bluuebunny/crossref_metadata_2025 huggingface dataset:
Новий метод синтезу наноматеріалів для потреб нанотехнологій
Authors: Кордубан О.М. , Крищук Т.В. , Медведський М.М.
Published: August 2021

Розроблено новий метод синтезу наноматеріалів з використанням електричного вибуху провідників (ЕВП), в якому синтез нанопорошків ЕВП суміщено в часі з іншими синтезами та процесами з метою використання в них синтезованих нанопорошків у реальному часі як надактивних прекурсорів. Вперше безпосередньо з нанопорошків отримано нові типи каталітичних плазмових нанопокриттів WO3–x/нержавіюча сталь та мезопоруватих фото- та електрокаталітичних нанодисперсних плівок TiO2–x, TiO2–x/Ag. У наноматеріалах нового типу повністю збережено нанодисперсну структуру, а для їх синтезу не використовуються органічні складові. Зменшено температуру проведення реакції WО3–х + 3H2S → WS2 + S + 3H2O синтезу WS2 з 800 до 450 °С з використанням ЕВП нанопорошків WO3–x як надактивних прекурсорів. Розроблений метод синтезу наноматеріалів є новим інструментом вирішення задач в області нанотехнологій.
Нейропептид кіоторфін запобігає розвитку апоптозу фібробластів лінії L929 в умовах холодового стресу
Authors: Гулевський О.К. , Моісєєва Н.М. , Горіна О.Л.
Published: August 2021

Досліджено протиапоптотичну дію нейропептиду кіоторфін на моделі холодового стресу фібробластів лінії L929. Вплив дипептиду на клітини аналізували за морфологічними показниками, за допомогою цитофлуориметрії з одночасним фарбуванням annexin V/7-AAD та дослідженням виходу цитохрому с до цитоплазми клітин. У вибраних умовах холодового стресу відмічено вірогідне збільшення кількості клітин з морфологічними ознаками апоптозу за даними світлової мікроскопії, порушення асиметрії мембрани та зареєстровано появу в цитоплазмі клітин цитохрому с. Доведено, що додавання кіоторфіну в концентрації 100 мкг/л до середовища культивування за 15 хв до моделювання холодового стресу сприяло вірогідному зменшенню кількості клітин з ознаками апоптозу. Кількість annexin V+/7-AAD–-клітин після попередньої інкубації фібробластів з дипептидом знижувалась до 19,1 ± 0,5 % порівняно зі зразками після холодового стресу (55,3 ± 2,1 %), а кількість клітин, в цитоплазмі яких зареєстровано цитохром с, зменшувалася в 3,65 раза. На підставі результатів досліджень висловлено припущення, що попередня інкубація з регуляторним нейропептидом кіоторфін у концентрації 100 мкг/л ефективно запобігає апоптозу у фібробластах L929 в умовах холодового стресу.
АКТ ПРО ЦИФРОВІ РИНКИ: НОВА ФІЛОСОФІЯ РЕГУЛЮВАННЯ КОНКУРЕНЦІЇ В ЄС
Authors: АНДРІЙЧУК Олесь
Published: August 2021

Конкурентна політика ЄС стоїть на порозі істотного реформування. Основні положення реформи викладено в проєкті законодавчого документа – Акта про цифрові ринки, ініційованого Європейською комісією. Проте його суть виходить за межі даного Акта. Проєкт підлягає детальному і багатосторонньому обговоренню в ЄС. З огляду на безпосередній зв’язок між економіками ЄС та України і перспектив членства України в ЄС, відбувається загальна адаптація українського законодавства і технічних положень до вимог і стандартів ЄС. Природно, що і дана реформа незабаром стане частиною гармонізаційних процесів. З урахуванням комплексності й багатогранності даної реформи, не лише охоплення нею положень законодавства, але й зміни самої модальності відносин між органами конкурентної політики та найбільшими учасниками цифрової економіки, доцільно ініціювати таку дискусію вже сьогодні, поки даний законопроєкт перебуває на стадії розробки. З огляду на це, а також на загальну новизну даного процесу, проаналізовано три основних компоненти реформи. Розглянуто зовнішні передумови, що спонукали Європейську комісію до таких інноваційних (і досить контраверсійних) законодавчих кроків, описано контекст і рушійні сили. Виокремлено основні процесуальні елементи законопроєкту, показано оригінальну формулу виділення з-поміж суб’єктів цифрової економіки виключно її найбільших системних учасників і накладання на них широкого спектра зобов’язань, покликаних захистити і спонукати конкуренцію на цифрових ринках ЄС. Описано матеріальний бік нових обов’язків, передбачених реформою, наголошено на важливості її прийняття або принаймні глибокого аналізу для України.
Lubricating materials based on waste oleo products
Authors:   V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the NAS of Ukraine, Papeikin O.O. , Bodachivska L.Yu. ,   V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the NAS of Ukraine, Venger I.O. ,   V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the NAS of Ukraine, Davitadze D.Z. ,   V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the NAS of Ukraine, Spaska O.А. ,   National Aviation University
Published: August 2021

