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Journal articles on the topic 'Sharp stress reaction'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

К.В., Седих, та Клименко Ю.О. "ПСИХОЛОГІЧНІ ОСОБЛИВОСТІ СТРЕСОВОГО РОЗЛАДУ В УЧАСНИКІВ ВСЕУКРАЇНСЬКОГО МАЙДАНУ". Вісник Харківського національного педагогічного університету імені Г.С. Сковороди "Психологія", № 52 (15 січня 2016): 316–24. https://doi.org/10.5281/zenodo.44827.

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The article deals with psychological features and signs of posttraumatic stress disorders and sharp stress reactions; problems of social psychological adaptation of military men. It is described the experience of using rehabilitation program for the participant of all Ukrainian Maidan.

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Малыгин, Г. А., В. И. Николаев, В. М. Крымов, С. А. Пульнев та С. И. Степанов. "Межфазные напряжения и аномальный вид кривых псевдоупругой деформации в кристаллах сплава Ni-=SUB=-49-=/SUB=-Fe-=SUB=-18-=/SUB=-Ga-=SUB=-27-=/SUB=-Co-=SUB=-6-=/SUB=-, деформированных сжатием в направлении оси [011]-=SUB=-A-=/SUB=-". Журнал технической физики 89, № 6 (2019): 873. http://dx.doi.org/10.21883/jtf.2019.06.47634.356-18.

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AbstractWe have performed experimental and theoretical investigation of the anomalous form of the compression diagrams and shape memory restoration curves in Ni_49Fe_18Ga_27Co_6 alloy crystals deformed by uniaxial compression along the [011]_ A crystallographic direction ( A -austenite) in the temperature range of 200–350 K. It is found that in the investigated temperature range, all compression diagrams contain anomalous segments of smooth and sharp decrease in deforming stresses. It is shown that the segments of a smooth decrease in stress are associated with peculiarities in martensite reac

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Nuzhyna, Nataliia, and Olga Gaidarzhy. "RESISTANCE OF NERIUM OLEANDER L. TO SHARP HYPO- AND HYPERTHERMIA." Bulletin of Taras Shevchenko National University of Kyiv. Series: Biology 97, no. 2 (2024): 28–33. http://dx.doi.org/10.17721/1728.2748.2024.97.28-33.

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B a c k g r o u n d . Global climate changes have a negative impact on the life of native plants, reducing biodiversity. But on the other hand, the increase in average annual temperature causes the natural migration of species and can make it possible to grow plants from warmer climatic zones, which are not yet widely cultivated in Ukraine. One of these plants is the valuable medicinal and highly decorative plant Nerium oleander L. The purpose of this work was to investigate the resistance of N. oleander plants to sharp hyperthermia and hypothermia. The obtained data can be used for the potent

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Kaur, Aparjot, and S. K. Thind. "Cytokinins along with Osmoprotectant Trehalose Overcome the Deleterious Effect of Drought Stress on Wheat." International Journal of Environment and Climate Change 13, no. 10 (2023): 3770–81. http://dx.doi.org/10.9734/ijecc/2023/v13i103050.

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Experiment was conducted to evaluate, how the foliar application of trehalose (tre) along with kinetin (kn) and benzyl adenine (BA) affect the wheat genotypes (HD2967, PBW660 and WH1105) under drought stress conditions. Trehalose, Kn and BA tested in laboratory studies for their best concentrations, were applied in field grown wheat under drought. Presently, significant reduction was observed in leaf area, relative growth, Hill reaction and harvest index and sharp increase was recorded in concentration of non-enzymatic antioxidants constituents at both stages except reduced ascorbic acid conte

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Brückner, W., W. Pitschke, S. Baunack, and J. Thomas. "Mechanical Stress, Grain-boundary Relaxation, and Oxidation of Sputtered CuNi(Mn) Films." Journal of Materials Research 14, no. 4 (1999): 1286–94. http://dx.doi.org/10.1557/jmr.1999.0175.

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This paper focuses on understanding stress development in CuNi42Mn1 thin films during annealing in Ar. In addition to stress-temperature measurements, resistance-temperature investigations and chemical and microstructural characterization by Auger electron spectroscopy, scanning and transmission electron microscopy, x-ray diffraction, and atomic force microscopy were also carried out. The films are polycrystalline with a grain size of 20 nm up to 450 °C. To explain the stress evolution above 120 °C, atomic rearrangement (excess-vacancy annihilation, grain-boundary relaxation, and shrinkage of

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Zlobina O. W., Pakhomy S. S., Bugaeva I. O., Ivanov A. N., Moskvina A. O., and Kostromina E. M. "Reactivity of stress-implementing system under conditions of light regime change in experiment." Optics and Spectroscopy 130, no. 6 (2022): 705. http://dx.doi.org/10.21883/eos.2022.06.54707.35-22.

