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Correlation of antimicrobial activities of various essential oils and their main aromatic volatile constituents / Martina Höferl in The journal of essential oil research, Vol. 21 N° 5 (Septembre/Octobre 2009) 

Public ISBD [article]  in The journal of essential oil research > Vol. 21 N° 5 (Septembre/Octobre 2009) . - pp. 459-463 Titre : Correlation of antimicrobial activities of various essential oils and their main aromatic volatile constituents Type de document : texte imprimé Auteurs : Martina Höferl, Auteur ; Gerhard Buchbauer, Auteur ; Leopold Jirovetz, Auteur Article en page(s) : pp. 459-463 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Antimicrobial  activity  Carvacrol  Carveol  m-cresol  o-cresol  p-cresol  p-cymene  Eugenol  Thymol  Essential  oils  Cinnamomum  zeylanicum  Origanum  vulgare  Pimenta  dioica  Pimenta  racemosa  Satureja  hortensis  Syzygium  aromaticum  Thymus  vulgaris  Trachyspermum  ammi  Olfactory  description Index. décimale : 646 Résumé : The pure aromatic volatiles p-cymene, carvacrol, eugenol and thymol as well as commercial essential oils of Cinnamomum zeylanicum, Origanum vulgare, Pimenta dioica, Pimenta racemosa, Satureja hortensis, Syzygium aromaticum, Thymus vulgaris and Trachyspermum ammi were investigated concerning antimicrobial activities. Therefore, these samples and, as reference substances, synthetic antibiotics and the natural antimicrobial components carveol, m-, o- and p-cresol were tested against strains of two Gram-positive and five Gram-negative bacteria and the yeast Candida albicans using agar dilution and agar diffusion methods. The analysis of the chemical composition of the essential oils by means of GC and GC/MS focusing on aromatic volatiles produced the following results: C. zeylanicum: eugenol (74.9%); O. vulgare: carvacrol (66.1%) and p-cymene (9.2%); P. dioica: eugenol (76.0%); P. racemosa: eugenol (45.6%); S. hortensis: carvacrol (41.5%), p-cymene (10.7%) and thymol (8.7%); S. aromaticum: eugenol (76.8%); T. vulgaris: thymol (43.4%), p-cymene (23.5%) and carvacrol (4.1%); T. ammi: thymol (43.7%) and p-cymene (17.7%). All investigated aromatic volatiles and essential oils exhibited strong effects against the yeast Candida albicans and medium to strong antimicrobial activity against the Gram-positive bacteria Staphylococcus aureus and Enterococcus faecalis and the Gram-negative bacteria Escherichia coli, Klebsiella pneumoniae, Proteus vulgaris, and Salmonella sp., whereas weaker effects were observed against Pseudomonas aeruginosa. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/42#top [article] Correlation of antimicrobial activities of various essential oils and their main aromatic volatile constituents [texte imprimé] / Martina Höferl, Auteur ; Gerhard Buchbauer, Auteur ; Leopold Jirovetz, Auteur . - pp. 459-463. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 21 N° 5 (Septembre/Octobre 2009) . - pp. 459-463 Mots-clés : Antimicrobial  activity  Carvacrol  Carveol  m-cresol  o-cresol  p-cresol  p-cymene  Eugenol  Thymol  Essential  oils  Cinnamomum  zeylanicum  Origanum  vulgare  Pimenta  dioica  Pimenta  racemosa  Satureja  hortensis  Syzygium  aromaticum  Thymus  vulgaris  Trachyspermum  ammi  Olfactory  description Index. décimale : 646 Résumé : The pure aromatic volatiles p-cymene, carvacrol, eugenol and thymol as well as commercial essential oils of Cinnamomum zeylanicum, Origanum vulgare, Pimenta dioica, Pimenta racemosa, Satureja hortensis, Syzygium aromaticum, Thymus vulgaris and Trachyspermum ammi were investigated concerning antimicrobial activities. Therefore, these samples and, as reference substances, synthetic antibiotics and the natural antimicrobial components carveol, m-, o- and p-cresol were tested against strains of two Gram-positive and five Gram-negative bacteria and the yeast Candida albicans using agar dilution and agar diffusion methods. The analysis of the chemical composition of the essential oils by means of GC and GC/MS focusing on aromatic volatiles produced the following results: C. zeylanicum: eugenol (74.9%); O. vulgare: carvacrol (66.1%) and p-cymene (9.2%); P. dioica: eugenol (76.0%); P. racemosa: eugenol (45.6%); S. hortensis: carvacrol (41.5%), p-cymene (10.7%) and thymol (8.7%); S. aromaticum: eugenol (76.8%); T. vulgaris: thymol (43.4%), p-cymene (23.5%) and carvacrol (4.1%); T. ammi: thymol (43.7%) and p-cymene (17.7%). All investigated aromatic volatiles and essential oils exhibited strong effects against the yeast Candida albicans and medium to strong antimicrobial activity against the Gram-positive bacteria Staphylococcus aureus and Enterococcus faecalis and the Gram-negative bacteria Escherichia coli, Klebsiella pneumoniae, Proteus vulgaris, and Salmonella sp., whereas weaker effects were observed against Pseudomonas aeruginosa. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/42#top