Phosphatide concentrates and waste cooking oils - wastes that do not find qualified use and sources of environmental pollution, on the one hand, and on the other - valuable raw materials for the production of lubricating materials, additives and surfactants. The paper demonstrates the possibility of using these wastes as components in technologies for obtaining hydrated calcium greases and surfactants. By saponification of phosphatide concentrates and waste cooking oils were obtained the dispersed phases of thixotropic systems and were investigated their rheological properties. Derivatives of phosphoric acid in the composition of greases form a stronger structural framework, which is characterized by increased melting point and tribological properties capable of operating in high-load friction points. Surfactants were obtained by amidation of phosphatide concentrates and waste cooking oils. Synthesized alkanolamides combine with almost all mineral and synthetic oils and based on them developed compositions of lubricating materials. Tests of these compositions shown that synthesized surfactants from waste prove as effective multifunctional additives. Due to the chelating groups -OH, -NH2, -CONH, -COOH, -PO(OH)2, hydrophobic chelate complexes are formed, which not only impart systems homogeneity, but also provide improved protective, antioxidant and tribochemical properties of oils and lubricating compositions. Bench tests of resistance to oxidation of lubricating compositions with amidated phosphatide concentrates conducted at a temperature of 150 ºC confirmed their inhibitory effect, which allows to recommend them for use in high-temperature greases.
Influence of physico-chemical parameters of surface-active systems components for minimization of evaporation of hydrocarbon liquids
Authors:   National Aviation University, Spaska O. , Chumak AV.L. ,   National Aviation University, Maksymyuk M.R. ,   National Aviation University, Rudenko V.M. ,   National Aviation University, Kosenko O.I. ,   National Aviation University, Polunkin E.V. ,   V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine, Gaidai O.O. ,   V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine
Published: August 2021

Highly efficient stable aerated hydrophilic compositions containing fluorotensides and ultralight microdisperse systems using gas-filled glass, aluminosilicate and polymer microspheres have been developed. Designing the compositions of PAS based on the surface activity of surfactants, their solubility in water and the ability to bind water and the formation of hydrogen bonds between the components. The main condition for the stability of the coating when mixing the components - the chemical interaction between them and the formation of a system that does not dissolve in hydrocarbons and does not break down in terms of use. The best film-forming characteristics necessary for the operation of the coating (simultaneous reduction of surface tension and film formation) active substances (FPAR), the non-polar part of the molecules of which contains a fluorocarbon chain, so they are insoluble in hydrocarbons, well soluble in water and easily distributed on the surface of hydrocarbon liquids, creating a protective film. The choice of co-surfactants was based on the ability to stabilize hydrophilic films on the surface of hydrocarbons not only at favorable HLB, but also at the lowest, although higher than the critical concentration of micelle formation (CCM), concentrations for forming a mixed adsorption layer of increased strength. This surfactant was water-oil-soluble twin-80, which will significantly increase the hydrophilic part and enhance the stability of the PAS and the stability of the aerated system. The introduction of glass microspheres into the components of the system has significantly enhanced its strength and stability. In the study of the stability and gas permeability of the developed surfactant systems, it was found that the insulating ability of the coating increases with increasing hydrophilic-lipophilic balance of the system and due to chemical interaction between the carboxyl group of fluorotenside and hydroxyl groups of surfactants.
The European hamster (Cricetus cricetus) in captivity: keeping and breeding experience
Authors:   Institute of archeology, NAS of Ukraine (Kyiv, Ukraine), Stanytsina Halyna , Zagorodniuk Igor ,   National Museum of Natural History, NAS Ukraine (Kyiv, Ukraine)
Published: August 2021

Hamsters have long been considered agricultural pests and their abundance has been controlled. Now in many countries they are recognized as rare and endangered species that are at a risk of extinction. Among conservation measures to preserve and restore the population of many species is to gain experience in their keeping and reproduction in captivity. The experiments were carried out with hamsters obtained from the Crimea at different times. The keeping experience of hamsters in an ordinary residential apartment and the specifics of domestication of the animals caught in the nature are described. Their captivity, cage arrangement, nutrition, reproduction, specifics of communication, seasonal and circadian rhythms, territorial behaviour, threats and factors influencing their well-being are described in detail. Practice has shown that these are friendly and interacting animals to keep at home, and their breeding as pets is promising. Even adults caught in a trap get used to people in 2–4 weeks, take food from hands, go to the cage door when they are called, remember their nickname, calmly walk on the hands and do not bite at all, even when their babies are taken to the hands. Although hamsters are nocturnal in the nature, they are often active during the day at home. They do not hibernate and are active all-year-round, and even breed in winter. Hamsters are highly sensitive to overheating and draft; both are harmful to them and lead to death. In the evenings, while walking around the room hamsters do not run away and do not hide; the cage is considered their territory, safe, and cosy. Therefore, after walks, they go to the cages themselves or ask to be placed in the cage. Quickly master the treadmill and run in it for hours. Hamsters are very different by their individual behaviour and preferences. The purpose of keeping hamsters in captivity is to introduce the species as pets and to form so-called ‘reserve populations’ to restore populations of the species in the wild. Being among the pets, this species will be preserved in the culture and will be able to be released in places where their existence would be desirable. Based on the experience gained from keeping hamsters in captivity, steps to form "wild" behaviour are recommended. The formation of artificial breeding groups, which together form a reserve population, is an important measure in restoration programmes of natural populations of Cricetus cricetus.
The Evolution of Quality Benchmarks for Bronchiolitis
Authors: Ralston Shawn L. , House Samantha A. , Harrison Wade , Hall Matthew
Published: August 2021

BACKGROUND AND OBJECTIVES

Evidence suggests that average performance on quality measures for bronchiolitis has been improving over time, but it is unknown whether optimal performance, as defined by Achievable Benchmarks of Care (ABCs), has also changed. Thus, we aimed to compare ABCs for established bronchiolitis quality measures between 2 consecutive time periods. As a secondary aim, we evaluated performance gaps, defined as the difference between median performance and ABCs, to identify measures that may benefit most from targeted quality initiatives.

