3,508 results match your criteria: "Saint-Petersburg State University[Affiliation]"
ChemSusChem
December 2024
North China Electric Power University, College of Environmental Science and Engineering, CHINA.
Although Pb-based metal halide perovskites (MHPs) have excellent photoelectric characteristics, their toxicity remains a limiting factor for their widespread application. In the paper, a series of CsCuClxBr3-x (x = 1, 2, 3) MHP microcrystals were developed and their hydrogen evolution performance in ethanol and HX (X = Cl, Br) was also studied. Among them, CsCuCl3 microcrystals exhibit high hydrogen evolution performance in both HX and ethanol, attributed to their longest average lifetime and suitable band structure.
View Article and Find Full Text PDFZh Nevrol Psikhiatr Im S S Korsakova
December 2024
Akhunbaev Kyrgyz State Medical Academy, Bishkek, Kyrgyzstan.
Objective: To investigate the structural and functional characteristics of the carotid and vertebral arteries and their relationship with tumor necrosis factor-alpha (TNF-α) levels in patients with chronic non-infectious diseases (CNIDs), considering sex differences.
Unlabelled: Material and Methods. A retrospective analysis of clinical and laboratory data of 760 patients with chronic non-communicable diseases (average age 52.
Zh Nevrol Psikhiatr Im S S Korsakova
December 2024
Bekhterev National Medical Research Center for Psychiatry and Neurology, St. Petersburg, Russia.
The review article discusses the relationship of metabolic disorders with schizophrenia and antipsychotic therapy, the importance of metabolic syndrome for the health of patients with schizophrenia. Risk factors for the development of metabolic syndrome are considered. The metabolic side effects of various antipsychotics are characterized.
View Article and Find Full Text PDFZh Nevrol Psikhiatr Im S S Korsakova
December 2024
Saint Petersburg State University, St. Petersburg, Russia.
Objective: To evaluate the autonomic dysfunction of cardiovascular system (CVS) in patients with post-COVID syndrome with the help of active orthotest and heart rate variability methods.
Material And Methods: 70 patients with PCOS were examined, who were divided into 2 groups. Group 1 patients received standard therapy and Cytoflavin for 35 days, Group 2 patients received only standard therapy.
Zh Nevrol Psikhiatr Im S S Korsakova
December 2024
Saint Petersburg State University, St. Petersburg, Russia.
The literature review is devoted to the problem of the relationship between dementia and depression, the role of depression as a risk factor for dementia and the place of depression in the structure of neurocognitive disorders in dementia. Epidemiological data are presented and the mechanisms of interrelation of disorders are considered. The search for sources included only qualitative research, meta-analyses, full-text articles and was conducted in the PubMed, Google system using the keywords «dementia, depression».
View Article and Find Full Text PDFZh Nevrol Psikhiatr Im S S Korsakova
December 2024
Kirov Military Medical Academy, St. Petersburg, Russia.
The gut microbiota is a community of microorganisms that live in the digestive tract of living beings and form bidirectional symbiotic relationships with them. It is known that gut bacteria play an important role in maintaining the functioning of the host organism, and disruption in the normal composition of the gut microbiota can contribute to the development of many diseases. The study of microbiota has been gaining popularity in recent years, and its influence on the course of various pathological conditions is becoming more and more undeniable.
View Article and Find Full Text PDFMicrobiol Resour Announc
December 2024
All-Russia Research Institute for Agricultural Microbiology, Pushkin, Petersburg, Russia.
In this study, we sequence, assemble, and analyze the genome of endophyte Can02R isolated from the roots of the resurrection plant host, . The assembly of the strain's genome amounts to 3,965,760 bp and contains 3,989 coding sequences, among which synthetic antibiotic clusters and multidrug resistance transporters can be found.
View Article and Find Full Text PDFMicrobiol Resour Announc
December 2024
All-Russia Research Institute for Agricultural Microbiology, Pushkin, Russia.
In this article, we announce the sequence and draft analysis of the genome of endophyte strain Apn01R, isolated from the roots of (Bieb.) Fisch. Our results show genes that may be crucial to defy abiotic stress and repel bacterial and fungal pathogens.
View Article and Find Full Text PDFHeliyon
December 2024
Department of Technology and Safety of Food Products, Kazakh National Agrarian Research University, Almaty, Kazakhstan.
The main research objective of this study is to conduct a detailed econometric analysis of the factors affecting the competitiveness of cereal production in Northern Kazakhstan and the Volga region of Russia, focusing on climatic conditions, irrigation systems, and soil cultivation technologies. The assessment of grain production competitiveness was considered for the period 2018-2020 in the context of the following indicators: grain yield, grain sown area, and gross grain harvest. The data analysis also included indicators of annual domestic grain consumption and total grain production in Kazakhstan and Russia.
