Kharkiv State University of Food Technology and Trade

Business leadership driven by sustainability certifications has become a critical approach for signaling environmental responsibility and building customer trust in the hospitality industry. However, their effectiveness in enhancing guest satisfaction remains poorly understood, particularly regarding whether the quantity of certification or specific credential types drives positive outcomes. This study examines the relationship between sustainability certifications, customer trust, and satisfaction among certified hotels and resorts in Türkiye’s Mediterranean region, a destination experiencing significant environmental pressures and intense tourism competition. The research analyzes 95 eco-certified properties across 15 districts during June 2025, selected through purposive sampling to ensure representation of diverse certification types and hotel characteristics. Customer satisfaction data were aggregated from three major digital platforms (Booking.com, Google Reviews, and TripAdvisor) providing a comprehensive multi-platform assessment of guest perceptions. The study employs ordinary least squares regression analysis to test hypotheses derived from signaling theory, examining both cumulative certification effects and individual credential impacts while controlling organizational and locational factors. Results reveal that the quantity of certifications shows no significant association with customer satisfaction, challenging the assumption that cumulative signalling effects are present. However, internationally recognized certifications (Green Key, Travelife for Accommodation, and LEED) demonstrate statistically significant positive associations with guest ratings, while regional mandatory programs show no measurable impact. Review volume emerges as the strongest predictor of satisfaction scores, indicating that operational excellence and guest engagement outweigh formal credentials. These findings provide actionable insights for business leadership in hotel managers developing certification strategies, policymakers promoting sustainable tourism, and certification bodies seeking to enhance program effectiveness through transparency-focused business leadership and trust-building mechanisms in competitive hospitality markets.

The object of the study is the properties of a biopolymer system for prolonged delivery of cosmeceutical active ingredients based on natural polysaccharides (sodium hyaluronate and chitosan). The work solves the problem of the lack of a methodology for predicting the properties of a biopolymer system at the design stage. This methodology should link its component composition with functional and structural-mechanical characteristics. The optimization criterion should be achieving a controlled release profile of the hydrophilic active (dexpanthenol) without an initial "explosive" effect. It was established that the optimal ratio is 2.5% sodium hyaluronate and 1.2% chitosan, which ensures the release of 30–35% of dexpanthenol in 6 hours and 60–65% – in 24 hours. Structural and mechanical analysis confirmed the formation of a stable gel with a viscosity of 9800 ± 250 mPa·s and a storage modulus of 325 Pa. This is explained by the formation of a dense polyelectrolyte network due to electrostatic interactions between the anionic groups of sodium hyaluronate. The results of the study of the biopolymer system include the development of approximation models. These models predict the release profile of dexpanthenol based on the concentration of polymers and evaluate the structural and mechanical properties of the biopolymer system. The results obtained can be used in the cosmeceutical industry to create gel products with prolonged action. The effectiveness of the system was confirmed in vitro in phosphate buffer solution (pH 7.4; 37°C). The criterion for effectiveness was the achievement of a controlled release profile: 30–35% of the active substance in 6 hours and 60–65% in 24 hours, which provides a long-term effect without an initial “explosive” effect