METHODS

We used hospital administrative data from the Pediatric Health Information System database to calculate ABCs and performance gaps for nonrecommended bronchiolitis tests and treatments in 2 groups (patients discharged from the emergency department [ED] and those hospitalized) over 2 time periods (2006–2014 and 2014–2019) corresponding to publication of national bronchiolitis guidelines.

RESULTS

Substantial improvements were identified in ABCs for chest radiography (ED −8.8% [confidence interval (CI) −8.3% to −9.4%]; hospitalized −17.5% [CI −16.3% to −18.7%]), viral testing (hospitalized −14.6% [CI −13.5% to −15.7%]), antibiotic use (hospitalized −10.4% [CI −8.9% to −11.1%]), and bronchodilator use (ED −9.0% [CI −8.4% to −9.6%]). Viral testing (ED 11.5% [CI 10.9% to 12.1%]; hospitalized 21.5% [CI 19.6% to 23.4%]) and bronchodilator use (ED 13.8% [CI 12.8% to 14.8%]; hospitalized 22.8% [CI 20.6% to 25.1%]) demonstrated the largest performance gaps.

CONCLUSIONS

Marked changes in ABCs over time for some bronchiolitis quality measures highlight the need to reevaluate improvement targets as practice patterns evolve. Measures with large performance gaps, such as bronchodilator use and viral testing, are recommended as targets for ongoing quality improvement initiatives.
Salinity stress and plant growth regulator in basil: effects on plant and soil
Authors: Sousa Leonardo Vieira de , Silva Toshik Iarley da , Lopes Maria de Fátima de Queiroz , Leal Márcia Paloma da Silva , Basilio Ana Gabriela Sousa , Melo Filho José Sebastião de , Leal Ygor Henrique , Dias Thiago Jardelino
Published: August 2021

The water in semiarid regions contains salts in excess. When good quality water is not available it is necessary to use strategies that can make feasible the use of saline water. The aim of this study was to evaluate the effects of the application of the plant growth regulator on the culture of basil stressed with salt. The experiment was carried out in a randomized block design by the matrix “Central Box Compound”. Shoot height, stem diameter, leaf area, dry masses and soil chemical characteristics were evaluated. The salinity of the irrigation water causes reduction of the basil growth parameters, with the exception of the inflorescence dry mass. Plant growth regulator applications have effect on basil growth when plants are irrigated with saline water.
PV system interconnected to the electricity grid with hourly control of energy injection
Authors: Gutiérrez-Villegas Juan Carlos , Vejar Ruíz Set , Escamilla Martínez Agustín
Published: August 2021

Implementing Photovoltaic Systems (SFV) Interconnected to the electrical network, the energy consumption of the network is reduced, thus the SVF is a good alternative in rates where the charge is solely for energy consumption. In this work is presented the analysis of the Great Demand rate in Medium Hourly Voltage (GDMTH) that will allow designing SFV interconnected to the network helping to reduce the maximum demand for peak hours and increase the impact of the generation of energy through the PV system at rates where hourly consumption is considered. The consumption of energy by the user is analyzed, identifying that the highest demand for energy occurs in the intermediate hours and lower consumption in peak hours, however reviewing the electricity bill, the charge for consumption during peak hours increases significantly, SFV sizing is presented to reduce the estimated consumption during peak hours and the return on investment is determined. Subsequently, the implementation of a prototype to generate, store, and manage the injection of energy during peak hours is presented, analyzing the impact on the electricity bill, therefore the reduction of cost demand and energy in this hour time, is corroborated with a reduction up to 37% of monthly electricity bill.
Techno feasibility analysis of a concentrating solar thermal cooling systems at a university complex
Authors: Malagueta Diego C. , Alves Lucas de Oliveira , Pinto da Rocha Elisa
Published: August 2021

Concentrating solar thermal (CST) energy applications are growing worldwide, especially in combined cooling, heat, and power processes. Building upon the analysis of a building’s thermal comfort, and software simulations for CST, the current study evaluates a solar conditioning system integrated with absorption systems. The cooling system is equipped with single-, double- and triple-effect configurations cycle, production parameters, and thermal storage. The required fraction of auxiliary energy for the system operation is estimated. The results indicate that the double effect system is the best configuration for the adopted location in Brazil. The system’s annual auxiliary energy demand is, approximately, 20%. Triple-effect systems require less energy at higher temperatures due to local direct radiation, which then leads to an intermittent operation and greater auxiliary energy demands. The methodology applied in this work could be adopted in different locations, with an emphasis on the possibility of testing smaller scale systems in small buildings.
Síntesis del hidróxido de níquel (II) con disolución multicomponente de la lixiviación de sulfuro de la tecnología Caron
Authors: Cisneros-Sánchez Deisy , Otero-Calvi Alexis , Quesada-González Omaida , Sosa-Martínez Mercedes , Capote-Flores Neicis
Published: August 2021

