Zur Chemie und Biochemie des Teakholzes (Tectona grandis L. fil)

Sandermann, Wilhelm; Simatupang, M. H.

doi:10.1007/bf02610269

Cited by 60 publications

(25 citation statements)

References 19 publications

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“…Natural durability is undoubtedly derived from the wood's extractives. Quinones and their derivatives have been reported to act against termite and fungal attacks (Rudman and Gay 1961;Sandermann and Simatupang 1966;Haupt et al 2003;Sumthong et al 2006;Thulasidas and Bhat 2007). Windeisen et al (2003) detected some terpenes and toxic quinones in teakwood by petroleum ether and acetone in successive extractions.…”

Section: Extractive Contentsmentioning

confidence: 99%

Chemical Characteristics of Teak Wood Attacked by Neotermes tectonae

Lukmandaru¹

2015

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The teak trees in certain areas of Java Island are frequently attacked by Neotermes tectonae termites. Trees attacked by this species have a tumor-like growth in the stem that can be easily identified in the field. This study evaluated the chemical properties of the attacked wood. Based on a visual inspection, the type of attacks were classified as either type I, if included phloem was formed in the heartwood, or type II, which was distinguished by the softened and hollowed areas in the heartwood. For each type, three trees were cut along with a healthy tree for comparison. Comparison among type I, type II, and normal tree tissues showed huge differences in hemicellulose and extractive contents, composition of ethanol-toluene soluble extracts, ash/acid insoluble ash contents, and pH values. Comparing the two types of abnormalities along the radial direction, significant differences were observed in the cellulose contents. The lowest values of both sugars were obtained in the soft part of type II. Further, the levels of ethanol-toluene soluble extracts and their fractions (mainly low-polarity fractions) were affected by the radial direction. No significant differences in radial direction were found in the inorganic materials levels or in pH values.

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Section: Extractive Contentsmentioning

confidence: 99%

Chemical Characteristics of Teak Wood Attacked by Neotermes tectonae

Lukmandaru¹

2015

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“…Une étude détaillée de la structure des constituants chimiques de l'ordre des Cupressales a été publiée par Erdtman et Norin en 1966 [40]. [29,30].…”

Section: Aspects Botaniquesunclassified

“…Ainsi, le teck (Tectona grandis, Verbénacées) a été valorisé grâce à sa résistance à la biodégradation et à sa stabilité dimensionnelle après séchage [40]. Le cèdre du Liban (Cedrus libani, Pinacées) est connu pour sa durabilité naturelle [18].…”

Section: Introductionunclassified

Caract�risation et origine des tropolones responsables de la durabilit� naturelle des Cupressac�es. Application potentielle en pr�servation du bois

Haluk

Roussel

2000

Ann. For. Sci.