МОТИВАЦІЙНІ МЕХАНІЗМИ ФОРМУВАННЯ ТА РОЗВИТКУ КОМУНІКАТИВНОЇ КУЛЬТУРИ ФАХІВЦІВ

Standard raw materials for growing sprouts are alfalfa, broccoli, mung bean, and radish sprouts. The research uses vetch (Vicia sativa L.) beans, which have small seeds (45– 60 g per 1000 seeds) and are suitable for replacing standard raw materials. Bean sprouts have high nutritional value and are beneficial for human health. However, the germination of bean sprouts is associated with large losses of seed material due to salt stress, and the sprouts themselves have a short shelf life because the growing conditions contribute to their contamination by microorganisms. The results of this study showed that nanosized chitosan significantly reduces the effect of salt stress on the germination of vetch (Vicia sativa L.) bean sprouts, and plasma-activated water reduces the number of microbes on the vetch bean sprouts. Nanochitosan has played an important role as a potential priming agent used in Solid Matrix Priming on saline soils. Nanochitosan has been shown to improve germination and stress resistance caused by soil salinity. Cleaning with plasma-activated water can effectively deactivate bacteria, yeast, and mold on vetch bean sprouts in a time-dependent manner. The combination of plasma-activated water and priming agents (nanochitosan) showed an effective result, which increased the physicochemical parameters of vetch bean sprouts and reduced the number of plasma- activated water treatments to significantly reduce microbiological activity on vetch bean sprouts. Nanochitosan priming and plasma-activated water increased yield and the possibility of efficient cultivation at high salinity, improved microbiological indicators and increased protein content in 92.7% of vetch bean sprouts at maximum salinity (8dS/m). For nutrition, vetch bean sprouts can be used both fresh and dried. The vetch sprouts obtained with the use of nanochitosan and plasma-activated water are suitable for the production of diet and dried food according to their quality and microbiological indicators, which should be the focus of further research.

Метою роботи було визначення впливу гліцерину TM BASF, меду соняшникового та порошку кунжутного TM "Korysne Boroshno" на стан води у гелевих системах на основі агару 1200 ТМ "Fujian Province" для виробництва желейних батончиків. Дослідження проводили із застосуванням інфрачервоної спектроскопії на Фурьє-спектрометрі Perkin-Elmer Spectrum One FTIR Spectrometer. Було встановлено, що процес гелеутворення в системі «агар-вода-гліцерин» супроводжується перерозподілом асоційованих і неасоційованих груп ОН, збільшенням кількості асоційованих гідроксилів та адсорбційнозвязаної води, що підтверджується появою у ІЧ спекрі широкої інтенсивної смуги поглинання в області 3700–2600 см–1 характерної для валентних коливань ОН-групи. Додавання меду до гелевої системи призводить до зміни інтенсивності смуги валентних коливань зв’язку С–С у вуглеводах меду (при 1245 см–1) та зміщення її у бік вищих частот порівняно з гелем «агар-вода-гліцерин», що підтверджується наявністю смуги поглинання в області 1200–700 см–1. Також дані спектроскопії показали, що додавання кунжутного порошку при виготовленні гелю на основі агару, знизило інтенсивність валентних коливань ОН групи води (2151 cm–1), а також призвело до зсуву інтенсивної широкої смуги у бік вищих частот порівняно з гелями без кунжуту (2139 см–1).

We believe that unmodified hydrated C60 fullerene (C60FWS) and nanocrystalline cerium dioxide (NCD) are promising for biological research. It is knowns that these nanoparticles protect living cells from damaging environmental factors such as radioactive and ultraviolet radiation, temperature, hypoxia, toxic substances, etc. However, little attention has been paid in scientific reports to the use and study of these nanoparticles as possible adaptogens. In our studies, we tried to protect the culture of cyanobacteria Spirulina platensis with C60 and NCD from adverse conditions. The choice of Spirulina platensis is due to its sensitivity to adverse environmental factors. The results obtained show that the absence of toxic effects of C60 and NCD of selected concentrations on the Spirulina platensis culture has been found. Nanoparticles C60 and NCD maintained the culture of Spirulina platensis for at least 4 weeks in the absence of nutrients, light, low pH storage conditions and low temperature. Cyanobacteria stored for 1–4 weeks in distilled water with nanoparticles showed increased proliferative activity compared to samples stored at the same time in the standard Zarrouk’s nutrient medium. Keywords: fullerene C60, nanocrystalline cerium dioxide, Spirulina platensis, adaptogens.