Se determinaron las condiciones más favorables para la síntesis de hidróxido de níquel (II) por precipitación química a partir de la disolución lixiviada del sulfuro de níquel de la tecnología Caron.  La disolución lixiviada de fuerza iónica igual a 4,6 mol·L–1 fue tratada con hidróxidos de amonio y sodio. Se calcularon las propiedades termodinámicas como entalpía, entropía y energía libre y se construyeron diagramas de zona de predominancia. Se demostró la conveniencia de realizar el proceso a 303 K, pH entre 11 y 13 y concentración de amoníaco de 0,5 a 1,0 mol·L-1. En estas condiciones fueron obtenidas altas eficiencias de precipitación de los cationes metálicos de la disolución inicial. El sólido precipitado se caracterizó mediante espectrometría de absorción atómica y difracción de rayos X. Se obtuvo un beta-hidróxido de níquel (II) con la siguiente composición química: 58,5 ≤ Ni ≤ 59,1%, 1,7 ≤ Co ≤ 2,1%, 0,5 ≤ Fe ≤ 0,6%, Cu, Zn, Mn y Mg ≤ 0,2%.
Estudio estructural y supramolecular del ácido 2-E-((4-hidroxifenil) diazenil) benzoico
Authors: D’Vries Richard F. , García-Carreño Camila A. , Cardona-Restrepo Camila , Castro-Giraldo Elizabeth , Rojas-Alvarez Oscar E. , Ellena Javier
Published: August 2021

La estructura cristalina del compuesto ácido 2-E-((4-hidroxifenil) diazenil) benzóico se resolvió por medio del método de fase intrínseca usando datos de difracción de rayos X de monocristal, encontrando que la molécula cristaliza en el sistema cristalino ortorrómbico con grupo espacial Pbca. Dentro de su celda unidad hay cuatro moléculas por unidad asimétrica que son confórmeros moleculares. Estos confórmeros forman hélices beta a lo largo de la dirección [010]. A partir de los datos estructurales se realizó el cálculo de superficies de Hirshfeld determinando, a partir de ellas, sus correspondientes diagramas de huellas dactilares bidimensionales, lo que permitió estudiar las interacciones intermoleculares que más contribuyen al empaquetamiento cristalino. Así, se pudo determinar que la principal contribución a la superficie general está dada por los contactos H···H (34,8%), seguida de interacciones O···H/H···O (27%) y C···H/H···C (18,6%). También fueron calculadas las redes energéticas de interacción con un nivel de teoría DFT/B3LYP/6-31G(d,p), permitiendo cuantificar los valores de cada componente que aportan a la energía total, siendo las interacciones de dispersión (-57,5 kJ/mol) las que más contribuyen en la formación del empaquetamiento cristalino para este compuesto.
Materiales carbonosos preparados a partir de cuesco de palma en la adsorción de CO2. Caracterización elemental, próxima y morfológica
Authors: Acevedo Corredor Sergio Alberto , Giraldo Gutiérrez Liliana , Moreno Piraján Juan Carlos
Published: August 2021

En la presente investigación se prepararon sólidos porosos tipo carbón activado (CA) a partir de la activación química del cuesco de palma africana procedente de los cultivos de la región de la Guajira, Colombia, con soluciones de Fe(NO3)3 y Cu(NO3)2 con cambio en la concentración a dos diferentes temperaturas: 973 y 1073 K. Los sólidos adsorbentes preparados se caracterizaron para determinar sus propiedades fisicoquímicas y capacidades de adsorción de CO2.
Los CA obtenidos presentan micro-mesoporosidad con áreas superficiales entre 5 y 1300 m2g-1. Los valores con respecto al contenido de carbono fijo se encuentran entre 47,1 y 78,4%; los resultados evidencian que el proceso de activación tiene efectos sobre los parámetros texturales, composición elemental y proximal de los sólidos obtenidos. También se realizó la caracterización morfológica de la superficie de los materiales con SEM evidenciando la formación de mayor rugosidad en las muestras activadas a 1073 K, específicamente, los carbones activados con el nitrato cúprico; además, mediante EDX se cuantificó la presencia de algunos elementos. Los valores obtenidos de la adsorción de CO2 a bajas presiones se encuentran entre 80 y 250 mg·g-1, evidenciándose una mayor afinidad hacia los sólidos adsorbentes (MCu3 y MFe5).
Effect of protein content on the thermal effusivity of foods
Authors: Szafner G. , Dóka O. , Gombkötő N.
Published: August 2021

The availability of thermophysical properties of both foods and their constituents is of considerable importance to the industry. The thermal effusivity is one of the less explored thermophysical parameters. It governs the penetration of heat into materials and is defined as the square root of the product of thermal conductivity of the material, volume-specific heat capacity, and density. This paper describes the application of a relatively new inverse photopyroelectric method (IPPE) to determine thermal effusivity of dehydrated whey protein isolate and egg white powder versus protein content. In both cases the effusivity values decreased linearly with increasing protein content. One percent increase in protein content of whey protein isolate and egg white lead to 6.5 and 7.2 Ws1/2 m−2 K−1 decrease in effusivity values, respectively.
Correlation between CIELAB colour coordinates and malondialdehyde eqiuvalents in sausage with paprika stored under refrigerated conditions
Authors: Varga-Visi É. , Kozma V. , Szabó A.
Published: August 2021

