[Organization of children's otorhinolaryngological care in conditions of biological risks: international experience].

The COVID-19 pandemic has spurred the introduction of new devices and technologies into the organization of otorhinolaryngological care, the development of safety measures and clinical work protocols in order to increase the safety of doctors and patients. Virtual outpatient clinics have been integrated into the pediatric and basic outpatient services, the potential of which for pediatric otolaryngology is considered quite significant. In otorhinolaryngological practice, the transition to the expanded use of telemedicine technologies (individual gadgets for examining ENT patients, including a direct access otoscope connected to an otolaryngologist's computer) was especially significant.

[Features of the appeal for pediatric otorhinolaryngological care in conditions of increased biological risks].

The combined effect of close contact between child patients and otorhinolaryngologists, as well as the practice of aerosol-generating procedures, justify the need to take prompt organizational measures to reduce risks in the provision of pediatric otorhinolaryngological care in conditions of increased biological risks. In the pediatric ENT community, these adaptations have resulted in: judicious distribution of care to treat the most severe conditions, minimizing the risk of long-term consequences, ensuring the safety of child patients and healthcare workers through better communication methods, changing procedural precautions, the rapid introduction of telemedicine for diagnosis and treatment of patients, as well as the development of protective protocols to limit exposure to aerosol-generating procedures or manipulations to reduce the risk of exposure to a high viral load.

Findings of new phytoplankton species in the Barents Sea as a consequence of global climate changes.

Over the past few decades, the Earth's climate has been characterized by a stable increase in temperature, which in many regions leads to a change in the composition of flora and fauna. A striking manifestation of this process is the appearance in ecological communities of new, uncharacteristic for them, species of animals and plants. One of the most productive and at the same time the most vulnerable in this respect are the marine ecosystems of the Arctic.

Complete mitochondrial genomes of Gritzenko's charr Salvelinus gritzenkoi and Miyabe charr Salvelinus malma miyabei and their interpretation regarding intraspecific taxonomy.

Background: Salvelinus is one the most species-rich genera of salmonids (Salmoniformes: Salmonidae), and mitogenomic sequence data have served as a rich source of information for resolving fish phylogenies and identifying new charr species. However, current reference databases contain limited mitochondrial genome information on narrow-ranged, endemic charrs with disputable origin and systematic status. More comprehensive mitochondrial genome-based phylogenetics will help enhance understanding of the relationship and delineate charr species.

Search for Dark-Matter-Nucleon Interactions via Migdal Effect with DarkSide-50.

Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-GeV/c^{2} mass dark matter. We present new constraints for sub-GeV/c^{2} dark matter using the dual-phase liquid argon time projection chamber of the DarkSide-50 experiment with an exposure of (12 306±184)  kg d.

Culturally adapted pulmonary rehabilitation for adults living with post-tuberculosis lung disease in Kyrgyzstan: protocol for a randomised controlled trial with blinded outcome measures.

Introduction: Pulmonary rehabilitation (PR) is a programme of individually prescribed physical exercise, education and self-management activities. PR is recommended in international guidelines for managing chronic obstructive pulmonary disease (COPD) and other chronic respiratory diseases. PR is still under-recognised in tuberculosis (TB) guidelines and PR is not available in many low and middle-income countries and for people with post-TB lung disease (PTBLD).

Complete mitochondrial genomes of the charr (Salmoniformes: Salmonidae) from Arctic Canada.

The complete mitochondrial genomes were sequenced in two individuals of charr from Arctic Canada. The genome sequences were 16,652 bp in length; the genome organization and GC content (45.6%) are consistent with those of charr mitochondrial genomes published previously.

Complete mitochondrial genomes of endemic charr of the genus from Lake Nachikinskoe (Kamchatka, Russia).

The complete mitochondrial genomes were sequenced from three individuals of the endemic charr sp. 4 [ from Lake Nachikinskoe (Kamchatka, Russia). The complete mitochondrial genomes were 16,654 bp in size; the genome organization and GC content (45.

Seasonal calibration of the end-cretaceous Chicxulub impact event.

The end-Cretaceous Chicxulub impact triggered Earth's last mass-extinction, extinguishing ~ 75% of species diversity and facilitating a global ecological shift to mammal-dominated biomes. Temporal details of the impact event on a fine scale (hour-to-day), important to understanding the early trajectory of mass-extinction, have largely eluded previous studies. This study employs histological and histo-isotopic analyses of fossil fish that were coeval with a unique impact-triggered mass-death assemblage from the Cretaceous-Paleogene (KPg) boundary in North Dakota (USA).

Climate and the latitudinal limits of subtropical reef development.

Climate plays a central role in coral-reef development, especially in marginal environments. The high-latitude reefs of southeast Florida are currently non-accreting, relict systems with low coral cover. This region also did not support the extensive Late Pleistocene reef development observed in many other locations around the world; however, there is evidence of significant reef building in southeast Florida during the Holocene.

Complete mitochondrial genomes of the Arctic charr Linnaeus (Salmoniformes: Salmonidae).

The complete mitochondrial genomes were sequenced in three individuals of Arctic charr . The genome sequences were 16,655 and 16,657 bp in length, and the gene arrangement, composition, and size are very similar to the charr genomes published previously. The difference between the three genomes studied is low, 0.

Complete mitochondrial genome and phylogenetic position of the Levanidov's charr Chereshnev, Skopetz et Gudkov, 1989 (Salmoniformes, Salmonidae).

The complete mitochondrial genome was sequenced in Levanidov's charr . The genome sequences are 16,624 bp, and the gene arrangement, composition, and size are similar to the charr genomes. The level of divergence between and charr belonging to the genus was in the range from 4.

