Hengzongshu/ArticleAgent huggingface dataset:
Serial block-face scanning electron microscopy (SBF-SEM) was used here to study tobacco male meiosis. Three-dimensional ultrastructural analyses revealed that intercellular nuclear migration (INM) occurs in 90-100% of tobacco meiocytes. At the very beginning of meiosis, every meiocyte connected with neighboring cells by more than 100 channels was capable of INM. At leptotene and zygotene, the nucleus in most tobacco meiocytes approached the cell wall and formed nuclear protuberances (NPs) that crossed the cell wall through the channels and extended into the cytoplasm of a neighboring cell. The separation of NPs from the migrating nuclei and micronuclei formation were not observed. In some cases, the NPs and nuclei of neighboring cells appeared apposed to each other, and the gap between their nuclear membranes became invisible. At pachytene, NPs retracted into their own cells. After that, the INM stopped. We consider INM a normal part of tobacco meiosis, but the reason for such behavior of nuclei is unclear. The results obtained by SBF-SEM suggest that there are still many unexplored features of plant meiosis hidden by limitations of common types of microscopy and that SBF-SEM can turn over a new leaf in plant meiosis research.
The interaction of octafluorotoluene (1a), as well as pentafluorobenzonitrile (1b) with tert-butylamine, followed by the oxidation of thus formed tert-butylanilines (2a,b) with meta-chloroperoxybenzoic acid led to functionalized perfluorinated phenyl tert-butyl nitroxides [namely, 4-(N-tert-butyl(oxyl)amino)heptafluorotoluene (3a) and 4-(N-tert-butyl(oxyl)amino)tetrafluorobenzonitrile (3b)] with nearly quantitative total yields. The molecular and crystal structures of nitroxide 3a were proved by single crystal X-ray diffraction analysis. The radical nature of both nitroxides was confirmed by ESR data. The interaction of Cu(hfac)2 with the obtained nitroxides 3a,b gave corresponding trans-bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato-κ2O,O')bis{4-(N-tert-butyl(oxyl)amino)perfluoroarene-κO}copper (II) complexes ([Cu(hfac)2(3a)2] and [Cu(hfac)2(3b)2]). X-ray crystal structure analysis showed square bipyramid coordination of a centrally symmetric Cu polyhedron with the axial positions occupied by oxygen atoms of the nitroxide groups. Magnetic measurements revealed intramolecular ferromagnetic exchange interactions between unpaired electrons of Cu(II) ions and paramagnetic ligands, with exchange interaction parameters JCu-R reaching 53 cm-1.
Results of numerical computations of supersoni flow patterns in axisymmetric inlets with the internal compression of the airstream captured by them are presented. The simplest inlets in the form of conical funnels were under consideration. The characteristic feature of supersonic flows in these inlets is the formation of an initial longitudinally-curved shock wave with intensity increasing downstream and toward the flow axis, which is finalized by the generation of a triple-shock configuration including the initial incident shock wave, a central Mach disk, and a reflected shock wave. Conditions of forming these flows were investigated depending on the freestream Mach number, angle of the internal cone wall, and relative cross-sectional area of the inlet throat. A range of the freestream Mach number M = 2-12 was covered. There were determined the throat area required for the inlet starting and that minimal throat area at which the supersonic inflow into the started inlet still possible. An analysis of starting conditions of some axisymmetric inlets of internal compression tested at M = 7.5-11.5 in hot-shot wind tunnels was fulfilled. Firstly, data of these inlets tests were compared with data of numerical computations of flows in them carried out with the use of the pseudo-unsteady method for simulation of inviscid, laminar, and turbulent flows. Secondly, there was solved a problem on evolution of the unsteady turbulent flow forming in a common process of starting a hot-shot wind tunnel and a funnel-shaped inlet tested in it.
A new numerical method is developed for solution of the Gel'fand - Levitan - Marchenko inverse scattering integral equations. The method is based on the fast inversion procedure of a Toeplitz Hermitian matrix and special bordering technique. The method is highly competitive with the known discrete layer peeling method in speed and exceeds it noticeably in accuracy at high reflectance.
Human telomeres as well as more than 40% of human genes near the promoter regions have been found to contain the sequence that may form a G-quadruplex structure. Other non-canonical DNA structures comprising bulges, hairpins, or bubbles may have a functionally important role during transcription, replication, or recombination. The guanine-rich regions of DNA are hotspots of oxidation that forms 7,8-dihydro-8-oxoguanine, thymine glycol, and abasic sites: the lesions that are handled by the base excision repair pathway. Nonetheless, the features of DNA repair processes in non-canonical DNA structures are still poorly understood. Therefore, in this work, a comparative analysis of the efficiency of the removal of a damaged nucleotide from various G-quadruplexes and bulged structures was performed using endonuclease VIII-like 1 (NEIL1), human 8-oxoguanine-DNA glycosylase (OGG1), endonuclease III (NTH1), and prokaryotic formamidopyrimidine-DNA glycosylase (Fpg), and endonuclease VIII (Nei). All the tested enzymes were able to cleave damage-containing bulged DNA structures, indicating their important role in the repair process when single-stranded DNA and intermediate non–B-form structures such as bubbles and bulges are formed. Nevertheless, our results suggest that the ability to cleave damaged quadruplexes is an intrinsic feature of members of the H2tH structural family, suggesting that these enzymes can participate in the modulation of processes controlled by the formation of quadruplex structures in genomic DNA.
Oriental Journal of Chemistry is a peer reviewed quarterly research journal of pure and applied chemistry. It publishes standard research papers in almost all thrust areas of current chemistry of academic and commercial importance.

