Table 1.

The chemical composition of the substrates analyzed (as % w/w)

Substrate	Avicel	Fibers 1(ND)	Fibers 2(ND) and Fibers 2(D)a	Fibers 3(ND)	Original biomass
Acid-insoluble lignin	nd	2.4	0.5	0.5	28.3
Acid-soluble lignin	nd	0.5	0.5	0.5	0.3
Extractives	nd	<0.3	<0.3	<0.3	2.8
Ash content	nd	<0.1	<0.1	<0.1	0.3
Xylose	2.2	1.5	1.5	1.7	6
Mannose	0.9	0.8	0.7	1.1	11.7
Arabinose	<0.1	<0.1	<0.1	<0.1	1.5
Galactose	<0.1	<0.1	<0.1	<0.1	2.4
Glucose	96.8	94.9	96.8	96.3	42.7
Total monosaccharides	99.9	97.2	99	99.1	64.3

nd not determined

^aCarbohydrate composition was only analyzed in Fibers 2(ND). Drying of Fibers 2(ND) to produce Fibers 2(D) was not expected to change the chemical composition