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Assessment of similarities and dissimilarities in the essential oils of patchouli and Indian Valerian / Ram S. Verma in The journal of essential oil research, Vol. 24 N° 5 (Octobre 2012) 

Public ISBD [article]  in The journal of essential oil research > Vol. 24 N° 5 (Octobre 2012) . - pp. 487-491 Titre : Assessment of similarities and dissimilarities in the essential oils of patchouli and Indian Valerian Type de document : texte imprimé Auteurs : Ram S. Verma, Auteur ; Rajendra C. Padalia, Auteur ; Amit Chauhan, Auteur Année de publication : 2013 Article en page(s) : pp. 487-491 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Pogostemon  cablin  Valeriana  jatamansi  Essential  oil  Chemical  differentiation  Marker  compounds Résumé : Two chemically alike essential oils derived from two disjunct genera namely patchouli (Pogostemon cablin (Blanco) Benth.) and Indian Valerian (Valeriana jatamansi Jones) were investigated for identification of marker compounds by gas chromatography–flame ionization detection (GC–FID) and GC–mass spectrometry (GC–MS). Inspite of huge chemical resemblance these two essential oils can be authenticated by their characteristics minor or trace constituents. The marker constituents identified for P. cablin oil were pogostone, pogostol, and (Z)-thujopsene, whereas marker constituents for V. jatamansi oil were 3-methyl valeric acid, thymol methyl ether, carvacrol methyl ether, bornyl acetate, kessane, maaliol, xanthorrhizol, and 8-acetoxy patchouli alcohol. These marker constituents may be utilized as an important tool in oil authentications. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.705095 [article] Assessment of similarities and dissimilarities in the essential oils of patchouli and Indian Valerian [texte imprimé] / Ram S. Verma, Auteur ; Rajendra C. Padalia, Auteur ; Amit Chauhan, Auteur . - 2013 . - pp. 487-491. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 24 N° 5 (Octobre 2012) . - pp. 487-491 Mots-clés : Pogostemon  cablin  Valeriana  jatamansi  Essential  oil  Chemical  differentiation  Marker  compounds Résumé : Two chemically alike essential oils derived from two disjunct genera namely patchouli (Pogostemon cablin (Blanco) Benth.) and Indian Valerian (Valeriana jatamansi Jones) were investigated for identification of marker compounds by gas chromatography–flame ionization detection (GC–FID) and GC–mass spectrometry (GC–MS). Inspite of huge chemical resemblance these two essential oils can be authenticated by their characteristics minor or trace constituents. The marker constituents identified for P. cablin oil were pogostone, pogostol, and (Z)-thujopsene, whereas marker constituents for V. jatamansi oil were 3-methyl valeric acid, thymol methyl ether, carvacrol methyl ether, bornyl acetate, kessane, maaliol, xanthorrhizol, and 8-acetoxy patchouli alcohol. These marker constituents may be utilized as an important tool in oil authentications. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.705095

Chemical composition of the aliphatic compounds rich essential oil of hypericum japonicum Thunb. ex Murray from India / Ram S. Verma in The journal of essential oil research, Vol. 24 N° 6 (Décembre 2012) 

Public ISBD [article]  in The journal of essential oil research > Vol. 24 N° 6 (Décembre 2012) . - pp. 501-505 Titre : Chemical composition of the aliphatic compounds rich essential oil of hypericum japonicum Thunb. ex Murray from India Type de document : texte imprimé Auteurs : Ram S. Verma, Auteur ; Rajendra C. Padalia, Auteur ; Amit Chauhan, Auteur Année de publication : 2014 Article en page(s) : pp. 501-505 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Hypericum  japonicum  Hypericaceae  Essential  oil  composition  2-methyl  octane  n-nonane Résumé : Hydro-distilled essential oil of the aerial parts of Hypericum japonicum Thunb. ex Murray (Hypericaceae), grown in northern India was analyzed by gas chromatography (GC) and gas chromatography–mass spectrometry (GC–MS). A total of seventy constituents representing 93.6% of the total composition have been identified. Major constituents of the essential oil were 2-methyl octane (24.9%), n-nonane (21.4%), (2Z)-nonenol (16.5%), n-decanal (8.2%) and allo-aromadendrene epoxide (3.3%). The characteristic of the H. japonicum essential oil was the presence of higher amount of aliphatic compounds (82.5%) compared with terpenoids. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.728082 [article] Chemical composition of the aliphatic compounds rich essential oil of hypericum japonicum Thunb. ex Murray from India [texte imprimé] / Ram S. Verma, Auteur ; Rajendra C. Padalia, Auteur ; Amit Chauhan, Auteur . - 2014 . - pp. 501-505. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 24 N° 6 (Décembre 2012) . - pp. 501-505 Mots-clés : Hypericum  japonicum  Hypericaceae  Essential  oil  composition  2-methyl  octane  n-nonane Résumé : Hydro-distilled essential oil of the aerial parts of Hypericum japonicum Thunb. ex Murray (Hypericaceae), grown in northern India was analyzed by gas chromatography (GC) and gas chromatography–mass spectrometry (GC–MS). A total of seventy constituents representing 93.6% of the total composition have been identified. Major constituents of the essential oil were 2-methyl octane (24.9%), n-nonane (21.4%), (2Z)-nonenol (16.5%), n-decanal (8.2%) and allo-aromadendrene epoxide (3.3%). The characteristic of the H. japonicum essential oil was the presence of higher amount of aliphatic compounds (82.5%) compared with terpenoids. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/full/10.1080/10412905.2012.728082