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Influence of light exposure duration (model 18:6) on hormonal indices of stress-implementing system in laboratory animals blood is studied. Activity of stress systems central link was evaluated based on data on concentration of adrenocorticotrophic hormone, melatonin and β-endorphin in blood serum, observed during enzyme immunoassay. Reaction of peripheric link of the stress-implementing system was evaluated in blood smears based on results of qualitative count of catecholamine granules in erythrocytes. It was established, that variations of hormonal indices of the stress systems for laborator

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Kondashevskaya, M. V., K. A. Artem’eva, M. A. Kozlova, D. A. Areshidze, and L. V. Kaktursky. "MINUSES AND UNEXPECTED ADVANTAGES OF THE OLD WISTAR RATS’ BODY REACTION AT MODELING POST-TRAUMATIC STRESS DISORDER." Доклады Российской академии наук. Науки о жизни 512, no. 1 (2023): 486–94. http://dx.doi.org/10.31857/s268673892360036x.

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Old Wistar rats exhibit the same general signs of a PTSD-like condition as young animals, when modeling post-traumatic stress disorder (PTSD). At the same time, a number of behavioral features, psycho-emotional manifestations and myocardial state were revealed in old rats. For the first time, it was found a sharp rise in the level of circulating testosterone, which contributes to a more rapid decision on the direction of movement in the labyrinth space under stress in old rats, in contrast to young ones. The index of the ratio of testosterone to corticosterone levels can serve as a guideline f

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Ravindra, Kannojiya, Shukla Akshat, Jain Mohit, Kaintura Sarthak, and Bachchan Aditya. "Performance Assessment of Stress Concentration Reduction Methods in Mild Steel Transmission Shaft." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 3 (2020): 4072–76. https://doi.org/10.35940/ijeat.C5528.029320.

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A shaft is subjected to tensile stress, compressive stress, torsional force and bending moment due to reaction on the components. The stress distribution in a shaft can be is similar to the flow of fluid in a channel. So, it is perfectly logical to use the fluid analogy to understand the phenomenon of stress concentration. When the cross section is uniform the flow is uniform whereas if there is a sudden change in the cross section then the velocity increases to keep the flow rate constant .The same phenomenon is observed in the shaft i.e. when the cross section of the shaft is uniform through

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Puntarulo, Susana. "Effect of oxidative stress during imbibition of soybean embryonic axes." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 102 (1994): 279–86. http://dx.doi.org/10.1017/s026972700001424x.

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SynopsisBoth respiration and generation by soybean embryonic axes showed a sharp increase upon germination, leading to a significant increase in the steady-state concentration of and H2O2 after 6 h of imbibition. An assay was developed to assess in vivo generation of reactive oxygen species, based upon DCFH-DA oxidation. Fluorescence of the external medium was dependent on reaction time and axes number and was inhibited by catalase.α-Tocopherol content declined significantly after 24 h of incubation, as compared to the content at the onset of germination. Incubation in the presence of redox cy

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Basova, Yevheniia, Sergey Dobrotvorskiy, and Ihor Yakovenko. "MODELLING CHANGES IN THE PRODUCTION COMPONENT OF FLEXIBILITY OF MANUFACTURING SMALL AND MEDIUM-SIZED MACHINE-BUILDING ENTERPRISES UNDER CONDITIONS OF SHARP FLUCTUATIONS IN MARKET SUPPLY AND DEMAND." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 2 (December 28, 2024): 6–13. https://doi.org/10.20998/2079-0775.2024.2.01.

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The paper proposes an enlarged model in the form of an integral functional of enterprise flexibility, which describes the stability of small and medium-sized machine-building enterprises in the conditions of stress factor - fluctuations in supply and demand. This model allows the reduction of the reaction time of enterprise management to negative external factors and to predict the need for management decisions on resource allocation and innovation to minimize the time to restore the stability of machine-building enterprise functioning in new production realities under changes in the market. B

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Waad Abdulsattar Zakaria. "Numerical Study on Effect of a Suspended Boulder in Soil Matrix on a Domestic Foundation." Diyala Journal of Engineering Sciences 7, no. 1 (2014): 1–15. http://dx.doi.org/10.24237/djes.2014.07101.

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Here in this study it is assumed that an undetected large size boulder, has a sharp edge and projecting upwards making a “point force or a point reaction,” and exists directly under domestic footing. The beam on elastic foundation (Hetenyi-solution, 1946) will change to different spring constants reflecting soil and boulder strength properties, and in this way the problem is analyzed numerically in FE method using STAAD-Pro/2004 program. The usual stresses and strains existing in concrete footing will eventually change, the case which this study may show. In other words, the study is concerned

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Дерюгина, А. В., М. Н. Иващенко, П. С. Игнатьев, et al. "DIAGNOSTIC CAPABILITIES OF THE ELECTROPHORETIC MOBILITY OF RED BLOOD CELLS AND BUCCAL CELLS IN STRESS." ZHurnal «Patologicheskaia fiziologiia i eksperimental`naia terapiia», no. 1() (March 11, 2019): 106–11. http://dx.doi.org/10.25557/0031-2991.2019.01.106-111.

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Диагностика стресс-реактивности по анализу гормонального состояния организма, является сложной, экономически затратной и трудоемкой процедурой исследования. В связи с этим актуален поиск информационных технологий, которые достаточно легко реализуются в любой медицинской лаборатории и позволяют оценить стресс-реакцию организма. Цель работы - оценка диагностических возможностей электрофоретической подвижности эритроцитов и клеток буккального эпителия в процессе развития стрессовой реакции. Методика. Для моделирования стресса использовали внутрибрюшинное введение крысам раствора адреналина-гидрох

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Sendi, Rabab Khalid, Shahrom Mahmud, and Amna Sirelkhatim. "A Comparative Study between the Effects of Oxidizing and Reducing Atmospheres on the Properties of ZnO-Bi₂O₃-Mn₂O₃ Varistor Fabricated from Micro and Nanoparticles Size of ZnO." Advanced Materials Research 925 (April 2014): 428–32. http://dx.doi.org/10.4028/www.scientific.net/amr.925.428.