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Résumé -L'objectif de cette revue est de présenter la nature chimique d'une famille de composés extractibles appelée tropolones, répertoriée dans l'ordre des Cupressales et considérée comme étant responsable de la durabilité naturelle des essences contenant ces métabolites secondaires. Des tropolones, en particulier les α, β et γ-thujaplicines, ont souvent été isolées à partir de Cupressacées (Cupressus, Chamaecyparis, Juniperus, Thuja, …) qui possèdent en effet un bois très résistant à la biodégradation. Des études déjà anciennes ont montré la toxicité importante des tropolones vis-à-vis des champignons de la pourriture du bois et des insectes. Il serait donc intéressant de pouvoir exploiter cette propriété au niveau industriel en substituant les agents chimiques de préservation du bois (CCA, etc.) par des molécules naturelles biocides. Ce concept peut donc constituer un enjeu prometteur pour le respect de l'environnement. Comme l'extraction de ces substances par des méthodes habituelles (solvant, CO 2 supercritique) ou leur synthèse chimique, onéreuse et peu rentable, ne sont pas envisageables au niveau industriel, l'exploitation des biotechnologies végétales (cals, suspensions cellulaires) peut constituer une démarche judicieuse pour l'obtention rapide de ces molécules biocides. En effet, la biosynthèse des tropolones a été obtenue par culture cellulaire de Thuja plicata et des premiers essais d'imprégnation d'éprouvettes de bois avec un extrait brut obtenu à partir des cellules végétales tendent à confirmer l'efficacité antifongique de ce nouveau type de traitement de préservation du bois.tropolones / Cupressacées / durabilité naturelle / préservation du bois / biotechnologies végétales Abstract -Characterization and origin of tropolones responsible for the cupressales natural durability. Potential application to wood preservation. The aim of this review is to present the chemical structure of a group of compounds naturally found in the trees belonging to the Order of the Cupressales, and being considered responsible for this wood species natural durability: namely tropolones. These compounds, and particularly the α, β and γ-thujaplicin, have often been isolated from Cupressaceae (Cupressus, Chamaecyparis, Juniperus, Thuja, …), which timber is extremely resistant to biodegradation. Previous studies have shown the important inhibition properties of the tropolones towards wood-destroying fungi and insects. Then, it would be an environmental and safety challenge to use these properties at an industrial scale, as a substitution to the toxic wood preservatives (such as CCA). However, either the extraction of these molecules (solvent extraction, CO 2 supercritical fluid, …) or their synthesis are far too expensive for such an application. The use of biotechnologies (cals, cell suspensions, …) could be judicious solution to get a cost-effective production of tropolones. Biosynthesis of tropolones from cell cultures of Thuja plicata has already been assessed, and first wood impregnation trials with crude extracts ha...

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“…The good abrasion resistance and durability properties of teak wood are often associated with the occurrence of caoutchouc (Sandermann et al 1966). It was reported that petroleum ether can remove the hydrophobic caoutchouc (Yamamoto et al 1998), but in this study the teak wood extracted with petroleum either did not exhibit the weakest dimensional stability, the teak wood extracted with methanol presented the weakest dimensional stability.…”

Section: Gc-ms Characterization Of Teak Wood Extractivesmentioning

confidence: 52%

“…In China, teak has been planted in 7 provinces, latitude 18° to 26° 35' N and longitude 97° to 122 °E (Chen et al 2000), and its plantation area is about 15,000 ha (Zhou et al 2001). It is one of the most valuable tropical hardwood species on the international market (Sandermann 1966;Lourenco 2015). Teak wood from natural forests and plantations with long rotation ages has an established reputation due to its outstanding quality.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Tectona grandis Extractives by GC-MS and IR and their Infusion into Rubberwood to Modify Dimensional Stability

et al. 2017

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Teak (Tectona grandis) has been popularly known in the wood industry as a precious material due to its natural dimensional stability. To explore the main components affecting the dimensional stability of teak wood, the teak wood samples were extracted with different polar solvents, and the extractives were impregnated into rubberwood specimens to determine their effect on the dimensional stability of the modified rubberwood. The results showed that the methanol extractives of the teak wood exhibited the most significant effect on the dimensional stability of the rubberwood. The extractives were characterized by infrared (IR) and gas chromatograph/ mass spectrum (GC/MS). The GC/MS results showed that the methanol extractives primarily contained 9,10-anthracenedione, 1,1-dimethyl-3,4-bis(1-methylethenyl), and alcohol compounds. It was speculated that the alcohol compounds in the methanol extractives reacted with polar hydroxyl groups in the cell wall, which resulted in a decrease in the size of the site combined with bound water. Moreover, the hydrophobic hydrocarbon compound was impregnated into rubberwood to form a thin layer of protective film in the cells into which the water could not enter under 20 °C and 80% RH.

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Zur Chemie und Biochemie des Teakholzes (Tectona grandis L. fil)

Cited by 60 publications

References 19 publications

Chemical Characteristics of Teak Wood Attacked by Neotermes tectonae

Chemical Characteristics of Teak Wood Attacked by Neotermes tectonae

Caract�risation et origine des tropolones responsables de la durabilit� naturelle des Cupressac�es. Application potentielle en pr�servation du bois

Characterization of Tectona grandis Extractives by GC-MS and IR and their Infusion into Rubberwood to Modify Dimensional Stability

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