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Article
Influence of Silicon Dioxide on the Structure and Dielectric Properties of Barium Titanate
The influence of silicon dioxide on the structure and dielectric properties of ceramic barium titanate was studied. The obtained results showed that Si at concentrations up to 1 mol % enters the BaTiO3 lattice to...
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Article
Activation of Cardiac δ2-Opioid Receptors Increases Heart Tolerance to Reperfusion
Coronary occlusion (45 min) and reperfusion (120 min) in male Wistar rats in vivo, as well as total ischemia (45 min) of an isolated rat heart followed by reperfusion (30 min) were reproduced. The selective δ2-op...
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Article
The Role of δ2-Opioid Receptors in the Regulation of Tolerance of Isolated Cardiomyocytes to Hypoxia and Reoxygenation
Hypoxia (20 min) and reoxygenation (30 min) were simulated on isolated rat cardiomyocytes to evaluate the cytoprotective effect of selective δ2-opioid receptor agonist deltorphin II, opioid receptor antagonist na...
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Article
Comparative Analysis of Infarct-Limiting Activity of Peptide and Non-Peptide δ- and κ-Opioid Receptor Agonists during Heart Reperfusion In Vivo
A comparative analysis of the infarct-limiting activity of δ- and κ-opioid receptors (OR) agonists was carried out on a model of coronary occlusion (45 min) and reperfusion (120 min) in male Wistar rats. We us...
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Article
The Turuchan Pika (Ochotona turuchanensis) as an Ecosystem Engineer: Its Influence on the Growth of the Common Nettle (Urtica dioica) on Taluses
Abstract—The abundance of the common nettle on taluses was found to be strongly correlated with the abundance of signs of Turuchan pika occurrence such as feces, latrines, and haypiles collected by pikas in the c...
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Article
The Play of the Turuchan Pika (Ochotona turuchanensis Naumov 1934, Ochotonidae, Lagomorpha) in the Wild
For the first time, all three types of play (locomotor, object, and social) have been recorded and described for wild representatives of the family Ochotonidae of the order Lagomorpha. Observations have been c...
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Article
Dielectric Properties of Mixed BaTiO3–SrTiO3 Nanocomposites
The dielectric properties of mixed (1 – x)BaTiO3–xSrTiO3 nanocomposites (x = 0.0; 0.25, 0.50, 0.75, and 1.00), obtained by sintering their initial components for 5 h at a temperature of 1273 K, are studied in the...
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Article
To the Theory of Singular Integral Equations of Non-Classical Type on a Segment of a Line
Singular integral operators with piecewise continuous matrix coefficients defined on segments of the real axis in weighted Lebesgue and Holder spaces are considered. In contrast to the classical case, the sing...
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Article
Role of PI3K, ERK1/2, and JAK2 Kinases in the Cardioprotective Effect of Deltorphin II during Cardiac Reperfusion
The signaling mechanism of the cardioprotective effect of deltorphin II was studied in models of coronary occlusion (45 min) and reperfusion (120 min) in male Wistar rats. We used the selective δ2-opioid receptor...
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Article
Interstitial Edema of the Interatrial Septum in Patients with Atrial Fibrillation and Chronic Heart Failure
We studied the presence of interstitial edema of the interatrial septum in patients with chronic heart failure (CHF) with atrial fibrillation (n=23) or without rhythm disturbances (n=9). The intensity of the MRI ...
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Article
The Role of NO Synthase, MPT pore, and Protein Kinase A in the Cardioprotective Effect of the Opioid Receptor Agonist Deltorphin II
In male Wistar rats, coronary occlusion (45 min) and reperfusion (120 min) were modeled. Selective δ2-opioid receptor agonist (deltorphin II, 0.12 mg/kg) was administered intravenously 5 min before reperfusion; N...
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Article
Finds of the Turuchan Pika (Ochotona turuchanensis Naumov 1934) on the Primorsky Mountain Ridge (Irkutsk Oblast)
In June 2018 and July 2019, 14 localities of the Primorsky Mountain Ridge, Irkutsk oblast, were surveyed. According to the actual maps of the pika ranges, they are considered as lying within the Northern pika ...
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Article
Neogene Regional Scale of the Eastern Paratethys, Stratigraphy and Paleontological Basis
The stratigraphic scale of the Eastern Paratethys is revised based on a study of the Neogene stratotype and reference sections, their biotic characteristics, and paleomagnetic and sedimentological data. New da...
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Article
Photoelectronics Based on 0D Materials
The arrangement and main parameters of the photosensory structures and devices based on quantum dots of the elements of the II, IV, and VI groups of the periodic table made by colloidal chemistry methods have ...
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Article
A Refinement of Non-Uniform Estimates of the Rate of Convergence in the Central Limit Theorem Under the Existence of Moments of Orders No Higher Than Two
Non-uniform estimates of the rate of convergence in the central limit theorem for sums of independent identically distributed summands are refined under the condition that the summands possess moments of order...
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Article
Paleontological and Lithological Characteristics of the Lower Miocene Stratotype Sections of the Eastern Paratethys (Kartli Depression, Georgia)
In terms of lithology and mollusk composition, the Uplistsikhe Formation is subdivided into two subformations and five members. The Sakaraulian and Kotsakhurian regional stages are characterized by a distinct ...
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Article
2D Structures Based Field-Effect Transistors (Review)
We review the design and main parameters of field-effect transistors based on 2D structures of transition metal di- and trichalcogenides MoS2, MoSe2, MoTe2, WS2, WSe2, Mo1 ‒ xWxSe2, ZrS2, ZrSe2, HfS2, HfSe2, PtS2
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Article
2D Material-Based Photo- and Nanoelectronics. Part III. Photosensors Based on Graphene, Graphene-Like, and Related 2D Nanomaterials
We review the photosignal formation mechanisms, architecture, and main parameters of photosensors based on group-III, IV, V, and VI monoatomic 2D materials, specifically, graphene and graphene-like materials, ...
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Article
Development of the Southern Coastal Area of the Caspian Sea during the Pliocene–Quaternary According to Biostratigraphic and Magnetostratigraphic Data
The paper considers geological structure of the coastal region of the South Caspian, including paleontological and magnetostratigraphic dating of the Neogene–Quaternary deposits. Western and eastern segments o...
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Article
δ2-Opioid Receptors as a Target in Designing New Cardioprotective Drugs: the Role of Protein Kinase C, AMPK, and Sarcolemmal KATP Channels
In rats anesthetized with α-chloralose, coronary artery occlusion (45 min) and reperfusion (120 min) were modeled. The selective δ2-opioid receptor agonist deltorphin II was administered 5 min before reperfusion....