Sensory properties of foods mainly affect purchasing decisions. In case of sausages, deterioration of pigments of meat and spices cause discolouration, while lipid oxidation leads to the formation of off-odours, and these two processes are connected. Lipid oxidation promotes the conversion of pigments, while the formation of metmyoglobin accelerates lipid oxidation. The scope of the study was to investigate the relationship between the amount of malondialdehyde equivalents (MDA) and CIELAB colour coordinates in a Hungarian sausage with paprika, sliced and stored under refrigerated conditions for 10 weeks. We detected negative correlation (P < 0.001) between the MDA-level and a* and b*; and positive correlation (P < 0.001) between the MDA-level and L*. The observed correlation between MDA level and colour coordinates supports the assumption that the oxidation of lipids and pigments are interrelated in the case of sausage with paprika.
Rediscovery of Hemigrammus unilineatus (Gill, 1858) (Characiformes, Characidae) in Ecuador after more than three decades
Authors: Valdiviezo-Rivera Jonathan , Carriel Martha Buenaño , Escobar-Camacho Daniel
Published: August 2021

Hemigrammus unilineatus (Gill, 1858) (Characidae) is rediscovered in Yasuní National Park, eastern Ecuador, where it has not been reported since 1987. We present a detailed taxonomic description, including measurements and photographs, as well as a distribution map of this species in Ecuador. Based on our new evidence, we confirm the presence of H. unilineatus in the Ecuadorian Amazon.
Examination of sports science faculty students’ attitudes towards online learning by different variables
Authors: Böke Hulusi , Tüfekçi Şakir
Published: August 2021

Background and Study Aim. In distance education, students’ attitudes towards this method gain importance in the process. The aim of this research is to examine the impact of coronavirus anxiety, academic self-sufficiency and life satisfaction levels of students in the faculty of sports sciences over their attitudes towards online learning.

Material and Methods. A total of 379 sports science faculty students voluntarily participated for the cross-sectional data collection. A simple random sampling method was used in the selection of students from four universities in the Eastern Anatolian region, which make up the universe of the study. Data were collected electronically and analysed by IBM SPSS and AMOS statistical package program.

Results. The structural equity model results revealed that academic self-sufficiency and life satisfaction are positive predictors of online learning attitudes and negative predictors of coronavirus anxiety. Online learning attitude was found to be positively correlated with other variables other than coronavirus anxiety. In addition, it has been determined that the scale total scores are slightly above average, except for coronavirus anxiety.

Conclusions. The results have been discussed in terms of their meaning for the environment of physical education. In this research, which created a model for understanding online learning attitudes in students of the faculty of sports sciences, it was understood that coronavirus anxiety has a statistically significant effect on online learning attitudes while academic self-sufficiency and life satisfaction do not have a statistically significant effect. Students’ positive attitude towards online learning and understanding the predictors of this attitude will be a development to be appreciated by all stakeholders of the subject.
The coordination abilities development in female students based on dance exercises
Authors: Limanskaya Olga V. , Yefimova Olena V. , Kriventsova Irina V. , Wnorowski Krzysztof , Bensbaa Abdelkrim
Published: August 2021

Background and Study Aim. The physical fitness of students is characterized by the level of their abilities development to perform movements of varying complexity. One of the important components in the system of movements is coordination skills. The aim of the study is to identify the level of special and general coordination of students majoring in "Choreography" and provide recommendations for the development of coordination skills in the process of studying modern-jazz dance.
Material and Methods. The study involved students of the first and second year of study (n = 10, at the beginning of the study (1 year) age - 17.4 ± 0.7 years) majoring in "Choreography". Tests were used to determine the level of development of general and special coordination skills. The level of coordination readiness at the beginning of training and after three semesters of training was determined. The study was conducted over three semesters (September 2019 - December 2020). Curricula for students’ training do not include the discipline "Physical Education". The development of physical qualities is the task of special subjects in the course of professional training: 16 hours per week. The workload of students in modern-jazz dance was 2 hours a week. Forms of study for a certain period - full-time (70%), online learning (10%), mixed (20%). In September 2019 and in December 2020, the same students passed selected tests.
Results. The following significant changes in increasing the coordination level of the abilities were determined: to control temporal and spatial factors of movements; coordination of movements in combination; vestibular stability; musical-rhythmic coordination (p <0.01). The proposed technique assumes that at the first stage of studying modern jazz dance two, three, four centers are coordinated in simultaneous parallel movement.
Conclusions. The need to improve the curriculum of modern jazz dance, the introduction of additional courses to the educational program in the major "Choreography". The technical and lexical base of modern jazz dance in combination with special physical training provides opportunities for the coordination skills development in choreographers.
Physiological impact of wearing a surgical face mask during walking in the COVID-19 pandemic
Authors: Akgül Mustafa Ş. , Ozcan Neslihan , Uzun Mahmut E. , Gurses Veli V. , Baydil Bilgehan
Published: August 2021

Background and Study Aim. Common use of surgical face masks is recommended for social and individual health due to the COVID-19 pandemic. However, there is no systematic report for responses of organism to wearing a surgical face mask during different exercises. In this context the purpose of this study was to examine the impacts of wearing a surgical face mask during a one-hour brisk walking.

