Repositorio UVigo

Anthocyanins, phenolic compounds, and antioxidants from extractions of six eucalyptus species

Investigo Repository

Anthocyanins, phenolic compounds, and antioxidants from extractions of six eucalyptus species

Álvarez Bermúdez, Xana; Cancela Carral, María De Los Ángeles; Merchán, Yolanda; Sánchez Bermúdez, Ángel Manuel
 
DATE : 2021-10-20
UNIVERSAL IDENTIFIER : http://hdl.handle.net/11093/2599
UNESCO SUBJECT : 3106 Ciencia Forestal ; 3308 Ingeniería y Tecnología del Medio Ambiente ; 3303 Ingeniería y Tecnología Químicas
DOCUMENT TYPE : article

ABSTRACT :

The leaves of Eucalyptus have multiple biological activities such as antimicrobial, antiseptic, antioxidant, and antifungal. A Soxhlet extraction, SLE, and HD were used to obtain extracts from the leaves of six Eucalyptus species, E. globulus, E. oblicua, E. pavaflora, E. camaldulensis, E. viminalis, and E. nitens, and to study their antioxidant capacity. Solvents such as acetone, dichloromethane, ethanol, hexane, methanol, and water were used to study how polarity influences extraction yields. The SLE method achieved higher or similar yields, depending on the species and its composition, than the Soxlet method at a temperature of 50 °C. The highest yields were obtained with E. viminalis with methanol (42.5 wt.%), the highest phenolic content was obtained with E. nitens with methanol (124.17 mg GAE/g of extract), and the highest anthocyanin levels obtained were with E. nitens with hexane (5.05 mg CC/g of extract). E. nitens obtained almost five times more phenolic content than E. globulus; therefore, it is the most promising species. The high content of the compounds analysed ... [+]
The leaves of Eucalyptus have multiple biological activities such as antimicrobial, antiseptic, antioxidant, and antifungal. A Soxhlet extraction, SLE, and HD were used to obtain extracts from the leaves of six Eucalyptus species, E. globulus, E. oblicua, E. pavaflora, E. camaldulensis, E. viminalis, and E. nitens, and to study their antioxidant capacity. Solvents such as acetone, dichloromethane, ethanol, hexane, methanol, and water were used to study how polarity influences extraction yields. The SLE method achieved higher or similar yields, depending on the species and its composition, than the Soxlet method at a temperature of 50 °C. The highest yields were obtained with E. viminalis with methanol (42.5 wt.%), the highest phenolic content was obtained with E. nitens with methanol (124.17 mg GAE/g of extract), and the highest anthocyanin levels obtained were with E. nitens with hexane (5.05 mg CC/g of extract). E. nitens obtained almost five times more phenolic content than E. globulus; therefore, it is the most promising species. The high content of the compounds analysed confirm the good potential of these species to obtain value-added compounds. Our results demonstrate that the differences in the extract contents depend on the polarity of the solvents used. In addition, the use of these species will reduce the residue in the forest, which is greatly beneficial. [-]

Show full item record



Files in this item

Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International
2013 Universidade de Vigo, Todos los derechos reservados
Calidad So9001