615 results match your criteria: "Universitetskaya Emb.[Affiliation]"
Molecules
July 2024
Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia.
New heterometallic antenna terephthalate MOFs, namely, (EuM)bdc·4HO (M = Y, La, Gd) (x = 0.001-1), were synthesized by a one-step method from aqueous solutions. The resulting compounds are isomorphic to each other; the crystalline phase corresponds to Lnbdc∙4HO.
View Article and Find Full Text PDFZookeys
July 2024
Palaeontological Institute, Russian Academy of Sciences, Moscow 117997, Russia Palaeontological Institute, Russian Academy of Sciences Moscow Russia.
This study provides a comprehensive overview of the genus Förster combining DNA barcoding and current morphology. Nineteen species of were found throughout Germany, including the newly described species First species records for Germany are: Macek, 1997; Macek, 1997; (Kieffer, 1908); Macek, 1997; Macek, 1997 and Nixon, 1957. We also clarify diagnoses for the two related genera, Förster and to designate the boundaries of the genus and propose new synonymies: Buhl, 1997 is a junior synonym of (Zetterstedt, 1840); Kozlov, 1978 is a junior synonym of (Curtis, 1831).
View Article and Find Full Text PDFJ Neurosci Methods
October 2024
Research Center of Neurology, Volokolamskoye Shosse 80, Moscow 125367, Russia; Institute of Translational Biomedicine, Saint Petersburg State University, Universitetskaya Emb. 7/9, St. Petersburg 199034, Russia.
Background: Intracerebral cannulation bypasses the blood-brain barrier, and is frequently used for targeted drug delivery to specific brain structures. Despite the availability of brain infusion kits and manual injections without cannulation, the traditional design of guide cannulas continues to be utilized in research. Several protocols describing guide cannula manufacture from stainless steel needles have been published previously.
View Article and Find Full Text PDFACS Phys Chem Au
July 2024
Institute of Chemistry, Saint Petersburg State University, 26 Universitetskii pr, St. Petersburg 198504, Russia.
Int J Mol Sci
July 2024
Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, 44 Thorez Ave., 194223 Saint Petersburg, Russia.
The ammonia/ammonium (NH/NH, AM) concentration in human erythrocytes (RBCs) is significantly higher than in plasma. Two main possible mechanisms for AM transport, including simple and facilitated diffusion, are described; however, the driving force for AM transport is not yet fully characterized. Since the erythroid ammonium channel RhAG forms a structural unit with anion exchanger 1 (eAE1) within the ankyrin core complex, we hypothesized the involvement of eAE1 in AM transport.
View Article and Find Full Text PDFMolecules
June 2024
Research Institute of Applied Ecology of the North, Professor D. D. Savvinov SVFU, Lenin Ave. 43, 677027 Yakutsk, Russia.
The transition of soils into fallow state has a significant impact on the accumulation and transformation of soil organic matter (SOM). However, the issue of SOM transformation as a result of soil transition to fallow state in cryolithozone conditions is insufficiently studied. The aim of this study is to investigate the molecular weight (MW) distribution of humic acids (HAs) isolated from soils of central Yakutia.
View Article and Find Full Text PDFAdv Gerontol
June 2024
Saint-Petersburg State University, 7/9 Universitetskaya emb., St. Petersburg 199034, Russian Federation.
The significant prevalence of periodontal diseases in elderly patients makes the research relevant. By now, the issues of complex clinical and radiological semiotics of generalized periodontitis using high-tech research methods is not sufficiently studied. The research addressed the clinical picture and three-dimensional computed tomographic semiotics of severe chronic generalized periodontitis focusing 25 elderly patients with severe chronic generalized periodontitis.
View Article and Find Full Text PDFChempluschem
October 2024
Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA, 22904, USA.
Pursuing of straightforward and cost-effective methods for synthesizing high-performance anode materials for lithium-ion batteries is a topic of significant interest. This study elucidates a one-step synthesis approach for a conversion composite using glow discharge in a nickel formate solution, yielding a composite precursor comprising metallic nickel, nickel hydroxide, and basic nickel salts. Subsequent annealing of the precursor facilitated the formation of the Ni@NiO composite, exhibiting exceptional electrochemical properties as anode material in Li-ion batteries: a capacity of approximately 1000 mAh g, cyclic stability exceeding 100 cycles, and favorable rate performance (200 mAh g at 10 A g).
View Article and Find Full Text PDFParasitol Res
June 2024
Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences, 11 Pushkinskaya St., Petrozavodsk, Karelia, 185910, Russia.
