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Fig. 13.

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Fig. 17.

Results of GPC analysis of the lignin sample expressed in standard units
| Mn (PS standard) [g/mol] | Mw (PSstandard) [g/mol] | Mw/Mn | 
|---|---|---|
| 2 710 | 5 970 | 2.20 | 
Chemical composition of plant raw materials
| Content of analyzed fractions [%] | ||||
|---|---|---|---|---|
| Rice husk | Pine bark | Coconut fiber | Oat bran | |
| Ash | 16.1 | 0.200 | 1.75 | 3.50 | 
| Compounds extractable in ethanol | 1.97 | 7.85 | 1.24 | 3.09 | 
| Cellulose | 44.3 | 25.6 | 40.7 | 5.61 | 
| Lignin | 29.6 | 45.2 | 45.8 | 5.72 |