Auteur João Henrique G. Lago
Documents disponibles écrits par cet auteur (5)
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Article : texte imprimé
João Henrique G. Lago, Auteur ; Cláudia B. Brochini, Auteur ; Nídia F. Roque, Auteur |The essential oils from leaves of three different specimens of Guarea guidonia were obtained by hydrodistillation. These crude oils were subjected to FID-GC and GC/MS analysis as well as to adsorption chromatographic separations. Several sesquit[...]
Article : texte imprimé
João Henrique G. Lago, Auteur ; Anair A. Reis, Auteur ; Dirceu Martins, Auteur |The leaves of Xylopia emarginata were submitted to steam distillation. The obtained essential oil was subjected to analysis by GC and GC/MS associated to 1H- and 13C-NMR spectral analysis, after chromatographic separation. The major identified c[...]
Article : texte imprimé
João Henrique G. Lago, Auteur ; Paulete Romoff, Auteur ; José R. Pirani, Auteur |The essential oils isolated from leaves of Guarea macrophylla var. tuberculata collected monthly during two years (from November 1997 to October 1999) were subjected to GC-FID and GC/MS analysis. The obtained data showed a significant variation [...]
Article : texte imprimé
Cecília V. Nuñez, Auteur ; João Henrique G. Lago, Auteur ; Nídia F. Roque, Auteur |The damaged branches of one specimen of Guarea guidonia, which had been blown down after a high wind, were submitted to steam distillation. The oil was analyzed by GC and GC/MS. The chromatographic profile indicated a difference in the compositi[...]
Article : texte imprimé
Melânia Lopes Cornélio, Auteur ; João Henrique G. Lago, Auteur ; Paulo Roberto H. Moreno, Auteur |The composition of the volatile oil from Aspidosperma cylindrocarpon Muell. Arg. leaves was investigated by GC, GC/MS and 13C-NMR spectroscopy. The oil was characterized by the presence of a high percentage of sesquiterpene hydrocarbons (45.6%) [...]
