Table 1 Chemical composition of untreated and preprocessed poplar biomasses

40.8 ± 1.5^a

14.0 ± 1.2^a

58.3 ± 2.5^a

25.8 ± 1.1^a

5.5 ± 0.6^a

2.0 ± 0.1^a

40.5 ± 0.8^a

15.1 ± 0.3^a

59.4 ± 1.1^a

26.2 ± 0.2^a

5.6 ± 0.3^a

1.5 ± 0.1^b

40.8 ± 1.3^a

15.8 ± 0.7^b

59.9 ± 2.1^a

26.6 ± 1.5^a

4.9 ± 0.8^a

0.8 ± 0.1^c

42.8 ± 2.1^a

13.1 ± 0.6^c

58.8 ± 2.9^a

28.6 ± 1.4^a

4.7 ± 0.0^a

0.6 ± 0.2^c