Above-mentioned Structures Research Articles

Topological Characterization for Triangular, RegularTriangular Oxides and Silicates Networks

Chemical graph theory can be studied with the aid of mathematical tools called m-polynomials. M-Polynomials offer a potent tool for computing different topological indices associated with vertex degrees and analyzing degree-based structural information in graphs. By counting specific substructure types within them, they are able to encode information about the structure of molecules or networks. In this article, we have developed M-Polynomials with the help of different topological invariants such as first Zagreb (M1(β)), second Zagreb (M2(β)), second modified Zagreb (Mm2(β)), inverse sum (I(β)), harmonic index (H(β)) and Randic index (Rα0(β)) for the molecular structures of Triangular oxide TOX(r), Regular triangular oxide RTOX(r), Triangularsilicate TSL(r) & Regular triangular silicate RTSL(r) networks to introduce new closed formulas to get better understanding the applications of M-Polynomials and topological indices in mathematical chemistry especially in the field of QSAR and QSPR study with the help of some software like MATLAB. We have also discussed the graphical behaviors of the above-mentioned structures.

The Endoscopic Transorbital Approach for Vascular Surgery: An Anterior Circulation Anatomic Study, 2-Dimensional Operative Video.

Minimally invasive endoscopic approaches in cranial base surgery have been developing in the past decades. The transorbital (TO) route is one promising alternative, yet its adequacy for intracranial vascular lesions remains unclear. The present anatomic work aimed to test the feasibility and to provide a qualitative description of the endoscopic TO approach for the anterior circulation, namely the internal carotid artery and the middle cerebral artery. Seven embalmed adult cadaveric specimens (12 sides) were used in the study. Each side was approached in 3 successive steps: (1) Superior-eyelid TO approach, with great and lesser sphenoid wing removal. (2) Removal of anterior clinoid process (ACP). (3) Removal of the lateral orbital rim. All the procedures were performed under endoscopic view. The TO approach without removing the ACP allowed to dissect the sphenoidal and lateral segments of the Sylvian fissure with an adequate identification of the middle cerebral artery bifurcation in all specimens. The removal of the ACP allowed further dissection toward the opticocarotid cistern, with the identification of the ophthalmic, posterior communicating, and the anterior choroidal arteries. The internal carotid artery bifurcation and A1 segment were also readily identified. Finally, removal of the lateral orbital rim provided a wider and more comfortable access to the above-mentioned vascular structures. According to our anatomic data, the TO approach can be used to reach the main vascular components of the anterior circulation. This opens the field for exploring its application in the treatment of vascular pathology, particularly aneurysms.

Humidity regime of building envelope structures of the drying compartment tula brewery

The article presents the results of a study of the humidity regime of building enclosing structures of the drying department of the brewery located in Tula. The assessment of the humidity regime was carried out in order to identify the causes of damage to external, internal walls and attic floors, and the task was also set to develop technical solutions for steam and waterproofing of the above-mentioned enclosing structures. To solve the tasks set, thermophysical calculations of building enclosing structures were performed, as well as an assessment of their moisture accumulation during the operation of the building. The position of the plane of possible condensation was determined using the author’s methodology. The results of thermophysical calculations showed the presence of moisture accumulation in the above-mentioned structures, which is associated with the use of PVC polyethylene film as wind protection. It was also revealed that there was a discrepancy with the regulatory requirements for thermal protection of the external wall of the electrical panel. In order to eliminate these problems, recommendations were made, which consisted in using an Isospan A type film as a vapor barrier, increasing the thickness of the insulation, organizing natural supply and exhaust ventilation of the attic room, as well as waterproofing the structures of the outer wall made of monolithic reinforced concrete.

