Antioxidant activity and phenolic profile of different organs of <i>Pistacia atlantica</i> Desf. subsp. <i>atlantica</i> from Algeria

<p>The present study evaluated the antioxidant activity of 21 extracts prepared from seven parts of <i>Pistacia atlantica</i> Desf. subsp<i>. atlantica</i>. (Fruits, leaves, buds, stems, roots, internal and external trunk barks) collected from Tlemcen, Algeria. Total phenolic, flavonoid and flavonol contents were determined and the antioxidant properties were measured using different assays: 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), ferric antioxidant reducing power and <i>β</i>-carotene bleaching assay. BHA (butylated hydroxyanisole) was used for comparison purposes. The results showed that the extracts of leaves and buds had the highest phenolic contents with 255.789 ± 4.733 and 233.946 ± 6.205 mg GAE/g DM, respectively. For the antioxidant activity, values of EC₅₀ concentrations ranged from 0.059 to 5.712 mg/mL for DPPH, 0.015 to 3.141 mg/mL for reducing power and 0.068 to 5.021 mg/mL for <i>β</i>-carotene method, for all studied extracts. Analysing the phenolic composition, 10 components were identified in different parts of the plant.</p

Identification of phenolic compounds from the leaf part of <i>Teucrium pseudo</i>-<i>Scorodonia</i> Desf. collected from Algeria

<p>In the present paper,we reported for the first time, the identification of the phenolic compounds in butanolic fraction obtained from the leaf part of <i>Teucrium pseudo</i>-<i>Scorodonia</i> Desf. collected from Algeria using RP-HPLC-PDA (Reversed Phase High Performance Liquid Chromatography/Photo Diode Array) technique. Several standards were used for this purpose. The analysis led to the identification of six phenolic acids (ferulic, sinapic, rosmarinic, syringique, caffeic, p-coumaric acids) and one flavonoid (rutin), the last one, has interesting pharmacological properties.</p