Journal
JOURNAL OF MEDICINAL FOOD
Volume 12, Issue 1, Pages 167-174Publisher
MARY ANN LIEBERT, INC
DOI: 10.1089/jmf.2007.0568
Keywords
1,1-diphenyl-2-picrylhydrazyl free radical scavenging activity; ferric reducing antioxidant power assay; processing; total phenolic content
Funding
- University of Malaya [F0221/2004B, P0134/2006A]
- MOSTI [01-02-1001]
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Auricularia auricula-judae is currently grown in Malaysia. In the present study, the methanolic extracts from fruit bodies (fresh, oven-dried, and freeze-dried) and mycelium of A. auricula-judae were evaluated for their antioxidant capacities based on 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity and ferric reducing antioxidant power (FRAP) assay. The total phenolic content in the extracts were also measured. The extract of freeze-dried fruit bodies of A. auricula-judae had potent DPPH free radical scavenging activity with a 50% effective concentration of 2.87 mg/mL, whereas the FRAP value of A. auricula-judae mycelium was 5.22 mu mol of FeSO4 center dot 7H(2)O equivalents/g of mycelium sample. Further, a positive correlation (R-2 = 0.7668) between FRAP level of A. auricula-judae extracts and the total phenolic contents was observed. Thus the method of processing of fresh fruit bodies had an effect on the antioxidant potential of A. auricula-judae.
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