Advances in suppression of structural vibration and sound radiation by flexural wave manipulation

The newly generated artificial structures, including phononic crystals, elastic metamaterials, acoustic black holes (ABHs) and elastic metasurfaces, can abnormally control wave propagations. In this paper, focusing on plate structures and from the perspective of the suppression of vibration and especially sound radiation by manipulating flexural waves, we give a thorough review of the advances of above-mentioned artificial structures, involving their extraordinary characteristics, corresponding mechanisms of vibration and sound radiation suppression, design methods of phase-gradient elastic metasurfaces, and some representative works on suppressing vibration and sound radiation of plates by flexural wave manipulations. Additionally, we compare the advantages and disadvantages of these artificial structures in vibration and sound radiation suppression. Finally, we look forward to the prospects on vibration and sound radiation suppression of plates based on wave manipulations. This paper will provide a timely and practical assistance to academic and technical researchers in the field of vibration and noise reduction.

Anatomy of Maxillary Sinus: Focus on Vascularization and Underwood Septa via 3D Imaging.

The study of the maxillary sinus anatomy should consider the presence of two features of clinical importance. The arterial supply course and the presence of the so-called Underwood septa are two important factors to consider when planning surgical treatment to reduce the risk of surgical complications such as excessive bleeding and Schneiderian membrane perforations. This study aimed to investigate the above-mentioned anatomical structures to improve the management of eventual vascular and surgical complications in this area. This study included a total of 200 cone-beam computed topographies (CBCTs) divided into two groups of 100 CBCTs to evaluate the arterial supply (AAa) course through the lateral sinus wall and Underwood's septa, respectively. The main parameters considered on 3D imaging were the presence of the AAa in the antral wall, the length of the arterial pathway, the height of the maxillary bone crest, the branch sizes of the artery in the first group, and the position of the septa, the length of the septa, and their gender associations in the second group. The CBCT analysis showed the presence of the arterial supply through the bone wall in 100% of the examined patients, with an average size of 1.07 mm. With regard to the septa, 19% of patients presented variations, and no gender difference was found to be statistically significant. The findings add to the current understanding of the clinical structure of the maxillary sinus, equipping medical professionals with vital details for surgical preparation and prevention of possible complications.

Międzynarodowy wymiar polskiego ratownictwa

International dimension of Polish rescue The article presents international security structures within the framework of which it is possible to dispose of Polish rescue resources outside Poland. The authors focused mainly on three major international organizations, where appropriate structures, mechanisms or groups have been created for this purpose, i.e. – the European Union (EU), the United Nations (UN), the North Atlantic Treaty Organization (NATO). These organizations also have their own coordination centers operating on a 24-hour basis, which makes these activities coordinated and supervised. This article also presents the legal basis on which the above-mentioned structures are established. In addition, examples are presented of rescue fields in the area of which the created rescue entities function according to specific schemes, determined by international conventions, guidelines, etc., referring here mainly to marine and air rescue.

The role of managerial competencies in fostering collaboration between higher education institutions and local communities

Relevance. The relevance of the scientific work lies in the need to study the competencies of the heads of higher education institutions and territorial communities in Ukraine and the results of their relationships. Purpose. The purpose of this research work is to identify the key competencies of senior officials of higher education institutions of Ukraine in 2023 and the results of their influence on the development of cooperation between higher education institutions and territorial communities. Methodology. Theoretical and empirical research methods were used in the scientific work, namely description, analysis, systematization, generalization, the survey of employees of the structure of education and territorial community in the city of Poltava, as well as interviews. Results. As a result of the scientific research, the necessary competencies of the manager were identified, which are a prerequisite for effective management of higher education institutions and territorial communities in Ukraine by the beginning of 2023. Also, the main characteristics of the leader’s personality and their influence on the establishment of interaction between territorial communities and institutions of higher education were determined in the research work. The main competencies of managers and necessary personal qualities are structured in this work. Conclusions. The position of employees of the Taras Shevchenko Luhansk National University and members of the Poltava City Council, as representatives of the territorial community of the city of Poltava, was studied, with the help of a survey, regarding the presence of the necessary managerial competencies and personal qualities of the managers of the above-mentioned structures and their influence on the interaction between the structures. The results of research work can be used by scientists and researchers for further study of the main competencies of heads of higher education institutions and territorial communities in Ukraine.

