia-Ukraine crisis has been both a test and a turning point for a sustainable transformation in the energy economy of the European Union (EU). The crisis has brought energy security and Europe's dependence on energy resources back to the agenda, forced a review of the EU's energy policies, and led the EU to look for alternatives in energy supply security and policy orientations. In this context, liquefied natural gas (LNG) is a prominent alternative in the energy transition process. In this study, the effects of the Russia-Ukraine war on the energy security and foreign policy of the EU are investigated using a comparative research method; the importance of LNG is evaluated within the framework of energy diversification strategies to strengthen energy infrastructure, supply security, transition to renewable energy and energy efficiency goals.
Alkol bağımlılığının bireylerin sosyal ve ekonomik yaşamına etkisi
Authors: İştar Işıklı Emel
Published: December 2024

This study aims to understand the impacts of alcohol addiction on individuals' social and economic lives. Semi-structured interviews were conducted with 15 alcohol-dependent participants residing in Düzce, and demographic data were collected and analysed through content analysis. The average age of participants is 43.46, predominantly comprising men. Reasons for alcohol use were associated with multifaceted factors, including social circles, familial influences, and personal curiosity. During the interviews, participants articulated the adverse effects of alcohol consumption on family relationships, education, health, and work life. Furthermore, experiences of stigmatisation and exclusion resulting from alcohol addiction in social life were emphasised. Participants highlighted the importance of social environment, family support, and awareness-raising in preventing addiction. The findings reveal the complex nature of alcohol addiction on both individual and societal levels and underscore the necessity for a holistic approach to combating addiction.
Vardiyalı çalışmaya yönelik tutumun iş yaşam dengesine etkisinde kariyer tatmininin aracı rolü: Sivil havacılık sektörü örneği
Authors: Mumlu Karanfil Seda
Published: December 2024

Objective: This study conducted in the aviation sector aims to determine the effect of employees' attitudes towards shift work on their career satisfaction and work-life balance and whether career satisfaction has a mediating role in the impact of attitudes towards shift work on work-life balance. Method: Data were obtained from 323 shift workers with a questionnaire from quantitative methods and analyzed with Smart PLS. Results: As a result of the analysis, a positive attitude towards shift work hurts not having time for oneself and neglecting life, which has a positive effect on work-life harmony and a negative effect on career satisfaction. A negative attitude towards shift work positively affects not having time for oneself, neglecting one's life, and having a life of work, and negatively affecting work-life harmony. In addition, a partial mediating role of career satisfaction was found in the effect of a positive attitude towards shift work on lack of time for oneself and work-life adjustment. On the other hand, a partial mediating role of career satisfaction on the effect of negative attitude towards shift work on not having time for oneself and work-life adjustment and a fully mediating role of career satisfaction on neglecting life and having life consisting of work was found.
Особливості застосування підходів фізико-хімічної механіки для оцінювання крихкості феритно-перлітних сталей
Authors: Богданов В. Л. , Назарчук З. Т. , Звірко О. І.
Published: December 2024

В статті встановлено низку нових аспектів у застосуванні підходів механіки для оцінювання крихкості феритно-перлітних сталей з огляду підвищення ризиків порушення цілісності газопроводів, пов’язаних з транспортуванням водню у  рамках  розвитку  водневої  енергетики  України.  Опрацьовано  механізм дії спричинених воднем напружень як чинників деформаційного старіння та мікропошкодженості деформаційної природи у низькоміцних сталях. Показано високу ефективність використання підходів нелінійної механіки руйнування для оцінювання стану сталей з урахуванням деструктивного впливу вод- ню та умов експлуатації. Значну увагу надано особливостям реалізації механізму декогезії у міжфазному розшаруванні сталей.
Генерування зондувального імпульсу напруження в металевому стрижні шляхом імпульсного опромінення торця
Authors: Жук Я.О. , Сенченков І.К. , Мельниченко М.М.
Published: December 2024

