Identificador persistente para citar o vincular este elemento:
http://hdl.handle.net/10553/45911
Título: | Antioxidant activity of polyphenols from hypogymnia tavaresii D. Hawksw. & P. James | Otros títulos: | Actividad antioxidante de los polifenoles de hypogymnia tavaresii D. Hawksw. & P. James | Autores/as: | Pérez, Elsa M.Rodríguez Toledo Marante, Francisco Javier Caballero Hernández, Josefa Bermejo Barrera,Jaime Estévez Rosas, Francisco Jesús |
Clasificación UNESCO: | 2403 Bioquímica | Palabras clave: | Secondary Metabolites Evaluate Lichens |
Fecha de publicación: | 2016 | Editor/a: | 0100-4042 | Proyectos: | Recursos Ambientales en la Provincia de Las Palmas.... (Estructurante-5.- Campo: Ciencias Experimentales) | Publicación seriada: | Química Nova | Resumen: | Lichen substances have more than one phenolic hydroxyl group attached to one or more benzene rings, thus qualifying them as polyphenols. The secondary metabolites isolated from the lichen H. tavaresii have been studied in a bid to find compounds protective against oxidative stress and free radical-induced damage. The compounds were identified based on their MS and H-1-NMR spectra as well as retention factors of TLC analysis. In addition to the previously described metabolites (atranorin, chloroatranorin, physodic and physodalic acids) of H. tavaresii, a further three were identified in its thalli: 2'-O-methylphysodone, isophysodic and ursolic acids. The newly identified compounds of H. tavaresii thalli may be useful in the chemotaxonomic classification of this species. Antioxidant effectiveness of the acetone extract's fractions was measured. The compounds of the active fractions were purified and exhibited 180-800 fold less radical scavenging activity than the reference substance alpha-(+)-tocopherol in a DPPH. model expressed by IC50 values. | URI: | http://hdl.handle.net/10553/45911 | ISSN: | 0100-4042 | DOI: | 10.5935/0100-4042.20160053 | Fuente: | Quimica Nova [ISSN 0100-4042], v. 39 (4), p. 456-461 |
Colección: | Artículos |
Citas SCOPUSTM
1
actualizado el 08-sep-2024
Citas de WEB OF SCIENCETM
Citations
1
actualizado el 08-sep-2024
Visitas
79
actualizado el 29-jun-2024
Descargas
75
actualizado el 29-jun-2024
Google ScholarTM
Verifica
Altmetric
Comparte
Exporta metadatos
Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.