ԿՐԿՆԱԲԱՂԱԴՐՅԱԼ ԺԱՄԱՆԱԿԱՁԵՎԵՐԻ ԱՐՏԱՀԱՅՏՈՒԹՅՈՒՆԸ 12-16-ՐԴ ԴԱՐԵՐԻ ՀԱՅԵՐԵՆ ՎԻՄԱԿԱՆ ԱՐՁԱՆԱԳՐՈՒԹՅՈՒՆՆԵՐՈՒՄ /

Due to the later publication of a number of Middle Armenian lithographic inscriptions, some of the linguistic facts recorded in them have not been linguistically studied. The latter also includes two-component tenses that are included in the conjugation system and are eager to be considered, this proves the relevance of the topic we are studying. The purpose of this work is to consider the double tenses recorded in Armenian inscriptions of the 12th-16th centuries, and to highlight the features of the plans of their expression and content. To achieve this goal, the following problems were solved: o the necessary linguistic facts from ten volumes of the ”Divan of Armenian Lithography” were obtained; o the conclusions on the issue were drawn. The study was mainly conducted using descriptive, analytical and statistical methods. In the Armenian epigraphic inscriptions of 12th-16th centuries, both Middle Armenian and Old Armenian double-complex tenses were used, which were especially evidenced in inscriptions of a donative, constructive nature, containing a curse or a blessing. The linguistic realities reflected in the inscriptions prove that the recorders or the orderers of the inscriptions tended to use mainly Old Armenian double-complex forms. It is no coincidence that the main mean of expression of the above-mentioned structures is the Old Armenian "past participle + subordinate 2nd future" partial patterns. In rare cases there are also structures of the Middle Armenian "participle 2 + subordinate 2nd future" and " perfect participle + subordinate 2nd future" partial patterns.

Economic Resilience in the Centre Development Region, Romania. A Methodological Approach to the 2009–2011 Economic Crisis and Post-crisis

Economic resilience consists of the decisions taken by firms in order to face decreasing demand (during an economic crisis) while maintaining a functional economic structure so that they may then return to business as usual after the crisis has passed. In addition, it refers to how the population acts in order to stay in the labour market and maintain their standard of living. The educational structure must fit the needs of firms. This study relies on three datasets at the NUTS V level for the Central Development Region in Romania for the demographic, labour market and educational structure: the situation in 2008, the evolution of the three structures during the crisis period (2009–2011), and the evolution of the above-mentioned structures during the 2012–2019 post-crisis period. The migration of people with a domicile from urban areas to rural areas was associated with a decrease in the number of employees and the unemployed in urban areas (big and medium-sized cities) simultaneously with an increase in the unemployed population in rural areas. The unemployed moved their domiciles from urban areas to peri-urban areas, commuting to the cities. There were people who moved their residence from small cities to big and medium-sized ones. The post-crisis economic recovery was quick and the economic structure remained functional during the crisis.

Tolerances calculation for construction works and geodetic control during erection of reinforced concrete foundation columns for steel structures of thermal and gas-material pipeline overpasses

The purpose of the publication is to analyze the methods of calculations of accuracy of construction works and geodetic control of erection of reinforced concrete foundation columns for overpass steel structures of thermal and gas-material pipelines of oil refineries. For this purpose, a calculation methodology is considered, which takes into account operational technologies, including construction works and geodetic control, during the erection of the above-mentioned structures. The obtained results show that in order to ensure the standardized limit deviations of construction works, interrelated reasonable accuracy standards in the erection of structures are required, taking into account the average weighted average errors of geodetic control. In regulatory documents for the erection of structures are given accuracy standards (limit deviations) on their final position, and on geodetic control are given without taking into account the technological processes accuracy indicators of construction works. Setting the liability indicator of structures by purpose, we are establishing a confidence probability of ensuring the construction accuracy of the structure. To analyze the construction works and geodetic control accuracy we used the following methods: equal and negligible influence of deviation on the final position of structures and the method taking into account the accuracy of construction’s technological processes. In this publication examples of error calculations using the above mentioned methods are given. It is established that the most justified tolerances for structures erection are obtained when the method is applied taking into account the accuracy of their construction technological processes (by the accuracy indicator of technological process of construction works the limiting errors of geodetic control are established).