Material and Methods. A total of thirty male (n=16) and female (n=14) volunteers (mean age and BMI of 32±1.07 years and 25.1±0.68 kg/m2, respectively) completed the protocol. This was a multiple cross-over trial for healthy volunteers. All participants took a one-hour brisk walking with and without a surgical face mask. Specific physiological measurements (HR - heart rate; BP - blood pressure, SaO2 - arterial oxygen content) were compared before and immediately after two brisk walking. Each subject served their own control.

Results. The evaluation found that there was no statistically significant difference between the mean HR and blood pressure values during the brisk walking with and without a surgical face mask, while there was a statistically significant difference in the SaO2 values on behalf of no-mask-walking (p<0.05).

Conclusions. The use of surgical face masks in healthy volunteers causes a decrease in SaO2 during brisk walking. However, it does not affect the mean pulse rate and blood pressure. Although there was a statistically significant decrease in the SaO2 parameter during mask-walking, it is possible to state that brisk walking with a surgical face mask does not have a physiologically negative impact, because this decrease is in ranges that are accepted to be normal.
Strength abilities: pattern recognition method in the management of the cumulative effect of strength loads in 8-year-old boys
Authors: Ivashchenko Olha , Khudolii Oleg , Jagiello Wladyslaw
Published: August 2021

Background and Study Aim. The purpose of the study was to determine the peculiarities of using pattern recognition method in the management of the cumulative effect of strength loads in 8-year-old boys.

Materials and methods. The study participants were 48 boys aged 8. The experiment was conducted using a 22 factorial design. The study materials were processed by the IBM SPSS 22 statistical analysis program. Discriminant analysis was performed. The study examined the impact of four variants of strength load on the formation of the cumulative training effect of three, six, nine, and twelve classes in 8-year-old boys.

Results. The discriminant analysis provided information about the impact of four orthogonal variants of strength loads on the formation of the cumulative training effect of strength exercises of three, six, nine, and twelve classes in 8-year-old boys. The obtained data make it possible to choose a load mode at each step of the CTE formation and to manage schoolchildren’s strength training.

Conclusions. The verification of the obtained discriminant functions shows their high discriminative ability and value in interpretation with respect to the general population (p < 0.05). It was found that the formation of the CTE of three classes is most influenced by the third load variant, six classes – by the third load variant, nine classes – the third load variant, twelve classes – the first load variant. The discriminant function structure coefficients made it possible to identify the factor structure of the CTE of 3, 6, 9, 12 classes, to find that the CTE3, CTE6 are associated with the work at the first place “Exercises to strengthen arm muscles”, the CTE9, CTE12 – with the work at the third (“Exercises to strengthen back muscles”) and the fourth (“Exercises to strengthen leg muscles”) places. The CTE of three, six, nine, and twelve classes depends on the modes of strength exercises and has different focuses. The CTE3 – speed and strength focus; CTE6, 9 – comprehensive focus; CTE12 – explosive-strength focus. The obtained values of centroids for the CTE of 3, 6, 9, 12 classes enable the management of schoolchildren’s strength training.
Galois coverings of one-sided bimodule problems
Authors: Babych Vyacheslav , Golovashchuk Nataliya
Published: August 2021

Applying geometric methods of 2-dimensional cell complex theory, we construct a Galois covering of a bimodule problem satisfying some structure, triangularity and finiteness conditions in order to describe the objects of finite representation type. Each admitted bimodule problem A is endowed with a quasi multiplicative basis. The main result shows that for a problem from the considered class having some finiteness restrictions and the schurian universal covering A', either A is schurian, or its basic bigraph contains a dotted loop, or it has a standard minimal non-schurian bimodule subproblem.
Deformations of circle-valued Morse functions on 2-torus
Authors: Feshchenko Bohdan
Published: August 2021

In this paper we give an algebraic description of fundamental groups of orbits of circle-valued Morse functions on T2 with respect to the action of the group of diffeomorphisms of T2
The long and winding road of reverse genetics in Trypanosoma cruzi
Authors: Chiurillo Miguel A. , Lander Noelia
Published: August 2021

Trypanosomes are early divergent protists with distinctive features among eukaryotic cells. Together with Trypanosoma brucei and Leishmania spp., Trypanosoma cruzi has been one of the most studied members of the group. This protozoan parasite is the causative agent of Chagas disease, a leading cause of heart disease in the Americas, for which there is no vaccine or satisfactory treatment available. Understanding T. cruzi biology is crucial to identify alternative targets for antiparasitic interventions. Genetic manipulation of T. cruzi has been historically challenging. However, the emergence of CRISPR/Cas9 technology has significantly improved the ability to generate genetically modified T. cruzi cell lines. Still, the system alone is not sufficient to answer all biologically relevant questions. In general, current genetic methods have limitations that should be overcome to advance in the study of this peculiar parasite. In this brief historic overview, we highlight the strengths and weaknesses of the molecular strategies that have been developed to genetically modify T. cruzi, emphasizing the future directions of the field.
Understanding the pathogenesis of infectious diseases by single-cell RNA sequencing
Authors: Huang Wanqiu , Wang Danni , Yao Yu-Feng
Published: August 2021

