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The effect of grape seed oil fortification with extracts of natural antioxidants

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dc.contributor.author DRAGANCEA, Veronica
dc.contributor.author GUREV, Angela
dc.contributor.author STURZA, Rodica
dc.contributor.author HARITONOV, Svetlana
dc.contributor.author NETREBA, Natalia
dc.contributor.author BOEȘTEAN, Olga
dc.date.accessioned 2023-08-04T06:33:07Z
dc.date.available 2023-08-04T06:33:07Z
dc.date.issued 2023
dc.identifier.citation DRAGANCEA, Veronica, GUREV, Angela, STURZA, Rodica et al. The effect of grape seed oil fortification with extracts of natural antioxidants. In: Journal of Engineering Science. 2022, Vol. 30, Nr. 2, pp. 173-184. ISSN 2587-3474, eISSN 2587-3482. en_US
dc.identifier.issn 2587-3474
dc.identifier.issn 2587-3482
dc.identifier.uri https://doi.org/10.52326/jes.utm.2023.30(2).15
dc.identifier.uri http://repository.utm.md/handle/5014/23609
dc.description.abstract Grape seed oil (GSO) consists mostly of triglycerides of polyunsaturated fatty acids, which are sensitive to oxidation and to the high temperatures. The aim of this research was to study the effect of GSO fortification with hydroalcoholic extracts of antioxidants from grape seeds, up to and after 12 months. It was established that the immediate effect of the oil fortification was the increase of the total polyphenol content (TPC) in the oil, by up to 141.34 mg GAE/kg of oil, and the increase of the DPPH• antioxidant activity by up to 0.580 mmol TE/kg (in the control sample, refined grape oil, these values were 1.57 mg GAE/kg and 0.003 mmol TE/kg, respectively). After 12 months, TPC and DPPH• antioxidant activity decreased nearly 10-fold in all of the fortified oil samples. The difference between the oxidative status of the oil was assessed (UV-Vis). In the case of the GSO sample, treated with n-octyl gallate, the absorbances remained unchanged after 12 months. When compared to the synthetic antioxidant n-octyl gallate, grape seed polyphenolic extracts were found to have a less protective effect on the oil during storage under environmental conditions. en_US
dc.description.abstract Uleiul din semințe de struguri conține în mare parte din trigliceride ale acizilor grași polinesaturați, sensibile la oxidare și la acțiunea temperaturilor înalte. Scopul cercetărilor a fost de studia efectul fortificării uleiului cu extracte hidroalcoolice de antioxidanți din semințe de struguri. Fortificarea uleiului are ca efect imediat creșterea conținutului total de polifenoli (TPC) cu până la 141.34 mg GAE/kg de ulei și a activității antioxidante DPPH• cu până la 0.580 mmol TE/kg (în proba martor, ulei de struguri rafinat, aceste valori erau de 1.57 mg GAE/kg și 0.003 mmol TE/kg, respectiv). După 12 luni, TPC și activitatea antioxidantă DPPH• au scăzut aproape de 10 ori în toate probele de ulei fortificate. A fost observată diferența dintre starea oxidativă a uleiului (UV-Vis): în cazul probei GSO tratată cu n-octil galat, absorbanțele au rămas neschimbate după 12 luni. Extractul de polifenoli din semințe de struguri are un efect protector mai redus asupra uleiului pe perioada depozitării, în condiții ambientale, comparativ cu antioxidantul sintetic n-octil galat. en_US
dc.language.iso en en_US
dc.publisher Technical University of Moldova en_US
dc.relation.ispartofseries Journal of Engineering Science;2023, Vol. 30, Nr. 2
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject antioxidant activity en_US
dc.subject extract of polyphenols en_US
dc.subject grape seeds en_US
dc.subject grape seed oil en_US
dc.subject octyl gallate en_US
dc.subject activitate antioxidantă en_US
dc.subject extract de polifenoli en_US
dc.subject octil galat en_US
dc.subject semințe de struguri en_US
dc.subject ulei de semințe de struguri en_US
dc.title The effect of grape seed oil fortification with extracts of natural antioxidants en_US
dc.title.alternative Efectul fortificării uleiului de semințe de struguri cu extracte de antioxidanți naturali en_US
dc.type Article en_US


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