Assertion: lignin | /r/HasProperty | carriço et al.2016
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Source sentences:
text: 1099 cm-1 was due to the reaction between isocyanate and hydroxyl groups of lignin; (c) the peaks of urea shifted from 1639 cm-1 to 1637 cm-1 suggesting that the introduction of lignin affect the hydrogen bonds between N-H and C=O because of the interaction between lignin and isocyanate (Carriço et al.2016).