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Article ; Online: Validation of Non-empirical Fat-free Mass Estimation Model for a Wrist-worn Device.

Polokhin, Aleksandr / Pronina, Anna / Boev, Andrey / Gorbunov, Stas

2022 Volume 13, Issue 1, Page(s) 31–38

Abstract: Fat-free mass (FFM) estimation has dramatic importance for body composition evaluation, often providing a basis for treatment of obesity and muscular dystrophy. However, current methods of FFM estimation have several drawbacks, usually related to either ... ...

Abstract	Fat-free mass (FFM) estimation has dramatic importance for body composition evaluation, often providing a basis for treatment of obesity and muscular dystrophy. However, current methods of FFM estimation have several drawbacks, usually related to either cost-effectiveness and equipment size (dual-energy X-ray absorptiometry (DEXA) scan) or model limitations. In this study, we present and validate a new FFM estimation model based on hand-to-hand bioimpedance analysis (BIA) and arm volume. Forty-two participants underwent a full-body DEXA scan, a series of anthropometric measurements, and upper-body BIA measurements with the custom-designed wearable wrist-worn impedance meter. A new two truncated cones (TTC) model was trained on DEXA data and achieved the best performance metrics of 0.886 ± 0.051 r
Language	English
Publishing date	2022-06-25
Publishing country	Poland
Document type	Journal Article
ZDB-ID	2580506-X
ISSN	1891-5469 ; 1891-5469
ISSN (online)	1891-5469
ISSN	1891-5469
DOI	10.2478/joeb-2022-0006
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Making the choice between bioelectrical impedance measures for body hydration status assessment.

Davydov, Dmitry M / Boev, Andrey / Gorbunov, Stas

Scientific reports

2021 Volume 11, Issue 1, Page(s) 7685

Abstract: Situational or persistent body fluid deficit (i.e., de- or hypo-hydration) is considered a significant health risk factor. Bioimpedance analysis (BIA) has been suggested as an alternative to less reliable subjective and biochemical indicators of ... ...

Abstract	Situational or persistent body fluid deficit (i.e., de- or hypo-hydration) is considered a significant health risk factor. Bioimpedance analysis (BIA) has been suggested as an alternative to less reliable subjective and biochemical indicators of hydration status. The present study aimed to compare various BIA models in the prediction of direct measures of body compartments associated with hydration/osmolality. Fish (n = 20) was selected as a biological model for physicochemically measuring proximate body compartments associated with hydration such as water, dissolved proteins, and non-osseous minerals as the references or criterion points. Whole-body and segmental/local impedance measures were used to investigate a pool of BIA models, which were compared by Akaike Information Criterion in their ability to accurately predict the body components. Statistical models showed that 'volumetric-based' BIA measures obtained in parallel, such as distance
MeSH term(s)	Animals ; Body Composition ; Body Water/metabolism ; Carps ; Electric Impedance ; Models, Biological
Language	English
Publishing date	2021-04-08
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-021-87253-4
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Article: Analiz opyta primeneniya nazal'nykh kateterov pri ostrom bakterial'nom rinosinusite.

Kozlov, V S / Gorbunov, S A / Kudryashov, S E

Vestnik otorinolaringologii

2021 Volume 85, Issue 6, Page(s) 46–51

Abstract: The number of cases of acute bacterial rhinosinusitis (ABRS) in our country tends to increase. According to clinical guidelines of the Ministry of Health of the Russian Federation, nasal catheter drainage is used to treat ABRS, but not all ENT-doctors ... ...

Title translation	An analysis of experience of using nasal catheters in acute bacterial rhinosinusitis.
Abstract	The number of cases of acute bacterial rhinosinusitis (ABRS) in our country tends to increase. According to clinical guidelines of the Ministry of Health of the Russian Federation, nasal catheter drainage is used to treat ABRS, but not all ENT-doctors use this method in daily practice. Many of them use it empirically and obtain good results. Goal: To study the experience of ENT-doctors using the YAMIK nasal catheter (NC) in their clinical practice. Material and methods: To achieve the goal, a 16-question questionnaire was developed. Further, a survey of 30 ENT-doctors was conducted via e-mail. Results and discussion: The study showed a marked dispersion of data regarding the time of starting therapy, the number of necessary procedures, as well as the components of medication solutions administered to the paranasal sinuses. At the same time, the effectiveness of the method, in doctors' opinion, is very high (above 90%). The incorrect technique of NC application, absence of studies according to the principles of Good Clinical Practice (GCP), and constructive disadvantages of NC may be probable reasons for the method undervaluation. Conclusions: The prescription of procedures with NC to patients with ABRS is empirical and is probably related to the absence of clear indications for such treatment, data on its duration, and associated therapy. Consequently, research following GCP principles is required to develop an algorithm for treating ABSR with an NC. The development of a new design for an NC that will allow each ENT-doctor to learn the method is also appropriate.
MeSH term(s)	Catheters ; Humans ; Paranasal Sinuses ; Rhinitis/diagnosis ; Rhinitis/therapy ; Russia ; Sinusitis/diagnosis ; Sinusitis/therapy
Language	Russian
Publishing date	2021-01-20
Publishing country	Russia (Federation)
Document type	Journal Article
ZDB-ID	124096-1
ISSN	0042-4668
ISSN	0042-4668
DOI	10.17116/otorino20208506146
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Book ; Online: Atomic-Scale Insights into Damage Produced by Swift Heavy Ions in Polyethylene

