Air-dried capsicum annuum var. acuminatum medium and big: Determination of bioactive constituents, antioxidant activity and carbohydrate-hydrolyzing enzymes inhibition
2012
Tundis, Rosa | Loizzo, Monica R. | Menichini, Federica | Bonesi, Marco | Conforti, Filomena | De Luca, Damiano | Menichini, Francesco
In the present study the total phenols, flavonoids, carotenoids and capsaicinoids content, the in vitro antioxidant and hypoglycemic activities of extracts of air-dried fruits from two Capsicum annuum cultivars were investigated. A different composition between the two cultivars was evidenced. C. annuum var. acuminatum medium extract presented a major content of phenols, carotenoids, capsaicin and dihydrocapsaicin while C. annuum var. acuminatum big extract is characterized by the highest quercetin, luteolin and kaempferol content with 68.0, 87.6 and 29.7μg/g dried weight, respectively, analyzed by HPLC. Medium pepper showed the highest radical scavenging activity in DPPH assay (ICâ â of 85.3μg/ml) while big pepper have an interesting activity in ABTS assay (ICâ â of 16.4μg/ml) and the highest inhibition of linoleic acid oxidation with an ICâ â value of 1.2μg/ml after 30min of incubation. A selective inhibitory activity against α-amylase was demonstrated for C. annuum var. acuminatum big lipophilic fraction (ICâ â values of 8.7μg/ml). The obtained results suggest that C. annuum cultivars could be used as valuable flavor with functional properties for foods.
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