It provides a platform for rapid publication of quality research papers, reviews and chemistry letters.

Oriental Journal of Chemistry is abstracted and indexed in almost all reputed National and International agencies.
Aim . To determine the prevalence of hypertension (HTN) in patients with acute pancreatitis (AP), chronic pancreatitis (CP), pancreatic cancer (PC) and establish associations of HTN with other risk factors (obesity, dyslipidemia (DLP), plasma glucose ≥7,0 mmol/l, smoking, alcohol consumption).

Material and methods . This observational multicenter clinical cross-sectional uncontrolled study included 44 patients with AP, 97 patients with CP and 45 patients with PC. The groups were comparable by sex and age. The HTN was diagnosed according to the criteria of Russian Society of Cardiology (2020).

Conclusion . HTN was more often observed in patients with PC than in those with AP. In patients with CP, the prevalence of HTN did not differ from those with AP or PC. HTN was a cofactor to other metabolic risk factors (glucose ≥7,0 mmol/l, obesity) in patients with AP or CP; behavioral risk factors, on the contrary, were less common in HTN patients with AP or CP. In patients with CP, there was a direct association of HTN with glucose levels or BMI, and in patients with PC — HTN with BMI or age.
Helical spin textures with marked spin polarizations of topological surface states have been unveiled for the first time by state-of-the-art spin- and angle-resolved photoemission spectroscopy for two promising topological insulators, Bi(2)Te(2)Se and Bi(2)Se(2)Te. Their highly spin-polarized natures are found to be persistent across the Dirac point in both compounds. This novel finding paves a pathway to extending the utilization of topological surface states of these compounds for future spintronic applications.
Actional sentences describe certain ways in which the subjects affect the objects while the object's position in space does not change. The plane of content is the actional proposition, which contains the three necessary components, namely the subject, the object, and the predicate; the plane of expression is the model of the elementary simple sentence where the object position is prototypically expressed by a name in accusative. In the Khanty and Nenets languages, the actional elementary simple sentences tend to express the same types of relations but differ in their potential for paradigmatic variation. In Tundra Nenets, the communicative variants are related to variation in the choice of accusative, nominative, dative, or instrumental cases in order to express the thematic or rhematic objects and instruments/addressees. In the Kazym dialect of the Khanty language, the accusative form is only used in the system of pronominal declination; in the object position, nouns in nominative case are used. Therefore, to express the thematic-rhematic articulation, verb categories of conjugation (opposition of subject and object conjugation types) are used, as well as genus, because the case system is contracted. In the Nenets language, the communicative paradigm is related to the variation in name categories, whereas in Khanty, it is related to variation in verb categories.
Experimental data on the evolution of controlled stationary and travelling disturbances in a 3D supersonic boundary layer, over a 45° swept-wing at Mach number 2.0, is presented. Travelling artificial disturbances were introduced in the boundary layer by periodical glow discharge, at a frequency of 20 kHz. Stationary disturbances were acquired by setting the roughness elements on the surface of the model. Spatial-temporal and spectral-wave characteristics of the wave train at the frequency 20 kHz, in the linear region of development, were obtained. It was found that the periodic modulation of mean flow can lead to the stabilization of unstable travelling disturbances in the supersonic boundary layer of a swept wing. These experiments have investigated the viability of using roughness elements to control laminar-turbulent transition.
The endothelial NO synthase (eNOS) and vascular endothelial growth factor (VEGF) imbalance and the polymorphism of these genes may be the predisposition for diabetic retinopathy (DR) development and progression. The aim: to analyze VEGF (rs699947 and rs3025039) and eNOS (rs2070744) genes polymorphism and their combinations in patients with type 2 diabetes mellitus (DM2) with and without initial non-proliferative DR. Materials and methods. The study included 200 patients with type 2 diabetes (155 women and 45 men, age – 43–70 years): 111 people without and 89 people with DR. The polymorphism of the regulatory regions of VEGF (rs699947 and rs3025039) and eNOS (rs2070744) genes was studied using restriction fragment length polymorphism analysis and TaqMan Real-Time PCR by. Statistical processing was carried out using the software packages Statistica 10.0, SPSS Statistics 23 and the package of original programs for volumetric processing of bioinformation. Results. The VEGF-2578 heterozygosity and two complex genotypes – VEGF-2578CA:VEGF+936CC and NOS3-786CT:VEGF-2578CA:VEGF+936CC – signifi cantly decreased in patients with DR. The predisposition to early DR development to minor genotype of eNOS gene in the NOS3-786CC:VEGF+936CT complex and signifi cantly decreased the homozygous wild-type eNOS genotype in DM2 patients with ophthalmopathology were shown. NOS3-86TT:VEGF2578AA genotype signifi cantly decreased in group with retinopathy developing and the glycated hemoglobin high level. Conclusion. Along with the clinical risk factors for the development of DR in DM2, the genetic polymorphism of the regulatory regions of the genes analyzed by us has a signifi cant weight. When analyzing potential genetic markers, it is important to consider possible joint epistatic/hypostatic effects. The complex analysis of polymorphic gene can help early prognosis of the DR development.
