520 results match your criteria: "V.N. Karazin Kharkiv National University[Affiliation]"
Planar resonators have a wide usage in modern microwave technologies and perspectives in novel quantum technologies development. As was demonstrated earlier, their utilization allows to achieve high values of microwave photon-magnon coupling strength-an important parameter in technologies of information coherent transfer from electromagnetic GHz range to the optical range. In the present work, the achievement of the high value of the microwave photon-magnon coupling strength by exploiting the increase of the spatial concentration of the magnetic component of the planar resonator electromagnetic field is reported.
View Article and Find Full Text PDFJ Clin Exp Hepatol
October 2022
Biology Research Institute V. N. Karazin Kharkiv National University, 4 Pl. Svobody, 61022 Kharkiv, Ukraine.
Background: Liver diseases remain the most important medical and biological problem. Works devoted to the study of the vitamin A role have shown conflicting results of its effect on the fibrosis development. We tested the hypothesis that an increase of the copper content in the liver, an example of which is Wilson's disease, shifts the balance in the redox system towards pro-oxidants, which leads to the antioxidant systems inhibition, including a decrease in the vitamin A content; this affects the levels of liver function regulation and the development of fibrosis.
View Article and Find Full Text PDFCureus
December 2022
Faculty of Medicine, University of London, London, GBR.
High-fat diets have been identified as a major cause of obesity and a potential risk factor for breast cancer. Fat tissue, also known as adipose tissue, produces an excess of estrogen, which has been linked to an increased risk of breast cancer. Determining the impact of HFDs in the development and progression of breast cancer is essential, as it will enable us to identify the role of dietary modification in preventing and managing the disease.
View Article and Find Full Text PDFACS Omega
December 2022
School of Physics and Technology, V.N. Karazin Kharkiv National University, Kharkiv61022, Ukraine.
In the present research, experiments on the formation and retention of nanoparticles (NPs) in the plasma of radio frequency (RF) capacitive discharge in acetylene were carried out with vertically positioned internal electrodes. It has been shown via SEM and TEM techniques that NPs found on the horizontal tube wall after the discharge operation have a spherical shape with a predominant diameter of approximately 400-600 nm. HRTEM analysis reveals their amorphous structure.
View Article and Find Full Text PDFBackground: Along with the presence of the 2011 and numerous large-scale studies on the treatment of hyperprolactinemia of different origin, there are some unresolved questions, ambiguous and sometimes contradictory points of view regarding the management of patients with prolactinomas. This overview is devoted to the analysis of the results of modern clinical studies and the approaches towards the management of hyperprolactinemia caused by prolactinoma.
Materials And Methods: A systematic research of the literature for the appropriate keywords published mainly for the last 10 years was done; also, a reference list of each selected article was analysed.
Int J Gynecol Cancer
October 2022
,Department of Preventive Medicine and Public Health, Universidad de Navarra, Pamplona, Spain.
Objective: To evaluate whether compliance with European Society of Gynaecological Oncology (ESGO) surgery quality indicators impacts disease-free survival in patients undergoing radical hysterectomy for cervical cancer.
Methods: In this retrospective cohort study, 15 ESGO quality indicators were assessed in the SUCCOR database (patients who underwent radical hysterectomy for International Federation of Gynecology and Obstetrics (FIGO) stage 2009 IB1, FIGO 2018 IB1, and IB2 cervical cancer between January 2013 and December 2014), and the final score ranged between 0 and 16 points. Centers with more than 13 points were classified as high-quality indicator compliance centers.
Cureus
November 2022
Internal Medicine, Sir Syed College of Medical Sciences for Girls, Waterbury, USA.
The current meta-analysis aims to assess the efficacy and safety of sodium glucose cotransporter 2 (SGLT2) inhibitors in individuals with diabetes and chronic kidney disease (CKD). The current meta-analysis was conducted using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A systematic search was conducted to identify all relevant studies related to the efficacy and safety of SGLT2 inhibitors in individuals with diabetes and CKD.
View Article and Find Full Text PDFQual Theory Dyn Syst
December 2022
V.N.Karazin Kharkiv National University, Kharkiv, 61022 Ukraine.
We study a virus dynamics model with reaction-diffusion, logistic growth terms and a general non-linear infection rate functional response. The model has a distributed delay, including the case of state-selective delay. We construct a dynamical system in a Hilbert space and prove the existence of a finite-dimensional global attractor.
View Article and Find Full Text PDFCureus
October 2022
Orthopaedic Surgery, Lahore General Hospital, Lahore , PAK.
