521 results match your criteria: "V N. Karazin Kharkiv National University[Affiliation]"

Novel species of fungi described in this study include those from various countries as follows: , from accumulated snow sediment sample. , on leaf spots of . , on submerged decaying wood in sea water, on , as endophyte from healthy leaves of .

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Sortase A-mediated ligation (SML) or "sortagging" has become a popular technology to selectively introduce structurally diverse protein modifications. Despite the great progress in the optimization of the reaction conditions and design of miscellaneous C- or N-terminal protein modification strategies, the reported yields of conjugates are highly variable. In this study, we have systematically investigated C-terminal protein sortagging efficiency using a combination of several rationally selected and modified acceptor proteins and a panel of incoming surrogate non-peptidic amine nucleophile substrates varying in the structural features of their amino linker parts and cargo molecules.

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North Pontic crossroads: Mobility in Ukraine from the Bronze Age to the early modern period.

Sci Adv

January 2025

UCL Genetics Institute, Research Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK.

The North Pontic region, which encompasses present-day Ukraine, was a crossroads of migration, connecting the vast Eurasian Steppe with Central Europe. We generated shotgun-sequenced genomic data for 91 individuals dating from around 7000 BCE to 1800 CE to study migration and mobility history in the region, with a particular focus on historically attested migrating groups during the Iron Age and the medieval period. We infer a high degree of temporal heterogeneity in ancestry, with fluctuating genetic affinities to different present-day Eurasian groups.

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Crohn's disease (CD) and Ankylosing Spondylitis (AS) are chronic conditions with overlapping inflammatory pathways. This research investigates the genetic association between AS and the requirement for more aggressive therapeutic interventions in CD, suggesting a likelihood of increased severity in CD progression among individuals diagnosed with AS. This study utilized two-sample Mendelian randomization (TSMR) to analyze GWAS datasets for AS and CD requiring second-line treatment.

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Human mesenchymal stromal cells (MSCs) are attractive for both medical practice and biomedical research. Nonfreezing short-term storage may provide safe and simple transportation and promote the practical use of MSCs. We aimed to determine the duration of efficient storage at ambient temperature (22°C) of human dermal MSCs in different three-dimensional organization and to investigate the role of cell metabolic mode in the resistance to the ambient storage damaging factors.

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Objective: Aim: To determine the signs of society's readiness to legalize euthanasia for palliative patients by interviewing both the patients themselves and their relatives (caregivers) and specialists who provide medical, psychological, social and spiritual services at the end-of-life.

Patients And Methods: Materials and Methods: The study was carried out using a sociological method among palliative patients of three regions of Ukraine (Lviv, Kyiv and Kharkiv) on a random sample of 377 people surveyed during 2022-2024. The conducted research confirmed and clarified the previous results with greater reliability.

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Bioinformatic approach to identifying causative missense polymorphisms in animal genomes.

BMC Genomics

December 2024

Institute of Pig Breeding and Agroindustrial Production, National Academy of Agrarian Sciences of Ukraine, 1 Shvedska Mohyla St, Poltava, 36013, Ukraine.

Background: Trends in the development of genetic markers for the purposes of genomic and marker-assisted selection primarily focus on identifying causative polymorphisms. Using these polymorphisms as markers enables a more accurate association between genotype and phenotype. Bioinformatic analysis allows calculating the impact of missense polymorphisms on the structural and functional characteristics of proteins, which makes it promising for identifying causative polymorphisms.

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Article Synopsis
  • The paper explores the use of Convolutional Neural Networks (CNNs) for detecting image steganography, focusing on SRNet's performance against different steganography techniques.
  • Initial tests revealed that SRNet struggled with Spread Spectrum Image Steganography (SSIS), leading to fine-tuning for better detection of SSIS, which improved results but slightly weakened performance on other methods.
  • The study emphasizes the need for a balance in model adaptation and suggests future research on multi-task learning and other machine learning strategies to enhance the effectiveness of steganalysis models.
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Vasculitis is a group of uncommon diseases characterized by inflammation of blood vessels, which contributes to the organ ischemia and damage. Cigarette smoke contains a high concentration of various toxins, which have the potential to affect the immune response and development of autoimmune/autoinflammatory rheumatic diseases including vasculitis. Smoking influences both innate and adaptive immune systems and plays binary functions in modulating immunity by either aggravating pathogenic immune responses or attenuating defensive immunity.

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  • Modern AI solutions struggle with the "black box" nature of deep learning models, particularly in critical medical applications where transparency is essential.
  • This study introduces a scalable method using a transition matrix to make deep learning model decisions more interpretable, integrating clinical guidelines and expert rules to ensure alignment with medical standards.
  • Tested on ECG and MRI datasets, the approach showed high agreement with expert annotations (0.89 for ECG and 0.80 for MRI), proving its reliability and potential for broader use in various medical fields.
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The hypothesis that the antibacterial effect of copper depends on its state was tested. It was studied the antibacterial effect of copper applied to the fabric, copper in chelated and free (ionic) forms on the growth intensity of and in the system after a single or "primary" contact. Classical microbiology methods were used.