Babaev, P. / Akhmetov, F. / Gorbunov, S. / Medvedev, N. / Rymzhanov, R. / Voronkov, R. / Volkov, A. E.

2023

Abstract: We describe the formation of swift heavy ion tracks in polyethylene (PE) by combining the Monte Carlo code TREKIS, which models electronic excitation in nanometric proximity of the ion trajectory, with the molecular dynamics simulating a response of the ... ...

Abstract	We describe the formation of swift heavy ion tracks in polyethylene (PE) by combining the Monte Carlo code TREKIS, which models electronic excitation in nanometric proximity of the ion trajectory, with the molecular dynamics simulating a response of the atomic system to the perturbation. The model predicts circular tracks in amorphous PE but elliptical ones in crystalline PE caused by preferential propagation of excitation along polymer chains during the cooling stage. The obtained track sizes and shapes agree well with the high-resolution microscopy of tracks in PE. The velocity effect in PE is shown: the track parameters differ for ions with the same energy losses but different velocities.
Keywords	Condensed Matter - Materials Science
Publishing date	2023-07-11
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Evolyutsiya metodov aktivnogo drenirovaniya okolonosovykh pazukh pri rinosinusite. Chast' 1.

Gorbunov, S A / Rusetsky, Yu Yu / Kudryashov, S E / Malyavina, U S

Vestnik otorinolaringologii

2021 Volume 86, Issue 3, Page(s) 110–117

Abstract: Inflammation of the paranasal sinuses significantly reduces the quality of life of people and causes marked economic damage to society. The striking clinical picture of sinusitis has always forced doctors to study the disease, as evidenced by the first ... ...

Title translation	The evolution of methods of active irrigation of paranasal sinuses in rhinosinusitis. Part 1.
Abstract	Inflammation of the paranasal sinuses significantly reduces the quality of life of people and causes marked economic damage to society. The striking clinical picture of sinusitis has always forced doctors to study the disease, as evidenced by the first records of the anatomy and diseases of the paranasal sinuses by doctors in ancient Egypt more than 3.000 years BC. Sinusitis has been treated in different ways in different historical periods. Effective medication treatment appeared relatively recently and began to steadily replace the older instrumental methods, to which many people had a preconceived notion of invasiveness. However, many studies are showing the positive effect of active drainage methods and, moreover, there is data showing that the discomfort during such procedures is slightly higher than during dental treatment under local anesthesia. This article presents a review of the available scientific literature on the use of different treatments for bacterial rhinosinusitis at different historical stages, ranging from the first publications on puncture techniques to balloon dilatation and the modern approach to conservative treatment.
MeSH term(s)	Chronic Disease ; Endoscopy ; Humans ; Paranasal Sinuses ; Quality of Life ; Rhinitis/diagnosis ; Rhinitis/therapy ; Sinusitis/diagnosis ; Sinusitis/therapy ; Therapeutic Irrigation
Language	Russian
Publishing date	2021-07-15
Publishing country	Russia (Federation)
Document type	Journal Article ; Review
ZDB-ID	124096-1
ISSN	0042-4668
ISSN	0042-4668
DOI	10.17116/otorino202186031110
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Article: Evolyutsiya metodov aktivnogo drenirovaniya okolonosovykh pazukh pri rinosinusite. Chast' 2.