Infections are highly orchestrated and dynamic processes, which involve both pathogen and host. Transcriptional profiling at the single-cell level enables the analysis of cell diversity, heterogeneity of the immune response, and detailed molecular mechanisms underlying infectious diseases caused by bacteria, viruses, fungi, and parasites. Herein, we highlight recent remarkable advances in single-cell RNA sequencing (scRNA-seq) technologies and their applications in the investigation of host-pathogen interactions, current challenges and potential prospects for disease treatment are discussed as well. We propose that with the aid of scRNA-seq, the mechanism of infectious diseases will be further revealed thus inspiring the development of novel interventions and therapies.
PERCEPTION OF HARASSMENT AMONG FEMALE SURGEONS
Authors: SANTOS ELIZABETH G , ROQUE LIA , MAYA MARIA CRISTINA , MOREIRA RENI CECILIA , LIMA FERNANDA LAGE , CORREIA M ISABEL T. D.
Published: August 2021

ABSTRACT Introduction: the attraction of women by Surgery has always existed. Although Surgery has been considered a specialty for men, several women chose it, despite gender bias issues that have persisted over many years. Several obstacles have impacted the practice of women surgeons, leading them to abandon the profession, while others, perhaps bearers of a stronger spirit, managed to overcome them, and won. Objective: to assess the rates of perception of harassment against female surgeons as a cause of difficulty and negative feelings related to the specialty. Methods: we conducted a quantitative and qualitative (personal accounts) research through a questionnaire via Google Forms® sent to all women surgeons registered in the Brazilian College of Surgeons and in a WhatsApp women surgeons’ groups. The qualitative analysis was made with the Wordle® app. Results: from 821 questionnaires sent, we obtained 232 responses (28.2%). Harassment perception during training was 49.1% (n=114). From the women surgeons who perceived harassment, 56.1% reported having undergone different training than expected, with statistical significance (p<0.001). The question of having been treated differently due to being a woman also had an impact on harassment perception (77.2% harassed vs 47.5%; p<0.001). Physical (42.1% vs 6.8%) and emotional (92.1% vs 39.8%) threats were also different between groups. Conclusion: women surgeons still report great harassment perception, both moral and sexual, which impacts their feelings about the specialty.
A PRODUÇÃO ACADÊMICA BRASILEIRA SOBRE CORRUPÇÃO: UMA REVISÃO SISTEMÁTICA
Authors: Macedo Suélem Viana , Valadares Josiel Lopes
Published: August 2021

RESUMO O presente trabalho teve como objetivo caracterizar a pesquisa acadêmica brasileira sobre corrupção, produzida pelos campos das ciências humanas e das ciências sociais aplicadas. Além disso, buscou compreender como os estudos elaborados por pesquisadores da área da administração têm abordado essa temática. Para tanto, foi delimitado como espaço temporal de análise o período de 2008 a 2017. O delineamento metodológico consistiu em uma revisão sistemática da literatura nacional, que utilizou técnicas de análise de frequência e análise temática do conteúdo do material. Os resultados sugerem que as pesquisas brasileiras que abordaram a corrupção são, em sua maioria: de natureza qualitativa; o foco de investigação é a gestão pública; a abordagem do tema é realizada de uma forma geral, não se referindo a um poder ou esfera de governo específica, o referencial teórico adotado é majoritariamente internacional. O direito é a área que mais tem estudos envolvendo a corrupção, o que se reflete nos debates que são produzidos pela academia. Quanto ao campo da administração, que foi analisado de forma mais específica, os estudos elaborados seguem as mesmas características da produção científica nacional, contudo, o pequeno número de pesquisas desenvolvidas indica que a temática ainda não está totalmente acoplada à agenda dos pesquisadores.
Programa Previne Brasil: o ápice das ameaças à Atenção Primária à Saúde?
Authors: Seta Marismary Horsth De , Ocké-Reis Carlos Octávio , Ramos André Luis Paes
Published: August 2021

Resumo Desde 2017, o sistema de saúde brasileiro enfrenta uma onda de contrarreformas em políticas que ampliaram cobertura e acesso e pretenderam mudar o modelo assistencial. A Atenção Primária à Saúde (APS) tem sido atingida por atos oficiais, sinérgicos e complementares, que a alteram substancialmente. A criação de serviço social autônomo federal para provisão de médicos; a consulta pública para instituir cesta de serviços; a flexibilização da carga horária semanal de médicos e enfermeiros, que poderão integrar mais de uma equipe; a não fixação de quantitativo mínimo de agentes comunitários de saúde por equipe; formam o contexto em que o Programa Previne Brasil foi lançado para vigorar em 2020. O argumento do governo é de aumento de flexibilidade e autonomia local para organizar serviços, maior eficiência e valorização do desempenho. Críticas de sanitaristas, de alguns conselhos estaduais de gestores municipais e do Conselho Nacional de Saúde apontam o caráter privatizante, mercadológico, seletivo e focalizado da proposta que caminha na direção da cobertura universal em saúde. Este artigo analisa o Programa Previne Brasil que altera o financiamento e sugere aumento de recursos para APS numa conjuntura de congelamento do gasto social. Identificam-se contradições e alternativas.
Fatores contextuais e individuais associados à insatisfação com a assistência odontológica no Brasil
Authors: Gonçalves Katiéli Fagundes , Menegazzo Gabriele Rissotto , Hilgert Juliana Balbinot , Hugo Fernando Neves , Giordani Jessye Melgarejo do Amaral
Published: August 2021

