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Gdańsk University of Technology

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Publications from the year 2024

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  • Problematyka mycia elementów obrabianych po operacjach docierania jednotarczowego powierzchni płaskich
    • Adam Barylski
    2024 Dozór Techniczny

    W artykule omówiono wybrane zagadnienia mycia elementów po wykończeniowej obróbce ściernej luźnym ścierniwem. Przedstawiono technikę pooperacyjnego mycia ultradźwiękowego, czasochłonność oczyszczania drobnych elementów z ceramiki technicznej oraz skuteczność mycia ręcznego i ultradźwiękowego żeliwa sferoidalnego po docieraniu.

  • Problems of Measuring Gas Content in Oil in a Two-Phase Flow: A Review
    • Cezary Edling
    • Paweł Śliwiński
    2024 ENERGIES

    In view of the necessity of measuring the air content in oil in two-phase flows in the context of general industry, a review of the most popular methods of measuring the air content in oil was carried out. This review includes an assessment of their advantages and disadvantages and of whether they meet criteria such as the degree of filling, the size and number of bubbles, verification, the absence of additional pressure drops, simplicity, and repeatability. In the review, the following methods were examined: the classic trapping method, a modified trapping method, a trapping method using hydrostatic pressure loss, the pressure loss due to frictional flow resistance, the pressure loss with a rapid increase in diameter, the pressure drop in a Venturi tube, the pressure drop in an orifice, a method using the Coriolis effect, the electrical resistance method, the electrical conductivity method, the electromagnetic method, the electrical capacitance method, the thermal anemometry method, the liquid–solid contact electrification method, the photographic method, holography, light scattering, sound dispersion, the ultrasonic transit-time method, X-ray radiation, gamma radiation, neutron radiation, and fiber-optic methods.

  • Procedury diagnostyczne badania izolacji maszyn elektrycznych
    • Marek Olesz
    • Marcin Gulczyński
    • Marek Adamowicz
    2024 Full text Przegląd Elektrotechniczny

    Artykuł opisuje stosowane w praktyce procedury diagnostyki off-line dla silników elektrycznych niskiego i średniego napięcia. Poza pomiarem rezystancji izolacji do eksploatacji wprowadza się metody impulsowe z dodatkową rejestracją impulsów wyładowań niezupełnych. Analiza odpowiedzi izolacji na oscylacyjne przebiegi napięcia zasadniczo poprawia możliwość wykrywania wewnętrznych uszkodzeń - w tym między zwojowych – w układzie izolacyjnym, co przedstawiono dla omówionego przypadku silnika elektrycznego średniego napięcia.

  • Progress in ATRP-derived materials for biomedical applications
    • Mohsen Khodadadiyazdi
    • Payam Zarrintaj
    • Mohammad Saeb
    • Masoud Mozafari
    • Sidi A. Bencherif
    2024 PROGRESS IN MATERIALS SCIENCE

    The continuing wave of technological breakthroughs and advances is critical for engineering well- defined materials, particularly biomaterials, with tailored microstructure and properties. Over the last few decades, controlled radical polymerization (CRP) has become a very promising option for the synthesis of precise polymeric materials with an unprecedented degree of control over mo lecular architecture. Atom transfer radical polymerization (ATRP), one of the most robust and efficient CRPs, has been at the forefront of the synthesis of well-defined polymers with controlled/ predetermined molecular weights, polydispersity, topology, composition, and site-specific func tionality. ATRP has been leveraged to prepare a wide range of polymers with properties tailored for a number of biomedical applications. Furthermore, ATRP can also be utilized to introduce stimuli-responsive properties into the chemical structure of polymers. Moreover, the degradation behavior of ATRP-derived polymers can be tailored by incorporating chemical bonds susceptible to hydrolysis or proteolysis. This strategy allows the design of degradable polymers for in vivo applications. This review summarizes the recent advances in ATRP for the design of functional materials and techniques implemented to advance the biomedical field, such as surface modifi cation and functionalization. Additionally, the latest applications and progress of ATRP-derived materials in various biomedical arenas such as drug delivery, tissue engineering, bioimaging, and biosensing are reported. Lastly, the current limitations and future perspectives of ATRP- derived biomaterials are carefully discussed to support further improvement of their properties and performance for translatability into the clinic. Moving forward, there is a need for further development of ATRP to align with green chemistry principles. This entails exploring the use of renewable monomers, environmentally friendly and nontoxic solvents, as well as metal-free and biocompatible catalysts. Additionally, researchers should thoroughly investigate the bioactivity, biodegradation behavior, and in vivo fate of ATRP-derived polymers and polymer conjugates before considering their translation into clinical applications