Gorbunov, S A / Rusetsky, Yu Yu / Kudryashov, S E / Malyavina, U S

Vestnik otorinolaringologii

2021 Volume 86, Issue 4, Page(s) 99–105

Title translation	The evolution of methods of active irrigation of paranasal sinuses in rhinosinusitis. Part 2.
Abstract	Inflammation of the paranasal sinuses significantly reduces the quality of life of people and causes marked economic damage to society. The striking clinical picture of sinusitis has always forced doctors to study the disease, as evidenced by the first records of the anatomy and diseases of the paranasal sinuses by doctors in ancient Egypt more than 3.000 years BC. Sinusitis has been treated in different ways in different historical periods. Effective medication treatment appeared relatively recently and began to steadily replace the older instrumental methods, to which many people had a preconceived notion of invasiveness. However, many studies are showing the positive effect of active drainage methods and, moreover, there is data showing that the discomfort during such procedures is slightly higher than during dental treatment under local anesthesia. This article presents a review of the available scientific literature on the use of different treatments for bacterial rhinosinusitis at different historical stages, ranging from the first publications on puncture techniques to balloon dilatation and the modern approach to conservative treatment.
MeSH term(s)	Chronic Disease ; Humans ; Paranasal Sinuses ; Quality of Life ; Rhinitis/diagnosis ; Rhinitis/therapy ; Sinusitis/diagnosis ; Sinusitis/therapy
Language	Russian
Publishing date	2021-09-09
Publishing country	Russia (Federation)
Document type	Journal Article ; Review
ZDB-ID	124096-1
ISSN	0042-4668
ISSN	0042-4668
DOI	10.17116/otorino20218604199
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Article ; Online: Local structure, thermodynamics, and melting of boron phosphide at high pressures by deep learning-driven ab initio simulations.

Chtchelkatchev, N M / Ryltsev, R E / Magnitskaya, M V / Gorbunov, S M / Cherednichenko, K A / Solozhenko, V L / Brazhkin, V V

The Journal of chemical physics

2023 Volume 159, Issue 6

Abstract: Boron phosphide (BP) is a (super)hard semiconductor constituted of light elements, which is promising for high demand applications at extreme conditions. The behavior of BP at high temperatures and pressures is of special interest but is also poorly ... ...

Abstract	Boron phosphide (BP) is a (super)hard semiconductor constituted of light elements, which is promising for high demand applications at extreme conditions. The behavior of BP at high temperatures and pressures is of special interest but is also poorly understood because both experimental and conventional ab initio methods are restricted to studying refractory covalent materials. The use of machine learning interatomic potentials is a revolutionary trend that gives a unique opportunity for high-temperature study of materials with ab initio accuracy. We develop a deep machine learning potential (DP) for accurate atomistic simulations of the solid and liquid phases of BP as well as their transformations near the melting line. Our DP provides quantitative agreement with experimental and ab initio molecular dynamics data for structural and dynamic properties. DP-based simulations reveal that at ambient pressure, a tetrahedrally bonded cubic BP crystal melts into an open structure consisting of two interpenetrating sub-networks of boron and phosphorous with different structures. Structure transformations of BP melt under compressing are reflected by the evolution of low-pressure tetrahedral coordination to high-pressure octahedral coordination. The main contributions to structural changes at low pressures are made by the evolution of medium-range order in the B-subnetwork and, at high pressures, by the change of short-range order in the P-subnetwork. Such transformations exhibit an anomalous behavior of structural characteristics in the range of 12-15 GPa. DP-based simulations reveal that the Tm(P) curve develops a maximum at P ≈ 13 GPa, whereas experimental studies provide two separate branches of the melting curve, which demonstrate the opposite behavior. Analysis of the results obtained raises open issues in developing machine learning potentials for covalent materials and stimulates further experimental and theoretical studies of melting behavior in BP.
Language	English
Publishing date	2023-08-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	3113-6
ISSN	1089-7690 ; 0021-9606
ISSN (online)	1089-7690
ISSN	0021-9606
DOI	10.1063/5.0165948
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Article ; Online: Dependence of track etching kinetics on chemical reactivity around the ion path.

Gorbunov, S A / Rymzhanov, R A / Volkov, A E

Scientific reports

2019 Volume 9, Issue 1, Page(s) 15325

Abstract: Etching kinetics of swift heavy ions (SHI) tracks in olivine is investigated in frame of experimentally verified numerical approach. The model takes into account variation of induced chemical reactivity of the material around the whole ion trajectory ... ...

Abstract	Etching kinetics of swift heavy ions (SHI) tracks in olivine is investigated in frame of experimentally verified numerical approach. The model takes into account variation of induced chemical reactivity of the material around the whole ion trajectory with the nanometric accuracy. This enables a quantitative description of wet chemical etching of SHI tracks of different lengths and orientations towards to the sample surface. It is demonstrated that two different modes of etching, governed by diffusion of etchant molecules and by their reaction with the material must be observed in experiments using techniques with different resolution thresholds. Applicability limits of the optical microscopy for detection of heavy ion parameters by measuring of the lengthwise etching rates of the ion track are discussed.
Language	English
Publishing date	2019-10-25
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-019-51748-y
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: Frontiers, challenges, and solutions in modeling of swift heavy ion effects in materials

Medvedev, N. / Volkov, A. E. / Rymzhanov, R. / Akhmetov, F. / Gorbunov, S. / Voronkov, R. / Babaev, P.

