Hengzongshu/ArticleAgent huggingface dataset:
Annual needles of larch and cedar were sampled in the tundra zone of the Arctic part of Western Siberia in order to determine 7 Be, 210 Pb and 137 Cs specific activities.

Higher concentrations of 137 Cs in the needles of cedar relative to the needles of larch can be associated with a clear difference in the properties of accumulation and translocation of caesium among these species.

Higher concentrations of 7 Be and 210 Pb in the needles of larch relative to cedar needles and close isotopic ratios ( 7 Be/ 210 Pb) are probably due to more efficient aerosol deposition on vegetative canopies of larch.
Two-phase Cryogenic Avalanche Detectors (CRADs) with GEM and THGEM multipliers have become an emerging potential technique for charge recording in rare-event experiments. In this work we present the performance of two-phase CRADs operated in Ar and Ar+N2. Detectors with sensitive area of 10 × 10 cm2, reaching a litre-scale active volume, yielded gains of the order of 1000 with a double-THGEM multiplier. Higher gains, of about 5000, have been attained in two-phase Ar CRADs with a hybrid triple-stage multiplier, comprising of a double-THGEM followed by a GEM. The performance of two-phase CRADs in Ar doped with N2 (0.1–0.6%) yielded faster signals and similar gains compared to the operation in two-phase Ar. The applicability to rare-event experiments is discussed.
The blood realizes the transport of substances, which are necessary for livelihoods, throughout the body. The assumption about the relationship genotype and structure of vasculature (in particular of brain) is natural. In the paper we consider models of vessel net for two genetic lines of laboratory mice.

Vascular net obtained as a result of preprocessing MRI data. MRI scanning is realized using the method of variation of slope of scanning plane, i.e. by several sets of parallel planes specified by different normal vectors. The following special processing allowed to construct models of vessel nets without fragmentation.

The purpose of the work is to compare the vascular network models of two different genetic lines of laboratory mice.
Multiple sclerosis is a chronic immune-mediated disease of the central nervous system with disseminated foci of demyelination and progressive neurodegeneration; it is the most common demyelinating disease and the leading cause of disability of neurological patients of a young age, characterized by a wave-like course with alternating periods of remission and relapse. Currently, there is a discussion about the participation of vascular changes in the formation of neurological disorders and about the possibility of correction of therapeutic approaches in connection with the revealed microcirculatory disorders. Perfusion MRI allows you to evaluate hemodynamics at the capillary level in vivo.

To evaluate perfusion changes in foci of demyelination in multiple sclerosis using the method of dynamic susceptibility contrast (DSC). The MR study was carried out on a super-high-angle MR-scanner «Ingenia» («Philips») 3 Tesla. The study included 30 healthy volunteers and 80 patients with demyelinating disease from 18 to 48 years old (average age was 34,6±8,02 years). Quantitative and qualitative assessment of perfusion indices in foci of demyelination was carried out.

In the active foci of demyelination, an increase in the speed and volume of cerebral blood flow is noted, the most pronounced changes in patients with clinically isolated syndrome. Inactive foci, marked hypoperfusion is noted. Evaluation of cerebral perfusion allows a new look at the role of the vascular component in the formation of focal inflammatory changes in the brain in multiple sclerosis, which can determine a new direction of pathogenetic treatment. Perfusion data complements routine MRI and provides a comprehensive assessment of the neurovascular system.
High-energy photons and other particles carrying nonzero orbital angular momentum (OAM) emerge as a new tool in high-energy physics. Recently, it was suggested to generate high-energy photons with nonzero OAM (twisted photons) by the Compton backscattering of twisted optical photons on relativistic electron beams. Twisted electrons in the intermediate energy range have also been demonstrated experimentally; twisted protons and other particles can, in principle, be created in a similar way. Collisions of energetic twisted states can offer a new look at particle properties and interactions. A theoretical description of twisted particle scattering developed previously treated them as pure Bessel states and ran into difficulty when describing the OAM of the final twisted particle at nonzero scattering angles. Here we develop further this formalism by incorporating two additional important features. First, we treat the initial OAM state as a wave packet of a finite transverse size rather than a pure Bessel state. This realistic assumption allows us to resolve the existing controversy between two theoretical analyses for nonforward scattering. Second, we describe the final twisted particle in terms of the orbital helicity: the OAM projection on its average direction of propagation rather than on the fixed reaction axis. Using this formalism, we determine to what extent the twisted state is transferred from the initial to final OAM particle in a generic scattering kinematics. As a particular application, we prove that in the Compton backscattering the orbital helicity of the final photon stays close to the OAM projection of the initial photon.
The peculiarities of spin effects in photoinduced electron transfer (ET) in diastereomers of donor-acceptor dyads are considered in order to study the influence of chirality on reactivity.

