アセチルブロマイド処理による材化石の研究
1966 年 1966 巻 84 号 p. 1-5
詳細
1966 年 1966 巻 84 号 p. 1-5
Acetylbromide dissolves the main constituents of wood i.e. cellulose, hemicellulose and lignin, but does not humic substance altered from these. Seventeen samples of fossil-wood from the late Miocene and up were treated with acetylbromide and the rate of dissolution of each sample was determined. The relation of the residual percentage of acetylbromide soluble substance to the assumed absolute age is shown in Fig. 1. The residual percentage is 100% at present, over 60% about 800,000 years ago, over 30% about 3,000,000 years ago and is considered to reach 0% about 8,000,000 years ago.
