落葉松の氣乾による蒸解効果に就いて
乾材法による効果の實態は何か?
1951 年 5 巻 7 号 p. 539-552,626
詳細
1951 年 5 巻 7 号 p. 539-552,626
When Larix Kaempferi Sarg. is seasoned as sap wood sawdust and heart wood sawdust respectively in a long time (6-12 months),
1) galactans and mannans in sawdusts are increased respectively but total celluloses are somewhat decreased and pentosans and lignins are almost unchanged.
2) in sulfite digestion with heart wood sawdust and sap wood sawdust, yields of pulps and total celluloses in the pulps are greatly increased and colors of pulps from heart wood are clearly changed but lignins in the pulps are increased.
3) extracts by organ;c solvents are increased, especially by alcohol benzene (I : I), aceton.
4) cellulose in the pulp from heart wood is easy to change in hydro-cellulose but by seasoning its degree is decreased greatly.
5) polysaccharides (gala ctan and mannan) are greatly dissolved in sulfite liquor at early stages of digestion, but by seasoning their solubilities are decreased in grade respectively.
6) ligains by method of conc. sulfuric acid are not identical between heart wood and sap wood and those differences of lignins are more and more decreased.
