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Title
Eucalyptus biomass residues from agro-forest and pulping industries as sources of high-value triterpenic compounds
Authors
R. M. A. Domingues D. J. S. Patinha G. D. A. Sousa J. J. Villaverde C. M. Silva C. S. R. Freire A. J. D. Silvestre and C. Pascoal Neto
Received
June 8, 2011
Published
Volume 45 Issue 7-8 September-October
Keywords
biorefinery, Eucalyptus nitens, Eucalyptus grandis, Eucalyptus urograndis (Eucalyptus grandis x
Abstract
A comparative study on the triterpenic acids composition of the outer barks of several Eucalyptus species (E. globulus, E. grandis, E. urograndis, E. maidenii and E. nitens) is reported. The contents of the main triterpenic acids identified in the five species varied between 4.5 g/kg in E. urograndis and 21.6 g/kg in E. nitens. It has been observed that, out of these Eucalyptus species outer barks, those from temperate and Mediterranean zones, namely E. nitens and E. globulus, are richer in triterpenic acids than the species from sub-tropical and tropical regions. Furthermore, E. globulus outer bark is clearly the richest in ursane acids, while E. nitens outer bark is the richest in oleanane and lupane acids.
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