Abstract

Pomegranate, tomato and grape seeds are quantitatively relevant agri-food by-products rich in molecules beneficialto human health. To valorize this resource, the composition and antioxidant activity of seeds and derivingsupercritical CO2 (SC-CO2) extracted oleoresins were evaluated. Grape seeds showed the highest content of totalphenolic compounds (33.9 mg GAE/g), flavonoids (15.6 mg CE/g) and condensed tannins (14.0 mg CE/g), whiletomato seeds presented the highest content of tocochromanols (159.6 ?g/g). Grape seeds showed the highesttotal antioxidant activity (178.2 ?mol TE/g), as evaluated by TEAC assay, followed by pomegranate (19.8 ?molTE/g) and tomato (9.8 ?mol TE/g). Oleoresin yields obtained by SC-CO2 extraction from the seeds ranged between3.1 (pomegranate) to 7.8 (tomato) g oleoresin/100 g. Total tocochromanols were abundant in pomegranate(2008 ?g/g) and tomato (1769 ?g/g) oleoresins; a relatively low amount was instead detected in theoleoresin extracted from grape seeds (636 ?g/g). Carotenoids were not detected in all oleoresins. Pomegranateoleoresin had a higher antioxidant activity than the others. Mono- and polyunsaturated fatty acids were moreabundant than saturated in all oleoresins, with the highest percentage of unsaturated fatty acids detected inpomegranate seed oleoresin (~90%), mainly due to punicic acid (~70%).

Autore Pugliese

• Mita Giovanni , Durante Miriana

Tutti gli autori

• M. Durante; A. Montefusco; P.P. Marrese; M. Soccio; D. Pastore;G. Piro; G. Mita; M.S. Lenucci

Titolo volume/Rivista

Journal of food composition and analysis

Anno di pubblicazione

2017

ISSN

0889-1575

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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