In summary, antioxidative phenolic compounds from XiLan
olive dregs were successfully extracted using SCW. Under
appropriate extraction conditions, the effect of SCW extraction
(37.52±0.87 mg/g) was evidently superior to solvent
extraction. The results of RP assay, DPPH radical scavenging
assay, and ABTS radical scavenging assay further showed that
the antioxidant activities of SCWand methanol extracts were
strongly and positively correlated with the amounts of phenolic
compounds. At the same phenolic content, the antioxidant
activities of SCWextracts were stronger than those of methanol
extracts. SCW at 160 °C, solid-to-liquid of 1:50 and
30 min might be a good substitute to organic such as methanol
to obtain phenolic compounds from OFD.
In summary, antioxidative phenolic compounds from XiLanolive dregs were successfully extracted using SCW. Underappropriate extraction conditions, the effect of SCW extraction(37.52±0.87 mg/g) was evidently superior to solventextraction. The results of RP assay, DPPH radical scavengingassay, and ABTS radical scavenging assay further showed thatthe antioxidant activities of SCWand methanol extracts werestrongly and positively correlated with the amounts of phenoliccompounds. At the same phenolic content, the antioxidantactivities of SCWextracts were stronger than those of methanolextracts. SCW at 160 °C, solid-to-liquid of 1:50 and30 min might be a good substitute to organic such as methanolto obtain phenolic compounds from OFD.
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