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Zinc oxide-based varistors are semiconductor ceramics. Their excellent nonlinear electrical behaviors are induced from their grain boundaries and depend on their microstructural characteristics. From a theoretical aspect, finer primary particles with narrow size distributions provide better electrical and optical properties. Thus, these properties are related to the morphology and size of ZnO grains. In this study, ZnO-Bi2O3-Mn2O3 varistors fabricated from ZnO micro-and nanoparticle powders are prepared via conventional ceramic processing. The effects of ZnO particle size and different anneali

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Ilnitsky, O. A., A. V. Pashtetsky, Yu V. Plugatar, and S. P. Korsakova. "Water relation features of prunus laurocerasus l. under progressive soil drought stress of soutern coast of the Crimea." Rossiiskaia selskokhoziaistvennaia nauka, no. 2 (April 9, 2019): 28–33. http://dx.doi.org/10.31857/s2500-26272019228-33.

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Study the Ecophysiological reaction Prunus laurocerasus L. effect of progressive soil drought determined optimum thresholds and zones of soil moisture, temperature and light, photosynthesis and transpiration limiting Prunus laurocerasus L. in summer active vegetation on southern coast. Start of development of the plant water stress and inhibition of photosynthesis - the soil moisture reduction to 30% of FC.; Temperature optimum photosynthesis whose exceeding leads to inhibition of the enzyme activity and reduce the rate of photosynthesis - metal temperature 35 C; Growth inhibition, reduction t

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Plakhotniuk, E., T. Skobelskaya, V. Lemeshchenko, E. Kuevda, and N. Saenko. "Adaptive morphogenesis of the adrenal glands of ducks in conditions of hyperthermia." IOP Conference Series: Earth and Environmental Science 937, no. 2 (2021): 022014. http://dx.doi.org/10.1088/1755-1315/937/2/022014.

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Abstract It was found that under conditions of hyperthermia, morphofunctional changes develop in the interrenal part of the adrenal glands, indicating an increase in the functional activity of the gland. The study of ducks on the 5th day of hyperthermia revealed loosening and thickening of the adrenal gland capsule compared to the control. Significant hemodynamic disorders were noted: the phenomena of stasis and erythrocyte sludge in sharply expanded blood capillaries of the adrenal glands. It was found that on the 10th day of hyperthermia, hemodynamic disorders are progressive: the phenomena

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Sahoo, Sachidananda, Kishore Kumar Prusty, and Satyaranjan Mishra. "MHD Flow of Micropolar Fluid via Porous Medium Within the Rotating Frame of Reference." Mathematical Modelling of Engineering Problems 8, no. 1 (2021): 25–32. http://dx.doi.org/10.18280/mmep.080103.

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The present study reveals the heat and mass transfer on the MHD flow of micropolar fluid in a porous medium within a rotating frame. In order to facilitate osillatory plate velocity with constant suction and first order chemical reaction has been considered. Using small perturbation approximation, the governing non-dimensional equations are solved. The influence of pertinent physical quantities on the flow phenomena have been presented graphically. The skin friction coefficient, wall couple stress, Nusselt and Sherwood number have also computed for different flow parameters and have presented

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Luo, Fengbao, Jian Shi, Qianqian Shi, Xiaozhou He, and Ying Xia. "ERK and p38 Upregulation versus Bcl-6 Downregulation in Rat Kidney Epithelial Cells Exposed to Prolonged Hypoxia." Cell Transplantation 26, no. 8 (2017): 1441–51. http://dx.doi.org/10.1177/0963689717720296.

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Hypoxia is a common cause of kidney injury and a major issue in kidney transplantation. Mitogen-activated protein kinases (MAPKs) are involved in the cellular response to hypoxia, but the precise roles of MAPKs in renal cell reactions to hypoxic stress are not well known yet. This work was conducted to investigate the regulation of extracellular signal-regulated kinase-1 and -2 (ERK1/2) and p38 and their signaling-relevant molecules in kidney epithelial cells exposed to prolonged hypoxia. Rat kidney epithelial cells Normal Rat Kidney (NRK)-52E were exposed to hypoxic conditions (1% O2) for 24

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Konev, A. D., I. V. Aksenov, and V. A. Tutelyan. "Influence of Derivatization Temperature and Butylated Hydroxytoluene on the Content of Malondialdehyde in Liver Homogenates." Biomedical Chemistry: Research and Methods 7, no. 2 (2024): e00215. http://dx.doi.org/10.18097/bmcrm00215.