2022

Abstract: Since a few breakthroughs in the fundamental understanding of the effects of swift heavy ions (SHI) decelerating in the electronic stopping regime in the matter have been achieved in the last decade, it motivated us to review the state-of-the-art ... ...

Abstract	Since a few breakthroughs in the fundamental understanding of the effects of swift heavy ions (SHI) decelerating in the electronic stopping regime in the matter have been achieved in the last decade, it motivated us to review the state-of-the-art approaches in the modeling of SHI effects. The SHI track kinetics occurs via several well-separated stages: from attoseconds in ion-impact ionization depositing energy in a target, to femtoseconds of electron transport and hole cascades, to picoseconds of lattice excitation and response, to nanoseconds of atomic relaxation, and even longer macroscopic reaction. Each stage requires its own approaches for quantitative description. We discuss that understanding the links between the stages makes it possible to describe the entire track kinetics within a multiscale model without fitting procedures. The review focuses on the underlying physical mechanisms of each process, the dominant effects they produce, and the limitations of the existing approaches as well as various numerical techniques implementing these models. It provides an overview of ab-initio-based modeling of the evolution of the electronic properties; Monte Carlo simulations of nonequilibrium electronic transport; molecular dynamics modeling of atomic reaction on the surface and in the bulk; kinetic Mote Carlo of atomic defect kinetics; finite-difference methods of tracks interaction with chemical solvents describing etching kinetics. We outline the modern methods that couple these approaches into multiscale multidisciplinary models and point to their bottlenecks, strengths, and weaknesses. The analysis is accompanied by examples of important results improving the understanding of track formation in various materials. Summarizing the most recent advances in the field of the track formation process, the review delivers a comprehensive picture and detailed understanding of the phenomena. Comment: to be submitted
Keywords	Condensed Matter - Materials Science ; Condensed Matter - Mesoscale and Nanoscale Physics
Subject code	660
Publishing date	2022-09-21
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Features of Fodder Vegetation as a Possible Cause of Saiga Die-Offs on Steppe Pastures

Abaturov, B. D. / Gorbunov, S. S. / Koshkina, A. I.

Arid ecosystems. 2021 Oct., v. 11, no. 4

2021

Abstract: Modern climatic changes, weakening of the anthropogenic pasture load, and an increase in steppe fires have led to the expansion and dominance of grasses (graminoids) vegetation on the steppe pastures of Russia and Kazakhstan since the end of the 20th ... ...

Abstract	Modern climatic changes, weakening of the anthropogenic pasture load, and an increase in steppe fires have led to the expansion and dominance of grasses (graminoids) vegetation on the steppe pastures of Russia and Kazakhstan since the end of the 20th century. This resulted in deterioration of the forage quality of pasture vegetation, a factor in the depression of the saiga population that may have affected the increase in cases of saiga die-offs. A die-off occurred in Kazakhstan in 2015, when about 200 000 animals died. A large number of different versions have been put forward about the reasons for these deaths: an infectious disease (hemorrhagic septicemia), toxic forage plants, unfavorable weather conditions, and the destructive effect of rocket fuel. In this article, we consider a different version of death associated with the negative effect of low-quality food on the sites of saiga death. It is shown that the food supply for saigas on steppe pastures consistently decreases with an increase in the abundance of grasses in forage vegetation. Suitable, nutritious food for breeding saigas include pastures in which the share of grasses in the aboveground phytomass is no more than 30%. If this level is exceeded, the pastures do not provide the necessary level of nutrition for breeding saigas and are unsuitable for them. It is possible that the saigas found themselves during spring migration in steppe regions with a predominance of turf grasses (65–75%), which exceeds their permissible (threshold) abundance (30%). This pasture condition did not provide the necessary nutrition, caused a weakening of animals during the rearing period, and promoted the activation of infectious septicemia in breeding saigas, which, with the combined action of both factors, may have led to their die-off.
Keywords	Russia ; Saiga ; death ; die-off ; food availability ; forage quality ; graminoids ; infectious diseases ; lawns and turf ; pastures ; phytomass ; septicemia ; spring ; steppes ; toxicity ; weather ; Kazakhstan
Language	English
Dates of publication	2021-10
Size	p. 399-405.
Publishing place	Pleiades Publishing
Document type	Article
ZDB-ID	2603446-3
ISSN	2079-0988 ; 2079-0961
ISSN (online)	2079-0988
ISSN	2079-0961
DOI	10.1134/S2079096121040028
Database	NAL-Catalogue (AGRICOLA)

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