𝔖 Bobbio Scriptorium
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Structural studies on the chemical bonds between lignins and carbohydrates in spruce wood

✍ Scribed by Ö. Eriksson; D. A. I. Goring; B. O. Lindgren

Publisher
Springer
Year
1980
Tongue
English
Weight
647 KB
Volume
14
Category
Article
ISSN
0043-7719

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✦ Synopsis

A lignin-carbohydrate material from black spruce (Picea mariana) was treated with a hemicellulase mixture. The carbohydrates in the remaining material were studied by the following methods, a) Treatment with 0.1 M NaOH in the presence of sodium borohydride followed by selective hydrolysis of the furanosidic bonds, b) Smith degradation (periodate oxidation followed by mild acid hydrolysis). The result~ obtained indicate that lignin is bound to all types of sugar units in the hemicelluloses. For arabino-4-O-methylglucuronoxylan, linkages to the side-chain units seem to dominate. The links to the 4-O-methylglucuronic acid units are esler bonds, probably benzyl ester bonds.Those to the other sugar units in the hemicelluloses are ether bonds, probably benzyl ether bonds. The results suggest, furthermore, that fractions of cellulose axe linked to lignin.

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