В рамках постановки зв’язаної задачі термомеханіки з використанням термодинамічно узгодженої моделі нелінійної поведінки матеріалу досліджується можливість генерування зондувального імпульсу напруження в металевому стрижні шляхом опромінення його торця лазерним імпульсом або імпульсом електронного променю. Задача розв’язується чисельно в динамічній постановці із застосуванням скінченноелементної методики, розвиненої для моделювання зв’язаної термомеханічної поведінки фізично нелінійних матеріалів з врахуванням температурної залежності властивостей. Дія теплового імпульсу моделюється заданням теплового потоку через границю тіла. Вивчаються зв’язані термомеханічні процеси в області опромінення і по довжині стрижня, характеристики згенерованого імпульсу напружень, процеси поширення імпульсу вздовж стрижня. Особливу увагу приділено питанням поширення зондувального імпульсу напружень і зміни температури, яка супроводжує цей імпульс. Встановлено зв’язок між параметрами збуджувального теплового імпульсу і зондувального імпульсу напруження.
Recent advances in the photocatalytic remediation of polycyclic aromatic hydrocarbons
Authors:   Institute of Functional Materials Chemistry, State Scientific Institution “Institute for Single Crystals” of NAS of Ukraine, 60 Nauky ave., Kharkiv, 61072, Ukraine, Shcherbakov I. ,   Institute of Functional Materials Chemistry, State Scientific Institution “Institute for Single Crystals” of NAS of Ukraine, 60 Nauky ave., Kharkiv, 61072, Ukraine, Belikov K. ,   Institute of Functional Materials Chemistry, State Scientific Institution “Institute for Single Crystals” of NAS of Ukraine, 60 Nauky ave., Kharkiv, 61072, Ukraine, Shcherbakova T. ,   Institute of Functional Materials Chemistry, State Scientific Institution “Institute for Single Crystals” of NAS of Ukraine, 60 Nauky ave., Kharkiv, 61072, Ukraine
Published: December 2024

Polycyclic aromatic hydrocarbons (PAHs) are among the most hazardous environmental pollutants due to their high toxicity, carcinogenicity, and ability to accumulate in ecosystems. The development of effective methods for their deactivation is an extremely pressing issue in modern science. One of the most promising methods for efficient PAHs destruction is photocatalytic degradation, which is based on the use of semiconductor materials. Photocatalysis is an environmentally friendly and energy-efficient approach that facilitates the oxidation of PAHs through light irradiation, resulting in the formation of less harmful compounds. This area of research is rapidly advancing, with new materials and approaches emerging each year to enhance the efficiency of photocatalytic degradation of organic pollutants, particularly PAHs. Special attention is given to the development of new photocatalytic materials such as modified oxides of titanium, zinc, iron, and metal- and graphene-based nanocomposites, which offer high activity, stability, and effectiveness in real-world conditions. The review presented in this paper systematizes recent advancements in the field of photocatalytic degradation of PAHs, focusing on key aspects of mechanisms, materials, and future research prospects.
Peculiarities of transformations in systems of coordination nitrate precursors of rare earth elements and lithium during the formation of polyfunctional oxide materials
Authors:   National University “Yuri Kondratyuk Poltava Polytechnic”, 24 Pershotravneva Avenue, 36011, Poltava, Ukraine, Dryuchko O.G. , Soloviev V.V. ,   Poltava V.G. Korolenko National Pedagogical University, 2 Ostrohradskyi Street, 36003, Poltava, Ukraine, Solovieva N.V. ,   Poltava State Medical University, 23 Shevchenko Street, 36011, Poltava, Ukraine, Shefer O.V. ,   National University “Yuri Kondratyuk Poltava Polytechnic”, 24 Pershotravneva Avenue, 36011, Poltava, Ukraine, Bunyakina N.V. ,   National University “Yuri Kondratyuk Poltava Polytechnic”, 24 Pershotravneva Avenue, 36011, Poltava, Ukraine, Moskalenko M.V. ,   National University “Yuri Kondratyuk Poltava Polytechnic”, 24 Pershotravneva Avenue, 36011, Poltava, Ukraine, Yermilova N.V. ,   National University “Yuri Kondratyuk Poltava Polytechnic”, 24 Pershotravneva Avenue, 36011, Poltava, Ukraine
Published: December 2024

