ABSTRACT
The present study evaluates the chemical composition and antimicrobial activity of essential oils (EOs) of Juniperus Phoenicea of five localities from eastern Algeria. The analysis and identification of the components of the Eos was performed using the (GC-MS). The average yield of essential oil of the samples is 0.82%. The chemical composition of the EOs of J. Phoenicea is dominated by the presence of a major product, α-pinene (36.3-55.9%). Three components are represented with large concentrations, terpinolene (0-13%), Δ3-carene (0- 12.4%) and the β-phellandrene (0-7.3%). Our investigation allows us to support the species Juniperus phoenicea of eastern Algeria has several variability quantitative and qualitative. The antimicrobial activity of the essential oils of J. phoenicea was evaluated against nine bacteria. The results showed a variable degree of antibacterial activity being the population Elhadjaz most effective.
ABSTRACT
The chemical composition of essential oil isolated from Chrysanthemum fontanesii and C. coronarium by hydrodistillation, was analysed by GC and GC/MS. A total 66 compounds representing 97.9% of the oil were identified in C. fontanesii, and 44 components representing 97.2% of the total oil in C. coronarium. The chemical composition of C. fontanesii and C. coronarium, is very different, the only common components are α-pinene, β- pinene, myrcene and Δ3-carene. The Essential oil of C. fontanesii and C. coronarium was tested for antibacterial activity against nine bacteria strains. The oil showed modest effect against Staphylococcus aureus ATCC 25923, and it has no significant antibacterial activity against the other bacteria tested. The population of C. fontanesii studied showed a diploid chromosome number 2n = 2x = 18 and a tetraploid 2n = 4x = 36 for C. coronarium.