Influence of the Long-Term Loading on the Strength and Rigidity of the Annular Section Poles

Introduction. The modern methods of analysis and conducting the numerical experiments referring to calculation and design of constructions are mostly aimed at a deeper study of parameter changes of different structures exposed to the influence of the certain loads. Due to the course of time and upon obtaining and analysing the new results of the numerical studies, there arises the need to revise and update the normative documents developed in the past in the frame of studying the certain modes of structures’ operation. Bearing in mind the above-mentioned objective, the numerical study presented in this article has been carried out.Materials and Methods. It should be mentioned, that most of the previously conducted research was based on the results of the short-term exposure of the structures to the loads, but not enough attention was paid to the study of the influence of the long-term loading on the structures' operation. This paper presents the results of the numerical experiments investigating the load-bearing capacity, flexural rigidity and maximum force of the power transmission line poles exposed to the short-term and long-term loads. The specimen under study is the cylindrical power transmission line pole complying with the GOST 22687.2 “Centrifugal cylinder reinforced concrete posts for high-voltage transmission lines”.Results. The paper presents the results of studying the behaviour of the cylindrical reinforced concrete poles, serving as the supports for the electrical power transmission lines, under the short-term and long-term loading. The work provides the results of numerical experiments investigating the strength and rigidity parameters of the above-mentioned structures under different types of loading, as well as upon changing the eccentricities of the application of these loads. The assessment of the rigidity parameters change under the long-term exposure of the poles to the loads is carried out.Discussion and Conclusion. Based on the results, obtained during the numerical experiments, the strength and rigidity parameters of the annular section power transmission line poles were analysed, and proposals for improving the design codes were made that could become a basis for the further research on this issue.

Study on de-icing criterion of anti-icing coating and simulation analysis method of mechanical de-icing process for polar ship superstructure

The considerable amount of ice accumulation on the surface of polar ship superstructure has seriously threatened the navigation safety of the Polar ships. Anti-icing coating has become one of the most effective anti-icing methods for polar ships. When the coating surface is covered with ice for a long time, mechanical de-icing measures should be taken for the icing on the coating surface. In this study, the static icing adhesion shear strength and normal peeling strength of the anti-icing coating were examined, introduction of temperature parameters into existing de-icing criterion, so as to simulate the energy required for mechanical de-icing and the efficiency of de-icing without damaging the anti-icing coating. The simulation analysis of mechanical de-icing and coating peeling of typical hull structures (e.g., flat plate structure, curved parapet structure, curved structure with 70 mm radius and 120 mm radius) was completed in accordance with the criterion. Moreover, the range of energy required for mechanical de-icing and the de-icing efficiency of the above-mentioned typical structures were derived. The de-icing criterion and peeling strength criterion of anti-icing coating and the numerical simulation method proposed in this study can lay a solid technical basis for the design and performance evaluation of polar ship anti-icing systems in the future.

Phase stability diagram, self-similar structures, and multistability in a free-running VCSEL with a small misalignment between the phase and amplitude anisotropies.

We report on the global dynamics of a free-running vertical-cavity surface-emitting laser (VCSEL) with misalignment between the linear phase and amplitude anisotropies due to the fact that this case might occur in practice caused unintentionally by minor manufacturing variations or design, in virtue of high-resolution phase stability diagrams, where two kinds of self-similar structures are revealed. Of interest is that the Arnold tongue cascades covered by multiple distinct periodicities are discovered for the first time in several scenarios specified in the free-running VCSEL, to the best of our knowledge. Additionally, we also uncover the existence of multistability through the basin of the attraction, as well as the eyes of anti-chaos and periodicity characterized by fractal. The findings may shed new light on interesting polarization dynamics of VCSELs, and also open the possibility to detect the above-mentioned structures experimentally and develop some potential applications.

