Antioxidant activity and dosage of phenolics of Euterpe oleracea Mart extract. (açaí)
DOI:
https://doi.org/10.70151/ynqegc18Keywords:
Euterpe oleracea, Antioxidants, Dosage of Phenolics, plants medicinalsAbstract
Euterpe oleracea belongs to the family Palmae, important by the economic point of view. The chemical study with this specie showed a great diversification of chemical constituents encompassing since fatty acids to phenolic compounds. Several studies have been demonstrated that plants are an important source of compounds with antioxidant activities (AA). The aim of this study was to investigate the AA of different extracts of Euterpe palm in different concentrations (0,1; 1, 10 and 100 μg/mL) by deoxyribose degradation assay, nitro blue tetrazolium (NBT) reduction test and inhibition of peroxidation. All hydrofilic extracts tested showed inhibition of deoxyribose degradation up to 10 μg/mL. Butanolic extract from fruits, ethyl acetate extract from leaves and spikes and ethanolic extract from flowers and leaves as well as butanolic extracts from leaves and spikes were able to inhibit from 100 to 75% of deoxyribose degradation The lipofilic extrats were able to inhibit deoxyribose degradation only at higher concentration. However, in the NBT reduction test the dichloromethane extract from fruits was the most effective, showing 71% of O₂ scavenger capacity. The other exracts tested showed around 20% O₂ scavenger capacity in the higher concentration. As observed to NBT reduction test in the lipoperoxidation test the more effective extracts were the lipofilic ones, hexane extract from leaves showed 46% of peroxidation inhibition at 100 μg/mL.
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