Filip Dujmić (Author), Karin Kovačević Ganić (Author), Duška Čurić (Author), Sven Karlović (Author), Tomislav Bosiljkov (Author), Damir Ježek (Author), Mladen Brnčić (Author), Rajko Vidrih (Author), Janez Hribar (Author), Emil Zlatić (Author), Tihomir Prusina (Author), Sucheta Khubber (Author), Francisco J. Barba (Author)

Abstract

This study presents the results of conventional aqueous (CE) and non-conventional ultrasound-assisted (UAE) extractions of polyphenolic compounds from lees extracts of red wine varieties (Merlot and Vranac). The effect of ultrasound extraction time (t, s), and amplitude (A,%) from a 400 W ultrasound processor with different ultrasonic probes diameters (Ds, mm) on the amount and profile of polyphenolic compounds in the obtained extracts was investigated and compared to CE. The optimal conditions resulting in maximum extraction of phenolic compounds were: Probe diameter of 22 mm, amplitude 90% and extraction time for Vranac wine lees 1500 s and for Merlot wine lees extraction time of 1361 s. UAE proved to be significantly more effective in enhancing the extraction capacity of trans-resveratrol glucoside (30.57% to 300%), trans-resveratrol (36.36% to 45.75%), quercetin (39.94% to 43.83%), kaempferol (65.13% to 72.73%), petunidin-3-glucoside (41.53% to 64.95%), malvidin-3-glucoside (47.63% to 89.17%), malvidin-3-(6-O-acetyl) glucoside (23.84% to 49.74%), and malvidin-3-(6-O-p-coumaroyl) glucoside (26.77% to 34.93%) as compared to CE. Ultrasound reduced the extraction time (2.5-fold) and showed an increase of antioxidant potential by 76.39% (DPPH) and 125.83% (FRAP) compared to CE.

Keywords

rdeča vina;vinske droži;ekstrakcija;nekonvencionalna ultrazvočna ekstrakcija;fenolne spojine;polifenoli;bioaktivne spojine;antioksidanti;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 577.1:663.252:547.56
COBISS: 5182328 Link will open in a new window
ISSN: 2304-8158
Views: 154
Downloads: 58
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: rdeča vina;vinske droži;ekstrakcija;nekonvencionalna ultrazvočna ekstrakcija;fenolne spojine;polifenoli;bioaktivne spojine;antioksidanti;
Type (COBISS): Article
Pages: str. 1-21
Volume: ǂVol. ǂ9
Issue: ǂiss. ǂ4
Chronology: 2020
DOI: 10.3390/foods9040472
ID: 14010153
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