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Malondialdehyde (MDA) is a product of lipid peroxidation that is widely used as a marker of oxidative stress in biomedical research. Detectable levels of MDA can vary significantly, which may be due to its formation in vitro during sample preparation. The purpose of the work was to analyze the methodological reasons for overestimating the malondialdehyde content in the liver and to find approaches to eliminate the flaws of the method. The amount of MDA was estimated by its derivatization with 2-thiobarbituric acid (TBA) with subsequent analysis by HPLC with fluorimetric detection. Increasing t

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Lapirova, T. B. "The reaction of immunophysiological parameters of carp yearlings (Cyprinus carpio) to intraperitoneal administration of Arochlore." Regulatory Mechanisms in Biosystems 8, no. 4 (2017): 476–81. http://dx.doi.org/10.15421/021773.

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Over 14 days we investigated the effect of a single intraperitoneal administration of Aroclor 1254, one of the most widespread mixtures of polychlorinated biphenyls, on the indexes of the spleen and liver, the level of hemoglobin and the total protein, glucose and circulating immune complexes of the blood serum of carp yearlings (Cyprinus carpio L.). The toxicant was dissolved in vegetable oil, to assess the effect of which the data of a separate group of fish were analyzed in addition to the intact control. It was shown that in both groups of fish injected, both with just oil and with Aroclor

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El Hassan, Amged, Waleed Ahmed, and Essam Zaneldin. "Investigating the Impact of Inclusions on the Behavior of 3D-Printed Composite Sandwich Beams." Buildings 12, no. 9 (2022): 1448. http://dx.doi.org/10.3390/buildings12091448.

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In this study, a finite element model was developed, and a detailed analysis was carried out to investigate the impact of inclusions on the mechanical characteristics of a 3D-printed composite sandwich beam that could initiate when printing the layers, especially during the transition period between the dissimilar material that would affect the interfacial strength between the layers that would cause the failure of the 3D-printed beams. Several parameters that could influence the failure mechanism have been investigated. These parameters include the location, size, material properties, and int

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KALIMULLIN, I. F., E. B. SHARAFUTDINOVA, and A. P. ZHUKOV. "USE OF INTEGRAL LEUKOCYTE INDICES IN ASSESSING THE EFFECT OF STRESS FACTORS ON GOAT HOMEOSTASIS." Izvestiâ Timirâzevskoj selʹskohozâjstvennoj akademii, no. 3 (2023): 148–57. http://dx.doi.org/10.26897/0021-342x-2023-3-148-157.

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The principle of a quantitative-qualitative approach, which reflects the activity of the organism while distinguishing its specific and non-specific adaptive responses, includes the requirement for quantitative assessment of specific changes in the body. To achieve the research objective, the resources of integral leukocyte indices (ILI) were used to assess the homeostasis of goats during castration, weaning from dams and transfer from pasture to stabling. After percutaneous castration, the index data vary significantly in a day, and in the month following the operation they slowly return to t

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Semyonova, Victoria G., Alla E. Ivanova, Tamara P. Sabgayda, Galina N. Evdokushkina, and Vyacheslav G. Zaporozhchenko. "The first year of the pandemic: social response in the context of causes of death." HEALTH CARE OF THE RUSSIAN FEDERATION 66, no. 2 (2022): 93–100. http://dx.doi.org/10.47470/0044-197x-2022-66-2-93-100.

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Significance. The COVID-19 pandemic has led to a number of social consequences affecting various spheres of life in modern society. Purpose: to assess changes in mortality from causes caused by social stress during the COVID-19 pandemic in a metropolis (Moscow). Material and methods. The analysis is based on data from Federal State Statistics Service and the database of deaths in Moscow (medical death certificates issued to medical organizations of the Moscow Department of Health) for 2019-April 2021. Results. During the COVID-19 pandemic since April 2020, losses from suicides turned out to be

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Ren, Junru, Ling Zhou, Chaoshan Yang, Rui Mu, Lei Mao, and Yuhao Zhu. "Dynamic Behaviors of Fiber-Reinforced Cellular Concrete Fabricated with Millimeter-Sized Superabsorbent Polymer." Advances in Civil Engineering 2023 (November 8, 2023): 1–18. http://dx.doi.org/10.1155/2023/6629970.

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A novel cellular concrete with millimeter-level pores fabricated with superabsorbent polymers and fiber is introduced. Porous structure with reinforcement of fiber are adopted to improve crack resistance and shock-absorbing ability. To investigate the dynamic mechanical performance of fiber-reinforced cellular concrete, quasistatic compression and split Hopkinson pressure bar tests with strain rate from 15 to 90 s−1 were conducted. Three different fiber volume fractions (0.2%, 0.6%, and 1%), and two types of fibers (polypropylene fiber and basalt fiber (BF)) were adopted. Along with two levels

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Kosenko, K. A. "Comparative characteristic of manifestations of pathological anxiety in workers of the marine merchant and passenger fleets." Archives of psychiatry 25, no. 3 (2019): 168–72. http://dx.doi.org/10.37822/2410-7484.2019.25.3.168-172.

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Background. The activities of seafarers are extremely complex and at the same time risky professions; they put forward specific requirements for the crew of ships. Long seagoing are associated with the constant presence of crew members in a confined space, monotony of activity, a sharp narrowing of external social relations, an increased risk of emergency situations and etc. Scientific studies show the differentiation of the negative impact of occupational stress factors depending on the ranks of long-distance sailors. Objective – to study the specifics of manifestations of anxiety react

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Kolyadenko, K. V., and O. E. Fedorenko. "Features of emergency remote dermatological care in wartime." Ukrainian Journal of Dermatology, Venerology, Cosmetology, no. 1 (May 30, 2022): 26–30. http://dx.doi.org/10.30978/ujdvk2022-1-2-26.

