Antioxidant activity of crude phenolic extracts from wild blueberry leaves.
Year: 2003
Type: article
Abstract: Blueberry leaves were extracted with ethanol (95%, v/v) or aqueous acetone (70%, v/v). The crude extracts so obtained were evaporated to near dryness and then lyophilized. The antioxidant activity of these phenolic extracts was evaluated using the β-carotene-linoleate, 2,2-diphenyl-1-picrylhydrazyl radical (DPPH○) and 2-thiobarbituric acid reactive substances (TBARS) assays. The content of crude tannins in ethanol and acetone extracts of blueberry leaves was 181 and 213 mg catechin equivalents/g extract, respectively. The antioxidant activity of phenolic extracts using the β-carotene-linoleate model system was comparable to that exhibited by the synthetic antioxidant butylated hydroxyanisole (BHA). The DPPH○ scavenging effect of crude phenolic extracts, at 100 μg/assay, was over 90%. Inhibition of meat lipid oxidation ranged from 36.6 to 100% for crude phenolics of the ethanol extract at 200- and 1 000-ppm addition levels, respectively. Similar inhibitory effects were observed for crude extracts of blueberry leaves phenolics from the aqueous acetone preparation.
Language: English
Subfield: Biochemistry (medical)
Field: Medicine
Domain: Health Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $485
OpenAlex ID: W2187608875