  • Progress in module design for membrane distillation
    • Aamer Ali
    • Mohammad Mahdi Agha Shirazi
    • Lebea Nthunya
    • Roberto Castro Munoz
    • Norafiqah Ismail
    • Naser Tavajohi
    • Guillermo Zaragoza
    • Cejna Anna Quist-Jensen
    2024 Full text DESALINATION

    There have been tremendous advances in membrane distillation (MD) since the concept was introduced in 1961: new membrane designs and process configurations have emerged, and its commercial viability has been evaluated in several pilot-scale studies. However, its high energy consumption has hindered its commercialization. One of the most promising ways to overcome this obstacle is to develop more energy-efficient membrane modules. The MD research community has therefore developed diverse new module configurations for hollow fiber and flat sheet membranes that increase the thermal energy efficiency of MD by minimizing thermal polarization, increasing mass transfer across the membrane, and improving heat recovery from the condensed vapor. This review summarizes the progress made in the design of hollow fiber and flat sheet membrane modules for MD applications. It begins with a brief introduction to MD and its configurations before describing developments in module fabrication and highlighting key areas where further research is needed.

  • Properties of some fruit wines
    • Kim Mo Young
    • Martyna Lubinska-Szczygeł
    • Martin Polovka
    • Bianka Tobolkova
    • Pitipong Thobunluepop
    • Yong Seo Park
    • Kyung Sik Ham
    • Yang Kyun Park
    • Seong Gook Kang
    • Dinorah Barasch
    • Alina Nemirovski
    • Shela Gorinstein
    2024 Full text EUROPEAN FOOD RESEARCH AND TECHNOLOGY

    Recently wereported about theconsumption of redwines fromgrapes, havingseveral health properties. Thereare different types of wines that originated fromgrapesand other fruits. In the present study fruit wines frompersimmon, kiwifruit and pomegranatewereinvestigated and compared for theirantioxidant ability, usingcupricion reducingantioxidant capacity (CUPRAC)and the 2,2-diphenyl-1-picrylhydrazyl (DPPH)assays. To thefruit wines wereapplied thesamemethods of investigation as to thetraditional ones madefromgrapes. Theresults showed the highest antioxidant activity of pomegranate, followed by kiwifruit and persimmonwines. Fourier transforminfrared (FTIR)spectroscopy was used in order to correlatetheseresults. Theinteraction of wine bioactivecompounds with themain serumproteins in the humanmetabolism, such as human serumalbumin (HSA), globulin (GL),and fibrinogen (FB), showed that pomegranatewine possesses higher quenchingproperties than kiwifruit and persimmonwines. All determined fluorescenceindices havea direct correlationwith the bioactivity of polyphenolsand not with thecontent ofalcohol. We hypothesizethat theresults of theinteraction ofmain human serumproteins with bioactivecompounds of wines can beadditional predictors

  • Proposed concept for the development of residential floating facilities
    • Emilia Miszewska
    • Maciej Niedostatkiewicz
    • Radosław Wiśniewski
    2024 Full text Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

    Currently, a dynamic growth of interest in residential buildings located on the water can be observed in Poland. However, the lack of legal regulations, the increase in society's affluence and overpopulation in city centers lead to reflection on the development strategy that should be implemented for maritime construction. The publication presents a proposal of four development strategy concepts: aggressive, conservative, competitive and defensive, developed for floating homes (FHs) based on the authors' own research. The strategy concept that, in the authors' opinion, should be implemented was indicated using the TOWS-SWOT analysis. A detailed analysis revealed that the strategy that obtained the highest result in the study was the aggressive strategy

  • Proteases immobilized on nanomaterials for biocatalytic, environmental and biomedical applications: Advantages and drawbacks
    • Muhammad Bilal
    • Sarmad Ahmad Qamar
    • Diego Carballares
    • Ángel Berenguer-Murcia
    • Roberto Fernandez-Lafuente
    2024 Full text BIOTECHNOLOGY ADVANCES