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On February 24, 2022, the sudden aggression of the Russian Federation against Ukraine began. The usual way of life has changed. Due to the real risks to life, the traditional majority of medical services and outpatient consultations have become impossible. The question arose as to how to provide dermatological care to patients in this situation. At this time, especially useful was the use of the Internet, namely Facebook and Telegram. Materials and methods. We created several posts on Facebook where announced free online medical consultation during the war. Moreover, a Telegram channel w

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Zakharova, L. A. "Nitrogen oxides as a factor in the variability of chlorophyll content in leaf tissues of Salix kochiana Trautv. at different stages of vegetation." Проблемы ботаники южной сибири и монголии 20, no. 1 (2021): 198–202. http://dx.doi.org/10.14258/pbssm.2021037.

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In this work, the variability of the content of chlorophylls in the tissues of the plant leaves of the introducedspecies Salix kochiana in response to the action of low doses of nitrogen oxides was determined. To set up the experiment,a fumigation chamber was used to simulate environmental pollution with nitrogen oxides, concentration 0.5; 1.0; 1.5 and2.0 units of the maximum one-time MPC. It was found that the relationship between the dose of the operating gas and thechlorophyll content is non-linear. At the beginning of the growing season, under the influence of nitrogen oxides with aconcent

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Tverezovska, N. T. "The influence of emergencies on the psychological condition of man." Humanitarian studios: pedagogics, psychology, philosophy 3, no. 152 (2020): 75–83. http://dx.doi.org/10.31548/hspedagog2020.03.075.

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The influence of emergency situations on the psychological state of the victims is shown. Their frequency, typical for the modern world, carries threats to life and personal dangers. The negative thing is that emergency situations occur suddenly and at night, are accompanied by disruption of communications, and in cases of natural disasters, a sharp deterioration in weather conditions occurs. It has been proven that 12-15% of persons in emergency situations retain self-control, the ability to rationally assess the situation, to act clearly and decisively even in the most difficult conditions.

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Ye, Jun. "Modeling decision-making dynamics in financial management through biomechanical principles and bio-inspired analytical frameworks." Molecular & Cellular Biomechanics 21, no. 4 (2024): 703. https://doi.org/10.62617/mcb703.

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This study presents a novel approach to financial decision-making by integrating biomechanical principles with neural network architectures. The research establishes a framework that models market dynamics using mechanical analogies, incorporating concepts such as market elasticity, stress-strain relationships, and dynamic equilibrium. A bio-inspired neural network architecture is developed to process market indicators and generate trading decisions, combining mechanical parameters with Machine Learning capabilities. The model was validated using market data from 2018–2023, with out-of-sample

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Devaraj, Rajeev, Jonathan Jordan, Christophe Gerber, and Ayodele Olofinjana. "Exploring the Effects of the Substitution of Freshly Mined Sands with Recycled Crushed Glass on the Properties of Concrete." Applied Sciences 11, no. 8 (2021): 3318. http://dx.doi.org/10.3390/app11083318.

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Although many works have reported on the effects of using waste materials on the functional properties of concrete, the results are generally diverse. In this work, the effects of substitution of fresh sands with crushed waste glass (CWG) for a concrete mix design of 32 MPa concrete is explored. The mechanical properties were followed with standardised mechanical tests including compression, indirect tensile, and four-point bend tests. It is shown that the compressive strength of concrete containing 15% of CWG produced the highest compressive strength of 34.54 MPa. The splitting tensile and fl

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Bégué, F., L. P. Baumgartner, T. Müller, B. Putlitz, and T. W. Vennemann. "Metasomatic Vein Formation by Stationary Fluids in Carbonate Xenoliths at the Eastern Margin of the Bergell Intrusion, Val Sissone, Italy." Journal of Petrology 60, no. 12 (2019): 2387–412. http://dx.doi.org/10.1093/petrology/egaa012.

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Abstract Fluid flow is an important mechanism associated with heat and mass transport within the Earth’s crust. The study of veins, which represent channelling of fluids, can thus be key in understanding these fluid movements, unravelling fluid composition and origin, paleo stress regimes, and the history of the host-rock. New stable isotope data on carbonates and silicates have been combined with phase petrology, mass balance, and field observations to evaluate the formation mechanism of metasomatic reaction veins in dolomitic xenoliths in the Bergell tonalites (Val Sissone, Italy). Multiple

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Mykulyak, S. V., V. O. Polyakovskyi, and S. I. Skurativskyi. "Experimental study of shear deformation of the medium formed by the massif of ribbed grains." Geofizicheskiy Zhurnal 43, no. 2 (2021): 178–88. http://dx.doi.org/10.24028/gzh.v43i2.230197.

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The approach to the study of the seismically active zone as an open system that is in a state of self-organized criticality is becoming increasingly used in modern research. The models used in this approach should reflect the most characteristic features of such media: discreteness, nonequilibrium, nonlinear and nonlocal nature of interactions. In this paper, the medium is modeled by a granular massif with ribbed grains. Three different massifs are used in the research. Within one massif, all grains are identical, while grains from different massifs differ in shape (cubic or irregular ribbed)

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Kravets, O. V., V. V. Yekhalov, and V. V. Gorbuntsov. "Endocrine disorders in burn disease. Literature review." General Surgery, no. 3-4 (December 29, 2023): 79–87. http://dx.doi.org/10.30978/gs-2023-3-79.

