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174 results on '"Osadchuk M."'

1. Analytic reconstruction of some dynamical systems

Author

Gorodetskyi, V. and Osadchuk, M.

Subjects
Nonlinear Sciences - Chaotic Dynamics, Physics - Data Analysis, Statistics and Probability, 34C15, 34C28
Abstract

We propose a reconstruction of the initial system of ordinary differential equations from a single observed variable. The suggested approach is applied to a certain class of systems which includes, in particular, the Rossler system and other chaotic systems. We develop relations and a method to pass from a model that involves the observable and its time derivatives to a real original system. To this end, we first find a set of candidates of the system in an analytic way. After that, by additionally studying the system, we make a choice for the sought system., Comment: Corrected references

Published
2013
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2. Post-Covid Conditions and their Effects on the Cardiovascular Syst.

Author

Osadchuk, M., Kolesnikova, I., Zakharova, L., Nagibina, J., and Kubareva, M.

Subjects
COVID-19 pandemic, WASTE management, CARDIOVASCULAR system, MYOCARDITIS, ISCHEMIA, HEART failure
Abstract

Background. Rising global concerns about COVID-19 recently gained more research attention due to the ease of person-to-person transmission, various symptoms after healing, and the shortage of effective antiviral therapy. The study aims to analyze post-COVID conditions and clinical manifestations of cardiovascular lesions in patients recovering from COVID-19 infection. Methods. A practical examination of post-COVID conditions manifestation was conducted in a prospective cohort study, involving 250 patients diagnosed with COVID-19 between June 1, 2021, and August 31, 2021. The study specifically focused on analyzing the cardiovascular effects of COVID-19, utilizing data from a subgroup of 200 patients previously discharged from the hospital with elevated troponin levels. The cardiovascular variables assessed included tachy-cardia, ischemia, heart attack, myocarditis, hypertension, blood clots, and heart failure. Results. It has been observed that among surviving patients, the following symptoms persisted: anosmia/ageusia (59%), severe dyspnea (36.7%), palpitations and complaints related to the cardiovascular system (15.8%), headaches (13.2%), arthralgia (11.7%), myalgia (9.8%), and hair problems (≥5%). By the 60th day, a reduction in symptoms by 5-10% was noted, and by the 90th day, a decrease in activity by 25-35% was observed. Patients aged 40-60 years exhibited the highest percentage of cardiovascular diseases (75%). Conclusions. Consequently, the SARS-CoV-2 virus underscores the critical importance of cardiological attention in patient care. Cardiac screening results in individuals with COVID-19 reveal a significant prevalence of serious heart problems, affecting over half of the patients. This emphasizes the necessity for heightened vigilance and specialized cardiac care when managing patients with COVID-19. [ABSTRACT FROM AUTHOR]

Published
2024
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3. THE HISTORY OF PLANT BREEDING IN THE RUSSIAN FEDERATION.

Author

OSADCHUK, M. A., OSADCHUK, A. M., and TRUSHIN, M. V.

Subjects
*YEAST fungi, *IONIZING radiation, *NINETEENTH century, *TWENTIETH century, *SEED quality
Abstract

The beginning of organized breeding work in Russia concretized at the end of the 19th century in two capitals of the Russian Empire: in 1877 at St. Petersburg and in 1881 in Moscow, where seed quality control stations first opened. The stations' work transfer to scientific-based functions commenced in the first half of the 20th century by N.I. Vavilov. Under his leadership, the People's Commissariat of Agriculture of the RSFSR organized an extensive network of 115 breeding and experimental stations. The 20 to 30 years of the 20th century displayed epoch-making discoveries by Russian scientists in the field of genetics. In 1920, N.I. Vavilov discovered and formulated the law of homological series in hereditary variability. In 1925, pioneering worldwide, Russian scientists, under the influence of ionizing radiation, received mutations in yeast fungi. During the same years, S.S. Chetverikov and his students laid the foundation for evolutionary genetics, which became an impetus for developing the modern genetic breeding theory. Later, in the 1930s of the 20th century, A.A. Serebrovsky and N.P. Dubinin proved the divisibility of the gene and substantiated the theory of its complex structure. Based on this discovery, geneticists globally, studying the patterns of inheritance and variability, have discovered and continue to uncover new breeding means. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Comparative effectiveness of ursodeoxycholic acid preparations in the treatment of biliary sludge

Author

Butorova, L. I., primary, Ardatskaya, M. D., additional, Osadchuk, M. A., additional, Drobysheva, A. E., additional, Zagrebina, E. A., additional, Kadnikova, N. G., additional, Kalashnikova, M. A., additional, Lukianova, E. I., additional, Pavlova, L. N., additional, Plavnik, R. G., additional, Sayutina, E. V., additional, Topchiy, T. B., additional, Trunova, S. N., additional, Tuayeva, E. M., additional, and Shustova, N. U., additional

Published
2020
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