A research team from ICT SB RAS is actively developing a system to control a pilot plant for processing organic waste automatically. The pilot plant can produce thermal energy and energy carriers (solid products, e.g. bio-coal, liquid products, e.g. bio-oil, and gaseous products, i.e. synthesis gas), for example, from biomass with different chemical composition and physical properties. The equipment can process "complex" types of waste characterized mainly by high moisture and high ash content. During tests of the pilot plant, the complexity of stabilizing the parameters of technological processes and ensuring the stability and reliability of operation of the equipment of the complex as a whole were identified. This is especially important when implementing high-temperature modes of biomass processing. In order to primarily solve these most important tasks, an automatic control system of the plant is being created. When a system for automatic control of technological parameters of the gas-air path of the pilot-industrial plant is developed, a mathematical model that describes the dynamic characteristics of the gas and air paths under various throughput rates of the plant was used. When determining mathematical models, a two-way relationship between the gas path and air path was identified (interchannel connections). When technologically complex real objects of control are being automated, in the inaccuracy of a priori information about the object, when the system operates in various uncertain external and internal situations, disturbing influences, a robust control method should be used. PID controllers were selected as corrective devices for stabilizing the technological parameters that characterize the operation mode of the gas-air path of the plant including pressure in the lower part and rarefaction in the upper part of the combustion chamber. The most appropriate method for determining the PID controller settings has been elected. Synthesis and simulation of the operation of the controllers of the pressure in the lower part and rarefaction in the upper part of the combustion chamber are performed. Basing on the results of mathematical modeling, the efficiency of the controllers of the pressure in the lower part and the rarefaction in the upper part of the combustion chamber for various loads of the plant has been shown, and their stability reserves by amplitude and phase are determined. The results of mathematical modeling of the stabilization contours of the technological parameters of the gas-air path of the plant are presented for two cases: without inter-channel connections and without the account of these connections. A simulation of the joint operation of the control circuits of the gas-air path of the plant is performed. Compensators for adjacent (interchannel) connections of the gas and air paths of the plant have been developed. The advantage of the proposed automation schemes is shown.
Neuronal tracing is a modern technology that is based on the expression of fluorescent proteins under the control of cell type-specific promoters. However, random genomic integration of the reporter construct often leads to incorrect spatial and temporal expression of the marker protein. Targeted integration (or knock-in) of the reporter coding sequence is supposed to provide better expression control by exploiting endogenous regulatory elements. Here we describe the generation of two fluorescent reporter systems: EGFP under pan-neural marker class III β-tubulin ( Tubb3 ) promoter and mEos2 under serotonergic neuron specific tryptophan hydroxylase 2 ( Tph2 ) promoter. Differentiation of Tubb3-EGFP ES cells into neurons revealed that though Tubb3-positive cells express EGFP, its expression level is not sufficient for the neuronal tracing by routine fluorescent microscopy. Similarly, the expression levels of mEos2-TPH2 in differentiated ES cells was very low and could be detected only on mRNA level using PCR-based methods. Our data shows that the use of endogenous regulatory elements to control transgene expression is not always beneficial compared to random genomic integration.
Federal law no. 42-FZ of March 8, 2015 “On Amending Part One of the Civil Code of the Russian Federation”, for the first time, an attempt was made to consolidate the rules on the application of general provisions on obligations in article 307.1 of the Civil code of the Russian Federation to contractual and non-contractual legal relations. to some types of protective obligations. The author of the article does not consider the novel of the Civil code of the Russian Federation a successful regulation of protective obligations. Measures are proposed to improve the norms of the Civil code of the Russian Federation on protection obligations.
The features of the paramagnetic properties of lanthanide (Ln) containing complexes with crown ethers, pivaloyltrifluoracetonato, and EDTA have been studied by 1 H and 19 F NMR techniques. These complexes are of interest due to the prospect of using some of them as sensors for biology and medicine.

