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Détail de l'auteur
Auteur Y. Sivasothy
Documents disponibles écrits par cet auteur
Affiner la rechercheChemical composition and antibacterial activities of essential oils from Zingiber spectabile Griff / Y. Sivasothy in The journal of essential oil research, Vol. 24 N° 3 (Juin 2012)
in The journal of essential oil research > Vol. 24 N° 3 (Juin 2012) . - pp. 305-313
Titre : Chemical composition and antibacterial activities of essential oils from Zingiber spectabile Griff Type de document : texte imprimé Auteurs : Y. Sivasothy, Auteur ; K. Awang, Auteur ; H. Ibrahim, Auteur Année de publication : 2012 Article en page(s) : pp. 305-313 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Zingiber spectabile Griff Zingiberaceae Essential oil composition Antibacterial activity Zerumbone β-caryophyllene β-elemene Résumé : The essential oils of the leaves and rhizomes of Zingiber spectabile Griff. were analyzed by capillary gas chromatography (GC) and GC–mass spectrometry (GC–MS) following the isolation by hydrodistillation. In total, 80 compounds were identified in its leaf and rhizome oils. Both oils were sesquiterpenic in nature but with distinctly different odors. The most abundant components in the leaf oil were β-caryophyllene (21.3%) and β-elemene (12.5%), whereas the rhizomes yielded an oil rich in zerumbone (59.1%). The antibacterial activities of both oils against multidrug-resistant strains and food-borne pathogens were evaluated by the disc diffusion assay and by determining their minimum inhibitory concentration (MIC) values. The leaf oil was inactive against all tested microorganisms, whereas the rhizome oil exhibited weak activity against Escherichia coli, Salmonella enteritidis, Salmonella typhi, Salmonella typhimurium, Shigella flexneri, Klebsiella pneumoniae, Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus (MRSA). ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.676803 [article] Chemical composition and antibacterial activities of essential oils from Zingiber spectabile Griff [texte imprimé] / Y. Sivasothy, Auteur ; K. Awang, Auteur ; H. Ibrahim, Auteur . - 2012 . - pp. 305-313.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 24 N° 3 (Juin 2012) . - pp. 305-313
Mots-clés : Zingiber spectabile Griff Zingiberaceae Essential oil composition Antibacterial activity Zerumbone β-caryophyllene β-elemene Résumé : The essential oils of the leaves and rhizomes of Zingiber spectabile Griff. were analyzed by capillary gas chromatography (GC) and GC–mass spectrometry (GC–MS) following the isolation by hydrodistillation. In total, 80 compounds were identified in its leaf and rhizome oils. Both oils were sesquiterpenic in nature but with distinctly different odors. The most abundant components in the leaf oil were β-caryophyllene (21.3%) and β-elemene (12.5%), whereas the rhizomes yielded an oil rich in zerumbone (59.1%). The antibacterial activities of both oils against multidrug-resistant strains and food-borne pathogens were evaluated by the disc diffusion assay and by determining their minimum inhibitory concentration (MIC) values. The leaf oil was inactive against all tested microorganisms, whereas the rhizome oil exhibited weak activity against Escherichia coli, Salmonella enteritidis, Salmonella typhi, Salmonella typhimurium, Shigella flexneri, Klebsiella pneumoniae, Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus (MRSA). ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.676803
in The journal of essential oil research > Vol. 22 N° 6 (Novembre/Décembre 2010) . - pp. 533-535
Titre : Essential oils of elettariopsis curtisii bak. Type de document : texte imprimé Auteurs : K.C. Wong, Auteur ; Y. Sivasothy, Auteur ; P. L. Boey, Auteur Année de publication : 2011 Article en page(s) : pp. 533-535 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Elettariopsis curtisii Zingiberaceae Essential oil composition β-pinene β-phellandrene Index. décimale : 646 Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Elettariopsis curtisii Bak. were analyzed by capillary GC and GC/MS. The oils were dominated by monoterpenes, the major components being β-pinene and β-phellandrene, contributing 42.7% and 19.9%, respectively, to the leaf oil, and 29.6% and 17.6%, respectively, to the oil of the rhizomes and roots. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700392 [article] Essential oils of elettariopsis curtisii bak. [texte imprimé] / K.C. Wong, Auteur ; Y. Sivasothy, Auteur ; P. L. Boey, Auteur . - 2011 . - pp. 533-535.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 22 N° 6 (Novembre/Décembre 2010) . - pp. 533-535
