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Anthocyanins and phenolic compounds of Mahonia aquifolium berries and their contributions to antioxidant activity
Scopus
Toplam 114 atıf DOI
Antioxidant activities, total phenolic and total monomeric anthocyanin contents were determined in mahonia berry extracts in different solvents. The methanol:water extract was purified to obtain anthocyanin and non-anthocyanin phenolic fractions, one at a time, and antioxidant activities of these fractions were also analyzed. Total phenolic and monomeric anthocyanin contents in mahonia berries were ranged from 1.30 (chloroform extract) to 1049.40 (methanol extract) mg GAE/100 g FW, and 40.68 (water extract) to 380.99 (ethanol extract) mg/100 g FW, respectively. The main phenolic and anthocyanin in mahonia berries were chlorogenic acid (373.12 mg/100 g FW), and cyanidin-3-O-glucoside (253.40 mg/100 g FW), respectively. The antioxidant activity of the anthocyanin fraction of the berries was approximately twofold higher than that of the phenolic fraction. The contribution of phenolic and anthocyanin compounds to the antioxidant activity of mahonia berries was greater than 83%. Phenolic compounds, especially anthocyanins, are the major antioxidant compounds found in mahonia berries.
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Determination of Some Physical, Chemical and Nutritional Properties in the Peel and Flesh of Three Crab Apple Species at Five Edible Maturity Stages
Scopus
Havuzumuzda Open Access 3 atıf almış
The main aim of this study was to determine the changes in quality properties and bioactive compounds of 3 crab apple species (Malus evereste, Malus floribunda and Malus floribunda coccinella) harvested at 5 different edible maturity stages. Acidity, soluble solids, organic acid and sugar contents were determined in the whole apple. The fleshes and peels of the crab apples were analyzed for antioxidant activities, color, protein, total monomeric anthocyanin, and total phenolic contents. Maturity stage had no significant effect on size, pH, titratable acidity, and citric acid content of crab apples. Peels of all three species had higher total phenolic, monomeric anthocyanin, tannin, and protein concentrations than their fleshes. M. evereste was the richest source of total phenolic and tannin among the species and it exhibited the highest antioxidant activity. Unlike the total phenolic compounds, anthocyanin accumulation was the highest in the flesh of M. floribunda. Concentrations of sugars in all species increased throughout the maturity. While the highest levels of glucose and fructose determined in M. evereste at the last stage, sucrose concentration was higher in M. floribunda that those in other two species at all stages. The trend in malic acid accumulation showed differences between the species. As a result, it can be concluded that the fruits of all species can be harvested in the first two weeks of September.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey