Scientia Silvae Sinicae ›› 1998, Vol. 34 ›› Issue (3): 97-103.
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Bosun Zu,Qin Zhou
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Abstract:
A variety of simulative experiments on the discoloration behavior of catalpol, paulownin and sesamin separated from methanol-water extractive of Paulownia wood (Paulownia elongata S.Y.Hu) were conducted under different conditions. The results indicate that the color change of catalpol is mainly affected by acidity, while the discoloration of paulownin and sesamin are caused by both radiation and oxygen. The variation of temperature and humidity also have effects on the discoloring of catalpol. The color change of Paulownia wood is a result of a combination of all the factors. A tentative mechanisms of discoloring reaction were figued out.
Key words: Paulownia elongata, Discoloring components, Catalpol, Sesamin, Paulownin
Bosun Zu,Qin Zhou. DISCOLORATION OF PAULOWNIA WOOD: SUSCEPTIBILITY OF EXTRACTIVES[J]. Scientia Silvae Sinicae, 1998, 34(3): 97-103.
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Fig.反应1
Acid hydrolysis of catalpol"
Fig.反应2
Acid catalytical rearrangement of catalpol"
Fig.
The tentative products of catalpol rearrangement produced by acid catalysi"
Fig.反应3
The condensation of 1, 5 -dialdehyde"
Fig.反应4
The oxidation of acid hydrolysis, rearrangement and condensation products of catalpol"
Fig.反应5
The oxidation products of paulow nin and its rearrangem ent"
Fig.反应6
The oxidation products of sesamin and its rearrangement"