Study of macromolecular constituents, volatile extractives and phenolics from candeia wood -Moquinia polymorpha (Less.) DC

• Published in: Ciência florestal Vol. 17; no. 1-2; pp. 145 - 155
• Main Authors: Lima, S.R. de, Oliveira, G.S. de, Morais, S.A.L. de, Nascimento, E.A. do, Chang, R
• Format: Journal Article
• Language: Portuguese
• Published: Universidade Federal de Santa Maria 01.01.2007
• Subjects: ASTERACEAE; BOIS; CANDEIA; COMPOSE PHENOLIQUE; COMPOSTO FENÓLICO; COMPUESTOS FENOLICOS; constituintes macromoleculares; extrativos; http://www.fao.org/aos/agrovoc#c_1793; http://www.fao.org/aos/agrovoc#c_5772; http://www.fao.org/aos/agrovoc#c_8421; MADEIRA; MADERA; Moquinia polymorpha; PHENOLIC COMPOUNDS; WOOD
• DOI: 10.5902/198050981946
• ISSN: 0103-9954

In this study, the main chemical components of Moquinia polymorpha (LESS.) DC. (candeia or cambará) wood were investigated. This wood is native in the Southern region of Minas Gerais - Brazil.  The chemical composition was:  47.5% of α-cellulose, 25.4% of A and B hemicelluloses, 24.0% of lignin, 73.2% of holocellulose, 3.82% of ethanol:cyclohexane  (1:1, v v-1) extractives, 3.21% of ethanol extractives and 4.04%  of hot water extractives.  The volatile composition was mainly: α-curcumene, α-dihydroturmerone, β-dihydroturmerone, cedranol, 1-cyclopentyl-3-[2,4-dimethylphenyl]propane. The total phenols analysis was carried out on methanol:water (MW) and acetone:water (AW) extracts. The last one presented better yield. The total phenols were determined by Folin-Ciocalteau and the modified Prussian blue assays.  Folin-Ciocalteau yielded 0.93 mg g-1 of wood for MW extract and 1.56 for AW extract; modified Prussian blue yielded 2.74 mg g-1 of wood for MW extract and 4.42 for AW extract. Proanthocyanidins were determined by n-buthanol-acid and vanillin assays. The n-buthanol acid yielded 0.012 mg g-1 of wood for MW extract and 0.017 for AW extract; vanillin: 0.29 mg g-1 of wood for MW extract and 0.58 for AW extract. 3-deoxy-proanthocyanidins were not detected.