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

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....

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Published inCiência 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
LanguagePortuguese
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
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Summary: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.
Bibliography:100
K50
ISSN:0103-9954
1980-5098
DOI:10.5902/198050981946