Antioxidant capacity and fatty acid profile of Centaurea kotschyi (Boiss. & Heldr.) Hayek var. persica (Boiss.) Wagenitz from Turkey

作者：Zengin Gokhan; Guler Gokalp O; Cakmak Yavuz S; Aktumsek Abdurrahman^*

来源：Grasas y Aceites, 2011, 62(1): 90-95.

DOI：10.3989/gya.056010

• beta-carotene/Linoleic acid system
• Centaurea kotschyi
• Fatty acid composition
• Reducing power
• Total antioxidant capacity
• Total phenolic content

The antioxidant capacity of the methanolic extract and the fatty acid composition of C. kotschyi var. persica were investigated. Six different chemical methods were used to determine the antioxidant capacity. The fatty acid composition was analyzed using gas chromatography. The IC(50) value of the extract was determined as 37.09 mu g/ml (in the DPPH assay). In the beta-carotene/linoleic acid system, the extract exhibited 65.22% inhibition against linoleic acid oxidation. The amount of total phenolic content and total antioxidant capacity were detected as 36.52 mg gallic acid equivalent (GAE)/g and 74.93 mg ascorbic acid equivalent (AE)/g, respectively. The major fatty acid in the composition of C. kotschyi var. persica was found to be C 18:3 omega 3 (alpha-linolenic acid) by GC analysis. The results presented here indicate that C. kotschyi var. persica possess strong antioxidant properties. Therefore, the species can be used as a natural additive in food, cosmetic and pharmaceutical industries.

• 出版日期2011-3