    Proteases have gained significant scientific and industrial interest due to their unique biocatalytic characteristics and broad-spectrum applications in different industries. The development of robust nanobiocatalytic systems by attaching proteases onto various nanostructured materials as fascinating and novel nanocarriers has demonstrated exceptional biocatalytic performance, substantial stability, and ease of recyclability over multiple reaction cycles under different chemical and physical conditions. Proteases immobilized on nanocarriers may be much more resistant to denaturation caused by extreme temperatures or pH values, detergents, organic solvents, and other protein denaturants than free enzymes. Immobilized proteases may present a lower inhibition. The use of non-porous materials in the immobilization prevents diffusion and steric hindrances during the binding of the substrate to the active sites of enzymes compared to immobilization onto porous materials; when using very large or solid substrates, orientation of the enzyme must always be adequate. The advantages and problems of the immobilization of proteases on nanoparticles are discussed in this review. The continuous and batch reactor operations of nanocarrier-immobilized proteases have been successfully investigated for a variety of applications in the leather, detergent, biomedical, food, and pharmaceutical industries. Information about immobilized proteases on various nanocarriers and nanomaterials has been systematically compiled here. Furthermore, different industrial applications of immobilized proteases have also been highlighted in this review.

  • Proyecto Valija
    • Dominika Krechowicz
    2024

    Projekt "Walizka", koncepcja: prof. dr hab. Zbigniew Szot Uniwersytet Artystyczny w Poznaniu, Wydział Malarstwa i Rysunku. W projekcie wzięło udział 46 artystów z Polski oraz z Czech, Niemiec, Gruzji, Japonii. Koncepcja projektu dotyczy szeroko pojętego tematu podróży. W obecnych czasach zagrożenia COVID-19 słowo „podróż” zaczyna nabierać zupełnie innego znaczenia. Żyjąc i tworząc w izolacji od wielu miesięcy, została stworzona wspólnie autonomiczna kolekcja prac, dedykowanych tylko tej walizce, która teraz jest wysyłana w podróż. Prace i walizka stanowią nierozłączną całość. Koncepcją projektu jest zaprezentowanie prac w wybranych miejscach oraz pozostawienie swojego znaku na wieku walizki. Wystawa została zaprezentowana w Palacio de Colomina, siedzibie Uniwersytetu CEU im. Kardynała Herrery w Walencji w Hiszpanii. Termin realizacji: 29.10.2024 do 28.11.2024.

  • PRZEBUDOWA MOSTU SKŁADANEGO MS 22-80 NA MOST Z PRZĘSŁEM ZWODZONYM
    • Andrzej Ambroziak
    • Maciej Malinowski
    • Mirosław Wałęga
    2024

    The structural analysis of a road foldable prefabricated steel Bailey-type bridge located over the Tuga River in Żelichowo, Poland is investigated in the paper. Interesting and untypical bridge redevelopment performed made a possibility to lift the middle foldable bridge span by 4.0 m concerning the existing state. This paper can provide engineers and designers basis for structural analysis in the field of foldable Bailey-type bridge constructions.

  • Przedawaryjny stan techniczny estakady suwnicy pomostowej o udźwigu 20 ton po wieloletnim okresie użytkowania
    • Tomasz Majewski
    • Maciej Niedostatkiewicz
    2024

    W artykule opisano stan przedawaryjny konstrukcji nośnej estakady suwnicy pomostowej, po 49 latach jej eksploatacji. Estakada suwnicy nie stwarzała bezpośredniego zagrożenia bezpieczeństwa konstrukcji oraz bezpieczeństwa użytkowania, jednak z uwagi na wieloletni okres eksploatacji, który w praktyce inżynierskiej przyjmowany jest domyślnie jako projektowany okres trwałości, konieczne było wykonanie kompleksowej i szczegółowej kontroli jej stanu technicznego suwnicy oraz szczegółowej oceny stanu technicznego wszystkich jej elementów konstrukcyjnych pod kątem dopuszczenia jej do dalszej eksploatacji. W artykule opisano zaproponowane i zrealizowane rozwiązania, których celem było doprowadzenia przedmiotowej estakady do właściwego stanu technicznego, umożliwiającego dalszą bezpieczną eksploatacje suwnicy pomostowej jako urządzenia.

