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Composition analysis and antimicrobial activity of essential oil from leaves of Laurus nobilis grown in Oman

Journal of Bioresources and Bioproducts 2022年第4期7卷 328-334页

作者： Siham Saleh Al-Abri Sadri Abdullah Said Salem Said Al Touby Mohammed Amzad Hossain Jamal Nasser Al-Sabahi School of Pharmacy College of Pharmacy and NursingUniversity of NizwaPB 33PO 616NizwaNizwa 616Oman School of Nursing College of Pharmacy and NursingUniversity of NizwaNizwa 616Oman Central Instrument Laboratory College of Agriculture and Marine SciencesSultan Qaboos UniversityMuscat 123Oman

Traditionally,Laurus nobilis is used for the treatment of earaches and skin rashes as well as rheuma-tism.The most common technique to isolate the oil is hydro-distillation and steam-distillation.The investigation presented in this paper was aimed to unravel the antimicrobial activity and chemical composition of essential oil in the leaves of L.nobilis grown in Oman.The essential oil was extracted from the leave of the selected plant species by hydro distillation using clevenger type apparatus.The antimicrobial assay was done by disc diffusion methods against three bac-terial strains,Staphylococcus aureus,Pseudomonas aeruginosa and Escherichia coli,and one fungal strain:Candida albicans.The isolated essential oil was analyzed by gas chromatography-mass spectrometry(GC-MS).The percentage yield of the essential oil was 0.064%(w/w).The essen-tial oil was found actively against the applied bacterial and fungal strains.The highest activity was found against S.aureus and the lowest was against E.coli,and the order was S.aureus>P.aeruginosa>E.coli.The essential oil was also active against the fungus C.albicans.The range of inhibition zones was 6-14 mm.The results of GC-MS analysis showed(E)-𝛽-caryophyllene to be the major component about 59.62%.Other major components included𝛼-selinene(14.03%),𝛼-humulene(8.65%),𝛽-selinene(4.99%),and𝛼-pinene(4.98%).In addition,several minor com-ponents were found in the essential oil of L.nobilis.Based on the experimental results,it showed that the plant species that grown in Oman were a potential source of therapeutic agents.In con-clusion,the essential oil and the plant could be used as natural and potential therapeutic agents to treat earaches,skin rashes,and rheumatism.

关键词： Laurus nobilis clevenger apparatus Essential oil Antimicrobial activity Gas chromatography-mass spectrometry(GC-MS)

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