Lignin
2007
Saake, Bodo | Lehnen, Ralph
Alemán. Lignin is one of the three major constituents of vascular plants, the other two being cellulose and hemicelluloses. The name lignin is derived from the Latin word lignum meaning wood. After cellulose, lignin is the most abundant natural (terrestrial) organic polymer. Its content is higher in softwoods (27-33 %) than in hardwoods (18-25 %) and grasses (17-24 %). The highest amounts of lignin (35-40 %) occur in compression wood on the lower part of branches and leaning stems of conifers. Lignin does not occur in algae, lichens, or mosses, whereas the 'lignins' of bark differ in their structure from typical wood lignins.
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