Binary ethanol–water solvents affect phenolic profile and antioxidant capacity of flaxseed extracts

Abstract

extracts. This study indicates that the mixture of ethanol and water in proportion of 60:40 (v/v) is the most suitable to obtain flaxseed extract with the high content of phenolic compounds and antioxidant activity.

Chemical Composition, Total Phenols and Flavonoids Contents and Antioxidant Activity as Nutritive Potential of Roasted Hazelnut Skins (Corylus avellana L.)

“…Otherwise, HS extracts I-III showed similar and very high antioxidant activity (Table 3). 50% Ethanol HS extract II has the highest antioxidant activity showing similar results with study that solvent ethanol/water 60/40 (v/v) was the most suitable to get flaxseed extract with the highest antioxidant activity [40]. Actually, the antioxidant activity of I-III is more than 15 times higher than for the roasted Tombul hazelnut skin (EC 50 = 1.01 mg/mL) [8] and I-III extracts show almost the same efficiency to scavenge DPPH radical as antioxidant vitamin C with EC 50 of 0.046 mg/mL (Table 3).…”

Changes in oxidative stability and protein profile of flaxseeds resulting from thermal pre‐treatment

“…the scavenging of DPPH· free radical at the concentration of 50 µmol L −1 in buffered methanol; buffered methanol was a mixture of methanol and 100 mmol L −1 acetic buffer, pH 5.57, in proportion of 3:2) and an ORAC_FL assay by Ou et al . were carried out following previously described procedures . Three independent analyses were performed for each extract.…”

“…the scavenging of DPPH· free radical at the concentration of 50 μmol L −1 in buffered methanol; buffered methanol was a mixture of methanol and 100 mmol L −1 acetic buffer, pH 5.57, in proportion of 3:2) and an ORAC_FL assay by Ou et al 22 were carried out following previously described procedures. 23 Three independent analyses were performed for each extract. Stock solutions of the extracts were prepared daily and then diluted in appropriate solvents to obtain solutions at the concentrations within the assay activity ranges (final concentrations for the DPPH• assay ranged from 0.02 to 0.06 and 0.20 to 0.60 g L −1 , and for ORAC_FL assay were 0.025 and 0.250 g L −1 in the case of ethanolic and aqueous extracts, respectively).…”

Effect of liver pâté enrichment with flaxseed oil and flaxseed extract on lipid composition and stability

“…The ethanol flaxseed extract (FE) was obtained from ground defatted seed ( Linum usitatissimum L.) of the Polish Szafir variety (brown seeded) at the Department of Gastronomy Science and Functional Food, Poznań University of Life Sciences, Poland, according to the procedure described by the author in earlier publications . Briefly, the defatted flaxseed was extracted with 60% aqueous ethanol solution (in the proportion of 1: 7.5, w/v).…”