In the present study the total phenols, flavonoids, carotenoids and capsaicinoids content, the in vitro antioxidantand hypoglycemic activities of extracts of air-dried fruits fromtwo Capsicumannuum cultivarswere investigated.A different composition between the two cultivars was evidenced. C. annuum var. acuminatum medium extractpresented 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 with68.0, 87.6 and 29.7 μg/g dried weight, respectively, analyzed by HPLC. Medium pepper showed the highestradical scavenging activity in DPPH assay (IC50 of 85.3 μg/ml) while big pepper have an interesting activityin ABTS assay (IC50 of 16.4 μg/ml) and the highest inhibition of linoleic acid oxidation with an IC50 value of1.2 μg/ml after 30 min of incubation. A selective inhibitory activity against α-amylase was demonstrated forC. annuum var. acuminatum big lipophilic fraction (IC50 values of 8.7 μg/ml). The obtained results suggestthat C. annuum cultivars could be used as valuable flavor with functional properties for foods.
Air-dried Capsicum annuum var. acuminatum medium and big: determination of bioactive constituents, antioxidant activity and carbohydrate-hydrolyzing enzymes inhibition
TUNDIS, ROSA;LOIZZO, Monica Rosa;Bonesi M;CONFORTI, FILOMENA;
2012-01-01
Abstract
In the present study the total phenols, flavonoids, carotenoids and capsaicinoids content, the in vitro antioxidantand hypoglycemic activities of extracts of air-dried fruits fromtwo Capsicumannuum cultivarswere investigated.A different composition between the two cultivars was evidenced. C. annuum var. acuminatum medium extractpresented 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 with68.0, 87.6 and 29.7 μg/g dried weight, respectively, analyzed by HPLC. Medium pepper showed the highestradical scavenging activity in DPPH assay (IC50 of 85.3 μg/ml) while big pepper have an interesting activityin ABTS assay (IC50 of 16.4 μg/ml) and the highest inhibition of linoleic acid oxidation with an IC50 value of1.2 μg/ml after 30 min of incubation. A selective inhibitory activity against α-amylase was demonstrated forC. annuum var. acuminatum big lipophilic fraction (IC50 values of 8.7 μg/ml). The obtained results suggestthat C. annuum cultivars could be used as valuable flavor with functional properties for foods.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