Anopheles claviger (Meigen, 1804) (Diptera, Culicidae) is widespread in the western Palaearctic Region, but it was recorded in Karelia (Russia) for the first time. This record is one of the northernmost ones in the Palaearctic Region and Russia, updates the northern border of the An. claviger range.
View Article and Find Full Text PDFInt J Mol Sci
May 2024
Laboratory of Regulation of Brain Neuronal Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova Emb. 6, 199034 Saint-Petersburg, Russia.
Fetal hypoxia and maternal stress frequently culminate in neuropsychiatric afflictions in life. To replicate this condition, we employed a model of prenatal severe hypoxia (PSH) during days 14-16 of rat gestation. Subsequently, both control and PSH rats at 3 months old were subjected to episodes of inescapable stress to induce learned helplessness (LH).
View Article and Find Full Text PDFPhys Life Rev
September 2024
National Research Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Ave., Nizhny Novgorod, 603022, Russia; Moscow Institute of Physics and Technology, 9 Institutskiy Ln., Dolgoprudny, 141701, Moscow Region, Russia; Immanuel Kant Baltic Federal University, 14 A. Nevskogo St., Kaliningrad, 2
Inorg Chem
June 2024
Institute of Chemistry, St. Petersburg State University, Universitetskii av., 26, 198504 Saint Petersburg, Russia.
A series of luminescent binuclear ([dppm{Pt(NNC)}]) and mononuclear ([PPhPt(NNC)]) complexes containing pincer ligands were synthesized and characterized. Photophysical characteristics of both types of complexes were studied in dichloromethane solution. In the solid phase, the binuclear compounds adopt a syn configuration where the {Pt(NNC)} fragments are held together due to intramolecular Pt-Pt bonding and π-stacking of the pincer ligand aromatic systems.
View Article and Find Full Text PDFMar Pollut Bull
June 2024
Department of Invertebrate Zoology, Faculty of Biology, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskiy pr. 36, 117997 Moscow, Russia.
EcoQS assessment of the marine intertidal zone based on its fauna is challenging because the assemblages have a low diversity and consist of stress tolerant species. The new approach we propose is to pool foraminiferal diversity (effective number of species exp(H')) across the whole intertidal zone including the salt marsh and tidal flat. In seven fjordheads studied in northern Fennoscandia, polycyclic aromatic hydrocarbon (PAH) concentrations indicated low levels of pollution (EcoQS Excellent to Moderate).
View Article and Find Full Text PDFParasitol Res
May 2024
Department of Invertebrate Zoology, St. Petersburg State University, 199034 Universitetskaya Emb. 7/9, St. Petersburg, Russia.
The intricate relationships between parasites and hosts encompass a wide range of levels, from molecular interactions to population dynamics. Parasites influence not only the physiological processes in the host organism, but also the entire ecosystem, affecting mortality of individuals, the number of offspring through parasitic castration, and matter and energy cycles. Understanding the molecular mechanisms that govern host-parasite relationships and their impact on host physiology and environment remains challenging.
View Article and Find Full Text PDFNanomaterials (Basel)
May 2024
Faculty of Physics, St. Petersburg State University, Universitetskaya Emb. 13B, 199034 St. Petersburg, Russia.
Due to the very efficient relaxation of elastic stress on strain-free sidewalls, III-V nanowires offer almost unlimited possibilities for bandgap engineering in nanowire heterostructures by using material combinations that are attainable in epilayers. However, axial nanowire heterostructures grown using the vapor-liquid-solid method often suffer from the reservoir effect in a catalyst droplet. Control over the interfacial abruptness in nanowire heterostructures based on the group V interchange is more difficult than for group-III-based materials, because the low concentrations of highly volatile group V atoms cannot be measured after or during growth.
View Article and Find Full Text PDFMaterials (Basel)
April 2024
Laboratory of Nature-Inspired Technologies and Environmental Safety of the Arctic, Nanomaterial Research Center of the Kola Science Centre, Russian Academy of Sciences, Fersmana Str. 14, 184209 Apatity, Russia.
A simple method for the direct transformation of Sr-exchanged titanosilicate with the sitinakite structure (IONSIV) into ceramic material through cold pressing and subsequent sintering at 1100 °C for 4 h is presented. The temperature transformation of Sr-exchanged sitinakite showed the stages of recrystallization of the material with the formation of Sr-Ti phases matsubaraite (SrTi[SiO]O), jeppeite (SrTiO), tausonite (SrTiO), and rutile. Leaching experiments showed the efficiency of fixation of Sr cations in a ceramic matrix; extraction into water does not exceed 0.
