Teak, Tectona

Methyl, 2-hydroxymethyl-, and 2-formylanthraquinones in the heart wood of teak (Tectona grandis, Verbenaceae) are effective in inhibiting termite activity (105). Several naphthoquinone derivatives including lapachol are thought to impart marine borer resistance to woods, e.q. that of Tabebuia quayacan (Bignoniaceae) (108). 

Several types of woods that contain anthraquinones and related compounds are highly resistant to attack by marine borers (Southwell and Bultman, 1971). 2-Methyl- (57), 2-hydroxymethyl- (75) and 2-formylanthraquinones in the heartwood of teak (Tectona grandis, Verbenaceae) are effec-... 

Deoxylapachol is the main allergen identified in teak (Tectona grandis). Sensitization often concerns people in woodwork. 

Lapachol, a benzoquinone, is a secondary allergen in teak Tectona grandis). 

Sandermann W, Barghoorn A W 1963 Uber Inhaltsstoffe aus Teak Tectona grandis L.) I. Isolierung und Konstitution eines toxischen Teakchinons. Chem Ber 96 2182-2185... 

Oroxylum indicum [leaf] (Bignoniaceae), Cassia senna (Fabaceae), Aloe vera, A. spp., Asphodelus microcarpus [tuber], Xanthorrhea australis [flower] (Liliaceae), Rheum spp. (Polygonaceae), Tectona grandis [teak wood] (Verbenaceae) Angelica archangelica [root],... 

Pandey BL, Goel RK, Pathak NKR, Biswas M, Das PK. Effect of Tectona grandis linn, (common teak tree) on experimental ulcers and gastric secretion. Indian J Med Res 1982 76(suppl) 89-94. 

The West African timber, Iroko, Kambala, is used frequently as a substitute for teak because it possesses many of the desirable features of Tectona grandis. For decades it has been in demand due to its strength and durability for construction work, especially in making windows and door frames, and in shipbuilding. 

Tectona Teak, teck, djati Desoxylapachol, may DRY sawdust, to Burma and SE Asia. Can... 

In Tectona grandis (teak) extractives are responsible for three kinds of gluing problems (14) 1) Alcohol- and benzene-soluble compounds (11.5% of dry wood) hinder glue penetration into wood 2) formation of hydrochloric acid is delayed by hot-water-soluble compounds (the inhibitors originate in Ca, Mg, and K salts of acidic sugars in the methanol insolubles of the hot-water extract) and 3) the solidified glue is hydrolyzed by the methanol-soluble fraction of the hot-water extracts. 

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