View Article and Find Full Text PDFInt J Mol Sci
November 2024
Department of Solid-State Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russia.
This paper presents the results of a study on the characteristics of semiconductor sensors based on thin SnO films modified with antimony, dysprosium, and silver impurities and dispersed double Pt/Pd catalysts deposited on the surface to detect carbon monoxide (CO). An original technology was developed, and ceramic targets were made from powders of Sn-Sb-O, Sn-Sb-Dy-O, and Sn-Sb-Dy-Ag-O systems synthesized by the sol-gel method. Films of complex composition were obtained by RF magnetron sputtering of the corresponding targets, followed by technological annealing at various temperatures.
View Article and Find Full Text PDFPolymers (Basel)
November 2024
Chemistry Department, Lomonosov Moscow State University, Leninskye Gory 1, 119991 Moscow, Russia.
To prepare novel biodegradable copolymers with functional substituents that are distributed statistically or randomly over the macromolecule chain and have improved characteristics compared to homopolymers, we conducted a series of synthetic experiments with a novel cyclic monomer, 5-(benzyloxy)-1,3-dioxepan-2-one (). This compound was synthesized, and its homopolymer, as well as its copolymers with L-lactide, ε-caprolactone and trimethylene carbonate, were prepared in a polymerization solution with stannous octoate as the initiator. The formation of the copolymers was confirmed using NMR spectroscopy and DSC data.
View Article and Find Full Text PDFMolecules
December 2024
Biomedical Science and Technology Park, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia.
Mass-spectrometry-based assays nowadays play an essential role in biomedical research and clinical applications. There are different types of commercial mass spectrometers on the market today, and triple quadrupole (QqQ) is one of the time-honored systems. Here, we overview the main areas of QqQ applications in biomedicine and assess the current level, evolution, and trends in the use of QqQ in these areas.
View Article and Find Full Text PDFMolecules
November 2024
Pharmaceutical Chemistry and Centre of Excellence for Pharmaceutical Sciences, North-West University, Potchefstroom 2520, South Africa.
Monoamine oxidase (MAO) plays a key role in the pathogenesis of central nervous system disorders, and MAO inhibitors have been used in the treatment of depression and Parkinson's disease. In the search for new classes of MAO inhibitors, the present study investigated a series of 1,2,4-oxadiazin-5(6)-one derivatives. This study provides the first optimization of the reaction conditions for the condensation of amidoximes with alkyl 2-halocarboxylates to yield the desired 1,2,4-oxadiazin-5(6)-ones.
View Article and Find Full Text PDFNanomaterials (Basel)
November 2024
Department of Orthopaedics and Rehabilitation Medicine, Tufts University School of Medicine, Boston, MA 02111, USA.
3D-printed microporous titanium scaffolds enjoy good biointegration with the residuum's soft and bone tissues, and they promote excellent biomechanical properties in attached prostheses. Implant-associated infection, however, remains a major clinical challenge. Silver-based implant coatings can potentially reduce bacterial growth and inhibit biofilm formation, thereby reducing the risk of periprosthetic infections.
View Article and Find Full Text PDFPlants (Basel)
December 2024
Laboratory of Molecular and Cell Biology, All-Russia Research Institute for Agricultural Microbiology, 196608 Saint Petersburg, Russia.
Insecticides are used commonly in agricultural production to defend plants, including legumes, from insect pests. It is a known fact that insecticides can have a harmful effect on the legume-rhizobial symbiosis. In this study, the effects of systemic seed treatment insecticide Imidor Pro (imidacloprid) and foliar insecticide Faskord (alpha-cypermethrin) on the structural organization of pea ( L.
View Article and Find Full Text PDFPlants (Basel)
November 2024
All-Russia Research Institute for Agricultural Microbiology, Podbelskogo Hwy 3, Pushkin, 196608 Saint Petersburg, Russia.
The aim of this research was to study the effect of plant-growth-promoting bacteria (PGPB) isolated from the drought-tolerant plants camel thorn ( (M.Bieb.) Fisch) and white pigweed ( L.
View Article and Find Full Text PDFDiagnostics (Basel)
November 2024
Department of the Structure and Function of Chromosomes, Institute of Molecular and Cellular Biology, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia.
Background/objectives: A modern classification distinguishes between two nosological entities posing an intermediate risk between differentiated and anaplastic carcinoma: poorly differentiated thyroid carcinoma and differentiated high-grade thyroid carcinoma. There are currently few studies searching for the preoperative molecular genetic markers of high-grade papillary thyroid carcinoma (PTC HG), primarily because of a recent WHO reclassification and singling out of a separate entity: high-grade follicular cell-derived nonanaplastic thyroid carcinoma. Therefore, this work was aimed at identifying PTC HG-specific microRNAs and mRNAs that reliably distinguish them from differentiated papillary thyroid carcinoma in preoperative cytology specimens (fine-needle aspiration biopsies).
