| Titre : | Free and glycosidically bound volatiles in guava leaves (Psidium guajava L.) palmira ICA-I cultivar |
| Auteurs : | Mady García, Auteur ; Clara E. Quijano, Auteur ; Jorge A. Pino, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | The journal of essential oil research (Vol. 21 N° 2+ supplément vol.20, Mars/Avril 2009+ supplément 2008) |
| Article en page(s) : | pp. 131-134 |
| Note générale : | Génie Chimique |
| Langues : | Anglais |
| Index. décimale : | 646 |
| Tags : | Guava leaves Psidium guajava Myrtaceae Glycosidically bound volatiles |
| Résumé : |
Free and glycosidically bound volatiles obtained from the guava leaves (Psidium guajava L.) by liquid-liquid extraction and by chromatography, followed by enzymatic hydrolysis with non-selective pectinase respectively, were analyzed by capillary GC and GC/MS analyses.
A total of 39 free volatiles were detected (total amount of 1328 mg/ kg), with the major components being α-copaene, β-caryophyllene, and cadina-1,4-diene. Among the 47 detected glycosidically bound compounds (total amount of 7050 mg/kg), hexanol, benzyl alcohol, and (E)-3-hexenoic acid were found to be the major constituents. In aroma evaluation, the free volatile fraction showed a guava leaf-like aroma whereas the bound fraction was odorless. However, the characteristic herbaceous-green-fatty aroma was noted in the bound fraction after enzymatic hydrolysis. Upon the combination of the free and hydrolyzed bound fractions, a strongly fresh, guava leaf-like aroma was perceived. |
| DEWEY : | 665 |
| ISSN : | 1041-2905 |
| En ligne : | http://www.jeoronline.com/archive/detail/42#top |
