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 efficacy, which is consistent with the proposed hypothesis and is due to the high content of allicin — a biologically active compound with pronounced antimicrobial activity.
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 of physiological experiments. The survey results indicate a significant excess of the recommended time spent using electronic devices among the respondents (on average, 6–7 hours per day) and a high prevalence of vision problems (54.5 %). The hypothesis that adherence to visual hygiene practices and systematic eye exercises reduce the risk of progression of vision defects was confirmed during stud
The aim of this study was to evaluate the effect of FortiGest biostimulant and BIOXYMIN IFEED probiotic on meat productivity of Holstein bulls. The study was conducted from 2024 to 2025 at JSC Churachikskoe. Four groups of Holstein bulls, each with 10 animals, were formed: control, 1st (FortiGest), 2nd (BIOXYMIN IFEED) and 3rd (FortiGest + BIOXYMIN IFEED) experimental groups. FortiGest was administered intramuscularly three times at 3.0 ml, and BIOXYMIN IFEED was administered daily with the diet at 15 g/head. The animals were observed from birth to slaughter (14 months) and their zootechnical and slaughter characteristics were assessed. The combined use of FortiGest and BIOXYMIN IFEED (Group 3) significantly improved meat productivity. The slaughter weight of Group 3 bulls was 254.42 kg, exceeding the control by 15.49 kg (6.48%, P < 0.001), with a slaughter yield of 52.72% (+1.4%). The chilled carcass weight reached 242.10 kg (+14.5 kg, 6.4%, P < 0.01). The pulp weight increased to 194.20 kg (+15.2 kg, 8.5%, P<0.01), its yield was 80.25% (control 78.67%), while the weight of premium grade pulp reached 46.8 kg (+15.84%, P<0.01), first grade – 98.9 kg (+15.13%). The meatiness index increased to 4.63 (control 4.41, P<0.05). An increase in the weight of valuable cuts was noted: back breast by 6.22 kg (+9.13%), loin by 3.37 kg (+14.63%), hip by 5.70 kg (+7.67%). The use of FortiGest and BIOXYMIN IFEED effectively increases meat productivity of Holstein bulls, improving slaughter quality, carcass morphology and meat grade.
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 the polarity of the H₂O molecule, the developed network of hydrogen bonds, and the resulting physicochemical characteristics determine water’s indispensable role in physical, chemical, and biological processes.
The choice of the type of protective agent against corrosion of agricultural machinery parts is determined primarily by the safety of the protected surfaces during non-working periods and environmental safety when protective agents come into contact with them as a result of their operation: soil cultivation, sowing, planting, harvesting of agricultural crops, etc. Many anti-corrosion protection agents are known: restoration of initial paint and varnish coatings, use of temporary protective compounds (bitumen, oils, rust converters and corrosion inhibitors, in rare cases, PVC lubricants, inhibited compounds NG-204, NG-203, “Kormin”, water-wax compounds, etc. are used). The listed means have a number of disadvantages: high cost, high labor intensity of application and depreservation of protective, as well as negative environmental consequences. In connection with the above, the purpose of the work is to determine the anti-corrosion properties of rendered animal fats as relatively inexpensive and environmentally friendly materials. To achieve this goal, studies were carried out using samples of steel St.3, coated with rendered beef, horse and pork fats. The studied samples were pre-weighed, coated with the appropriate fats and placed under a canopy from November 2019 to September 2020. It should be noted that the preservation of the fat film depends on its thickness and weather and climatic conditions. During the observations, the preservation and condition of the coatings were monitored monthly, the mass of the samples was determined, and the moments of corrosion occurrence were recorded during daily inspection. The measurements showed the development of corrosion processes at negative temperatures (-4…-5°C) and relative air humidity within 75…85%. It should be noted that external manifestations of corrosion have been observed on unprotected samples since March. Samples with beef fat films show a threefold decrease in the corrosion rate compared to unprotected ones. No corrosion was observed on samples with pork and horse fat coatings.
