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Title:Globoko evtektična topila za učinkovito in trajnostno ekstrakcijo bioaktivnih učinkovin iz olupkov izbranih slovenskih sort jabolk : magistrsko delo
Authors:ID Murenc, Nika Marija (Author)
ID Islamčević Razboršek, Maša (Mentor) More about this mentor... New window
Files:.pdf MAG_Murenc_Nika_Marija_2025.pdf (4,24 MB)
MD5: 228387F753EFD8C41E6D63451AEFC391
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Bioaktivne učinkovine so sekundarni metaboliti, ki jih najdemo v različnih rastlinskih vrstah, tudi v sadju. Zaradi svojih bioloških lastnosti imajo lahko različne zdravilne učinke za človeka, zato se priporoča njihovo uživanje. Vir teh učinkovin niso le užitni deli sadja, temveč tudi stranski proizvodi, ki nastanejo kot zavržki pri njegovi predelavi. Med najbolj pogosto gojeno sadje na svetu spada jabolko, ki ima zaradi svoje predelave v različne izdelke tudi veliko različnih stranskih proizvodov oz. odpadkov. V magistrskem delu smo določali sestavo olupkov različnih slovenskih sort jabolk, pri čemer smo za ekstrakcijo bioaktivnih učinkovin iz njih, uporabili različna ekstrakcijska topila. V želji, da se najpogosteje uporabljena konvencionalna organska topila nadomesti z zelenimi alternativami, smo kot ekstrakcijska topila uporabili pet različnih globoko evtektičnih topil, njihove ekstrakte pa smo primerjali z ekstrakti, pridobljenimi s 56 % etanolom. V globoko evtektičnih topilih smo kot akceptorja vodikovih vezi uporabili holin klorid ali mentol, kot donorje vodikovih vezi pa 1,2-propandiol, ocetno kislino, mlečno kislino in levulinsko kislino. V posameznih ekstraktih smo kvantificirali izbrane spojine in določali uspešnost posameznih topil, poleg tega pa smo določali tudi antioksidativno učinkovitost posameznih ekstraktov jabolčnih olupkov z različnimi antioksidativnimi testi (ABTS, FRAP, DPPH, TPC). Rezultati magistrskega dela so pokazali, da so globoko evtektična topila učinkovita in okolju prijazna alternativa etanolu pri ekstrakciji fenolnih spojin iz jabolčnih olupkov. Antioksidativni testi so potrdili, da ekstrakti, pridobljeni s takimi topili, pogosto dosegajo enako ali boljšo aktivnost kot etanolni ekstrakti.
Keywords:globoko evtektično topilo, ekstrakcija, bioaktivne učinkovine, antioksidanti, jabolčni olupki
Publication status:Published
Publication version:Version of Record
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[N. M. Murenc]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (X, 74 str.))
PID:20.500.12556/DKUM-92438 New window
UDC:66.061.3:[631.576.4:634.11](043.2)
COBISS.SI-ID:239011587 New window
Publication date in DKUM:02.06.2025
Views:297
Downloads:55
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:08.04.2025

Secondary language

Language:English
Title:Deep eutectic solvents for efficient and sustainable extraction of bioactive compounds from the peels of selected slovenian apple varieties
Abstract:Bioactive compounds are secondary metabolites found in various plant species, including fruits. Due to their biological properties, they can have many health benefits for humans, which is why their consumption is recommended. However, their source is not only the consumed parts of the fruit, but also its by-products. The apple is one of the most widely cultivated fruits and its processing into different products generates a large number of by-products or waste. In our master's thesis, we investigated the properties of the peels of different Slovenian apple varieties and used different solvents for the extraction of bioactive compounds from the peels. With the aim of replacing conventional organic solvents with environmentally friendly (green) alternatives, five different deep eutectic solvents were used as extraction agents and their extracts were compared with those obtained with 56 % ethanol. In deep eutectic solvents, we used choline chloride or menthol as hydrogen bond acceptors, and 1,2-propanediol, acetic acid, lactic acid, and levulinic acid as hydrogen bond donors. We quantified selected compounds in the individual extracts and evaluated the efficiency of various solvents. In addition, we investigated the antioxidant activity of the apple peel extracts using various antioxidant assays (ABTS, FRAP, DPPH, TPC). The results of the master thesis showed that deep eutectic solvents are an effective and environmentally friendly alternative to ethanol for the extraction of phenolic compounds from apple peels. Antioxidation tests confirmed that the extracts obtained with these solvents often show equivalent or even higher activity compared to ethanol extracts.
Keywords:deep eutectic solvent, extraction, bioactive compounds, antioxidants, apple peels


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