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Nanostructured materials have been suggested to be used as a source of dietary zinc for livestock animals. In this study, we assessed the cytotoxicity of newly synthesized nanostructured zinc carbonate hydroxide (ZnCH) Zn(CO)(OH)microflakes. Cytotoxicity of the microflakes was assessed against murine L929 cell line and rat mature erythrocytes.

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Article Synopsis
  • Small studies suggest that low-dose oral minoxidil (LDOM) might be effective and safe for hair loss, but more extensive research and guidelines are needed.* -
  • An expert consensus statement was developed involving 43 dermatologists to standardize LDOM prescribing practices, covering various aspects like indications, dosing, and monitoring.* -
  • The consensus reached includes 76 relevant points, but topics related to pediatric use and titration protocols need further investigation, highlighting gaps in research for younger patients.*
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Oral diseases are among the most common non-communicable diseases around the globe and become a public health challenge that considerably impact general health and well-being in all ages across the lifespan. Oral health is an integral part of general health, where poor oral health and other lifestyle-related chronic diseases have a common risk factor background. The underlying causes of oral health inequalities are often complex and related to country-specific historical, economic, cultural, social, or political factors.

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Background: Following the 2022 Russian invasion, Ukraine's healthcare system suffered extensive damage, with over 1000 medical facilities destroyed, exacerbating the trauma care crisis. The absence of standardized trauma training left Ukrainian healthcare providers ill-equipped to manage the surge in trauma cases amid conflict. To bridge this gap, we implemented advanced trauma life support (ATLS) courses in Ukraine amid active warfare, aiming to enhance trauma care expertise among healthcare professionals.

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Article Synopsis
  • * Out of 3600 vaginal deliveries, 600 (16.7%) cases of maternal peripartum infections were recorded, predominantly occurring after hospital discharge, with endometritis being the most prevalent infection.
  • * Key risk factors identified for these infections included high body mass index, placenta previa, prolonged rupture of membranes, and various pregnancy-related conditions.
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The COVID-19 was reported in Wuhan, China, in December 2019. There is a link between increased mortality and obese individuals with the disease. The disease has been claimed to have disproportionately affected non-Hispanic blacks and Hispanics.

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The fast-ion phase-space distribution function in the magnetic fusion devices is always underdiagnosed, and every new fast-ion diagnostic should be carefully assessed before installation to minimize redundancies in measurements and maximize the information from the yet undiagnosed part of the fast-ion phase space distribution function. Here, we present a novel method of assessing the added value of a considered fast-ion diagnostic, taking actual geometry and an existing set of fast-ion diagnostics into account. The new method is based on a reformulation of the diagnostic weight functions in constants of motion (COM).

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Mitochondrial Aconitase and Its Contribution to the Pathogenesis of Neurodegenerative Diseases.

Int J Mol Sci

September 2024

Laboratory of Systems and Synthetic Biology, Chair of Drug and Cosmetics Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.

Article Synopsis
  • This text talks about special proteins called aconitases that help with how cells use energy and manage iron and DNA.
  • One type, Aco2, is important because it can be harmed by dangerous molecules, which can lead to problems in brain health.
  • Scientists think fixing Aco2 could help fight diseases that make our brains not work well, making it a promising area for new treatments.
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Gametogenesis produces gametes as a piece of genetic information transmitted to the offspring. While during sexual reproduction, progeny inherits a mix of genetic material from both parents, asexually reproducing organisms transfer a copy of maternal or paternal DNA to the progeny clonally. Parthenogenetic, gynogenetic and hybridogenetic animals have developed various mechanisms of gametogenesis, however, their inheritance is not fully understood.

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Random telegraph processes with nonlocal memory.

Phys Rev E

August 2024

Center for Nonlinear Science, University of North Texas, P.O. Box 311427, Denton, Texas 76203-5370, USA.

We study two-state (dichotomous, telegraph) random ergodic continuous-time processes with dynamics depending on their past. We take into account the history of the process in an explicit form by introducing integral nonlocal memory term into conditional probability function. We start from an expression for the conditional transition probability function describing additive multistep binary random chain and show that the telegraph processes can be considered as continuous-time interpolations of discrete-time dichotomous random sequences.

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Gramicidin S (GS), one of the first discovered antimicrobial peptides, still shows strong antibiotic activity after decades of clinical use, with no evidence of resistance. The relatively high hemolytic activity and narrow therapeutic window of GS limit its use in topical applications. Encapsulation and targeted delivery may be the way to develop the internal administration of this drug.

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Intradialytic hypotension (IDH) is a common and potentially life-threatening complication in hemodialysis patients. Traditional preventive measures have shown limited effectiveness in reducing IDH incidence. This systematic review evaluates the existing literature on the use of artificial intelligence (AI) and machine learning (ML) models for predicting IDH in hemodialysis patients.

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