高温乾燥によるスギ材心材抽出成分の量的変動  [in Japanese] Quantitative changes of sugi (Cryptomeria japonica) heartwood extractives by a high-temperature drying process  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

実用条件下で高温乾燥したスギ心持ち正角材(370cm×12cm×12cm)の高温乾燥(平均105℃,最高120℃)前後における耐久性成分の量的な変動について,黒心材と赤心材に分けて検討した。<BR>高温乾燥した心材中のテルペノイド性成分については,いずれの化合物にも天然乾燥材と比較して量的な減少が認められた。乾燥後の残存率は赤心材よりも黒心材のほうが大きかった。また,epicubebol,cubebolの減少は特異的であり,ほぼ100%の消失が確認された。一方,ノルリグナン類の含有量は黒心材と赤心材とで挙動が大きく異なった。黒心材では天然乾燥材よりも高温乾燥材のほうが含有量が大きく,高温乾燥条件下において酸化が進行していないと推定された。赤心材の場合には材中央部よりも木口部の含有量が高くなった。ノルリグナン類はテルペノイド類に比べ水親和性が大きく,乾燥にともなう水の移動によって木口面に集積されることが考えられた。

The extractives were quantitatively analyzed on heartwood samples cut from sugi (Cryptomeria japonica D. Don) square timbers dried under the processes of air drying and a high-temperature kiln drying (average temp. 105°C, maximum temp. 120°C). The residual terpenoids of the kiln-dried heartwood samples were smaller than those of the air-dried heartwood samples. No epicubebol or cubebol was determined although some quantities of other terpenoids were remained after the high-temperature kiln drying process. The quantitative change patterns of norlignans of sugi black heartwoods were different from those of sugi red heartwoods. The quantities of norlignans of black heartwoods after the kiln drying process were larger than those after the air drying process. It is as-sumed that no or less oxidation of the norlignans occurred under the kiln drying process. The amount of norlignans tended to increase in the end part more than in the center part of timber hav-ing red heartwood. This result suggested that the norlignans easily moved to the end part accompa-nying water movement along the grain of the timber during the high-temperature kiln drying proc-ess because these compounds were more hydrophillic than terpenoids.

Journal

  • MOKUZAI HOZON (Wood Protection)  

    MOKUZAI HOZON (Wood Protection) 32(5), 196-202, 2006-09-25 

    JAPAN WOOD PRESERVING ASSOCIATION

References:  12

You must have a user ID to see the references.If you already have a user ID, please click "Login" to access the info.New users can click "Sign Up" to register for an user ID.

Cited by:  2

You must have a user ID to see the cited references.If you already have a user ID, please click "Login" to access the info.New users can click "Sign Up" to register for an user ID.

Codes

  • NII Article ID (NAID)
    10018252704
  • NII NACSIS-CAT ID (NCID)
    AN00240373
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    02879255
  • NDL Article ID
    8524283
  • NDL Source Classification
    ZP21(科学技術--化学・化学工業--木材)
  • NDL Call No.
    Z17-745
  • Data Source
    CJP  CJPref  NDL  IR  J-STAGE 
Page Top