Volume 18, Issue 113 (july 2021)
Abstract
The propose of this study is evaluation effects of different solvents on antioxidant activity and phenol and flavonoid content of Postia puberula (Asteracea). The obtained ethanol, methanol, water and hydroalchol extract were investigated for antioxidant activity and phenol and flavonoid content. The antioxidant activity were measured by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and β-carotene/linoleic acid assay, also phenol and flavonoid content were measured by gallic acid and quercetin as standard compound. The result of this study showed that the the different solvents can effective on antioxidant activity, phenol and flavonoid content so that, in both method hydroalchol extract has more antioxidant activity, also hydroalchol extract has more phenol, but more flavonoid observed in ethanolic extract
Volume 21, Issue 152 (October 2024)
Abstract
In this study, the essential oil composition, antioxidant activities, phenolic and flavonoid contents, and of metanolic extract of Iranian and Afghanestanian populations of Ferula assa-foetida were evaluated. Essential oils were analyzed by using GC and GC/MS, The antioxidant activity were measured by 2, 2-diphenyl-1-picrylhydrazyl and β-carotene/linoleic acid assay, also phenol and flavonoid content were measured by gallic acid and quercetin as standard compound. Result showed that propenyl sec butyl disulfide (42.72%), acetone, dimethyl mercaptole (14.84%) and gamma- eudesmol (8.6%) were the main compouned found in the Iranian population while; the Afghanestanian population were rich of propenyl sec butyl disulfide (39.61%), acetone, dimethyl mercaptole (18.25%) and 8-ethyl-pentathiadecane (18.97%). In DPPH and β-carotene/linoleic acid tests, Iranian and Afghanestanian populations have stronger antioxidant activity respectively, also, the results demonstrated that the Afghanestanian population have more phenolic and flavonoid contents than the Iranian population. Overall, the results showed that the two populations investigated in this research have differences in terms of the type and percentage of essential oil compounds, antioxidant activity and phenol and flavonoid content. These differences are probably caused by differences in ecological factors such as the habitats of these populations and the influence of these factors on the studied parameters.
Key words: propenyl sec-butyl disulfide, dimethyl mercaptol acetone, DPPH, β-carotene/linoleic acid