Post-traumatic unilateral carotid cavernous fistula (CCF) with ipsilateral symptoms is a rare occurrence, so its diagnosis frequently gets overlooked for other more common conditions. Timely imaging with digital subtraction angiography (DSA) and appropriate vascular intervention is essential in preventing potentially serious sequelae in such cases. We describe a case of post-traumatic CCF in a 42-year-old man who experienced intermittent headaches and right eye redness, proptosis, and watery discharge for three months following the incident.
View Article and Find Full Text PDFGeorgian Med News
September 2022
V.N. Karazin Kharkiv National University, Ukraine.
The article is devoted to the features of the clinical picture of hyperprolactinemia, which can be partially determined by both gender and age of patients. Along with the well-known "classic" manifestations of hyperprolactinemiс syndrome, such as clinical signs of hypogonadism and mechanical pressure of the pituitary tumor on adjacent anatomical structures, there are others that are poorly known to a wide range of practicing physicians. Less frequent manifestations of hyperprolactinemia include the development of hypopituitarism, osteoporosis or osteopenia, alopecia.
View Article and Find Full Text PDFProc Biol Sci
September 2022
Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA.
Traits for prey acquisition form the phenotypic interface of predator-prey interactions. In venomous predators, morphological variation in venom delivery apparatus like fangs and stingers may be optimized for dispatching prey. Here, we determine how a single dimension of venom injection systems evolves in response to variation in the size, climatic conditions and dietary ecology of viperid snakes.
View Article and Find Full Text PDFEur J Med Chem
December 2022
Department of Medicinal Chemistry, National University of Pharmacy, 53 Pushkinska str., 61002, Kharkiv, Ukraine. Electronic address:
In order to search for innovative nootropic agents, new 1-benzyl-4- (4- (R)-5-sulfonylidene-4,5-dihydro-1H-1,2,4-triazol-3-yl) pyrrolidine-2-ones was synthesized by reacting benzylamine with itaconic acid to 1-benzyl-5-oxopyrrolidine-3-carboxylic acid, which was then subjected to hydrazinolysis followed by the addition of substituted isothiacyanate followed by cyclization of intermediate thiosemicarbazides. The structure and purity of the obtained substances were confirmed by elemental analysis, H NMR spectroscopy, C NMR spectroscopy and LC/MS. Docking studies were performed for the substances synthesized using Autodock 4.
View Article and Find Full Text PDFJ Phys Chem Lett
November 2022
Department of Chemistry, University of Southern California, Los Angeles, California90089, United States.
Carbon nanotubes are among the most widely used nanosystems, and stability of carbon nanotube suspensions is critical for nanotechnology and environmental science. Remaining in aqueous environment alone misses important factors that regulate colloidal stability in the presence of electrolytes. Indeed, introduction of (80-95) vol % organic solvents leads to sharp changes in suspension properties depending on the solvent.
View Article and Find Full Text PDFSci Rep
October 2022
Materials Chemistry Department, V. N. Karazin Kharkiv National University, Kharkiv, 61022, Ukraine.
The energy landscape with a number of close minima separated by low barriers is a well-known issue in computational heterogeneous catalysis. In the framework of the emerging out-of-equilibrium material science, the navigation through such involved landscapes is associated with the functionality of materials. Current advancements in the cluster catalysis has brought and continues to bring essential nuances to the topic.
View Article and Find Full Text PDFJ Phys Chem B
October 2022
Physical Chemistry Department, V. N. Karazin Kharkiv National University, Svoboda Square 4, Kharkiv, 61022, Ukraine.
MS2 bacteriophage is often used as a model for evaluating pathogenic viruses' behavior in aqueous solution. However, the questions of the virus surface's hydrophilic/hydrophobic balance, the charge distribution, and the binding mechanism are open. Using the dynamic light scattering method and laser Doppler electrophoresis, the hydrodynamic diameter and the ζ-potential of the virus particles were measured at their concentration of 5 × 10 particles per mL and ionic strength 0.
View Article and Find Full Text PDFMaterials (Basel)
September 2022
Faculty of Mechanical Engineering, Kazimierz Pulaski University of Technology and Humanities in Radom, Stasieckiego 54, 26-600 Radom, Poland.
This paper is devoted to the sintering process of AlO-SiO-ZrO ceramics. The studied method was electroconsolidation with directly applied electric current. This method provides substantial improvements to the mechanical properties of the sintered samples compared to the traditional sintering in the air.
View Article and Find Full Text PDFInt J Environ Res Public Health
August 2022
Department of Psychiatry and Forensic Medicine, School of Medicine, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain.