  • Przegląd metod wyznaczania parcia mieszanki betonowej na deskowanie
    • Andrzej Ambroziak
    2024 Przegląd Budowlany

    W pracy poruszono tematykę wyznaczania parcia mieszanki betonowej na deskowanie. Zebrano i opisano wybrane cztery modele stosowane do wyznaczania rozkładu ciśnienia poziomego świeżej mieszanki betonowej oddziaływującej na deskowanie. Dokonano krótkiego przeglądu literatury z zakresu omawianej tematyki parcia mieszanki betonowej na deskowanie.

  • Przekształtnik DC-DC 24V/12kV z transformatorem macierzowym do ładowarek kondensatorów wysokonapięciowych HVCC
    • Marek Adamowicz
    • Jędrzej Pietryka
    • Zbigniew Krzemiński
    2024 Full text Przegląd Elektrotechniczny

    W artykule przedstawiono projekt i wykonanie kompaktowej, przenośnej wysokonapięciowej ładowarki kondensatorów 12kV, 1kJ/s, zasilanej z baterii akumulatorów 24V. Podstawowym wyzwaniem zaprojektowania przekształtnika o tak wysokiej przekładni transformatora jest minimalizacja indukcyjności rozproszenia transformatora, która wpływa na ograniczenie mocy przenoszonej przez transformator, a tym samym uniemożliwia regulację prądu i napięcia strony wtórnej przekształtnika. Przekształtnik DC-DC ładowarki wykorzystuje transformator macierzowy wysokiej częstotliwości o wspólnym uzwojeniu pierwotnym i 16 uzwojeniach wtórnych, z których 14 jest połączonych z mostkami prostowniczymi, a dwa stanowią uzwojenia pomocnicze. Szeregowo połączone wyjścia mostków prostowniczych tworzą wysokonapięciowe wyjście ładowarki.

  • Przestrzenne rozwinięcia chmur punktów. Podstawy teoretyczne oraz przykłady aplikacyjne
    • Paweł Dąbrowski
    2024

    Przedmiotem monografii są przestrzenne rozwinięcia chmur punktów obiektów symetrycznych. Przedstawienie geometrii obiektów w postaci chmur punktów następuje w wyniku przeprowadzenia pomiaru w technologii skaningu laserowego oraz odpowiedniego przetworzenia zapisanych obserwacji. Powstały zbiór danych przestrzennych stanowi szczegółową i dokładną numeryczną reprezentację pomierzonych powierzchni obiektu. W skład chmur wchodzą często miliony punktów, co powoduje występowanie trudności interpretacyjnych podczas ich wizualizacji. W szczególny sposób dotyczy to cechujących się regularnością kształtu obiektów symetrycznych. W trójwymiarowej przestrzeni pomierzone punkty przedstawiają odrębne części obiektu i występują wtedy na jednym kierunku. Celem pracy było stworzenie alternatywnej postaci chmury punktów, która zachowuje dotychczasową szczegółowość, pozwala na czytelniejszą jej prezentację i ułatwia wnioskowanie odnośnie geometrii obiektu symetrycznego. Przeprowadzenie przestrzennego rozwinięcia chmury punktów wymaga określenia regularnej matematycznej powierzchni podstawowej, aproksymującej kształt obiektu symetrycznego. Powierzchnią tą może być np. walec, sfera, elipsoida obrotowa lub hiperboloida. Stanowi ona powierzchnię odniesienia dla pomierzonych punktów w chmurze. Drugim niezbędnym elementem koniecznym do przeprowadzenia rozwinięcia jest zdefiniowanie elementu symetrii powierzchni podstawowej (punktu lub linii). Do wyznaczenia wartości parametrów geometrycznych określających zarówno powierzchnie, jak i elementy symetrii wykorzystano m.in. nieodporne i odporne metody estymacji. W oparciu o uzyskane parametry przeprowadzana jest parametryzacja wszystkich punktów z chmury, polegająca na przypisaniu im odpowiednich współrzędnych krzywoliniowych związanych z powierzchnią podstawową. Dodatkowo, wyznaczane są liniowe wartości separacji punktów od powierzchni pierwotnej (tzw. parametr głębokości przestrzennego rozwinięcia). W efekcie uzyskiwany jest nowy sposób prezentacji chmury punktów obiektu symetrycznego, opierający się na współrzędnych krzywoliniowych oraz parametrze głębokości.