The article analyzes the experimental values of spin selectivity based on CIDNP calculations and molecular dynamic modeling data in order to reveal the effect of optical configuration on the structure and reactivity of diastereomers.

In this way, we succeeded in tracing the differences in dyads with L- and D-tryptophan as an electron donor. Since the replacement of L-amino acid with D-analog in specific proteins is believed to be the cause of Alzheimer's and Parkinson's diseases, spin effects and molecular dynamic simulation in model dyads can be a useful tool for investigating the nature of this phenomenon.
Regular collecting of biological samples from wild birds was carried out in 2016 in the south of Western Siberia.

Isolation of avian influenza virus strains from birds’ cloacal swabs was performed using three passages in embryonated chicken eggs. Hemagglutination assay was used to detect viruses in the allantoic fluid. Type and subtype of influenza viruses were identified using reverse transcription PCR (RT‐PCR).

This is the first time the avian influenza virus H6N8 subtype has been isolated in Russia. Phylogenetic analysis revealed that hemagglutinin (HA) and neuraminidase (NA) segments of A/gadwall/Chany/97/2016(H6N8) strain genome belonged to the Eurasian lineages of avian influenza viruses. Phylogenetic analysis showed that the HA sequence of the strain was closely related to the strain isolated from a duck in Bangladesh in 2015 (A/duck/Bangladesh/25767/2015(H6N1). Avian influenza viruses subtype H6N8 have the ability to circulate among wild waterfowl and poultry, increasing the chance of reassortment and transmission of H6 virus strains among birds. For this reason, it is of crucial importance to strengthen surveillance for avian influenza H6 subtype among wild birds in the south of Western Siberia.
It is shown that F(R)-modified gravitational theories lead to curvature oscillations in astrophysical systems with rising energy density. The frequency and the amplitude of such oscillations could be very high and would lead to noticeable production of energetic cosmic ray particles.
The interaction between the dark/mirror sector and the ordinary sector is considered, where the two sectors interact with each other by sharing the same QCD axion field.

This feature makes the mixing between ordinary and dark/mirror photons in ordinary and dark electromagnetic fields possible. Perturbative solutions of the equations of motion describing the evolution of fields in ordinary and dark external magnetic fields are found. User-friendly quantities such as transition probability rates and Stokes parameters are derived.

Possible astrophysical and cosmological applications of this model are suggested.
NSUCRYPTO (Non-Stop University Crypto) международная олимпиада по криптографии, которая в 2019 г. проводилась в шестой раз.