Ukrainian Military Hospital retrospective analysis during a decade of conflicts (3995 records) unveils specific mental health ICD-10-CM distribution per rank and the long-lasting impact of active conflict or trench warfare. Most hospitalizations in all years of observation were among soldiers. Anxiety-related disorders have been present since 'peacetime', mainly among professional soldiers and high ranks, pointing to the need for rank-tailored psychological training in skills to reduce the anxiety burden.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
September 2022
Department of Analytical, Physical and Colloid Chemistry, O. O. Bohomolets National Medical University, Shevchenko Blvd. 13, 01601 Kiev, Ukraine.
In the mol-ecule of the title compound, CHNO, the oxime and hydrazide groups are situated in a -position in relation to the C-C bond linking the two functional groups. The CHC(=NOH)C(O)NH fragment deviates from planarity because of a twist between the oxime and amide groups. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, forming zigzag chains in the [013] and [03] directions.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
September 2022
The National University of Pharmacy, 53 Pushkinska St., Kharkiv 61002, Ukraine.
The title compound, CHNOS, can be obtained two synthetic routes. According to our investigations, the most suitable way is by the reaction of ethyl 2-bromo-acetate with sodium tosyl-sulfinate in dry DMF. It was crystallized from methanol into the monoclinic 2/ space group with a single mol-ecule in the asymmetric unit.
View Article and Find Full Text PDFGlob Chang Biol
November 2022
University of Tartu Natural History Museum, Tartu, Estonia.
Fungi are highly diverse organisms, which provide multiple ecosystem services. However, compared with charismatic animals and plants, the distribution patterns and conservation needs of fungi have been little explored. Here, we examined endemicity patterns, global change vulnerability and conservation priority areas for functional groups of soil fungi based on six global surveys using a high-resolution, long-read metabarcoding approach.
View Article and Find Full Text PDFNanotechnology
September 2022
Laboratory of Micro and Nano Optics, Institute of Radio-Physics and Electronics NASU, Kharkiv, Ukraine.
We implement the lasing eigenvalue problem (LEP) approach to study the electromagnetic field in the presence of a circular quantum wire (QW) made of a gain material and wrapped in graphene cover and a dimer of two identical graphene-covered QWs, at the threshold of stationary emission. LEP delivers the mode-specific eigenvalue pairs, namely the frequencies and the threshold values of the QW gain index for the plasmon and the wire modes of such nanolasers. In our analysis, we use quantum Kubo formalism for the graphene conductivity and classical Maxwell boundary-value problem for the field functions.
View Article and Find Full Text PDFJ Phys Chem B
September 2022
Department of Chemistry, Eszterházy Károly University, Leányka u. 6, 3300 Eger, Hungary.
Molecular dynamics simulations of mixtures of ,-dimethylformamide (DMF) with water of various compositions, covering the entire composition range, are performed on the canonical (,,) ensemble. The local structure of the mixtures is analyzed in terms of radial distribution functions and the contributions of the first five neighbors to them, various order parameters of the water molecules around each other, and properties of the Voronoi polyhedra of the molecules. The analyses lead to the following main conclusions.
View Article and Find Full Text PDFProtein Sci
September 2022
Department of Biochemistry and Molecular Biology, The University of Kansas Medical Center, Kansas City, Kansas, USA.
Cancerous tissues undergo extensive changes to their cellular environments that differentiate them from healthy tissues. These changes include changes in extracellular pH and Ca concentrations, and the exposure of phosphatidylserine (PS) to the extracellular environment, which can modulate the interaction of peptides and proteins with the plasma membrane. Deciphering the molecular mechanisms of such interactions is critical for advancing the knowledge-based design of cancer-targeting molecular tools, such as pH-low insertion peptide (pHLIP).
View Article and Find Full Text PDFPeerJ
January 2023
Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics of the CAS, v.v.i., Libechov, Czech Republic.
Interspecific hybridization can disrupt canonical gametogenic pathways, leading to the emergence of clonal and hemiclonal organisms. Such gametogenic alterations usually include genome endoreplication and/or premeiotic elimination of one of the parental genomes. The hybrid frog exploits genome endoreplication and genome elimination to produce haploid gametes with chromosomes of only one parental species.
View Article and Find Full Text PDFBiogerontology
February 2023
Research Institute of Biology, V.N. Karazin Kharkiv National University, Svobody sq, 4, Kharkiv, 61022, Ukraine.
Due to its unique redox chemistry, nanoceria is considered as potent free radical scavenger and antioxidant. However, their protective capacity in aging organisms remains controversial. To detect the anti-aging effects associated with the redox activity of 2 and 10 nm nano-CeO2, different test systems were used, including in vitro analysis, in situ assay of mitochondria function and in vivo studies of suitable nano-CeO on aging of male Wistar rats from 22 months-old to the end of life.
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