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. 2022 Jun 10;27(12):3741. doi: 10.3390/molecules27123741

Figure 3.

Figure 3

Heat release rate (HRR) in the MCC tests of unmodified and N-modified pure compounds: (a) SW kraft lignin, (b) SW CatLignin, (c) HW kraft lignin, and (d) Spruce tannin. The result of test 1 is shown for each compound.