View Article and Find Full Text PDFBiochem Biophys Res Commun
June 2024
Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064, St. Petersburg, Russia. Electronic address:
In the last decade, much attention was given to the study of physiological amyloid fibrils. These structures include A-bodies, which are the nucleolar fibrillar formations that appear in the response to acidosis and heat shock, and disassemble after the end of stress. One of the proteins involved in the biogenesis of A-bodies, regardless of the type of stress, is Von-Hippel Lindau protein (VHL).
View Article and Find Full Text PDFInt J Mol Sci
April 2024
Research Center of Neurology, Volokolamskoye Shosse 80, 125367 Moscow, Russia.
Cardiotonic steroids (CTSs), such as digoxin, are used for heart failure treatment. However, digoxin permeates the brain-blood barrier (BBB), affecting central nervous system (CNS) functions. Finding a CTS that does not pass through the BBB would increase CTSs' applicability in the clinic and decrease the risk of side effects on the CNS.
View Article and Find Full Text PDFComp Cytogenet
April 2024
Saint-Petersburg State University, University ave 26, St Petersburg 198504, Russia Saint-Petersburg State University St Petersburg Russia.
Polyploidy is a condition in which a cell has multiple diploid sets of chromosomes. Two forms of polyploidy are known. One of them, generative polyploidy, is characteristic of all cells of the organism, while the other form develops only in some somatic tissues at certain stages of postnatal ontogenesis.
View Article and Find Full Text PDFCells
March 2024
Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, 44 Thorez Ave., 194223 Saint Petersburg, Russia.
Pathologies such as malaria, hemorrhagic stroke, sickle cell disease, and thalassemia are characterized by the release of hemoglobin degradation products from damaged RBCs. Hematin (liganded with OH) and hemin (liganded with Cl)-are the oxidized forms of heme with toxic properties due to their hydrophobicity and the presence of redox-active Fe. In the present study, using the original LaSca-TM laser particle analyzer, flow cytometry, and confocal microscopy, we showed that both hematin and hemin induce dose-dependent RBC spherization and hemolysis with ghost formation.
View Article and Find Full Text PDFActa Crystallogr B Struct Sci Cryst Eng Mater
April 2024
Sobolev Institute of Geology and Mineralogy SB RAS, ak. Kaptug, 3, Novosibirsk, 630090, Russian Federation.
A series of novel KSrYEr(BO) (x = 0-1) phosphors that emit near-infrared radiation was synthesized using solid-state methods. Pure Y and Er crystals were grown using a KF flux via the top-seeded solution growth technique. In situ high-temperature single crystal X-ray diffraction, Raman spectroscopy and DFT calculations were used for characterization.
View Article and Find Full Text PDFA new genus, Lubomirus gen. nov., of the family Ismaridae (Hymenoptera, Diaprioidea) from the late Eocene Baltic and Rovno ambers is described and illustrated.
View Article and Find Full Text PDFRecent collection in Panti Forest Reserve in Johor, Peninsular Malaysia offered us the opportunity to better understand the species in southern Malay Peninsula. Two new species and one new genus of Meconematini are described here: Cercoteratura reflexa sp. n.
View Article and Find Full Text PDFPlants (Basel)
March 2024
Federal Scientific Center of the East Asia Terrestrial Biodiversity FEB RAS, 100th Anniversary of Vladivostok Avenue, 159, Vladivostok 690022, Russia.
The Northeast Asian endemic species of lichen-forming fungus is herein discussed in the global context of biogeography and phylogeny of the group. The name has been erroneously used by lichenologists for spp. from high latitudes or altitudes worldwide, as there are omphalodisc apothecia and rough "crystals" of a necral layer on the upper surface.
View Article and Find Full Text PDFPlants (Basel)
February 2024
Plant Biology and Biotechnology Department, Sirius University of Science and Technology, Olympic Avenue, 1, 354340 Sochi, Russia.
Tea has historically been one of the most popular beverages, and it is currently an economically significant crop cultivated in over 50 countries. The Northwestern Caucasus is one of the northernmost regions for industrial tea cultivation worldwide. The domestication of the tea plant in this region took approximately 150 years, during which plantations spreading from the Ozurgeti region in northern Georgia to the southern city of Maykop in Russia.
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