АДАПТАЦІЯ СТУДЕНТІВ ДО УМОВ ДИСТАНЦІЙНОГО НАВЧАННЯАнотація.Сучасна освіта сьогодні передбачає введення дистанційного навчання у закладах вищої освіти по усьому світу.Це робиться з метою забезпечити студентів безперервним навчанням в умовах пандемії COVID-19

Small businesses in any country remain an essential link in maintaining the level of competition.Thus, it remains relevant to consider the possibilities of small business development in the economy of any state.This work focuses on the financial and managerial components of such enterprises in Ukraine.The purpose of the study is to assess the methods of financial control and management of small business enterprises in Ukraine, as well as to consider the features of small business development in Ukraine and the Kharkiv region in particular.The primary method for writing the paper was the method of analysis, given a large number of different types of data processed by the authors.During the writing of the work, it was concluded that in Ukraine, financial control in small enterprises plays a unique role in the possibility of further functioning of the enterprise.This is due to a significant number of problems in the country's economy, as well as difficulties that exist in doing business.In work, two models were built that characterize the methods of conducting financial control in the management of the enterprise: column-shaped and spiral-shaped.In addition, the work analyzes the international experience of studying financial control systems in small business companies, which once again confirms the role of financial control in improving their financial results.

Purpose. The aim of the article is substantiation of the methodology of strategic management of risk resistance of a retail enterprise. Methodology of research. The works of domestic and foreign scientists on strategic risk management in the enterprise are the theoretical and methodological basis of the study. The tasks set in the work were solved using the following methods: analysis and generalization - when analysing models of strategic risk management; a systematic approach, an abstract and logical one - when determining the main stages of strategic management of the risk resistance of a retail enterprise, developing a “bow tie” diagram for assessing the risks of a retail enterprise; economic and mathematical modelling - when developing a tuple of structural elements of an information system for managing the risk resistance of a retail enterprise. Findings. Scientific approaches to the formation of a strategic enterprise risk management system were studied. The key aspects of the methodology “Risk management of the organization. Integrated Model” were considered. A PPRR-model of strategic management of the risk resistance of a retail enterprise was developed. The main stages of strategic management of the risk resistance of a retail enterprise are determined. A tuple of structural elements of the information system for managing the risk resistance of a retail enterprise was formed. A methodical approach to the construction of a “bow tie” diagram for risk assessment of a retail enterprise is substantiated. This approach takes into account the relationship between the sources of risk and the consequences of its implementation. Originality. An organizational and methodological approach to the formation of a strategic management system for the risk resistance of a retail enterprise has been developed, unlike existing ones, it creates the opportunity to quickly and timely respond to changes in the external environment, identify sources of risk, establish cause-and-effect relationships between risk factors and its consequences, analyse and prove relevant information at risk for strategic decision makers. Practical value. Practical implementation of the results of the study lies in the development of applied tools that can be used to make informed strategic decisions to mitigate the consequences of the onset of risk events, increase the level of risk resistance of retail enterprises under resource and time constraints, while contributing to the achievement of the set targets for the activities of a trading enterprise. Key words: risk, risk resistance, strategic management, PPRR model, information system, assessment, “bow tie” diagram.

The study aimed to determine the impact of different farming practices (organic and intensive) on the dynamics of potential biological activity of typical chernozem (mollisol). Comparative-profile-genetic, microbiological and mathematical-statistical methods were used for the research. The data obtained during the study of soil biological activity for 2018–2020 were analyzed. The highest popu-lation density of Collembola was observed in the variant of fallow soil in the layer of 10–20 cm (111 indiv. dm3 –1) with the lowest amount of Oribatida (32 indiv. dm3 –1). Under conditions of agrogenic use of soils, the predominance of Oribatida over Collembola was recorded. When using green manure in a soil layer of 0–10 cm, the number of Oribatida is 125 indiv. dm3 –1, while Collembola – 50 indiv. dm3 –1. Agrogenic use of chernozems reduces the number of microscopic fungi. The intensive farming system is the reason for the decrease in the number of all ecological and trophic groups of microorganisms in the 0–10 cm layer while increasing their number in the layer of 20–30 cm. Variants of the organic system of agriculture, especially with the use of green manure, contribute to the increase in the number of actinomycetes and amylolytic microbiota, as well as a short-term sharp increase in the number of oligonitrophilic microbiota. Agricultural use of soils reduces the activity of enzymes such as invertase, protease, dehydrogenase and cellulase. However, the activity of urease and catalase – increases in the soils of the organic system of agriculture. Discriminant analysis of biological activity identified three groups of soils, corresponding to different farming systems. This confirms the possibility of using the studied indicators for soil biodiagnostics.