The article summarizes information important for practical use on the conditions of formation, composition, structure, forms of Ln coordination polyhedra, type of ligand coordination, and characteristic properties of lithium coordination nitrates of rare earth elements of the cerium subgroup of the isostructural series Li3[Ln2(NO3)9]∙3H2O (Ln – La–Nd) (predecessors of promising modern multifunctional materials). The obtained data (as primary information) can serve as the basis for identifying, monitoring the phase state of processing objects in the preparatory stages; selection of criteria for the compatibility of components in the formation of single-layer and layered nanostructured oxide systems of lanthanides and transition elements with the structure of defective perovskite, garnet in the form of powders, thick films, bulk ceramics; development of various combined methods of their activation and establishment of technologically functional dependencies; controlled modification of the properties of the target product; optimization of synthesis modes of lithium-conducting systems such as electrodes of rechargeable batteries, electrolyte membranes and sensors, elements and instrument structures of modern telecommunications systems.
Effect of thermal spraying of different ceramic coatings on rotational fatigue life of AISI 1020 alloy
Authors:   Department of Physics/ College of Science/ University of Mosul, Rifai Saad Gh. , Khadeer Edrees E. ,   Department of Physics/ College of Science/ University of Mosul
Published: December 2024

The effect of thermal coating of AISI 1020 alloy substrate on the fatigue life during rotation was studied in comparison with the fatigue strength of the substrate. A rotating fatigue tester (HSM 19) was used to test the specimens at room temperature. Fatigue tests were carried out at various stress levels to obtain S-N curves. Two coatings were applied to the AISI 1020 steel alloy using thermal spraying method: a NiAlCrSi bonding coating and a thermal barrier coating based on an alloy (Al2O3+MgO). The microstructure and phase composition of the coatings were investigated using SEM and XRD methods. Compositional analysis revealed the presence of numerous precipitates and primary phases, including Al2O3, Cr2O3, and CrNiO4, nickel or chromium secondary phases, as well as different oxides like CrMgO4. The morphological results also show that the coating was quite heterogeneous, with a significant concentration of oxide inclusions, pores and microcracks. The fatigue strength results show that all coated alloys have reduced strength compared with the uncoated base alloy, which gradually decreases with increasing loads applied to them. It was also discovered that the alloy A4, which contains a high weight fraction of Al2O3, was closest to the base alloy and showed the greatest improvement in fatigue compared to the other alloys.
Effect of annealing temperature on the structural and optical properties of SnO2 thin films elaborated by sol-gel technique
Authors:   Applied Chemistry and Renewable Energy Laboratory, Department of Materials Sciences, University Larbi Tébessi - Tébessa, Constantine Road, Tébessa 12002, Algeria, Khechba M. , Hafdallah A. ,   Applied and Theoretical Physics Laboratory, Department of Materials Sciences, University Larbi Tébessi - Tébessa, Constantine Road, Tébessa 12002, Algeria, Soualhia A. ,   Department of Material Science, Faculty of Natural Sciences and Life, University Larbi Tébessi - Tébessa, Constantine Road, 12002, Tébessa – Algeria, Hanini F. ,   Applied and Theoretical Physics Laboratory, Department of Materials Sciences, University Larbi Tébessi - Tébessa, Constantine Road, Tébessa 12002, Algeria
Published: December 2024

In this study, the influence of annealing temperature on the structural and optical properties of SnO2 thin films was investigated. SnO2 thin films were prepared by sol–gel deposition on glass substrates at room temperature and then annealed at different temperatures (300, 400 and 500°C) in air for two hours. The obtained films were characterized by Raman spectroscopy and UV–Vis spectrophotometry techniques. A single-phase rutile structure was revealed by Raman spectroscopy analysis. The optical measurements have shown that all the films have a high transparency (75-85%) in the visible spectral range, and the optical band gap increases from 3.68 to 3.89 eV with increasing annealing temperature.
Prospects of using MOF/TiO2 nanocomposites for photocatalytic degradation of pesticides
Authors:   State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant protection, Chinese Academy of Agriculture Science, Beijing 100193, China, Zhentao Zhou , Sukhoivanenko A. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv 03056, Ukraine, Dontsova T. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv 03056, Ukraine
Published: December 2024

Cleaning water bodies from fourth-generation pesticides is an urgent problem today. In this study, a series of nanocomposites based on MOF (NH2-MIL-125) and commercial titanium (IV) oxide P25 were synthesized and characterized, and their photocatalytic activity towards imidacloprid was determined. MOF and MOF/TiO2 composites were synthesized by a simple solvothermal method. The synthesized MOF and MOF/TiO2 composite were characterized by XRD, electron microscopy, UV-visible, infrared and FTIR spectroscopy, and TGA analysis. The studies showed that TiO2 and MOF have typical properties, and the properties of the composite were similar to those of MOF. The found band gap values of MOF and MOF/TiO2 composite (2.68 eV and 2.58 eV) indicate their potential use visible light photocatalytic processes. The photocatalytic activity study indicates a two-step degradation of imidacloprid, which is quite efficient for the MOF/TiO2 composite with the highest titanium (IV) oxide content, reaching almost 100% after 2 h our of photocatalytic reaction.
New concept on the transformation of the zone of oil product pollution of the geological environment near of the «Olexandria» Arboretum (Bila Tserkva city, Ukraine)
Authors: Bricks Andriy L. , Havryliuk Ruslan B. , Negoda Iurii O.
Published: December 2024