Variability in volatile terpenoid compositions of peppermint cultivars and some wild accession from northern India / Rajendra C. Padalia in The journal of essential oil research, Vol. 23 N° 2 (Mars/Avril 2011) 

Public ISBD [article]  in The journal of essential oil research > Vol. 23 N° 2 (Mars/Avril 2011) . - pp. 29-33 Titre : Variability in volatile terpenoid compositions of peppermint cultivars and some wild accession from northern India Type de document : texte imprimé Auteurs : Rajendra C. Padalia, Auteur ; Ram S. Verma, Auteur ; Chandan S. Chanotiya, Auteur Année de publication : 2011 Article en page(s) : pp. 29-33 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Peppermint  Mentha  piperita  L.  Essential  oils  Menthol  Menthone  menthofuran Index. décimale : 646 Résumé : The terpenoid composition of different cultivars of peppermint (Mentha piperita L.) grown in Uttarakhand (India) and accessions collected from wild were analyzed by capillary GC and GC/MS. The major characteristic constituents of all the cultivars and wild accessions were menthol (30.3–47.8%), menthone (4.5–48.6%), menthyl acetate (1.0–9.5%), menthofuran (0.1–14.6%), 1,8-cineole (4.1–8.9%), neo-menthol (1.5–4.9%) and iso-menthone (1.2–3.9%). Although the major characteristic constituents were the same in all oils, there were considerable variations in their quantitative makeup. The contents of menthol and menthofuran were found relatively higher in all cultivars grown in foothills compared to mid-hills. Interestingly, menthofuran, a characteristic compound of the peppermint oil, was detected either at trace level or as a minor component in all the three wild accessions collected from mid-hills. Quality evaluation of peppermint oils revealed that the performance of cultivars grown at foothill conditions are very close to the requirements of European pharmacopoeia as compared to mid-hills. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2011.9700444 [article] Variability in volatile terpenoid compositions of peppermint cultivars and some wild accession from northern India [texte imprimé] / Rajendra C. Padalia, Auteur ; Ram S. Verma, Auteur ; Chandan S. Chanotiya, Auteur . - 2011 . - pp. 29-33. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 23 N° 2 (Mars/Avril 2011) . - pp. 29-33 Mots-clés : Peppermint  Mentha  piperita  L.  Essential  oils  Menthol  Menthone  menthofuran Index. décimale : 646 Résumé : The terpenoid composition of different cultivars of peppermint (Mentha piperita L.) grown in Uttarakhand (India) and accessions collected from wild were analyzed by capillary GC and GC/MS. The major characteristic constituents of all the cultivars and wild accessions were menthol (30.3–47.8%), menthone (4.5–48.6%), menthyl acetate (1.0–9.5%), menthofuran (0.1–14.6%), 1,8-cineole (4.1–8.9%), neo-menthol (1.5–4.9%) and iso-menthone (1.2–3.9%). Although the major characteristic constituents were the same in all oils, there were considerable variations in their quantitative makeup. The contents of menthol and menthofuran were found relatively higher in all cultivars grown in foothills compared to mid-hills. Interestingly, menthofuran, a characteristic compound of the peppermint oil, was detected either at trace level or as a minor component in all the three wild accessions collected from mid-hills. Quality evaluation of peppermint oils revealed that the performance of cultivars grown at foothill conditions are very close to the requirements of European pharmacopoeia as compared to mid-hills. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2011.9700444