| Antioxidant efficacy of defatted almond whole seed, brown skin and green shell cover were investigated using a cooked comminuted pork model system. The inhibition of 2-thiobarbituric acid reactive substances (TBARS), total volatiles and hexanal by defatted almond at 2% (w/w) during a 7-day storage period ranged from 8--88, 38--90 and 57--90%, respectively. Since defatted almond products exhibited antioxidant properties, their crude extracts in ethanol were prepared at 70°C for 30 min. The total phenolic contents of ethanolic extracts of brown skin and green shell extracts were 10- and 9-times higher than that of the whole seed. Antioxidant activities of whole seed extract (WSE), brown skin extract (BSE) and green shell extract (GSE) of almond were evaluated using Trolox equivalent antioxidant capacity (TEAC) assay, beta-carotene-linoleate model and bulk stripped corn oil systems. Furthermore, inhibition of DNA scission and human low-density lipoprotein (LDL) oxidation by WSE, BSE and GSE was monitored. (Abstract shortened by UMI.). |
