Antioxidant and free radical-scavenging properties of seeds flavonoids extract of Cedrus atlantica Manetti , Linum usitatissimum L. and Ocimum basilicum L. species.

This work aims to evaluate the antioxidant activity of seeds flavonoids extract of Cedrusatlantica Manetti (Pinaceae), Linum usitatissimum L. (Linaceae) and Ocimum basilicum L. (Lamiaceae) species by using the 2,2-diphenyl-1-picrylhydrazyl(DPPH) method. In DPPH scavenging assay the IC50value of the extract was found to be respectively 0.40, 1.21 and 0.41 mg.ml-1while to the IC50 value of the reference standard Butylated hydroxytoluene (BHT) was 0.003 mg.ml-1. The seeds flavonoids extract of C. atlantica Manetti had a strong scavenger power of free radicals. This study suggests that the mean species may act as a providing antioxidant properties and offering effective protection from free radicals. Then, it’s necessary to identify and isolate the compounds that are responsible to the antioxidant activity.

Bacteriostatic and Bactericidal Profile of Leaves and Twigs Essential oils of Moroccan Pistacia lentiscus L.

In order to increase the Moroccan Pistacia lentiscus L. value, the antibacterial activity of its twig’s and leave’s essential oils was evaluated. The study of antibacterial activity was performed on Gram positive bacteria Bacillus subtilis, Staphylococcus aureus and Gram-negative bacteria Escherichia coli, Pseudomonas aeruginosa by the microdilution method. The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) values of leaves and twigs essential oils against the four studied strains were determined and showed that both essential oils tested have remarkable antibacterial activity. Bacillus subtilis was the most sensitive strain against the two essential oils while Pseudomonas aeruginosa was the most resistant one.