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dc.contributor.authorGOUDJIL, Mohamed Bilal-
dc.contributor.authorSegni Ladjel-
dc.description.abstractThis work is part of study of the chemical composition, antibacterial, antifungal and antioxidant activity of aromatic and medicinal plants of the Algerian flora, in order to find new bioactive products of natural source which are characterized by a biological activities spécialy antimicrobial and antioxidant activities. Three aromatic plants from regions of Djelfa, Skikda and Ouargla (Artemisia Herba Alba, Laurus nobilis and Mentha Piperita respectively) have been the subject of a phytochemical and biological decryption to their essential oils. We studied the influence of drying in the shade on the leaves of plants, which enabled us to evaluate the content of essential oils extracted for better control on the quality of the plants and for best industrial exploitation. The three essential oils obtained by steam distillation were analyzed using gas chromatography combined with mass spectrometry. The screening by GC/MS identified 33 components for HE of sagebrush with 42.8% of davanon, 22 constituents for HE of laurel whose 1.8 cineole (45.36%) and finally peppermint containing 23 compounds with Carvone (51.04%). Our results indicate that the oil of Artemisia herba alba showed the highest radical scavenging activity against DPPH radical, followed respectively by those of two species Mentha piperita and Laurus nobilis but remains moderate compared with standard antioxidant employees. Also, the kind of Artimisia herba alba has the largest reducing activity. The antibacterial study of essential oils showed a high inhibitory effect on the growth of the tested germs. Staphylococcus Sp most sensitive to oil of Artemisia Herba alba with an inhibition zone of 23.10 mm. The essential oil of laurel recorded a 20.47 and 21.93 mm inhibition zone against strains of Salmonella enterica and Klebsiella pneumoniae respectively. Finally, the essential oil of Mentha Piperita revealed a 21.47 mm diameter of inhibition against Escherichia coli strains which are most susceptible. The antifungal study against Fusarium moniliforme, Fusarium solani, Fusarium oxysporum and Stemphylium solani strains also reported meaningful results and significant.en_US
dc.subjectEssential oilsen_US
dc.subjectArtemisia herba albaen_US
dc.subjectLaurus nobilisen_US
dc.subjectMentha Piperitaen_US
dc.subjectAntibacterial activityen_US
dc.subjectantifungal activityen_US
dc.subjectantioxidant activityen_US
dc.titleComposition chimique, activité antimicrobienne et antioxydante de trois plantes aromatiques.en_US
Appears in Collections:Département de Génie des procédés - Doctorat

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