Mariia A. Frolova

In this study, we present the results of a comparative analysis of the antibacterial activity of aqueous extracts of common plants: garlic (Allium sativum), onion (Allium cepa), and horseradish (Armoracia rusticana). The aim of the study was to evaluate the phytoncidal properties of these plants in the context of searching for natural alternatives to synthetic antibiotics amid rising antibiotic resistance. The ability of phytoncides to inhibit the growth of bacterial test cultures on a nutrient medium has been experimentally confirmed. The garlic extract demonstrated the highest antibacterial...

The paper presents the results of a study examining the practices of using medicinal plants (chamomile, wormwood, dog rose, and hawthorn) among the population of the Chuvash Republic, as well as an assessment of respondents’ attitudes towards the independent harvesting of herbal raw materials and towards pharmaceutical forms. The aim of the study was to test the hypothesis that there is a high level of public trust in the healing properties of traditional medicinal plants and to identify the reasons for preferring purchased raw materials over self‑collected ones. The empirical part included an...

This study presents a comparative analysis of how sucrose (C 12 ​ H 22 ​ O 11 ​ ) concentration affects aqueous solution density, interpreting the data through biochemical and physical‑chemical mechanisms (hydration, hydrogen‑bond network rearrangement, osmotic effects); a direct correlation between sucrose concentration and density was confirmed, with the maximum density increase (1.280 g/cm³) observed at a 44.4 % mass fraction, reflecting solution structure compaction due to intermolecular interactions, and supporting the use of the areometric method for rapid carbohydrate concentratio...

The paper presents the results of a study on the physicochemical properties of water and their role in natural and biological systems. An analysis of the water molecule structure was carried out, and its key characteristics — high heat capacity and selective dissolving power — were demonstrated experimentally. The significance of these properties for stabilizing the environment and supporting vital functions was also assessed. The aim of the study was to demonstrate the fundamental importance of water’s anomalous properties, which are often perceived as commonplace. The results confirm that th...

The present study reports the results of quantitative determination of strontium in leaf samples of greater burdock (Arctium lappa L.) collected in the Chuvash Republic. The content of the target element was determined using X‑ray fluorescence spectrometry (XRF) with a Shimadzu EDX 7000 spectrometer, combined with the standard addition method. The strontium levels in the medicinal plant material were found to exceed the established regulatory limits by several times, indicating a potential environmental load on the collection area and underscoring the need to implement systematic quality contr...

This study presents a comprehensive assessment of the impact of acoustic noise on the psychophysiological state of humans through the integration of data from a theoretical analysis of scientific literature [1, 2, 3, 4] and the results of an empirical sociological survey. The sample consisted of 30 respondents aged between 11 and 70 years. It was found that 70 % of respondents subjectively assess the level of background noise in their everyday environment as high or very high. The dominant subjective reactions include irritability (56 %) and reduced concentration (32 %). Significant psychologi...

This study presents the results of a comparative analysis of the effects of acoustic stimuli on the psychophysiological state of domestic animals (dogs and cats). An experimental assessment was carried out of behavioral and physiological indicators — including rest/sleep duration, heart rate, and relaxation index — under the influence of various music genres and species‑specific compositions. The aim of the research was to test the hypothesis regarding the species‑specific nature of animal responses to music, depending on its acoustic parameters (tempo, frequency spectrum, and harmonic structu...

In this study, the results of an experimental assessment of the toxic effects of smoking products on model organisms are presented — larvae of the grey flesh fly (Sarcophaga carnaria), bloodworm (Chironomus), and Colorado potato beetle (Leptinotarsa decemlineata). It has been established that tobacco smoke, water‑soluble components of cigarette filters, and food treated with tobacco substances exert a pronounced toxic effect, leading to reduced activity, impaired development, and death of the larvae. The identified patterns confirm the high ecotoxicological hazard of tobacco smoke components a...

In this study, the results of investigating the reactivity of the human cardiovascular system are presented; they were obtained through a series of functional tests followed by mathematical processing of hemodynamic parameters. It has been established that different types of stressors (dynamic load, orthostatic test, cognitive stress) induce qualitatively distinct hemodynamic patterns. It was revealed that dynamic load primarily increases cardiac output, the orthostatic test activates baroreflex compensation, and cognitive stress provokes a pronounced pressor response due to an increase in per...

This study presents the results of a comparative analysis of the prevalence of vision defects and risk factors among students, as well as an experimental assessment of key parameters of the visual apparatus — the near point of clear vision and the area of the blind spot. The aim of the research was to evaluate the impact of increased visual load from digital devices on the visual health of young people and to test the effectiveness of simple physiological tests for the rapid assessment of certain visual functions. The practical component included a sociological survey of students and a series...