Impact of radiation dose on patient-reported acute taste alteration in a prospective observational study cohort in head and neck squamous cell cancer (HNSCC)

PurposeTaste alteration (TA) is a frequent acute side effect of radiation treatment in HNSCC patients. Principal aim of our study was to investigate dosimetric parameters in relation to patient-assessed taste impairment in a prospective cohort treated with intensity-modulated radiotherapy.MethodsAll patients with locally advanced HNSCC and amenable to radical treatment were included. Chemotherapy-induced taste alteration scale (CITAS), EORTC QLQ-C30 and QLQ-HN43 questionnaires at baseline (T0), 3 weeks (T1) and 3 months (T2) after radiotherapy conclusion were used to assess taste impairment. Base of tongue, submandibular glands (SG), parotid glands (PG) and taste buds, along with anterior and medium third of the tongue, were considered as organs at risk and thus delineated according to consensus guidelines. The mean dose to the above-mentioned structures was correlated with patient-reported outcomes.ResultsBetween September 2019 and November 2020, 33 patients were recruited, 31 of which analyzed. 71% had oropharyngeal carcinoma, mostly HPV-related (60%). All were treated with tomotherapy. 77.4% had concurrent cisplatin. Mean scores of general taste alterations, global health status and dry mouth and sticky saliva were assessed. The mean doses to the anterior third, medium third and base of the tongue were 23.85, 35.50 and 47.67 Gy, respectively. Taste buds received 32.72 Gy; right and left parotid 25 and 23 Gy; right and left submandibular glands 47.8 and 39.4 Gy. At univariate analysis, dysgeusia correlated with SG mean dose (95% CI 0–0.02 p = 0.05) and PG mean dose (95% CI 0–0.02 p = 0.05); dry mouth with mean dose to anterior (95% CI 0.03–1.47 p = 0.04) and medium third (95% CI 0.02–0.93 p = 0.04) of the tongue, to taste buds (95% CI 0.06–0.96 p = 0.03) and to SGs (95% CI 0.06–0.63 p = 0.02); pain mouth with mean dose to taste buds (95% CI 0–0.02 p = 0.04), to SGs (95% CI 0–0.03 p = 0.03) and to base tongue (95% CI 0–0.02 p = 0.02).ConclusionsOur analysis supports the influence of dose distribution on the development of TA in HNSCC patients. The contribution of dose to taste buds and tongue subvolumes remains unclear and worthy of further investigation.

Methodological Basis of Surgical Reconstruction of the Trachea in Its Long-term Stenosis

The aim of the study is to improve the results of treatment of cicatricial stenosis of the trachea. The stages of performing a circular resection of the trachea, which increases the effectiveness of restoring the lumen of the trachea in case of its cicatricial obstruction, are described. This technique was tested on 15 patients. All this made it easier to complete the task at the optimal time of treatment. Material and methods. In the Otolaryngology Department of the National Hospital under the Ministry of Health of the Kyrgyz Republic, under our supervision, there were 15 patients with a cicatricial process or tracheomalacia with a length of more than 5 semicircles. In 6 patients, the length of destruction of its lumen acceptable for reconstruction of the trachea was lengthened by a cannula tracheostomy located at the lower edge, and in 9 patients, cicatricial deformity of the lumen of the trachea or tracheomalacia was localized in the cervical region and in other above-mentioned anatomical structures of the respiratory tract. In all these observations, an original approach to the task was needed, which would solve the problem of eliminating the obstruction of the lumen of the trachea either at the first surgical intervention, or, by performing a successful complete or partial reconstruction of the cervical trachea, would facilitate the restoration of its lumen in the thoracic region or in the larynx. Conclusion. It follows from the materials presented that the method of performing the described variant of reconstructive surgery, which differs not only in the lower, but also in the upper mobilization of the respiratory tract, as well as an economical attitude even to the part of the trachea injured by the cannula tracheostomy, while maintaining the elasticity and rigidity of its remaining walls, deserves attention and, of course, can be recommended for implementation in practice.

