Table 1 Chemical composition of untreated and preprocessed poplar biomass (as a percentage of the OD weight)

1.6 ± 0.1^a

10.7 ± 0.1^a

42.1 ± 0.9^a

14.3 ± 0.3^a

60.6 ± 1.2^ab

28.6 ± 0.8^a

4.8 ± 0.2^a

0.5 ± 0.1^b

4.6 ± 0.3^b

41.4 ± 0.9^a

15.3 ± 0.2^b

59.5 ± 1.2^bc

28.1 ± 0.2^ab

5.7 ± 0.7^a

1.6 ± 0.1^a

4.3 ± 0.4^b

42.5 ± 0.5^a

15.6 ± 0.1^b

61.8 ± 0.7^a

27.6 ± 0.2^ab

2.7 ± 0.1^b

1.4 ± 0.1^c

6.8 ± 0.2^c

39.6 ± 0.3^b

14.6 ± 0.1^a

57.9 ± 0.5^c

27.4 ± 0.2^b

5.2 ± 0.1^a

0.6 ± 0.0^a

3.5 ± 0.3^a

47.9 ± 0.4^a

14.4 ± 0.1^a

64.7 ± 0.7^a

26.1 ± 0.1^a

5.0 ± 0.6^a

0.1 ± 0.1^b

2.0 ± 0.1^b

48.4 ± 1.3^a

14.4 ± 0.4^a

64.9 ± 1.7^a

26.1 ± 0.2^a

4.4 ± 0.2^a

0.8 ± 0.1^c

3.0 ± 0.0^c

52.4 ± 0.9^b

15.7 ± 0.3^b

70.7 ± 1.3^b

25.8 ± 0.1^a

1.4 ± 0.1^b

0.4 ± 0.0^d

2.6 ± 0.1^d

49.4 ± 0.7^a

14.9 ± 0.3^a

66.8 ± 1.0^a

26.3 ± 0.5^a

4.8 ± 0.1^a