In Ukraine, numerous geological environment sites are contaminated with lost oil products. Among them, there are many that have a long history of pollution transformation and accumulation. Due to the lack of long-term monitoring, much of the pollution history remains unknown, resulting in inadequate conceptual models that have a negative impact on the design of remediation projects. This article examines a solution to this problem, focusing on studies of the territory of the former Bila Tserkva aircraft repair plant (BARP), bordering the State Arboretum «Olexandria». Since 1990, various organizations have assessed geological contamination and proposed remediation strategies for the factory site and surrounding areas. The article provides information on the main results of the performed research. Emphasis is placed on clarifying the reasons for the sharp difference in the data of hydrogeological investigations conducted in 1990 and 2007. Initially, in 1990, liquid petroleum products (aviation kerosene) were detected only at the site of natural groundwater discharge in the upper reaches of the Western Ravine within the arboretum. On the plant’s territory, where there were undoubtedly sources of pollution and migration pathways of petroleum products in the soil, the presence of pollution was recorded only by the specific smell and color of core samples. However, during prospecting and exploration work in 2007 in the same area, three clearly defined lenses of light non-aqueous phase liquids (LNAPL) were discovered in sub-moraine sands. This phenomenon can be explained by the fact that the surface of groundwater, measured in 1990, dropped from a layer of moraine loams, where the mobility of light oil products is considered negligible, to sub-moraine sands, which are characterized by a much higher permeability.It should be noted that in the western part of the plant’s territory, where aviation fuel storage tanks were located, traces of contamination were found not only in sub-moraine sands and moraine loams, where the groundwater level fluctuates, but also in soils lying on the moraine. This supports the assumption that in the past, there were emergency releases (losses) of a large volume of fuel into the unsaturated soil layer and the subsequent relatively rapid lateral spread of the oil product in the aeration zone.
Tourism as a promising direction of the development of the Komarno urban community in the Lviv Region
Authors: Dnistrianska Nataliia I. , Senkiv Mariana I. , Ilnytska-Hykavchuk Halyna Ya. , Haba Myroslava I. , Makar Oksana. P.
Published: December 2024

The article presents the theoretical foundations for studying the tourism potential of the Komarno urban community. It has been established that this issue has not been sufficiently covered in foreign and domestic literature. The types of preserved objects within the studied community have been identified. The existing objects of historical and cultural heritage of the Komarno community (in particular, archaeological, historical, architectural, natural, and sacred) are characterized as promising for the development of tourism in the community, and a map of their location has been developed. After processing a significant number of sources, as well as conducting field studies, it has been established that the largest number of tourist sites is concentrated in the city of Komarno, but nearby villages also have attractions of interest in the context of tourism development. It was found that in most villages of the community, sacred objects predominate, in particular, churches. Based on the discovered data on attractions, two tourist routes were developed, focused on objects of historical and cultural heritage, and a corresponding map was created. It has been found that the Komarno urban community has a number of advantages for developing its tourism potential: a relatively large number of historical sites and museums, a favorable geographical position, proper environmental conditions, diverse natural tourism resources, preserved sacred sites (in particular, wooden churches), a palace complex, and the presence of cultural heritage sites of national minorities (for example, Polish heritage). However, there are also problems hindering the development of tourism potential: insufficient attention from the authorities to tourism development in the community, the community’s website does not highlight the tourism potential, the proper condition of monuments is maintained mainly by the local population, the poor condition of some sites, non-implementation of tourist routes (despite the fact that some have been developed), insufficient development of infrastructure, and lack of tourist information support. We believe that the rich historical and cultural heritage of the community, effectively popularized and included in the proposed tourist routes, will contribute to a partial solution to these problems, particularly the insufficient development of infrastructure.
Geochemical Characteristics of Felsic Volcanic Rocks in Active Continental Margin above Ridge Subduction: A Case Study of the Neoproterozoic Suxiong Formation in the Western Yangtze Block
Authors: Mabi Awei , Li Yanlong , Yu Niuben , Liu Bo , Lv Feifei , Yang Zhengxi
Published: December 2024