Focused view CT angiography for selective visualization of stroke related arteries: technical feasibility

ObjectivesThis study investigated the technical feasibility of focused view CTA for the selective visualization of stroke related arteries.MethodsA total of 141 CTA examinations for acute ischemic stroke evaluation were divided into a set of 100 cases to train a deep learning algorithm (dubbed “focused view CTA”) that selectively extracts brain (including intracranial arteries) and extracranial arteries, and a test set of 41 cases. The visibility of anatomic structures at focused view and unmodified CTA was assessed using the following scoring system: 5 = completely visible, diagnostically sufficient; 4 = nearly completely visible, diagnostically sufficient; 3 = incompletely visible, barely diagnostically sufficient; 2 = hardly visible, diagnostically insufficient; 1 = not visible, diagnostically insufficient.ResultsAt focused view CTA, median scores for the aortic arch, subclavian arteries, common carotid arteries, C1, C6, and C7 segments of the internal carotid arteries, V4 segment of the vertebral arteries, basilar artery, cerebellum including cerebellar arteries, cerebrum including cerebral arteries, and dural venous sinuses, were all 4. Median scores for the C2 to C5 segments of the internal carotid arteries, and V1 to V3 segments of the vertebral arteries ranged between 3 and 2. At unmodified CTA, median score for all above-mentioned anatomic structures was 5, which was significantly higher (p < 0.0001) than that at focused view CTA.ConclusionFocused view CTA shows promise for the selective visualization of stroke-related arteries. Further improvements should focus on more accurately visualizing the smaller and tortuous internal carotid and vertebral artery segments close to bone.Clinical relevanceFocused view CTA may speed up image interpretation time for LVO detection and may potentially be used as a tool to study the clinical relevance of incidental findings in future prospective long-term follow-up studies.Key Points• A deep learning–based algorithm (“focused view CTA”) was developed to selectively visualize relevant structures for acute ischemic stroke evaluation at CTA.• The elimination of unrequested anatomic background information was complete in all cases.• Focused view CTA may be used to study the clinical relevance of incidental findings.

Anatomical, Histological and Histochemical Observations of the Eyelids and Orbital Glands in the Lowland Tapir (Tapirus terrestris Linnaeus, 1785) (Perissodactyla: Ceratomorpha).

The lowland tapir is one of four species belonging to the Tapiridae family of the Ceratomorpha suborder, similar to Rhinocerotidae. This study describes anatomy with morphometry, histology (hematoxylin and eosin, Masson-Goldner trichrome, Movat pentachrome, mucicarmine, picro-Mallory trichrome) and histochemistry (PAS, AB pH 1.0, AB pH 2.5; AB pH2.5/PAS and HDI) of the upper and lower eyelids, and superficial gland of the third eyelid with the third eyelid, deep gland of the third eyelid, and lacrimal gland. The aim of the work is to show the features of the above-mentioned structures typical only for Tapiridae, as well as to show the presence of similarities and differences between the families forming the order Perissodactyla. The eyelashes on the upper eyelid were long, while those of the lower eyelid were short and much less prominent. In the upper and lower eyelid sebaceous glands, a characteristic simple alveolar gland producing a mucus-like secretion and poorly developed tarsal glands were observed. The marginal zone of the posterior surface of the eyelids was covered by stratified columnar epithelium with 18-21 layers of nucleated cells, while the bulbar zone of these surfaces was covered by cubic multilayer epithelium with 6-11 non-keratinized layers of cells and with sparse goblet cells. In only lower eyelids, numerous lymphoid nodules, diffuse lymphocytes and high endothelial venules were observed. The superficial gland was an acinar complex which secreted mucous and contained plasma cells within the interlobular and interlobular connective tissue. The upper and lower branches of the third eyelid were the shape of a bent "caudal fin" and were composed of hyaline cartilage, and they contained conjunctiva associated lymphoid tissue (CALT). The deep gland was also an acinar complex producing a serous character and having numerous diffuse lymphocytes. The lacrimal gland was an acinar complex producing seromucous secretions and had numerous plasma cells located in the glandular interstitium. The results of our research indicate that the features of the anatomy of the eyelids and orbital region in the lowland tapir are also typical of the family Tapiridae, but also have features common to the families Equidae and Rhinocerotidae. We confirm the presence of poorly developed tarsal glands in both eyelids as well as presence of a palpebral part of the lacrimal gland in the upper eyelid, which is typical only to Tapirus terrestris.