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The purpose of the review is to highlight clinically hidden variants of hormonal dysfunctions in burn disease, which strongly determine the peculiarities of the course of the pathological condition but are often overlooked by clinicians. Based on available literary sources, this study provides a comprehensive analysis of specialised medical reports from both domestic and foreign researchers. The focus of this analysis was on compensatory and pathological shifts in hormonal regulation of the body in individuals suffering from local heat injury. The collected scientific data is expected to be us

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Hodovanyi, O. "Clinical evaluation of the effectiveness of electrophoresis with a periodontal gel composition based on a flavonoid complex under the conditions of stress-modulating effect of fixed orthodontic appliances on periodontal tissues." SUCHASNA STOMATOLOHIYA 116, no. 5 (2023): 54. https://doi.org/10.33295/1992-576x-2023-5-54.

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Introduction. One of the most important biological reactions to orthodontic treatment with braces is oxidative stress, which in patients with periodontal diseases is associated with a number of proinflammatory factors and hypoxia. The development of effective treatment regimens to eliminate the effects of local oxidative stress and the use of adequate prognostic markers for its regulation is an important promising area in the treatment of orthodontic patients with periodontal tissue diseases. The aim of this study was to evaluate the clinical efficacy of the developed therapeutic and prophylac

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Vojtova, Lucy, Lenka Michlovska, Kristyna Valova, et al. "The Effect of the Thermosensitive Biodegradable PLGA–PEG–PLGA Copolymer on the Rheological, Structural and Mechanical Properties of Thixotropic Self-Hardening Tricalcium Phosphate Cement." International Journal of Molecular Sciences 20, no. 2 (2019): 391. http://dx.doi.org/10.3390/ijms20020391.

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The current limitations of calcium phosphate cements (CPCs) used in the field of bone regeneration consist of their brittleness, low injectability, disintegration in body fluids and low biodegradability. Moreover, no method is currently available to measure the setting time of CPCs in correlation with the evolution of the setting reaction. The study proposes that it is possible to improve and tune the properties of CPCs via the addition of a thermosensitive, biodegradable, thixotropic copolymer based on poly(lactic acid), poly(glycolic acid) and poly(ethylene glycol) (PLGA–PEG–PLGA) which unde

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Hryntsova, N. B., A. M. Romaniuk, L. I. Kiptenko, and L. G. Sulym. "Morphological changes of sexually mature rat's pineal gland and cerebellar cortex under long-term exposure to heavy metal salts." Reports of Morphology 28, no. 4 (2022): 54–63. http://dx.doi.org/10.31393/morphology-journal-2022-28(4)-08.

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Pollution with heavy metal salts is an important environmental problem today, having an adverse effect on public health. The endocrine system maintains homeostasis in the body. The purpose of the work is to study the morphological changes of the cerebellar cortex and epiphyses of sexually mature male rats under the condition of long-term exposure to the body of a complex of heavy metal salts. The morphological changes in the cerebellar cortex and epiphysis of sexually mature male rats under the condition of long-term exposure to heavy metal salts was studied. Animals of the experimental group

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Koshurba, Illia V., Fedir V. Hladkykh, and Mykola O. Chyzh. "THE EFFECT OF PLACENTAL CRYOEXTRACT ON THE STATE OF PROTEIN-LIPID METABOLISM IN THE GASTRIC MUCOSA IN EXPERIMENTAL STRESS-INDUCED ULCERS." Eastern Ukrainian Medical Journal 10, no. 2 (2022): 155–64. http://dx.doi.org/10.21272/eumj.2022;10(2):155-164.

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Introduction. Peptic ulcer is one of the most prevalent diseases of the gastrointestinal tract. Stress factor is considered to have the highest impact on the development of ulcers, as it is present in almost all cases of onset and exacerbation of this disease. Acute stress ulcers occur with severe injuries, acute diseases of various organs, shock, a sharp drop in blood pressure, oxygen deficiency of body tissues, liver, kidney and others. Given the above facts, in the correction of stress-induced lesions of the gastric mucosa (GM) therapeutically, the target should consider not only reducing t

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Nicmane, Lolita Terēze, and Regīna Baltušīte. "VALIDATION OF MEDIATION COMPETENCE IN SCHOOL ENVIRONMENT." SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 2 (May 28, 2021): 430–43. http://dx.doi.org/10.17770/sie2021vol2.6326.

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We are living in uneasy and unusual times of sharp changes. The situation that arouse due to the spread of COVID-19 is causing serious stress for most of us, which implies emotional tension and hypersensitivity reaction to the information we hear or read. As a result, it leads to even more conflict situations than at any times. School is a part of society. The school environment is exposed to conflict situations both coming from outside and arising inside the school activity (internal conflicts). The ability to find a solution to a conflict implies the mediation competence of a school environm

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Farris, T. N., and S. Chandrasekar. "Wear Mechanisms in Ceramic Machining." Applied Mechanics Reviews 47, no. 6S (1994): S204—S208. http://dx.doi.org/10.1115/1.3124408.

