Table 3 Wet chemical analysis results expressed as percentage of oven-dry wood mass (mean ± standard deviation)

From: Oak wood degradation processes induced by the burial environment in the archaeological site of Biskupin (Poland)

Burial period (years)

Burial place

Holocellulose %a

Cellulose %

Lignin %

Extractives %

Ash %

0

Reference

69.9

38.5 ± 0.2

25.5 ± 0.2

3.5 ± 0.1

1.1 ± 0.1

2

SP1

70.1

36.1 ± 0.4

26.4 ± 0.5

2.4 ± 0.1

1.1 ± 0.1

4

70.3

36.9 ± 0.5

26.5 ± 0.3

1.8 ± 0.1

1.4 ± 0.1

6

70.4

37.5 ± 0.3

26.0 ± 0.2

2.1 ± 0.8

1.5 ± 0.1

8

64.8

38.5 ± 0.2

31.9 ± 0.2

1.8 ± 0.1

1.5 ± 0.1

10

65.2

37.5 ± 0.2

31.1 ± 0.8

1.9 ± 0.3

1.8 ± 0.1

2

SP4

67.9

36.3 ± 0.2

28.4 ± 0.5

2.6 ± 0.1

1.1 ± 0.1

4

68.3

37.1 ± 0.5

27.9 ± 0.5

2.5 ± 0.1

1.3 ± 0.1

6

68.1

38.3 ± 0.2

27.8 ± 0.2

2.0 ± 0,8

1.3 ± 0.1

8

65.2

39.8 ± 0.3

31.8 ± 0.3

1.8 ± 0.0

1.2 ± 0.1

10

65.9

38.9 ± 0.3

31.1 ± 0.5

1.5 ± 0.0

1.5 ± 0.1

  1. aThe standard deviation is not reported, as these values are calculated as a subtraction and are not obtained from an actual measurement
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