Abstract
The objective of the present work was to study the antioxidant activity of the aqueous extract and the antibacterial activity of the Rosmarinus officinalis aerial part essential oils. The Rosemary essential oil yield was equal to 1.47%. A great inhibitory power of Rosemary extract was revealed by the test of antioxidant activity (93.72%) by an IC50 of 16.95 µg/ml, which was superior to that of Butylated hydroxy anisol (BHA a synthetic antioxidant) (6.01µg/ml), and of ascorbic acid (1.27µg/ml). The essential oil antibacterial activity was evaluated against five bacterial strains, using the aromatogram method. Hence, a remarkable antibacterial activity was noted for Rosemary essential oil. Gram-positive bacteria were highly sensitive to the activity of this essential oil than the Gram-negative bacteria. Furthermore, pharmacological investigation of the plant aqueous extract revealed the plant had very important pharmaceutical effects (anti-inflammatory effect). The preliminary study of toxicity, according to oral voice, revealed that the Rosmarinus officinalis leaves were not toxic.
Highlights
IntroductionThe majority of the world’s inhabitants use many plants, either for seasoning or as a remedy in traditional medicine
Since antiquity, human beings have used aromatic plants (Bojase et al, 2001).Today, the majority of the world’s inhabitants use many plants, either for seasoning or as a remedy in traditional medicine
The bacterial species that were tested for antibacterial activity with Rosmarinus officinalis essential oil included: two strains from the international collection ATCC (American Type Culture Collection): Pseudomonas aeruginosa ATCC 25763 and Staphylococcus aureus ATCC 25843, and three isolated strains from patients from Chlef Hospital (H): (Escherichia. coli (H), Bacillus sp (H) and Streptococcus sp (H))
Summary
The majority of the world’s inhabitants use many plants, either for seasoning or as a remedy in traditional medicine. These plants represent a huge reservoir of potential compounds, attributed to secondary metabolites that possess a wide variety of biological activities (Dorman and Deans, 2000). It’s an aromatic herb of the Lamiaceae family, widely used in pharmaceuticals and traditional medicine and appreciated for its antimicrobial, antispasmodic, emmenagogues and anti-tumor properties, (Ait Bekkara et al, 2007). Recent researches have focused on the study of the antioxidant, and antimicrobial molecules of polyphenols and essential oils of this herb. We have objectified the study of antioxidant and antimicrobial activity of Rosmarinus officinalis, harvested from the region of Chlef (North- West of Algeria), as well as, determination of the anti-inflammatory activity of its aqueous extract
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