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Ceramic materials are finished primarily by abrasive machining processes such as grinding, lapping, and polishing. In grinding, the abrasives typically are bonded in a grinding wheel and brought into contact with the ceramic surface at relatively high sliding speeds. In lapping and polishing, the ceramic is pressed against a polishing block with the abrasives suspended in between them in the form of a slurry. The material removal process, here, resembles three body wear. In all of these processes, the mechanical action of the abrasive can be thought of as the repeated application of relatively

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Deyneko, I. V., I. V. Lukashova, and I. V. Skydan. "Development of officials of spatial orientation in training young football players." Scientific Journal of National Pedagogical Dragomanov University. Series 15. Scientific and pedagogical problems of physical culture (physical culture and sports), no. 10(170) (October 20, 2023): 63–67. http://dx.doi.org/10.31392/npu-nc.series15.2023.10(170).14.

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Despite the introduction of the latest methods of training in football, the direction - tactical thinking remains in the sphere of constant attention and innovation. The choice of tactical solutions, keeping in mind the elements of a tactical task, timely focusing on actions and changes on the field today are the decisive factors for victory in football. Game activity in conditions of a sharp time limit encourages the player to use the skills of so- called panoramic orientation. Spatial orientation exercises are combined with both life-kinetics exercises and spatial thinking exercises, creatin

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Romaniuk, V., and S. Fedorchuk. "Fight or flight mechanism and sports activities: psychophysiological aspects." European Psychiatry 66, S1 (2023): S622. http://dx.doi.org/10.1192/j.eurpsy.2023.1294.

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IntroductionSpecialists in biology, medicine, and psychology need to pay special attention to theoretical and practical research on the implementation of the fight or flight mechanism in humans in conditions of war and hostilities. Adaptation mechanism of fight or flight is related to individual and social forms of behavior among people and animals, and is aimed at the homeostasis preservation in difficult living conditions. The evolutionary fight or flight mechanism in the functional connection with stress as a general adaptation syndrome and stress reactivity has individual features due to t

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Chumachenko, A. Yu, and Е. G. Redka. "Ultrastructural Changes in Pineal Cells of the Epiphysis during Long Exposure of Drinking Water Nitrates and Correction Means." Ukraïnsʹkij žurnal medicini, bìologìï ta sportu 6, no. 2 (2021): 249–57. http://dx.doi.org/10.26693/jmbs06.02.249.

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According to modern data, the epiphyse (pineal gland) is an organ that combines the processes of adaptogenesis and immunogenesis, takes part in triggering stress reactions and determines the sequence of disorders in the body at different stages of stress development. Researchers consider the pineal gland to be the most important organizer of biological rhythms associated with photoperiodism and the organ that determines the stereotype of the organism. Its individual functions are rhythmically variable under the influence of the environment and age. The purpose of the study was to study the str

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Rashchenko, Andrii, Tetiana Dyptan, and Artur Malaman. "Activation of man-made processes in the event of a sharp change in the level of reservoirs and groundwater due to man-made disasters of hydraulic structures." Bases and Foundations, no. 46 (June 26, 2023): 123–32. http://dx.doi.org/10.32347/0475-1132.46.2023.123-132.

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There are more than 1,100 reservoirs on the territory of Ukraine, which hold about 55.13 km3 of water for the production of electricity, providing water to the population of Ukraine, shipping and fisheries: 43.71 km3 of the Dnipro cascade of reservoirs (including 18.2 km3 of the Kakhov reservoir); 3 km3 Dniester; 8.42 km3 - others. However, in parallel with hydraulic construction and operation of reservoirs, there are problems of preserving ecological balance in nature, as well as complex use of newly formed water bodies and territories bordering them and falling under their influence. The Kak

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Lykholat, Y. V., N. O. Khromykh, L. V. Shupranova, T. V. Legostaeva, T. Y. Lykholat, and A. V. Onopa. "Dynamics of protection antioxidant system of representatives of Amelanchier Medik. genus during ontogenesis under Steppe Pridniprov’e conditions." Ecology and Noospherology 29, no. 1 (2018): 3–7. http://dx.doi.org/10.15421/031801.

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Antioxidant reaction in leaves of the representatives of Amelanchier Medik. genus introduced in Steppe Pridniprov’e during vegetative period is studied. Activity of bensidin-peroxidase (BPOD), guaiacol-peroxidase (GPOD) and catalase (CAT) in leaves of four kinds Amelanchier Medik is analysed. Specific features of dynamics of enzymes activity in leaves of representatives of Amelanchier Medik. genus are defined according to phases of seasonal development and in reply to action of hydrothermal stress. On the basis of the received results the wide range of interspecific variability of enzymes acti

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Li, Hui, Chungying Li, Yuanpeng Qiao, et al. "Preparation of in-situ ZrB2/A356 composites and high-temperature tribological studies." Materials Research Express 9, no. 4 (2022): 046508. http://dx.doi.org/10.1088/2053-1591/ac62b6.

