Some Chemical Observation on a Natural Graft-Wood of Japanese Cypress (Chamaecyparis obtusa ENDL.) and Sawara Cypress (Chamaecyparis pisifera SIEB. et ZUCC.)

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Chemical analyses were carried out on a graft-wood of hinoki (Chamaecyparis obtusa) and sawara cypress (C. pisifera), and the results were compared with the data from normal woods of hinoki and sawara. The amount of boiling water soluble matter were much higher in the graft-wood than in normal woods (1.5-3.6 times), and also the amount of alcohol-benzene soluble matter in the graft-woods were two times higher than those of the normal woods. Lignin content varied little among the samples. α-Terpineol which is the most characteristic component to identify hinoki and sawara woods, borneol, DL-limonene and bornyl acetate were identified, respectively. Some group peaks which are supposed to be cadinenes and cadinols were also found on g.l.c. of steam volatile fraction. Sawaranin [2,3-desoxy-2-(p-hydroxy phenyl hexonic lactol)] was first isolated from methanol extracts of normal woods of hinoki and identified with the results of u.v.. i.r. and n.m.r

Studies on Wood Phenolics (Part V) : Chemical Properties and NMR Analysis of Milled Wood Lignins

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。TMSi (trimethylsilyl)-ethers of MWL's prepared by heating MWL's with reagent of pyridine-HMDS-TMSiCl were dissolved in carbon tetrachloride, arid analysed by NMR spectrometry. Large peaks of TMSi protons derived from hydroxyl groups appeared in high magnetic shielded ranges, and enabled to determine hydroxyl protons which were generally difficult to analyse by NMR. Some chemical properties such as distribution of molecular size and chemical analysis of three kinds of MWL's were also examined. The molecular wight (Mn) of the MWL's of Metasequoia, beech and bamboo were 2610, 2700 and 1740, respectively