title: Antioxidant activity and phenolic content of Oregon caneberries.
abstract: Five types of caneberries [evergreen blackberries (Rubus laciniatus), marionberries (Rubus ursinus), boysenberries (Rubus ursinus x idaeus), red raspberries (Rubus idaeus), and black raspberries (Rubus occidentalis)] were analyzed for antioxidant activity by measuring their oxygen radical absorbance capacity (ORAC). In addition, the berries were analyzed for total phenolics, anthocyanins, procyanidins, and ellagic acid content. All of the berries had high ORAC activity ranging from 24 to 77.2 micromol of Trolox equiv/g of fresh berries. Anthocyanin content ranged from 0.65 to 5.89 mg/g, and phenolics ranged from 4.95 to 9.8 mg/g. Black raspberries had the highest ORAC and anthocyanin and phenolic contents. Only red raspberries had detectable amounts of procyanidin oligomers (monomer, dimers, and trimers). All berries had high levels of ellagic acid (47-90 mg/g), but boysenberries had the highest level prior to hydrolysis. The results from this study indicate that these caneberries were high in antioxidant activity and were rich sources of anthocyanins and phenolics.
authors.affiliation: LW Consulting, Suite 238, 1499 Bayshore Highway, Burlingame, California 94010, USA. lwada@pacbell.net
authors.forename: Leslie
authors.initials: L
authors.lastname: Wada
authors.forename: Boxin
authors.initials: B
authors.lastname: Ou
mesh_terms: D000872:Anthocyanins / Q000032:analysis; D000975:Antioxidants / Q000032:analysis* / Q000494:pharmacology; D044946:Biflavonoids; D002392:Catechin / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D004610:Ellagic Acid / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D009922:Oregon; D010636:Phenols / Q000032:analysis*; D044945:Proanthocyanidins; D017382:Reactive Oxygen Species / Q000032:analysis; D027824:Rosaceae / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D044946:Biflavonoids; D010636:Phenols; D044945:Proanthocyanidins; D017382:Reactive Oxygen Species; D004610:Ellagic Acid; C017674:procyanidin; D002392:Catechin