  • Psychophysiological strategies for enhancing performance through imagery – skin conductance level analysis in guided vs. self-produced imagery
    • Dagmara Budnik-Przybylska
    • Paweł Syty
    • Maria Kaźmierczak
    • Jacek Przybylski
    • Łukasz Doliński
    • Marta Łabuda
    • Patryk Jasik
    • Adrian Kastrau
    • Selenia di Fronso
    • Maurizio Bertollo
    2024 Full text Scientific Reports

    Athletes need to achieve their optimal level of arousal for peak performance. Visualization or mental rehearsal (i.e., Imagery) often helps to obtain an appropriate level of activation, which can be detected by monitoring Skin Conductance Level (SCL). However, different types of imagery could elicit different amount of physiological arousal. Therefore, this study aims: (1) to investigate differences in SCL associated with two instructional modalities of imagery (guided vs. self-produced) and six different scripts; (2) to check if SCL could differentiate respondents according to their sport expertise. Thirty participants, aged between 14 and 42 years (M = 22.93; SD = 5.24), with different sport levels took part in the study. Participants listened to each previously recorded script and then were asked to imagine the scene for a minute. During the task, SCL was monitored. We analysed the mean value, variance, slope and number of fluctuations per minute of the electrodermal signal. Unsupervised machine learning models were used for measuring the resemblance of the signal. The Wilcoxon signed-rank test was used for distinguishing guided and self-produced imagery, and The Mann–Whitney U test was used for distinguishing results of different level athletes. We discovered that among others, self-produced imagery generates lower SCL, higher variance, and a higher number of fluctuations compared to guided imagery. Moreover, we found similarities of the SCL signal among the groups of athletes (i.e. expertise level). From a practical point of view, our findings suggest that different imagery instructional modalities can be implemented for specific purposes of mental preparation.

  • Public space as a place of rehabilitation for the elderly – a systematic literature review
    • Agnieszka Gębczyńska-Janowicz
    • Rafał Janowicz
    2024 Full text MEDYCYNA PRACY

    The phenomenon of the population’s gradual global ageing means that an increasing proportion of research is concerned with the space in which seniors function on a daily basis. They are primarily aimed at identifying elements of the built environment that need updating in the new social context. The purpose of the analyses presented in this article is to review the current scientific literature on various aspects of physical activity of people outdoors in an urbanized environment. The scope review was based on the resources of 3 scientific databases (Web of Science, Scopus and PubMed). The analyses concerned articles published in the last decade (2013–2023). The collected material was subjected to the PRISMA procedure (Preferred Reporting Items for Systematic Reviews and Meta-Analytics), and 29 articles were extracted for analysis. The conducted research indicated thematic scopes that are undertaken in contemporary research on physical activities of a rehabilitation nature undertaken in public space by older people (>65 years of age). The research topics described in the articles analysed dealt with elements defining the characteristics of public space that mobilise older people to be active, identified barriers preventing its use and factors popularising it. The studies analysed also identified the characteristics of public spaces according to the type of activity used by seniors for rehabilitation. The result of the review is the separation of the thematic scope of research on the activation of the elderly in the open air towards rehabilitation. The information provided may be useful for architects, urban planners and people managing urban spaces to determine design solutions that meet the needs of older people.

  • Public valuation of social impacts. The comparison between mega and non-mega sporting events
    • Krystian Zawadzki
    2024 Full text Journal of Policy Research in Tourism Leisure and Events

    The main aim of this study is to assign value to intangible effects,including social impacts, which appear when organising sportingevents of various scales in the city of Gdansk located in northernPoland. A survey was conducted to determine the city residents’willingness-to-pay (WTP) using the contingent valuation method(CVM). The average WTP values, which ranged between PLN 6.04and PLN 46.34, show that the scale of the sporting event may beimportant for the local community’s perception of such socialimpacts as well-being and urban regeneration. However,considering the costs of organising sporting events–includingthe preparation of sporting facilities–it turns out that it is easierto justify spending public funds for holding smaller events,among others, due to the possibility of organising such events inthe same place more frequently.