Mots-clés : Elettariopsis curtisii Zingiberaceae Essential oil composition β-pinene β-phellandrene Index. décimale : 646 Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Elettariopsis curtisii Bak. were analyzed by capillary GC and GC/MS. The oils were dominated by monoterpenes, the major components being β-pinene and β-phellandrene, contributing 42.7% and 19.9%, respectively, to the leaf oil, and 29.6% and 17.6%, respectively, to the oil of the rhizomes and roots. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700392
in The journal of essential oil research > Vol. 18 N° 2 (Mars-Avril 2006) . - pp. 203-205
Titre : Essential oils of elettariopsis slahmong C.K. lim Type de document : texte imprimé Auteurs : K.C. Wong, Auteur ; Y. Sivasothy, Auteur Année de publication : 2006 Article en page(s) : pp. 203-205 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Elettariopsis slahmong Zingiberaceae Essential oil composition (E)-2-octenal (E)-2-decenal Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Elettariopsis slahmong C.K. Lim were analyzed by capillary GC and GC/MS. Thirty-two compounds were identified in the leaf oil, among which aldehydes predominated. The most abundant components were (E)-2-octenal (46.3%) and (E)-2-decenal (36.8%). The rhizomes and roots yielded oil also rich in aldehydes with a “stink bug” odor similar to the leaves, but (E)-2-decenal (79.4%) was clearly the most abundant among the 19 constituents identified. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699066#.Ua3Qx9gYrOl [article] Essential oils of elettariopsis slahmong C.K. lim [texte imprimé] / K.C. Wong, Auteur ; Y. Sivasothy, Auteur . - 2006 . - pp. 203-205.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 18 N° 2 (Mars-Avril 2006) . - pp. 203-205
Mots-clés : Elettariopsis slahmong Zingiberaceae Essential oil composition (E)-2-octenal (E)-2-decenal Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Elettariopsis slahmong C.K. Lim were analyzed by capillary GC and GC/MS. Thirty-two compounds were identified in the leaf oil, among which aldehydes predominated. The most abundant components were (E)-2-octenal (46.3%) and (E)-2-decenal (36.8%). The rhizomes and roots yielded oil also rich in aldehydes with a “stink bug” odor similar to the leaves, but (E)-2-decenal (79.4%) was clearly the most abundant among the 19 constituents identified. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699066#.Ua3Qx9gYrOl
in The journal of essential oil research > Vol. 18 N° 5 (Septembre-Octobre 2006) . - pp. 569-571
Titre : Essential oils of elettariopsis smithiae Y. K. kam and E. rugosa (Y. K. Kam) C.K. lim Type de document : texte imprimé Auteurs : K.C. Wong, Auteur ; Y. Sivasothy, Auteur ; P. L. Boey, Auteur Année de publication : 2006 Article en page(s) : pp. 569-571 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Elettariopsis smithiae Elettariopsis rugosa Zingiberaceae Essential oil composition Geranial Neral Camphene α-fenchyl acetate Spathulenol β-phellandrene β-pinene Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Elettariopsis smithiae Y.K. Kam and Elettariopsis rugosa (Y.K. Kam) C.K. Lim were analyzed by capillary GC and GC/MS. The oils of E. smithiae were dominated by monoterpenoids, the major components were geranial (38.1%) and neral (29.1%) in the leaf oil, and camphene (22.9%) and α-fenchyl acetate (15.7%) in the oil from the rhizomes and roots. The leaf oil of E. rugosa contained high levels of sesquiterpenoids, particularly spathulenol (29.5%), while the oil of the rhizomes and roots contained mainly monoterpenoids, with β-phellandrene (26.2%) and camphene (15.2%) being clearly the two most abundant components. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699170#.UXmNuUqC5mN [article] Essential oils of elettariopsis smithiae Y. K. kam and E. rugosa (Y. K. Kam) C.K. lim [texte imprimé] / K.C. Wong, Auteur ; Y. Sivasothy, Auteur ; P. L. Boey, Auteur . - 2006 . - pp. 569-571.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 18 N° 5 (Septembre-Octobre 2006) . - pp. 569-571