В программный комитет олимпиады входят специалисты из Бельгии
The data acquisition (DAQ) system of the SND detector successfully operated during four data-taking seasons (2010–2013) at the e+e− collider VEPP-2000. Currently the collider is shut down for planned reconstruction, which is expected to increase the VEPP-2000 luminosity and data flow from the SND detector electronics by up to 10 times.
RNA-binding proteins (RBPs) regulate RNA metabolism, from synthesis to decay. When bound to RNA, RBPs act as guardians of the genome integrity at different levels, from DNA damage prevention to the post-transcriptional regulation of gene expression. Recently, RBPs have been shown to participate in DNA repair. This fact is of special interest as DNA repair pathways do not generally involve RNA. DNA damage in higher organisms triggers the formation of the RNA-like polymer - poly(ADP-ribose) (PAR). Nucleic acid-like properties allow PAR to recruit DNA- and RNA-binding proteins to the site of DNA damage. It is suggested that poly(ADP-ribose) and RBPs not only modulate the activities of DNA repair factors, but that they also play an important role in the formation of transient repairosome complexes in the nucleus. Cytoplasmic biomolecules are subjected to similar sorting during the formation of RNA assemblages by functionally related mRNAs and promiscuous RBPs. The Y-box-binding protein 1 (YB-1) is the major component of cytoplasmic RNA granules. Although YB-1 is a classic RNA-binding protein, it is now regarded as a non-canonical factor of DNA repair.
Reconstruction of vascular net of small laboratory animals from MRI data is associated with some problems. This paper proposes a method of MRI data processing which allows to eliminate the fragmentation of reconstructed vascular net. Problem of vessels fragmentation occurs in the case when vessels are parallel to the scanning plane. Our approach is based on multiple scanning, object under consideration is probed by several sets of parallel planes. The algorithm is applied to real MRI data of small laboratory animals and shows good results.
The complex spin order of hyperpolarized multispin systems giving rise to anomalous NMR spectral patterns that vary with the RF excitation angle is analyzed by decomposing its nutation behavior in a superposition of Fourier harmonics. The product operator formalism is applied to calculating the spectral contributions of the various mutual alignments of scalar coupled spins. Two cases are treated, namely systems exhibiting only differences in population of their spin states and systems showing in addition zero-quantum coherences between states, a situation often seen at hyperpolarization. After deriving the general solution a number of representative examples are discussed in detail. The theoretical treatment is applied to analyzing the spin order observed in a hyperpolarized two-spin system that is prepared in the singlet state by para-hydrogen induced polarization.
We report a study of the decays $B\ensuremath{\rightarrow}{D}_{s1}(2536{)}^{+}{\overline{D}}^{(*)}$, where ${\overline{D}}^{(*)}$ is ${\overline{D}}^{0}$, ${D}^{\ensuremath{-}}$ or ${D}^{*\ensuremath{-}}$, using a sample of $657\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.

The branching fractions of the decays ${B}^{+}\ensuremath{\rightarrow}{D}_{s1}(2536{)}^{+}{\overline{D}}^{0}$, ${B}^{0}\ensuremath{\rightarrow}{D}_{s1}(2536{)}^{+}{D}^{\ensuremath{-}}$ and ${B}^{0}\ensuremath{\rightarrow}{D}_{s1}(2536{)}^{+}{D}^{*\ensuremath{-}}$ multiplied by that of ${D}_{s1}(2536{)}^{+}\ensuremath{\rightarrow}({D}^{*0}{K}^{+}+{D}^{*+}{K}^{0})$ are found to be $(3.97\ifmmode\pm\else\textpm\fi{}0.85\ifmmode\pm\else\textpm\fi{}0.56)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, $(2.75\ifmmode\pm\else\textpm\fi{}0.62\ifmmode\pm\else\textpm\fi{}0.36)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and $(5.01\ifmmode\pm\else\textpm\fi{}1.21\ifmmode\pm\else\textpm\fi{}0.70)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, respectively.

The ratio $\mathcal{B}({D}_{s1}\ensuremath{\rightarrow}{D}^{*0}{K}^{+})/\mathcal{B}({D}_{s1}\ensuremath{\rightarrow}{D}^{*+}{K}^{0})$ is measured to be $0.88\ifmmode\pm\else\textpm\fi{}0.24\ifmmode\pm\else\textpm\fi{}0.08$.
the features of the capital structure of oil and gas companies are considered, a comparative analysis of own and borrowed capital of oil and gas companies structures is carried out
Higgs boson properties are studied in the four-lepton decay channel (where lepton = e , μ) using 139 fb⁻¹ of proton–proton collision data recorded at √s = 13 TeV by the ATLAS experiment at the Large Hadron Collider.

The inclusive cross-section times branching ratio for H → ZZ* decay is measured to be 1.34 ± 0.12 pb for a Higgs boson with absolute rapidity below 2.5. Cross-sections times branching ratio are measured for the main Higgs boson production modes in several exclusive phase-space regions. The measurements are interpreted in terms of coupling modifiers and of the tensor structure of Higgs boson interactions using an effective field theory approach.

