| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Outline of Final Research Achievements |
In general, the contents of heartwood extractives tend to decrease from the outer part toward the inner part of heartwood. As one of the reasons for the decrease of norlignans in sugi heartwood, their secondary alterations were investigated.
Authentic norlignans were enzymatically polymerized in vitro, and five kinds of dimers were isolated and their chemical structures were determined. The chemical structures were supposed as the structural unit in the polymerfraction of sugi heartwood extract: natural norlignan polymer. A norlignan dimer and two kinds of trimers were also isolated from sugi heartwood and their chemical structures were supposed. Furthermore, the contents of the norlignan oligomers tend to increase from the outer part toward the inner part of heartwood. Thus, from the perspective of heartwood formation mechanisms, secondary alterations of the heartwood extractives over time was supposed as one of the causes of their radial decrease toward the inner heartwood.
|
