Chemical composition, antibacterial and antioxidant activities of a new essential oil chemotype of Algerian Artemisia arborescens L.

Abstract

The aim of the present study is to investigate the chemical composition, antibacterial and antioxidant activities of three essential oils extracted by hydrodistillation from the aerial parts of Artemisia arborescens L., which was collected from three different regions near Tlemcen city in the West Northern of Algeria: Beni Snous, Bidar and Chetouane. The chemical composition was investigated using both capillary gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS) techniques. Fifty-two compounds were detected, a total of fifty compounds, representing 81.8 to 90.2% of the total oils were identified in the three samples of essential oils. The essential oils of A. arborescens were rich in camphor (Beni Snous: 72.2%, Bidar: 50.3% and Chetouane: 32.8%). The present composition of the essential oils, with camphor as the only most abundant component, was considered as a new chemotype of A. arborescens growing in West Northern of Algeria. Antibacterial activity of the essential oils against gram-positive and gram-negative bacteria, was tested using the diffusion method and by determining the inhibition zone. The results showed that the oils had a great potential antibacterial activity against some bacteria. The maximum zone of inhibition was obtained against Enterococcus faecalis (22 mm). In contrast, the oils were ineffective on the inactivation of Lysteria monocytogenes and Escherichia coli. Antioxidant capacity was assessed by in vitro tests using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and significant activity was found for these A. arborescens oils.

Antioxidant and Antimicrobial Activities of Exopolysaccharides from Yoghurt Starter

“…DPPH-radical scavenging activity of the EPS and control was measured according to the method described by Younes et al (2012) [10] with some changes. 50 µl of various concentrations (0.02-0.1 mg/ml) of EPS was added to 1.950 ml of methanolic solution containing DPPH (1,1-Diphenyl-2-picryhydrazyl) radicals (2.4 mg DPPH was dissolved in 100 ml of methanol).…”

Use of the aqueous extract of Eucalyptus microcorys for the treatment in microcosm, of water containing Enterococcus faecalis: hierarchisation of cells' inhibition factors

“…Other compounds, such as furocoumarins, can inhibit DNA replication and stop the growth of microorganisms in the aquatic environment (Serrano et al 2008). It has also been shown in vitro that the essential oils of E. microcorys have a strong antibacterial activity against E. faecalis and Salmonella typhimurium (Younes et al 2012), but the degrees of inhibition of these oils vary according to the bacteria species.…”

The Artemisia Genus: A Review on Traditional Uses, Phytochemical Constituents, Pharmacological Properties and Germplasm Conservation

“…Several other biological activities such as phyto-toxicity [92]. Anti-bacterial and anti-viral properties [93,94] have also been reported in the plant extracts. Aqueous extract of aerial parts inhibits the growth of Listeria monocytogenes and thus exhibits its anti-bacterial potential [91].…”