Chemical Composition, Characteristics Profiles and Bioactivities of Tunisian<i> Phalaris canariensis </i>Seed: A Potential Source of &#969;-6 and &#969;-9 Fatty Acids

Abstract

Seed oils of Phalaris canariensis extracted by ultrasonication and cold maceration were evaluated for their physical characteristics, fatty acid, sterol composition and total phenol contents as well as for their antioxidant, antibacterial and acetylcholinesterase activities. The physicochemical properties of ultrasonication and cold maceration oils respectively were: acid values (4 and 3.25) mg KOH/g, peroxide values (5.53 and 4.41) meq O 2 Kg-1 , iodine values (88.83 and 95.17) g/100 g of oil, saponification values (119.21 and 98.17) mg KOH/g, phenolic content (36.40 and 53.00) mg gallic acid equivalents/g extract, chlorophylls (0.52 and 0.60) mg/kg oil and carotenoids contents (1.92 and 1.88) mg/kg oil. Gas chromatography analysis revealed that linoleic (52.03 and 52.2%), oleic (31.75 and 31.84%) and palmitic (11.09 and 11.34 %) acids were the major fatty acids in the two oils. The main sterol found in the seed oils was β-sitosterol (48.01 and 47.86%). On the other hand, the evaluation of their DPPH radical scavenging, total antioxidant capacity, antibacterial and acetylcholinesterase activities showed interesting results. Thus, Phalaris canariensis seed oils could deserve further consideration and investigation as a potentially new multipurpose product for agro-food, medicinal and cosmetic uses.

ESI-MS/MS Analysis of Phenolic Compounds from Aeonium arboreum Leaf Extracts and Evaluation of their Antioxidant and Antimicrobial Activities

“…Our LC/MS analysis indicated the presence of active -OH groups in this extract. In this regard, the antioxidant capacity of flavonoid compounds depends on the number of hydroxyl groups [29].…”