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master's thesis
Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala
2024. urn:nbn:hr:109:474522
Balaž, Lea
Josip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
Department of Applied Chemistry and Ecology

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Balaž, L. (2024). Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY. Retrieved from https://urn.nsk.hr/urn:nbn:hr:109:474522

Balaž, Lea. "Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala." Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2024. https://urn.nsk.hr/urn:nbn:hr:109:474522

Balaž, Lea. "Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala." Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2024. https://urn.nsk.hr/urn:nbn:hr:109:474522

Balaž, L. (2024). 'Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala', Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, accessed 30 January 2025, https://urn.nsk.hr/urn:nbn:hr:109:474522

Balaž L. Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY; 2024 [cited 2025 January 30] Available at: https://urn.nsk.hr/urn:nbn:hr:109:474522

L. Balaž, "Valorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala", Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, Osijek, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:109:474522

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Metadata
TitleValorizacija otpadne kore dunje primjenom prirodnih eutektičkih otapala
Title (english)Valorization of Waste Quince Peel Using Natural Eutectic Solvents
AuthorLea Balaž
MentorIvana Tomac (mentor)
MentorValentina Bušić (komentor)
Committee memberDajana Gašo-Sokač (predsjednik povjerenstva)
Committee memberIvana Tomac (član povjerenstva)
Committee memberValentina Bušić (član povjerenstva)
Committee memberLidija Jakobek Barron (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
(Department of Applied Chemistry and Ecology)
Osijek
Defense date and country2024-11-27, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Food Technology
Engineering
Abstract
Valorizacija otpada nastalog preradom voća i povrća predstavlja održiv način dobivanja proizvoda dodane vrijednosti. Ovaj rad uključuje valorizaciju otpadne kore dunje (Cydonia oblonga). Kako bi ekstrakcija bioaktivnih spojeva bila ekološki prihvatljiva, uporabljena su zelena otapala poput prirodnih eutektičkih otapala. U ovom je radu ispitana mogućnost primjene pet prirodnih eutektičkih otapala s udjelima vode od 40 % i 80 % (v/v) u ekstrakciji otpadne kore dunje. Rezultati su uspoređeni s konvencionalnim načinom ekstrakcije u zakiseljenom etanolu. Kako je literaturno dokazano da je kora dunje bogata enzimom acetilesteraza, koji posjeduje hidrolitičku aktivnost, ispitana je mogućnost hidrolize acetilsalicilne kiseline u prisutnosti kore dunje u vodi kao zelenom otapalu. Elektrokemijskom tehnikom diferencijalne pulsne voltametrije određen je ukupan sadržaj polifenola u ekstraktu dunje. Ekstrakt je obogaćen određenom koncentracijom jednih od najzastupljenijih polifenolnih spojeva u dunji u svrhu identifikacije i kvantifikacije polifenola u realnom uzorku. Korištena je ugljikova elektroda s nanosom ugljikovih nanočestica kao radna elektroda, ugljik kao pomoćna elektroda i srebro/srebro klorid kao referentna elektroda.
Abstract (english)
The valorization of waste generated from processing fruits and vegetables represents a sustainable approach to producing value-added products. This study focuses on valorizing quince (Cydonia oblonga) waste bark. To ensure environmentally friendly extraction of bioactive compounds, green solvents such as natural eutectic solvents were employed. Specifically, the study examined the use of five natural eutectic solvents with water contents of 40% and 80% (v/v) for extracting compounds from quince bark. The results were compared to those obtained using a conventional extraction method involving acidified ethanol. Given that literature indicates quince bark is rich in the enzyme acetylesterase, known for its hydrolytic activity, this study also explored the hydrolysis of acetylsalicylic acid in the presence of quince bark using water as a green solvent. The total polyphenol content in the quince extract was measured using differential pulse voltammetry, an electrochemical technique. This extract was analyzed to identify and quantify one of the most abundant polyphenolic compounds in quince. For the electrochemical measurements, a carbon electrode coated with carbon nanoparticles served as the working electrode, with carbon as the auxiliary electrode and silver/silver chloride as the reference electrode.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:109:474522
Study programmeTitle: Process Engineering
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka procesnog inženjerstva (sveučilišni/a magistar/magistra inženjer/inženjerka procesnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) icon
Created on2024-12-09 07:54:10