Physicochemical Characteristics and Antioxidant Activity of Bracken (Pteridium aquilinum Kuhn) in Namhae

Abstract

In this study, we investigate the physicochemical characteristics of dried bracken (Pteridium aquilinum Kuhn) harvested in Namhae. The moisture, ash, crude protein and crude lipid content was 10.79±0.31%, 6.16±0.04%, 33.20±0.40% and 2.45±0.27%, respectively. The total mineral (Ca, Fe, K, Mg, Na, Mn) content was 36720.1±495.7 mg/kg, with K being the highest at 31890.0±503.8 mg/kg. The total free amino acid content was 704.41 mg/100 g, the amount of methionine, citrulline and sarcosine being higher than the others. The water and 50% ethanol extracts from the dried bracken were evaluated for the total poly phenolic compound content, antioxidant activity and xanthine oxidase and α-glucosidase inhibitory activity. The total polyphenol content in the 50% ethanol extract (1574.86±18.31 mg/100 g) was higher than in the water extract (1240.24±16.32 mg/100 g). The DPPH and ABT radical scavenging activity was increased according to the concentration of bracken extract, and the activity in the 50% ethanol extract was higher than in the water extract. In addition, the xanthine oxidase and α-glucosidase inhibitory activity was also higher in the 50% ethanol extract than in the water extract. In conclusion, bracken has great antioxidative and antidiabetic effects and can be used as a preventive agent for oxidation and diabetes.

Antioxidant, anti-photoaging, anti-inflammatory, and skin-barrier-protective effects of Gleichenia japonica extract

“…Various studies have been conducted to develop safe natural antioxidants, confirm the physiological activities of natural plants, and identify functional materials (Kim et al 2012;Choi et al 2010). In addition, because the use of natural raw materials increases the suppression of oxidative stress caused by active oxygen, studies have investigated safe and effective natural raw materials that can help with skin aging (Sim et al 2015). Ferns have been widely used in traditional medicine because they are generally effective against skin wounds, fever, and cough and have antibacterial, antiviral, and anticancer properties (Kwon et al 2009;Oh et al 2020).…”