https://repository.utm.md/handle/5014/8303 2026-11-01T18:15:27Z 2026-11-01T18:15:27Z COJOCARI, Daniela BĂLAN, Greta DIANU, Irina AVRĂMIA, Ionuț CHETRARIU, Ancuța DABIJA, Adriana MACARI, Artur https://repository.utm.md/handle/5014/37668 2026-10-29T08:32:49Z 2026-01-01T00:00:00Z

Potențialul antimicrobian al extractului și pulberii de cătină împotriva Listeria monocytogenes COJOCARI, Daniela; BĂLAN, Greta; DIANU, Irina; AVRĂMIA, Ionuț; CHETRARIU, Ancuța; DABIJA, Adriana; MACARI, Artur Listeria monocytogenes reprezintă unul dintre cei mai importanți agenți patogeni alimentari, fiind responsabilă de infecții severe asociate cu rate ridicate de spitalizare și mortalitate. În contextul interesului crescând pentru conservanții naturali, cătina este considerată o sursă valoroasă de compuși bioactivi cu potențial antimicrobian. Scopul studiului. Evaluarea in vitro a activității antimicrobiene a extractului și pulberii de cătină asupra tulpinii Listeria monocytogenes ATCC 13932.; Listeria monocytogenes is one of the most important foodborne pathogens, responsible for severe infections associated with high hospitalization and mortality rates. In the context of growing interest in natural preservatives, sea buckthorn (Hippophae rhamnoides L.) is considered a valuable source of bioactive compounds with antimicrobial potential. Aim of the study. To evaluate the in vitro antimicrobial activity of sea buckthorn extract and powder against Listeria monocytogenes ATCC 13932.

2026-01-01T00:00:00Z BARBAROȘ, Maria-Marcela https://repository.utm.md/handle/5014/37599 2026-10-26T10:53:11Z 2026-01-01T00:00:00Z

Modern technologies for the extraction and modification of dietary fibers from agro-food by-products BARBAROȘ, Maria-Marcela Dietary fibers are essential structural components of the plant cell wall, playing a major role from both nutritional and technological perspectives [3,4]. Classified into soluble and insoluble dietary fibers, they are associated with important physiological benefits and functional properties relevant to the food industry [4]. Agro-food by-products, particularly fruit and vegetable pomace, represent valuable yet underutilized sources of dietary fibers [1]. This article provides a critical overview of the main types of dietary fibers, their plant sources, and the conventional and emerging methods used for their extraction and modification. Conventional chemical and thermal extraction methods are widely used to obtain dietary fibers from agro-food by-products; however, they may lead to polysaccharide degradation and loss of functional properties. In this context, emerging non-enzymatic technologies, such as ultrasoundassisted extraction and microwave-assisted extraction, have attracted significant interest due to their higher efficiency and reduced environmental impact. The study evaluates the influence of three extraction methods-conventional extraction, ultrasound-assisted extraction, and microwaveassisted extraction-on the physicochemical characteristics of dietary fiber concentrates obtained from fruit pomace. The results provide a scientific basis for the sustainable valorization of fruit processing industry by-products as functional ingredients for food and nutraceutical applications. Chemical, enzymatic, and physical methods (ultrasound, microwaves, pulsed electric fields, supercritical fluids), as well as processing technologies such as extrusion and thermal treatments, are analyzed, highlighting their impact on yield, structure, and functionality of dietary fibers [1,2,5-7]. Within the context of the circular bioeconomy, the need to develop sustainable technologies that enable efficient valorization of food waste and the production of high value-added functional ingredients is emphasized [1,2].

2026-01-01T00:00:00Z POPOVICI, Violina COVALIOV, Eugenia CAPCANARI, Tatiana https://repository.utm.md/handle/5014/37598 2026-10-26T10:43:32Z 2026-01-01T00:00:00Z

Characterization and storage stability of liposomes as delivery systems for carotenoids POPOVICI, Violina; COVALIOV, Eugenia; CAPCANARI, Tatiana Carotenoids are valuable bioactive compounds with strong antioxidant properties; however, their application in food systems is limited by low stability and reduced bioavailability. Liposomal encapsulation represents an efficient strategy to protect carotenoids and improve their functional performance. In this study, carotenoid-loaded liposomes were characterized in terms of particle size, antioxidant activity during in vitro digestion, and storage stability. The obtained liposomes showed particle sizes ranging between 144.87±3.17 and 205.28±2.48 nm, confirming their nanoscale structure and suitability for food applications. In vitro digestion revealed a higher antioxidant activity for encapsulated carotenoids compared to the free extract during both gastric and intestinal phases, demonstrating the protective effect of the liposomal system and improved bioaccessibility. Storage stability assessment indicated a decrease in the content of encapsulated bioactive compounds after four weeks, from 80.16±0.87 µg/g to 61.48±1.12 µg/g, while maintaining significant antioxidant potential. The obtained results confirm that liposomes act as effective delivery systems for carotenoids, enhancing their stability, digestive behavior, and functional properties, and highlighting their potential application in the development of fortified and functional food products.

2026-01-01T00:00:00Z NOVAC, Gheorghe https://repository.utm.md/handle/5014/37582 2026-10-22T10:48:21Z 2025-01-01T00:00:00Z

The spread of koelreuteria paniculata laxm. Under ecological conditions in the Republic of Moldova NOVAC, Gheorghe Koelreuteria paniculata Laxm. is a woody plant native to China, Korea and Japan. Grows to 8-10 meters in height. It is used for landscaping purposes, and also has honeykeeping properties. It prefers warm, sunny, frost-free, fertile soils, but also tolerates compacted, dry soils and even poor soils. She has a light temperament. Being a rare species in Moldova, the ecological, economic and social benefits of K. paniculata are little known. The aim of the study is to analyse the natural framework in the Republic of Moldova where the species K. paniculata is widespread. The research material consisted in the analysis of parcel descriptions from the forestry offices Olanesti (Tighina Forest Enterprise) and Taraclia (Silva-Sud Cahul Forest Enterprise), where K. paniculata is included in the composition of stands. In order to achieve the aim, the method of bibliographical documentation, observation, analysis and synthesis was used. The studied territory falls zonally in the moderate-continental climate sector, which is characterized by mild and short winters with little snow and warm summers, long-lasting, with a low amount of precipitation.

2025-01-01T00:00:00Z