The measurement is in good agreement with the Standard Model prediction of 1.33 ± 0.08 pb. Exclusion limits are set on the CP-even and CP-odd 'beyond the Standard Model' couplings of the Higgs boson to vector bosons, gluons and top quarks.
Identifying liquids in chemical technologies and in the oil industry is an actual problem. Such identifications can be made using individual characteristics of thermocapillary flows and deformations in the horizontal layers of the investigated liquids.

Numerical algorithms and calculating code have been developed for solving inverse problems for identifying properties of liquid. As additional information for inverse problem a function of thermocapillary response is used. The algorithm for solving inverse problem is based on solving problem of minimizing the residual function. The minimum is obtained numerically by the Newton's method. Numerical calculations have been made for silicone oil. Thermocapillary responses have been calculated for different values of the coefficients. The developed algorithms have been tested on synthetic data, which have been obtained from the solution of direct problems.

The developed algorithms have shown a good convergence and efficiency.
It was recently proposed [1] that the model with a fraction of decaying cold dark matter is able to reconcile measurements in high redshift (CMB) and low redshift (probes of cluster abundance and the Hubble constant). We check this statement employing the full likelihood of CMB Planck data. We find that the lensing effect calculated from anisotropy spectra measured by Planck imposes the strong constraint on the fraction of unstable dark matter as F < 8% (2σ). However, combining the CMB data with conflicting measurements in low redshift we obtain that the model with F ≈ 2 − 5% improves the goodness-of-fit by 1.5 − 2σ depending on As and τ priors in comparison with the concordance ΛCDM model.
Chromosome level assemblies are accumulating in various taxonomic groups including mosquitoes. However, even in the few reference-quality mosquito assemblies, a significant portion of the heterochromatic regions including telomeres remain unresolved. Here we produce a de novo assembly of the New World malaria mosquito, Anopheles albimanus by integrating Oxford Nanopore sequencing, Illumina, Hi-C and optical mapping. This 172.6 Mbps female assembly, which we call AalbS3, is obtained by scaffolding polished large contigs (contig N50 = 13.7 Mbps) into three chromosomes. All chromosome arms end with telomeric repeats, which is the first in mosquito assemblies and represents a significant step toward the completion of a genome assembly. These telomeres consist of tandem repeats of a novel 30-32 bp Telomeric Repeat Unit (TRU) and are confirmed by analyzing the termini of long reads and through both chromosomal in situ hybridization and a Bal31 sensitivity assay. The AalbS3 assembly included previously uncharacterized centromeric and rDNA clusters and more than doubled the content of transposable elements and other repetitive sequences. This telomere-to-telomere assembly, although still containing gaps, represents a significant step toward resolving biologically important but previously hidden genomic components. The comparison of different scaffolding methods will also inform future efforts to obtain reference-quality genomes for other mosquito species.
We report a study of the decay D^{0}→K_{S}^{0}K_{S}^{0} using 921 fb^{-1} of data collected at or near the ϒ(4S) and ϒ(5S) resonances with the Belle detector at the KEKB asymmetric energy e^{+}e^{-} collider.

The measured time-integrated CP asymmetry is A_{CP}(D^{0}→K_{S}^{0}K_{S}^{0})=(-0.02±1.53±0.02±0.17)%, and the branching fraction is B(D^{0}→K_{S}^{0}K_{S}^{0})=(1.321±0.023±0.036±0.044)×10^{-4}, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D^{0}→K_{S}^{0}π^{0}).

These results are significantly more precise than previous measurements available for this mode. The A_{CP} measurement is consistent with the standard model expectation.
Background.The end-use of the bread wheat grain depends on the endosperm properties determined by the alleles of the Pinaand Pinbgenes at the Halocus on chromosome 5D. The mealy (soft) endosperm is generated by the biosynthesis of puroindolines – complete proteins encoded by these genes. When milled, such grain breaks down into small starch granules covered with proteins. Mutations that disrupt the synthesis or structure of puroindolines determine the hardness and vitreousness of the grain. Earlier, we discovered a new locus for grain softness, Ha-Sp, introgressed from the diploid species Aegilops speltoidesTausch, which also determines the formation of the soft endosperm structure. By combining two active loci in one genotype, we produced a supersoft grain line (SSL).

