615 results match your criteria: "Universitetskaya Emb.[Affiliation]"

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.

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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).

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Biocompatibility and customizability: Expanding possibilities with 3D printed guide cannulas.

J 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.

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Article Synopsis
  • Genetically encoded voltage indicators (GEVIs), especially those based on archaerhodopsin-3, are useful for visualizing changes in cell membrane potential.
  • To improve these tools, researchers aimed to create new GEVIs with better fluorescence and absorption properties.
  • The study successfully enhanced the fluorescence of archaerhodopsin-3 by stabilizing specific protein conformations through targeted mutations, leading to the design of new variants with a broader absorption range and significantly brighter emissions.
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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.

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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.

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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.

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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).

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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.

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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).

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Bridging nonlinear dynamics and physiology: Implications for CPGs and biomimetic robotics. Reply to comments on "Control of movement of underwater swimmers: Animals, simulated animates and swimming robots".

Phys 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

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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.

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Measuring ecological quality status in low-diversity Arctic intertidal foraminiferal assemblages using a diversity-based index.

Mar 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).

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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.

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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.

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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.

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Von-Hippel Lindau protein amyloid formation. The role of GST-tag.

Biochem 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).

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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.

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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.

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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.

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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.

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Recent 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.

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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.

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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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