Antioxidant activity of Trachystemon orientalis (L.) G. Don (Borage) grown and eaten as food in Ordu, Turkey

Abstract

SummaryIntroductıon: Instead of synthetic antioxidants, using of natural products with antioxidant activity is demanded.Objectıve: The aim of this study is to evaluate the antioxidant activity and total phenolic and flavonoid contents of theTrachystemon orientalis(borage) obtained from Ordu.Methods: The water and ethanol extracts of the borage plant were investigated by using severalin vitroantioxidant activity tests such as total antioxidant capacity, O2•−,•OH, DPPH and ABTS radicals scavenging activities, hydrogen peroxide scavenging activity, FRAP, Fe2+chelating and reducing power assays in order to make effective comparisons.Results: Water extract of theT. orientalishad the more phenolic (90 mg GA/g extract) and flavonoid (56.88 mg CT/g extract) contents than ethanol extract. Furthermore, both of the extracts showed strong antioxidant and radical scavenging activities determined by differentin vitromodels. The highest total antioxidant capacity as ascorbic acid equivalents of 244.50 mg/g extract was also calculated for water extract. Generally, a relationship between total phenolic content and antioxidant activity was established. It is also an important finding for an edible food source that the phenolic and flavonoid content and antioxidative activities for water extract was higher than the ethanol extract.Conclusıon:T. orientaliscould be used as a food ingredient instead of synthetic antioxidants and all results will contribute to the recent increase in investigations on using natural products in many areas such as food, pharmacy, alternative medicine and natural therapy.

Total Antioxidant Potential, Total Phenolic Profile and Cytotoxic Activity Against Brain Cancer: Melocan and Galdirik

“…The difference is statistically insignificant (p=0.165). In previous studies on galdirik, the total phenolic content was 9000 mg/100 g in water extracts and 2120 mg/100 g in ethanol extracts ( 32 ). The values found in the present study are lower than those found in the literature.…”

“…As with melocan, the water extract of galdirik had a higher antioxidant activity than the 70 % ethanol extract (p=0.165). The antioxidant activity of the water and ethanol extracts of galdirik was measured in a previous study ( 32 ) using the ABTS free radical scavenging activity assay, and the results were 1725 and 240 mmol/kg, respectively. In that study, the antioxidant concentration of this plant was comparable to that of broccoli and asparagus extracts, which had a value of 26.2 mmol/kg.…”

Phenolic compounds profile, neuroprotective effect and antioxidant potential of a commercial Turkish coffee

“…It is estimated that extracts or compounds which prevent metal-induced free radical development by inhibiting the formation of complexes between ferrozine and iron can prevent lipid peroxidation. Due to their phenolic contents, they might have chelating activity and turn the transition metals stable [35]. From this point of view, it is very important to examine our extracts in terms of chelating activities and the ability of water and ethanol extracts to compete with ferrozine to form chelates with Fe 2+ ions in the reaction medium compared with the standard chelating agent EDTA.…”

Modern and traditional cooking methods affect the antioxidant activity and phenolic compounds content of Trachystemon Orientalis (L.) G. Don

“…It was also determined to have antioxidant, antifungal and herbicide properties [1,5]. In addition to being very rich in phenolic compounds, the plant was also found to have higher antioxidant properties than asparagus and broccoli when the antioxidant activity was examined [6]. This plant is cooked and consumed in various regions of the Black Sea, stems and leaves of Trachystemon orientalis (L.) G. Don can be consumed together or separately.…”