High value triterpenic compounds from the outer barks of several Eucalyptus species cultivated in Brazil and in Portugal
| Autor: | Carlos M. Silva, C. Pascoal Neto, Armando J. D. Silvestre, Rui M. A. Domingues, Carmen S. R. Freire, G.D.A. Sousa |
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| Rok vydání: | 2011 |
| Předmět: |
Eucalyptus grandis
0106 biological sciences Eucalyptus maidenii Biorefinery engineering.material complex mixtures 01 natural sciences Bark chemistry.chemical_compound Ursolic acid 010608 biotechnology Betulinic acid Botany Oleanolic acid biology 010405 organic chemistry Pulp (paper) Eucalyptus urograndis (Eucalyptus grandis × Eucalyptus urophylla) Triterpenic acids 15. Life on land biology.organism_classification Eucalyptus 0104 chemical sciences chemistry Eucalyptus globulus visual_art visual_art.visual_art_medium engineering Agronomy and Crop Science |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 0926-6690 |
| Popis: | The chemical composition of the lipophilic extracts of the inner and outer bark fractions of Eucalyptus grandis and Eucalyptus urograndis (E. grandis x Eucalyptus urophylla) cultivated in Brazil and Eucalyptus maidenii, cultivated in Portugal was studied by gas chromatography-mass spectrometry. The extracts were shown to be mainly composed of triterpenic compounds (along with mono and sesquiterpenes in E. maidenii) followed smaller amounts of fatty acids, fatty alcohols, and aromatic compounds. Triterpenic acids (mainly ursolic, betulinic and oleanolic acids), are particularly abundant in outer barks representing 5.2 g/kg, 5.7 g/kg and 9.3 g/kg in E. urograndis, E. grandis and E. maidenii outer barks, respectively. Although these compounds were found in considerably smaller amounts than those previously reported for Eucalyptus globulus, the total amounts of bark generated every year in South American pulp mills using E. urograndis and E. grandis, as well as the growth potential of E. maidenii plantations, the bark residues from these species are obvious candidates for the extraction of valuable triterpenic compounds. (C) 2010 Elsevier B.V. All rights reserved. BIIPP projec - QREN 11551 AFORE Project - FP7/2007-2013 CP-IP 228589-2 AFORE |
| Databáze: | OpenAIRE |
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