First report of three complete mitochondrial genomes of the long-finned charr Chereshnev et Skopetz, 1990 (Salmoniformes: Salmonidae) with phylogenetic consideration.

The complete mitochondrial genome was sequenced in three individuals of long-finned charr from Lake El'gygytgyn (Chukotka Peninsula, Russia). The genome sequences are 16,655 bp in size and the gene arrangement, composition, and size are similar to the charr genomes published previously. The difference between the three genomes studied is low, 0.

Complete mitochondrial genome and phylogenetic position of the Taranetz charr Kaganovsky, 1955 (Salmoniformes: Salmonidae).

The complete mitochondrial genome was sequenced in two individuals of Taranetz charr . The genome sequences are 16,654  bp in size, and the gene arrangement, composition, and size are very similar to the charr genomes published previously. The difference between the two genomes studied is low, 0.

A seismically induced onshore surge deposit at the KPg boundary, North Dakota.

The most immediate effects of the terminal-Cretaceous Chicxulub impact, essential to understanding the global-scale environmental and biotic collapses that mark the Cretaceous-Paleogene extinction, are poorly resolved despite extensive previous work. Here, we help to resolve this by describing a rapidly emplaced, high-energy onshore surge deposit from the terrestrial Hell Creek Formation in Montana. Associated ejecta and a cap of iridium-rich impactite reveal that its emplacement coincided with the Chicxulub event.

Piezoelectric Accelerator.

Here we propose the conception of small-size piezoelectric accelerator of charged particles that operates due to the piezoelectric effect at varying mechanical force applied to piezoelectrics in vacuum. The accelerating voltage and the energy of accelerated particles are estimated. In the proof-of-principle experiment we demonstrate the effect of the emission of X-ray radiation at the mechanical compression of piezoelectric ceramics in vacuum.

Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment.

We present new constraints on sub-GeV dark-matter particles scattering off electrons based on 6780.0 kg d of data collected with the DarkSide-50 dual-phase argon time projection chamber. This analysis uses electroluminescence signals due to ionized electrons extracted from the liquid argon target.

Low-Mass Dark Matter Search with the DarkSide-50 Experiment.

We present the results of a search for dark matter weakly interacting massive particles (WIMPs) in the mass range below 20  GeV/c^{2} using a target of low-radioactivity argon with a 6786.0 kg d exposure. The data were obtained using the DarkSide-50 apparatus at Laboratori Nazionali del Gran Sasso.

First report of the mitochondrial DNA sequences of Chukchi Charr (, Salmonidae).

Three mitochondrial DNA regions were sequenced in two individuals of the Chukchi charr from Lake Istihed (Chukotka): the entire gene sequences of cytochrome and cytochrome oxidase-1, and control region. The low level of sequence divergence detected between the sequences suggests that is probably an isolated population of the Taranetz charr The genealogy of mtDNA haplotypes confirms the phylogenetic closeness of sp. 4 (Lake Nachikinskoe), (Lake Dal'nee), and (Lake Elgygytgyn), and (NWT).

[Genetic Differentiation of Pacific Smelt Osmerus mordax dentex Inferred from the Data of Mitochondrial DNA Analysis].

The population genetic structure of Pacific smelt Osmerus mordax dentex from 25 locations in the Sea of Japan, Okhotsk Sea, Bering Sea, Kara Sea, Barents Sea, and White Sea was examined based on mitochondrial DNA variability. The genetic structuring of O. m.

[Phylogeny of charrs of the genus Salvelinus based on mitochondrial DNA data].

Charrs of the genus Salvelinus (including Salvethymus) represent a monophyletic group of salmonid fishes that diverged from the common ancestor without subdivision into subgenera. The phylogenesis of the genus is characterized by four cycles of mitochondrial genome divergence. The first one, belonging to the Late Miocene--the border between Miocene and Pliocene (6 to 4 million years ago)--was associated with the consecutive divergence of the S.

Phylogeography of the salmonid fish, Dolly Varden Salvelinus malma: multiple glacial refugia in the North Pacific Rim.

The geographic distribution pattern of mitochondrial DNA (control region) sequence polymorphisms from 73 populations of a salmonid fish, Dolly Varden Salvelinus malma, over most of its range in the North Pacific rim, was examined to assess how its spatial population genetic structure has been molded. The observed 68 haplotypes were grouped into three main lineages, which correspond to western, central, and eastern regions in the North Pacific. The two outlier-haplotype groups gave close agreement with DNA types from two congeneric species, white-spotted charr S.

[Intraspecific polymorphism of mtDNA in Sakhalin taimen Parahucho perryi].

The intraspecific polymorphism of Sakhalin taimen Parahucho perryi (Brevoort, 1856), Salmonidae, was assessed via the RFLP analysis of mitochondrial DNA fragments that contain Cytb, the control region (D-loop), and the genes for the NADH dehydrogenase subunits 1-4, as well as the sequencing of the mitochondrial DNA COI gene. The statistically significant differentiation of the populations from the mainland coast of the Sea of Japan and the eastern and western coasts of Sakhalin Island was demonstrated. The higher level of haplotype diversity in Sakhalin populations compared to Primorye populations and the structure of haplotype genealogies suggested that all populations of Parahucho perryi originated from a common ancestor, which probably lived on the western coast of the Sakhalin Island.

Conflict(s) of interest in peer review: its origins and possible solutions.

Scientific communication takes place at two registers: first, interactions with colleagues in close proximity-members of a network, school of thought or circle; second, depersonalised transactions among a potentially unlimited number of scholars can be involved (e.g., author and readers).