Materials and methods.The F3–F8 hybrids from crosses of the soft-grain spring cultivars ‘Golubka’ and ‘Lutescens 62’, carriers of the Halocus, with the introgressive line 84/98w, carrier of the Ha-Splocus, were used in the work. Grain from three field seasons was studied according to milling parameters and physical properties of flour and dough.

Results.At the early stages of selection (F3:4), the families with milling parameters typical of bread wheat were identified, as well as supersoft-grain families with a small flour particle size (9–10 μm) and low endosperm vitreousness (29–49%). Targeted selection made it possible to obtain lines similar to the SSL line in terms of milling performance and flour strength. Conclusion.For the first time, a set of supersoft-grain lines with special properties of grain and flour was obtained on the genetic basis of three spring cultivars. They may be in demand for a wide range of end-uses, including both food and nonfood production purposes.
ABSTRACT The repair processes regulation including base excision repair (BER) is implemented by a cellular signal PARylation catalysed by PARP1 and PARP2. Despite intensive studies, it is far from clear how BER is regulated by PARPs and how the roles are distributed between the PARPs. Here, we investigated the effects of PARP1, PARP2 and PARylation on activities of the main BER enzymes (APE1, Polβ and LigIIIα) in combination with XRCC1 in the nucleosomal context. We constructed nucleosomes with midward- or outward-oriented damage. It was concluded that in most cases, the presence of PARP1 leads to the suppression of the activities of APE1, Polβ, and to a lesser extent LigIIIα. PARylation by PARP1 attenuated this effect to various degrees. PARP2 had an influence predominantly on the last stage of BER: DNA sealing. Nonetheless, PARylation by PARP2 led to Polβ inhibition and to significant stimulation of LigIIIα activities in a NAD + -dependent manner.
The Silk Road was an important trade route that channeled trade goods, people, plants, animals, and ideas across the continental interior of Eurasia, fueling biotic exchange and key social developments across the Old World. Nestled between the Pamir and Alay ranges at a baseline elevation of nearly 3000m, Kyrgyzstan's high Alay Valley forms a wide geographic corridor that comprised one of the primary channels of the ancient Silk Road. Recent archaeological survey reveals a millennia-long history of pastoral occupation of Alay from the early Bronze Age through the Medieval period, and a stratified Holocene sequence at the site of Chegirtke Cave.

Faunal remains were recovered from test excavations as well as surface collection of material from recent marmot activity. Although recovered specimens were highly fragmented and mostly unidentifiable using traditional zooarchaeological methods, species identification via collagen mass fingerprinting (ZooMS) coupled with sex and first-generation hybrid identification through ancient DNA enabled preliminary characterization of the animal economy of Alay herders.

Our new results indicate primary reliance on sheep at Chegirtke Cave (ca. 2200 BCE), with cattle and goat also present. The discovery of a large grinding stone at a spatially associated Bronze or Iron Age habitation structure suggests a mixed agropastoral economic strategy, rather than a unique reliance on domestic animals. Radiocarbon-dated faunal assemblages from habitation structures at nearby localities in the Alay Valley demonstrate the presence of domestic horse, as well as Bactrian camel during later periods. The current study reveals that agropastoral occupation of the high-mountain Alay corridor started millennia before the formal establishment of the Silk Road, and posits that ZooMS, when paired with radiocarbon dates and ancient DNA, is a powerful and cost-effective tool for investigating shifts in the use of animal domesticates in early pastoral economies.
We performed direct numerical simulations of the annular turbulent jet flow for the Reynolds number based on the bulk velocity inside the nozzle and its outer diameter Re = 8900 with three different values of the inner-to-outer diameter ratio a = d / D = 0.3, 0.5, 0.7.

The size of the reversal flow region, the fluctuation level and mixing rate increase with the increase of the diameter ratio. For all the cases of geometry parameters the symmetry breaking phenomenon was detected. The degree of asymmetry increases with the increase of the diameter ratio resulting in the displacement of the global stagnation points form the axis of symmetry and the deflection of the averaged streamlines from the jet axis.