Lipophilic extractives of the inner and outer barks of Eucalyptus globulus

authors	Freire, CSR; Silvestre, AJD; Neto, CP; Cavaleiro, JAS
nationality	International
journal	HOLZFORSCHUNG
author keywords	Eucalyptus globulus; bark; extractives; GC-MS analysis; alpha-hydroxy fatty acids; omega-hydroxy fatty acids; ferulic acid esters; triterpenoids
keywords	CHEMICAL-COMPOSITION; PITCH DEPOSITS; WOOD; SUBERIN; CHROMATOGRAPHY; CAMALDULENSIS; TRITERPENOIDS; CORK
abstract	The chemical compositions of the dichloromethane extracts of inner and outer harks of E, globulus wore studied by gas chromatography-mass spectrometry. The two fractions show very different chemical compositions: triterpenic acids, such as betulinic. ursolic and oleanolic acids, were the major components of the outer bark extract. whereas beta-sitosterol and beta-amirin along with palmitic, linoleic and oleic acids predominate in the inner bark extract, Several alpha- and beta-hydroxy fatty acids, recently reported for the first time as F. globulus wood components, were also identified in the outer and inner barks. In the outer bark extract. minor amounts of ferulic acid esters, also previously reported to occur in E. globulus wood were identified, In general. the inner bark lipophilic extractives resemble more closely that of E. globulus, wood.
publisher	WALTER DE GRUYTER & CO
issn	0018-3830
year published	2002
volume	56
issue	4
beginning page	372
ending page	379
digital object identifier (doi)	10.1515/HF.2002.059
web of science category	Forestry; Materials Science, Paper & Wood
subject category	Forestry; Materials Science
unique article identifier	WOS:000177547700007