Resumo O objetivo deste estudo foi avaliar a influência de fatores contextuais e individuais associados à insatisfação dos usuários do Sistema Único de Saúde (SUS) com o atendimento prestado pelo cirurgião-dentista na Atenção Primária à Saúde. Estudo transversal multinível, fundamentado em dados advindos de uma pesquisa de base nacional para avaliação da satisfação dos usuários com o SUS. Os dados foram coletados pelo Departamento de Ouvidoria Geral do SUS por meio de contato telefônico de uma amostra de 35.393 indivíduos de todo o país. Variáveis contextuais e individuais foram associadas à insatisfação com o serviço odontológico prestado pelo SUS. Para as análises, foi utilizado o software Stata versão 11.0 e realizada uma regressão logística multinível de efeitos aleatórios. Um total de 2.331 indivíduos de 61 municípios foram incluídos na amostra final de satisfação com o serviço odontológico. Apenas 43% dos participantes relataram haver resolução de seus pedidos e percebeu-se uma chance sete vezes maior de insatisfação para aqueles indivíduos que tiveram demanda não resolvida em relação aos que a resolveram. A presente pesquisa traz elementos que podem subsidiar o governo em ações voltadas para a melhoria do acesso e qualidade do atendimento prestado na atenção odontológica.
Entre normas socioculturais e dietéticas: o almoço para nutricionistas e mulheres leigas brasileiras, espanholas e francesas
Authors: Gaspar Maria Clara de Moraes Prata
Published: August 2021

Resumo Nas últimas décadas, a racionalidade científica nutricional consolidou-se, intensificando uma difusão de normas dietéticas que ditam o que e como comer para garantir uma boa saúde. Observa-se a ascensão de uma articulação entre normas dietéticas e normas socioculturais. Este estudo busca compreender esta articulação através da análise de discursos de nutricionistas e de mulheres leigas brasileiras, espanholas e francesas. Para tanto, analisou-se as normas socioculturais e dietéticas do almoço. Uma metodologia comparativa sincrônica e qualitativa, baseada em 131 entrevistas individuais semiestruturadas, foi utilizada. Os discursos das informantes foram confrontados com as mensagens nutricionais de saúde pública de cada país. As análises revelaram que cada nacionalidade possui códigos particulares que definem as modalidades de refeição, tanto do ponto de vista sociocultural como dietético. A definição de refeição “saudável” depende de fatores que vão do nutricional e fisiológico às dimensões sociais, culturais e simbólicas vinculadas a cada modelo alimentar, determinando rituais, temporalidades, usos e a classificação dos alimentos. Assim sendo, as normas que definem o que é percebido como saudável resultam também de sistemas normativos socioculturais.
Motivation for participation in sports among Brazilian adults: National Household Sample Survey - 2015
Authors: Wendt Andrea , Ricardo Luiza Isnardi Cardoso , Costa Caroline dos Santos , Costa Francine dos Santos , Flores Thaynã Ramos , Neves Rosália Garcia , Mielke Grégore Iven
Published: August 2021

Abstract This article aims to describe the reasons for sport participation in the Brazilian adult population according to gender, age and schooling level. This is a cross-sectional study with data from a National Household Sample Survey - 2015. The reasons to practice or not practice sports in the previous year were obtained by questionnaire with predetermined answer options. All analyses were performed in Stata 12.1 and stratified by gender. The prevalence of sports participation for men and women were 31.7% and 16.9%, respectively. The most frequent reasons for sports participation among men were: having fun, quality of life and performance. Among women, the most frequent reasons were: quality of life, performance and medical recommendation. Regarding reasons for not practicing sports, the most reported ones were: lack of time (38.8% for men and 37.8% for women), not enjoying (34.8% for men and 35.3% for women) and health problem (20.3% for men and 17.9% for women). The study findings showed the most frequent reasons for sport participation in Brazil. Understanding these reasons and how they affect different age ranges and educational levels may contribute to improve strategic planning to promote sports in middle-income countries.
Qualidade de vida: impactos de um programa de promoção da saúde do setor de saúde suplementar
Authors: Pohl Hildegard Hedwig , Beschorner Carmem Elisa , Couto Analie Nunes , Lenhard Tiago Henrique , Santos Polliana Radtke dos
Published: August 2021

Resumo O objetivo deste trabalho foi comparar indicadores da qualidade de vida e parâmetros clínicos de usuários que participam de um programa de promoção da saúde, no âmbito da saúde suplementar, na linha de cuidado cardiovascular. Trata-se de um estudo observacional e transversal, realizado com 251 sujeitos das regiões do Conselho Regional de Desenvolvimento Vale do Taquari e do Conselho Regional de Desenvolvimento Vale do Rio Pardo/RS. Para a avaliação da qualidade de vida, utilizou-se o questionário WHOQOL-BREF. Os participantes se caracterizaram pela predominância de mulheres, idosos, do aumento do número de sujeitos de alto risco cardiovascular (37,8%) e de boa qualidade de vida. As médias dos parâmetros clínicos apontaram índice de massa corporal de obesidade grau I, pressão arterial normal, perfil lipídico e glicemia de jejum adequados. Após participarem durante um ano do programa, foram identificadas reduções significativas para as médias dos triglicerídeos (p = 0,031), pressão arterial diastólica (p = 0,000), pressão arterial sistólica (p = 0,013), mas no domínio geral da qualidade de vida (p = 0,004) houve um aumento significativo. Se faz necessário considerar e intervir nos condicionantes sociais de saúde e promover a intersetorialidade, inclusive entre o público e o privado.