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      Análise da madeira de Pinus oocarpa parte I: estudo dos constituintes macromoleculares e extrativos voláteis Translated title: Chemical analysis of Pinus oocarpa wood part I: quantification of macromolecular components and volatile extractives

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          Abstract

          Neste estudo foram analisados os principais componentes químicos da madeira de Pinus oocarpa, cultivado na região do cerrado. A composição química dessa madeira foi: 59,05% de a-celulose, 21,22% de hemiceluloses A e B, 25,18% de lignina, 2,78% de extrativos em diclorometano, 4,38% de extrativos em etanol:tolueno, 4,31% de extrativos em água quente e 1,26% de cinzas. O conteúdo de celulose foi relativamente elevado, indicando que essa madeira possui grande potencial para produção de pasta de celulose. Investigou-se, também, a composição dos extrativos. Os principais constituintes do extrato diclorometano dessa madeira foram os ácidos diterpênicos, além dos ácidos palmítico e oléico. No óleo essencial, extraído por aparelho de Clevenger, os principais componentes identificados foram aromadendreno, ledano, hexadecanal e ácido oléico.

          Translated abstract

          The chemical composition of Pinus oocarpa wood cultivated in the Brazilian cerrado was established. The obtained results were: a-cellulose (59.05%), hemicelluloses A and B (21.22%), lignin (25.18%), dichloromethane extractives (2.78%), ethanol:toluene extractives (4.38%), hot water extractives (4.31%) and ash (1.26%). The cellulose content was high. This result opens perspectives for using Pinus oocarpa wood in pulp and paper industries. Most of the dichloromethane extractives were diterpenic, palmitic and oleic acids. The volatile composition, obtained by means of the Clevenger method followed by GC-MS analysis was constituted mainly by aromadendrene, ledane, hexadecanal and oleic acid.

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          Most cited references20

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          Identification of essential oil components by gás chromatography mass spectroscopy

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            Optimizing acid-hydrolysis: a critical step for production of ethanol from mixed wood chips

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              Methods of wood chemistry

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                Author and article information

                Journal
                rarv
                Revista Árvore
                Rev. Árvore
                Sociedade de Investigações Florestais (Viçosa, MG, Brazil )
                0100-6762
                1806-9088
                June 2005
                : 29
                : 3
                : 461-470
                Affiliations
                [02] orgnameUniversidade Federal de Uberlândia orgdiv1Faculdade de Engenharia Química
                [01] orgnameUniversidade Federal de Uberlândia orgdiv1Instituto de Química salemos@ 123456ufu.br
                Article
                S0100-67622005000300014 S0100-6762(05)02900314
                69e64247-074e-44df-84ba-9d4b9ba27c39

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 01 September 2003
                : 20 April 2005
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 22, Pages: 10
                Product

                SciELO Brazil


                macromolecular components and extractives,Pinus oocarpa,componentes macromoleculares e extrativos

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