Free and glycosidically bound volatiles in guava leaves (Psidium guajava L.) palmira ICA-I cultivar / Mady García in The journal of essential oil research, Vol. 21 N° 2+ supplément vol.20 (Mars/Avril 2009+ supplément 2008)  

Free and glycosidically bound volatiles in guava leaves (Psidium guajava L.) palmira ICA-I cultivar [texte imprimé] / Mady García, Auteur ; Clara E. Quijano, Auteur ; Jorge A. Pino, Auteur . - pp. 131-134.
Génie Chimique
Langues : Anglais (eng)
in The journal of essential oil research > Vol. 21 N° 2+ supplément vol.20 (Mars/Avril 2009+ supplément 2008) . - pp. 131-134

Mots-clés :	Guava leaves Psidium guajava Myrtaceae Glycosidically bound volatiles
Index. décimale :	646
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
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