| Institution: | 1. Laboratoire de biochimie et de toxicologie environnementale, Faculté des sciences, Université Badji Mokhtar, Annaba, Algeria;2. Laboratoire de biochimie et de microbiologie appliquées, Faculté des sciences, Université Badji Mokhtar, Annaba, Algeria;3. Laboratoire d’Electrochimie et Environnement, Ecole Nationale d’Ingénieur de Sfax, BP 1173, 3038 Sfax, Université de Sfax, Tunisia;4. Laboratoire d’Eco-Physiologie Animale, Faculté des Sciences de Sfax, Tunisia |
| Abstract: | The aqueous and hydroalcoholic extracts of borage (Borago officinalis) leaves from Annaba region (Algeria) were preliminary analyzed for their phenolic profile (total phenolics, total flavonoids, total flavonols, total tannins and total anthocyanins). These extracts were evaluated for their antioxidant properties by different methods such as DPPH radical scavenging, test NBT and total antioxidant activity. The two extracts have exhibited a high antiradical capacity. Indeed, the ethanolic extract showed the lower IC50 values and the highest amount of phenolics (94.09 ± 1.72 mg gallic acid/g dry extract). Using LC-MS/MS analysis, it was possible to identify phenolic acids, flavonoids, sterol and for the first time oleuropein was identified in the aqueous extract of the plant. The obtained results have demonstrated that phenolic compounds are the major contributor to the antioxidant activity of plants. |