  • Pulse Transit Time - Fiducial Points Accuracy Determination as Examined by Means of Synthetic Signals
    • Artur Poliński
    • Adam Bujnowski
    • Tomasz Kocejko
    • Jerzy Wtorek
    2024

    There are many approaches to non-invasively deter-mine blood pressure. Among them there are methods based on utilizing pulse transit time measured by means of photoplethys-mography. The variability of the blood pressure drop between two measurement sensors placed along the artery and its dependence on the selected parameters describing the cardiovascular system is presented in the paper. This pressure drop modifies the pressure pulse propagation velocity, thus also value of PTT. The properties of four fiducial points on the radial and brachial arteries were analyzed. Publicly available simulation data were used for the analyses. The best results were achieved for the point defined by the maximum of the first derivative of the signal.

  • PVA-Based Films with Strontium Titanate Nanoparticles Dedicated to Wound Dressing Application
    • Beata Kaczmarek-Szczepańska
    • Lidia Zasada
    • Marcin Wekwejt
    • Maria Swiontek Brzezinska
    • Anna Michno
    • Anna Ronowska
    • Magdalena Ciesielska
    • Ganna Kovtun
    • M. Teresa Cuberes
    2024 Full text Polymers

    Bioactive materials may be applied in tissue regeneration, and an example of such materials are wound dressings, which are used to accelerate skin healing, especially after trauma. Here, we proposed a novel dressing enriched by a bioactive component. The aim of our study was to prepare and characterize poly(vinyl alcohol) films modified with strontium titanate nanoparticles. The physicochemical properties of films were studied, such as surface free energy and surface roughness, as well as the mechanical properties of materials. Moreover, different biological studies were carried out, like in vitro hemo- and cyto-compatibility, biocidal activity, and anti-biofilm formation. Also, the degradation of the materials’ utilization possibilities and enzymatic activity in compost were checked. The decrease of surface free energy, increase of roughness, and improvement of mechanical strength were found after the addition of nanoparticles. All developed films were cyto-compatible, and did not induce a hemolytic effect on the human erythrocytes. The PVA films containing the highest concentration of STO (20%) reduced the proliferation of Eschericha coli, Pseudomonas aeruginosa, and Staphylococcus aureus significantly. Also, all films were characterized by surface anti-biofilm activity, as they significantly lowered the bacterial biofilm abundance and its dehydrogenase activity. The films were degraded by the compost microorganism. However, PVA with the addition of 20%STO was more difficult to degrade. Based on our results, for wound dressing application, we suggest using bioactive films based on PVA + 20%STO, as they were characterized by high antibacterial properties, favorable physicochemical characteristics, and good biocompatibility with human cells.

  • Quality control of cheese samples for the presence of natamycin preservative – A natural deep eutectic solvent (NADES) based extraction coupled with HPLC
    • Hameed Haq
    • Nail Altunay
    • Mustafa Tuzen
    • Grzegorz Boczkaj
    2024 JOURNAL OF FOOD COMPOSITION AND ANALYSIS

    A new protocol for the determination of natamycin – an antifungal agent used as a food preservative - in cheese samples – is described. This new method is based on a natural deep eutectic solvent (NADES) green extraction procedure. High-performance liquid chromatography (HPLC) was used for detection and quantification. NADESs with different molar ratios were evaluated for efficient and selective extraction. NADES made of thymol and nonanoic acid (1:1) revealed to be the best extracting solvent. All significant analytical parameters - pH, temperature, NADES volume, time for sonication were optimized using Plackett-Burman (PB) and central composite design (CCD) - response surface methodology (RSM). Optimum conditions for extraction were pH 7, temperature 25°C, NADES volume 4.5 mL for 20 mL sample, and sonication time 10 mins. The developed method has a satisfactory linearity of 2–80.4 mg/kg, limits of detections (LOD), and limit of quantification (LOQ) of 0.45 and 1.45 mg/kg respectively. Under optimized conditions, the sample preparation procedure takes 12 mins. The method was found selective due to the unique and representative features of DESs. Furthermore, the extracts are analyzed by HPLC which provides a second very effective separation step, assuring the selectivity of the method. Validation of the method confirms the robustness and reproducibility of the NADES-based extraction coupled with the HPLC method demonstrating the effectiveness of NADES. The findings of this work contribute to the field of food safety and quality control, offering a novel and efficient approach to the detection of natamycin in cheese samples.