Abstract
Nowadays, a search for sources of the most biologically active antioxidant compounds among various herbs is an urgent problem. In this connection, several succulent plants from the Aloe genus are of special interest, because their preparations are widely used in domestic medicine. In this study, we measured the antioxidant activity (AOA) of an alcoholic extract of leaves of 15 Aloe species by amperometric and chemiluminescent methods and performed a comparative analysis of the results. We observed a considerable difference between the AOA values for the several Aloe species and explained this fact. The most active antioxidant among the samples proved to be the A. pillansii representative of the Aloe genus. Both methods demonstrated that the extracts from leaves of this Aloe species exhibited the high AOA. The A. broomii and A. spinosissima also had rather high AOA along with the A. pillansii and A. arborescens. The newly discovered Aloe species could be as promising a source of biologically active compounds as the traditionally used A. arborescens and A. vera.
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