An N-S trending Neoproterozoic magmatic belt is preserved along the western margin of the Yangtze Block, which is characterized by predominant felsic and minor mafic-ultramafic rocks. However, four geodynamic models have been proposed to elucidate the formation of these rocks. In this paper, we present geochronological and geochemical data for dacite crystal tuff, rhyolitic welded tuff, and rhyolite from the Suxiong Formation. These findings, combined with the previously published Sm-Nd isotopic data, aim to provide robust constraints on the genesis of these felsic rocks and offer additional support for the geodynamic model of ridge subduction occurring beneath the western margin of theYangtze Block. Our study reveals that a fresh sample of dacite crystal tuff has a weighted average age of 813 ± 20 Ma. Major elemental data indicate that the samples have predominately peraluminous compositions. In addition, the rhyolites belong to the High-K Calc-alkaline Series and the dacite crystal tuffs are affiliated with the Calc-alkaline Series. They show seagull-shaped chondrite-normalized Rare Earth Elements (REE) patterns with negative Eu anomalies. Multi-element spider diagrams suggest they are enriched in Light Rare Earth Elements (LREE) and Large-Ion Lithophile Elements (LILE) and display Nb-Ta depletion. Additional geological, mineralogical, and geochemical clues suggest these rocks were derived from partial melting of associated Kangding Tonalite-Trondhjemite-Granodiorite (TTG) suites under low-pressure and high-temperature condition. This conclusion is also supported by the Sm-Nd isotopic compositions obtained from previous studies. The rocks have an A-type affinity and belong to A2-type group. On Rb-Hf-Ta triangular plot, they fall in the «volcanic arc» field and are thought to form at an «active continental margin». Moreover, these rocks are comparable in trace-element geochemistry to the rhyolites and dacites of Coast Range in western California, southern Alaska. In conclusion, we proposed that the 813 Ma felsic volcanic rocks of the Suxiong Formation were formed above a slab window driven by ridge subduction. This idea offers additional evidence for supporting a geodynamic model of ridge subduction existing along the western margin of the Yangtze Block during the Neoproterozoic era.
Abandoned quarries of the Middle Dnipro region as promising natural geosites
Authors: Manyuk Volodymyr V. , Ruzina Maryna V.
Published: December 2024

The Middle Dnipro, or Prydniprovia, region, mostly represented by the Seredniodniprovskyi Megablock of the Ukrainian Shield and its connection with the Black Sea basin in the south and with the Dnipro-Donetsk Rift in the east, concentrates important objects of industrial extraction of many important types of mineral resources. A large number of open pits are used for their discovery and extraction, which – once exhausted – remain valuable sources of geological information and, accordingly, are objects of geological heritage. After cessation of mining, quarries can be used in various ways, among which attention is focused on their informational value, i.e. as carriers of geological knowledge regarding stratigraphy, tectonics, petrographic or lithological composition of the rocks, the validity of the age of rock complexes, and the presence of remains of fossil fauna and flora. Moreover, quarries provide an opportunity to collect samples of rocks and minerals for various types of analytical research, including various mineral resources. There is a general tendency to somewhat neglect the enormous amount of geological data that quarries contain, to quickly forget about this aspect of their use, and to give preference to their recreational or touristic value. Upon examining the issue, it was found that there is a lack of detailed scientific descriptions for the vast majority of quarries. Even when such information is present in geological reports, it is often difficult to utilize effectively. We have analyzed a large volume of the literary sources on the use of abandoned quarries in various countries of Europe and around the world, both in from the past and recent reports. First and foremost, the experience of utilizing quarries as valuable geological heritage sites or geosites was considered in order to preserve their informational value. This paper presents the results of the application of various methods in the survey of the quarries, including field methods with the use of its practical components, stratigraphic, paleontological, structural-tectonic, petrological and mineralogical, paleogeographic and others. The total number of abandoned quarries in Dnipropetrovsk Oblast has been fully accounted for, conditionally dividing them into large quarries or simply quarries, stone quarries (which include average-sized and small quarries, but mined for Precambrian crystalline rocks) and mines or clay pits (from which non-metallic mineral resources were extracted). Based on the conducted research, the characteristics of the most informative and important mining products are given for the first time.
Nerón
Authors: Castillo Pepa
Published: December 2024

