New insights in the systematics of the Hemiuroidea (Digenea: Hemiurata) based on the integrative taxonomy approach.

Opistholecithum sandugaense n. g. n.

Isovalent substitution-induced pseudodoping in ZrxTi1-xSe2 transition metal dichalcogenides.

The crystal and electronic structure of ZrxTi1-xSe2 (0 < x < 1) compounds and their electrical resistivity have been studied in detail for the first time. A combination of soft x-ray spectroscopic methods (XPS, XAS, and ResPES) was used to investigate the electronic structure. The lattice parameters as a function of the metal concentration x obey Vegard's law.

Magnetization of immobilized multi-core particles with varying internal structures.

This work is devoted to the study of the static magnetization of immobilized multi-core particles (MCPs) and their ensembles. These objects model aggregates of superparamagnetic nanoparticles that are taken up by biological cells and subsequently used, for example, as magnetoactive agents for cell imaging. In this study, we derive an analytical formula that allows us to predict the static magnetization of MCPs consisting of immobilized granules, in which the magnetic moment rotates freely the Néel mechanism.

The nuclear DNA and RNA distribution in Pelomyxa spp. (Amoebozoa, Archamoebae, Pelobiontida) revealed by a simple-to-use DAPI/pyronin staining method.

The genus Pelomyxa includes 15 species of anaerobic Archamoebae with remarkable diverse nucleoplasm morphology. Nuclear structures, like chromatin and nucleoli, of several members of the genus was previously identified only based on their ultrastructural similarity to typical structures of somatic cells of higher eukaryotes. Here, we explored an easy-to-use, one-step intravital staining method with DAPI and pyronin to distinguish between DNA and RNA structures in nuclei of unfixed cells of Pelomyxa belevskii and P.

[Immunological status in patients with amenorrhea (literature review)].

Amenorrhea is a common symptom of a whole range of nosologies among women of reproductive age, which can accompany any endocrinopathy in the stage of decompensation. In all the diversity of various links in the pathogenesis of reproductive disorders, the problem of immunopathology remains a little aside, however, the significance of these disorders is underestimated. This publication provides an overview of immune system abnormalities in a women with amenorrhea.

[Development of prognostic clinical and genetic models of the risk of low bone mineral density using neural network training].

Background: Osteoporosis is a common age-related disease with disabling consequences, the early diagnosis of which is difficult due to its long and hidden course, which often leads to diagnosis only after a fracture. In this regard, great expectations are placed on advanced developments in machine learning technologies aimed at predicting osteoporosis at an early stage of development, including the use of large data sets containing information on genetic and clinical predictors of the disease. Nevertheless, the inclusion of DNA markers in prediction models is fraught with a number of difficulties due to the complex polygenic and heterogeneous nature of the disease.

ANRORC type rearrangement/intermolecular cyclocondensation cascade of 5,6-dicyano-3-(2-oxo-2-ethyl)pyrazin-2(1)-ones with hydrazine hydrate for the synthesis of 2-(pyrazol-3-yl)imidazo[4,5-]pyridazines.

A novel HSO-catalyzed ANRORC-type rearrangement of pyrazinones to imidazoles proceeding through pyridazino[]annulation with simultaneous introduction of a pyrazole ring at position 2 of the imidazole system has been developed, which offers efficient and expedited access to new biheterocyclic systems - 2-(pyrazol-3-ul)imidazoles and 2-(pyrazol-3-yl)imidazo[4,5-]pyridazines. Diverse bi--heterocyclic systems with the imidazo[4,5-]pyridazine-4,7-diamine moiety could be obtained in excellent yield when 5,6-dicyano-3-(2-oxo-2-ethyl)pyrazin-2(1)-ones interact with hydrazines the selective spiro-formation in a tandem ring-opening/ring-closing process, which allowed the simultaneous construction of five new C-N bonds. This new method is compatible with an array of functional groups, proceeds under mild reaction conditions with the involvement of commercially available reagents.

Environmental impacts of restructuring the EU's natural gas supply and consumption: Learnings from the 2022 energy crisis.

In 2022, the European Union put forward the REPowerEU plan in response to Russia's invasion of Ukraine, aiming at enhancing short-term energy security by diversifying imports and reducing natural gas demand while accelerating the deployment of renewable alternatives in the long term. Here, we quantify the life cycle environmental impacts of both REPowerEU's short-term measures, including the controversial extended coal-fired power plant operations, and how the first year of the crisis was managed in practice. We find that the policy measures' impact on greenhouse gas (GHG) emissions would be negligible, although they could have detrimental effects on other environmental categories.