View Article and Find Full Text PDFJ Endourol
December 2024
Urology Unit, Azienda Ospedaliero-Universitaria delle Marche, Ancona, Italy.
We aim to evaluate stone-free rate (SFR) and complications after flexible ureteroscopy (F-URS) for kidney stones, using a flexible and navigable suction ureteral access sheath (FANS), comparing thulium fiber laser (TFL) and high-power holmium:yttrium-aluminum-garnet laser (HPHL). Data from adults who underwent F-URS in 15 centers were prospectively analyzed (August 2023-January 2024). Exclusion criteria were ureteral stones, concomitant bilateral procedures, and renal abnormalities.
View Article and Find Full Text PDFMil Med Res
December 2024
Department of Urology, University College Hospital of London, London, NW1 2BU, UK.
Urology
December 2024
S.H. Ho Urology Centre, Department of Surgery, The Chinese University of Hong Kong, Hong Kong, China. Electronic address:
Objective: To assess urologists' perceptions and current practices of using suction-based techniques and technologies in percutaneous nephrolithotomy (PCNL) and retrograde intrarenal surgery (RIRS) for kidney stones.
Materials And Methods: A customized web-based 28-item questionnaire was created. All participation was voluntary.
J Comput Chem
January 2025
Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia.
In the framework of SMD approach a systematic computational study of structural, electronic and thermodynamic properties of molecular complexes of Cl, ICl and I with series of N-containing Lewis bases in solvents of different polarity was carried out. Results indicate that molecular complexes of Cl with strong and medium-strong LB undergo spontaneous ionization in the acetonitrile solution. The increase of the solvent polarity can change the nature of interaction in X'XLB systems from molecular X'X ← LB donor-acceptor complexes to 3-center 4-electron bound X'→X ← LB in solvents of medium polarity and to the contact ion pairs X'→[XLB] in polar solvents.
View Article and Find Full Text PDFBeilstein J Org Chem
December 2024
Saint Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya Naberezhnaya, St. Petersburg 199034, Russia.
Methods for the preparation of 3-aryl-2-azirine-2,2-dicarboxylic acids and their amides, esters, and azides by FeCl-catalyzed isomerization of 3-aryl-5-chloroisoxazole-4-carbonyl chlorides into 3-aryl-2-azirine-2,2-dicarbonyl dichlorides followed by their reaction with nucleophiles are reported. Two approaches to the preparation of 3-aryl-5-chloroisoxazole-4-carbonyl chlorides have been developed.
View Article and Find Full Text PDFInorg Chem
December 2024
Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation.
Cocrystallization of CuI with NCNMe in the presence of substituted perfluoroarenes─iodoperfluorobenzene (IFB), 4,4'-diiodoperfluorobiphenyl (4,4'-FIBP), and 4-bromoperfluorobenzonitrile (4-BrFBN)─led to the formation of three types of adducts ·2(IFB), ·4,4'FIBP, and ·4-BrFBN ( is CuI(NCNMe)), all studied by X-ray crystallography. In these cocrystals, the coordinated nitrile N atom (whose electron pair is engaged in metal coordination) still acts as an electron donor, forming π-hole interactions, specifically, π-hole···N, with the perfluoroarenes. These interactions were examined in the context of their occurrence alongside other interactions involving C atoms of the electron-deficient aromatic rings and nucleophilic atoms of the copper cluster.
View Article and Find Full Text PDFParasitology
December 2024
French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel.
The functional diversity structure of a community can be represented as a combination of three additive components (species dominance D, functional redundancy R, and functional diversity Q) (DRQ approach in which different facets of functional differences between species are considered simultaneously). We applied this concept to assemblages of fleas and gamasid mites parasitic on small mammals at continental (across regions of the Palearctic) and regional (across sampling sites in Slovakia) scales and asked: What are the relative effects of host species, biome/habitat type, and geographic locality on the DRQ composition of a parasite assemblage? At the continental scale, regions were partitioned according to predominant biome or geographic position in a continental section. At the regional scale, sampling sites were partitioned according to habitat type or geographic locality.
View Article and Find Full Text PDFJ Phys Chem B
December 2024
Department of Nuclear Physics Research Methods, Saint Petersburg State University, 7/9 Universitetskaya nab, Saint Petersburg 199034, Russia.
Although lithium salts are the most successful materials for electrochemical devices so far, there is growing interest in electrolytes containing divalent and trivalent salts, which are characterized by a much higher energy density than lithium systems. For this purpose, the physical and chemical properties of solutions of aluminum nitrate in ethylammonium nitrate (EAN) were studied in a number of works. However, it was demonstrated by the H NMR method that solutions contain water (from aluminum crystallohydrates) in the first solvated shell of the Al cation even after usual drying procedures, and this solvated water cannot be directly detected by the standard Karl Fischer analysis.
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