Research Article
Effect of Extraction Conditions on the Antioxidant Activity of Olive Wood Extracts
Table 4
Extraction yields and radical scavenging percentages of several extracts prepared by the extraction procedures E3 and E4 from olive wood samples A, B, C, and D.
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Extracts were prepared from (a) the olive wood sample A, collected in April, 2003 (during the pruning period) at the village of Fuensanta, Jaén province, Spain; (b) the olive wood sample B, collected in March, 2005 (during the pruning period) at the same location of sample A; (c) the olive wood sample C, collected in March, 2005 (during the pruning period) at the village of Mogón, Jaén province, Spain; (d) the olive wood sample D, collected in November, 2006 (during the harvesting season) at the same location of sample A. Procedures E3 and E4 are detailed in Figures 3 and 4. Yield is expressed as grams of extract per kilogram of olive wood sample. Radical scavenging percentage (RSP) is expressed as DPPH• scavenging (%). Values are means of three replicates ± SD (standard deviation). eCommercially available rosemary extract was used as reference, at the same concentration (50 g mL−1). |