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- W4231242040 abstract "In view of the pharmacological interest in flavonoids, the superoxide radical scavenging capacity of pet-ether, chloroform, and methanol extracts and flavonoids of Blumea balsamifera DC leaves on nonenzymatically (phenazine methosulfate/NADH) generated superoxide radicals were evaluated. The methanol extract (93.91 ± 1.37%) exhibited higher radical scavenging activity than the chloroform extract (84.58 ± 1.51%). The pet-ether extract was inactive toward nonenzymatically generated superoxide radicals. The superoxide radical scavenging capacity of flavonoids (100 µM) as determined was decreased in the order quercetin > luteolin > 5,7,3′,5′-tetrahydroxyflavanone > blumeatin > rhamnetin > tamarixetin > luteolin-7-methyl ether > dihydroquercetin-4′-methyl ether > dihydroquercetin-4′,7-dimethyl ether. It was concluded that flavonoids with a free hydroxyl group were more active than methylated compounds, and the flavonoid content of extracts contributed to their superoxide radical scavenging activity." @default.
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- W4231242040 date "2004-01-01" @default.
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- W4231242040 title "Superoxide Radical Scavenging Properties of Extracts and Flavonoids Isolated from the Leaves of<i>Blumea balsamifera</i>" @default.
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- W4231242040 doi "https://doi.org/10.1080/13880200490885969" @default.
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