Mots-clés : Elettariopsis smithiae Elettariopsis rugosa Zingiberaceae Essential oil composition Geranial Neral Camphene α-fenchyl acetate Spathulenol β-phellandrene β-pinene Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Elettariopsis smithiae Y.K. Kam and Elettariopsis rugosa (Y.K. Kam) C.K. Lim were analyzed by capillary GC and GC/MS. The oils of E. smithiae were dominated by monoterpenoids, the major components were geranial (38.1%) and neral (29.1%) in the leaf oil, and camphene (22.9%) and α-fenchyl acetate (15.7%) in the oil from the rhizomes and roots. The leaf oil of E. rugosa contained high levels of sesquiterpenoids, particularly spathulenol (29.5%), while the oil of the rhizomes and roots contained mainly monoterpenoids, with β-phellandrene (26.2%) and camphene (15.2%) being clearly the two most abundant components. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699170#.UXmNuUqC5mN
in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 461-466
Titre : Essential oils of etlingera elatior (Jack) R. M. smith and etlingera littoralis (Koenig) giseke Type de document : texte imprimé Auteurs : K.C. Wong, Auteur ; Y. Sivasothy, Auteur ; P. L. Boey, Auteur Année de publication : 2011 Article en page(s) : pp. 461-466 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Etlingera elatior Etlingera littoralis Zingiberaceae Essential oil composition Camphene α-pinene β-pinene Dodecanol Dodecanal (E)-methyl isoeugenol Index. décimale : 646 Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Etlingera elatior (Jack) R. M. Smith and a white-flowered variety known as Thai queen, and Etlingera littoralis (Koenig) Giseke were analyzed by capillary GC and GC/MS. The oils of E. elatior were dominated by mono- and sesquiterpenoids, with the major components being myrcene (13.5%), α-humulene (11.8%) and β-caryophyllene (10.7%) in the leaf oil, and camphene (18.0%) and β-pinene (16.9%) in the oils from the rhizomes and roots, respectively. The oil profiles of the Thai queen cultivar were similar, except for a much higher level of α-pinene (24.4%) and a lower concentration of myrcene in the leaf oil, and markedly increased proportions of dodecanol and dodecanal in both the oil of the leaves (18.9% and 15.9%, respectively) and that of the rhizomes and roots (12.9% and 10.6%, respectively). The oils of E. littoralis were characterized by high levels of phenylpropanoids, principally (E)-methyl isoeugenol at 37.7% in the leaf oil and 58.1% in the oils from the rhizomes and roots, the complete absence of non-terpenic aliphatic alcohols and aldehydes, and the occurrence of 8(14), 15-sandaracopimaradien-3β-ol and 7, 15-isopimaradien-3β-ol. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700372 [article] Essential oils of etlingera elatior (Jack) R. M. smith and etlingera littoralis (Koenig) giseke [texte imprimé] / K.C. Wong, Auteur ; Y. Sivasothy, Auteur ; P. L. Boey, Auteur . - 2011 . - pp. 461-466.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 461-466
Mots-clés : Etlingera elatior Etlingera littoralis Zingiberaceae Essential oil composition Camphene α-pinene β-pinene Dodecanol Dodecanal (E)-methyl isoeugenol Index. décimale : 646 Résumé : The essential oils obtained by hydrodistillation of the leaves, rhizomes and roots of Etlingera elatior (Jack) R. M. Smith and a white-flowered variety known as Thai queen, and Etlingera littoralis (Koenig) Giseke were analyzed by capillary GC and GC/MS. The oils of E. elatior were dominated by mono- and sesquiterpenoids, with the major components being myrcene (13.5%), α-humulene (11.8%) and β-caryophyllene (10.7%) in the leaf oil, and camphene (18.0%) and β-pinene (16.9%) in the oils from the rhizomes and roots, respectively. The oil profiles of the Thai queen cultivar were similar, except for a much higher level of α-pinene (24.4%) and a lower concentration of myrcene in the leaf oil, and markedly increased proportions of dodecanol and dodecanal in both the oil of the leaves (18.9% and 15.9%, respectively) and that of the rhizomes and roots (12.9% and 10.6%, respectively). The oils of E. littoralis were characterized by high levels of phenylpropanoids, principally (E)-methyl isoeugenol at 37.7% in the leaf oil and 58.1% in the oils from the rhizomes and roots, the complete absence of non-terpenic aliphatic alcohols and aldehydes, and the occurrence of 8(14), 15-sandaracopimaradien-3β-ol and 7, 15-isopimaradien-3β-ol. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700372