Devonian-Mississippian magmatism related to extensional collapse in Svalbard: implications for radiating dyke swarms.

Background: Despite extensive studies of the Mesozoic-Cenozoic magmatic history of Svalbard, little has been done on the Paleozoic magmatism due to fewer available outcrops.

Methods: 2D seismic reflection data were used to study magmatic intrusions in the subsurface of eastern Svalbard.

Results: This work presents seismic evidence for west-dipping, Middle Devonian-Mississippian sills in eastern Spitsbergen, Svalbard.

Higher monomeric C-reactive protein levels are associated with premature coronary artery disease.

Introduction: Chronic inflammation is a major risk factor for coronary artery disease (CAD). Currently, the inflammatory cardiovascular risk is assessed via C-reactive protein (CRP) levels measured using a high-sensitivity assay (hsCRP). Monomeric CRP (mCRP) is a locally produced form of CRP that has emerged as a potential biomarker of inflammation.

Modeling of the Carbohydrate Oxacarbenium Ionic Intermediates of Glycosylation Reactions with Explicit Account for Protective Group Effects.

O-Protected oxacarbenium ions are key intermediates of glycosylation reactions. The knowledge of their conformational preferences is crucial for choosing the correct blocking group pattern to achieve the required stereochemical outcome. This article describes a computational study of several glucosyl oxacarbenium cations.

Diagnosis and management of de novo non-specific spinal infections: European Association of Neurosurgical Societies (EANS) Spine Section Delphi consensus recommendations.

Introduction: The management of de novo non-specific spinal infections (spondylodiscitis - SD) remains inconsistent due to varying clinical practices and a lack of high-level evidence, particularly regarding the indications for surgery.

Research Question: This study aims to develop consensus recommendations for the diagnosis and management of SD, addressing diagnostic modalities, surgical indications, and treatment strategies.

Material And Methods: A Delphi process was conducted with 26 experts from the European Association of Neurosurgical Societies (EANS).

A case report of unilateral development of painful thyroiditis used as a hallmark of the nervous nature of its pathogenesis.

Background: Painful thyroiditis (PT) combines several variants of pathology. The most common is subacute thyroiditis (ST). Despite the prevailing view that the factors underlying the development of ST have an infectious origin, its viral and bacterial pathogeneses remain unclear.

Ultrasound, Doppler and other signs during drug-free transition from subclinical hypothyroidism to euthyroidism: a case report.

Background: It is known that subclinical hypothyroidism (SCH) often converts to euthyroidism. However, the mechanism of such changes is unclear and can only be speculated. This difficulty is likely due to limitations in diagnostic guidelines and their interpretation.

How grain structure evolution affects the kinetics of a solid-state reaction: a case of interaction between iridium and zirconium carbide.

This work investigates the solid-state reaction between iridium and zirconium carbide, resulting in the formation of carbon and ZrIr-an intermetallic compound of great interest for modern high-temperature materials science. We have found a transition of kinetic regimes in this reaction: from linear kinetics (when the chemical reaction is a limiting stage) at 1500 and 1550 °C to 'non-parabolic kinetics' at 1600 °C. Non-parabolic kinetics is characterized by the thickness of the product layer being proportional to a power of time less than 1/2.

Anisotropy of the Orientation Selectivity in the Visual Cortex Area 18 of Cats Reared Under Normal and Altered Visual Experience.

The "oblique effect" refers to the reduced visual performance for stimuli presented at oblique orientations compared to those at cardinal orientations. In the cortex, neurons that respond to specific orientations are organized into orientation columns. This raises the question: Are the orientation signals in the iso-orientation columns associated with cardinal orientations the same as those in the iso-orientation columns associated with oblique orientations, and is this signal influenced by experience? To explore this, iso-orientation columns in visual area 18 were examined using optical imaging techniques.

The impact of cytokines and tumour-conditioned medium on the properties of murine in vitro generated myeloid-derived suppressor cells.

Myeloid-derived suppressor cells (MDSCs) are a heterogeneous group of immature myeloid cells playing a critical role in immune suppression. In vitro-generated MDSCs are a convenient tool to study the properties of tumour-associated MDSCs. Here, we compared six protocols for in vitro generation of functional mouse MDSCs from bone marrow progenitors.

Role of Glycolysis and Nitric Oxide Pathway Crosstalk in Macrophages in Atherosclerosis.

