Naslov
Polyphenol content and antioxidant activity of commercial blackberry wines from Croatia : The application of multivariate analysis for the geographical origin differentiation

Autori
Amidžić Klarić, Daniela ; Klarić, Ilija ; Mornar, Ana

Izvornik
Journal of food and nutrition research (1336-8672) 50 (2011), 4; 199-209

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
blackberry wine ; Rubus fruticosus ; polyphenols ; antioxidant activity ; HPLC ; multivariate analysis

Sažetak
Since polyphenolic compounds have been proposed to have beneficial effects on human health as antioxidants, the objectives of this study were to evaluate the polyphenol content and antioxidant activity in 17 commercial blackberry wine (BW) from three different Croatian subregions and to investigate the relationship between these compounds and geographical origin of BW. The statistically significant difference was found between the concentration of monomeric anthocyanins present in the samples from three subregions. Furthermore, the concentrations obtained for gallic acid were significantly higher than for chlorogenic, caffeic and p-coumaric acid. The half-maximal inhibitory concentrations (IC50%) were sightly higher for ABTS (2, 2′-azino-bis- [3- ethylbenthiazoline-6-sulfonic acid]) test than for DPPH (2, 2-diphenyl-1-picrylhydrazyl) test. Based on the results obtained by multivariate data analysis (principal component analysis, PCA, and linear discriminant analysis, LDA) three models were created that gave a satisfactory grouping of the investigated BW based on their geographic origin. The best discriminating model showed not only extreme separation concerning subregions but also a very narrow area of dispersion of individual wine samples intraregionally.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA