Determination of antioxidant activity of various extracts of <Emphasis Type="Italic">Parmelia saxatilis</Emphasis> |
| |
Authors: | Tevfik Özen Kadir Kinalio?lu |
| |
Institution: | (1) Department of Chemistry, Arts and Science Faculty, Giresun University, 28049 Giresun, Turkey;(2) Department of Biology, Arts and Science Faculty, Giresun University, 28049 Giresun, Turkey |
| |
Abstract: | The work was conducted with the purpose to evaluate antioxidant activity of Parmelia saxatilis (PS) by different analytical methods. Water and methanol were used as solvents and antioxidative effects were measured by
a ferric thiocyanate method (FTC) and thiobarbituric acid test (TBA). The antioxidant activity increased with the increasing
amount of extracts (from 50 to 250 μg) added to linoleic acid emulsion. The methanol extract of PS exhibited high antioxidative
activity that was not significantly (P < 0.05) different from α-tocopherol, while aqueous extracts of PS showed low antioxidative activity. Similar trends of antioxidant activity were observed
using either the FTC or TBA methods. Antioxidant activity, reducing power, free radical scavenging (DPPH·), superoxide anion radical scavenging, metal chelating and hydrogen peroxide scavenging activities of PS extracts showed
dose dependence and increased with concentration of PS extract. The results obtained in the present study indicate that the
PS might be a potential source of natural antioxidant. |
| |
Keywords: | Parmelia saxatilis antioxidant activity radical scavenging metal chelating total phenol |
本文献已被 SpringerLink 等数据库收录! |
|