Este artículo tuvo por objetivo analizar la figura del emperador Nerón en la historiografía flavia y antonina, y explicar por qué estas fuentes han transmitido una imagen tan negativa del último emperador de la dinastía Julio-Claudia. La necesidad de justificar la conspiración que le llevó al suicidio y el que fuese nombrado por el Senado enemigo de la patria podrán explicar en parte esta imagen hostil. Un elemento más para tener en cuenta es que la dinastía que emergió tras la muerte de Nerón, la Flavia, necesitaba construir su propio principio de legitimidad, y para ello inició un proceso de difamación de los predecesores, entre ellos Nerón. Además, la política “reformista” de este y el hecho de que no tuviese ningún hijo varón para sucederlo fueron el panorama perfecto para organizar un exitoso golpe de Estado.
Enquadramentos para a sobralidade
Authors: Braga Teles da Rocha Thiago
Published: December 2024

Neste texto, proponho o estudo de certa forma de historiografia fabricada em Sobral, produzida por cinco sacerdotes ao longo do século XX, os quais enunciam uma cidade modelo, com narrativas permeadas por temáticas, fontes e enquadramentos historiográficos similares ao tornarem homens brancos, católicos e com descendência portuguesa como protagonistas de um passado glorioso de uma cidade onde segundo a óptica dos autores, deveria ter sua relevância nacional reconhecida, fornecendo, assim, cifras para o conceito de sobralidade e justificando o ato de produzir presenças e sentidos de dado passado. Como conclusão, proponho a reflexão sobre historiografia ainda hoje manter influência, sendo relevante para os projetos dos atores políticos ligados à Sobral, problematizando a necessidade de novos passados serem inventados e referenciados para a cidade.
La defensa de la frontera sur de la Monarquía Española en Buenos Aires en el siglo XVIII
Authors: Nahuel Vassallo
Published: December 2024

En este trabajo se realiza un balance sobre la historiografía que ha analizado la frontera sur de la Monarquía Española en Buenos Aires. En particular, el problema de la defensa de los lindes con las sociedades indígenas independientes durante el siglo XVIII, en el marco de estudios que han abordado el periodo con perspectivas seculares y pluriseculares. Para ello, se sigue un proceso cronológico durante el siglo XX, desde los trabajos pioneros en las décadas de 1930 y 1940, hasta los trabajos más recientes. Se identifican los principales problemas e hipótesis, sus continuidades, rupturas y discusiones a lo largo de las décadas, y los distintos enfoques en relación con problemáticas historiográficas más generales.
El Príncipe, de Maquiavelo, en el Italian Thought
Authors: Scotton Paolo
Published: December 2024

A partir del caso de estudio emblemático constituido por el debate sobre el legado de El Príncipe, de Maquiavelo, en el llamado Italian Thought, en particular en dos de sus destacados autores, Roberto Esposito y Antonio Negri, este artículo analiza la manera en la que las corrientes filosóficas se definen a sí mismas a través de discursos aparentemente neutrales que se producen en comunidades bien definidas. Se hace evidente que la comprensión crítica de la historiografía y del análisis filosófico permite leer e interpretar el espíritu de una época y de una nación. Así, este artículo demuestra el valor de esta comprensión crítica, probado por el hecho de que gracias a ella será posible definir las características principales de la filosofía política italiana actual.
Semiotic Analysis of Education Oriented Poster Designs
Authors: Ustaoğlu Görkem
Published: December 2024

Posters have been created by combining drawing, color, photography and typography elements, and today they have become a communication tool that has gained both aesthetic and functional qualities. The aim of poster designs is to raise awareness about societal issues. This communication tool reflects the characteristics of the target audience with its messages in line with certain principles, while also creating a functional form according to its subject. There are different methods to analyze poster designs, and semiotics is one of these methods. Semiotics systematically interprets and reveals sub-texts by analyzing and interpreting signs underlying images. Within the scope of the study; semiotics was handled under certain headings and analyses were made on educational posters of international and national artists and Ferdinand de Saussure 's method was used. The examples selected for analysis consist of four posters from a juried design competition held in 2011 under the theme of “Right to Education” addressing the topic of education from various perspectives. In line with the analyses, it has been determined that the semiotic analysis method can provide clearer data. In addition to this, the importance of using this analyses has been revealed with the method used in the research.