Atherosclerosis is a complex multifactorial process that occurs in the vascular wall over many years and is responsible for a number of major diseases that affect quality of life and prognosis. A growing body of evidence supports the notion that immune mechanisms underlie atherogenesis. Macrophages are considered one of the key participants in atherogenesis, but their role in this process is multifaceted, which is largely due to the peculiarities of their cellular metabolism.

Epigenetic Threads of Neurodegeneration: TFAM's Intricate Role in Mitochondrial Transcription.

There is a myriad of activities that involve mitochondria that are crucial for maintaining cellular equilibrium and genetic stability. In the pathophysiology of neurodegenerative illnesses, mitochondrial transcription influences mitochondrial equilibrium, which in turn affects their biogenesis and integrity. Among the crucial proteins for keeping the genome in optimal repair is mitochondrial transcription factor A, more commonly termed TFAM.

Viral metagenomics in wild ducks reveals the presence of seadornaviruses in Siberia.

Seadornavirus is a genus of mosquito-borne viruses that includes Banna virus, which was first discovered in human patients with encephalitis and fever, as well as Kadipiro virus and Liao ning virus. In this study, we used metagenomics to investigate the diversity of viruses in wild ducks and detected both Banna virus and Kadipiro virus in wild birds in Siberia. These data suggest that seadornaviruses, which were previously only found in South East Asia, are also circulating in Northern Eurasia.

London dispersion forces and steric effects within nanocomposites tune interaction energies and chain conformation.

The interplay between attractive London dispersion forces and steric effects due to repulsive forces resulting from the Pauli principle often determines the geometry and stability of nanostructures. Aromatic polyimides (PI) and carbon nanotubes (CNT) were chosen as building blocks as two components in the hetero delocalized electron nanostructures. Two PIs, having the same diamine part and different linkage substituents between two phenyl rings of dianhydride part, one linked with ether bond (C-O-C) (OPI), the other with C-(CF3)2 (FPI), were investigated.

The First Multiomics Association Study of Trace Element and Mineral Concentration and RNA Sequencing Profiles in Human Cancers.

Integration of various types of omics data is an important trend in contemporary molecular oncology. In this regard, high-throughput analysis of trace and essential elements in cancer biosamples is an emerging field that has not yet been sufficiently addressed. For the first time, we simultaneously obtained gene expression profiles (RNA sequencing) and essential and trace element profiles (inductively coupled plasma mass spectrometry) for a set of human cancer samples.

Effect of 8-Oxo-1,-Ethenoadenine Derivatives on the Activity of RNA Polymerases from SARS-CoV-2 and .

Bacterial and viral RNA polymerases are promising targets for the development of new transcription inhibitors. One of the potential blockers of RNA synthesis is 7,8-dihydro-8-oxo-1,-ethenoadenine (oxo-εA), a synthetic compound that combines two adenine modifications: 8-oxoadenine and 1,-ethenoadenine. In this study, we synthesized oxo-εA triphosphate (oxo-εATP) and showed that it could be incorporated by the RNA-dependent RNA polymerase of SARS-CoV-2 into synthesized RNA opposite template residues A and G in the presence of Mn ions.

Role of Non-Canonical Stacking Interactions of Heterocyclic RNA Bases in Ribosome Function.

Identification and analysis of repetitive elements (motifs) in DNA, RNA, and protein macromolecules is an important step in studying structure and functions of these biopolymers. Functional role of NA-BSE (non-adjacent base-stacking element, a widespread tertiary structure motif in various RNAs) in RNA-RNA interactions at various stages of the ribosome function during translation has been investigated in this work. Motifs of this type have been described to date that are reversibly formed during mRNA decoding, moving of the ribosome subunits relative to each other, and moving mRNA and tRNA along the ribosome during translocation.

Effect of C- and N-Terminal Polyhistidine Tags on Aggregation of Influenza A Virus Nuclear Export Protein.

Nuclear export protein (NEP) of the influenza A virus, being one of the key components of the virus life cycle, is a promising model for studying characteristics of formation of amyloids by viral proteins. Using atomic force microscopy, comparative study of aggregation properties of the recombinant NEP variants, including the protein of natural structure, as well as modified variants with N- and C-terminal affinity His-tags, was carried out. All protein variants under physiological conditions are capable of forming aggregates of various morphologies: micelle-like nanoparticles, flexible protofibrils, rigid amyloid fibrils, etc.