心材辺材別の木材成分に関する研究(第4報) : 落葉松のメタノール・リグニンの比較

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書誌事項

タイトル別名
  • Studies on the Wood-forming Constituents in the Heart Wood and the Sap Wood. (IV) : Comparison between the Lignin in the Heart Wood and that in the Sap Wood of Larix Kaempferi Sarg. by Methanol Method.

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説明

In regard to the comparison of the lignin in the heart wood and that in the sap wood of Larix Kaempferi Sarg. by methanol extraction, the authors obtained the following results. 1) The extraction of Larix Kaempferi Sarg. by methanol with a small quantity of hydrochloric acid is very difficult, and the percentage of extraction from the heart wood is about 20 per cent of the total lignin, and that of the sap wood is about 10 per cent. 2) the yield of the methanol lignin is the greatest by means of methanol with 3 per cent hydrochloric acid for dried wood meals, and the methanol-insoluble part in the extract is the smallest among the methanol extractions with various hydrochloric acid quantity. 3) The methanol-soluble methanol-lignin is more soluble than the buthanol lignin. 4) The divergencies between the heart wood lignin and the sap wood lignin by the methanol method are as follows. a) Color : H. W. L. is in general more brown than S. W. L. b) Melting Point : H. W. L. is 15℃ higher than S. W. L. c) Mean Molecular Weight : H. W. L. is more than twice as great as H. W. L. d) Methoxyl Radical: H. W. L. has 0.6 per cent more methoxyl radicals than S. W. L. e) Copper Number : H. W. L. has a greater copper number than S. W. L. the copper number of S. W. L. being about one-third of that of H. W. L .

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詳細情報 詳細情報について

  • CRID
    1390009224763308416
  • NII論文ID
    110001374319
  • NII書誌ID
    AN00055178
  • DOI
    10.15017/14959
  • HANDLE
    2324/14959
  • ISSN
    04530284
  • 本文言語コード
    ja
  • 資料種別
    departmental bulletin paper
  • データソース種別
    • JaLC
    • IRDB
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用可

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