The temperature dependencies of the lanthanide-induced shifts revealed that Ln complexes might have practical importance for 1 H and 19 F NMR temperature control in solutions.

It was shown in vitro (using NMR spectrometers and MRI scanners) that these complexes can serve as special NMR thermo-sensitive contrast reagents.
The problem is considered on a flow of a viscous liquid in the presence of solid bodies – two walls and a free plate the boundary of which is permeable for a liquid – under oscillatory influences. The formulation of the problem includes the equation of the plate motion, the equations of Navier–Stokes and a continuity and conditions at solid boundaries of the liquid. The new hydro-mechanical effect is revealed which consists in that in the absence of a predominant direction in space free parts of the hydro-mechanical system at a background of oscillations perform a unidirectional, steady motion.
The $ {D^ + } \to d\bar d{e^ + }v \to a_0^0\left( {980} \right){e^ + }\nu {\rm{ }} \to {\pi ^0}\eta {e^ + }\nu $ and $ {D^0} \to d\bar u{e^ + }\nu {\rm{ }} \to a_0^ - \left( {980} \right){e^ + }\nu {\rm{ }} \to {\pi ^ - }\eta {e^ + }\nu $ decays (with the charge conjugated ones) are the direct probe of the constituent two-quark components in the $ a_0^ \pm (980) $ and $ a_0^0(980) $ wave functions. Recent BESIII experiment is the first step in experimental study of these decays.

We suggest adequate formulas for the data analysis and present a variant of ηπ invariant mass distribution

when a 0 (980) has no constituent two-quark component at all.
The rapid development of renewable energy sources observed in recent years however has a number of limitations for different regions limited by non-price factors such as corruption and opacity of supporting institutions, lack the necessary technology to integrate renewable into the grid, lobbying and support of the interests of the owners of traditional energy sources and others.