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Abstract The ZrB2/A356 composite material was prepared by using chemical in situ reaction technology. The high-temperature friction and wear test of ZrB2/A356 aluminum matrix composites was carried out. The friction and wear test temperatures were normal temperatures, 50 °C, 100 °C, 150 °C, 200 °C, 250 °C, and 300 °C. XRD, TEM, SEM, and XPS were used to analyze the microstructure, phase and the formation of surface compounds of the composites under different wear temperatures. The results show that the composite phase is composed of ZrB2 and ɑ-Al, and there is a small amount of Al-Si eutectic

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Kim, Jun-Sub, and Ssang-Taek Steve Lim. "LED Light-Induced ROS Differentially Regulates Focal Adhesion Kinase Activity in HaCaT Cell Viability." Current Issues in Molecular Biology 44, no. 3 (2022): 1235–46. http://dx.doi.org/10.3390/cimb44030082.

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In this study, changes in cell signaling mechanisms in skin cells induced by various wavelengths and intensities of light-emitting diodes (LED) were investigated, focusing on the activity of focal adhesion kinase (FAK) in particular. We examined the effect of LED irradiation on cell survival, the generation of intracellular reactive oxygen species (ROS), and the activity of various cell-signaling proteins. Red LED light increased cell viability at all intensities, whereas strong green and blue LED light reduced cell viability, and this effect was reversed by NAC or DPI treatment. Red LED light

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Maass, Martina, Benjamin Krausgrill, Simon Eschrig, et al. "Intramyocardially Transplanted Neonatal Cardiomyocytes (NCMs) Show Structural and Electrophysiological Maturation and Integration and Dose-Dependently Stabilize Function of Infarcted Rat Hearts." Cell Transplantation 26, no. 1 (2017): 157–70. http://dx.doi.org/10.3727/096368916x692870.

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Cardiac cell replacement therapy is a promising therapy to improve cardiac function in heart failure. Persistence, structural and functional maturation, and integration of transplanted cardiomyocytes into recipients' hearts are crucial for a safe and efficient replacement of lost cells. We studied histology, electrophysiology, and quantity of intramyocardially transplanted rat neonatal cardiomyocytes (NCMs) and performed a detailed functional study with repeated invasive (pressure–volume catheter) and noninvasive (echocardiography) analyses of infarcted female rat hearts including pharmacologi

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Parma, Roman. "THE IMPACT OF THE STATE POLICY OF RESTRICTIONS DURING THE “FIRST WAVE” OF THE COVID-19 PANDEMIC ON PUBLIC MOODS OF RUSSIAN CITIZENS." Political Science (RU), no. 3 (2022): 203–31. http://dx.doi.org/10.31249/poln/2022.03.10.

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The article discusses the attitude of citizens to the regime of restrictions to overcome the COVID-19 pandemic. In a review of current research, the pandemic is a factor of uncertainty that creates anxiety in society. In turn, the restrictions imposed by the authorities to overcome the pandemic are causing public tension. Under the influence of epidemiological and administrative factors, society is plunging into a state of stress and fragmentation, which accelerates the reorganization of the existing order. The focus of the study is the dynamics of the attitude of Russian citizens to the COVID

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Childs, D. W. "Fluid-Structure Interaction Forces at Pump-Impeller-Shroud Surfaces for Rotordynamic Calculations." Journal of Vibration and Acoustics 111, no. 3 (1989): 216–25. http://dx.doi.org/10.1115/1.3269845.

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Governing equations of motion are derived for a bulk-flow model of the leakage path between an impeller shroud and a pump housing. The governing equations consist of a path-momentum, a circumferential-momentum, and a continuity equation. The fluid annulus between the impeller shroud and pump housing is assumed to be circumferentially symmetric when the impeller is centered; i.e., the clearance can vary along the pump axis but does not vary in the circumferential direction. A perturbation expansion of the governing equations in the eccentricity ratio yields a set of zeroth and first-order gover

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Churchill, Thomas A., and Kenneth B. Storey. "Metabolic responses to dehydration by liver of the wood frog, Rana sylvatica." Canadian Journal of Zoology 72, no. 8 (1994): 1420–25. http://dx.doi.org/10.1139/z94-188.

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The metabolic responses by the liver to the evaporative loss of up to 60% of total body water were quantified in spring-collected wood frogs, Rana sylvatica, a freeze-tolerant species. Dehydration stimulated rapid hyperglycemia, liver glucose levels rising 3.8-fold to 90 nmol/mg protein (9.9 μmol/g wet mass) by the time that 10% of total body water had been lost. Glucose accumulation occurred at the expense of liver glycogen reserves, which fell over the course of dehydration, and was supported by a 5.8-fold increase in the activity of glycogen phosphorylase a in the liver, made up of increase

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Yaglova, Nataliya V., Sergey S. Obernikhin, Ekaterina P. Timokhina, et al. "Effects of Deuterium Depletion on Age-Declining Thymopoiesis In Vivo." Biomedicines 12, no. 5 (2024): 956. http://dx.doi.org/10.3390/biomedicines12050956.

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The thymus provides maturation and migration of T cells to peripheral organs of immunity, where they recognize diverse antigens and maintain immunological memory and self-tolerance. The thymus is known to be involved with age and in response to stress factors. Therefore, the search for approaches to the restoration of thymopoiesis is of great interest. The present investigation was aimed at evaluating how prolonged deuterium depletion affects morphogenetic processes and the physiological transition of the thymus to age-related involution. The study was performed on 60 male Wistar rats subjecte

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