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undergraduate thesis
ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA
2018. urn:nbn:hr:184:539432
Tijan, Paola
University of Rijeka
Faculty of Medicine
Department of Chemistry and Biochemistry

Cite this document

Tijan, P. (2018). ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA (Undergraduate thesis). Rijeka: University of Rijeka, Faculty of Medicine. Retrieved from https://urn.nsk.hr/urn:nbn:hr:184:539432

Tijan, Paola. "ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA." Undergraduate thesis, University of Rijeka, Faculty of Medicine, 2018. https://urn.nsk.hr/urn:nbn:hr:184:539432

Tijan, Paola. "ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA." Undergraduate thesis, University of Rijeka, Faculty of Medicine, 2018. https://urn.nsk.hr/urn:nbn:hr:184:539432

Tijan, P. (2018). 'ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA', Undergraduate thesis, University of Rijeka, Faculty of Medicine, accessed 19 November 2024, https://urn.nsk.hr/urn:nbn:hr:184:539432

Tijan P. ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA [Undergraduate thesis]. Rijeka: University of Rijeka, Faculty of Medicine; 2018 [cited 2024 November 19] Available at: https://urn.nsk.hr/urn:nbn:hr:184:539432

P. Tijan, "ANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA", Undergraduate thesis, University of Rijeka, Faculty of Medicine, Rijeka, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:184:539432

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Metadata
TitleANTIOKSIDATIVNA AKTIVNOST TOKOFEROLNOG EKSTRAKTA DOBIVENOG IZ RAZLIČITIH VRSTA ULJA
Title (english)ANTIOXIDANT ACTIVITY OF TOCOPHEROL EXTRACT OBTAINED FROM DIFFERENT TYPES OF OIL
AuthorPaola Tijan
MentorDalibor Broznić (mentor)
Committee memberMarin Tota (predsjednik povjerenstva)
Committee memberIvana Gobin (član povjerenstva)
Committee memberDalibor Broznić (član povjerenstva)
GranterUniversity of Rijeka
Faculty of Medicine
(Department of Chemistry and Biochemistry)
Rijeka
Defense date and country2018-09-21, Croatia
Scientific / art field,
discipline and subdiscipline		BIOMEDICINE AND HEALTHCARE
Basic Medical Sciences
Medical Biochemistry
Abstract
Ulja su važan dio prehrane čovjeka. U ovom istraživanju ispitivala se antioksidativna aktivnost maslinovog, suncokretovog, crnog i bučinog ulja te antioksidativna aktivnost ekstrakta vitamina E dobivenog iz prethodno navedenih vrsta ulja. Pomoću DPPH metode prikazana je antioksidativna aktivnost ulja i ekstrakta vitamina E. Pomoću spektrofotometra mjerena je promjena boje uzorka pri 515 nm. Gubitak signala DPPH radikala prikazuje antioksidativnu aktivnost određenog uzorka. TEAC metodom izražen je antioksidativni kapacitet. U metodi se koristi Trolox ekvivalent koji je analog vitaminu E te služi kao referentni standard pomoću kojega su izraženi rezultati dobiveni DPPH radikal metodom. Maslinovo ulje je pokazalo najveću antioksidativnu aktivnost tj gubitak signala DPPH radikala iznosio je 71%, iza njega slijedilo je suncokretovo ulje (69%), zatim crno (59%) i bučino(53%). Kod ekstrakata vitamina E najveći gubitak signala imao je ekstrakt vitamina E iz suncokretovog ulja (28%), pa iz crnog (20%), zatim iz maslinovog ulja (18%), ta najmanju antioksidativnu aktivnost pokazao je ekstrakt vitamina E iz bučinog ulja (10%).
Abstract (english)
Oils are an important part of the human diet. In this study I was testing the antioxidant activity of olive oil, sunflower oil, black oil and pumpkin seed oil as well as the antioxidant activity of vitamin E extract derived from the before mentioned oils. The DPPH method depicts the antioxidant activity of the oils and the extract of vitamin E. Using a spectrophotometer, the sample color change was measured at 515 nm. The loss of the DPPH radical signal shows antioxidant activity of a particular sample. The TEAC method was used to express the antioxidant capacity. The method uses a Trolox equivalent that is analogue to vitamin E and serves as a reference standard to express the results obtained by the DPPH radical method. Olive oil showed the highest antioxidant activity of the DPPH radical signal loss at 71%, followed by sunflower oil (69%), then black oil (59%) and lastly pumpkin seed oil (53%). Concerning vitamin E extracts, the sunflower oil (28%) had the highest signal loss, followed by the black oil (20%), then olive oil (18%), and lastly the pumpkin seed oil (10%) which showed the least antioxidant activity.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:184:539432
Study programmeTitle: Study of Sanitary Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) sanitarnog inženjerstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) sanitarnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2018-12-07 09:08:55