The article attempts to analyse the factors that affect the consumption of renewable energy sources in three groups of countries

pointing to the greater importance of such indicators as the share of R & d in GDP, the availability of traditional energy resources, oil prices, transparency of institutions for some countries and their lesser importance for others.
Neutral beam (NB) injector for the TCV tokamak has been designed to produce a deuterium beam with energy 30 keV, equivalent current up to 50 A, and pulse duration 2 s. The injector operation is accompanied by generation of fast neutrons produced in deuterium-deuterium collisions via a nuclear fusion reaction D(D,n)3He. Main sources of the neutrons are a beam neutralizer and a deuterium-saturated surface of beam dump. Measurements of the neutron yields from the both sources were produced on the prototype of TCV injector in the Budker Institute of Nuclear Physics. Neutron yields from neutralizer and beam dump are equal to 9.5x108 s−1 and 2.3 × 109 s−1 for the nominal parameters of the injector (30 kV, 50 A).
Mutation tl x was induced in pea by gamma-irradiation in the homeotic gene Tl , responsible for transformation of the upper leaflets into tendrils. Heterozygotes tl x / Tl + possess ‘flat tendrils’ having narrow rudimentary leaf blades. By 15 generations of selfing the line Delta was established, in which closely linked loci Tl and His1 were maintained heterozygous, His1 encoding the most abundant histone H1 subtype. The heterozygous chromosome region was flanked by several recessive markers. The genotype of line Delta with respect to loci His1 and Tl was: tl x His1 2 / Tl + His1 1 . There were derived two sublines, Delta-s and Delta-f, homozygous for each of the His1 alleles but heterozygous for the Tl and flanking markers. The three lines were compared for a number of quantitative traits, including parameters of flat tendrils reflecting the expression of the gene Tl in heterozygote, and for recombination rate within the heterozygous segment. The line Delta-s exceeded Delta-f in terms of the level of the first inflorescence, length of the internode 8–9, number of pods on the main stem and mean seed mass, but was inferior regarding the mean number of seeds per pod. The flat tendrils were wider in the Delta-s as compared with the Delta-f line ; the difference was highly significant and exceeded 15% at node 17. Recombination rate between the flanking markers also showed significant differences, being highest in the Delta-f and lowest in the Delta line. We do not exclude the possibility that the observed differences in the quantitative traits are caused by the substitution of alleles of the histone H1 gene. The effects of such substitution appeared to be especially strong for expression of the homeotic gene Tl .
The gases are adsorbed in the pores of structured mesoporous silica matrices known as HYPSOs (HYper Polarizing SOlids) that have paramagnetic polarizing agents covalently bound to the surface of the mesopores.

We report a simple and general method for the hyperpolarization of condensed gases by dynamic nuclear polarization (DNP). DNP is performed at low temperatures and moderate magnetic fields (T = 1.2 K and B0 = 6.7 T). Frequency-modulated microwave irradiation is applied close to the electron spin resonance frequency (f = 188.3 GHz), and the electron spin polarization of the polarizing agents of HYPSO is transferred to the nuclear spins of the frozen gas.

A proton polarization as high as P(1H) = 70% can be obtained, which can be subsequently transferred to 13C in natural abundance by cross-polarization, yielding up to P(13C) = 27% for ethylene.
We study the plasma-vacuum interface problem in relativistic magnetohydrodynamics for the case when the plasma density does not go to zero continuously, but jumps. In the vacuum region we consider the Maxwell equations for electric and magnetic fields.

By using a suitable secondary symmetrization of the vacuum Maxwell equations, we find a sufficient condition that precludes violent instabilities. Under this condition we derive an energy a priori estimate in the anisotropic weighted Sobolev space $H^1_*$ for the variable coefficients linearized problem for nonplanar plasma-vacuum interfaces.

We show that a sufficiently large vacuum electric field can make the planar interface violently unstable.
The review of the seismicity in Altai and Sayan region for 2014 is presented. The stationary network of seismic stations included 48 stations. Compared to 2013, seven new seismic stations were added in the region. Additionally 3 local temporary networks including 39 temporary seismic stations operated in the region.

8828 earthquakes were recorded with the total seismic energy of 4.6•1012 J.

A brief description of the seismicity in the Chui-Kurai zone of the Altai Mountains is given.