On the problems and prospects of interaction of subjects of public control with tax authorities

This article is devoted to the analysis of modern problems and prospects of interaction of subjects of public control with tax authorities in the Russian Federation. The paper substantiates the importance of such interaction both in order to develop the institution of public control and in terms of optimizing the work of tax authorities in Russia. The author classifies the forms of interaction of subjects of public control with tax authorities in the Russian Federation, highlighting their interaction: a) as a subject and object of public control; b) as a body of state control (supervision) and a subject of public control, sending final documents prepared based on the results of public control measures against third parties; c) as a subject of public control and a public authority called upon to respond in connection with the provision of information on a tax offense identified during the implementation of public control. A number of scientific research methods are used in the work, in particular: formal-logical; historical-legal; comparative-legal; statistical; sociological; method of analyzing specific legal situations. The article not only analyzes modern problems related to the organization and implementation of interaction between subjects of public control and tax authorities in the country, but also develops and justifies a system of measures aimed at solving these problems in order to provide new areas of interaction and cooperation of the above-mentioned structures. The object of this study, therefore, consists of public relations related to the organization and implementation of the activities of subjects of public control in the Russian Federation, the subject of the study is represented, on the one hand, by legal norms regulating the mechanism of interaction between subjects of public control and tax authorities in Russia, materials of judicial practice, and on the other hand, scientific legal doctrinal sources in the field of public control.

Electronic and work function-based glucose sensors on graphene, silicene, and germanene sheets – DFT studies

Diabetes is a chronic health condition caused due to a metabolic disorder that results in high blood sugar levels. Diabetes would be the seventh-prominent reason for mortality according to recent studies. There is a need for the improvement of selective and sensitive glucose detection in medicine, clinical diagnostics, and the food industry. We have studied a density functional theory (DFT) method of the adsorption of glucose on pure graphene, silicene, and germanene sheets. For the above-mentioned structures the optimized geometries adsorption energies have been calculated to analyze the suitability and efficiency for glucose sensing. The electronic properties such as charge transfer analysis, band gap, fermi energy, work function, and density of states have been studied into attention. Our result reveals that the interaction between glucose with pristine graphene sheet is strong chemisorption when compared to the case of pristine silicene and pure germanene which exhibits weak chemisorption suitable for sensors. However pristine germanene shows high bandgap variation when compared to silicene indicating that it can act as an electronic sensor. Tomodify the adsorption properties by improving its chemical reactivity and electronic structure, we suggest either doping with different atoms, preparing sheets with defects or chemical functionalization have to be applied.

Phase zonation of distribution of hydrocarbons in the southern part of the Timan-Pechora oil and gas province according to the principle of differential entrapment

The article reviewed the phase zonation of the distribution of hydrocarbons in natural reservoirs in the southern part of the Timan-Pechora plate (Verkhnepechorskaya and Izhma-Pechora depressions) and the Timan ridge (Ukhta-Izhemsky wall) from the standpoint of the Maximov-Savchenko-Gassou principle of differential hydrocarbon entrapment. Undoubtedly, the formation of oil and gas deposits is a very complex process and at the same time the principle of differential entrapment is a special case in nature. However, the distribution of hydrocarbons accumulations of various phase states formed according to the principle of differential entrapment is quite often observed in the trap chain, so that the spacing of oil and gas accumulations fits well into this concept and works for the above-mentioned structures. Keywords: migration and accumulation of hydrocarbons; principle of differential entrapment of hydrocarbons; phase zonation; oil density.